*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
- * Copyright 2008 VMware, Inc. All rights reserved.
+ * Copyright 2008-2010 VMware, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
*
* Authors:
* Brian Paul
+ * Keith Whitwell
*/
-#include "sp_context.h"
-#include "sp_quad.h"
-#include "sp_surface.h"
-#include "sp_texture.h"
-#include "sp_tex_sample.h"
-#include "sp_tile_cache.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
+#include "pipe/p_shader_tokens.h"
#include "util/u_math.h"
#include "util/u_memory.h"
+#include "sp_quad.h" /* only for #define QUAD_* tokens */
+#include "sp_tex_sample.h"
+#include "sp_tex_tile_cache.h"
/*
- * Note, the FRAC macro has to work perfectly. Otherwise you'll sometimes
- * see 1-pixel bands of improperly weighted linear-filtered textures.
+ * Return fractional part of 'f'. Used for computing interpolation weights.
+ * Need to be careful with negative values.
+ * Note, if this function isn't perfect you'll sometimes see 1-pixel bands
+ * of improperly weighted linear-filtered textures.
* 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) - util_ifloor(f))
+static INLINE float
+frac(float f)
+{
+ return f - floorf(f);
+}
+
/**
/**
- * 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.
+ * Compute coord % size for repeat wrap modes.
+ * Note that if coord is a signed integer, coord % size doesn't give
+ * the right value for coord < 0 (in terms of texture repeat). Just
+ * casting to unsigned fixes that.
*/
-#define REMAINDER(A, B) ((unsigned) (A) % (unsigned) (B))
+static INLINE int
+repeat(int coord, unsigned size)
+{
+ return (int) ((unsigned) coord % size);
+}
/**
* \param icoord returns the integer texcoords
* \return integer texture index
*/
-static INLINE void
-nearest_texcoord_4(unsigned wrapMode, const float s[4], unsigned size,
- int icoord[4])
+static void
+wrap_nearest_repeat(const float s[4], unsigned size, int icoord[4])
{
uint ch;
- switch (wrapMode) {
- case PIPE_TEX_WRAP_REPEAT:
- /* s limited to [0,1) */
- /* i limited to [0,size-1] */
- for (ch = 0; ch < 4; ch++) {
- int i = util_ifloor(s[ch] * size);
- icoord[ch] = REMAINDER(i, size);
- }
- return;
- case PIPE_TEX_WRAP_CLAMP:
+ /* s limited to [0,1) */
+ /* i limited to [0,size-1] */
+ for (ch = 0; ch < 4; ch++) {
+ int i = util_ifloor(s[ch] * size);
+ icoord[ch] = repeat(i, size);
+ }
+}
+
+
+static void
+wrap_nearest_clamp(const float s[4], unsigned size, int icoord[4])
+{
+ uint ch;
+ /* s limited to [0,1] */
+ /* i limited to [0,size-1] */
+ for (ch = 0; ch < 4; ch++) {
+ if (s[ch] <= 0.0F)
+ icoord[ch] = 0;
+ else if (s[ch] >= 1.0F)
+ icoord[ch] = size - 1;
+ else
+ icoord[ch] = util_ifloor(s[ch] * size);
+ }
+}
+
+
+static void
+wrap_nearest_clamp_to_edge(const float s[4], unsigned size, int icoord[4])
+{
+ uint ch;
+ /* s limited to [min,max] */
+ /* i limited to [0, size-1] */
+ const float min = 1.0F / (2.0F * size);
+ const float max = 1.0F - min;
+ for (ch = 0; ch < 4; ch++) {
+ if (s[ch] < min)
+ icoord[ch] = 0;
+ else if (s[ch] > max)
+ icoord[ch] = size - 1;
+ else
+ icoord[ch] = util_ifloor(s[ch] * size);
+ }
+}
+
+
+static void
+wrap_nearest_clamp_to_border(const float s[4], unsigned size, int icoord[4])
+{
+ uint ch;
+ /* s limited to [min,max] */
+ /* i limited to [-1, size] */
+ const float min = -1.0F / (2.0F * size);
+ const float max = 1.0F - min;
+ for (ch = 0; ch < 4; ch++) {
+ if (s[ch] <= min)
+ icoord[ch] = -1;
+ else if (s[ch] >= max)
+ icoord[ch] = size;
+ else
+ icoord[ch] = util_ifloor(s[ch] * size);
+ }
+}
+
+
+static void
+wrap_nearest_mirror_repeat(const float s[4], unsigned size, int icoord[4])
+{
+ uint ch;
+ const float min = 1.0F / (2.0F * size);
+ const float max = 1.0F - min;
+ for (ch = 0; ch < 4; ch++) {
+ const int flr = util_ifloor(s[ch]);
+ float u = frac(s[ch]);
+ if (flr & 1)
+ u = 1.0F - u;
+ if (u < min)
+ icoord[ch] = 0;
+ else if (u > max)
+ icoord[ch] = size - 1;
+ else
+ icoord[ch] = util_ifloor(u * size);
+ }
+}
+
+
+static void
+wrap_nearest_mirror_clamp(const float s[4], unsigned size, int icoord[4])
+{
+ uint ch;
+ for (ch = 0; ch < 4; ch++) {
/* s limited to [0,1] */
/* i limited to [0,size-1] */
- for (ch = 0; ch < 4; ch++) {
- if (s[ch] <= 0.0F)
- icoord[ch] = 0;
- else if (s[ch] >= 1.0F)
- icoord[ch] = size - 1;
- else
- icoord[ch] = util_ifloor(s[ch] * size);
- }
- return;
- case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
- {
- /* s limited to [min,max] */
- /* i limited to [0, size-1] */
- const float min = 1.0F / (2.0F * size);
- const float max = 1.0F - min;
- for (ch = 0; ch < 4; ch++) {
- if (s[ch] < min)
- icoord[ch] = 0;
- else if (s[ch] > max)
- icoord[ch] = size - 1;
- else
- icoord[ch] = util_ifloor(s[ch] * size);
- }
- }
- return;
- case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
- {
- /* s limited to [min,max] */
- /* i limited to [-1, size] */
- const float min = -1.0F / (2.0F * size);
- const float max = 1.0F - min;
- for (ch = 0; ch < 4; ch++) {
- if (s[ch] <= min)
- icoord[ch] = -1;
- else if (s[ch] >= max)
- icoord[ch] = size;
- else
- icoord[ch] = util_ifloor(s[ch] * size);
- }
- }
- return;
- case PIPE_TEX_WRAP_MIRROR_REPEAT:
- {
- const float min = 1.0F / (2.0F * size);
- const float max = 1.0F - min;
- for (ch = 0; ch < 4; ch++) {
- const int flr = util_ifloor(s[ch]);
- float u;
- if (flr & 1)
- u = 1.0F - (s[ch] - (float) flr);
- else
- u = s[ch] - (float) flr;
- if (u < min)
- icoord[ch] = 0;
- else if (u > max)
- icoord[ch] = size - 1;
- else
- icoord[ch] = util_ifloor(u * size);
- }
- }
- return;
- case PIPE_TEX_WRAP_MIRROR_CLAMP:
- for (ch = 0; ch < 4; ch++) {
- /* s limited to [0,1] */
- /* i limited to [0,size-1] */
- const float u = fabsf(s[ch]);
- if (u <= 0.0F)
- icoord[ch] = 0;
- else if (u >= 1.0F)
- icoord[ch] = size - 1;
- else
- icoord[ch] = util_ifloor(u * size);
- }
- return;
- case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
- {
- /* s limited to [min,max] */
- /* i limited to [0, size-1] */
- const float min = 1.0F / (2.0F * size);
- const float max = 1.0F - min;
- for (ch = 0; ch < 4; ch++) {
- const float u = fabsf(s[ch]);
- if (u < min)
- icoord[ch] = 0;
- else if (u > max)
- icoord[ch] = size - 1;
- else
- icoord[ch] = util_ifloor(u * size);
- }
- }
- return;
- case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
- {
- /* s limited to [min,max] */
- /* i limited to [0, size-1] */
- const float min = -1.0F / (2.0F * size);
- const float max = 1.0F - min;
- for (ch = 0; ch < 4; ch++) {
- const float u = fabsf(s[ch]);
- if (u < min)
- icoord[ch] = -1;
- else if (u > max)
- icoord[ch] = size;
- else
- icoord[ch] = util_ifloor(u * size);
- }
- }
- return;
- default:
- assert(0);
+ const float u = fabsf(s[ch]);
+ if (u <= 0.0F)
+ icoord[ch] = 0;
+ else if (u >= 1.0F)
+ icoord[ch] = size - 1;
+ else
+ icoord[ch] = util_ifloor(u * size);
+ }
+}
+
+
+static void
+wrap_nearest_mirror_clamp_to_edge(const float s[4], unsigned size,
+ int icoord[4])
+{
+ uint ch;
+ /* s limited to [min,max] */
+ /* i limited to [0, size-1] */
+ const float min = 1.0F / (2.0F * size);
+ const float max = 1.0F - min;
+ for (ch = 0; ch < 4; ch++) {
+ const float u = fabsf(s[ch]);
+ if (u < min)
+ icoord[ch] = 0;
+ else if (u > max)
+ icoord[ch] = size - 1;
+ else
+ icoord[ch] = util_ifloor(u * size);
+ }
+}
+
+
+static void
+wrap_nearest_mirror_clamp_to_border(const float s[4], unsigned size,
+ int icoord[4])
+{
+ uint ch;
+ /* s limited to [min,max] */
+ /* i limited to [0, size-1] */
+ const float min = -1.0F / (2.0F * size);
+ const float max = 1.0F - min;
+ for (ch = 0; ch < 4; ch++) {
+ const float u = fabsf(s[ch]);
+ if (u < min)
+ icoord[ch] = -1;
+ else if (u > max)
+ icoord[ch] = size;
+ else
+ icoord[ch] = util_ifloor(u * size);
}
}
* \param w returns blend factor/weight between texture indexes
* \param icoord returns the computed integer texture coords
*/
-static INLINE void
-linear_texcoord_4(unsigned wrapMode, const float s[4], unsigned size,
+static void
+wrap_linear_repeat(const float s[4], unsigned size,
+ int icoord0[4], int icoord1[4], float w[4])
+{
+ uint ch;
+ for (ch = 0; ch < 4; ch++) {
+ float u = s[ch] * size - 0.5F;
+ icoord0[ch] = repeat(util_ifloor(u), size);
+ icoord1[ch] = repeat(icoord0[ch] + 1, size);
+ w[ch] = frac(u);
+ }
+}
+
+
+static void
+wrap_linear_clamp(const float s[4], unsigned size,
int icoord0[4], int icoord1[4], float w[4])
{
uint ch;
+ for (ch = 0; ch < 4; ch++) {
+ float u = CLAMP(s[ch], 0.0F, 1.0F);
+ u = u * size - 0.5f;
+ icoord0[ch] = util_ifloor(u);
+ icoord1[ch] = icoord0[ch] + 1;
+ w[ch] = frac(u);
+ }
+}
- switch (wrapMode) {
- case PIPE_TEX_WRAP_REPEAT:
- for (ch = 0; ch < 4; ch++) {
- float u = s[ch] * size - 0.5F;
- icoord0[ch] = REMAINDER(util_ifloor(u), size);
- icoord1[ch] = REMAINDER(icoord0[ch] + 1, size);
- w[ch] = FRAC(u);
- }
- break;;
- case PIPE_TEX_WRAP_CLAMP:
