/*
* Mesa 3-D graphics library
- * Version: 6.5
+ * Version: 7.0.3
*
- * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
*/
-#include "glheader.h"
-#include "context.h"
-#include "colormac.h"
-#include "imports.h"
-#include "texformat.h"
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/colormac.h"
+#include "main/imports.h"
+#include "main/texformat.h"
#include "s_context.h"
#include "s_texfilter.h"
/**
- * Compute the remainder of a divided by b, but be careful with
- * negative values so that GL_REPEAT mode works right.
+ * If A is a signed integer, A % B doesn't give the right value for A < 0
+ * (in terms of texture repeat). Just casting to unsigned fixes that.
*/
-static INLINE GLint
-repeat_remainder(GLint a, GLint b)
-{
- if (a >= 0)
- return a % b;
- else
- return (a + 1) % b + b - 1;
-}
+#define REMAINDER(A, B) ((unsigned) (A) % (unsigned) (B))
/**
switch (wrapMode) { \
case GL_REPEAT: \
U = S * SIZE - 0.5F; \
- if (tObj->_IsPowerOfTwo) { \
+ if (img->_IsPowerOfTwo) { \
I0 = IFLOOR(U) & (SIZE - 1); \
I1 = (I0 + 1) & (SIZE - 1); \
} \
else { \
- I0 = repeat_remainder(IFLOOR(U), SIZE); \
- I1 = repeat_remainder(I0 + 1, SIZE); \
+ I0 = REMAINDER(IFLOOR(U), SIZE); \
+ I1 = REMAINDER(I0 + 1, SIZE); \
} \
break; \
case GL_CLAMP_TO_EDGE: \
} \
break; \
case GL_MIRROR_CLAMP_EXT: \
- U = (GLfloat) fabs(S); \
+ U = FABSF(S); \
if (U >= 1.0F) \
U = (GLfloat) SIZE; \
else \
I1 = I0 + 1; \
break; \
case GL_MIRROR_CLAMP_TO_EDGE_EXT: \
- U = (GLfloat) fabs(S); \
+ U = FABSF(S); \
if (U >= 1.0F) \
U = (GLfloat) SIZE; \
else \
{ \
const GLfloat min = -1.0F / (2.0F * SIZE); \
const GLfloat max = 1.0F - min; \
- U = (GLfloat) fabs(S); \
+ U = FABSF(S); \
if (U <= min) \
U = min * SIZE; \
else if (U >= max) \
break; \
default: \
_mesa_problem(ctx, "Bad wrap mode"); \
+ return; \
} \
}
/* s limited to [0,1) */ \
/* i limited to [0,size-1] */ \
I = IFLOOR(S * SIZE); \
- if (tObj->_IsPowerOfTwo) \
+ if (img->_IsPowerOfTwo) \
I &= (SIZE - 1); \
else \
- I = repeat_remainder(I, SIZE); \
+ I = REMAINDER(I, SIZE); \
break; \
case GL_CLAMP_TO_EDGE: \
{ \
{ \
/* s limited to [0,1] */ \
/* i limited to [0,size-1] */ \
- const GLfloat u = (GLfloat) fabs(S); \
+ const GLfloat u = FABSF(S); \
if (u <= 0.0F) \
I = 0; \
else if (u >= 1.0F) \
/* 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); \
+ const GLfloat u = FABSF(S); \
if (u < min) \
I = 0; \
else if (u > 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); \
+ const GLfloat u = FABSF(S); \
if (u < min) \
I = -1; \
else if (u > max) \
break; \
default: \
_mesa_problem(ctx, "Bad wrap mode"); \
+ return; \
} \
}
}
#endif /* DEBUG */
- if (lambda[0] <= minMagThresh && lambda[n-1] <= minMagThresh) {
+ if (lambda[0] <= minMagThresh && (n <= 1 || lambda[n-1] <= minMagThresh)) {
/* magnification for whole span */
*magStart = 0;
*magEnd = n;
*minStart = *minEnd = 0;
}
- else if (lambda[0] > minMagThresh && lambda[n-1] > minMagThresh) {
+ else if (lambda[0] > minMagThresh && (n <=1 || lambda[n-1] > minMagThresh)) {
/* minification for whole span */
*minStart = 0;
*minEnd = n;
GLfloat a, b;
GLchan t00[4], t10[4], t01[4], t11[4]; /* sampled texel colors */
+ (void) ctx;
+
ASSERT(tObj->WrapS == GL_REPEAT);
ASSERT(tObj->WrapT == GL_REPEAT);
ASSERT(img->Border == 0);
- ASSERT(img->Format != GL_COLOR_INDEX);
+ ASSERT(img->TexFormat->BaseFormat != GL_COLOR_INDEX);
ASSERT(img->_IsPowerOfTwo);
COMPUTE_LINEAR_REPEAT_TEXEL_LOCATION(texcoord[0], u, width, i0, i1);
ASSERT(lambda != NULL);
ASSERT(tObj->WrapS == GL_REPEAT);
ASSERT(tObj->WrapT == GL_REPEAT);
- ASSERT(tObj->_IsPowerOfTwo);
for (i = 0; i < n; i++) {
GLint level = linear_mipmap_level(tObj, lambda[i]);
if (level >= tObj->_MaxLevel) {
GLuint i;
struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel];
(void) lambda;
