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Diffstat (limited to 'src/gallium/drivers/softpipe/sp_tex_sample.c')
-rw-r--r--src/gallium/drivers/softpipe/sp_tex_sample.c150
1 files changed, 90 insertions, 60 deletions
diff --git a/src/gallium/drivers/softpipe/sp_tex_sample.c b/src/gallium/drivers/softpipe/sp_tex_sample.c
index 903d21a0210..9c535f82a59 100644
--- a/src/gallium/drivers/softpipe/sp_tex_sample.c
+++ b/src/gallium/drivers/softpipe/sp_tex_sample.c
@@ -2,7 +2,7 @@
*
* 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
@@ -514,21 +514,15 @@ static float
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 lodbias)
+ const float p[QUAD_SIZE])
{
const struct pipe_texture *texture = samp->texture;
const struct pipe_sampler_state *sampler = samp->sampler;
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;
- float lambda;
- lambda = util_fast_log2(rho);
- lambda += lodbias + sampler->lod_bias;
- lambda = CLAMP(lambda, sampler->min_lod, sampler->max_lod);
-
- return lambda;
+ return util_fast_log2(rho);
}
@@ -536,8 +530,7 @@ 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],
- float lodbias)
+ const float p[QUAD_SIZE])
{
const struct pipe_texture *texture = samp->texture;
const struct pipe_sampler_state *sampler = samp->sampler;
@@ -548,13 +541,8 @@ compute_lambda_2d(const struct sp_sampler_varient *samp,
float maxx = MAX2(dsdx, dsdy) * texture->width0;
float maxy = MAX2(dtdx, dtdy) * texture->height0;
float rho = MAX2(maxx, maxy);
- float lambda;
-
- lambda = util_fast_log2(rho);
- lambda += lodbias + sampler->lod_bias;
- lambda = CLAMP(lambda, sampler->min_lod, sampler->max_lod);
- return lambda;
+ return util_fast_log2(rho);
}
@@ -562,8 +550,7 @@ 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],
- float lodbias)
+ const float p[QUAD_SIZE])
{
const struct pipe_texture *texture = samp->texture;
const struct pipe_sampler_state *sampler = samp->sampler;
@@ -576,31 +563,26 @@ compute_lambda_3d(const struct sp_sampler_varient *samp,
float maxx = MAX2(dsdx, dsdy) * texture->width0;
float maxy = MAX2(dtdx, dtdy) * texture->height0;
float maxz = MAX2(dpdx, dpdy) * texture->depth0;
- float rho, lambda;
+ float rho;
rho = MAX2(maxx, maxy);
rho = MAX2(rho, maxz);
- lambda = util_fast_log2(rho);
- lambda += lodbias + sampler->lod_bias;
- lambda = CLAMP(lambda, sampler->min_lod, sampler->max_lod);
-
- return lambda;
+ return util_fast_log2(rho);
}
/**
* Compute lambda for a vertex texture sampler.
- * Since there aren't derivatives to use, just return the LOD bias.
+ * Since there aren't derivatives to use, just return 0.