- for (ch = 0; ch < 4; ch++) {
- float u = CLAMP(s[ch], 0.0F, 1.0F);
- u = u * size - 0.5f;
- icoord0[ch] = util_ifloor(u);
- icoord1[ch] = icoord0[ch] + 1;
- w[ch] = FRAC(u);
- }
- break;;
- case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
- for (ch = 0; ch < 4; ch++) {
- float u = CLAMP(s[ch], 0.0F, 1.0F);
- u = u * size - 0.5f;
- icoord0[ch] = util_ifloor(u);
- icoord1[ch] = icoord0[ch] + 1;
- if (icoord0[ch] < 0)
- icoord0[ch] = 0;
- if (icoord1[ch] >= (int) size)
- icoord1[ch] = size - 1;
- w[ch] = FRAC(u);
- }
- break;;
- case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
- {
- const float min = -1.0F / (2.0F * size);
- const float max = 1.0F - min;
- for (ch = 0; ch < 4; ch++) {
- float u = CLAMP(s[ch], min, max);
- u = u * size - 0.5f;
- icoord0[ch] = util_ifloor(u);
- icoord1[ch] = icoord0[ch] + 1;
- w[ch] = FRAC(u);
- }
- }
- break;;
- case PIPE_TEX_WRAP_MIRROR_REPEAT:
- for (ch = 0; ch < 4; ch++) {
- const int flr = util_ifloor(s[ch]);
- float u;
- if (flr & 1)
- u = 1.0F - (s[ch] - (float) flr);
- else
- u = s[ch] - (float) flr;
- u = u * size - 0.5F;
- icoord0[ch] = util_ifloor(u);
- icoord1[ch] = icoord0[ch] + 1;
- if (icoord0[ch] < 0)
- icoord0[ch] = 0;
- if (icoord1[ch] >= (int) size)
- icoord1[ch] = size - 1;
- w[ch] = FRAC(u);
- }
- break;;
- case PIPE_TEX_WRAP_MIRROR_CLAMP:
- for (ch = 0; ch < 4; ch++) {
- float u = fabsf(s[ch]);
- if (u >= 1.0F)
- u = (float) size;
- else
- u *= size;
- u -= 0.5F;
- icoord0[ch] = util_ifloor(u);
- icoord1[ch] = icoord0[ch] + 1;
- w[ch] = FRAC(u);
- }
- break;;
- case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
- for (ch = 0; ch < 4; ch++) {
- float u = fabsf(s[ch]);
- if (u >= 1.0F)
- u = (float) size;
- else
- u *= size;
- u -= 0.5F;
- icoord0[ch] = util_ifloor(u);
- icoord1[ch] = icoord0[ch] + 1;
- if (icoord0[ch] < 0)
- icoord0[ch] = 0;
- if (icoord1[ch] >= (int) size)
- icoord1[ch] = size - 1;
- w[ch] = FRAC(u);
- }
- break;;
- case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
- {
- const float min = -1.0F / (2.0F * size);
- const float max = 1.0F - min;
- for (ch = 0; ch < 4; ch++) {
- float u = fabsf(s[ch]);
- if (u <= min)
- u = min * size;
- else if (u >= max)
- u = max * size;
- else
- u *= size;
- u -= 0.5F;
- icoord0[ch] = util_ifloor(u);
- icoord1[ch] = icoord0[ch] + 1;
- w[ch] = FRAC(u);
- }
- }
- break;;
- default:
- assert(0);
+
+static void
+wrap_linear_clamp_to_edge(const float s[4], unsigned size,
+ int icoord0[4], int icoord1[4], float w[4])
+{
+ uint ch;
+ for (ch = 0; ch < 4; ch++) {
+ float u = CLAMP(s[ch], 0.0F, 1.0F);
+ u = u * size - 0.5f;
+ icoord0[ch] = util_ifloor(u);
+ icoord1[ch] = icoord0[ch] + 1;
+ if (icoord0[ch] < 0)
+ icoord0[ch] = 0;
+ if (icoord1[ch] >= (int) size)
+ icoord1[ch] = size - 1;
+ w[ch] = frac(u);
+ }
+}
+
+
+static void
+wrap_linear_clamp_to_border(const float s[4], unsigned size,
+ int icoord0[4], int icoord1[4], float w[4])
+{
+ const float min = -1.0F / (2.0F * size);
+ const float max = 1.0F - min;
+ uint ch;
+ for (ch = 0; ch < 4; ch++) {
+ float u = CLAMP(s[ch], min, max);
+ u = u * size - 0.5f;
+ icoord0[ch] = util_ifloor(u);
+ icoord1[ch] = icoord0[ch] + 1;
+ w[ch] = frac(u);
+ }
+}
+
+
+static void
+wrap_linear_mirror_repeat(const float s[4], unsigned size,
+ int icoord0[4], int icoord1[4], float w[4])
+{
+ uint ch;
+ for (ch = 0; ch < 4; ch++) {
+ const int flr = util_ifloor(s[ch]);
+ float u = frac(s[ch]);
+ if (flr & 1)
+ u = 1.0F - u;
+ u = u * size - 0.5F;
+ icoord0[ch] = util_ifloor(u);
+ icoord1[ch] = icoord0[ch] + 1;
+ if (icoord0[ch] < 0)
+ icoord0[ch] = 0;
+ if (icoord1[ch] >= (int) size)
+ icoord1[ch] = size - 1;
+ w[ch] = frac(u);
+ }
+}
+
+
+static void
+wrap_linear_mirror_clamp(const float s[4], unsigned size,
+ int icoord0[4], int icoord1[4], float w[4])
+{
+ uint ch;
+ for (ch = 0; ch < 4; ch++) {
+ float u = fabsf(s[ch]);
+ if (u >= 1.0F)
+ u = (float) size;
+ else
+ u *= size;
+ u -= 0.5F;
+ icoord0[ch] = util_ifloor(u);
+ icoord1[ch] = icoord0[ch] + 1;
+ w[ch] = frac(u);
+ }
+}
+
+
+static void
+wrap_linear_mirror_clamp_to_edge(const float s[4], unsigned size,
+ int icoord0[4], int icoord1[4], float w[4])
+{
+ uint ch;
+ for (ch = 0; ch < 4; ch++) {
+ float u = fabsf(s[ch]);
+ if (u >= 1.0F)
+ u = (float) size;
+ else
+ u *= size;
+ u -= 0.5F;
+ icoord0[ch] = util_ifloor(u);
+ icoord1[ch] = icoord0[ch] + 1;
+ if (icoord0[ch] < 0)
+ icoord0[ch] = 0;
+ if (icoord1[ch] >= (int) size)
+ icoord1[ch] = size - 1;
+ w[ch] = frac(u);
+ }
+}
+
+
+static void
+wrap_linear_mirror_clamp_to_border(const float s[4], unsigned size,
+ int icoord0[4], int icoord1[4], float w[4])
+{
+ const float min = -1.0F / (2.0F * size);
+ const float max = 1.0F - min;
+ uint ch;
+ for (ch = 0; ch < 4; ch++) {
+ float u = fabsf(s[ch]);
+ if (u <= min)
+ u = min * size;
+ else if (u >= max)
+ u = max * size;
+ else
+ u *= size;
+ u -= 0.5F;
+ icoord0[ch] = util_ifloor(u);
+ icoord1[ch] = icoord0[ch] + 1;
+ w[ch] = frac(u);
}
}
/**
- * For RECT textures / unnormalized texcoords
- * Only a subset of wrap modes supported.
+ * PIPE_TEX_WRAP_CLAMP for nearest sampling, unnormalized coords.
*/
-static INLINE void
-nearest_texcoord_unnorm_4(unsigned wrapMode, const float s[4], unsigned size,
- int icoord[4])
+static void
+wrap_nearest_unorm_clamp(const float s[4], unsigned size, int icoord[4])
{
uint ch;
- switch (wrapMode) {
- case PIPE_TEX_WRAP_CLAMP:
- for (ch = 0; ch < 4; ch++) {
- int i = util_ifloor(s[ch]);
- icoord[ch]= CLAMP(i, 0, (int) size-1);
- }
- return;
- case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
- /* fall-through */
- case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
- for (ch = 0; ch < 4; ch++) {
- icoord[ch]= util_ifloor( CLAMP(s[ch], 0.5F, (float) size - 0.5F) );
- }
- return;
- default:
- assert(0);
+ for (ch = 0; ch < 4; ch++) {
+ int i = util_ifloor(s[ch]);
+ icoord[ch]= CLAMP(i, 0, (int) size-1);
}
}
/**
- * For RECT textures / unnormalized texcoords.
- * Only a subset of wrap modes supported.
+ * PIPE_TEX_WRAP_CLAMP_TO_BORDER for nearest sampling, unnormalized coords.
*/
-static INLINE void
-linear_texcoord_unnorm_4(unsigned wrapMode, const float s[4], unsigned size,
- int icoord0[4], int icoord1[4], float w[4])
+static void
+wrap_nearest_unorm_clamp_to_border(const float s[4], unsigned size,
+ int icoord[4])
{
uint ch;
- switch (wrapMode) {
- case PIPE_TEX_WRAP_CLAMP:
- for (ch = 0; ch < 4; ch++) {
- /* Not exactly what the spec says, but it matches NVIDIA output */
- float u = CLAMP(s[ch] - 0.5F, 0.0f, (float) size - 1.0f);
- icoord0[ch] = util_ifloor(u);
- icoord1[ch] = icoord0[ch] + 1;
- w[ch] = FRAC(u);
- }
- return;
- case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
- /* fall-through */
- case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
- for (ch = 0; ch < 4; ch++) {
- float u = CLAMP(s[ch], 0.5F, (float) size - 0.5F);
- u -= 0.5F;
- icoord0[ch] = util_ifloor(u);
- icoord1[ch] = icoord0[ch] + 1;
- if (icoord1[ch] > (int) size - 1)
- icoord1[ch] = size - 1;
- w[ch] = FRAC(u);
- }
- break;
- default:
- assert(0);
+ for (ch = 0; ch < 4; ch++) {
+ icoord[ch]= util_ifloor( CLAMP(s[ch], -0.5F, (float) size + 0.5F) );
}
}
-static unsigned
-choose_cube_face(float rx, float ry, float rz, float *newS, float *newT)
+/**
+ * PIPE_TEX_WRAP_CLAMP_TO_EDGE for nearest sampling, unnormalized coords.
+ */
+static void
+wrap_nearest_unorm_clamp_to_edge(const float s[4], unsigned size,
+ int icoord[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 float arx = fabsf(rx), ary = fabsf(ry), arz = fabsf(rz);
- unsigned face;
- float sc, tc, ma;
-
- if (arx >= ary && arx >= arz) {
- if (rx >= 0.0F) {
- face = PIPE_TEX_FACE_POS_X;
- sc = -rz;
- tc = -ry;
- ma = arx;
- }
- else {
- face = PIPE_TEX_FACE_NEG_X;
- sc = rz;
- tc = -ry;
- ma = arx;
- }
+ uint ch;
+ for (ch = 0; ch < 4; ch++) {
+ icoord[ch]= util_ifloor( CLAMP(s[ch], 0.5F, (float) size - 0.5F) );
}
- else if (ary >= arx && ary >= arz) {
- if (ry >= 0.0F) {
- face = PIPE_TEX_FACE_POS_Y;
- sc = rx;
- tc = rz;
- ma = ary;
- }
- else {
- face = PIPE_TEX_FACE_NEG_Y;
- sc = rx;
- tc = -rz;
- ma = ary;
- }
+}
+
+
+/**
+ * PIPE_TEX_WRAP_CLAMP for linear sampling, unnormalized coords.
+ */
+static void
+wrap_linear_unorm_clamp(const float s[4], unsigned size,
+ int icoord0[4], int icoord1[4], float w[4])
+{
+ uint ch;
+ for (ch = 0; ch < 4; ch++) {
+ /* Not exactly what the spec says, but it matches NVIDIA output */
+ float u = CLAMP(s[ch] - 0.5F, 0.0f, (float) size - 1.0f);
+ icoord0[ch] = util_ifloor(u);
+ icoord1[ch] = icoord0[ch] + 1;
+ w[ch] = frac(u);
}
- else {
- if (rz > 0.0F) {
- face = PIPE_TEX_FACE_POS_Z;
- sc = rx;
- tc = -ry;
- ma = arz;
- }
- else {
- face = PIPE_TEX_FACE_NEG_Z;
- sc = -rx;
- tc = -ry;
- ma = arz;
- }
+}
+
+
+/**
+ * PIPE_TEX_WRAP_CLAMP_TO_BORDER for linear sampling, unnormalized coords.