- if (tObj->WrapS == GL_REPEAT && tObj->WrapT == GL_REPEAT) {
+ if (tObj->WrapS == GL_REPEAT &&
+ tObj->WrapT == GL_REPEAT &&
+ image->_IsPowerOfTwo &&
+ image->Border == 0) {
for (i=0;i<n;i++) {
sample_2d_linear_repeat(ctx, tObj, image, texcoords[i], rgba[i]);
}
ASSERT(tObj->WrapS==GL_REPEAT);
ASSERT(tObj->WrapT==GL_REPEAT);
ASSERT(img->Border==0);
- ASSERT(img->Format==GL_RGB);
+ ASSERT(img->TexFormat->MesaFormat==MESA_FORMAT_RGB);
ASSERT(img->_IsPowerOfTwo);
for (k=0; k<n; k++) {
ASSERT(tObj->WrapS==GL_REPEAT);
ASSERT(tObj->WrapT==GL_REPEAT);
ASSERT(img->Border==0);
- ASSERT(img->Format==GL_RGBA);
+ ASSERT(img->TexFormat->MesaFormat==MESA_FORMAT_RGBA);
ASSERT(img->_IsPowerOfTwo);
for (i = 0; i < n; i++) {
const GLboolean repeatNoBorderPOT = (tObj->WrapS == GL_REPEAT)
&& (tObj->WrapT == GL_REPEAT)
&& (tImg->Border == 0 && (tImg->Width == tImg->RowStride))
- && (tImg->Format != GL_COLOR_INDEX)
+ && (tImg->TexFormat->BaseFormat != GL_COLOR_INDEX)
&& tImg->_IsPowerOfTwo;
ASSERT(lambda != NULL);
if (repeatNoBorderPOT) {
switch (tImg->TexFormat->MesaFormat) {
case MESA_FORMAT_RGB:
- case MESA_FORMAT_RGB888:
- /*case MESA_FORMAT_BGR888:*/
opt_sample_rgb_2d(ctx, tObj, m, texcoords + minStart,
NULL, rgba + minStart);
break;
case MESA_FORMAT_RGBA:
- case MESA_FORMAT_RGBA8888:
- case MESA_FORMAT_ARGB8888:
- /*case MESA_FORMAT_ABGR8888:*/
- /*case MESA_FORMAT_BGRA8888:*/
opt_sample_rgba_2d(ctx, tObj, m, texcoords + minStart,
NULL, rgba + minStart);
break;
if (repeatNoBorderPOT) {
switch (tImg->TexFormat->MesaFormat) {
case MESA_FORMAT_RGB:
- case MESA_FORMAT_RGB888:
- /*case MESA_FORMAT_BGR888:*/
opt_sample_rgb_2d(ctx, tObj, m, texcoords + magStart,
NULL, rgba + magStart);
break;
case MESA_FORMAT_RGBA:
- case MESA_FORMAT_RGBA8888:
- case MESA_FORMAT_ARGB8888:
- /*case MESA_FORMAT_ABGR8888:*/
- /*case MESA_FORMAT_BGRA8888:*/
opt_sample_rgba_2d(ctx, tObj, m, texcoords + magStart,
NULL, rgba + magStart);
break;
for (i = 0; i < n; i++) {
const struct gl_texture_image **images;
GLfloat newCoord[4];
- GLint level = nearest_mipmap_level(tObj, lambda[i]);
+ GLint level;
images = choose_cube_face(tObj, texcoord[i], newCoord);
+
+ /* XXX we actually need to recompute lambda here based on the newCoords.
+ * But we would need the texcoords of adjacent fragments to compute that
+ * properly, and we don't have those here.
+ * For now, do an approximation: subtracting 1 from the chosen mipmap
+ * level seems to work in some test cases.
+ * The same adjustment is done in the next few functions.
+ */
+ level = nearest_mipmap_level(tObj, lambda[i]);
+ level = MAX2(level - 1, 0);
+
sample_2d_nearest(ctx, tObj, images[level], newCoord, rgba[i]);
}
}
const struct gl_texture_image **images;
GLfloat newCoord[4];
GLint level = nearest_mipmap_level(tObj, lambda[i]);
+ level = MAX2(level - 1, 0); /* see comment above */
images = choose_cube_face(tObj, texcoord[i], newCoord);
sample_2d_linear(ctx, tObj, images[level], newCoord, rgba[i]);
}
const struct gl_texture_image **images;
GLfloat newCoord[4];
GLint level = linear_mipmap_level(tObj, lambda[i]);
+ level = MAX2(level - 1, 0); /* see comment above */
images = choose_cube_face(tObj, texcoord[i], newCoord);
if (level >= tObj->_MaxLevel) {
sample_2d_nearest(ctx, tObj, images[tObj->_MaxLevel],
const struct gl_texture_image **images;
GLfloat newCoord[4];
GLint level = linear_mipmap_level(tObj, lambda[i]);
+ level = MAX2(level - 1, 0); /* see comment above */
images = choose_cube_face(tObj, texcoord[i], newCoord);
if (level >= tObj->_MaxLevel) {
sample_2d_linear(ctx, tObj, images[tObj->_MaxLevel],
/* Texture Rectangle Sampling Functions */
/**********************************************************************/
+
+/**
+ * Do clamp/wrap for a texture rectangle coord, GL_NEAREST filter mode.