*/
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],
- float lodbias)
+ const float p[QUAD_SIZE])
{
- return lodbias;
+ return 0.0f;
}
@@ -769,7 +751,7 @@ 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],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
float rgba[NUM_CHANNELS][QUAD_SIZE])
{
const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
@@ -827,7 +809,7 @@ 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],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
float rgba[NUM_CHANNELS][QUAD_SIZE])
{
const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
@@ -866,7 +848,7 @@ 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],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
float rgba[NUM_CHANNELS][QUAD_SIZE])
{
const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
@@ -914,7 +896,7 @@ img_filter_1d_nearest(struct tgsi_sampler *tgsi_sampler,
const float s[QUAD_SIZE],
const float t[QUAD_SIZE],
const float p[QUAD_SIZE],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
float rgba[NUM_CHANNELS][QUAD_SIZE])
{
const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
@@ -949,7 +931,7 @@ img_filter_2d_nearest(struct tgsi_sampler *tgsi_sampler,
const float s[QUAD_SIZE],
const float t[QUAD_SIZE],
const float p[QUAD_SIZE],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
float rgba[NUM_CHANNELS][QUAD_SIZE])
{
const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
@@ -996,7 +978,7 @@ img_filter_cube_nearest(struct tgsi_sampler *tgsi_sampler,
const float s[QUAD_SIZE],
const float t[QUAD_SIZE],
const float p[QUAD_SIZE],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
float rgba[NUM_CHANNELS][QUAD_SIZE])
{
const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
@@ -1035,7 +1017,7 @@ img_filter_3d_nearest(struct tgsi_sampler *tgsi_sampler,
const float s[QUAD_SIZE],
const float t[QUAD_SIZE],
const float p[QUAD_SIZE],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
float rgba[NUM_CHANNELS][QUAD_SIZE])
{
const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
@@ -1076,7 +1058,7 @@ img_filter_1d_linear(struct tgsi_sampler *tgsi_sampler,
const float s[QUAD_SIZE],
const float t[QUAD_SIZE],
const float p[QUAD_SIZE],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
float rgba[NUM_CHANNELS][QUAD_SIZE])
{
const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
@@ -1115,7 +1097,7 @@ img_filter_2d_linear(struct tgsi_sampler *tgsi_sampler,
const float s[QUAD_SIZE],
const float t[QUAD_SIZE],
const float p[QUAD_SIZE],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
float rgba[NUM_CHANNELS][QUAD_SIZE])
{
const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
@@ -1161,7 +1143,7 @@ img_filter_cube_linear(struct tgsi_sampler *tgsi_sampler,
const float s[QUAD_SIZE],
const float t[QUAD_SIZE],
const float p[QUAD_SIZE],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
float rgba[NUM_CHANNELS][QUAD_SIZE])
{
const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
@@ -1209,7 +1191,7 @@ img_filter_3d_linear(struct tgsi_sampler *tgsi_sampler,
const float s[QUAD_SIZE],
const float t[QUAD_SIZE],
const float p[QUAD_SIZE],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
float rgba[NUM_CHANNELS][QUAD_SIZE])
{
const struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
@@ -1261,29 +1243,54 @@ img_filter_3d_linear(struct tgsi_sampler *tgsi_sampler,
}
+/* 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],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
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];
- lambda = samp->compute_lambda(samp, s, t, p, lodbias);
+ lambda = samp->compute_lambda(samp, s, t, p) + samp->sampler->lod_bias;
+
+ compute_lod(samp->sampler, lambda, lodbias, 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, 0, rgba );
+ samp->mag_img_filter( tgsi_sampler, s, t, p, NULL, rgba );
}
else if (level0 >= texture->last_level) {
samp->level = texture->last_level;
- samp->min_img_filter( tgsi_sampler, s, t, p, 0, rgba );
+ samp->min_img_filter( tgsi_sampler, s, t, p, NULL, rgba );
}
else {
float levelBlend = lambda - level0;
@@ -1292,10 +1299,10 @@ mip_filter_linear(struct tgsi_sampler *tgsi_sampler,
int c,j;
samp->level = level0;
- samp->min_img_filter( tgsi_sampler, s, t, p, 0, rgba0 );
+ samp->min_img_filter( tgsi_sampler, s, t, p, NULL, rgba0 );
samp->level = level0+1;
- samp->min_img_filter( tgsi_sampler, s, t, p, 0, rgba1 );
+ samp->min_img_filter( tgsi_sampler, s, t, p, NULL, rgba1 );
for (j = 0; j < QUAD_SIZE; j++) {
for (c = 0; c < 4; c++) {
@@ -1311,14 +1318,21 @@ mip_filter_nearest(struct tgsi_sampler *tgsi_sampler,
const float s[QUAD_SIZE],
const float t[QUAD_SIZE],
const float p[QUAD_SIZE],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
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];
- lambda = samp->compute_lambda(samp, s, t, p, lodbias);
+ lambda = samp->compute_lambda(samp, s, t, p) + samp->sampler->lod_bias;
+
+ compute_lod(samp->sampler, lambda, lodbias, lod);
+
+ /* XXX: Take into account all lod values.