+ */
+static void
+wrap_linear_unorm_clamp_to_border(const float s[4], unsigned size,
+ int icoord0[4], int icoord1[4], float w[4])
+{
+ uint ch;
+ for (ch = 0; ch < 4; ch++) {
+ float u = CLAMP(s[ch], -0.5F, (float) size + 0.5F);
+ u -= 0.5F;
+ icoord0[ch] = util_ifloor(u);
+ icoord1[ch] = icoord0[ch] + 1;
+ if (icoord1[ch] > (int) size - 1)
+ icoord1[ch] = size - 1;
+ w[ch] = frac(u);
}
+}
- *newS = ( sc / ma + 1.0F ) * 0.5F;
- *newT = ( tc / ma + 1.0F ) * 0.5F;
- return face;
+/**
+ * PIPE_TEX_WRAP_CLAMP_TO_EDGE for linear sampling, unnormalized coords.
+ */
+static void
+wrap_linear_unorm_clamp_to_edge(const float s[4], unsigned size,
+ int icoord0[4], int icoord1[4], float w[4])
+{
+ uint ch;
+ for (ch = 0; ch < 4; ch++) {
+ float u = CLAMP(s[ch], +0.5F, (float) size - 0.5F);
+ u -= 0.5F;
+ icoord0[ch] = util_ifloor(u);
+ icoord1[ch] = icoord0[ch] + 1;
+ if (icoord1[ch] > (int) size - 1)
+ icoord1[ch] = size - 1;
+ w[ch] = frac(u);
+ }
}
+
/**
* Examine the quad's texture coordinates to compute the partial
* derivatives w.r.t X and Y, then compute lambda (level of detail).
- *
- * This is only done for fragment shaders, not vertex shaders.
*/
static float
-compute_lambda(const struct pipe_texture *tex,
- const struct pipe_sampler_state *sampler,
- const float s[QUAD_SIZE],
- const float t[QUAD_SIZE],
- const float p[QUAD_SIZE],
- float lodbias)
+compute_lambda_1d(const struct sp_sampler_varient *samp,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE])
{
- float rho, lambda;
+ const struct pipe_texture *texture = samp->texture;
+ float dsdx = fabsf(s[QUAD_BOTTOM_RIGHT] - s[QUAD_BOTTOM_LEFT]);
+ float dsdy = fabsf(s[QUAD_TOP_LEFT] - s[QUAD_BOTTOM_LEFT]);
+ float rho = MAX2(dsdx, dsdy) * texture->width0;
- assert(sampler->normalized_coords);
+ return util_fast_log2(rho);
+}
- assert(s);
- {
- float dsdx = s[QUAD_BOTTOM_RIGHT] - s[QUAD_BOTTOM_LEFT];
- float dsdy = s[QUAD_TOP_LEFT] - s[QUAD_BOTTOM_LEFT];
- dsdx = fabsf(dsdx);
- dsdy = fabsf(dsdy);
- rho = MAX2(dsdx, dsdy) * tex->width[0];
- }
- if (t) {
- float dtdx = t[QUAD_BOTTOM_RIGHT] - t[QUAD_BOTTOM_LEFT];
- float dtdy = t[QUAD_TOP_LEFT] - t[QUAD_BOTTOM_LEFT];
- float max;
- dtdx = fabsf(dtdx);
- dtdy = fabsf(dtdy);
- max = MAX2(dtdx, dtdy) * tex->height[0];
- rho = MAX2(rho, max);
- }
- if (p) {
- float dpdx = p[QUAD_BOTTOM_RIGHT] - p[QUAD_BOTTOM_LEFT];
- float dpdy = p[QUAD_TOP_LEFT] - p[QUAD_BOTTOM_LEFT];
- float max;
- dpdx = fabsf(dpdx);
- dpdy = fabsf(dpdy);
- max = MAX2(dpdx, dpdy) * tex->depth[0];
- rho = MAX2(rho, max);
- }
- lambda = util_fast_log2(rho);
- lambda += lodbias + sampler->lod_bias;
- lambda = CLAMP(lambda, sampler->min_lod, sampler->max_lod);
+static float
+compute_lambda_2d(const struct sp_sampler_varient *samp,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE])
+{
+ const struct pipe_texture *texture = samp->texture;
+ float dsdx = fabsf(s[QUAD_BOTTOM_RIGHT] - s[QUAD_BOTTOM_LEFT]);
+ float dsdy = fabsf(s[QUAD_TOP_LEFT] - s[QUAD_BOTTOM_LEFT]);
+ float dtdx = fabsf(t[QUAD_BOTTOM_RIGHT] - t[QUAD_BOTTOM_LEFT]);
+ float dtdy = fabsf(t[QUAD_TOP_LEFT] - t[QUAD_BOTTOM_LEFT]);
+ float maxx = MAX2(dsdx, dsdy) * texture->width0;
+ float maxy = MAX2(dtdx, dtdy) * texture->height0;
+ float rho = MAX2(maxx, maxy);
+
+ return util_fast_log2(rho);
+}
+
- return lambda;
+static float
+compute_lambda_3d(const struct sp_sampler_varient *samp,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE])
+{
+ const struct pipe_texture *texture = samp->texture;
+ float dsdx = fabsf(s[QUAD_BOTTOM_RIGHT] - s[QUAD_BOTTOM_LEFT]);
+ float dsdy = fabsf(s[QUAD_TOP_LEFT] - s[QUAD_BOTTOM_LEFT]);
+ float dtdx = fabsf(t[QUAD_BOTTOM_RIGHT] - t[QUAD_BOTTOM_LEFT]);
+ float dtdy = fabsf(t[QUAD_TOP_LEFT] - t[QUAD_BOTTOM_LEFT]);
+ float dpdx = fabsf(p[QUAD_BOTTOM_RIGHT] - p[QUAD_BOTTOM_LEFT]);
+ float dpdy = fabsf(p[QUAD_TOP_LEFT] - p[QUAD_BOTTOM_LEFT]);
+ float maxx = MAX2(dsdx, dsdy) * texture->width0;
+ float maxy = MAX2(dtdx, dtdy) * texture->height0;
+ float maxz = MAX2(dpdx, dpdy) * texture->depth0;
+ float rho;
+
+ rho = MAX2(maxx, maxy);
+ rho = MAX2(rho, maxz);
+
+ return util_fast_log2(rho);
}
/**
- * Do several things here:
- * 1. Compute lambda from the texcoords, if needed
- * 2. Determine if we're minifying or magnifying
- * 3. If minifying, choose mipmap levels
- * 4. Return image filter to use within mipmap images
- * \param level0 Returns first mipmap level to sample from
- * \param level1 Returns second mipmap level to sample from
- * \param levelBlend Returns blend factor between levels, in [0,1]
- * \param imgFilter Returns either the min or mag filter, depending on lambda
+ * Compute lambda for a vertex texture sampler.
+ * Since there aren't derivatives to use, just return 0.
*/
-static void
-choose_mipmap_levels(const struct pipe_texture *texture,
- const struct pipe_sampler_state *sampler,
- const float s[QUAD_SIZE],
- const float t[QUAD_SIZE],
- const float p[QUAD_SIZE],
- boolean computeLambda,
- float lodbias,
- unsigned *level0, unsigned *level1, float *levelBlend,
- unsigned *imgFilter)
-{
- if (sampler->min_mip_filter == PIPE_TEX_MIPFILTER_NONE) {
- /* no mipmap selection needed */
- *level0 = *level1 = CLAMP((int) sampler->min_lod,
- 0, (int) texture->last_level);
-
- if (sampler->min_img_filter != sampler->mag_img_filter) {
- /* non-mipmapped texture, but still need to determine if doing
- * minification or magnification.
- */
- float lambda = compute_lambda(texture, sampler, s, t, p, lodbias);
- if (lambda <= 0.0) {
- *imgFilter = sampler->mag_img_filter;
- }
- else {
- *imgFilter = sampler->min_img_filter;
- }
+static float
+compute_lambda_vert(const struct sp_sampler_varient *samp,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE])
+{
+ return 0.0f;
+}
+
+
+
+/**
+ * Get a texel from a texture, using the texture tile cache.
+ *
+ * \param addr the template tex address containing cube, z, face info.
+ * \param x the x coord of texel within 2D image
+ * \param y the y coord of texel within 2D image
+ * \param rgba the quad to put the texel/color into
+ *
+ * XXX maybe move this into sp_tex_tile_cache.c and merge with the
+ * sp_get_cached_tile_tex() function. Also, get 4 texels instead of 1...
+ */
+
+
+
+
+static INLINE const float *
+get_texel_2d_no_border(const struct sp_sampler_varient *samp,
+ union tex_tile_address addr, int x, int y)
+{
+ const struct softpipe_tex_cached_tile *tile;
+
+ addr.bits.x = x / TILE_SIZE;
+ addr.bits.y = y / TILE_SIZE;
+ y %= TILE_SIZE;
+ x %= TILE_SIZE;
+
+ tile = sp_get_cached_tile_tex(samp->cache, addr);
+
+ return &tile->data.color[y][x][0];
+}
+
+
+static INLINE const float *
+get_texel_2d(const struct sp_sampler_varient *samp,
+ union tex_tile_address addr, int x, int y)
+{
+ const struct pipe_texture *texture = samp->texture;
+ unsigned level = addr.bits.level;
+
+ if (x < 0 || x >= (int) u_minify(texture->width0, level) ||
+ y < 0 || y >= (int) u_minify(texture->height0, level)) {
+ return samp->sampler->border_color;
+ }
+ else {
+ return get_texel_2d_no_border( samp, addr, x, y );
+ }
+}
+
+
+/* Gather a quad of adjacent texels within a tile:
+ */
+static INLINE void
+get_texel_quad_2d_no_border_single_tile(const struct sp_sampler_varient *samp,
+ union tex_tile_address addr,
+ unsigned x, unsigned y,
+ const float *out[4])
+{
+ const struct softpipe_tex_cached_tile *tile;
+
+ addr.bits.x = x / TILE_SIZE;
+ addr.bits.y = y / TILE_SIZE;
+ y %= TILE_SIZE;
+ x %= TILE_SIZE;
+
+ tile = sp_get_cached_tile_tex(samp->cache, addr);
+
+ out[0] = &tile->data.color[y ][x ][0];
+ out[1] = &tile->data.color[y ][x+1][0];
+ out[2] = &tile->data.color[y+1][x ][0];
+ out[3] = &tile->data.color[y+1][x+1][0];
+}
+
+
+/* Gather a quad of potentially non-adjacent texels:
+ */
+static INLINE void
+get_texel_quad_2d_no_border(const struct sp_sampler_varient *samp,
+ union tex_tile_address addr,
+ int x0, int y0,
+ int x1, int y1,
+ const float *out[4])
+{
+ out[0] = get_texel_2d_no_border( samp, addr, x0, y0 );
+ out[1] = get_texel_2d_no_border( samp, addr, x1, y0 );
+ out[2] = get_texel_2d_no_border( samp, addr, x0, y1 );
+ out[3] = get_texel_2d_no_border( samp, addr, x1, y1 );
+}
+
+/* Can involve a lot of unnecessary checks for border color:
+ */
+static INLINE void
+get_texel_quad_2d(const struct sp_sampler_varient *samp,
+ union tex_tile_address addr,
+ int x0, int y0,
+ int x1, int y1,
+ const float *out[4])
+{
+ out[0] = get_texel_2d( samp, addr, x0, y0 );
+ out[1] = get_texel_2d( samp, addr, x1, y0 );
+ out[3] = get_texel_2d( samp, addr, x1, y1 );
+ out[2] = get_texel_2d( samp, addr, x0, y1 );
+}
+
+
+
+/* 3d varients:
+ */
+static INLINE const float *
+get_texel_3d_no_border(const struct sp_sampler_varient *samp,
+ union tex_tile_address addr, int x, int y, int z)
+{
+ const struct softpipe_tex_cached_tile *tile;
+
+ addr.bits.x = x / TILE_SIZE;
+ addr.bits.y = y / TILE_SIZE;
+ addr.bits.z = z;
+ y %= TILE_SIZE;
+ x %= TILE_SIZE;
+
+ tile = sp_get_cached_tile_tex(samp->cache, addr);
+
+ return &tile->data.color[y][x][0];
+}
+
+
+static INLINE const float *
+get_texel_3d(const struct sp_sampler_varient *samp,
+ union tex_tile_address addr, int x, int y, int z)
+{
+ const struct pipe_texture *texture = samp->texture;
+ unsigned level = addr.bits.level;
+
+ if (x < 0 || x >= (int) u_minify(texture->width0, level) ||
+ y < 0 || y >= (int) u_minify(texture->height0, level) ||
+ z < 0 || z >= (int) u_minify(texture->depth0, level)) {
+ return samp->sampler->border_color;
+ }
+ else {
+ return get_texel_3d_no_border( samp, addr, x, y, z );
+ }
+}
+
+
+/**
+ * Given the logbase2 of a mipmap's base level size and a mipmap level,
+ * return the size (in texels) of that mipmap level.
