X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fswrast%2Fs_texture.c;h=d35bea96b92a43b0a965784adba7e5ef6f28c671;hb=3423488d55b9c483fcdb3996eb89b424c1031d24;hp=6f38aab7f0af18fa2a2c5ad167dd6df5f273cc9f;hpb=d12a871b21adee531661f4cf6561d2ffda685359;p=mesa.git diff --git a/src/mesa/swrast/s_texture.c b/src/mesa/swrast/s_texture.c index 6f38aab7f0a..d35bea96b92 100644 --- a/src/mesa/swrast/s_texture.c +++ b/src/mesa/swrast/s_texture.c @@ -1,8 +1,7 @@ /* * Mesa 3-D graphics library - * Version: 5.1 * - * Copyright (C) 1999-2003 Brian Paul All Rights Reserved. + * Copyright (C) 2011 VMware, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), @@ -17,4252 +16,371 @@ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. */ - -#include "glheader.h" -#include "context.h" -#include "colormac.h" -#include "macros.h" -#include "imports.h" -#include "texformat.h" -#include "teximage.h" - -#include "s_context.h" -#include "s_texture.h" - - -/* - * These values are used in the fixed-point arithmetic used - * for linear filtering. - */ -#define WEIGHT_SCALE 65536.0F -#define WEIGHT_SHIFT 16 - - -/* - * Compute the remainder of a divided by b, but be careful with - * negative values so that GL_REPEAT mode works right. +/** + * Functions for mapping/unmapping texture images. */ -static INLINE GLint -repeat_remainder(GLint a, GLint b) -{ - if (a >= 0) - return a % b; - else - return (a + 1) % b + b - 1; -} -/* - * Used to compute texel locations for linear sampling. - * Input: - * wrapMode = GL_REPEAT, GL_CLAMP, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_BORDER - * S = texcoord in [0,1] - * SIZE = width (or height or depth) of texture - * Output: - * U = texcoord in [0, width] - * I0, I1 = two nearest texel indexes - */ -#define COMPUTE_LINEAR_TEXEL_LOCATIONS(wrapMode, S, U, SIZE, I0, I1) \ -{ \ - if (wrapMode == GL_REPEAT) { \ - U = S * SIZE - 0.5F; \ - if (tObj->_IsPowerOfTwo) { \ - I0 = IFLOOR(U) & (SIZE - 1); \ - I1 = (I0 + 1) & (SIZE - 1); \ - } \ - else { \ - I0 = repeat_remainder(IFLOOR(U), SIZE); \ - I1 = repeat_remainder(I0 + 1, SIZE); \ - } \ - } \ - else if (wrapMode == GL_CLAMP_TO_EDGE) { \ - if (S <= 0.0F) \ - U = 0.0F; \ - else if (S >= 1.0F) \ - U = (GLfloat) SIZE; \ - else \ - U = S * SIZE; \ - U -= 0.5F; \ - I0 = IFLOOR(U); \ - I1 = I0 + 1; \ - if (I0 < 0) \ - I0 = 0; \ - if (I1 >= (GLint) SIZE) \ - I1 = SIZE - 1; \ - } \ - else if (wrapMode == GL_CLAMP_TO_BORDER) { \ - const GLfloat min = -1.0F / (2.0F * SIZE); \ - const GLfloat max = 1.0F - min; \ - if (S <= min) \ - U = min * SIZE; \ - else if (S >= max) \ - U = max * SIZE; \ - else \ - U = S * SIZE; \ - U -= 0.5F; \ - I0 = IFLOOR(U); \ - I1 = I0 + 1; \ - } \ - else if (wrapMode == GL_MIRRORED_REPEAT) { \ - const GLint flr = IFLOOR(S); \ - if (flr & 1) \ - U = 1.0F - (S - (GLfloat) flr); /* flr is odd */ \ - else \ - U = S - (GLfloat) flr; /* flr is even */ \ - U = (U * SIZE) - 0.5F; \ - I0 = IFLOOR(U); \ - I1 = I0 + 1; \ - if (I0 < 0) \ - I0 = 0; \ - if (I1 >= (GLint) SIZE) \ - I1 = SIZE - 1; \ - } \ - else if (wrapMode == GL_MIRROR_CLAMP_ATI) { \ - U = (GLfloat) fabs(S); \ - if (U >= 1.0F) \ - U = (GLfloat) SIZE; \ - else \ - U *= SIZE; \ - U -= 0.5F; \ - I0 = IFLOOR(U); \ - I1 = I0 + 1; \ - } \ - else if (wrapMode == GL_MIRROR_CLAMP_TO_EDGE_ATI) { \ - U = (GLfloat) fabs(S); \ - if (U >= 1.0F) \ - U = (GLfloat) SIZE; \ - else \ - U *= SIZE; \ - U -= 0.5F; \ - I0 = IFLOOR(U); \ - I1 = I0 + 1; \ - if (I0 < 0) \ - I0 = 0; \ - if (I1 >= (GLint) SIZE) \ - I1 = SIZE - 1; \ - } \ - else { \ - ASSERT(wrapMode == GL_CLAMP); \ - if (S <= 0.0F) \ - U = 0.0F; \ - else if (S >= 1.0F) \ - U = (GLfloat) SIZE; \ - else \ - U = S * SIZE; \ - U -= 0.5F; \ - I0 = IFLOOR(U); \ - I1 = I0 + 1; \ - } \ -} +#include "main/context.h" +#include "main/fbobject.h" +#include "main/teximage.h" +#include "main/texobj.h" +#include "swrast/swrast.h" +#include "swrast/s_context.h" -/* - * Used to compute texel location for nearest sampling. +/** + * Allocate a new swrast_texture_image (a subclass of gl_texture_image). + * Called via ctx->Driver.NewTextureImage(). */ -#define COMPUTE_NEAREST_TEXEL_LOCATION(wrapMode, S, SIZE, I) \ -{ \ - if (wrapMode == GL_REPEAT) { \ - /* s limited to [0,1) */ \ - /* i limited to [0,size-1] */ \ - I = IFLOOR(S * SIZE); \ - if (tObj->_IsPowerOfTwo) \ - I &= (SIZE - 1); \ - else \ - I = repeat_remainder(I, SIZE); \ - } \ - else if (wrapMode == GL_CLAMP_TO_EDGE) { \ - /* s limited to [min,max] */ \ - /* i limited to [0, size-1] */ \ - const GLfloat min = 1.0F / (2.0F * SIZE); \ - const GLfloat max = 1.0F - min; \ - if (S < min) \ - I = 0; \ - else if (S > max) \ - I = SIZE - 1; \ - else \ - I = IFLOOR(S * SIZE); \ - } \ - else if (wrapMode == GL_CLAMP_TO_BORDER) { \ - /* s limited to [min,max] */ \ - /* i limited to [-1, size] */ \ - const GLfloat min = -1.0F / (2.0F * SIZE); \ - const GLfloat max = 1.0F - min; \ - if (S <= min) \ - I = -1; \ - else if (S >= max) \ - I = SIZE; \ - else \ - I = IFLOOR(S * SIZE); \ - } \ - else if (wrapMode == GL_MIRRORED_REPEAT) { \ - const GLfloat min = 1.0F / (2.0F * SIZE); \ - const GLfloat max = 1.0F - min; \ - const GLint flr = IFLOOR(S); \ - GLfloat u; \ - if (flr & 1) \ - u = 1.0F - (S - (GLfloat) flr); /* flr is odd */ \ - else \ - u = S - (GLfloat) flr; /* flr is even */ \ - if (u < min) \ - I = 0; \ - else if (u > max) \ - I = SIZE - 1; \ - else \ - I = IFLOOR(u * SIZE); \ - } \ - else if (wrapMode == GL_MIRROR_CLAMP_ATI) { \ - /* s limited to [0,1] */ \ - /* i limited to [0,size-1] */ \ - const GLfloat u = (GLfloat) fabs(S); \ - if (u <= 0.0F) \ - I = 0; \ - else if (u >= 1.0F) \ - I = SIZE - 1; \ - else \ - I = IFLOOR(u * SIZE); \ - } \ - else if (wrapMode == GL_MIRROR_CLAMP_TO_EDGE_ATI) { \ - /* s limited to [min,max] */ \ - /* i limited to [0, size-1] */ \ - const GLfloat min = 1.0F / (2.0F * SIZE); \ - const GLfloat max = 1.0F - min; \ - const GLfloat u = (GLfloat) fabs(S); \ - if (u < min) \ - I = 0; \ - else if (u > max) \ - I = SIZE - 1; \ - else \ - I = IFLOOR(u * SIZE); \ - } \ - else { \ - ASSERT(wrapMode == GL_CLAMP); \ - /* s limited to [0,1] */ \ - /* i limited to [0,size-1] */ \ - if (S <= 0.0F) \ - I = 0; \ - else if (S >= 1.0F) \ - I = SIZE - 1; \ - else \ - I = IFLOOR(S * SIZE); \ - } \ -} - - -/* Power of two image sizes only */ -#define COMPUTE_LINEAR_REPEAT_TEXEL_LOCATION(S, U, SIZE, I0, I1) \ -{ \ - U = S * SIZE - 0.5F; \ - I0 = IFLOOR(U) & (SIZE - 1); \ - I1 = (I0 + 1) & (SIZE - 1); \ +struct gl_texture_image * +_swrast_new_texture_image( struct gl_context *ctx ) +{ + (void) ctx; + return (struct gl_texture_image *) CALLOC_STRUCT(swrast_texture_image); } -/* - * Compute linear mipmap levels for given lambda. +/** + * Free a swrast_texture_image (a subclass of gl_texture_image). + * Called via ctx->Driver.DeleteTextureImage(). */ -#define COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda, level) \ -{ \ - if (lambda < 0.0F) \ - level = tObj->BaseLevel; \ - else if (lambda > tObj->_MaxLambda) \ - level = (GLint) (tObj->BaseLevel + tObj->_MaxLambda); \ - else \ - level = (GLint) (tObj->BaseLevel + lambda); \ +void +_swrast_delete_texture_image(struct gl_context *ctx, + struct gl_texture_image *texImage) +{ + /* Nothing special for the subclass yet */ + _mesa_delete_texture_image(ctx, texImage); } - -/* - * Compute nearest mipmap level for given lambda. - */ -#define COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda, level) \ -{ \ - GLfloat l; \ - if (lambda <= 0.5F) \ - l = 0.0F; \ - else if (lambda > tObj->_MaxLambda + 0.4999F) \ - l = tObj->_MaxLambda + 0.4999F; \ - else \ - l = lambda; \ - level = (GLint) (tObj->BaseLevel + l + 0.5F); \ - if (level > tObj->_MaxLevel) \ - level = tObj->_MaxLevel; \ +static unsigned int +texture_slices(const struct gl_texture_image *texImage) +{ + if (texImage->TexObject->Target == GL_TEXTURE_1D_ARRAY) + return texImage->Height; + else + return texImage->Depth; } - - -/* - * Note, the FRAC macro has to work perfectly. Otherwise you'll sometimes - * see 1-pixel bands of improperly weighted linear-sampled texels. The - * tests/texwrap.c demo is a good test. - * Also note, FRAC(x) doesn't truly return the fractional part of x for x < 0. - * Instead, if x < 0 then FRAC(x) = 1 - true_frac(x). - */ -#define FRAC(f) ((f) - IFLOOR(f)) - - - -/* - * Bitflags for texture border color sampling. - */ -#define I0BIT 1 -#define I1BIT 2 -#define J0BIT 4 -#define J1BIT 8 -#define K0BIT 16 -#define K1BIT 32 - - -/* - * Do the lookup for GL_SGI_texture_color_table. - */ -void -_swrast_texture_table_lookup(const struct gl_color_table *table, - GLuint n, GLchan rgba[][4]) +unsigned int +_swrast_teximage_slice_height(struct gl_texture_image *texImage) { - if (!table->Table || table->Size == 0) - return; - - switch (table->Format) { - case GL_INTENSITY: - /* replace RGBA with I */ - if (table->FloatTable) { - const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF; - const GLfloat *lut = (const GLfloat *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale); - GLchan c; - CLAMPED_FLOAT_TO_CHAN(c, lut[j]); - rgba[i][RCOMP] = rgba[i][GCOMP] = - rgba[i][BCOMP] = rgba[i][ACOMP] = c; - } - } - else { -#if CHAN_TYPE == GL_UNSIGNED_BYTE - if (table->Size == 256) { - /* common case */ - const GLchan *lut = (const GLchan *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - const GLchan c = lut[rgba[i][RCOMP]]; - rgba[i][RCOMP] = rgba[i][GCOMP] = - rgba[i][BCOMP] = rgba[i][ACOMP] = c; - } - } - else -#endif - { - const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF; - const GLchan *lut = (const GLchan *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale); - rgba[i][RCOMP] = rgba[i][GCOMP] = - rgba[i][BCOMP] = rgba[i][ACOMP] = lut[j]; - } - } - } - break; - case GL_LUMINANCE: - /* replace RGB with L */ - if (table->FloatTable) { - const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF; - const GLfloat *lut = (const GLfloat *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale); - GLchan c; - CLAMPED_FLOAT_TO_CHAN(c, lut[j]); - rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = c; - } - } - else { -#if CHAN_TYPE == GL_UNSIGNED_BYTE - if (table->Size == 256) { - /* common case */ - const GLchan *lut = (const GLchan *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - const GLchan c = lut[rgba[i][RCOMP]]; - rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = c; - } - } - else -#endif - { - const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF; - const GLchan *lut = (const GLchan *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale); - rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = lut[j]; - } - } - } - break; - case GL_ALPHA: - /* replace A with A */ - if (table->FloatTable) { - const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF; - const GLfloat *lut = (const GLfloat *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - GLint j = IROUND((GLfloat) rgba[i][ACOMP] * scale); - GLchan c; - CLAMPED_FLOAT_TO_CHAN(c, lut[j]); - rgba[i][ACOMP] = c; - } - } - else { -#if CHAN_TYPE == GL_UNSIGNED_BYTE - if (table->Size == 256) { - /* common case */ - const GLchan *lut = (const GLchan *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = lut[rgba[i][ACOMP]]; - } - } - else -#endif - { - const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF; - const GLchan *lut = (const GLchan *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - GLint j = IROUND((GLfloat) rgba[i][ACOMP] * scale); - rgba[i][ACOMP] = lut[j]; - } - } - } - break; - case GL_LUMINANCE_ALPHA: - /* replace RGBA with LLLA */ - if (table->FloatTable) { - const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF; - const GLfloat *lut = (const GLfloat *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - GLint jL = IROUND((GLfloat) rgba[i][RCOMP] * scale); - GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale); - GLchan luminance, alpha; - CLAMPED_FLOAT_TO_CHAN(luminance, lut[jL * 2 + 0]); - CLAMPED_FLOAT_TO_CHAN(alpha, lut[jA * 2 + 1]); - rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = luminance; - rgba[i][ACOMP] = alpha;; - } - } - else { -#if CHAN_TYPE == GL_UNSIGNED_BYTE - if (table->Size == 256) { - /* common case */ - const GLchan *lut = (const GLchan *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - GLchan l = lut[rgba[i][RCOMP] * 2 + 0]; - GLchan a = lut[rgba[i][ACOMP] * 2 + 1];; - rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = l; - rgba[i][ACOMP] = a; - } - } - else -#endif - { - const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF; - const GLchan *lut = (const GLchan *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - GLint jL = IROUND((GLfloat) rgba[i][RCOMP] * scale); - GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale); - GLchan luminance = lut[jL * 2 + 0]; - GLchan alpha = lut[jA * 2 + 1]; - rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = luminance; - rgba[i][ACOMP] = alpha; - } - } - } - break; - case GL_RGB: - /* replace RGB with RGB */ - if (table->FloatTable) { - const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF; - const GLfloat *lut = (const GLfloat *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale); - GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale); - GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale); - CLAMPED_FLOAT_TO_CHAN(rgba[i][RCOMP], lut[jR * 3 + 0]); - CLAMPED_FLOAT_TO_CHAN(rgba[i][GCOMP], lut[jG * 3 + 1]); - CLAMPED_FLOAT_TO_CHAN(rgba[i][BCOMP], lut[jB * 3 + 2]); - } - } - else { -#if CHAN_TYPE == GL_UNSIGNED_BYTE - if (table->Size == 256) { - /* common case */ - const GLchan *lut = (const GLchan *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = lut[rgba[i][RCOMP] * 3 + 0]; - rgba[i][GCOMP] = lut[rgba[i][GCOMP] * 3 + 1]; - rgba[i][BCOMP] = lut[rgba[i][BCOMP] * 3 + 