+ */
+static INLINE GLint
+clamp_rect_coord_nearest(GLenum wrapMode, GLfloat coord, GLint max)
+{
+ if (wrapMode == GL_CLAMP) {
+ return IFLOOR( CLAMP(coord, 0.0F, max - 1) );
+ }
+ else if (wrapMode == GL_CLAMP_TO_EDGE) {
+ return IFLOOR( CLAMP(coord, 0.5F, max - 0.5F) );
+ }
+ else {
+ return IFLOOR( CLAMP(coord, -0.5F, max + 0.5F) );
+ }
+}
+
+
+/*
+ * As above, but GL_LINEAR filtering.
+ */
+static INLINE void
+clamp_rect_coord_linear(GLenum wrapMode, GLfloat coord, GLint max,
+ GLint *i0out, GLint *i1out)
+{
+ GLfloat fcol;
+ GLint i0, i1;
+ if (wrapMode == GL_CLAMP) {
+ /* Not exactly what the spec says, but it matches NVIDIA output */
+ fcol = CLAMP(coord - 0.5F, 0.0, max-1);
+ i0 = IFLOOR(fcol);
+ i1 = i0 + 1;
+ }
+ else if (wrapMode == GL_CLAMP_TO_EDGE) {
+ fcol = CLAMP(coord, 0.5F, max - 0.5F);
+ fcol -= 0.5F;
+ i0 = IFLOOR(fcol);
+ i1 = i0 + 1;
+ if (i1 > max - 1)
+ i1 = max - 1;
+ }
+ else {
+ ASSERT(wrapMode == GL_CLAMP_TO_BORDER);
+ fcol = CLAMP(coord, -0.5F, max + 0.5F);
+ fcol -= 0.5F;
+ i0 = IFLOOR(fcol);
+ i1 = i0 + 1;
+ }
+ *i0out = i0;
+ *i1out = i1;
+}
+
+
static void
sample_nearest_rect(GLcontext *ctx,
const struct gl_texture_object *tObj, GLuint n,
ASSERT(tObj->WrapT == GL_CLAMP ||
tObj->WrapT == GL_CLAMP_TO_EDGE ||
tObj->WrapT == GL_CLAMP_TO_BORDER);
- ASSERT(img->Format != GL_COLOR_INDEX);
+ ASSERT(img->TexFormat->BaseFormat != 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 - 1) );
- }
- 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 - 1) );
- }
- 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_rect_coord_nearest(tObj->WrapS, texcoords[i][0], width);
+ row = clamp_rect_coord_nearest(tObj->WrapT, texcoords[i][1], height);
if (col < 0 || col > width_minus_1 || row < 0 || row > height_minus_1)
COPY_CHAN4(rgba[i], tObj->_BorderChan);
else
ASSERT(tObj->WrapT == GL_CLAMP ||
tObj->WrapT == GL_CLAMP_TO_EDGE ||
tObj->WrapT == GL_CLAMP_TO_BORDER);
- ASSERT(img->Format != GL_COLOR_INDEX);
+ ASSERT(img->TexFormat->BaseFormat != GL_COLOR_INDEX);
/* XXX lots of opportunity for optimization in this loop */
for (i = 0; i < n; i++) {
+/**********************************************************************/
+/* 2D Texture Array Sampling Functions */
+/**********************************************************************/
+
/*
- * Sample a shadow/depth texture.
+ * Return the texture sample for coordinate (s,t,r) using GL_NEAREST filter.
*/
static void
-sample_depth_texture( GLcontext *ctx,
- const struct gl_texture_object *tObj, GLuint n,
- const GLfloat texcoords[][4], const GLfloat lambda[],
- GLchan texel[][4] )
+sample_2d_array_nearest(GLcontext *ctx,
+ const struct gl_texture_object *tObj,
+ const struct gl_texture_image *img,
+ const GLfloat texcoord[4],
+ GLchan rgba[4])
{
- const GLint baseLevel = tObj->BaseLevel;
- const struct gl_texture_image *texImage = tObj->Image[0][baseLevel];
- const GLuint width = texImage->Width;
- const GLuint height = texImage->Height;
- GLchan ambient;
- GLenum function;
- GLchan result;
+ const GLint width = img->Width2; /* without border, power of two */
+ const GLint height = img->Height2; /* without border, power of two */
+ const GLint depth = img->Depth;
+ GLint i, j;
+ GLint array;
+ (void) ctx;
- (void) lambda;
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapS, texcoord[0], width, i);
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapT, texcoord[1], height, j);
+ array = clamp_rect_coord_nearest(tObj->WrapR, texcoord[2], depth);
- ASSERT(tObj->Image[0][tObj->BaseLevel]->Format == GL_DEPTH_COMPONENT);
- ASSERT(tObj->Target == GL_TEXTURE_1D ||
- tObj->Target == GL_TEXTURE_2D ||
- tObj->Target == GL_TEXTURE_RECTANGLE_NV);
+ if (i < 0 || i >= (GLint) img->Width ||
+ j < 0 || j >= (GLint) img->Height ||
+ array < 0 || array >= (GLint) img->Depth) {
+ /* Need this test for GL_CLAMP_TO_BORDER mode */
+ COPY_CHAN4(rgba, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i, j, array, rgba);
+ }
+}
- 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;
+/*
+ * Return the texture sample for coordinate (s,t,r) using GL_LINEAR filter.