+ * For example, if level[0].width = 256 then base_pot will be 8.
+ * If level = 2, then we'll return 64 (the width at level=2).
+ * Return 1 if level > base_pot.
+ */
+static INLINE unsigned
+pot_level_size(unsigned base_pot, unsigned level)
+{
+ return (base_pot >= level) ? (1 << (base_pot - level)) : 1;
+}
+
+
+/* Some image-filter fastpaths:
+ */
+static INLINE void
+img_filter_2d_linear_repeat_POT(struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
+{
+ const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ unsigned j;
+ unsigned level = samp->level;
+ unsigned xpot = pot_level_size(samp->xpot, level);
+ unsigned ypot = pot_level_size(samp->ypot, level);
+ unsigned xmax = (xpot - 1) & (TILE_SIZE - 1); /* MIN2(TILE_SIZE, xpot) - 1; */
+ unsigned ymax = (ypot - 1) & (TILE_SIZE - 1); /* MIN2(TILE_SIZE, ypot) - 1; */
+ union tex_tile_address addr;
+
+ addr.value = 0;
+ addr.bits.level = samp->level;
+
+ for (j = 0; j < QUAD_SIZE; j++) {
+ int c;
+
+ float u = s[j] * xpot - 0.5F;
+ float v = t[j] * ypot - 0.5F;
+
+ int uflr = util_ifloor(u);
+ int vflr = util_ifloor(v);
+
+ float xw = u - (float)uflr;
+ float yw = v - (float)vflr;
+
+ int x0 = uflr & (xpot - 1);
+ int y0 = vflr & (ypot - 1);
+
+ const float *tx[4];
+
+ /* Can we fetch all four at once:
+ */
+ if (x0 < xmax && y0 < ymax) {
+ get_texel_quad_2d_no_border_single_tile(samp, addr, x0, y0, tx);
}
else {
- *imgFilter = sampler->mag_img_filter;
+ unsigned x1 = (x0 + 1) & (xpot - 1);
+ unsigned y1 = (y0 + 1) & (ypot - 1);
+ get_texel_quad_2d_no_border(samp, addr, x0, y0, x1, y1, tx);
+ }
+
+ /* interpolate R, G, B, A */
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = lerp_2d(xw, yw,
+ tx[0][c], tx[1][c],
+ tx[2][c], tx[3][c]);
}
}
- else {
- float lambda;
+}
- if (computeLambda)
- /* fragment shader */
- lambda = compute_lambda(texture, sampler, s, t, p, lodbias);
- else
- /* vertex shader */
- lambda = lodbias; /* not really a bias, but absolute LOD */
- if (lambda <= 0.0) { /* XXX threshold depends on the filter */
- /* magnifying */
- *imgFilter = sampler->mag_img_filter;
- *level0 = *level1 = 0;
+static INLINE void
+img_filter_2d_nearest_repeat_POT(struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
+{
+ const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ unsigned j;
+ unsigned level = samp->level;
+ unsigned xpot = pot_level_size(samp->xpot, level);
+ unsigned ypot = pot_level_size(samp->ypot, level);
+ union tex_tile_address addr;
+
+ addr.value = 0;
+ addr.bits.level = samp->level;
+
+ for (j = 0; j < QUAD_SIZE; j++) {
+ int c;
+
+ float u = s[j] * xpot;
+ float v = t[j] * ypot;
+
+ int uflr = util_ifloor(u);
+ int vflr = util_ifloor(v);
+
+ int x0 = uflr & (xpot - 1);
+ int y0 = vflr & (ypot - 1);
+
+ const float *out = get_texel_2d_no_border(samp, addr, x0, y0);
+
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = out[c];
}
- else {
- /* minifying */
- *imgFilter = sampler->min_img_filter;
-
- /* choose mipmap level(s) and compute the blend factor between them */
- if (sampler->min_mip_filter == PIPE_TEX_MIPFILTER_NEAREST) {
- /* Nearest mipmap level */
- const int lvl = (int) (lambda + 0.5);
- *level0 =
- *level1 = CLAMP(lvl, 0, (int) texture->last_level);
- }
- else {
- /* Linear interpolation between mipmap levels */
- const int lvl = (int) lambda;
- *level0 = CLAMP(lvl, 0, (int) texture->last_level);
- *level1 = CLAMP(lvl + 1, 0, (int) texture->last_level);
- *levelBlend = FRAC(lambda); /* blending weight between levels */
+ }
+}
+
+
+static INLINE void
+img_filter_2d_nearest_clamp_POT(struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
+{
+ const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ unsigned j;
+ unsigned level = samp->level;
+ unsigned xpot = pot_level_size(samp->xpot, level);
+ unsigned ypot = pot_level_size(samp->ypot, level);
+ union tex_tile_address addr;
+
+ addr.value = 0;
+ addr.bits.level = samp->level;
+
+ for (j = 0; j < QUAD_SIZE; j++) {
+ int c;
+
+ float u = s[j] * xpot;
+ float v = t[j] * ypot;
+
+ int x0, y0;
+ const float *out;
+
+ x0 = util_ifloor(u);
+ if (x0 < 0)
+ x0 = 0;
+ else if (x0 > xpot - 1)
+ x0 = xpot - 1;
+
+ y0 = util_ifloor(v);
+ if (y0 < 0)
+ y0 = 0;
+ else if (y0 > ypot - 1)
+ y0 = ypot - 1;
+
+ out = get_texel_2d_no_border(samp, addr, x0, y0);
+
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = out[c];
+ }
+ }
+}
+
+
+static void
+img_filter_1d_nearest(struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
+{
+ const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ const struct pipe_texture *texture = samp->texture;
+ unsigned level0, j;
+ int width;
+ int x[4];
+ union tex_tile_address addr;
+
+ level0 = samp->level;
+ width = u_minify(texture->width0, level0);
+
+ assert(width > 0);
+
+ addr.value = 0;
+ addr.bits.level = samp->level;
+
+ samp->nearest_texcoord_s(s, width, x);
+
+ for (j = 0; j < QUAD_SIZE; j++) {
+ const float *out = get_texel_2d(samp, addr, x[j], 0);
+ int c;
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = out[c];
+ }
+ }
+}
+
+
+static void
+img_filter_2d_nearest(struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
+{
+ const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ const struct pipe_texture *texture = samp->texture;
+ unsigned level0, j;
+ int width, height;
+ int x[4], y[4];
+ union tex_tile_address addr;
+
+
+ level0 = samp->level;
+ width = u_minify(texture->width0, level0);
+ height = u_minify(texture->height0, level0);
+
+ assert(width > 0);
+ assert(height > 0);
+
+ addr.value = 0;
+ addr.bits.level = samp->level;
+
+ samp->nearest_texcoord_s(s, width, x);
+ samp->nearest_texcoord_t(t, height, y);
+
+ for (j = 0; j < QUAD_SIZE; j++) {
+ const float *out = get_texel_2d(samp, addr, x[j], y[j]);
+ int c;
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = out[c];
+ }
+ }
+}
+
+
+static INLINE union tex_tile_address
+face(union tex_tile_address addr, unsigned face )
+{
+ addr.bits.face = face;
+ return addr;
+}
+
+
+static void
+img_filter_cube_nearest(struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
+{
+ const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ const struct pipe_texture *texture = samp->texture;
+ const unsigned *faces = samp->faces; /* zero when not cube-mapping */
+ unsigned level0, j;
+ int width, height;
+ int x[4], y[4];
+ union tex_tile_address addr;
+
+ level0 = samp->level;
+ width = u_minify(texture->width0, level0);
+ height = u_minify(texture->height0, level0);
+
+ assert(width > 0);
+ assert(height > 0);
+
+ addr.value = 0;
+ addr.bits.level = samp->level;
+
+ samp->nearest_texcoord_s(s, width, x);
+ samp->nearest_texcoord_t(t, height, y);
+
+ for (j = 0; j < QUAD_SIZE; j++) {
+ const float *out = get_texel_2d(samp, face(addr, faces[j]), x[j], y[j]);
+ int c;
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = out[c];
+ }
+ }
+}
+
+
+static void
+img_filter_3d_nearest(struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
+{
+ const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ const struct pipe_texture *texture = samp->texture;
+ unsigned level0, j;
+ int width, height, depth;
+ int x[4], y[4], z[4];
+ union tex_tile_address addr;
+
+ level0 = samp->level;
+ width = u_minify(texture->width0, level0);
+ height = u_minify(texture->height0, level0);
+ depth = u_minify(texture->depth0, level0);
+
+ assert(width > 0);
+ assert(height > 0);
+ assert(depth > 0);
+
+ samp->nearest_texcoord_s(s, width, x);
+ samp->nearest_texcoord_t(t, height, y);
+ samp->nearest_texcoord_p(p, depth, z);
+
+ addr.value = 0;
+ addr.bits.level = samp->level;
+
+ for (j = 0; j < QUAD_SIZE; j++) {
+ const float *out = get_texel_3d(samp, addr, x[j], y[j], z[j]);
+ int c;
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = out[c];
+ }
+ }
+}
+
+
+static void
+img_filter_1d_linear(struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
+{
+ const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ const struct pipe_texture *texture = samp->texture;
+ unsigned level0, j;
+ int width;
+ int x0[4], x1[4];
+ float xw[4]; /* weights */
+ union tex_tile_address addr;
+
+ level0 = samp->level;
+ width = u_minify(texture->width0, level0);
+
+ assert(width > 0);
+
+ addr.value = 0;
+ addr.bits.level = samp->level;
+
+ samp->linear_texcoord_s(s, width, x0, x1, xw);
+
+ for (j = 0; j < QUAD_SIZE; j++) {
+ const float *tx0 = get_texel_2d(samp, addr, x0[j], 0);
+ const float *tx1 = get_texel_2d(samp, addr, x1[j], 0);
+ int c;
+
+ /* interpolate R, G, B, A */
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = lerp(xw[j], tx0[c], tx1[c]);
+ }
+ }
+}
+
+
+static void
+img_filter_2d_linear(struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
+{
+ const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ const struct pipe_texture *texture = samp->texture;
+ unsigned level0, j;
+ int width, height;
+ int x0[4], y0[4], x1[4], y1[4];
+ float xw[4], yw[4]; /* weights */
+ union tex_tile_address addr;
+
+ level0 = samp->level;
+ width = u_minify(texture->width0, level0);
+ height = u_minify(texture->height0, level0);
+
+ assert(width > 0);
+ assert(height > 0);
+
+ addr.value = 0;
+ addr.bits.level = samp->level;
+
+ samp->linear_texcoord_s(s, width, x0, x1, xw);
+ samp->linear_texcoord_t(t, height, y0, y1, yw);
+
+ for (j = 0; j < QUAD_SIZE; j++) {
