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authorKeith Whitwell <[email protected]>2009-08-20 11:25:20 +0100
committerKeith Whitwell <[email protected]>2009-08-20 11:25:20 +0100
commit4f409da3456070946eda2d8ff5153b3b4306bb46 (patch)
treef5e5b87c5fab30c2779ff8d9f3d482ff98579211 /src/gallium/drivers/softpipe
parentd12bae9368e0c44a9943d9b37ab848ea307d70c7 (diff)
softpipe: optimized path for simple mipmap sampling
linear-mip-linear-repeat-POT sampling faspath, provides a very nice speedup to apps that do this common type of texturing. Test case: demos/terrain, turn fog off, turn texturing on. Without patch: 12 fps With patch: 20 fps.
Diffstat (limited to 'src/gallium/drivers/softpipe')
-rw-r--r--src/gallium/drivers/softpipe/sp_tex_sample.c95
1 files changed, 71 insertions, 24 deletions
diff --git a/src/gallium/drivers/softpipe/sp_tex_sample.c b/src/gallium/drivers/softpipe/sp_tex_sample.c
index 4651d781a95..b32ac9dabb3 100644
--- a/src/gallium/drivers/softpipe/sp_tex_sample.c
+++ b/src/gallium/drivers/softpipe/sp_tex_sample.c
@@ -921,8 +921,8 @@ sp_get_samples_2d_linear_repeat_POT(struct tgsi_sampler *tgsi_sampler,
}
else
{
- unsigned x1 = (uflr + 1) & (xpot - 1);
- unsigned y1 = (vflr + 1) & (ypot - 1);
+ unsigned x1 = (x0 + 1) & (xpot - 1);
+ unsigned y1 = (y0 + 1) & (ypot - 1);
get_texel_quad_2d_mt(tgsi_sampler, 0, level,
x0, y0, x1, y1, tx);
}
@@ -1028,42 +1028,92 @@ sp_get_samples_2d_linear_mip_linear_repeat_POT(struct tgsi_sampler *tgsi_sampler
struct sp_shader_sampler *samp = sp_shader_sampler(tgsi_sampler);
const struct pipe_texture *texture = samp->texture;
const struct pipe_sampler_state *sampler = samp->sampler;
- int level0, level1;
+ int level0;
float lambda;
lambda = compute_lambda(texture, sampler, s, t, p, lodbias);
level0 = (int)lambda;
- level1 = level0 + 1;
if (lambda < 0.0) {
samp->level = 0;
sp_get_samples_2d_linear_repeat_POT( tgsi_sampler,
- s, t, p, lodbias, rgba );
+ s, t, p, 0, rgba );
}
else if (level0 >= texture->last_level) {
samp->level = texture->last_level;
sp_get_samples_2d_linear_repeat_POT( tgsi_sampler,
- s, t, p, lodbias, rgba );
+ s, t, p, 0, rgba );
}
else {
- float rgba0[4][4];
- float rgba1[4][4];
- int c,j;
-
float levelBlend = lambda - level0; /* blending weight between levels */
+ unsigned xpot = 1 << (samp->xpot - level0);
+ unsigned ypot = 1 << (samp->ypot - level0);
+ unsigned xpot1 = 1 << (samp->xpot - (level0+1));
+ unsigned ypot1 = 1 << (samp->ypot - (level0+1));
+ unsigned j;
- samp->level = level0;
- sp_get_samples_2d_linear_repeat_POT( tgsi_sampler,
- s, t, p, lodbias, rgba0 );
+ for (j = 0; j < QUAD_SIZE; j++) {
+ int c;
+
+ float u = s[j] * xpot - 0.5F;
+ float v = t[j] * ypot - 0.5F;
- samp->level++;
- sp_get_samples_2d_linear_repeat_POT( tgsi_sampler,
- s, t, p, lodbias, rgba1 );
+ 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 *tx0[4];
+ const float *tx1[4];
+
+ if (x0 % TILE_SIZE != TILE_SIZE-1 &&
+ y0 % TILE_SIZE != TILE_SIZE-1)
+ {
+ get_texel_quad_2d(tgsi_sampler, 0, level0, x0, y0, tx0);
+ }
+ else
+ {
+ unsigned x1 = (x0 + 1) & (xpot - 1);
+ unsigned y1 = (y0 + 1) & (ypot - 1);
+ get_texel_quad_2d_mt(tgsi_sampler, 0, level0,
+ x0, y0, x1, y1, tx0);
+ }
- for (c = 0; c < 4; c++)
- for (j = 0; j < 4; j++)
- rgba[c][j] = lerp(levelBlend, rgba0[c][j], rgba1[c][j]);
- }
+ x0 /= 2;
+ y0 /= 2;
+ /* also need to adjust xw, yw?? */
+
+ if (x0 % TILE_SIZE != TILE_SIZE-1 &&
+ y0 % TILE_SIZE != TILE_SIZE-1)
+ {
+ get_texel_quad_2d(tgsi_sampler, 0, level0+1, x0, y0, tx1);
+ }
+ else
+ {
+ unsigned x1 = (x0 + 1) & (xpot1 - 1);
+ unsigned y1 = (y0 + 1) & (ypot1 - 1);
+ get_texel_quad_2d_mt(tgsi_sampler, 0, level0+1,
+ x0, y0, x1, y1, tx1);
+ }
+
+ /* interpolate R, G, B, A */
+ for (c = 0; c < 4; c++) {
+ float rgba0 = lerp_2d(xw, yw,
+ tx0[0][c], tx0[1][c],
+ tx0[2][c], tx0[3][c]);
+
+ float rgba1 = lerp_2d(xw, yw,
+ tx1[0][c], tx1[1][c],
+ tx1[2][c], tx1[3][c]);
+
+ rgba[c][j] = lerp(levelBlend, rgba0, rgba1);
+ }
+ }
+ }
}
/**
@@ -1567,10 +1617,7 @@ sp_get_samples_fragment(struct tgsi_sampler *tgsi_sampler,
if (sampler->wrap_s == PIPE_TEX_WRAP_REPEAT) {
switch (sampler->min_img_filter) {
case PIPE_TEX_FILTER_LINEAR:
- /* This one not working yet:
- */
- if (0)
- tgsi_sampler->get_samples = sp_get_samples_2d_linear_mip_linear_repeat_POT;
+ tgsi_sampler->get_samples = sp_get_samples_2d_linear_mip_linear_repeat_POT;
break;
default:
break;