+ */
+ lambda = lod[0];
if (lambda < 0.0) {
samp->level = 0;
@@ -1327,7 +1341,7 @@ mip_filter_nearest(struct tgsi_sampler *tgsi_sampler,
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, 0, rgba );
+ samp->min_img_filter( tgsi_sampler, s, t, p, NULL, rgba );
}
#if 0
@@ -1345,17 +1359,26 @@ mip_filter_none(struct tgsi_sampler *tgsi_sampler,
const float s[QUAD_SIZE],
const float t[QUAD_SIZE],
const float p[QUAD_SIZE],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
float rgba[NUM_CHANNELS][QUAD_SIZE])
{
struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
- float lambda = samp->compute_lambda(samp, s, t, p, lodbias);
+ float lambda;
+ float lod[QUAD_SIZE];
+
+ lambda = samp->compute_lambda(samp, s, t, p) + samp->sampler->lod_bias;
+
+ compute_lod(samp->sampler, lambda, lodbias, lod);
+
+ /* XXX: Take into account all lod values.
+ */
+ lambda = lod[0];
if (lambda < 0.0) {
- samp->mag_img_filter( tgsi_sampler, s, t, p, 0, rgba );
+ samp->mag_img_filter( tgsi_sampler, s, t, p, NULL, rgba );
}
else {
- samp->min_img_filter( tgsi_sampler, s, t, p, 0, rgba );
+ samp->min_img_filter( tgsi_sampler, s, t, p, NULL, rgba );
}
}
@@ -1371,15 +1394,22 @@ mip_filter_linear_2d_linear_repeat_POT(
const float s[QUAD_SIZE],
const float t[QUAD_SIZE],
const float p[QUAD_SIZE],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
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];
+
+ lambda = compute_lambda_2d(samp, s, t, p) + samp->sampler->lod_bias;
- lambda = compute_lambda_2d(samp, s, t, p, lodbias);
+ compute_lod(samp->sampler, lambda, lodbias, lod);
+
+ /* XXX: Take into account all lod values.
+ */
+ lambda = lod[0];
level0 = (int)lambda;
/* Catches both negative and large values of level0:
@@ -1390,7 +1420,7 @@ mip_filter_linear_2d_linear_repeat_POT(
else
samp->level = texture->last_level;
- img_filter_2d_linear_repeat_POT( tgsi_sampler, s, t, p, 0, rgba );
+ img_filter_2d_linear_repeat_POT( tgsi_sampler, s, t, p, NULL, rgba );
}
else {
float levelBlend = lambda - level0;
@@ -1399,10 +1429,10 @@ mip_filter_linear_2d_linear_repeat_POT(
int c,j;
samp->level = level0;
- img_filter_2d_linear_repeat_POT( tgsi_sampler, s, t, p, 0, rgba0 );
+ img_filter_2d_linear_repeat_POT( tgsi_sampler, s, t, p, NULL, rgba0 );
samp->level = level0+1;
- img_filter_2d_linear_repeat_POT( tgsi_sampler, s, t, p, 0, rgba1 );
+ img_filter_2d_linear_repeat_POT( tgsi_sampler, s, t, p, NULL, rgba1 );
for (j = 0; j < QUAD_SIZE; j++) {
for (c = 0; c < 4; c++) {
@@ -1422,7 +1452,7 @@ sample_compare(struct tgsi_sampler *tgsi_sampler,
const float s[QUAD_SIZE],
const float t[QUAD_SIZE],
const float p[QUAD_SIZE],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
float rgba[NUM_CHANNELS][QUAD_SIZE])
{
struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
@@ -1508,7 +1538,7 @@ sample_cube(struct tgsi_sampler *tgsi_sampler,
const float s[QUAD_SIZE],
const float t[QUAD_SIZE],
const float p[QUAD_SIZE],
- float lodbias,
+ const float lodbias[QUAD_SIZE],
float rgba[NUM_CHANNELS][QUAD_SIZE])
{
struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 20:12:18 +0000