2]; - } - } - else -#endif - { - const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF; - const GLchan *lut = (const GLchan *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale); - GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale); - GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale); - rgba[i][RCOMP] = lut[jR * 3 + 0]; - rgba[i][GCOMP] = lut[jG * 3 + 1]; - rgba[i][BCOMP] = lut[jB * 3 + 2]; - } - } - } - break; - case GL_RGBA: - /* replace RGBA with RGBA */ - if (table->FloatTable) { - const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF; - const GLfloat *lut = (const GLfloat *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale); - GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale); - GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale); - GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale); - CLAMPED_FLOAT_TO_CHAN(rgba[i][RCOMP], lut[jR * 4 + 0]); - CLAMPED_FLOAT_TO_CHAN(rgba[i][GCOMP], lut[jG * 4 + 1]); - CLAMPED_FLOAT_TO_CHAN(rgba[i][BCOMP], lut[jB * 4 + 2]); - CLAMPED_FLOAT_TO_CHAN(rgba[i][ACOMP], lut[jA * 4 + 3]); - } - } - else { -#if CHAN_TYPE == GL_UNSIGNED_BYTE - if (table->Size == 256) { - /* common case */ - const GLchan *lut = (const GLchan *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = lut[rgba[i][RCOMP] * 4 + 0]; - rgba[i][GCOMP] = lut[rgba[i][GCOMP] * 4 + 1]; - rgba[i][BCOMP] = lut[rgba[i][BCOMP] * 4 + 2]; - rgba[i][ACOMP] = lut[rgba[i][ACOMP] * 4 + 3]; - } - } - else -#endif - { - const GLfloat scale = (GLfloat) (table->Size - 1) / CHAN_MAXF; - const GLfloat *lut = (const GLfloat *) table->Table; - GLuint i; - for (i = 0; i < n; i++) { - GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale); - GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale); - GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale); - GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale); - CLAMPED_FLOAT_TO_CHAN(rgba[i][RCOMP], lut[jR * 4 + 0]); - CLAMPED_FLOAT_TO_CHAN(rgba[i][GCOMP], lut[jG * 4 + 1]); - CLAMPED_FLOAT_TO_CHAN(rgba[i][BCOMP], lut[jB * 4 + 2]); - CLAMPED_FLOAT_TO_CHAN(rgba[i][ACOMP], lut[jA * 4 + 3]); - } - } - } - break; - default: - _mesa_problem(NULL, "Bad format in _swrast_texture_table_lookup"); - return; - } + /* For 1D array textures, the slices are all 1 pixel high, and Height is + * the number of slices. + */ + if (texImage->TexObject->Target == GL_TEXTURE_1D_ARRAY) + return 1; + else + return texImage->Height; } - - -/* - * Get texture palette entry. +/** + * Called via ctx->Driver.AllocTextureImageBuffer() */ -static void -palette_sample(const GLcontext *ctx, - const struct gl_texture_object *tObj, - GLint index, GLchan rgba[4] ) +GLboolean +_swrast_alloc_texture_image_buffer(struct gl_context *ctx, + struct gl_texture_image *texImage) { - const GLchan *palette; - GLenum format; + struct swrast_texture_image *swImg = swrast_texture_image(texImage); + GLuint bytesPerSlice; + GLuint slices = texture_slices(texImage); + GLuint i; - if (ctx->Texture.SharedPalette) { - ASSERT(!ctx->Texture.Palette.FloatTable); - palette = (const GLchan *) ctx->Texture.Palette.Table; - format = ctx->Texture.Palette.Format; - } - else { - ASSERT(!tObj->Palette.FloatTable); - palette = (const GLchan *) tObj->Palette.Table; - format = tObj->Palette.Format; - } + if (!_swrast_init_texture_image(texImage)) + return GL_FALSE; - switch (format) { - case GL_ALPHA: - rgba[ACOMP] = palette[index]; - return; - case GL_LUMINANCE: - case GL_INTENSITY: - rgba[RCOMP] = palette[index]; - return; - case GL_LUMINANCE_ALPHA: - rgba[RCOMP] = palette[(index << 1) + 0]; - rgba[ACOMP] = palette[(index << 1) + 1]; - return; - case GL_RGB: - rgba[RCOMP] = palette[index * 3 + 0]; - rgba[GCOMP] = palette[index * 3 + 1]; - rgba[BCOMP] = palette[index * 3 + 2]; - return; - case GL_RGBA: - rgba[RCOMP] = palette[(index << 2) + 0]; - rgba[GCOMP] = palette[(index << 2) + 1]; - rgba[BCOMP] = palette[(index << 2) + 2]; - rgba[ACOMP] = palette[(index << 2) + 3]; - return; - default: - _mesa_problem(ctx, "Bad palette format in palette_sample"); - } -} + bytesPerSlice = _mesa_format_image_size(texImage->TexFormat, texImage->Width, + _swrast_teximage_slice_height(texImage), 1); + assert(!swImg->Buffer); + swImg->Buffer = _mesa_align_malloc(bytesPerSlice * slices, 512); + if (!swImg->Buffer) + return GL_FALSE; -/* - * The lambda[] array values are always monotonic. Either the whole span - * will be minified, magnified, or split between the two. This function - * determines the subranges in [0, n-1] that are to be minified or magnified. - */ -static INLINE void -compute_min_mag_ranges( GLfloat minMagThresh, GLuint n, const GLfloat lambda[], - GLuint *minStart, GLuint *minEnd, - GLuint *magStart, GLuint *magEnd ) -{ - ASSERT(lambda != NULL); -#if 0 - /* Verify that lambda[] is monotonous. - * We can't really use this because the inaccuracy in the LOG2 function - * causes this test to fail, yet the resulting texturing is correct. - */ - if (n > 1) { - GLuint i; - printf("lambda delta = %g\n", lambda[0] - lambda[n-1]); - if (lambda[0] >= lambda[n-1]) { /* decreasing */ - for (i = 0; i < n - 1; i++) { - ASSERT((GLint) (lambda[i] * 10) >= (GLint) (lambda[i+1] * 10)); - } - } - else { /* increasing */ - for (i = 0; i < n - 1; i++) { - ASSERT((GLint) (lambda[i] * 10) <= (GLint) (lambda[i+1] * 10)); - } - } - } -#endif /* DEBUG */ + /* RowStride and ImageSlices[] describe how to address texels in 'Data' */ + swImg->RowStride = _mesa_format_row_stride(texImage->TexFormat, + texImage->Width); - /* since lambda is monotonous-array use this check first */ - if (lambda[0] <= minMagThresh && lambda[n-1] <= minMagThresh) { - /* magnification for whole span */ - *magStart = 0; - *magEnd = n; - *minStart = *minEnd = 0; - } - else if (lambda[0] > minMagThresh && lambda[n-1] > minMagThresh) { - /* minification for whole span */ - *minStart = 0; - *minEnd = n; - *magStart = *magEnd = 0; - } - else { - /* a mix of minification and magnification */ - GLuint i; - if (lambda[0] > minMagThresh) { - /* start with minification */ - for (i = 1; i < n; i++) { - if (lambda[i] <= minMagThresh) - break; - } - *minStart = 0; - *minEnd = i; - *magStart = i; - *magEnd = n; - } - else { - /* start with magnification */ - for (i = 1; i < n; i++) { - if (lambda[i] > minMagThresh) - break; - } - *magStart = 0; - *magEnd = i; - *minStart = i; - *minEnd = n; - } + for (i = 0; i < slices; i++) { + swImg->ImageSlices[i] = swImg->Buffer + bytesPerSlice * i; } -#if 0 - /* Verify the min/mag Start/End values - * We don't use this either (see above) - */ - { - GLint i; - for (i = 0; i < n; i++) { - if (lambda[i] > minMagThresh) { - /* minification */ - ASSERT(i >= *minStart); - ASSERT(i < *minEnd); - } - else { - /* magnification */ - ASSERT(i >= *magStart); - ASSERT(i < *magEnd); - } - } - } -#endif + return GL_TRUE; } -/**********************************************************************/ -/* 1-D Texture Sampling Functions */ -/**********************************************************************/ - -/* - * Return the texture sample for coordinate (s) using GL_NEAREST filter. +/** + * Code that overrides ctx->Driver.AllocTextureImageBuffer may use this to + * initialize the fields of swrast_texture_image without allocating the image + * buffer or initializing RowStride or the contents of ImageSlices. + * + * Returns GL_TRUE on success, GL_FALSE on memory allocation failure. */ -static void -sample_1d_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], GLchan rgba[4]) +GLboolean +_swrast_init_texture_image(struct gl_texture_image *texImage) { - const GLint width = img->Width2; /* without border, power of two */ - GLint i; + struct swrast_texture_image *swImg = swrast_texture_image(texImage); - COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapS, texcoord[0], width, i); - - /* skip over the border, if any */ - i += img->Border; + if ((texImage->Width == 1 || _mesa_is_pow_two(texImage->Width2)) && + (texImage->Height == 1 || _mesa_is_pow_two(texImage->Height2)) && + (texImage->Depth == 1 || _mesa_is_pow_two(texImage->Depth2))) + swImg->_IsPowerOfTwo = GL_TRUE; + else + swImg->_IsPowerOfTwo = GL_FALSE; - if (i < 0 || i >= (GLint) img->Width) { - /* Need this test for GL_CLAMP_TO_BORDER mode */ - COPY_CHAN4(rgba, tObj->_BorderChan); + /* Compute Width/Height/DepthScale for mipmap lod computation */ + if (texImage->TexObject->Target == GL_TEXTURE_RECTANGLE_NV) { + /* scale = 1.0 since texture coords directly map to texels */ + swImg->WidthScale = 1.0; + swImg->HeightScale = 1.0; + swImg->DepthScale = 1.0; } else { - (*img->FetchTexel)(img, i, 0, 0, (GLvoid *) rgba); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, rgba[0], rgba); - } + swImg->WidthScale = (GLfloat) texImage->Width; + swImg->HeightScale = (GLfloat) texImage->Height; + swImg->DepthScale = (GLfloat) texImage->Depth; } -} + assert(!swImg->ImageSlices); + swImg->ImageSlices = calloc(texture_slices(texImage), sizeof(void *)); + if (!swImg->ImageSlices) + return GL_FALSE; + return GL_TRUE; +} -/* - * Return the texture sample for coordinate (s) using GL_LINEAR filter. + +/** + * Called via ctx->Driver.FreeTextureImageBuffer() */ -static void -sample_1d_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], GLchan rgba[4]) +void +_swrast_free_texture_image_buffer(struct gl_context *ctx, + struct gl_texture_image *texImage) { - const GLint width = img->Width2; - GLint i0, i1; - GLfloat u; - GLuint useBorderColor; - - COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapS, texcoord[0], u, width, i0, i1); - - useBorderColor = 0; - if (img->Border) { - i0 += img->Border; - i1 += img->Border; - } - else { - if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT; - if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT; - } - - { - const GLfloat a = FRAC(u); - -#if CHAN_TYPE == GL_FLOAT || CHAN_TYPE == GL_UNSIGNED_SHORT - const GLfloat w0 = (1.0F-a); - const GLfloat w1 = a ; -#else /* CHAN_BITS == 8 */ - /* compute sample weights in fixed point in [0,WEIGHT_SCALE] */ - const GLint w0 = IROUND_POS((1.0F - a) * WEIGHT_SCALE); - const GLint w1 = IROUND_POS( a * WEIGHT_SCALE); -#endif - GLchan t0[4], t1[4]; /* texels */ - - if (useBorderColor & I0BIT) { - COPY_CHAN4(t0, tObj->_BorderChan); - } - else { - (*img->FetchTexel)(img, i0, 0, 0, (GLvoid *) t0); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, t0[0], t0); - } - } - if (useBorderColor & I1BIT) { - COPY_CHAN4(t1, tObj->_BorderChan); - } - else { - (*img->FetchTexel)(img, i1, 0, 0, (GLvoid *) t1); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, t1[0], t1); - } - } + struct swrast_texture_image *swImage = swrast_texture_image(texImage); -#if CHAN_TYPE == GL_FLOAT - rgba[0] = w0 * t0[0] + w1 * t1[0]; - rgba[1] = w0 * t0[1] + w1 * t1[1]; - rgba[2] = w0 * t0[2] + w1 * t1[2]; - rgba[3] = w0 * t0[3] + w1 * t1[3]; -#elif CHAN_TYPE == GL_UNSIGNED_SHORT - rgba[0] = (GLchan) (w0 * t0[0] + w1 * t1[0] + 0.5); - rgba[1] = (GLchan) (w0 * t0[1] + w1 * t1[1] + 0.5); - rgba[2] = (GLchan) (w0 * t0[2] + w1 * t1[2] + 0.5); - rgba[3] = (GLchan) (w0 * t0[3] + w1 * t1[3] + 0.5); -#else /* CHAN_BITS == 8 */ - rgba[0] = (GLchan) ((w0 * t0[0] + w1 * t1[0]) >> WEIGHT_SHIFT); - rgba[1] = (GLchan) ((w0 * t0[1] + w1 * t1[1]) >> WEIGHT_SHIFT); - rgba[2] = (GLchan) ((w0 * t0[2] + w1 * t1[2]) >> WEIGHT_SHIFT); - rgba[3] = (GLchan) ((w0 * t0[3] + w1 * t1[3]) >> WEIGHT_SHIFT); -#endif + _mesa_align_free(swImage->Buffer); + swImage->Buffer = NULL; - } + free(swImage->ImageSlices); + swImage->ImageSlices = NULL; } +/** + * Error checking for debugging only. + */ static void -sample_1d_nearest_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4]) +check_map_teximage(const struct gl_texture_image *texImage, + GLuint slice, GLuint x, GLuint y, GLuint w, GLuint h) { - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level; - COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda[i], level); - sample_1d_nearest(ctx, tObj, tObj->Image[level], texcoord[i], rgba[i]); - } -} + if (texImage->TexObject->Target == GL_TEXTURE_1D) + assert(y == 0 && h == 1); -static void -sample_1d_linear_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level; - COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda[i], level); - sample_1d_linear(ctx, tObj, tObj->Image[level], texcoord[i], rgba[i]); - } + assert(x < texImage->Width || texImage->Width == 0); + assert(y < texImage->Height || texImage->Height == 0); + assert(x + w <= texImage->Width); + assert(y + h <= texImage->Height); + assert(slice < texture_slices(texImage)); } - - -/* - * This is really just needed in order to prevent warnings with some compilers. +/** + * Map a 2D slice of a texture image into user space. + * (x,y,w,h) defines a region of interest (ROI). Reading/writing texels + * outside of the ROI is undefined. + * + * \param texImage the texture image + * \param slice the 3D image slice or array texture slice + * \param x, y, w, h region of interest + * \param mode bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT + * \param mapOut returns start of mapping of region of interest + * \param rowStrideOut returns row stride (in bytes) */ -#if CHAN_TYPE == GL_FLOAT -#define CHAN_CAST -#else -#define CHAN_CAST (GLchan) (GLint) -#endif - - -static void -sample_1d_nearest_mipmap_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level; - COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level); - if (level >= tObj->_MaxLevel) { - sample_1d_nearest(ctx, tObj, tObj->Image[tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLchan t0[4], t1[4]; - const GLfloat f = FRAC(lambda[i]); - sample_1d_nearest(ctx, tObj, tObj->Image[level ], texcoord[i], t0); - sample_1d_nearest(ctx, tObj, tObj->Image[level+1], texcoord[i], t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); - } +void +_swrast_map_teximage(struct gl_context *ctx, + struct gl_texture_image *texImage, + GLuint slice, + GLuint x, GLuint y, GLuint w, GLuint h, + GLbitfield mode, + GLubyte **mapOut, + GLint *rowStrideOut) +{ + struct swrast_texture_image *swImage = swrast_texture_image(texImage); + GLubyte *map; + GLint stride, texelSize; + GLuint bw, bh; + + check_map_teximage(texImage, slice, x, y, w, h); + + if (!swImage->Buffer) { + /* Either glTexImage was called with a NULL argument or + * we ran out of memory when allocating texture memory, + */ + *mapOut = NULL; + *rowStrideOut = 0; + return; } -} + texelSize = _mesa_get_format_bytes(texImage->TexFormat); + stride = _mesa_format_row_stride(texImage->TexFormat, texImage->Width); + _mesa_get_format_block_size(texImage->TexFormat, &bw, &bh); + assert(x % bw == 0); + assert(y % bh == 0); -static void -sample_1d_linear_mipmap_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level; - COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level); - if (level >= tObj->_MaxLevel) { - sample_1d_linear(ctx, tObj, tObj->Image[tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLchan t0[4], t1[4]; - const GLfloat f = FRAC(lambda[i]); - sample_1d_linear(ctx, tObj, tObj->Image[level ], texcoord[i], t0); - sample_1d_linear(ctx, tObj, tObj->Image[level+1], texcoord[i], t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); - } - } -} + /* This function can only be used with a swrast-allocated buffer, in which + * case ImageSlices is populated with pointers into Buffer. + */ + assert(swImage->Buffer); + assert(swImage->Buffer == swImage->ImageSlices[0]); + map = swImage->ImageSlices[slice]; + /* apply x/y offset to map address */ + map += stride * (y / bh) + texelSize * (x / bw); -static void -sample_nearest_1d( GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLchan rgba[][4] ) -{ - GLuint i; - struct gl_texture_image *image = tObj->Image[tObj->BaseLevel]; - (void) lambda; - for (i=0;iImage[tObj->BaseLevel]; - (void) lambda; - for (i=0;i_MinMagThresh[texUnit], - n, lambda, &minStart, &minEnd, &magStart, &magEnd); + const GLuint faces = _mesa_num_tex_faces(texObj->Target); + GLuint face, level; - if (minStart < minEnd) { - /* do the minified texels */ - const GLuint m = minEnd - minStart; - switch (tObj->MinFilter) { - case GL_NEAREST: - for (i = minStart; i < minEnd; i++) - sample_1d_nearest(ctx, tObj, tObj->Image[tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_LINEAR: - for (i = minStart; i < minEnd; i++) - sample_1d_linear(ctx, tObj, tObj->Image[tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_NEAREST_MIPMAP_NEAREST: - sample_1d_nearest_mipmap_nearest(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_NEAREST: - sample_1d_linear_mipmap_nearest(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_NEAREST_MIPMAP_LINEAR: - sample_1d_nearest_mipmap_linear(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_LINEAR: - sample_1d_linear_mipmap_linear(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - default: - _mesa_problem(ctx, "Bad min filter in sample_1d_texture"); - return; - } - } + for (face = 0; face < faces; face++) { + for (level = texObj->BaseLevel; level < MAX_TEXTURE_LEVELS; level++) { + struct gl_texture_image *texImage = texObj->Image[face][level]; + struct swrast_texture_image *swImage = swrast_texture_image(texImage); + unsigned int i, slices; - if (magStart < magEnd) { - /* do the magnified texels */ - switch (tObj->MagFilter) { - case GL_NEAREST: - for (i = magStart; i < magEnd; i++) - sample_1d_nearest(ctx, tObj, tObj->Image[tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_LINEAR: - for (i = magStart; i < magEnd; i++) - sample_1d_linear(ctx, tObj, tObj->Image[tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - default: - _mesa_problem(ctx, "Bad mag filter in sample_1d_texture"); - return; - } - } -} + if (!texImage) + continue; + /* In the case of a swrast-allocated texture buffer, the ImageSlices + * and RowStride are always available. + */ + if (swImage->Buffer) { + assert(swImage->ImageSlices[0] == swImage->Buffer); + continue; + } -/**********************************************************************/ -/* 2-D Texture Sampling Functions */ -/**********************************************************************/ + if (!swImage->ImageSlices) { + swImage->ImageSlices = + calloc(texture_slices(texImage), sizeof(void *)); + if (!swImage->ImageSlices) + continue; + } + slices = texture_slices(texImage); -/* - * Return the texture sample for coordinate (s,t) using GL_NEAREST filter. - */ -static INLINE void -sample_2d_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], - GLchan rgba[]) -{ - const GLint width = img->Width2; /* without border, power of two */ - const GLint height = img->Height2; /* without border, power of two */ - GLint i, j; + for (i = 0; i < slices; i++) { + GLubyte *map; + GLint rowStride; - COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapS, texcoord[0], width, i); - COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapT, texcoord[1], height, j); + if (swImage->ImageSlices[i]) + continue; - /* skip over the border, if any */ - i += img->Border; - j += img->Border; + ctx->Driver.MapTextureImage(ctx, texImage, i, + 0, 0, + texImage->Width, texImage->Height, + GL_MAP_READ_BIT | GL_MAP_WRITE_BIT, + &map, &rowStride); - if (i < 0 || i >= (GLint) img->Width || j < 0 || j >= (GLint) img->Height) { - /* Need this test for GL_CLAMP_TO_BORDER mode */ - COPY_CHAN4(rgba, tObj->_BorderChan); - } - else { - (*img->FetchTexel)(img, i, j, 0, (GLvoid *) rgba); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, rgba[0], rgba); + swImage->ImageSlices[i] = map; + /* A swrast-using driver has to return the same rowstride for + * every slice of the same texture, since we don't track them + * separately. + */ + if (i == 0) + swImage->RowStride = rowStride; + else + assert(swImage->RowStride == rowStride); + } } } } - -/* - * Return the texture sample for coordinate (s,t) using GL_LINEAR filter. - * New sampling code contributed by Lynn Quam . - */ -static INLINE void -sample_2d_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], - GLchan rgba[]) +void +_swrast_unmap_texture(struct gl_context *ctx, struct gl_texture_object *texObj) { - const GLint width = img->Width2; - const GLint height = img->Height2; - GLint i0, j0, i1, j1; - GLuint useBorderColor; - GLfloat u, v; + const GLuint faces = _mesa_num_tex_faces(texObj->Target); + GLuint face, level; - COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapS, texcoord[0], u, width, i0, i1); - COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapT, texcoord[1], v, height, j0, j1); + for (face = 0; face < faces; face++) { + for (level = texObj->BaseLevel; level < MAX_TEXTURE_LEVELS; level++) { + struct gl_texture_image *texImage = texObj->Image[face][level]; + struct swrast_texture_image *swImage = swrast_texture_image(texImage); + unsigned int i, slices; - useBorderColor = 0; - if (img->Border) { - i0 += img->Border; - i1 += img->Border; - j0 += img->Border; - j1 += img->Border; - } - else { - if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT; - if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT; - if (j0 < 0 || j0 >= height) useBorderColor |= J0BIT; - if (j1 < 0 || j1 >= height) useBorderColor |= J1BIT; - } + if (!texImage) + continue; - { - const GLfloat a = FRAC(u); - const GLfloat b = FRAC(v); + if (swImage->Buffer) + return; -#if CHAN_TYPE == GL_FLOAT || CHAN_TYPE == GL_UNSIGNED_SHORT - const GLfloat w00 = (1.0F-a) * (1.0F-b); - const GLfloat w10 = a * (1.0F-b); - const GLfloat w01 = (1.0F-a) * b ; - const GLfloat w11 = a * b ; -#else /* CHAN_BITS == 8 */ - /* compute sample weights in fixed point in [0,WEIGHT_SCALE] */ - const GLint w00 = IROUND_POS((1.0F-a) * (1.0F-b) * WEIGHT_SCALE); - const GLint w10 = IROUND_POS( a * (1.0F-b) * WEIGHT_SCALE); - const GLint w01 = IROUND_POS((1.0F-a) * b * WEIGHT_SCALE); - const GLint w11 = IROUND_POS( a * b * WEIGHT_SCALE); -#endif - GLchan t00[4]; - GLchan t10[4]; - GLchan t01[4]; - GLchan t11[4]; + if (!swImage->ImageSlices) + continue; - if (useBorderColor & (I0BIT | J0BIT)) { - COPY_CHAN4(t00, tObj->_BorderChan); - } - else { - (*img->FetchTexel)(img, i0, j0, 0, (GLvoid *) t00); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, t00[0], t00); - } - } - if (useBorderColor & (I1BIT | J0BIT)) { - COPY_CHAN4(t10, tObj->_BorderChan); - } - else { - (*img->FetchTexel)(img, i1, j0, 0, (GLvoid *) t10); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, t10[0], t10); - } - } - if (useBorderColor & (I0BIT | J1BIT)) { - COPY_CHAN4(t01, tObj->_BorderChan); - } - else { - (*img->FetchTexel)(img, i0, j1, 0, (GLvoid *) t01); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, t01[0], t01); - } - } - if (useBorderColor & (I1BIT | J1BIT)) { - COPY_CHAN4(t11, tObj->_BorderChan); - } - else { - (*img->FetchTexel)(img, i1, j1, 0, (GLvoid *) t11); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, t11[0], t11); + slices = texture_slices(texImage); + + for (i = 0; i < slices; i++) { + if (swImage->ImageSlices[i]) { + ctx->Driver.UnmapTextureImage(ctx, texImage, i); + swImage->ImageSlices[i] = NULL; + } } } -#if CHAN_TYPE == GL_FLOAT - rgba[0] = w00 * t00[0] + w10 * t10[0] + w01 * t01[0] + w11 * t11[0]; - rgba[1] = w00 * t00[1] + w10 * t10[1] + w01 * t01[1] + w11 * t11[1]; - rgba[2] = w00 * t00[2] + w10 * t10[2] + w01 * t01[2] + w11 * t11[2]; - rgba[3] = w00 * t00[3] + w10 * t10[3] + w01 * t01[3] + w11 * t11[3]; -#elif CHAN_TYPE == GL_UNSIGNED_SHORT - rgba[0] = (GLchan) (w00 * t00[0] + w10 * t10[0] + - w01 * t01[0] + w11 * t11[0] + 0.5); - rgba[1] = (GLchan) (w00 * t00[1] + w10 * t10[1] + - w01 * t01[1] + w11 * t11[1] + 0.5); - rgba[2] = (GLchan) (w00 * t00[2] + w10 * t10[2] + - w01 * t01[2] + w11 * t11[2] + 0.5); - rgba[3] = (GLchan) (w00 * t00[3] + w10 * t10[3] + - w01 * t01[3] + w11 * t11[3] + 0.5); -#else /* CHAN_BITS == 8 */ - rgba[0] = (GLchan) ((w00 * t00[0] + w10 * t10[0] + - w01 * t01[0] + w11 * t11[0]) >> WEIGHT_SHIFT); - rgba[1] = (GLchan) ((w00 * t00[1] + w10 * t10[1] + - w01 * t01[1] + w11 * t11[1]) >> WEIGHT_SHIFT); - rgba[2] = (GLchan) ((w00 * t00[2] + w10 * t10[2] + - w01 * t01[2] + w11 * t11[2]) >> WEIGHT_SHIFT); - rgba[3] = (GLchan) ((w00 * t00[3] + w10 * t10[3] + - w01 * t01[3] + w11 * t11[3]) >> WEIGHT_SHIFT); -#endif - } - } -/* - * As above, but we know WRAP_S == REPEAT and WRAP_T == REPEAT - * and we're not using a paletted texture. +/** + * Map all textures for reading prior to software rendering. */ -static INLINE void -sample_2d_linear_repeat(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], - GLchan rgba[]) +void +_swrast_map_textures(struct gl_context *ctx) { - const GLint width = img->Width2; - const GLint height = img->Height2; - GLint i0, j0, i1, j1; - GLfloat u, v; - - ASSERT(tObj->WrapS == GL_REPEAT); - ASSERT(tObj->WrapT == GL_REPEAT); - ASSERT(img->Border == 0); - ASSERT(img->Format != GL_COLOR_INDEX); - ASSERT(img->_IsPowerOfTwo); - - COMPUTE_LINEAR_REPEAT_TEXEL_LOCATION(texcoord[0], u, width, i0, i1); - COMPUTE_LINEAR_REPEAT_TEXEL_LOCATION(texcoord[1], v, height, j0, j1); + int unit; - { - const GLfloat a = FRAC(u); - const GLfloat b = FRAC(v); - -#if CHAN_TYPE == GL_FLOAT || CHAN_TYPE == GL_UNSIGNED_SHORT - const GLfloat w00 = (1.0F-a) * (1.0F-b); - const GLfloat w10 = a * (1.0F-b); - const GLfloat w01 = (1.0F-a) * b ; - const GLfloat w11 = a * b ; -#else /* CHAN_BITS == 8 */ - /* compute sample weights in fixed point in [0,WEIGHT_SCALE] */ - const GLint w00 = IROUND_POS((1.0F-a) * (1.0F-b) * WEIGHT_SCALE); - const GLint w10 = IROUND_POS( a * (1.0F-b) * WEIGHT_SCALE); - const GLint w01 = IROUND_POS((1.0F-a) * b * WEIGHT_SCALE); - const GLint w11 = IROUND_POS( a * b * WEIGHT_SCALE); -#endif - GLchan t00[4]; - GLchan t10[4]; - GLchan t01[4]; - GLchan t11[4]; - - (*img->FetchTexel)(img, i0, j0, 0, (GLvoid *) t00); - (*img->FetchTexel)(img, i1, j0, 0, (GLvoid *) t10); - (*img->FetchTexel)(img, i0, j1, 0, (GLvoid *) t01); - (*img->FetchTexel)(img, i1, j1, 0, (GLvoid *) t11); - -#if CHAN_TYPE == GL_FLOAT - rgba[0] = w00 * t00[0] + w10 * t10[0] + w01 * t01[0] + w11 * t11[0]; - rgba[1] = w00 * t00[1] + w10 * t10[1] + w01 * t01[1] + w11 * t11[1]; - rgba[2] = w00 * t00[2] + w10 * t10[2] + w01 * t01[2] + w11 * t11[2]; - rgba[3] = w00 * t00[3] + w10 * t10[3] + w01 * t01[3] + w11 * t11[3]; -#elif CHAN_TYPE == GL_UNSIGNED_SHORT - rgba[0] = (GLchan) (w00 * t00[0] + w10 * t10[0] + - w01 * t01[0] + w11 * t11[0] + 0.5); - rgba[1] = (GLchan) (w00 * t00[1] + w10 * t10[1] + - w01 * t01[1] + w11 * t11[1] + 0.5); - rgba[2] = (GLchan) (w00 * t00[2] + w10 * t10[2] + - w01 * t01[2] + w11 * t11[2] + 0.5); - rgba[3] = (GLchan) (w00 * t00[3] + w10 * t10[3] + - w01 * t01[3] + w11 * t11[3] + 0.5); -#else /* CHAN_BITS == 8 */ - rgba[0] = (GLchan) ((w00 * t00[0] + w10 * t10[0] + - w01 * t01[0] + w11 * t11[0]) >> WEIGHT_SHIFT); - rgba[1] = (GLchan) ((w00 * t00[1] + w10 * t10[1] + - w01 * t01[1] + w11 * t11[1]) >> WEIGHT_SHIFT); - rgba[2] = (GLchan) ((w00 * t00[2] + w10 * t10[2] + - w01 * t01[2] + w11 * t11[2]) >> WEIGHT_SHIFT); - rgba[3] = (GLchan) ((w00 * t00[3] + w10 * t10[3] + - w01 * t01[3] + w11 * t11[3]) >> WEIGHT_SHIFT); -#endif + for (unit = 0; unit <= ctx->Texture._MaxEnabledTexImageUnit; unit++) { + struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current; + if (texObj) + _swrast_map_texture(ctx, texObj); } - } - -static void -sample_2d_nearest_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4]) +/** + * Unmap all textures for reading prior to software rendering. + */ +void +_swrast_unmap_textures(struct gl_context *ctx) { - GLuint i; - for (i = 0; i < n; i++) { - GLint level; - COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda[i], level); - sample_2d_nearest(ctx, tObj, tObj->Image[level], texcoord[i], rgba[i]); - } -} + int unit; + for (unit = 0; unit <= ctx->Texture._MaxEnabledTexImageUnit; unit++) { + struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current; - - -static void -sample_2d_linear_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level; - COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda[i], level); - sample_2d_linear(ctx, tObj, tObj->Image[level], texcoord[i], rgba[i]); - } -} - - - -static void -sample_2d_nearest_mipmap_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level; - COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level); - if (level >= tObj->_MaxLevel) { - sample_2d_nearest(ctx, tObj, tObj->Image[tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLchan t0[4], t1[4]; /* texels */ - const GLfloat f = FRAC(lambda[i]); - sample_2d_nearest(ctx, tObj, tObj->Image[level ], texcoord[i], t0); - sample_2d_nearest(ctx, tObj, tObj->Image[level+1], texcoord[i], t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); - } - } -} - - - -/* Trilinear filtering */ -static void -sample_2d_linear_mipmap_linear( GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4] ) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level; - COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level); - if (level >= tObj->_MaxLevel) { - sample_2d_linear(ctx, tObj, tObj->Image[tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLchan t0[4], t1[4]; /* texels */ - const GLfloat f = FRAC(lambda[i]); - sample_2d_linear(ctx, tObj, tObj->Image[level ], texcoord[i], t0); - sample_2d_linear(ctx, tObj, tObj->Image[level+1], texcoord[i], t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); - } - } -} - - -static void -sample_2d_linear_mipmap_linear_repeat( GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4] ) -{ - GLuint i; - ASSERT(lambda != NULL); - ASSERT(tObj->WrapS == GL_REPEAT); - ASSERT(tObj->WrapT == GL_REPEAT); - ASSERT(tObj->_IsPowerOfTwo); - for (i = 0; i < n; i++) { - GLint level; - COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level); - if (level >= tObj->_MaxLevel) { - sample_2d_linear_repeat(ctx, tObj, tObj->Image[tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLchan t0[4], t1[4]; /* texels */ - const GLfloat f = FRAC(lambda[i]); - sample_2d_linear_repeat(ctx, tObj, tObj->Image[level ], texcoord[i], t0); - sample_2d_linear_repeat(ctx, tObj, tObj->Image[level+1], texcoord[i], t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); - } - } -} - - -static void -sample_nearest_2d( GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], - const GLfloat lambda[], GLchan rgba[][4] ) -{ - GLuint i; - struct gl_texture_image *image = tObj->Image[tObj->BaseLevel]; - (void) lambda; - for (i=0;iImage[tObj->BaseLevel]; - (void) lambda; - for (i=0;iImage[tObj->BaseLevel]; - const GLfloat width = (GLfloat) img->Width; - const GLfloat height = (GLfloat) img->Height; - const GLint colMask = img->Width - 1; - const GLint rowMask = img->Height - 1; - const GLint shift = img->WidthLog2; - GLuint k; - (void) lambda; - ASSERT(tObj->WrapS==GL_REPEAT); - ASSERT(tObj->WrapT==GL_REPEAT); - ASSERT(img->Border==0); - ASSERT(img->Format==GL_RGB); - ASSERT(img->_IsPowerOfTwo); - - for (k=0; kData) + 3*pos; - rgba[k][RCOMP] = texel[0]; - rgba[k][GCOMP] = texel[1]; - rgba[k][BCOMP] = texel[2]; - } -} - - -/* - * Optimized 2-D texture sampling: - * S and T wrap mode == GL_REPEAT - * GL_NEAREST min/mag filter - * No border - * RowStride == Width, - * Format = GL_RGBA - */ -static void -opt_sample_rgba_2d( GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoords[][4], - const GLfloat lambda[], GLchan rgba[][4] ) -{ - const struct gl_texture_image *img = tObj->Image[tObj->BaseLevel]; - const GLfloat width = (GLfloat) img->Width; - const GLfloat height = (GLfloat) img->Height; - const GLint colMask = img->Width - 1; - const GLint rowMask = img->Height - 1; - const GLint shift = img->WidthLog2; - GLuint i; - (void) lambda; - ASSERT(tObj->WrapS==GL_REPEAT); - ASSERT(tObj->WrapT==GL_REPEAT); - ASSERT(img->Border==0); - ASSERT(img->Format==GL_RGBA); - ASSERT(img->_IsPowerOfTwo); - - for (i = 0; i < n; i++) { - const GLint col = IFLOOR(texcoords[i][0] * width) & colMask; - const GLint row = IFLOOR(texcoords[i][1] * height) & rowMask; - const GLint pos = (row << shift) | col; - const GLchan *texel = ((GLchan *) img->Data) + (pos << 2); /* pos*4 */ - COPY_CHAN4(rgba[i], texel); - } -} - - -/* - * Given an array of texture coordinate and lambda (level of detail) - * values, return an array of texture sample. - */ -static void -sample_lambda_2d( GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoords[][4], - const GLfloat lambda[], GLchan rgba[][4] ) -{ - const struct gl_texture_image *tImg = tObj->Image[tObj->BaseLevel]; - GLuint minStart, minEnd; /* texels with minification */ - GLuint magStart, magEnd; /* texels with magnification */ - - const GLboolean repeatNoBorderPOT = (tObj->WrapS == GL_REPEAT) - && (tObj->WrapT == GL_REPEAT) - && (tImg->Border == 0 && (tImg->Width == tImg->RowStride)) - && (tImg->Format != GL_COLOR_INDEX) - && tImg->_IsPowerOfTwo; - - ASSERT(lambda != NULL); - compute_min_mag_ranges(SWRAST_CONTEXT(ctx)->_MinMagThresh[texUnit], - n, lambda, &minStart, &minEnd, &magStart, &magEnd); - - if (minStart < minEnd) { - /* do the minified texels */ - const GLuint m = minEnd - minStart; - switch (tObj->MinFilter) { - case GL_NEAREST: - if (repeatNoBorderPOT) { - switch (tImg->Format) { - case GL_RGB: - opt_sample_rgb_2d(ctx, texUnit, tObj, m, texcoords + minStart, - NULL, rgba + minStart); - break; - case GL_RGBA: - opt_sample_rgba_2d(ctx, texUnit, tObj, m, texcoords + minStart, - NULL, rgba + minStart); - break; - default: - sample_nearest_2d(ctx, texUnit, tObj, m, texcoords + minStart, - NULL, rgba + minStart ); - } - } - else { - sample_nearest_2d(ctx, texUnit, tObj, m, texcoords + minStart, - NULL, rgba + minStart); - } - break; - case GL_LINEAR: - sample_linear_2d(ctx, texUnit, tObj, m, texcoords + minStart, - NULL, rgba + minStart); - break; - case GL_NEAREST_MIPMAP_NEAREST: - sample_2d_nearest_mipmap_nearest(ctx, tObj, m, - texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_NEAREST: - sample_2d_linear_mipmap_nearest(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_NEAREST_MIPMAP_LINEAR: - sample_2d_nearest_mipmap_linear(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_LINEAR: - if (repeatNoBorderPOT) - sample_2d_linear_mipmap_linear_repeat(ctx, tObj, m, - texcoords + minStart, lambda + minStart, rgba + minStart); - else - sample_2d_linear_mipmap_linear(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - default: - _mesa_problem(ctx, "Bad min filter in sample_2d_texture"); - return; - } - } - - if (magStart < magEnd) { - /* do the magnified texels */ - const GLuint m = magEnd - magStart; - - switch (tObj->MagFilter) { - case GL_NEAREST: - if (repeatNoBorderPOT) { - switch (tImg->Format) { - case GL_RGB: - opt_sample_rgb_2d(ctx, texUnit, tObj, m, texcoords + magStart, - NULL, rgba + magStart); - break; - case GL_RGBA: - opt_sample_rgba_2d(ctx, texUnit, tObj, m, texcoords + magStart, - NULL, rgba + magStart); - break; - default: - sample_nearest_2d(ctx, texUnit, tObj, m, texcoords + magStart, - NULL, rgba + magStart ); - } - } - else { - sample_nearest_2d(ctx, texUnit, tObj, m, texcoords + magStart, - NULL, rgba + magStart); - } - break; - case GL_LINEAR: - sample_linear_2d(ctx, texUnit, tObj, m, texcoords + magStart, - NULL, rgba + magStart); - break; - default: - _mesa_problem(ctx, "Bad mag filter in sample_lambda_2d"); - } - } -} - - - -/**********************************************************************/ -/* 3-D Texture Sampling Functions */ -/**********************************************************************/ - -/* - * Return the texture sample for coordinate (s,t,r) using GL_NEAREST filter. - */ -static void -sample_3d_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], - GLchan rgba[4]) -{ - const GLint width = img->Width2; /* without border, power of two */ - const GLint height = img->Height2; /* without border, power of two */ - const GLint depth = img->Depth2; /* without border, power of two */ - GLint i, j, k; - - COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapS, texcoord[0], width, i); - COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapT, texcoord[1], height, j); - COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapR, texcoord[2], depth, k); - - if (i < 0 || i >= (GLint) img->Width || - j < 0 || j >= (GLint) img->Height || - k < 0 || k >= (GLint) img->Depth) { - /* Need this test for GL_CLAMP_TO_BORDER mode */ - COPY_CHAN4(rgba, tObj->_BorderChan); - } - else { - (*img->FetchTexel)(img, i, j, k, (GLvoid *) rgba); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, rgba[0], rgba); - } - } -} - - - -/* - * Return the texture sample for coordinate (s,t,r) using GL_LINEAR filter. - */ -static void -sample_3d_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - const struct gl_texture_image *img, - const GLfloat texcoord[4], - GLchan rgba[4]) -{ - const GLint width = img->Width2; - const GLint height = img->Height2; - const GLint depth = img->Depth2; - GLint i0, j0, k0, i1, j1, k1; - GLuint useBorderColor; - GLfloat u, v, w; - - COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapS, texcoord[0], u, width, i0, i1); - COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapT, texcoord[1], v, height, j0, j1); - COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapR, texcoord[2], w, depth, k0, k1); - - useBorderColor = 0; - if (img->Border) { - i0 += img->Border; - i1 += img->Border; - j0 += img->Border; - j1 += img->Border; - k0 += img->Border; - k1 += img->Border; - } - else { - /* check if sampling texture border color */ - if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT; - if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT; - if (j0 < 0 || j0 >= height) useBorderColor |= J0BIT; - if (j1 < 0 || j1 >= height) useBorderColor |= J1BIT; - if (k0 < 0 || k0 >= depth) useBorderColor |= K0BIT; - if (k1 < 0 || k1 >= depth) useBorderColor |= K1BIT; - } - - { - const GLfloat a = FRAC(u); - const GLfloat b = FRAC(v); - const GLfloat c = FRAC(w); - -#if CHAN_TYPE == GL_FLOAT || CHAN_TYPE == GL_UNSIGNED_SHORT - /* compute sample weights in fixed point in [0,WEIGHT_SCALE] */ - GLfloat w000 = (1.0F-a) * (1.0F-b) * (1.0F-c); - GLfloat w100 = a * (1.0F-b) * (1.0F-c); - GLfloat w010 = (1.0F-a) * b * (1.0F-c); - GLfloat w110 = a * b * (1.0F-c); - GLfloat w001 = (1.0F-a) * (1.0F-b) * c ; - GLfloat w101 = a * (1.0F-b) * c ; - GLfloat w011 = (1.0F-a) * b * c ; - GLfloat w111 = a * b * c ; -#else /* CHAN_BITS == 8 */ - /* compute sample weights in fixed point in [0,WEIGHT_SCALE] */ - GLint w000 = IROUND_POS((1.0F-a) * (1.0F-b) * (1.0F-c) * WEIGHT_SCALE); - GLint w100 = IROUND_POS( a * (1.0F-b) * (1.0F-c) * WEIGHT_SCALE); - GLint w010 = IROUND_POS((1.0F-a) * b * (1.0F-c) * WEIGHT_SCALE); - GLint w110 = IROUND_POS( a * b * (1.0F-c) * WEIGHT_SCALE); - GLint w001 = IROUND_POS((1.0F-a) * (1.0F-b) * c * WEIGHT_SCALE); - GLint w101 = IROUND_POS( a * (1.0F-b) * c * WEIGHT_SCALE); - GLint w011 = IROUND_POS((1.0F-a) * b * c * WEIGHT_SCALE); - GLint w111 = IROUND_POS( a * b * c * WEIGHT_SCALE); -#endif - - GLchan t000[4], t010[4], t001[4], t011[4]; - GLchan t100[4], t110[4], t101[4], t111[4]; - - if (useBorderColor & (I0BIT | J0BIT | K0BIT)) { - COPY_CHAN4(t000, tObj->_BorderChan); - } - else { - (*img->FetchTexel)(img, i0, j0, k0, (GLvoid *) t000); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, t000[0], t000); - } - } - if (useBorderColor & (I1BIT | J0BIT | K0BIT)) { - COPY_CHAN4(t100, tObj->_BorderChan); - } - else { - (*img->FetchTexel)(img, i1, j0, k0, (GLvoid *) t100); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, t100[0], t100); - } - } - if (useBorderColor & (I0BIT | J1BIT | K0BIT)) { - COPY_CHAN4(t010, tObj->_BorderChan); - } - else { - (*img->FetchTexel)(img, i0, j1, k0, (GLvoid *) t010); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, t010[0], t010); - } - } - if (useBorderColor & (I1BIT | J1BIT | K0BIT)) { - COPY_CHAN4(t110, tObj->_BorderChan); - } - else { - (*img->FetchTexel)(img, i1, j1, k0, (GLvoid *) t110); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, t110[0], t110); - } - } - - if (useBorderColor & (I0BIT | J0BIT | K1BIT)) { - COPY_CHAN4(t001, tObj->_BorderChan); - } - else { - (*img->FetchTexel)(img, i0, j0, k1, (GLvoid *) t001); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, t001[0], t001); - } - } - if (useBorderColor & (I1BIT | J0BIT | K1BIT)) { - COPY_CHAN4(t101, tObj->_BorderChan); - } - else { - (*img->FetchTexel)(img, i1, j0, k1, (GLvoid *) t101); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, t101[0], t101); - } - } - if (useBorderColor & (I0BIT | J1BIT | K1BIT)) { - COPY_CHAN4(t011, tObj->_BorderChan); - } - else { - (*img->FetchTexel)(img, i0, j1, k1, (GLvoid *) t011); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, t011[0], t011); - } - } - if (useBorderColor & (I1BIT | J1BIT | K1BIT)) { - COPY_CHAN4(t111, tObj->_BorderChan); - } - else { - (*img->FetchTexel)(img, i1, j1, k1, (GLvoid *) t111); - if (img->Format == GL_COLOR_INDEX) { - palette_sample(ctx, tObj, t111[0], t111); - } - } - -#if CHAN_TYPE == GL_FLOAT - rgba[0] = w000*t000[0] + w010*t010[0] + w001*t001[0] + w011*t011[0] + - w100*t100[0] + w110*t110[0] + w101*t101[0] + w111*t111[0]; - rgba[1] = w000*t000[1] + w010*t010[1] + w001*t001[1] + w011*t011[1] + - w100*t100[1] + w110*t110[1] + w101*t101[1] + w111*t111[1]; - rgba[2] = w000*t000[2] + w010*t010[2] + w001*t001[2] + w011*t011[2] + - w100*t100[2] + w110*t110[2] + w101*t101[2] + w111*t111[2]; - rgba[3] = w000*t000[3] + w010*t010[3] + w001*t001[3] + w011*t011[3] + - w100*t100[3] + w110*t110[3] + w101*t101[3] + w111*t111[3]; -#elif