+ */
+static void
+sample_2d_array_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->Depth;
+ GLint i0, j0, i1, j1;
+ GLint array;
+ GLbitfield useBorderColor = 0x0;
+ GLfloat u, v;
+ GLfloat a, b;
+ GLchan t00[4], t01[4], t10[4], t11[4];
+
+ COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapS, texcoord[0], u, width, i0, i1);
+ COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapT, texcoord[1], v, height, j0, j1);
+ array = clamp_rect_coord_nearest(tObj->WrapR, texcoord[2], depth);
+
+ if (array < 0 || array >= depth) {
+ COPY_CHAN4(rgba, tObj->_BorderChan);
+ }
+ else {
+ if (img->Border) {
+ i0 += img->Border;
+ i1 += img->Border;
+ j0 += img->Border;
+ j1 += img->Border;
}
else {
- ASSERT(tObj->CompareOperator == GL_TEXTURE_GEQUAL_R_SGIX);
- function = GL_GEQUAL;
+ /* 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;
}
+
+ /* Fetch texels */
+ if (useBorderColor & (I0BIT | J0BIT)) {
+ COPY_CHAN4(t00, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i0, j0, array, t00);
+ }
+ if (useBorderColor & (I1BIT | J0BIT)) {
+ COPY_CHAN4(t10, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i1, j0, array, t10);
+ }
+ if (useBorderColor & (I0BIT | J1BIT)) {
+ COPY_CHAN4(t01, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i0, j1, array, t01);
+ }
+ if (useBorderColor & (I1BIT | J1BIT)) {
+ COPY_CHAN4(t11, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i1, j1, array, t11);
+ }
+
+ /* trilinear interpolation of samples */
+ a = FRAC(u);
+ b = FRAC(v);
+ lerp_rgba_2d(rgba, a, b, t00, t10, t01, t11);
}
- 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 */
+}
+
+
+
+static void
+sample_2d_array_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 = nearest_mipmap_level(tObj, lambda[i]);
+ sample_2d_array_nearest(ctx, tObj, tObj->Image[0][level], texcoord[i],
+ rgba[i]);
}
+}
- 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);
- texImage->FetchTexelf(texImage, col, row, 0, &depthSample);
- 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;
- }
+static void
+sample_2d_array_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 = nearest_mipmap_level(tObj, lambda[i]);
+ sample_2d_array_linear(ctx, tObj, tObj->Image[0][level],
+ texcoord[i], rgba[i]);
+ }
+}
- 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");
- }
+
+static void
+sample_2d_array_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 = linear_mipmap_level(tObj, lambda[i]);
+ if (level >= tObj->_MaxLevel) {
+ sample_2d_array_nearest(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLchan t0[4], t1[4]; /* texels */
+ const GLfloat f = FRAC(lambda[i]);
+ sample_2d_array_nearest(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0);
+ sample_2d_array_nearest(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1);
+ lerp_rgba(rgba[i], f, t0, t1);
}
}
- 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;
- }
+static void
+sample_2d_array_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 = linear_mipmap_level(tObj, lambda[i]);
+ if (level >= tObj->_MaxLevel) {
+ sample_2d_array_linear(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLchan t0[4], t1[4]; /* texels */
+ const GLfloat f = FRAC(lambda[i]);
+ sample_2d_array_linear(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0);
+ sample_2d_array_linear(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1);
+ lerp_rgba(rgba[i], f, t0, t1);
+ }
+ }
+}
- /* get four depth samples from the texture */
- if (useBorderTexel & (I0BIT | J0BIT)) {
- depth00 = 1.0;
- }
- else {
- texImage->FetchTexelf(texImage, i0, j0, 0, &depth00);
- }
- if (useBorderTexel & (I1BIT | J0BIT)) {
- depth10 = 1.0;
- }
- else {
- texImage->FetchTexelf(texImage, i1, j0, 0, &depth10);
- }
- if (useBorderTexel & (I0BIT | J1BIT)) {
- depth01 = 1.0;
- }
- else {
- texImage->FetchTexelf(texImage, i0, j1, 0, &depth01);
- }
- if (useBorderTexel & (I1BIT | J1BIT)) {
- depth11 = 1.0;
- }
- else {
- texImage->FetchTexelf(texImage, i1, j1, 0, &depth11);
- }
- 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 depthSample
- = lerp_2d(a, b, depth00, depth10, depth01, depth11);
- if ((depthSample <= texcoords[i][2] && function == GL_LEQUAL) ||
- (depthSample >= texcoords[i][2] && function == GL_GEQUAL)) {
+static void
+sample_nearest_2d_array(GLcontext *ctx,
+ 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[0][tObj->BaseLevel];
+ (void) lambda;
+ for (i=0;i<n;i++) {
+ sample_2d_array_nearest(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+
+static void
+sample_linear_2d_array(GLcontext *ctx,
+ 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[0][tObj->BaseLevel];
+ (void) lambda;
+ for (i=0;i<n;i++) {
+ sample_2d_array_linear(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+/*
+ * Given an (s,t,r) texture coordinate and lambda (level of detail) value,
+ * return a texture sample.
