[Mesa-dev] [PATCH 2/3] softpipe: implement TXF support via get_texel callback
Dave Airlie
airlied at gmail.com
Thu Aug 25 07:51:57 PDT 2011
From: Dave Airlie <airlied at redhat.com>
This just calls the texel fetch functions directly bypassing the sampling,
notes:
1: loops inside switch should be more optimal.
2: borders can be sampled though only up to border depth, outside that
its undefined.
Signed-off-by: Dave Airlie <airlied at redhat.com>
---
src/gallium/drivers/softpipe/sp_tex_sample.c | 67 ++++++++++++++++++++++++++
1 files changed, 67 insertions(+), 0 deletions(-)
diff --git a/src/gallium/drivers/softpipe/sp_tex_sample.c b/src/gallium/drivers/softpipe/sp_tex_sample.c
index 93925f9..0d34557 100644
--- a/src/gallium/drivers/softpipe/sp_tex_sample.c
+++ b/src/gallium/drivers/softpipe/sp_tex_sample.c
@@ -2604,6 +2604,72 @@ sample_get_dims(struct tgsi_sampler *tgsi_sampler, int level,
}
}
+static void
+sample_get_texels(struct tgsi_sampler *tgsi_sampler,
+ const int v_i[QUAD_SIZE],
+ const int v_j[QUAD_SIZE],
+ const int v_k[QUAD_SIZE],
+ const int lod[QUAD_SIZE],
+ float rgba[NUM_CHANNELS][QUAD_SIZE])
+{
+ const struct sp_sampler_variant *samp = sp_sampler_variant(tgsi_sampler);
+ union tex_tile_address addr;
+ const struct pipe_resource *texture = samp->view->texture;
+ int j, c;
+ float *tx;
+
+ addr.value = 0;
+ /* TODO write a better test for LOD */
+ addr.bits.level = lod[0];
+
+ switch(texture->target) {
+ case PIPE_TEXTURE_1D:
+ for (j = 0; j < QUAD_SIZE; j++) {
+ tx = get_texel_2d(samp, addr, v_i[j], 0);
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = tx[c];
+ }
+ }
+ break;
+ case PIPE_TEXTURE_1D_ARRAY:
+ for (j = 0; j < QUAD_SIZE; j++) {
+ tx = get_texel_1d_array(samp, addr, v_i[j], v_j[j]);
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = tx[c];
+ }
+ }
+ break;
+ case PIPE_TEXTURE_2D:
+ case PIPE_TEXTURE_RECT:
+ for (j = 0; j < QUAD_SIZE; j++) {
+ tx = get_texel_2d(samp, addr, v_i[j], v_j[j]);
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = tx[c];
+ }
+ }
+ break;
+ case PIPE_TEXTURE_2D_ARRAY:
+ for (j = 0; j < QUAD_SIZE; j++) {
+ tx = get_texel_2d_array(samp, addr, v_i[j], v_j[j], v_k[j]);
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = tx[c];
+ }
+ }
+ break;
+ case PIPE_TEXTURE_3D:
+ for (j = 0; j < QUAD_SIZE; j++) {
+ tx = get_texel_3d(samp, addr, v_i[j], v_j[j], v_k[j]);
+ for (c = 0; c < 4; c++) {
+ rgba[c][j] = tx[c];
+ }
+ }
+ break;
+ case PIPE_TEXTURE_CUBE: /* TXF can't work on CUBE according to spec */
+ default:
+ assert(!"Unknown or CUBE texture type in TXF processing\n");
+ break;
+ }
+}
/**
* Create a sampler variant for a given set of non-orthogonal state.
*/
@@ -2730,5 +2796,6 @@ sp_create_sampler_variant( const struct pipe_sampler_state *sampler,
}
samp->base.get_dims = sample_get_dims;
+ samp->base.get_texel = sample_get_texels;
return samp;
}
--
1.7.6
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