CHAN_TYPE == GL_UNSIGNED_SHORT - rgba[0] = (GLchan) (w000*t000[0] + w010*t010[0] + - w001*t001[0] + w011*t011[0] + - w100*t100[0] + w110*t110[0] + - w101*t101[0] + w111*t111[0] + 0.5); - rgba[1] = (GLchan) (w000*t000[1] + w010*t010[1] + - w001*t001[1] + w011*t011[1] + - w100*t100[1] + w110*t110[1] + - w101*t101[1] + w111*t111[1] + 0.5); - rgba[2] = (GLchan) (w000*t000[2] + w010*t010[2] + - w001*t001[2] + w011*t011[2] + - w100*t100[2] + w110*t110[2] + - w101*t101[2] + w111*t111[2] + 0.5); - rgba[3] = (GLchan) (w000*t000[3] + w010*t010[3] + - w001*t001[3] + w011*t011[3] + - w100*t100[3] + w110*t110[3] + - w101*t101[3] + w111*t111[3] + 0.5); -#else /* CHAN_BITS == 8 */ - rgba[0] = (GLchan) ( - (w000*t000[0] + w010*t010[0] + w001*t001[0] + w011*t011[0] + - w100*t100[0] + w110*t110[0] + w101*t101[0] + w111*t111[0] ) - >> WEIGHT_SHIFT); - rgba[1] = (GLchan) ( - (w000*t000[1] + w010*t010[1] + w001*t001[1] + w011*t011[1] + - w100*t100[1] + w110*t110[1] + w101*t101[1] + w111*t111[1] ) - >> WEIGHT_SHIFT); - rgba[2] = (GLchan) ( - (w000*t000[2] + w010*t010[2] + w001*t001[2] + w011*t011[2] + - w100*t100[2] + w110*t110[2] + w101*t101[2] + w111*t111[2] ) - >> WEIGHT_SHIFT); - rgba[3] = (GLchan) ( - (w000*t000[3] + w010*t010[3] + w001*t001[3] + w011*t011[3] + - w100*t100[3] + w110*t110[3] + w101*t101[3] + w111*t111[3] ) - >> WEIGHT_SHIFT); -#endif - - } -} - - - -static void -sample_3d_nearest_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4] ) -{ - GLuint i; - for (i = 0; i < n; i++) { - GLint level; - COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda[i], level); - sample_3d_nearest(ctx, tObj, tObj->Image[level], texcoord[i], rgba[i]); - } -} - - -static void -sample_3d_linear_mipmap_nearest(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level; - COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda[i], level); - sample_3d_linear(ctx, tObj, tObj->Image[level], texcoord[i], rgba[i]); - } -} - - -static void -sample_3d_nearest_mipmap_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level; - COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level); - if (level >= tObj->_MaxLevel) { - sample_3d_nearest(ctx, tObj, tObj->Image[tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLchan t0[4], t1[4]; /* texels */ - const GLfloat f = FRAC(lambda[i]); - sample_3d_nearest(ctx, tObj, tObj->Image[level ], texcoord[i], t0); - sample_3d_nearest(ctx, tObj, tObj->Image[level+1], texcoord[i], t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); - } - } -} - - -static void -sample_3d_linear_mipmap_linear(GLcontext *ctx, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - GLint level; - COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level); - if (level >= tObj->_MaxLevel) { - sample_3d_linear(ctx, tObj, tObj->Image[tObj->_MaxLevel], - texcoord[i], rgba[i]); - } - else { - GLchan t0[4], t1[4]; /* texels */ - const GLfloat f = FRAC(lambda[i]); - sample_3d_linear(ctx, tObj, tObj->Image[level ], texcoord[i], t0); - sample_3d_linear(ctx, tObj, tObj->Image[level+1], texcoord[i], t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); - } - } -} - - -static void -sample_nearest_3d(GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLchan rgba[][4]) -{ - GLuint i; - struct gl_texture_image *image = tObj->Image[tObj->BaseLevel]; - (void) lambda; - for (i=0;iImage[tObj->BaseLevel]; - (void) lambda; - for (i=0;i_MinMagThresh[texUnit], - n, lambda, &minStart, &minEnd, &magStart, &magEnd); - - if (minStart < minEnd) { - /* do the minified texels */ - GLuint m = minEnd - minStart; - switch (tObj->MinFilter) { - case GL_NEAREST: - for (i = minStart; i < minEnd; i++) - sample_3d_nearest(ctx, tObj, tObj->Image[tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_LINEAR: - for (i = minStart; i < minEnd; i++) - sample_3d_linear(ctx, tObj, tObj->Image[tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_NEAREST_MIPMAP_NEAREST: - sample_3d_nearest_mipmap_nearest(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_NEAREST: - sample_3d_linear_mipmap_nearest(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_NEAREST_MIPMAP_LINEAR: - sample_3d_nearest_mipmap_linear(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_LINEAR: - sample_3d_linear_mipmap_linear(ctx, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - default: - _mesa_problem(ctx, "Bad min filter in sample_3d_texture"); - return; - } - } - - if (magStart < magEnd) { - /* do the magnified texels */ - switch (tObj->MagFilter) { - case GL_NEAREST: - for (i = magStart; i < magEnd; i++) - sample_3d_nearest(ctx, tObj, tObj->Image[tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - case GL_LINEAR: - for (i = magStart; i < magEnd; i++) - sample_3d_linear(ctx, tObj, tObj->Image[tObj->BaseLevel], - texcoords[i], rgba[i]); - break; - default: - _mesa_problem(ctx, "Bad mag filter in sample_3d_texture"); - return; - } - } -} - - -/**********************************************************************/ -/* Texture Cube Map Sampling Functions */ -/**********************************************************************/ - -/* - * Choose one of six sides of a texture cube map given the texture - * coord (rx,ry,rz). Return pointer to corresponding array of texture - * images. - */ -static const struct gl_texture_image ** -choose_cube_face(const struct gl_texture_object *texObj, - const GLfloat texcoord[4], GLfloat newCoord[4]) -{ -/* - major axis - direction target sc tc ma - ---------- ------------------------------- --- --- --- - +rx TEXTURE_CUBE_MAP_POSITIVE_X_EXT -rz -ry rx - -rx TEXTURE_CUBE_MAP_NEGATIVE_X_EXT +rz -ry rx - +ry TEXTURE_CUBE_MAP_POSITIVE_Y_EXT +rx +rz ry - -ry TEXTURE_CUBE_MAP_NEGATIVE_Y_EXT +rx -rz ry - +rz TEXTURE_CUBE_MAP_POSITIVE_Z_EXT +rx -ry rz - -rz TEXTURE_CUBE_MAP_NEGATIVE_Z_EXT -rx -ry rz -*/ - const GLfloat rx = texcoord[0]; - const GLfloat ry = texcoord[1]; - const GLfloat rz = texcoord[2]; - const struct gl_texture_image **imgArray; - const GLfloat arx = FABSF(rx), ary = FABSF(ry), arz = FABSF(rz); - GLfloat sc, tc, ma; - - if (arx > ary && arx > arz) { - if (rx >= 0.0F) { - imgArray = (const struct gl_texture_image **) texObj->Image; - sc = -rz; - tc = -ry; - ma = arx; - } - else { - imgArray = (const struct gl_texture_image **) texObj->NegX; - sc = rz; - tc = -ry; - ma = arx; - } - } - else if (ary > arx && ary > arz) { - if (ry >= 0.0F) { - imgArray = (const struct gl_texture_image **) texObj->PosY; - sc = rx; - tc = rz; - ma = ary; - } - else { - imgArray = (const struct gl_texture_image **) texObj->NegY; - sc = rx; - tc = -rz; - ma = ary; - } - } - else { - if (rz > 0.0F) { - imgArray = (const struct gl_texture_image **) texObj->PosZ; - sc = rx; - tc = -ry; - ma = arz; - } - else { - imgArray = (const struct gl_texture_image **) texObj->NegZ; - sc = -rx; - tc = -ry; - ma = arz; - } - } - - newCoord[0] = ( sc / ma + 1.0F ) * 0.5F; - newCoord[1] = ( tc / ma + 1.0F ) * 0.5F; - return imgArray; -} - - -static void -sample_nearest_cube(GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLchan rgba[][4]) -{ - GLuint i; - (void) lambda; - for (i = 0; i < n; i++) { - const struct gl_texture_image **images; - GLfloat newCoord[4]; - images = choose_cube_face(tObj, texcoords[i], newCoord); - sample_2d_nearest(ctx, tObj, images[tObj->BaseLevel], - newCoord, rgba[i]); - } -} - - -static void -sample_linear_cube(GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], - const GLfloat lambda[], GLchan rgba[][4]) -{ - GLuint i; - (void) lambda; - for (i = 0; i < n; i++) { - const struct gl_texture_image **images; - GLfloat newCoord[4]; - images = choose_cube_face(tObj, texcoords[i], newCoord); - sample_2d_linear(ctx, tObj, images[tObj->BaseLevel], - newCoord, rgba[i]); - } -} - - -static void -sample_cube_nearest_mipmap_nearest(GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - const struct gl_texture_image **images; - GLfloat newCoord[4]; - GLint level; - COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda[i], level); - images = choose_cube_face(tObj, texcoord[i], newCoord); - sample_2d_nearest(ctx, tObj, images[level], newCoord, rgba[i]); - } -} - - -static void -sample_cube_linear_mipmap_nearest(GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - const struct gl_texture_image **images; - GLfloat newCoord[4]; - GLint level; - COMPUTE_NEAREST_MIPMAP_LEVEL(tObj, lambda[i], level); - images = choose_cube_face(tObj, texcoord[i], newCoord); - sample_2d_linear(ctx, tObj, images[level], newCoord, rgba[i]); - } -} - - -static void -sample_cube_nearest_mipmap_linear(GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - const struct gl_texture_image **images; - GLfloat newCoord[4]; - GLint level; - COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level); - images = choose_cube_face(tObj, texcoord[i], newCoord); - if (level >= tObj->_MaxLevel) { - sample_2d_nearest(ctx, tObj, images[tObj->_MaxLevel], - newCoord, rgba[i]); - } - else { - GLchan t0[4], t1[4]; /* texels */ - const GLfloat f = FRAC(lambda[i]); - sample_2d_nearest(ctx, tObj, images[level ], newCoord, t0); - sample_2d_nearest(ctx, tObj, images[level+1], newCoord, t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); - } - } -} - - -static void -sample_cube_linear_mipmap_linear(GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, - GLuint n, const GLfloat texcoord[][4], - const GLfloat lambda[], GLchan rgba[][4]) -{ - GLuint i; - ASSERT(lambda != NULL); - for (i = 0; i < n; i++) { - const struct gl_texture_image **images; - GLfloat newCoord[4]; - GLint level; - COMPUTE_LINEAR_MIPMAP_LEVEL(tObj, lambda[i], level); - images = choose_cube_face(tObj, texcoord[i], newCoord); - if (level >= tObj->_MaxLevel) { - sample_2d_linear(ctx, tObj, images[tObj->_MaxLevel], - newCoord, rgba[i]); - } - else { - GLchan t0[4], t1[4]; - const GLfloat f = FRAC(lambda[i]); - sample_2d_linear(ctx, tObj, images[level ], newCoord, t0); - sample_2d_linear(ctx, tObj, images[level+1], newCoord, t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); - } - } -} - - -static void -sample_lambda_cube( GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLchan rgba[][4]) -{ - GLuint minStart, minEnd; /* texels with minification */ - GLuint magStart, magEnd; /* texels with magnification */ - - ASSERT(lambda != NULL); - compute_min_mag_ranges(SWRAST_CONTEXT(ctx)->_MinMagThresh[texUnit], - n, lambda, &minStart, &minEnd, &magStart, &magEnd); - - if (minStart < minEnd) { - /* do the minified texels */ - const GLuint m = minEnd - minStart; - switch (tObj->MinFilter) { - case GL_NEAREST: - sample_nearest_cube(ctx, texUnit, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR: - sample_linear_cube(ctx, texUnit, tObj, m, texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_NEAREST_MIPMAP_NEAREST: - sample_cube_nearest_mipmap_nearest(ctx, texUnit, tObj, m, - texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_NEAREST: - sample_cube_linear_mipmap_nearest(ctx, texUnit, tObj, m, - texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_NEAREST_MIPMAP_LINEAR: - sample_cube_nearest_mipmap_linear(ctx, texUnit, tObj, m, - texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - case GL_LINEAR_MIPMAP_LINEAR: - sample_cube_linear_mipmap_linear(ctx, texUnit, tObj, m, - texcoords + minStart, - lambda + minStart, rgba + minStart); - break; - default: - _mesa_problem(ctx, "Bad min filter in sample_lambda_cube"); - } - } - - if (magStart < magEnd) { - /* do the magnified texels */ - const GLuint m = magEnd - magStart; - switch (tObj->MagFilter) { - case GL_NEAREST: - sample_nearest_cube(ctx, texUnit, tObj, m, texcoords + magStart, - lambda + magStart, rgba + magStart); - break; - case GL_LINEAR: - sample_linear_cube(ctx, texUnit, tObj, m, texcoords + magStart, - lambda + magStart, rgba + magStart); - break; - default: - _mesa_problem(ctx, "Bad mag filter in sample_lambda_cube"); - } - } -} - - -/**********************************************************************/ -/* Texture Rectangle Sampling Functions */ -/**********************************************************************/ - -static void -sample_nearest_rect(GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLchan rgba[][4]) -{ - const struct gl_texture_image *img = tObj->Image[0]; - const GLfloat width = (GLfloat) img->Width; - const GLfloat height = (GLfloat) img->Height; - const GLint width_minus_1 = img->Width - 1; - const GLint height_minus_1 = img->Height - 1; - GLuint i; - - (void) texUnit; - (void) lambda; - - ASSERT(tObj->WrapS == GL_CLAMP || - tObj->WrapS == GL_CLAMP_TO_EDGE || - tObj->WrapS == GL_CLAMP_TO_BORDER); - ASSERT(tObj->WrapT == GL_CLAMP || - tObj->WrapT == GL_CLAMP_TO_EDGE || - tObj->WrapT == GL_CLAMP_TO_BORDER); - ASSERT(img->Format != GL_COLOR_INDEX); - - /* XXX move Wrap mode tests outside of loops for common cases */ - for (i = 0; i < n; i++) { - GLint row, col; - /* NOTE: we DO NOT use [0, 1] texture coordinates! */ - if (tObj->WrapS == GL_CLAMP) { - col = IFLOOR( CLAMP(texcoords[i][0], 0.0F, width) ); - } - else if (tObj->WrapS == GL_CLAMP_TO_EDGE) { - col = IFLOOR( CLAMP(texcoords[i][0], 0.5F, width - 0.5F) ); - } - else { - col = IFLOOR( CLAMP(texcoords[i][0], -0.5F, width + 0.5F) ); - } - if (tObj->WrapT == GL_CLAMP) { - row = IFLOOR( CLAMP(texcoords[i][1], 0.0F, height) ); - } - else if (tObj->WrapT == GL_CLAMP_TO_EDGE) { - row = IFLOOR( CLAMP(texcoords[i][1], 0.5F, height - 0.5F) ); - } - else { - row = IFLOOR( CLAMP(texcoords[i][1], -0.5F, height + 0.5F) ); - } - - col = CLAMP(col, 0, width_minus_1); - row = CLAMP(row, 0, height_minus_1); - - (*img->FetchTexel)(img, col, row, 