+ const float *tx0 = get_texel_2d(samp, addr, x0[j], y0[j]);
+ const float *tx1 = get_texel_2d(samp, addr, x1[j], y0[j]);
+ const float *tx2 = get_texel_2d(samp, addr, x0[j], y1[j]);
+ const float *tx3 = get_texel_2d(samp, addr, x1[j], y1[j]);
+ int c;
+
+ /* interpolate R, G, B, A */
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = lerp_2d(xw[j], yw[j],
+ tx0[c], tx1[c],
+ tx2[c], tx3[c]);
+ }
+ }
+}
+
+
+static void
+img_filter_cube_linear(struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
+{
+ const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ const struct pipe_texture *texture = samp->texture;
+ const unsigned *faces = samp->faces; /* zero when not cube-mapping */
+ unsigned level0, j;
+ int width, height;
+ int x0[4], y0[4], x1[4], y1[4];
+ float xw[4], yw[4]; /* weights */
+ union tex_tile_address addr;
+
+ level0 = samp->level;
+ width = u_minify(texture->width0, level0);
+ height = u_minify(texture->height0, level0);
+
+ assert(width > 0);
+ assert(height > 0);
+
+ addr.value = 0;
+ addr.bits.level = samp->level;
+
+ samp->linear_texcoord_s(s, width, x0, x1, xw);
+ samp->linear_texcoord_t(t, height, y0, y1, yw);
+
+ for (j = 0; j < QUAD_SIZE; j++) {
+ union tex_tile_address addrj = face(addr, faces[j]);
+ const float *tx0 = get_texel_2d(samp, addrj, x0[j], y0[j]);
+ const float *tx1 = get_texel_2d(samp, addrj, x1[j], y0[j]);
+ const float *tx2 = get_texel_2d(samp, addrj, x0[j], y1[j]);
+ const float *tx3 = get_texel_2d(samp, addrj, x1[j], y1[j]);
+ int c;
+
+ /* interpolate R, G, B, A */
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = lerp_2d(xw[j], yw[j],
+ tx0[c], tx1[c],
+ tx2[c], tx3[c]);
+ }
+ }
+}
+
+
+static void
+img_filter_3d_linear(struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
+{
+ const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ const struct pipe_texture *texture = samp->texture;
+ unsigned level0, j;
+ int width, height, depth;
+ int x0[4], x1[4], y0[4], y1[4], z0[4], z1[4];
+ float xw[4], yw[4], zw[4]; /* interpolation weights */
+ union tex_tile_address addr;
+
+ level0 = samp->level;
+ width = u_minify(texture->width0, level0);
+ height = u_minify(texture->height0, level0);
+ depth = u_minify(texture->depth0, level0);
+
+ addr.value = 0;
+ addr.bits.level = level0;
+
+ assert(width > 0);
+ assert(height > 0);
+ assert(depth > 0);
+
+ samp->linear_texcoord_s(s, width, x0, x1, xw);
+ samp->linear_texcoord_t(t, height, y0, y1, yw);
+ samp->linear_texcoord_p(p, depth, z0, z1, zw);
+
+ for (j = 0; j < QUAD_SIZE; j++) {
+ int c;
+
+ const float *tx00 = get_texel_3d(samp, addr, x0[j], y0[j], z0[j]);
+ const float *tx01 = get_texel_3d(samp, addr, x1[j], y0[j], z0[j]);
+ const float *tx02 = get_texel_3d(samp, addr, x0[j], y1[j], z0[j]);
+ const float *tx03 = get_texel_3d(samp, addr, x1[j], y1[j], z0[j]);
+
+ const float *tx10 = get_texel_3d(samp, addr, x0[j], y0[j], z1[j]);
+ const float *tx11 = get_texel_3d(samp, addr, x1[j], y0[j], z1[j]);
+ const float *tx12 = get_texel_3d(samp, addr, x0[j], y1[j], z1[j]);
+ const float *tx13 = get_texel_3d(samp, addr, x1[j], y1[j], z1[j]);
+
+ /* interpolate R, G, B, A */
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = lerp_3d(xw[j], yw[j], zw[j],
+ tx00[c], tx01[c],
+ tx02[c], tx03[c],
+ tx10[c], tx11[c],
+ tx12[c], tx13[c]);
+ }
+ }
+}
+
+
+/* Calculate level of detail for every fragment.
+ * Note that lambda has already been biased by global LOD bias.
+ */
+static INLINE void
+compute_lod(const struct pipe_sampler_state *sampler,
+ const float biased_lambda,
+ const float lodbias[QUAD_SIZE],
+ float lod[QUAD_SIZE])
+{
+ uint i;
+
+ for (i = 0; i < QUAD_SIZE; i++) {
+ lod[i] = biased_lambda + lodbias[i];
+ lod[i] = CLAMP(lod[i], sampler->min_lod, sampler->max_lod);
+ }
+}
+
+
+static void
+mip_filter_linear(struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
+{
+ struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ const struct pipe_texture *texture = samp->texture;
+ int level0;
+ float lambda;
+ float lod[QUAD_SIZE];
+
+ if (control == tgsi_sampler_lod_bias) {
+ lambda = samp->compute_lambda(samp, s, t, p) + samp->sampler->lod_bias;
+ compute_lod(samp->sampler, lambda, c0, lod);
+ } else {
+ assert(control == tgsi_sampler_lod_explicit);
+
+ memcpy(lod, c0, sizeof(lod));
+ }
+
+ /* XXX: Take into account all lod values.
+ */
+ lambda = lod[0];
+ level0 = (int)lambda;
+
+ if (lambda < 0.0) {
+ samp->level = 0;
+ samp->mag_img_filter(tgsi_sampler, s, t, p, NULL, tgsi_sampler_lod_bias, rgba);
+ }
+ else if (level0 >= texture->last_level) {
+ samp->level = texture->last_level;
+ samp->min_img_filter(tgsi_sampler, s, t, p, NULL, tgsi_sampler_lod_bias, rgba);
+ }
+ else {
+ float levelBlend = lambda - level0;
+ float rgba0[4][4];
+ float rgba1[4][4];
+ int c,j;
+
+ samp->level = level0;
+ samp->min_img_filter(tgsi_sampler, s, t, p, NULL, tgsi_sampler_lod_bias, rgba0);
+
+ samp->level = level0+1;
+ samp->min_img_filter(tgsi_sampler, s, t, p, NULL, tgsi_sampler_lod_bias, rgba1);
+
+ for (j = 0; j < QUAD_SIZE; j++) {
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = lerp(levelBlend, rgba0[c][j], rgba1[c][j]);
}
}
}
-}
+}
+
+
+/**
+ * Compute nearest mipmap level from texcoords.
+ * Then sample the texture level for four elements of a quad.
+ * \param c0 the LOD bias factors, or absolute LODs (depending on control)
+ */
+static void
+mip_filter_nearest(struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
+{
+ struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ const struct pipe_texture *texture = samp->texture;
+ float lambda;
+ float lod[QUAD_SIZE];
+
+ if (control == tgsi_sampler_lod_bias) {
+ lambda = samp->compute_lambda(samp, s, t, p) + samp->sampler->lod_bias;
+ compute_lod(samp->sampler, lambda, c0, lod);
+ } else {
+ assert(control == tgsi_sampler_lod_explicit);
+
+ memcpy(lod, c0, sizeof(lod));
+ }
+
+ /* XXX: Take into account all lod values.
+ */
+ lambda = lod[0];
+
+ if (lambda < 0.0) {
+ samp->level = 0;
+ samp->mag_img_filter(tgsi_sampler, s, t, p, NULL, tgsi_sampler_lod_bias, rgba);
+ }
+ else {
+ samp->level = (int)(lambda + 0.5) ;
+ samp->level = MIN2(samp->level, (int)texture->last_level);
+ samp->min_img_filter(tgsi_sampler, s, t, p, NULL, tgsi_sampler_lod_bias, rgba);
+ }
+
+#if 0
+ printf("RGBA %g %g %g %g, %g %g %g %g, %g %g %g %g, %g %g %g %g\n",
+ rgba[0][0], rgba[1][0], rgba[2][0], rgba[3][0],
+ rgba[0][1], rgba[1][1], rgba[2][1], rgba[3][1],
+ rgba[0][2], rgba[1][2], rgba[2][2], rgba[3][2],
+ rgba[0][3], rgba[1][3], rgba[2][3], rgba[3][3]);
+#endif
+}
+
+
+static void
+mip_filter_none(struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
+{
+ struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ float lambda;
+ float lod[QUAD_SIZE];
+
+ if (control == tgsi_sampler_lod_bias) {
+ lambda = samp->compute_lambda(samp, s, t, p) + samp->sampler->lod_bias;
+ compute_lod(samp->sampler, lambda, c0, lod);
+ } else {
+ assert(control == tgsi_sampler_lod_explicit);
+
+ memcpy(lod, c0, sizeof(lod));
+ }
+ /* XXX: Take into account all lod values.
+ */
+ lambda = lod[0];
-/**
- * Get a texel from a texture, using the texture tile cache.
- *
- * \param face the cube face in 0..5
- * \param level the mipmap level
- * \param x the x coord of texel within 2D image
- * \param y the y coord of texel within 2D image
- * \param z which slice of a 3D texture
- * \param rgba the quad to put the texel/color into
- * \param j which element of the rgba quad to write to
- *
- * XXX maybe move this into sp_tile_cache.c and merge with the
- * sp_get_cached_tile_tex() function. Also, get 4 texels instead of 1...
- */
-static void
-get_texel(const struct tgsi_sampler *tgsi_sampler,
- unsigned face, unsigned level, int x, int y, int z,
- float rgba[NUM_CHANNELS][QUAD_SIZE], unsigned j)
-{
- const struct sp_shader_sampler *samp = sp_shader_sampler(tgsi_sampler);
- struct softpipe_context *sp = samp->sp;
- const uint unit = samp->unit;
- const struct pipe_texture *texture = sp->texture[unit];
- const struct pipe_sampler_state *sampler = sp->sampler[unit];
-
- if (x < 0 || x >= (int) texture->width[level] ||
- y < 0 || y >= (int) texture->height[level] ||
- z < 0 || z >= (int) texture->depth[level]) {
- rgba[0][j] = sampler->border_color[0];
- rgba[1][j] = sampler->border_color[1];
- rgba[2][j] = sampler->border_color[2];
- rgba[3][j] = sampler->border_color[3];
+ if (lambda < 0.0) {
+ samp->mag_img_filter(tgsi_sampler, s, t, p, NULL, tgsi_sampler_lod_bias, rgba);
}
else {
- const int tx = x % TILE_SIZE;
- const int ty = y % TILE_SIZE;
- const struct softpipe_cached_tile *tile
- = sp_get_cached_tile_tex(sp, samp->cache,
- x, y, z, face, level);
- rgba[0][j] = tile->data.color[ty][tx][0];
- rgba[1][j] = tile->data.color[ty][tx][1];
- rgba[2][j] = tile->data.color[ty][tx][2];
- rgba[3][j] = tile->data.color[ty][tx][3];
- if (0)
- {
- debug_printf("Get texel %f %f %f %f from %s\n",
- rgba[0][j], rgba[1][j], rgba[2][j], rgba[3][j],
- pf_name(texture->format));
- }
+ samp->min_img_filter(tgsi_sampler, s, t, p, NULL, tgsi_sampler_lod_bias, rgba);
}
}
+
/**
- * Compare texcoord 'p' (aka R) against texture value 'rgba[0]'
- * When we sampled the depth texture, the depth value was put into all
- * RGBA channels. We look at the red channel here.