+ */
+static void
+sample_lambda_2d_array(GLcontext *ctx,
+ 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 */
+ GLuint i;
+
+ ASSERT(lambda != NULL);
+ compute_min_mag_ranges(tObj, 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_2d_array_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_LINEAR:
+ for (i = minStart; i < minEnd; i++)
+ sample_2d_array_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_NEAREST_MIPMAP_NEAREST:
+ sample_2d_array_nearest_mipmap_nearest(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_NEAREST:
+ sample_2d_array_linear_mipmap_nearest(ctx, tObj, m,
+ texcoords + minStart,
+ lambda + minStart,
+ rgba + minStart);
+ break;
+ case GL_NEAREST_MIPMAP_LINEAR:
+ sample_2d_array_nearest_mipmap_linear(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_LINEAR:
+ sample_2d_array_linear_mipmap_linear(ctx, tObj, m,
+ texcoords + minStart,
+ lambda + minStart,
+ rgba + minStart);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad min filter in sample_2d_array_texture");
+ return;
+ }
+ }
+
+ if (magStart < magEnd) {
+ /* do the magnified texels */
+ switch (tObj->MagFilter) {
+ case GL_NEAREST:
+ for (i = magStart; i < magEnd; i++)
+ sample_2d_array_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_LINEAR:
+ for (i = magStart; i < magEnd; i++)
+ sample_2d_array_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad mag filter in sample_2d_array_texture");
+ return;
+ }
+ }
+}
+
+
+
+
+/**********************************************************************/
+/* 1D Texture Array Sampling Functions */
+/**********************************************************************/
+
+/*
+ * Return the texture sample for coordinate (s,t,r) using GL_NEAREST filter.
+ */
+static void
+sample_1d_array_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->Height;
+ GLint i;
+ GLint array;
+ (void) ctx;
+
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapS, texcoord[0], width, i);
+ array = clamp_rect_coord_nearest(tObj->WrapT, texcoord[1], height);
+
+ if (i < 0 || i >= (GLint) img->Width ||
+ array < 0 || array >= (GLint) img->Height) {
+ /* Need this test for GL_CLAMP_TO_BORDER mode */
+ COPY_CHAN4(rgba, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i, array, 0, rgba);
+ }
+}
+
+
+
+/*
+ * Return the texture sample for coordinate (s,t,r) using GL_LINEAR filter.
+ */
+static void
+sample_1d_array_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->Height;
+ GLint i0, i1;
+ GLint array;
+ GLbitfield useBorderColor = 0x0;
+ GLfloat u;
+ GLfloat a;
+ GLchan t0[4], t1[4];
+
+ COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapS, texcoord[0], u, width, i0, i1);
+ array = clamp_rect_coord_nearest(tObj->WrapT, texcoord[1], height);
+
+ if (img->Border) {
+ i0 += img->Border;
+ i1 += img->Border;
+ }
+ else {
+ /* check if sampling texture border color */
+ if (i0 < 0 || i0 >= width) useBorderColor |= I0BIT;
+ if (i1 < 0 || i1 >= width) useBorderColor |= I1BIT;
+ }
+
+ if (array < 0 || array >= height) useBorderColor |= K0BIT;
+
+ /* Fetch texels */
+ if (useBorderColor & (I0BIT | K0BIT)) {
+ COPY_CHAN4(t0, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i0, array, 0, t0);
+ }
+ if (useBorderColor & (I1BIT | K0BIT)) {
+ COPY_CHAN4(t1, tObj->_BorderChan);
+ }
+ else {
+ img->FetchTexelc(img, i1, array, 0, t1);
+ }
+
+ /* bilinear interpolation of samples */
+ a = FRAC(u);
+ lerp_rgba(rgba, a, t0, t1);
+}
+
+
+
+static void
+sample_1d_array_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 = nearest_mipmap_level(tObj, lambda[i]);
+ sample_1d_array_nearest(ctx, tObj, tObj->Image[0][level], texcoord[i],
+ rgba[i]);
+ }
+}
+
+
+static void
+sample_1d_array_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 = nearest_mipmap_level(tObj, lambda[i]);
+ sample_1d_array_linear(ctx, tObj, tObj->Image[0][level],
+ texcoord[i], rgba[i]);
+ }
+}
+
+
+static void
+sample_1d_array_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 = linear_mipmap_level(tObj, lambda[i]);
+ if (level >= tObj->_MaxLevel) {
+ sample_1d_array_nearest(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLchan t0[4], t1[4]; /* texels */
+ const GLfloat f = FRAC(lambda[i]);
+ sample_1d_array_nearest(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0);
+ sample_1d_array_nearest(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1);
+ lerp_rgba(rgba[i], f, t0, t1);
+ }
+ }
+}
+
+
+static void
+sample_1d_array_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 = linear_mipmap_level(tObj, lambda[i]);
+ if (level >= tObj->_MaxLevel) {
+ sample_1d_array_linear(ctx, tObj, tObj->Image[0][tObj->_MaxLevel],
+ texcoord[i], rgba[i]);
+ }
+ else {
+ GLchan t0[4], t1[4]; /* texels */
+ const GLfloat f = FRAC(lambda[i]);
+ sample_1d_array_linear(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0);
+ sample_1d_array_linear(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1);
+ lerp_rgba(rgba[i], f, t0, t1);
+ }
+ }
+}
+
+
+static void
+sample_nearest_1d_array(GLcontext *ctx,
+ 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[0][tObj->BaseLevel];
+ (void) lambda;
+ for (i=0;i<n;i++) {
+ sample_1d_array_nearest(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+
+static void
+sample_linear_1d_array(GLcontext *ctx,
+ 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[0][tObj->BaseLevel];
+ (void) lambda;
+ for (i=0;i<n;i++) {
+ sample_1d_array_linear(ctx, tObj, image, texcoords[i], rgba[i]);
+ }
+}
+
+
+/*
+ * Given an (s,t,r) texture coordinate and lambda (level of detail) value,
+ * return a texture sample.