0, (GLvoid *) rgba[i]); - } -} - - -static void -sample_linear_rect(GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], - const GLfloat lambda[], GLchan rgba[][4]) -{ - const struct gl_texture_image *img = tObj->Image[0]; - const GLfloat width = (GLfloat) img->Width; - const GLfloat height = (GLfloat) img->Height; - const GLint width_minus_1 = img->Width - 1; - const GLint height_minus_1 = img->Height - 1; - GLuint i; - - (void) texUnit; - (void) lambda; - - ASSERT(tObj->WrapS == GL_CLAMP || - tObj->WrapS == GL_CLAMP_TO_EDGE || - tObj->WrapS == GL_CLAMP_TO_BORDER); - ASSERT(tObj->WrapT == GL_CLAMP || - tObj->WrapT == GL_CLAMP_TO_EDGE || - tObj->WrapT == GL_CLAMP_TO_BORDER); - ASSERT(img->Format != GL_COLOR_INDEX); - - /* XXX lots of opportunity for optimization in this loop */ - for (i = 0; i < n; i++) { - GLfloat frow, fcol; - GLint row0, col0, row1, col1; - GLchan t00[4], t01[4], t10[4], t11[4]; - GLfloat a, b, w00, w01, w10, w11; - - /* NOTE: we DO NOT use [0, 1] texture coordinates! */ - if (tObj->WrapS == GL_CLAMP) { - fcol = CLAMP(texcoords[i][0], 0.0F, width); - } - else if (tObj->WrapS == GL_CLAMP_TO_EDGE) { - fcol = CLAMP(texcoords[i][0], 0.5F, width - 0.5F); - } - else { - fcol = CLAMP(texcoords[i][0], -0.5F, width + 0.5F); - } - if (tObj->WrapT == GL_CLAMP) { - frow = CLAMP(texcoords[i][1], 0.0F, height); - } - else if (tObj->WrapT == GL_CLAMP_TO_EDGE) { - frow = CLAMP(texcoords[i][1], 0.5F, height - 0.5F); - } - else { - frow = CLAMP(texcoords[i][1], -0.5F, height + 0.5F); - } - - /* compute integer rows/columns */ - col0 = IFLOOR(fcol); - col1 = col0 + 1; - col0 = CLAMP(col0, 0, width_minus_1); - col1 = CLAMP(col1, 0, width_minus_1); - row0 = IFLOOR(frow); - row1 = row0 + 1; - row0 = CLAMP(row0, 0, height_minus_1); - row1 = CLAMP(row1, 0, height_minus_1); - - /* get four texel samples */ - (*img->FetchTexel)(img, col0, row0, 0, (GLvoid *) t00); - (*img->FetchTexel)(img, col1, row0, 0, (GLvoid *) t10); - (*img->FetchTexel)(img, col0, row1, 0, (GLvoid *) t01); - (*img->FetchTexel)(img, col1, row1, 0, (GLvoid *) t11); - - /* compute sample weights */ - a = FRAC(fcol); - b = FRAC(frow); - w00 = (1.0F-a) * (1.0F-b); - w10 = a * (1.0F-b); - w01 = (1.0F-a) * b ; - w11 = a * b ; - - /* compute weighted average of samples */ - rgba[i][0] = - (GLchan) (w00 * t00[0] + w10 * t10[0] + w01 * t01[0] + w11 * t11[0]); - rgba[i][1] = - (GLchan) (w00 * t00[1] + w10 * t10[1] + w01 * t01[1] + w11 * t11[1]); - rgba[i][2] = - (GLchan) (w00 * t00[2] + w10 * t10[2] + w01 * t01[2] + w11 * t11[2]); - rgba[i][3] = - (GLchan) (w00 * t00[3] + w10 * t10[3] + w01 * t01[3] + w11 * t11[3]); - } -} - - -static void -sample_lambda_rect( GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLchan rgba[][4]) -{ - GLuint minStart, minEnd, magStart, magEnd; - - /* We only need lambda to decide between minification and magnification. - * There is no mipmapping with rectangular textures. - */ - compute_min_mag_ranges(SWRAST_CONTEXT(ctx)->_MinMagThresh[texUnit], - n, lambda, &minStart, &minEnd, &magStart, &magEnd); - - if (minStart < minEnd) { - if (tObj->MinFilter == GL_NEAREST) { - sample_nearest_rect( ctx, texUnit, tObj, minEnd - minStart, - texcoords + minStart, NULL, rgba + minStart); - } - else { - sample_linear_rect( ctx, texUnit, tObj, minEnd - minStart, - texcoords + minStart, NULL, rgba + minStart); - } - } - if (magStart < magEnd) { - if (tObj->MagFilter == GL_NEAREST) { - sample_nearest_rect( ctx, texUnit, tObj, magEnd - magStart, - texcoords + magStart, NULL, rgba + magStart); - } - else { - sample_linear_rect( ctx, texUnit, tObj, magEnd - magStart, - texcoords + magStart, NULL, rgba + magStart); - } - } -} - - - -/* - * Sample a shadow/depth texture. - */ -static void -sample_depth_texture( GLcontext *ctx, GLuint unit, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLchan texel[][4] ) -{ - const GLint baseLevel = tObj->BaseLevel; - const struct gl_texture_image *texImage = tObj->Image[baseLevel]; - const GLuint width = texImage->Width; - const GLuint height = texImage->Height; - GLchan ambient; - GLenum function; - GLchan result; - - (void) unit; - - ASSERT(tObj->Image[tObj->BaseLevel]->Format == GL_DEPTH_COMPONENT); - ASSERT(tObj->Target == GL_TEXTURE_1D || - tObj->Target == GL_TEXTURE_2D || - tObj->Target == GL_TEXTURE_RECTANGLE_NV); - - UNCLAMPED_FLOAT_TO_CHAN(ambient, tObj->ShadowAmbient); - - /* XXXX if tObj->MinFilter != tObj->MagFilter, we're ignoring lambda */ - - /* XXX this could be precomputed and saved in the texture object */ - if (tObj->CompareFlag) { - /* GL_SGIX_shadow */ - if (tObj->CompareOperator == GL_TEXTURE_LEQUAL_R_SGIX) { - function = GL_LEQUAL; - } - else { - ASSERT(tObj->CompareOperator == GL_TEXTURE_GEQUAL_R_SGIX); - function = GL_GEQUAL; - } - } - else if (tObj->CompareMode == GL_COMPARE_R_TO_TEXTURE_ARB) { - /* GL_ARB_shadow */ - function = tObj->CompareFunc; - } - else { - function = GL_NONE; /* pass depth through as grayscale */ - } - - if (tObj->MagFilter == GL_NEAREST) { - GLuint i; - for (i = 0; i < n; i++) { - GLfloat depthSample; - GLint col, row; - /* XXX fix for texture rectangle! */ - COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapS, texcoords[i][0], width, col); - COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapT, texcoords[i][1], height, row); - depthSample = *((const GLfloat *) texImage->Data + row * width + col); - - switch (function) { - case GL_LEQUAL: - result = (texcoords[i][2] <= depthSample) ? CHAN_MAX : ambient; - break; - case GL_GEQUAL: - result = (texcoords[i][2] >= depthSample) ? CHAN_MAX : ambient; - break; - case GL_LESS: - result = (texcoords[i][2] < depthSample) ? CHAN_MAX : ambient; - break; - case GL_GREATER: - result = (texcoords[i][2] > depthSample) ? CHAN_MAX : ambient; - break; - case GL_EQUAL: - result = (texcoords[i][2] == depthSample) ? CHAN_MAX : ambient; - break; - case GL_NOTEQUAL: - result = (texcoords[i][2] != depthSample) ? CHAN_MAX : ambient; - break; - case GL_ALWAYS: - result = CHAN_MAX; - break; - case GL_NEVER: - result = ambient; - break; - case GL_NONE: - CLAMPED_FLOAT_TO_CHAN(result, depthSample); - break; - default: - _mesa_problem(ctx, "Bad compare func in sample_depth_texture"); - return; - } - - switch (tObj->DepthMode) { - case GL_LUMINANCE: - texel[i][RCOMP] = result; - texel[i][GCOMP] = result; - texel[i][BCOMP] = result; - texel[i][ACOMP] = CHAN_MAX; - break; - case GL_INTENSITY: - texel[i][RCOMP] = result; - texel[i][GCOMP] = result; - texel[i][BCOMP] = result; - texel[i][ACOMP] = result; - break; - case GL_ALPHA: - texel[i][RCOMP] = 0; - texel[i][GCOMP] = 0; - texel[i][BCOMP] = 0; - texel[i][ACOMP] = result; - break; - default: - _mesa_problem(ctx, "Bad depth texture mode"); - } - } - } - else { - GLuint i; - ASSERT(tObj->MagFilter == GL_LINEAR); - for (i = 0; i < n; i++) { - GLfloat depth00, depth01, depth10, depth11; - GLint i0, i1, j0, j1; - GLfloat u, v; - GLuint useBorderTexel; - - /* XXX fix for texture rectangle! */ - COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapS, texcoords[i][0], u, width, i0, i1); - COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapT, texcoords[i][1], v, height,j0, j1); - - useBorderTexel = 0; - if (texImage->Border) { - i0 += texImage->Border; - i1 += texImage->Border; - j0 += texImage->Border; - j1 += texImage->Border; - } - else { - if (i0 < 0 || i0 >= (GLint) width) useBorderTexel |= I0BIT; - if (i1 < 0 || i1 >= (GLint) width) useBorderTexel |= I1BIT; - if (j0 < 0 || j0 >= (GLint) height) useBorderTexel |= J0BIT; - if (j1 < 0 || j1 >= (GLint) height) useBorderTexel |= J1BIT; - } - - /* get four depth samples from the texture */ - if (useBorderTexel & (I0BIT | J0BIT)) { - depth00 = 1.0; - } - else { - depth00 = *((const GLfloat *) texImage->Data + j0 * width + i0); - } - if (useBorderTexel & (I1BIT | J0BIT)) { - depth10 = 1.0; - } - else { - depth10 = *((const GLfloat *) texImage->Data + j0 * width + i1); - } - if (useBorderTexel & (I0BIT | J1BIT)) { - depth01 = 1.0; - } - else { - depth01 = *((const GLfloat *) texImage->Data + j1 * width + i0); - } - if (useBorderTexel & (I1BIT | J1BIT)) { - depth11 = 1.0; - } - else { - depth11 = *((const GLfloat *) texImage->Data + j1 * width + i1); - } - - if (0) { - /* compute a single weighted depth sample and do one comparison */ - const GLfloat a = FRAC(u + 1.0F); - const GLfloat b = FRAC(v + 1.0F); - const GLfloat w00 = (1.0F - a) * (1.0F - b); - const GLfloat w10 = ( a) * (1.0F - b); - const GLfloat w01 = (1.0F - a) * ( b); - const GLfloat w11 = ( a) * ( b); - const GLfloat depthSample = w00 * depth00 + w10 * depth10 - + w01 * depth01 + w11 * depth11; - if ((depthSample <= texcoords[i][2] && function == GL_LEQUAL) || - (depthSample >= texcoords[i][2] && function == GL_GEQUAL)) { - result = ambient; - } - else { - result = CHAN_MAX; - } - } - else { - /* Do four depth/R comparisons and compute a weighted result. - * If this touches on somebody's I.P., I'll remove this code - * upon request. - */ - const GLfloat d = (CHAN_MAXF - (GLfloat) ambient) * 0.25F; - GLfloat luminance = CHAN_MAXF; - - switch (function) { - case GL_LEQUAL: - if (depth00 <= texcoords[i][2]) luminance -= d; - if (depth01 <= texcoords[i][2]) luminance -= d; - if (depth10 <= texcoords[i][2]) luminance -= d; - if (depth11 <= texcoords[i][2]) luminance -= d; - result = (GLchan) luminance; - break; - case GL_GEQUAL: - if (depth00 >= texcoords[i][2]) luminance -= d; - if (depth01 >= texcoords[i][2]) luminance -= d; - if (depth10 >= texcoords[i][2]) luminance -= d; - if (depth11 >= texcoords[i][2]) luminance -= d; - result = (GLchan) luminance; - break; - case GL_LESS: - if (depth00 < texcoords[i][2]) luminance -= d; - if (depth01 < texcoords[i][2]) luminance -= d; - if (depth10 < texcoords[i][2]) luminance -= d; - if (depth11 < texcoords[i][2]) luminance -= d; - result = (GLchan) luminance; - break; - case GL_GREATER: - if (depth00 > texcoords[i][2]) luminance -= d; - if (depth01 > texcoords[i][2]) luminance -= d; - if (depth10 > texcoords[i][2]) luminance -= d; - if (depth11 > texcoords[i][2]) luminance -= d; - result = (GLchan) luminance; - break; - case GL_EQUAL: - if (depth00 == texcoords[i][2]) luminance -= d; - if (depth01 == texcoords[i][2]) luminance -= d; - if (depth10 == texcoords[i][2]) luminance -= d; - if (depth11 == texcoords[i][2]) luminance -= d; - result = (GLchan) luminance; - break; - case GL_NOTEQUAL: - if (depth00 != texcoords[i][2]) luminance -= d; - if (depth01 != texcoords[i][2]) luminance -= d; - if (depth10 != texcoords[i][2]) luminance -= d; - if (depth11 != texcoords[i][2]) luminance -= d; - result = (GLchan) luminance; - break; - case GL_ALWAYS: - result = 0; - break; - case GL_NEVER: - result = CHAN_MAX; - break; - case GL_NONE: - /* ordinary bilinear filtering */ - { - const GLfloat a = FRAC(u + 1.0F); - const GLfloat b = FRAC(v + 1.0F); - const GLfloat w00 = (1.0F - a) * (1.0F - b); - const GLfloat w10 = ( a) * (1.0F - b); - const GLfloat w01 = (1.0F - a) * ( b); - const GLfloat w11 = ( a) * ( b); - const GLfloat depthSample = w00 * depth00 + w10 * depth10 - + w01 * depth01 + w11 * depth11; - CLAMPED_FLOAT_TO_CHAN(result, depthSample); - } - break; - default: - _mesa_problem(ctx, "Bad compare func in sample_depth_texture"); - return; - } - } - - switch (tObj->DepthMode) { - case GL_LUMINANCE: - texel[i][RCOMP] = result; - texel[i][GCOMP] = result; - texel[i][BCOMP] = result; - texel[i][ACOMP] = CHAN_MAX; - break; - case GL_INTENSITY: - texel[i][RCOMP] = result; - texel[i][GCOMP] = result; - texel[i][BCOMP] = result; - texel[i][ACOMP] = result; - break; - case GL_ALPHA: - texel[i][RCOMP] = 0; - texel[i][GCOMP] = 0; - texel[i][BCOMP] = 0; - texel[i][ACOMP] = result; - break; - default: - _mesa_problem(ctx, "Bad depth texture mode"); - } - } /* for */ - } /* if filter */ -} - - -#if 0 -/* - * Experimental depth texture sampling function. - */ -static void -sample_depth_texture2(const GLcontext *ctx, - const struct gl_texture_unit *texUnit, - GLuint n, const GLfloat texcoords[][4], - GLchan texel[][4]) -{ - const struct gl_texture_object *texObj = texUnit->_Current; - const GLint baseLevel = texObj->BaseLevel; - const struct gl_texture_image *texImage = texObj->Image[baseLevel]; - const GLuint width = texImage->Width; - const GLuint height = texImage->Height; - GLchan ambient; - GLboolean lequal, gequal; - - if (texObj->Target != GL_TEXTURE_2D) { - _mesa_problem(ctx, "only 2-D depth textures supported at this time"); - return; - } - - if (texObj->MinFilter != texObj->MagFilter) { - _mesa_problem(ctx, "mipmapped depth textures not supported at this time"); - return; - } - - /* XXX the GL_SGIX_shadow extension spec doesn't say what to do if - * GL_TEXTURE_COMPARE_SGIX == GL_TRUE but the current texture object - * isn't a depth texture. - */ - if (texImage->Format != GL_DEPTH_COMPONENT) { - _mesa_problem(ctx,"GL_TEXTURE_COMPARE_SGIX enabled with non-depth texture"); - return; - } - - UNCLAMPED_FLOAT_TO_CHAN(ambient, tObj->ShadowAmbient); - - if (texObj->CompareOperator == GL_TEXTURE_LEQUAL_R_SGIX) { - lequal = GL_TRUE; - gequal = GL_FALSE; - } - else { - lequal = GL_FALSE; - gequal = GL_TRUE; - } - - { - GLuint i; - for (i = 0; i < n; i++) { - const GLint K = 3; - GLint col, row, ii, jj, imin, imax, jmin, jmax, samples, count; - GLfloat w; - GLchan lum; - COMPUTE_NEAREST_TEXEL_LOCATION(texObj->WrapS, texcoords[i][0], - width, col); - COMPUTE_NEAREST_TEXEL_LOCATION(texObj->WrapT, texcoords[i][1], - height, row); - - imin = col - K; - imax = col + K; - jmin = row - K; - jmax = row + K; - - if (imin < 0) imin = 0; - if (imax >= width) imax = width - 1; - if (jmin < 0) jmin = 0; - if (jmax >= height) jmax = height - 1; - - samples = (imax - imin + 1) * (jmax - jmin + 1); - count = 