- * \param rgba quad of (depth) texel values
- * \param p texture 'P' components for four pixels in quad
- * \param j which pixel in the quad to test [0..3]
+ * Specialized version of mip_filter_linear with hard-wired calls to
+ * 2d lambda calculation and 2d_linear_repeat_POT img filters.
*/
-static INLINE void
-shadow_compare(const struct pipe_sampler_state *sampler,
- float rgba[NUM_CHANNELS][QUAD_SIZE],
- const float p[QUAD_SIZE],
- uint j)
+static void
+mip_filter_linear_2d_linear_repeat_POT(
+ struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
{
- int k;
- switch (sampler->compare_func) {
- case PIPE_FUNC_LESS:
- k = p[j] < rgba[0][j];
- break;
- case PIPE_FUNC_LEQUAL:
- k = p[j] <= rgba[0][j];
- break;
- case PIPE_FUNC_GREATER:
- k = p[j] > rgba[0][j];
- break;
- case PIPE_FUNC_GEQUAL:
- k = p[j] >= rgba[0][j];
- break;
- case PIPE_FUNC_EQUAL:
- k = p[j] == rgba[0][j];
- break;
- case PIPE_FUNC_NOTEQUAL:
- k = p[j] != rgba[0][j];
- break;
- case PIPE_FUNC_ALWAYS:
- k = 1;
- break;
- case PIPE_FUNC_NEVER:
- k = 0;
- break;
- default:
- k = 0;
- assert(0);
- break;
+ struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ const struct pipe_texture *texture = samp->texture;
+ int level0;
+ float lambda;
+ float lod[QUAD_SIZE];
+
+ if (control == tgsi_sampler_lod_bias) {
+ lambda = samp->compute_lambda(samp, s, t, p) + samp->sampler->lod_bias;
+ compute_lod(samp->sampler, lambda, c0, lod);
+ } else {
+ assert(control == tgsi_sampler_lod_explicit);
+
+ memcpy(lod, c0, sizeof(lod));
}
- /* XXX returning result for default GL_DEPTH_TEXTURE_MODE = GL_LUMINANCE */
- rgba[0][j] = rgba[1][j] = rgba[2][j] = (float) k;
- rgba[3][j] = 1.0F;
+ /* XXX: Take into account all lod values.
+ */
+ lambda = lod[0];
+ level0 = (int)lambda;
+
+ /* Catches both negative and large values of level0:
+ */
+ if ((unsigned)level0 >= texture->last_level) {
+ if (level0 < 0)
+ samp->level = 0;
+ else
+ samp->level = texture->last_level;
+
+ img_filter_2d_linear_repeat_POT(tgsi_sampler, s, t, p, NULL, tgsi_sampler_lod_bias, rgba);
+ }
+ else {
+ float levelBlend = lambda - level0;
+ float rgba0[4][4];
+ float rgba1[4][4];
+ int c,j;
+
+ samp->level = level0;
+ img_filter_2d_linear_repeat_POT(tgsi_sampler, s, t, p, NULL, tgsi_sampler_lod_bias, rgba0);
+
+ samp->level = level0+1;
+ img_filter_2d_linear_repeat_POT(tgsi_sampler, s, t, p, NULL, tgsi_sampler_lod_bias, rgba1);
+
+ for (j = 0; j < QUAD_SIZE; j++) {
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = lerp(levelBlend, rgba0[c][j], rgba1[c][j]);
+ }
+ }
+ }
}
+
/**
- * As above, but do four z/texture comparisons.
+ * Do shadow/depth comparisons.
*/
-static INLINE void
-shadow_compare4(const struct pipe_sampler_state *sampler,
- float rgba[NUM_CHANNELS][QUAD_SIZE],
- const float p[QUAD_SIZE])
+static void
+sample_compare(struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
{
+ struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ const struct pipe_sampler_state *sampler = samp->sampler;
int j, k0, k1, k2, k3;
float val;
+ samp->mip_filter(tgsi_sampler, s, t, p, c0, control, rgba);
+
+ /**
+ * Compare texcoord 'p' (aka R) against texture value 'rgba[0]'
+ * When we sampled the depth texture, the depth value was put into all
+ * RGBA channels. We look at the red channel here.
+ */
+
/* compare four texcoords vs. four texture samples */
switch (sampler->compare_func) {
case PIPE_FUNC_LESS:
/**
- * Common code for sampling 1D/2D/cube textures.
- * Could probably extend for 3D...
+ * Use 3D texcoords to choose a cube face, then sample the 2D cube faces.
+ * Put face info into the sampler faces[] array.
*/
static void
-sp_get_samples_2d_common(const struct tgsi_sampler *tgsi_sampler,
- const float s[QUAD_SIZE],
- const float t[QUAD_SIZE],
- const float p[QUAD_SIZE],
- boolean computeLambda,
- float lodbias,
- float rgba[NUM_CHANNELS][QUAD_SIZE],
- const unsigned faces[4])
-{
- const struct sp_shader_sampler *samp = sp_shader_sampler(tgsi_sampler);
- const struct softpipe_context *sp = samp->sp;
- const uint unit = samp->unit;
- const struct pipe_texture *texture = sp->texture[unit];
- const struct pipe_sampler_state *sampler = sp->sampler[unit];
- unsigned level0, level1, j, imgFilter;
- int width, height;
- float levelBlend;
-
- choose_mipmap_levels(texture, sampler, s, t, p, computeLambda, lodbias,
- &level0, &level1, &levelBlend, &imgFilter);
-
- assert(sampler->normalized_coords);
-
- width = texture->width[level0];
- height = texture->height[level0];
-
- assert(width > 0);
+sample_cube(struct tgsi_sampler *tgsi_sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ const float c0[QUAD_SIZE],
+ enum tgsi_sampler_control control,
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
+{
+ struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
+ unsigned j;
+ float ssss[4], tttt[4];
- switch (imgFilter) {
- case PIPE_TEX_FILTER_NEAREST:
- {
- int x[4], y[4];
- nearest_texcoord_4(sampler->wrap_s, s, width, x);
- nearest_texcoord_4(sampler->wrap_t, t, height, y);
+ /*
+ 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
+ */
+ /* Choose the cube face and compute new s/t coords for the 2D face.
+ *
+ * Use the same cube face for all four pixels in the quad.
+ *
+ * This isn't ideal, but if we want to use a different cube face
+ * per pixel in the quad, we'd have to also compute the per-face
+ * LOD here too. That's because the four post-face-selection
+ * texcoords are no longer related to each other (they're
+ * per-face!) so we can't use subtraction to compute the partial
+ * deriviates to compute the LOD. Doing so (near cube edges
+ * anyway) gives us pretty much random values.
+ */
+ {
+ /* use the average of the four pixel's texcoords to choose the face */
+ const float rx = 0.25 * (s[0] + s[1] + s[2] + s[3]);
+ const float ry = 0.25 * (t[0] + t[1] + t[2] + t[3]);
+ const float rz = 0.25 * (p[0] + p[1] + p[2] + p[3]);
+ const float arx = fabsf(rx), ary = fabsf(ry), arz = fabsf(rz);
+
+ if (arx >= ary && arx >= arz) {
+ float sign = (rx >= 0.0F) ? 1.0F : -1.0F;
+ uint face = (rx >= 0.0F) ? PIPE_TEX_FACE_POS_X : PIPE_TEX_FACE_NEG_X;
for (j = 0; j < QUAD_SIZE; j++) {
- get_texel(tgsi_sampler, faces[j], level0, x[j], y[j], 0, rgba, j);
- if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE) {
- shadow_compare(sampler, rgba, p, j);
- }
-
- if (level0 != level1) {
- /* get texels from second mipmap level and blend */
- float rgba2[4][4];
- unsigned c;
- x[j] /= 2;
- y[j] /= 2;
- get_texel(tgsi_sampler, faces[j], level1, x[j], y[j], 0,
- rgba2, j);
- if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE){
- shadow_compare(sampler, rgba2, p, j);
- }
-
- for (c = 0; c < NUM_CHANNELS; c++) {
- rgba[c][j] = lerp(levelBlend, rgba[c][j], rgba2[c][j]);
- }
- }
+ const float ima = -0.5F / fabsf(s[j]);
+ ssss[j] = sign * p[j] * ima + 0.5F;
+ tttt[j] = t[j] * ima + 0.5F;
+ samp->faces[j] = face;
}
}
- break;
- case PIPE_TEX_FILTER_LINEAR:
- case PIPE_TEX_FILTER_ANISO:
- {
- int x0[4], y0[4], x1[4], y1[4];
- float xw[4], yw[4]; /* weights */
+ else if (ary >= arx && ary >= arz) {
+ float sign = (ry >= 0.0F) ? 1.0F : -1.0F;
+ uint face = (ry >= 0.0F) ? PIPE_TEX_FACE_POS_Y : PIPE_TEX_FACE_NEG_Y;
+ for (j = 0; j < QUAD_SIZE; j++) {
+ const float ima = -0.5F / fabsf(t[j]);
+ ssss[j] = -s[j] * ima + 0.5F;
+ tttt[j] = sign * -p[j] * ima + 0.5F;
+ samp->faces[j] = face;
+ }
+ }
+ else {
+ float sign = (rz >= 0.0F) ? 1.0F : -1.0F;
+ uint face = (rz >= 0.0F) ? PIPE_TEX_FACE_POS_Z : PIPE_TEX_FACE_NEG_Z;
+ for (j = 0; j < QUAD_SIZE; j++) {
+ const float ima = -0.5 / fabsf(p[j]);
+ ssss[j] = sign * -s[j] * ima + 0.5F;
+ tttt[j] = t[j] * ima + 0.5F;
+ samp->faces[j] = face;
+ }
+ }
+ }
- linear_texcoord_4(sampler->wrap_s, s, width, x0, x1, xw);
- linear_texcoord_4(sampler->wrap_t, t, height, y0, y1, yw);
+ /* In our little pipeline, the compare stage is next. If compare
+ * is not active, this will point somewhere deeper into the
+ * pipeline, eg. to mip_filter or even img_filter.