+ */
+static void
+sample_lambda_1d_array(GLcontext *ctx,
+ 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 */
+ GLuint i;
+
+ ASSERT(lambda != NULL);
+ compute_min_mag_ranges(tObj, 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_1d_array_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_LINEAR:
+ for (i = minStart; i < minEnd; i++)
+ sample_1d_array_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_NEAREST_MIPMAP_NEAREST:
+ sample_1d_array_nearest_mipmap_nearest(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_NEAREST:
+ sample_1d_array_linear_mipmap_nearest(ctx, tObj, m,
+ texcoords + minStart,
+ lambda + minStart,
+ rgba + minStart);
+ break;
+ case GL_NEAREST_MIPMAP_LINEAR:
+ sample_1d_array_nearest_mipmap_linear(ctx, tObj, m, texcoords + minStart,
+ lambda + minStart, rgba + minStart);
+ break;
+ case GL_LINEAR_MIPMAP_LINEAR:
+ sample_1d_array_linear_mipmap_linear(ctx, tObj, m,
+ texcoords + minStart,
+ lambda + minStart,
+ rgba + minStart);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad min filter in sample_1d_array_texture");
+ return;
+ }
+ }
+
+ if (magStart < magEnd) {
+ /* do the magnified texels */
+ switch (tObj->MagFilter) {
+ case GL_NEAREST:
+ for (i = magStart; i < magEnd; i++)
+ sample_1d_array_nearest(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ case GL_LINEAR:
+ for (i = magStart; i < magEnd; i++)
+ sample_1d_array_linear(ctx, tObj, tObj->Image[0][tObj->BaseLevel],
+ texcoords[i], rgba[i]);
+ break;
+ default:
+ _mesa_problem(ctx, "Bad mag filter in sample_1d_array_texture");
+ return;
+ }
+ }
+}
+
+
+
+
+/*
+ * Sample a shadow/depth texture.
+ */
+static void
+sample_depth_texture( GLcontext *ctx,
+ 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 *img = tObj->Image[0][baseLevel];
+ const GLint width = img->Width;
+ const GLint height = img->Height;
+ const GLint depth = img->Depth;
+ const GLuint compare_coord = (tObj->Target == GL_TEXTURE_2D_ARRAY_EXT)
+ ? 3 : 2;
+ GLchan ambient;
+ GLenum function;
+ GLchan result;
+
+ (void) lambda;
+
+ ASSERT(img->TexFormat->BaseFormat == GL_DEPTH_COMPONENT ||
+ img->TexFormat->BaseFormat == GL_DEPTH_STENCIL_EXT);
+
+ ASSERT(tObj->Target == GL_TEXTURE_1D ||
+ tObj->Target == GL_TEXTURE_2D ||
+ tObj->Target == GL_TEXTURE_RECTANGLE_NV ||
+ tObj->Target == GL_TEXTURE_1D_ARRAY_EXT ||
+ tObj->Target == GL_TEXTURE_2D_ARRAY_EXT);
+
+ UNCLAMPED_FLOAT_TO_CHAN(ambient, tObj->ShadowAmbient);
+
+ /* XXXX if tObj->MinFilter != tObj->MagFilter, we're ignoring lambda */
+
+ function = tObj->_Function;
+ if (tObj->MagFilter == GL_NEAREST) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ GLfloat depthSample;
+ GLint col, row, slice;
+
+ switch (tObj->Target) {
+ case GL_TEXTURE_RECTANGLE_ARB:
+ col = clamp_rect_coord_nearest(tObj->WrapS, texcoords[i][0], width);
+ row = clamp_rect_coord_nearest(tObj->WrapT, texcoords[i][1], height);
+ slice = 0;
+ break;
+
+ case GL_TEXTURE_1D:
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapS, texcoords[i][0],
+ width, col);
+ row = 0;
+ slice = 0;
+ break;
+
+ case GL_TEXTURE_2D:
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapS, texcoords[i][0],
+ width, col);
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapT, texcoords[i][1],
+ height, row);
+ slice = 0;
+ break;
+
+ case GL_TEXTURE_1D_ARRAY_EXT:
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapS, texcoords[i][0],
+ width, col);
+ row = clamp_rect_coord_nearest(tObj->WrapT, texcoords[i][1], height);
+ slice = 0;
+
+ case GL_TEXTURE_2D_ARRAY_EXT:
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapS, texcoords[i][0],
+ width, col);
+ COMPUTE_NEAREST_TEXEL_LOCATION(tObj->WrapT, texcoords[i][1],
+ height, row);
+ slice = clamp_rect_coord_nearest(tObj->WrapR, texcoords[i][2], depth);
+ break;
+ }
+
+ if (col >= 0 && row >= 0 && col < width && row < height &&
+ slice >= 0 && slice < depth) {
+ img->FetchTexelf(img, col, row, slice, &depthSample);
+ }
+ else {
+ depthSample = tObj->BorderColor[0];
+ }
+
+ switch (function) {
+ case GL_LEQUAL:
+ result = (texcoords[i][compare_coord] <= depthSample) ? CHAN_MAX : ambient;
+ break;
+ case GL_GEQUAL:
+ result = (texcoords[i][compare_coord] >= depthSample) ? CHAN_MAX : ambient;
+ break;
+ case GL_LESS:
+ result = (texcoords[i][compare_coord] < depthSample) ? CHAN_MAX : ambient;
+ break;
+ case GL_GREATER:
+ result = (texcoords[i][compare_coord] > depthSample) ? CHAN_MAX : ambient;