0; - for (jj = jmin; jj <= jmax; jj++) { - for (ii = imin; ii <= imax; ii++) { - GLfloat depthSample = *((const GLfloat *) texImage->Data - + jj * width + ii); - if ((depthSample <= r[i] && lequal) || - (depthSample >= r[i] && gequal)) { - count++; - } - } - } - - w = (GLfloat) count / (GLfloat) samples; - w = CHAN_MAXF - w * (CHAN_MAXF - (GLfloat) ambient); - lum = (GLint) w; - - texel[i][RCOMP] = lum; - texel[i][GCOMP] = lum; - texel[i][BCOMP] = lum; - texel[i][ACOMP] = CHAN_MAX; - } - } -} -#endif - - -/** - * We use this function when a texture object is in an "incomplete" state. - * When a fragment program attempts to sample an incomplete texture we - * return black. - * Note: frag progs don't observe texture enable/disable flags. - */ -static void -null_sample_func( GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, GLuint n, - const GLfloat texcoords[][4], const GLfloat lambda[], - GLchan rgba[][4]) -{ - (void) ctx; - (void) texUnit; - (void) tObj; - (void) texcoords; - (void) lambda; - _mesa_bzero(rgba, n * 4 * sizeof(GLchan)); -} - - - -/** - * Setup the texture sampling function for this texture object. - */ -texture_sample_func -_swrast_choose_texture_sample_func( GLcontext *ctx, - const struct gl_texture_object *t ) -{ - const GLboolean needLambda = (GLboolean) (t->MinFilter != t->MagFilter); - const GLenum format = t->Image[t->BaseLevel]->Format; - - if (!t->Complete) { - return &null_sample_func; - } - - switch (t->Target) { - case GL_TEXTURE_1D: - if (format == GL_DEPTH_COMPONENT) { - return &sample_depth_texture; - } - else if (needLambda) { - return &sample_lambda_1d; - } - else if (t->MinFilter == GL_LINEAR) { - return &sample_linear_1d; - } - else { - ASSERT(t->MinFilter == GL_NEAREST); - return &sample_nearest_1d; - } - break; - case GL_TEXTURE_2D: - if (format == GL_DEPTH_COMPONENT) { - return &sample_depth_texture; - } - else if (needLambda) { - return &sample_lambda_2d; - } - else if (t->MinFilter == GL_LINEAR) { - return &sample_linear_2d; - } - else { - GLint baseLevel = t->BaseLevel; - ASSERT(t->MinFilter == GL_NEAREST); - if (t->WrapS == GL_REPEAT && - t->WrapT == GL_REPEAT && - t->_IsPowerOfTwo && - t->Image[baseLevel]->Border == 0 && - t->Image[baseLevel]->TexFormat->MesaFormat == MESA_FORMAT_RGB) { - return &opt_sample_rgb_2d; - } - else if (t->WrapS == GL_REPEAT && - t->WrapT == GL_REPEAT && - t->_IsPowerOfTwo && - t->Image[baseLevel]->Border == 0 && - t->Image[baseLevel]->TexFormat->MesaFormat == MESA_FORMAT_RGBA) { - return &opt_sample_rgba_2d; - } - else { - return &sample_nearest_2d; - } - } - break; - case GL_TEXTURE_3D: - if (needLambda) { - return &sample_lambda_3d; - } - else if (t->MinFilter == GL_LINEAR) { - return &sample_linear_3d; - } - else { - ASSERT(t->MinFilter == GL_NEAREST); - return &sample_nearest_3d; - } - break; - case GL_TEXTURE_CUBE_MAP: - if (needLambda) { - return &sample_lambda_cube; - } - else if (t->MinFilter == GL_LINEAR) { - return &sample_linear_cube; - } - else { - ASSERT(t->MinFilter == GL_NEAREST); - return &sample_nearest_cube; - } - break; - case GL_TEXTURE_RECTANGLE_NV: - if (needLambda) { - return &sample_lambda_rect; - } - else if (t->MinFilter == GL_LINEAR) { - return &sample_linear_rect; - } - else { - ASSERT(t->MinFilter == GL_NEAREST); - return &sample_nearest_rect; - } - break; - default: - _mesa_problem(ctx, - "invalid target in _swrast_choose_texture_sample_func"); - return &null_sample_func; - } -} - - -#define PROD(A,B) ( (GLuint)(A) * ((GLuint)(B)+1) ) -#define S_PROD(A,B) ( (GLint)(A) * ((GLint)(B)+1) ) - - -/** - * Do texture application for GL_ARB/EXT_texture_env_combine. - * This function also supports GL_{EXT,ARB}_texture_env_dot3 and - * GL_ATI_texture_env_combine3 - * - * \param ctx rendering context - * \param textureUnit the texture unit to apply - * \param n number of fragments to process (span width) - * \param primary_rgba incoming fragment color array - * \param texelBuffer pointer to texel colors for all texture units - * - * \param rgba incoming colors, which get modified here - */ -static INLINE void -texture_combine( const GLcontext *ctx, GLuint unit, GLuint n, - CONST GLchan (*primary_rgba)[4], - CONST GLchan *texelBuffer, - GLchan (*rgba)[4] ) -{ - const struct gl_texture_unit *textureUnit = &(ctx->Texture.Unit[unit]); - const GLchan (*argRGB [3])[4]; - const GLchan (*argA [3])[4]; - const GLuint RGBshift = textureUnit->CombineScaleShiftRGB; - const GLuint Ashift = textureUnit->CombineScaleShiftA; -#if CHAN_TYPE == GL_FLOAT - const GLchan RGBmult = (GLfloat) (1 << RGBshift); - const GLchan Amult = (GLfloat) (1 << Ashift); - static const GLchan one[4] = { 1.0, 1.0, 1.0, 1.0 }; - static const GLchan zero[4] = { 0.0, 0.0, 0.0, 0.0 }; -#else - const GLint half = (CHAN_MAX + 1) / 2; - static const GLchan one[4] = { CHAN_MAX, CHAN_MAX, CHAN_MAX, CHAN_MAX }; - static const GLchan zero[4] = { 0, 0, 0, 0 }; -#endif - GLuint i, j; - GLuint numColorArgs; - GLuint numAlphaArgs; - - /* GLchan ccolor[3][4]; */ - DEFMNARRAY(GLchan, ccolor, 3, 3 * MAX_WIDTH, 4); /* mac 32k limitation */ - CHECKARRAY(ccolor, return); /* mac 32k limitation */ - - ASSERT(ctx->Extensions.EXT_texture_env_combine || - ctx->Extensions.ARB_texture_env_combine); - ASSERT(SWRAST_CONTEXT(ctx)->_AnyTextureCombine); - - - /* - printf("modeRGB 0x%x modeA 0x%x srcRGB1 0x%x srcA1 0x%x srcRGB2 0x%x srcA2 0x%x\n", - textureUnit->CombineModeRGB, - textureUnit->CombineModeA, - textureUnit->CombineSourceRGB[0], - textureUnit->CombineSourceA[0], - textureUnit->CombineSourceRGB[1], - textureUnit->CombineSourceA[1]); - */ - - /* - * Do operand setup for up to 3 operands. Loop over the terms. - */ - switch (textureUnit->CombineModeRGB) { - case GL_REPLACE: - numColorArgs = 1; - break; - case GL_MODULATE: - case GL_ADD: - case GL_ADD_SIGNED: - case GL_SUBTRACT: - case GL_DOT3_RGB: - case GL_DOT3_RGBA: - case GL_DOT3_RGB_EXT: - case GL_DOT3_RGBA_EXT: - numColorArgs = 2; - break; - case GL_INTERPOLATE: - case GL_MODULATE_ADD_ATI: - case GL_MODULATE_SIGNED_ADD_ATI: - case GL_MODULATE_SUBTRACT_ATI: - numColorArgs = 3; - break; - default: - numColorArgs = 0; - ASSERT(0); - break; - } - - switch (textureUnit->CombineModeA) { - case GL_REPLACE: - numAlphaArgs = 1; - break; - case GL_MODULATE: - case GL_ADD: - case GL_ADD_SIGNED: - case GL_SUBTRACT: - numAlphaArgs = 2; - break; - case GL_INTERPOLATE: - case GL_MODULATE_ADD_ATI: - case GL_MODULATE_SIGNED_ADD_ATI: - case GL_MODULATE_SUBTRACT_ATI: - numAlphaArgs = 3; - break; - default: - numAlphaArgs = 0; - ASSERT(0); - break; - } - - for (j = 0; j < numColorArgs; j++) { - const GLenum srcRGB = textureUnit->CombineSourceRGB[j]; - - - switch (srcRGB) { - case GL_TEXTURE: - argRGB[j] = (const GLchan (*)[4]) - (texelBuffer + unit * (n * 4 * sizeof(GLchan))); - break; - case GL_PRIMARY_COLOR: - argRGB[j] = primary_rgba; - break; - case GL_PREVIOUS: - argRGB[j] = (const GLchan (*)[4]) rgba; - break; - case GL_CONSTANT: - { - GLchan (*c)[4] = ccolor[j]; - GLchan red, green, blue, alpha; - UNCLAMPED_FLOAT_TO_CHAN(red, textureUnit->EnvColor[0]); - UNCLAMPED_FLOAT_TO_CHAN(green, textureUnit->EnvColor[1]); - UNCLAMPED_FLOAT_TO_CHAN(blue, textureUnit->EnvColor[2]); - UNCLAMPED_FLOAT_TO_CHAN(alpha, textureUnit->EnvColor[3]); - for (i = 0; i < n; i++) { - c[i][RCOMP] = red; - c[i][GCOMP] = green; - c[i][BCOMP] = blue; - c[i][ACOMP] = alpha; - } - argRGB[j] = (const GLchan (*)[4]) ccolor[j]; - } - break; - /* GL_ATI_texture_env_combine3 allows GL_ZERO & GL_ONE as sources. - */ - case GL_ZERO: - argRGB[j] = & zero; - break; - case GL_ONE: - argRGB[j] = & one; - break; - default: - /* ARB_texture_env_crossbar source */ - { - const GLuint srcUnit = srcRGB - GL_TEXTURE0; - ASSERT(srcUnit < ctx->Const.MaxTextureUnits); - if (!ctx->Texture.Unit[srcUnit]._ReallyEnabled) - return; - argRGB[j] = (const GLchan (*)[4]) - (texelBuffer + srcUnit * (n * 4 * sizeof(GLchan))); - } - } - - if (textureUnit->CombineOperandRGB[j] != GL_SRC_COLOR) { - const GLchan (*src)[4] = argRGB[j]; - GLchan (*dst)[4] = ccolor[j]; - - /* point to new arg[j] storage */ - argRGB[j] = (const GLchan (*)[4]) ccolor[j]; - - if (textureUnit->CombineOperandRGB[j] == GL_ONE_MINUS_SRC_COLOR) { - for (i = 0; i < n; i++) { - dst[i][RCOMP] = CHAN_MAX - src[i][RCOMP]; - dst[i][GCOMP] = CHAN_MAX - src[i][GCOMP]; - dst[i][BCOMP] = CHAN_MAX - src[i][BCOMP]; - } - } - else if (textureUnit->CombineOperandRGB[j] == GL_SRC_ALPHA) { - for (i = 0; i < n; i++) { - dst[i][RCOMP] = src[i][ACOMP]; - dst[i][GCOMP] = src[i][ACOMP]; - dst[i][BCOMP] = src[i][ACOMP]; - } - } - else { - ASSERT(textureUnit->CombineOperandRGB[j] ==GL_ONE_MINUS_SRC_ALPHA); - for (i = 0; i < n; i++) { - dst[i][RCOMP] = CHAN_MAX - src[i][ACOMP]; - dst[i][GCOMP] = CHAN_MAX - src[i][ACOMP]; - dst[i][BCOMP] = CHAN_MAX - src[i][ACOMP]; - } - } - } - } - - - for (j = 0; j < numAlphaArgs; j++) { - const GLenum srcA = textureUnit->CombineSourceA[j]; - - switch (srcA) { - case GL_TEXTURE: - argA[j] = (const GLchan (*)[4]) - (texelBuffer + unit * (n * 4 * sizeof(GLchan))); - break; - case GL_PRIMARY_COLOR: - argA[j] = primary_rgba; - break; - case GL_PREVIOUS: - argA[j] = (const GLchan (*)[4]) rgba; - break; - case GL_CONSTANT: - { - GLchan alpha, (*c)[4] = ccolor[j]; - UNCLAMPED_FLOAT_TO_CHAN(alpha, textureUnit->EnvColor[3]); - for (i = 0; i < n; i++) - c[i][ACOMP] = alpha; - argA[j] = (const GLchan (*)[4]) ccolor[j]; - } - break; - /* GL_ATI_texture_env_combine3 allows GL_ZERO & GL_ONE as sources. - */ - case GL_ZERO: - argA[j] = & zero; - break; - case GL_ONE: - argA[j] = & one; - break; - default: - /* ARB_texture_env_crossbar source */ - { - const GLuint srcUnit = srcA - GL_TEXTURE0; - ASSERT(srcUnit < ctx->Const.MaxTextureUnits); - if (!ctx->Texture.Unit[srcUnit]._ReallyEnabled) - return; - argA[j] = (const GLchan (*)[4]) - (texelBuffer + srcUnit * (n * 4 * sizeof(GLchan))); - } - } - - if (textureUnit->CombineOperandA[j] == GL_ONE_MINUS_SRC_ALPHA) { - const GLchan (*src)[4] = argA[j]; - GLchan (*dst)[4] = ccolor[j]; - argA[j] = (const GLchan (*)[4]) ccolor[j]; - for (i = 0; i < n; i++) { - dst[i][ACOMP] = CHAN_MAX - src[i][ACOMP]; - } - } - } - - /* - * Do the texture combine. - */ - switch (textureUnit->CombineModeRGB) { - case GL_REPLACE: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - if (RGBshift) { - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = arg0[i][RCOMP] * RGBmult; - rgba[i][GCOMP] = arg0[i][GCOMP] * RGBmult; - rgba[i][BCOMP] = arg0[i][BCOMP] * RGBmult; -#else - GLuint r = (GLuint) arg0[i][RCOMP] << RGBshift; - GLuint g = (GLuint) arg0[i][GCOMP] << RGBshift; - GLuint b = (GLuint) arg0[i][BCOMP] << RGBshift; - rgba[i][RCOMP] = MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = MIN2(b, CHAN_MAX); -#endif - } - } - else { - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = arg0[i][RCOMP]; - rgba[i][GCOMP] = arg0[i][GCOMP]; - rgba[i][BCOMP] = arg0[i][BCOMP]; - } - } - } - break; - case GL_MODULATE: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - RGBshift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = arg0[i][RCOMP] * arg1[i][RCOMP] * RGBmult; - rgba[i][GCOMP] = arg0[i][GCOMP] * arg1[i][GCOMP] * RGBmult; - rgba[i][BCOMP] = arg0[i][BCOMP] * arg1[i][BCOMP] * RGBmult; -#else - GLuint r = PROD(arg0[i][RCOMP], arg1[i][RCOMP]) >> shift; - GLuint g = PROD(arg0[i][GCOMP], arg1[i][GCOMP]) >> shift; - GLuint b = PROD(arg0[i][BCOMP], arg1[i][BCOMP]) >> shift; - rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX); -#endif - } - } - break; - case GL_ADD: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = (arg0[i][RCOMP] + arg1[i][RCOMP]) * RGBmult; - rgba[i][GCOMP] = (arg0[i][GCOMP] + arg1[i][GCOMP]) * RGBmult; - rgba[i][BCOMP] = (arg0[i][BCOMP] + arg1[i][BCOMP]) * RGBmult; -#else - GLint r = ((GLint) arg0[i][RCOMP] + (GLint) arg1[i][RCOMP]) << RGBshift; - GLint g = ((GLint) arg0[i][GCOMP] + (GLint) arg1[i][GCOMP]) << RGBshift; - GLint b = ((GLint) arg0[i][BCOMP] + (GLint) arg1[i][BCOMP]) << RGBshift; - rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX); -#endif - } - } - break; - case GL_ADD_SIGNED: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = (arg0[i][RCOMP] + arg1[i][RCOMP] - 0.5) * RGBmult; - rgba[i][GCOMP] = (arg0[i][GCOMP] + arg1[i][GCOMP] - 0.5) * RGBmult; - rgba[i][BCOMP] = (arg0[i][BCOMP] + arg1[i][BCOMP] - 0.5) * RGBmult; -#else - GLint r = (GLint) arg0[i][RCOMP] + (GLint) arg1[i][RCOMP] -half; - GLint g = (GLint) arg0[i][GCOMP] + (GLint) arg1[i][GCOMP] -half; - GLint b = (GLint) arg0[i][BCOMP] + (GLint) arg1[i][BCOMP] -half; - r = (r < 0) ? 0 : r << RGBshift; - g = (g < 0) ? 0 : g << RGBshift; - b = (b < 0) ? 