+ */
+ samp->compare(tgsi_sampler, ssss, tttt, NULL, c0, control, rgba);
+}
- for (j = 0; j < QUAD_SIZE; j++) {
- float tx[4][4]; /* texels */
- int c;
- get_texel(tgsi_sampler, faces[j], level0, x0[j], y0[j], 0, tx, 0);
- get_texel(tgsi_sampler, faces[j], level0, x1[j], y0[j], 0, tx, 1);
- get_texel(tgsi_sampler, faces[j], level0, x0[j], y1[j], 0, tx, 2);
- get_texel(tgsi_sampler, faces[j], level0, x1[j], y1[j], 0, tx, 3);
- if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE) {
- shadow_compare4(sampler, tx, p);
- }
- /* interpolate R, G, B, A */
- for (c = 0; c < 4; c++) {
- rgba[c][j] = lerp_2d(xw[j], yw[j],
- tx[c][0], tx[c][1],
- tx[c][2], tx[c][3]);
- }
- if (level0 != level1) {
- /* get texels from second mipmap level and blend */
- float rgba2[4][4];
- x0[j] /= 2;
- y0[j] /= 2;
- x1[j] /= 2;
- y1[j] /= 2;
- get_texel(tgsi_sampler, faces[j], level1, x0[j], y0[j], 0, tx, 0);
- get_texel(tgsi_sampler, faces[j], level1, x1[j], y0[j], 0, tx, 1);
- get_texel(tgsi_sampler, faces[j], level1, x0[j], y1[j], 0, tx, 2);
- get_texel(tgsi_sampler, faces[j], level1, x1[j], y1[j], 0, tx, 3);
- if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE){
- shadow_compare4(sampler, tx, p);
- }
-
- /* interpolate R, G, B, A */
- for (c = 0; c < 4; c++) {
- rgba2[c][j] = lerp_2d(xw[j], yw[j],
- tx[c][0], tx[c][1], tx[c][2], tx[c][3]);
- }
-
- for (c = 0; c < NUM_CHANNELS; c++) {
- rgba[c][j] = lerp(levelBlend, rgba[c][j], rgba2[c][j]);
- }
- }
- }
- }
- break;
+static wrap_nearest_func
+get_nearest_unorm_wrap(unsigned mode)
+{
+ switch (mode) {
+ case PIPE_TEX_WRAP_CLAMP:
+ return wrap_nearest_unorm_clamp;
+ case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
+ return wrap_nearest_unorm_clamp_to_edge;
+ case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
+ return wrap_nearest_unorm_clamp_to_border;
default:
assert(0);
+ return wrap_nearest_unorm_clamp;
}
}
-static INLINE void
-sp_get_samples_1d(const struct tgsi_sampler *sampler,
- const float s[QUAD_SIZE],
- const float t[QUAD_SIZE],
- const float p[QUAD_SIZE],
- boolean computeLambda,
- float lodbias,
- float rgba[NUM_CHANNELS][QUAD_SIZE])
+static wrap_nearest_func
+get_nearest_wrap(unsigned mode)
{
- static const unsigned faces[4] = {0, 0, 0, 0};
- static const float tzero[4] = {0, 0, 0, 0};
- sp_get_samples_2d_common(sampler, s, tzero, NULL,
- computeLambda, lodbias, rgba, faces);
+ switch (mode) {
+ case PIPE_TEX_WRAP_REPEAT:
+ return wrap_nearest_repeat;
+ case PIPE_TEX_WRAP_CLAMP:
+ return wrap_nearest_clamp;
+ case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
+ return wrap_nearest_clamp_to_edge;
+ case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
+ return wrap_nearest_clamp_to_border;
+ case PIPE_TEX_WRAP_MIRROR_REPEAT:
+ return wrap_nearest_mirror_repeat;
+ case PIPE_TEX_WRAP_MIRROR_CLAMP:
+ return wrap_nearest_mirror_clamp;
+ case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
+ return wrap_nearest_mirror_clamp_to_edge;
+ case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
+ return wrap_nearest_mirror_clamp_to_border;
+ default:
+ assert(0);
+ return wrap_nearest_repeat;
+ }
}
-static INLINE void
-sp_get_samples_2d(const struct tgsi_sampler *sampler,
- const float s[QUAD_SIZE],
- const float t[QUAD_SIZE],
- const float p[QUAD_SIZE],
- boolean computeLambda,
- float lodbias,
- float rgba[NUM_CHANNELS][QUAD_SIZE])
+static wrap_linear_func
+get_linear_unorm_wrap(unsigned mode)
{
- static const unsigned faces[4] = {0, 0, 0, 0};
- sp_get_samples_2d_common(sampler, s, t, p,
- computeLambda, lodbias, rgba, faces);
+ switch (mode) {
+ case PIPE_TEX_WRAP_CLAMP:
+ return wrap_linear_unorm_clamp;
+ case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
+ return wrap_linear_unorm_clamp_to_edge;
+ case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
+ return wrap_linear_unorm_clamp_to_border;
+ default:
+ assert(0);
+ return wrap_linear_unorm_clamp;
+ }
}
-static INLINE void
-sp_get_samples_3d(const struct tgsi_sampler *tgsi_sampler,
- const float s[QUAD_SIZE],
- const float t[QUAD_SIZE],
- const float p[QUAD_SIZE],
- boolean computeLambda,
- float lodbias,
- float rgba[NUM_CHANNELS][QUAD_SIZE])
+static wrap_linear_func
+get_linear_wrap(unsigned mode)
{
- const struct sp_shader_sampler *samp = sp_shader_sampler(tgsi_sampler);
- const struct softpipe_context *sp = samp->sp;
- const uint unit = samp->unit;
- const struct pipe_texture *texture = sp->texture[unit];
- const struct pipe_sampler_state *sampler = sp->sampler[unit];
- /* get/map pipe_surfaces corresponding to 3D tex slices */
- unsigned level0, level1, j, imgFilter;
- int width, height, depth;
- float levelBlend;
- const uint face = 0;
-
- choose_mipmap_levels(texture, sampler, s, t, p, computeLambda, lodbias,
- &level0, &level1, &levelBlend, &imgFilter);
-
- assert(sampler->normalized_coords);
-
- width = texture->width[level0];
- height = texture->height[level0];
- depth = texture->depth[level0];
-
- assert(width > 0);
- assert(height > 0);
- assert(depth > 0);
-
- switch (imgFilter) {
- case PIPE_TEX_FILTER_NEAREST:
- {
- int x[4], y[4], z[4];
- nearest_texcoord_4(sampler->wrap_s, s, width, x);
- nearest_texcoord_4(sampler->wrap_t, t, height, y);
- nearest_texcoord_4(sampler->wrap_r, p, depth, z);
- for (j = 0; j < QUAD_SIZE; j++) {
- get_texel(tgsi_sampler, face, level0, x[j], y[j], z[j], rgba, j);
- if (level0 != level1) {
- /* get texels from second mipmap level and blend */
- float rgba2[4][4];
- unsigned c;
- x[j] /= 2;
- y[j] /= 2;
- z[j] /= 2;
- get_texel(tgsi_sampler, face, level1, x[j], y[j], z[j], rgba2, j);
- for (c = 0; c < NUM_CHANNELS; c++) {
- rgba[c][j] = lerp(levelBlend, rgba2[c][j], rgba[c][j]);
- }
- }
- }
- }
- break;
- case PIPE_TEX_FILTER_LINEAR:
- case PIPE_TEX_FILTER_ANISO:
- {
- int x0[4], x1[4], y0[4], y1[4], z0[4], z1[4];
- float xw[4], yw[4], zw[4]; /* interpolation weights */
- linear_texcoord_4(sampler->wrap_s, s, width, x0, x1, xw);
- linear_texcoord_4(sampler->wrap_t, t, height, y0, y1, yw);
- linear_texcoord_4(sampler->wrap_r, p, depth, z0, z1, zw);
-
- for (j = 0; j < QUAD_SIZE; j++) {
- int c;
- float tx0[4][4], tx1[4][4];
- get_texel(tgsi_sampler, face, level0, x0[j], y0[j], z0[j], tx0, 0);
- get_texel(tgsi_sampler, face, level0, x1[j], y0[j], z0[j], tx0, 1);
- get_texel(tgsi_sampler, face, level0, x0[j], y1[j], z0[j], tx0, 2);
- get_texel(tgsi_sampler, face, level0, x1[j], y1[j], z0[j], tx0, 3);
- get_texel(tgsi_sampler, face, level0, x0[j], y0[j], z1[j], tx1, 0);
- get_texel(tgsi_sampler, face, level0, x1[j], y0[j], z1[j], tx1, 1);
- get_texel(tgsi_sampler, face, level0, x0[j], y1[j], z1[j], tx1, 2);
- get_texel(tgsi_sampler, face, level0, x1[j], y1[j], z1[j], tx1, 3);
-
- /* interpolate R, G, B, A */
- for (c = 0; c < 4; c++) {
- rgba[c][j] = lerp_3d(xw[j], yw[j], zw[j],
- tx0[c][0], tx0[c][1],
- tx0[c][2], tx0[c][3],
- tx1[c][0], tx1[c][1],
- tx1[c][2], tx1[c][3]);
- }
-
- if (level0 != level1) {
- /* get texels from second mipmap level and blend */
- float rgba2[4][4];
- x0[j] /= 2;
- y0[j] /= 2;
- z0[j] /= 2;
- x1[j] /= 2;
- y1[j] /= 2;
- z1[j] /= 2;
- get_texel(tgsi_sampler, face, level1, x0[j], y0[j], z0[j], tx0, 0);
- get_texel(tgsi_sampler, face, level1, x1[j], y0[j], z0[j], tx0, 1);
- get_texel(tgsi_sampler, face, level1, x0[j], y1[j], z0[j], tx0, 2);
- get_texel(tgsi_sampler, face, level1, x1[j], y1[j], z0[j], tx0, 3);
- get_texel(tgsi_sampler, face, level1, x0[j], y0[j], z1[j], tx1, 0);
- get_texel(tgsi_sampler, face, level1, x1[j], y0[j], z1[j], tx1, 1);
- get_texel(tgsi_sampler, face, level1, x0[j], y1[j], z1[j], tx1, 2);
- get_texel(tgsi_sampler, face, level1, x1[j], y1[j], z1[j], tx1, 3);
-
- /* interpolate R, G, B, A */
- for (c = 0; c < 4; c++) {
- rgba2[c][j] = lerp_3d(xw[j], yw[j], zw[j],
- tx0[c][0], tx0[c][1],
- tx0[c][2], tx0[c][3],
- tx1[c][0], tx1[c][1],
- tx1[c][2], tx1[c][3]);
- }
-
- /* blend mipmap levels */
- for (c = 0; c < NUM_CHANNELS; c++) {
- rgba[c][j] = lerp(levelBlend, rgba[c][j], rgba2[c][j]);
- }
- }
- }
- }
- break;
+ switch (mode) {
+ case PIPE_TEX_WRAP_REPEAT:
+ return wrap_linear_repeat;
+ case PIPE_TEX_WRAP_CLAMP:
+ return wrap_linear_clamp;
+ case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
+ return wrap_linear_clamp_to_edge;
+ case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
+ return wrap_linear_clamp_to_border;
+ case PIPE_TEX_WRAP_MIRROR_REPEAT:
+ return wrap_linear_mirror_repeat;
+ case PIPE_TEX_WRAP_MIRROR_CLAMP:
+ return wrap_linear_mirror_clamp;
+ case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
+ return wrap_linear_mirror_clamp_to_edge;
+ case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
+ return wrap_linear_mirror_clamp_to_border;
default:
assert(0);
+ return wrap_linear_repeat;
}
}
-static void
-sp_get_samples_cube(const struct tgsi_sampler *sampler,
- const float s[QUAD_SIZE],
- const float t[QUAD_SIZE],
- const float p[QUAD_SIZE],
- boolean computeLambda,
- float lodbias,
- float rgba[NUM_CHANNELS][QUAD_SIZE])
+static compute_lambda_func
+get_lambda_func(const union sp_sampler_key key)
{
- unsigned faces[QUAD_SIZE], j;
- float ssss[4], tttt[4];
- for (j = 0; j < QUAD_SIZE; j++) {
- faces[j] = choose_cube_face(s[j], t[j], p[j], ssss + j, tttt + j);
+ if (key.bits.processor == TGSI_PROCESSOR_VERTEX)
+ return compute_lambda_vert;
+
+ switch (key.bits.target) {
+ case PIPE_TEXTURE_1D:
+ return compute_lambda_1d;
+ case PIPE_TEXTURE_2D:
+ case PIPE_TEXTURE_CUBE:
+ return compute_lambda_2d;
+ case PIPE_TEXTURE_3D:
+ return compute_lambda_3d;
+ default:
+ assert(0);
+ return compute_lambda_1d;
}