+ break;
+ case GL_EQUAL:
+ result = (texcoords[i][compare_coord] == depthSample) ? CHAN_MAX : ambient;
+ break;
+ case GL_NOTEQUAL:
+ result = (texcoords[i][compare_coord] != 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;
+ GLint slice;
+ GLfloat u, v;
+ GLuint useBorderTexel;
+
+ switch (tObj->Target) {
+ case GL_TEXTURE_RECTANGLE_ARB:
+ clamp_rect_coord_linear(tObj->WrapS, texcoords[i][0],
+ width, &i0, &i1);
+ clamp_rect_coord_linear(tObj->WrapT, texcoords[i][1],
+ height, &j0, &j1);
+ slice = 0;
+ break;
+
+ case GL_TEXTURE_1D:
+ case GL_TEXTURE_2D:
+ 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);
+ slice = 0;
+ break;
+
+ case GL_TEXTURE_1D_ARRAY_EXT:
+ COMPUTE_LINEAR_TEXEL_LOCATIONS(tObj->WrapS, texcoords[i][0],
+ u, width, i0, i1);
+ j0 = clamp_rect_coord_nearest(tObj->WrapT, texcoords[i][1], height);
+ j1 = j0;
+ slice = 0;
+
+ case GL_TEXTURE_2D_ARRAY_EXT:
+ 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);
+ slice = clamp_rect_coord_nearest(tObj->WrapR, texcoords[i][2], depth);
+ break;
+ }
+
+ useBorderTexel = 0;
+ if (img->Border) {
+ i0 += img->Border;
+ i1 += img->Border;
+ if (tObj->Target != GL_TEXTURE_1D_ARRAY_EXT) {
+ j0 += img->Border;
+ j1 += img->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;
+ }
+
+ if (slice < 0 || slice >= (GLint) depth) {
+ depth00 = tObj->BorderColor[0];
+ depth01 = tObj->BorderColor[0];
+ depth10 = tObj->BorderColor[0];
+ depth11 = tObj->BorderColor[0];
+ }
+ else {
+ /* get four depth samples from the texture */
+ if (useBorderTexel & (I0BIT | J0BIT)) {
+ depth00 = tObj->BorderColor[0];
+ }
+ else {
+ img->FetchTexelf(img, i0, j0, slice, &depth00);
+ }
+ if (useBorderTexel & (I1BIT | J0BIT)) {
+ depth10 = tObj->BorderColor[0];
+ }
+ else {
+ img->FetchTexelf(img, i1, j0, slice, &depth10);
+ }
+
+ if (tObj->Target != GL_TEXTURE_1D_ARRAY_EXT) {
+ if (useBorderTexel & (I0BIT | J1BIT)) {
+ depth01 = tObj->BorderColor[0];
+ }
+ else {
+ img->FetchTexelf(img, i0, j1, slice, &depth01);
+ }
+ if (useBorderTexel & (I1BIT | J1BIT)) {
+ depth11 = tObj->BorderColor[0];
+ }
+ else {
+ img->FetchTexelf(img, i1, j1, slice, &depth11);
+ }
+ }
+ else {
+ depth01 = depth00;
+ depth11 = depth10;
+ }
+ }
+
+ 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 depthSample
+ = lerp_2d(a, b, depth00, depth10, depth01, depth11);
+ if ((depthSample <= texcoords[i][compare_coord] && function == GL_LEQUAL) ||
+ (depthSample >= texcoords[i][compare_coord] && function == GL_GEQUAL)) {
result = ambient;
}
else {
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;
+ if (depth00 <= texcoords[i][compare_coord]) luminance -= d;
+ if (depth01 <= texcoords[i][compare_coord]) luminance -= d;
+ if (depth10 <= texcoords[i][compare_coord]) luminance -= d;
+ if (depth11 <= texcoords[i][compare_coord]) 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;
+ if (depth00 >= texcoords[i][compare_coord]) luminance -= d;
+ if (depth01 >= texcoords[i][compare_coord]) luminance -= d;
+ if (depth10 >= texcoords[i][compare_coord]) luminance -= d;
+ if (depth11 >= texcoords[i][compare_coord]) 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;
+ if (depth00 < texcoords[i][compare_coord]) luminance -= d;
+ if (depth01 < texcoords[i][compare_coord]) luminance -= d;
+ if (depth10 < texcoords[i][compare_coord]) luminance -= d;
+ if (depth11 < texcoords[i][compare_coord]) 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;
+ if (depth00 > texcoords[i][compare_coord]) luminance -= d;
+ if (depth01 > texcoords[i][compare_coord]) luminance -= d;
+ if (depth10 > texcoords[i][compare_coord]) luminance -= d;
+ if (depth11 > texcoords[i][compare_coord]) 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;
+ if (depth00 == texcoords[i][compare_coord]) luminance -= d;
+ if (depth01 == texcoords[i][compare_coord]) luminance -= d;
+ if (depth10 == texcoords[i][compare_coord]) luminance -= d;
+ if (depth11 == texcoords[i][compare_coord]) 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;
+ if (depth00 != texcoords[i][compare_coord]) luminance -= d;
+ if (depth01 != texcoords[i][compare_coord]) luminance -= d;
+ if (depth10 != texcoords[i][compare_coord]) luminance -= d;
+ if (depth11 != texcoords[i][compare_coord]) luminance -= d;
result = (GLchan) luminance;
break;
case GL_ALWAYS:
* GL_TEXTURE_COMPARE_SGIX == GL_TRUE but the current texture object
* isn't a depth texture.
