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very simple texture cache implementation

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This commit is contained in:
Brian 2007-08-08 12:02:52 -06:00
parent c8cc1e86f6
commit 267cf16e06
2 changed files with 29 additions and 2 deletions
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26
src/mesa/pipe/softpipe/sp_tex_sample.c
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@ -471,12 +471,34 @@ sp_get_sample_2d(struct tgsi_sampler *sampler,
switch (sampler->state->min_filter) {
case PIPE_TEX_FILTER_NEAREST:
{
GLint x, y;
GLint x, y, cx, cy;
const GLfloat *src;
x = nearest_texcoord(sampler->state->wrap_s, strq[0],
sampler->texture->width0);
y = nearest_texcoord(sampler->state->wrap_t, strq[1],
sampler->texture->height0);
ps->get_tile(ps, x, y, 1, 1, rgba);
cx = x / SAMPLER_CACHE_SIZE;
cy = y / SAMPLER_CACHE_SIZE;
if (cx != sampler->cache_x || cy != sampler->cache_y) {
/* cache miss, replace cache with new tile */
sampler->cache_x = cx;
sampler->cache_y = cy;
ps->get_tile(ps,
cx * SAMPLER_CACHE_SIZE,
cy * SAMPLER_CACHE_SIZE,
SAMPLER_CACHE_SIZE, SAMPLER_CACHE_SIZE,
(GLfloat *) sampler->cache);
/*printf("cache miss (%d, %d)\n", x, y);*/
}
else {
/*printf("cache hit (%d, %d)\n", x, y);*/
}
cx = x % SAMPLER_CACHE_SIZE;
cy = y % SAMPLER_CACHE_SIZE;
src = sampler->cache[cy][cx];
COPY_4V(rgba, src);
}
break;
case PIPE_TEX_FILTER_LINEAR:

5
src/mesa/pipe/tgsi/core/tgsi_exec.h
View file

@ -21,6 +21,8 @@ struct tgsi_exec_vector
union tgsi_exec_channel xyzw[4];
};
#define SAMPLER_CACHE_SIZE 8
struct tgsi_sampler
{
const struct pipe_sampler_state *state;
@ -28,6 +30,9 @@ struct tgsi_sampler
void (*get_sample)(struct tgsi_sampler *sampler,
const GLfloat strq[4], GLfloat lambda, GLfloat rgba[4]);
void *pipe; /*XXX temporary*/
GLint cache_x, cache_y;
GLfloat cache[SAMPLER_CACHE_SIZE][SAMPLER_CACHE_SIZE][4];
};
struct tgsi_exec_labels