- sp_get_samples_2d_common(sampler, ssss, tttt, NULL,
- computeLambda, lodbias, rgba, faces);
}
-static void
-sp_get_samples_rect(const struct tgsi_sampler *tgsi_sampler,
- const float s[QUAD_SIZE],
- const float t[QUAD_SIZE],
- const float p[QUAD_SIZE],
- boolean computeLambda,
- float lodbias,
- float rgba[NUM_CHANNELS][QUAD_SIZE])
-{
- const struct sp_shader_sampler *samp = sp_shader_sampler(tgsi_sampler);
- const struct softpipe_context *sp = samp->sp;
- const uint unit = samp->unit;
- const struct pipe_texture *texture = sp->texture[unit];
- const struct pipe_sampler_state *sampler = sp->sampler[unit];
- const uint face = 0;
- unsigned level0, level1, j, imgFilter;
- int width, height;
- float levelBlend;
-
- choose_mipmap_levels(texture, sampler, s, t, p, computeLambda, lodbias,
- &level0, &level1, &levelBlend, &imgFilter);
-
- /* texture RECTS cannot be mipmapped */
- assert(level0 == level1);
-
- width = texture->width[level0];
- height = texture->height[level0];
-
- assert(width > 0);
-
- switch (imgFilter) {
- case PIPE_TEX_FILTER_NEAREST:
- {
- int x[4], y[4];
- nearest_texcoord_unnorm_4(sampler->wrap_s, s, width, x);
- nearest_texcoord_unnorm_4(sampler->wrap_t, t, height, y);
- for (j = 0; j < QUAD_SIZE; j++) {
- get_texel(tgsi_sampler, face, level0, x[j], y[j], 0, rgba, j);
- if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE) {
- shadow_compare(sampler, rgba, p, j);
- }
- }
- }
+static filter_func
+get_img_filter(const union sp_sampler_key key,
+ unsigned filter,
+ const struct pipe_sampler_state *sampler)
+{
+ switch (key.bits.target) {
+ case PIPE_TEXTURE_1D:
+ if (filter == PIPE_TEX_FILTER_NEAREST)
+ return img_filter_1d_nearest;
+ else
+ return img_filter_1d_linear;
break;
- case PIPE_TEX_FILTER_LINEAR:
- case PIPE_TEX_FILTER_ANISO:
+ case PIPE_TEXTURE_2D:
+ /* Try for fast path:
+ */
+ if (key.bits.is_pot &&
+ sampler->wrap_s == sampler->wrap_t &&
+ sampler->normalized_coords)
{
- int x0[4], y0[4], x1[4], y1[4];
- float xw[4], yw[4]; /* weights */
- linear_texcoord_unnorm_4(sampler->wrap_s, s, width, x0, x1, xw);
- linear_texcoord_unnorm_4(sampler->wrap_t, t, height, y0, y1, yw);
- for (j = 0; j < QUAD_SIZE; j++) {
- float tx[4][4]; /* texels */
- int c;
- get_texel(tgsi_sampler, face, level0, x0[j], y0[j], 0, tx, 0);
- get_texel(tgsi_sampler, face, level0, x1[j], y0[j], 0, tx, 1);
- get_texel(tgsi_sampler, face, level0, x0[j], y1[j], 0, tx, 2);
- get_texel(tgsi_sampler, face, level0, x1[j], y1[j], 0, tx, 3);
- if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE) {
- shadow_compare4(sampler, tx, p);
+ switch (sampler->wrap_s) {
+ case PIPE_TEX_WRAP_REPEAT:
+ switch (filter) {
+ case PIPE_TEX_FILTER_NEAREST:
+ return img_filter_2d_nearest_repeat_POT;
+ case PIPE_TEX_FILTER_LINEAR:
+ return img_filter_2d_linear_repeat_POT;
+ default:
+ break;
}
- for (c = 0; c < 4; c++) {
- rgba[c][j] = lerp_2d(xw[j], yw[j],
- tx[c][0], tx[c][1], tx[c][2], tx[c][3]);
+ break;
+ case PIPE_TEX_WRAP_CLAMP:
+ switch (filter) {
+ case PIPE_TEX_FILTER_NEAREST:
+ return img_filter_2d_nearest_clamp_POT;
+ default:
+ break;
}
}
}
+ /* Otherwise use default versions:
+ */
+ if (filter == PIPE_TEX_FILTER_NEAREST)
+ return img_filter_2d_nearest;
+ else
+ return img_filter_2d_linear;
+ break;
+ case PIPE_TEXTURE_CUBE:
+ if (filter == PIPE_TEX_FILTER_NEAREST)
+ return img_filter_cube_nearest;
+ else
+ return img_filter_cube_linear;
+ break;
+ case PIPE_TEXTURE_3D:
+ if (filter == PIPE_TEX_FILTER_NEAREST)
+ return img_filter_3d_nearest;
+ else
+ return img_filter_3d_linear;
break;
default:
assert(0);
+ return img_filter_1d_nearest;
}
}
/**
- * Common code for vertex/fragment program texture sampling.
+ * Bind the given texture object and texture cache to the sampler varient.
*/
-static INLINE void
-sp_get_samples(struct tgsi_sampler *tgsi_sampler,
- const float s[QUAD_SIZE],
- const float t[QUAD_SIZE],
- const float p[QUAD_SIZE],
- boolean computeLambda,
- float lodbias,
- float rgba[NUM_CHANNELS][QUAD_SIZE])
+void
+sp_sampler_varient_bind_texture( struct sp_sampler_varient *samp,
+ struct softpipe_tex_tile_cache *tex_cache,
+ const struct pipe_texture *texture )
{
- const struct sp_shader_sampler *samp = sp_shader_sampler(tgsi_sampler);
- const struct softpipe_context *sp = samp->sp;
- const uint unit = samp->unit;
- const struct pipe_texture *texture = sp->texture[unit];
- const struct pipe_sampler_state *sampler = sp->sampler[unit];
-
- if (!texture)
- return;
-
- switch (texture->target) {
- case PIPE_TEXTURE_1D:
- assert(sampler->normalized_coords);
- sp_get_samples_1d(tgsi_sampler, s, t, p, computeLambda, lodbias, rgba);
- break;
- case PIPE_TEXTURE_2D:
- if (sampler->normalized_coords)
- sp_get_samples_2d(tgsi_sampler, s, t, p, computeLambda, lodbias, rgba);
- else
- sp_get_samples_rect(tgsi_sampler, s, t, p, computeLambda, lodbias, rgba);
- break;
- case PIPE_TEXTURE_3D:
- assert(sampler->normalized_coords);
- sp_get_samples_3d(tgsi_sampler, s, t, p, computeLambda, lodbias, rgba);
- break;
- case PIPE_TEXTURE_CUBE:
- assert(sampler->normalized_coords);
- sp_get_samples_cube(tgsi_sampler, s, t, p, computeLambda, lodbias, rgba);
- break;
- default:
- assert(0);
- }
+ const struct pipe_sampler_state *sampler = samp->sampler;
-#if 0 /* DEBUG */
- {
- int i;
- printf("Sampled at %f, %f, %f:\n", s[0], t[0], p[0]);
- for (i = 0; i < 4; i++) {
- printf("Frag %d: %f %f %f %f\n", i,
- rgba[0][i],
- rgba[1][i],
- rgba[2][i],
- rgba[3][i]);
- }
- }
-#endif
+ samp->texture = texture;
+ samp->cache = tex_cache;
+ samp->xpot = util_unsigned_logbase2( texture->width0 );
+ samp->ypot = util_unsigned_logbase2( texture->height0 );
+ samp->level = CLAMP((int) sampler->min_lod, 0, (int) texture->last_level);
}
-/**
- * Called via tgsi_sampler::get_samples() when running a fragment shader.
- * Get four filtered RGBA values from the sampler's texture.
- */
void
-sp_get_samples_fragment(struct tgsi_sampler *tgsi_sampler,
- const float s[QUAD_SIZE],
- const float t[QUAD_SIZE],
- const float p[QUAD_SIZE],
- float lodbias,
- float rgba[NUM_CHANNELS][QUAD_SIZE])
+sp_sampler_varient_destroy( struct sp_sampler_varient *samp )
{
- sp_get_samples(tgsi_sampler, s, t, p, TRUE, lodbias, rgba);
+ FREE(samp);
}
/**
- * Called via tgsi_sampler::get_samples() when running a vertex shader.
- * Get four filtered RGBA values from the sampler's texture.
+ * Create a sampler varient for a given set of non-orthogonal state.
*/
-void
-sp_get_samples_vertex(struct tgsi_sampler *tgsi_sampler,
- const float s[QUAD_SIZE],
- const float t[QUAD_SIZE],
- const float p[QUAD_SIZE],
- float lodbias,
- float rgba[NUM_CHANNELS][QUAD_SIZE])
+struct sp_sampler_varient *
+sp_create_sampler_varient( const struct pipe_sampler_state *sampler,
+ const union sp_sampler_key key )
{
- sp_get_samples(tgsi_sampler, s, t, p, FALSE, lodbias, rgba);
+ struct sp_sampler_varient *samp = CALLOC_STRUCT(sp_sampler_varient);
+ if (!samp)
+ return NULL;
+
+ samp->sampler = sampler;
+ samp->key = key;
+
+ /* Note that (for instance) linear_texcoord_s and
+ * nearest_texcoord_s may be active at the same time, if the
+ * sampler min_img_filter differs from its mag_img_filter.
+ */
+ if (sampler->normalized_coords) {
+ samp->linear_texcoord_s = get_linear_wrap( sampler->wrap_s );
+ samp->linear_texcoord_t = get_linear_wrap( sampler->wrap_t );
+ samp->linear_texcoord_p = get_linear_wrap( sampler->wrap_r );
+
+ samp->nearest_texcoord_s = get_nearest_wrap( sampler->wrap_s );
+ samp->nearest_texcoord_t = get_nearest_wrap( sampler->wrap_t );
+ samp->nearest_texcoord_p = get_nearest_wrap( sampler->wrap_r );
+ }
+ else {
+ samp->linear_texcoord_s = get_linear_unorm_wrap( sampler->wrap_s );
+ samp->linear_texcoord_t = get_linear_unorm_wrap( sampler->wrap_t );
+ samp->linear_texcoord_p = get_linear_unorm_wrap( sampler->wrap_r );
+
+ samp->nearest_texcoord_s = get_nearest_unorm_wrap( sampler->wrap_s );
+ samp->nearest_texcoord_t = get_nearest_unorm_wrap( sampler->wrap_t );
+ samp->nearest_texcoord_p = get_nearest_unorm_wrap( sampler->wrap_r );
+ }
+
+ samp->compute_lambda = get_lambda_func( key );
+
+ samp->min_img_filter = get_img_filter(key, sampler->min_img_filter, sampler);
+ samp->mag_img_filter = get_img_filter(key, sampler->mag_img_filter, sampler);
+
+ switch (sampler->min_mip_filter) {
+ case PIPE_TEX_MIPFILTER_NONE:
+ if (sampler->min_img_filter == sampler->mag_img_filter)
+ samp->mip_filter = samp->min_img_filter;
+ else
+ samp->mip_filter = mip_filter_none;
+ break;
+
+ case PIPE_TEX_MIPFILTER_NEAREST:
+ samp->mip_filter = mip_filter_nearest;
+ break;
+
+ case PIPE_TEX_MIPFILTER_LINEAR:
+ if (key.bits.is_pot &&
+ sampler->min_img_filter == sampler->mag_img_filter &&
+ sampler->normalized_coords &&
+ sampler->wrap_s == PIPE_TEX_WRAP_REPEAT &&
+ sampler->wrap_t == PIPE_TEX_WRAP_REPEAT &&
+ sampler->min_img_filter == PIPE_TEX_FILTER_LINEAR)
+ {
+ samp->mip_filter = mip_filter_linear_2d_linear_repeat_POT;
+ }
+ else
+ {
+ samp->mip_filter = mip_filter_linear;
+ }
+ break;
+ }
+
+ if (sampler->compare_mode != PIPE_TEX_COMPARE_NONE) {
+ samp->compare = sample_compare;
+ }
+ else {
+ /* Skip compare operation by promoting the mip_filter function
+ * pointer:
+ */
+ samp->compare = samp->mip_filter;
+ }
+
+ if (key.bits.target == PIPE_TEXTURE_CUBE) {
+ samp->base.get_samples = sample_cube;
+ }
+ else {
+ samp->faces[0] = 0;
+ samp->faces[1] = 0;
+ samp->faces[2] = 0;
+ samp->faces[3] = 0;
+
+ /* Skip cube face determination by promoting the compare
+ * function pointer:
+ */
+ samp->base.get_samples = samp->compare;
+ }
+
+ return samp;
}
projects / mesa.git / blobdiff