*/
- if (texImage->Format != GL_DEPTH_COMPONENT) {
+ if (texImage->TexFormat->BaseFormat != GL_DEPTH_COMPONENT) {
_mesa_problem(ctx,"GL_TEXTURE_COMPARE_SGIX enabled with non-depth texture");
return;
}
* 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 (see issue 23 in GL_ARB_fragment_program spec).
- * Note: fragment programss don't observe the texture enable/disable flags.
+ * Note: fragment programs don't observe the texture enable/disable flags.
*/
static void
null_sample_func( GLcontext *ctx,
_swrast_choose_texture_sample_func( GLcontext *ctx,
const struct gl_texture_object *t )
{
- if (!t || !t->Complete) {
+ if (!t || !t->_Complete) {
return &null_sample_func;
}
else {
const GLboolean needLambda = (GLboolean) (t->MinFilter != t->MagFilter);
- const GLenum format = t->Image[0][t->BaseLevel]->Format;
+ const GLenum format = t->Image[0][t->BaseLevel]->TexFormat->BaseFormat;
switch (t->Target) {
case GL_TEXTURE_1D:
- if (format == GL_DEPTH_COMPONENT) {
+ if (format == GL_DEPTH_COMPONENT || format == GL_DEPTH_STENCIL_EXT) {
return &sample_depth_texture;
}
else if (needLambda) {
return &sample_nearest_1d;
}
case GL_TEXTURE_2D:
- if (format == GL_DEPTH_COMPONENT) {
+ if (format == GL_DEPTH_COMPONENT || format == GL_DEPTH_STENCIL_EXT) {
return &sample_depth_texture;
}
else if (needLambda) {
return &sample_linear_2d;
}
else {
- GLint baseLevel = t->BaseLevel;
+ /* check for a few optimized cases */
+ const struct gl_texture_image *img = t->Image[0][t->BaseLevel];
ASSERT(t->MinFilter == GL_NEAREST);
if (t->WrapS == GL_REPEAT &&
t->WrapT == GL_REPEAT &&
- t->_IsPowerOfTwo &&
- t->Image[0][baseLevel]->Border == 0 &&
- t->Image[0][baseLevel]->TexFormat->MesaFormat == MESA_FORMAT_RGB) {
+ img->_IsPowerOfTwo &&
+ img->Border == 0 &&
+ img->TexFormat->MesaFormat == MESA_FORMAT_RGB) {
return &opt_sample_rgb_2d;
}
else if (t->WrapS == GL_REPEAT &&
t->WrapT == GL_REPEAT &&
- t->_IsPowerOfTwo &&
- t->Image[0][baseLevel]->Border == 0 &&
- t->Image[0][baseLevel]->TexFormat->MesaFormat == MESA_FORMAT_RGBA) {
+ img->_IsPowerOfTwo &&
+ img->Border == 0 &&
+ img->TexFormat->MesaFormat == MESA_FORMAT_RGBA) {
return &opt_sample_rgba_2d;
}
else {
return &sample_nearest_cube;
}
case GL_TEXTURE_RECTANGLE_NV:
- if (needLambda) {
+ if (format == GL_DEPTH_COMPONENT || format == GL_DEPTH_STENCIL_EXT) {
+ return &sample_depth_texture;
+ }
+ else if (needLambda) {
return &sample_lambda_rect;
}
else if (t->MinFilter == GL_LINEAR) {
ASSERT(t->MinFilter == GL_NEAREST);
return &sample_nearest_rect;
}
+ case GL_TEXTURE_1D_ARRAY_EXT:
+ if (needLambda) {
+ return &sample_lambda_1d_array;
+ }
+ else if (t->MinFilter == GL_LINEAR) {
+ return &sample_linear_1d_array;
+ }
+ else {
+ ASSERT(t->MinFilter == GL_NEAREST);
+ return &sample_nearest_1d_array;
+ }
+ case GL_TEXTURE_2D_ARRAY_EXT:
+ if (needLambda) {
+ return &sample_lambda_2d_array;
+ }
+ else if (t->MinFilter == GL_LINEAR) {
+ return &sample_linear_2d_array;
+ }
+ else {
+ ASSERT(t->MinFilter == GL_NEAREST);
+ return &sample_nearest_2d_array;
+ }
default:
_mesa_problem(ctx,
"invalid target in _swrast_choose_texture_sample_func");
projects / mesa.git / blobdiff