0 : b << RGBshift; - rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX); -#endif - } - } - break; - case GL_INTERPOLATE: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - const GLchan (*arg2)[4] = (const GLchan (*)[4]) argRGB[2]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - RGBshift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = (arg0[i][RCOMP] * arg2[i][RCOMP] + - arg1[i][RCOMP] * (CHAN_MAXF - arg2[i][RCOMP])) * RGBmult; - rgba[i][GCOMP] = (arg0[i][GCOMP] * arg2[i][GCOMP] + - arg1[i][GCOMP] * (CHAN_MAXF - arg2[i][GCOMP])) * RGBmult; - rgba[i][BCOMP] = (arg0[i][BCOMP] * arg2[i][BCOMP] + - arg1[i][BCOMP] * (CHAN_MAXF - arg2[i][BCOMP])) * RGBmult; -#else - GLuint r = (PROD(arg0[i][RCOMP], arg2[i][RCOMP]) - + PROD(arg1[i][RCOMP], CHAN_MAX - arg2[i][RCOMP])) - >> shift; - GLuint g = (PROD(arg0[i][GCOMP], arg2[i][GCOMP]) - + PROD(arg1[i][GCOMP], CHAN_MAX - arg2[i][GCOMP])) - >> shift; - GLuint b = (PROD(arg0[i][BCOMP], arg2[i][BCOMP]) - + PROD(arg1[i][BCOMP], CHAN_MAX - arg2[i][BCOMP])) - >> shift; - rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX); -#endif - } - } - break; - case GL_SUBTRACT: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = (arg0[i][RCOMP] - arg1[i][RCOMP]) * RGBmult; - rgba[i][GCOMP] = (arg0[i][GCOMP] - arg1[i][GCOMP]) * RGBmult; - rgba[i][BCOMP] = (arg0[i][BCOMP] - arg1[i][BCOMP]) * RGBmult; -#else - GLint r = ((GLint) arg0[i][RCOMP] - (GLint) arg1[i][RCOMP]) << RGBshift; - GLint g = ((GLint) arg0[i][GCOMP] - (GLint) arg1[i][GCOMP]) << RGBshift; - GLint b = ((GLint) arg0[i][BCOMP] - (GLint) arg1[i][BCOMP]) << RGBshift; - rgba[i][RCOMP] = (GLchan) CLAMP(r, 0, CHAN_MAX); - rgba[i][GCOMP] = (GLchan) CLAMP(g, 0, CHAN_MAX); - rgba[i][BCOMP] = (GLchan) CLAMP(b, 0, CHAN_MAX); -#endif - } - } - break; - case GL_DOT3_RGB_EXT: - case GL_DOT3_RGBA_EXT: - { - /* Do not scale the result by 1 2 or 4 */ - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - GLchan dot = ((arg0[i][RCOMP]-0.5F) * (arg1[i][RCOMP]-0.5F) + - (arg0[i][GCOMP]-0.5F) * (arg1[i][GCOMP]-0.5F) + - (arg0[i][BCOMP]-0.5F) * (arg1[i][BCOMP]-0.5F)) - * 4.0F; - dot = CLAMP(dot, 0.0F, CHAN_MAXF); -#else - GLint dot = (S_PROD((GLint)arg0[i][RCOMP] - half, - (GLint)arg1[i][RCOMP] - half) + - S_PROD((GLint)arg0[i][GCOMP] - half, - (GLint)arg1[i][GCOMP] - half) + - S_PROD((GLint)arg0[i][BCOMP] - half, - (GLint)arg1[i][BCOMP] - half)) >> 6; - dot = CLAMP(dot, 0, CHAN_MAX); -#endif - rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = (GLchan) dot; - } - } - break; - case GL_DOT3_RGB: - case GL_DOT3_RGBA: - { - /* DO scale the result by 1 2 or 4 */ - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - GLchan dot = ((arg0[i][RCOMP]-0.5F) * (arg1[i][RCOMP]-0.5F) + - (arg0[i][GCOMP]-0.5F) * (arg1[i][GCOMP]-0.5F) + - (arg0[i][BCOMP]-0.5F) * (arg1[i][BCOMP]-0.5F)) - * 4.0F * RGBmult; - dot = CLAMP(dot, 0.0, CHAN_MAXF); -#else - GLint dot = (S_PROD((GLint)arg0[i][RCOMP] - half, - (GLint)arg1[i][RCOMP] - half) + - S_PROD((GLint)arg0[i][GCOMP] - half, - (GLint)arg1[i][GCOMP] - half) + - S_PROD((GLint)arg0[i][BCOMP] - half, - (GLint)arg1[i][BCOMP] - half)) >> 6; - dot <<= RGBshift; - dot = CLAMP(dot, 0, CHAN_MAX); -#endif - rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = (GLchan) dot; - } - } - break; - case GL_MODULATE_ADD_ATI: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - const GLchan (*arg2)[4] = (const GLchan (*)[4]) argRGB[2]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - RGBshift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) + arg1[i][RCOMP]) * RGBmult; - rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) + arg1[i][GCOMP]) * RGBmult; - rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) + arg1[i][BCOMP]) * RGBmult; -#else - GLuint r = (PROD(arg0[i][RCOMP], arg2[i][RCOMP]) - + ((GLuint) arg1[i][RCOMP] << CHAN_BITS)) >> shift; - GLuint g = (PROD(arg0[i][GCOMP], arg2[i][GCOMP]) - + ((GLuint) arg1[i][GCOMP] << CHAN_BITS)) >> shift; - GLuint b = (PROD(arg0[i][BCOMP], arg2[i][BCOMP]) - + ((GLuint) arg1[i][BCOMP] << CHAN_BITS)) >> shift; - rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX); -#endif - } - } - break; - case GL_MODULATE_SIGNED_ADD_ATI: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - const GLchan (*arg2)[4] = (const GLchan (*)[4]) argRGB[2]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - RGBshift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) + arg1[i][RCOMP] - 0.5) * RGBmult; - rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) + arg1[i][GCOMP] - 0.5) * RGBmult; - rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) + arg1[i][BCOMP] - 0.5) * RGBmult; -#else - GLint r = (S_PROD(arg0[i][RCOMP], arg2[i][RCOMP]) - + (((GLint) arg1[i][RCOMP] - half) << CHAN_BITS)) - >> shift; - GLint g = (S_PROD(arg0[i][GCOMP], arg2[i][GCOMP]) - + (((GLint) arg1[i][GCOMP] - half) << CHAN_BITS)) - >> shift; - GLint b = (S_PROD(arg0[i][BCOMP], arg2[i][BCOMP]) - + (((GLint) arg1[i][BCOMP] - half) << CHAN_BITS)) - >> shift; - rgba[i][RCOMP] = (GLchan) CLAMP(r, 0, CHAN_MAX); - rgba[i][GCOMP] = (GLchan) CLAMP(g, 0, CHAN_MAX); - rgba[i][BCOMP] = (GLchan) CLAMP(b, 0, CHAN_MAX); -#endif - } - } - break; - case GL_MODULATE_SUBTRACT_ATI: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - const GLchan (*arg2)[4] = (const GLchan (*)[4]) argRGB[2]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - RGBshift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) - arg1[i][RCOMP]) * RGBmult; - rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) - arg1[i][GCOMP]) * RGBmult; - rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) - arg1[i][BCOMP]) * RGBmult; -#else - GLint r = (S_PROD(arg0[i][RCOMP], arg2[i][RCOMP]) - - ((GLint) arg1[i][RCOMP] << CHAN_BITS)) - >> shift; - GLint g = (S_PROD(arg0[i][GCOMP], arg2[i][GCOMP]) - - ((GLint) arg1[i][GCOMP] << CHAN_BITS)) - >> shift; - GLint b = (S_PROD(arg0[i][BCOMP], arg2[i][BCOMP]) - - ((GLint) arg1[i][BCOMP] << CHAN_BITS)) - >> shift; - rgba[i][RCOMP] = (GLchan) CLAMP(r, 0, CHAN_MAX); - rgba[i][GCOMP] = (GLchan) CLAMP(g, 0, CHAN_MAX); - rgba[i][BCOMP] = (GLchan) CLAMP(b, 0, CHAN_MAX); -#endif - } - } - break; - default: - _mesa_problem(ctx, "invalid combine mode"); - } - - switch (textureUnit->CombineModeA) { - case GL_REPLACE: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - if (Ashift) { - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - GLchan a = arg0[i][ACOMP] * Amult; -#else - GLuint a = (GLuint) arg0[i][ACOMP] << Ashift; -#endif - rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX); - } - } - else { - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = arg0[i][ACOMP]; - } - } - } - break; - case GL_MODULATE: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - Ashift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][ACOMP] = arg0[i][ACOMP] * arg1[i][ACOMP] * Amult; -#else - GLuint a = (PROD(arg0[i][ACOMP], arg1[i][ACOMP]) >> shift); - rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX); -#endif - } - } - break; - case GL_ADD: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][ACOMP] = (arg0[i][ACOMP] + arg1[i][ACOMP]) * Amult; -#else - GLint a = ((GLint) arg0[i][ACOMP] + arg1[i][ACOMP]) << Ashift; - rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX); -#endif - } - } - break; - case GL_ADD_SIGNED: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][ACOMP] = (arg0[i][ACOMP] + arg1[i][ACOMP] - 0.5F) * Amult; -#else - GLint a = (GLint) arg0[i][ACOMP] + (GLint) arg1[i][ACOMP] -half; - a = (a < 0) ? 0 : a << Ashift; - rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX); -#endif - } - } - break; - case GL_INTERPOLATE: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; - const GLchan (*arg2)[4] = (const GLchan (*)[4]) argA[2]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - Ashift; -#endif - for (i=0; i> shift; - rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX); -#endif - } - } - break; - case GL_SUBTRACT: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][ACOMP] = (arg0[i][ACOMP] - arg1[i][ACOMP]) * Amult; -#else - GLint a = ((GLint) arg0[i][ACOMP] - (GLint) arg1[i][ACOMP]) << Ashift; - rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX); -#endif - } - } - break; - case GL_MODULATE_ADD_ATI: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; - const GLchan (*arg2)[4] = (const GLchan (*)[4]) argA[2]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - Ashift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) + arg1[i][ACOMP]) * Amult; -#else - GLint a = (PROD(arg0[i][ACOMP], arg2[i][ACOMP]) - + ((GLuint) arg1[i][ACOMP] << CHAN_BITS)) - >> shift; - rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX); -#endif - } - } - break; - case GL_MODULATE_SIGNED_ADD_ATI: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; - const GLchan (*arg2)[4] = (const GLchan (*)[4]) argA[2]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - Ashift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) + arg1[i][ACOMP] - 0.5F) * Amult; -#else - GLint a = (S_PROD(arg0[i][ACOMP], arg2[i][ACOMP]) - + (((GLint) arg1[i][ACOMP] - half) << CHAN_BITS)) - >> shift; - rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX); -#endif - } - } - break; - case GL_MODULATE_SUBTRACT_ATI: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; - const GLchan (*arg2)[4] = (const GLchan (*)[4]) argA[2]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - Ashift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) - arg1[i][ACOMP]) * Amult; -#else - GLint a = (S_PROD(arg0[i][ACOMP], arg2[i][ACOMP]) - - ((GLint) arg1[i][ACOMP] << CHAN_BITS)) - >> shift; - rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX); -#endif - } - } - break; - default: - _mesa_problem(ctx, "invalid combine mode"); - } - - /* Fix the alpha component for GL_DOT3_RGBA_EXT/ARB combining. - * This is kind of a kludge. It would have been better if the spec - * were written such that the GL_COMBINE_ALPHA value could be set to - * GL_DOT3. - */ - if (textureUnit->CombineModeRGB == GL_DOT3_RGBA_EXT || - textureUnit->CombineModeRGB == GL_DOT3_RGBA) { - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = rgba[i][RCOMP]; - } - } - UNDEFARRAY(ccolor); /* mac 32k limitation */ -} -#undef PROD - - -/** - * Implement NVIDIA's GL_NV_texture_env_combine4 extension when - * texUnit->EnvMode == GL_COMBINE4_NV. - */ -static INLINE void -texture_combine4( const GLcontext *ctx, GLuint unit, GLuint n, - CONST GLchan (*primary_rgba)[4], - CONST GLchan *texelBuffer, - GLchan (*rgba)[4] ) -{ -} - - - -/** - * Apply a conventional OpenGL texture env mode (REPLACE, ADD, BLEND, - * MODULATE, or DECAL) to an array of fragments. - * Input: textureUnit - pointer to texture unit to apply - * format - base internal texture format - * n - number of fragments - * primary_rgba - primary colors (may alias rgba for single texture) - * texels - array of texel colors - * InOut: rgba - incoming fragment colors modified by texel colors - * according to the texture environment mode. - */ -static void -texture_apply( const GLcontext *ctx, - const struct gl_texture_unit *texUnit, - GLuint n, - CONST GLchan primary_rgba[][4], CONST GLchan texel[][4], - GLchan rgba[][4] ) -{ - GLint baseLevel; - GLuint i; - GLint Rc, Gc, Bc, Ac; - GLenum format; - - ASSERT(texUnit); - ASSERT(texUnit->_Current); - - baseLevel = texUnit->_Current->BaseLevel; - ASSERT(texUnit->_Current->Image[baseLevel]); - - format = texUnit->_Current->Image[baseLevel]->Format; - - if (format == GL_COLOR_INDEX || format == GL_YCBCR_MESA) { - format = GL_RGBA; /* a bit of a hack */ - } - else if (format == GL_DEPTH_COMPONENT) { - format = texUnit->_Current->DepthMode; - } - else if (texUnit->ColorTableEnabled) { - format = texUnit->ColorTable.Format; - } - - switch (texUnit->EnvMode) { - case GL_REPLACE: - switch (format) { - case GL_ALPHA: - for (i=0;iEnvColor[0] * CHAN_MAXF); - Gc = (GLint) (texUnit->EnvColor[1] * CHAN_MAXF); - Bc = (GLint) (texUnit->EnvColor[2] * CHAN_MAXF); - Ac = (GLint) (texUnit->EnvColor[3] * CHAN_MAXF); - switch (format) { - case GL_ALPHA: - for (i=0;iend < MAX_WIDTH); - ASSERT(span->arrayMask & SPAN_TEXTURE); - - /* - * Save copy of the incoming fragment colors (the GL_PRIMARY_COLOR) - */ - if (swrast->_AnyTextureCombine) - MEMCPY(primary_rgba, span->array->rgba, 4 * span->end * sizeof(GLchan)); - - /* - * Must do all texture sampling before combining in order to - * accomodate GL_ARB_texture_env_crossbar. - */ - for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) { - if (ctx->Texture.Unit[unit]._ReallyEnabled) { - const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; - const struct gl_texture_object *curObj = texUnit->_Current; - GLfloat *lambda = span->array->lambda[unit]; - GLchan (*texels)[4] = (GLchan (*)[4]) - (swrast->TexelBuffer + unit * (span->end * 4 * sizeof(GLchan))); - - /* adjust texture lod (lambda) */ - if (span->arrayMask & SPAN_LAMBDA) { - if (texUnit->LodBias + curObj->LodBias != 0.0F) { - /* apply LOD bias, but don't clamp yet */ - const GLfloat bias = CLAMP(texUnit->LodBias + curObj->LodBias, - -ctx->Const.MaxTextureLodBias, - ctx->Const.MaxTextureLodBias); - GLuint i; - for (i = 0; i < span->end; i++) { - lambda[i] += bias; - } - } - - if (curObj->MinLod != -1000.0 || curObj->MaxLod != 1000.0) { - /* apply LOD clamping to lambda */ - const GLfloat min = curObj->MinLod; - const GLfloat max = curObj->MaxLod; - GLuint i; - for (i = 0; i < span->end; i++) { - GLfloat l = lambda[i]; - lambda[i] = CLAMP(l, min, max); - } - } - } - - /* Sample the texture (span->end fragments) */ - swrast->TextureSample[unit]( ctx, unit, texUnit->_Current, span->end, - (const GLfloat (*)[4]) span->array->texcoords[unit], - lambda, texels ); - - /* GL_SGI_texture_color_table */ - if (texUnit->ColorTableEnabled) { - _swrast_texture_table_lookup(&texUnit->ColorTable, span->end, texels); - } - } - } - - /* - * OK, now apply the texture (aka texture combine/blend). - * We modify the span->color.rgba values. - */ - for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) { - if (ctx->Texture.Unit[unit]._ReallyEnabled) { - const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; - if (texUnit->EnvMode == GL_COMBINE) { - /* GL_ARB/EXT_texture_env_combine */ - texture_combine( ctx, unit, span->end, - (CONST GLchan (*)[4]) primary_rgba, - swrast->TexelBuffer, - span->array->rgba ); - } - else if (texUnit->EnvMode == GL_COMBINE4_NV) { - /* GL_NV_texture_env_combine4 */ - texture_combine4( ctx, unit, span->end, - (CONST GLchan (*)[4]) primary_rgba, - swrast->TexelBuffer, - span->array->rgba ); - } - else { - /* conventional texture blend */ - const GLchan (*texels)[4] = (const GLchan (*)[4]) - (swrast->TexelBuffer + unit * - (span->end * 4 * sizeof(GLchan))); - texture_apply( ctx, texUnit, span->end, - (CONST GLchan (*)[4]) primary_rgba, texels, - span->array->rgba ); - } - } + if (texObj) + _swrast_unmap_texture(ctx, texObj); } }