diff options
| author | Brian Paul <brianp@vmware.com> | 2009-03-08 13:49:57 -0600 |
|---|---|---|
| committer | Brian Paul <brianp@vmware.com> | 2009-04-01 20:17:19 -0600 |
| commit | de2afd8688ceb45013d15be7c6e0995199b80e5a (patch) | |
| tree | b19eb2dc2565d385ad384a7a3f7e414b0cd464e3 /src/mesa/swrast/s_fragprog.c | |
| parent | f8304bf1ed27dc87f52593a437785f2793344767 (diff) | |
swrast: do texture sampling/combining in floating point
The code's cleaner and a step toward supporting float-valued texture sampling.
Some optimizations for common cases can be added and re-enabled...
Diffstat (limited to 'src/mesa/swrast/s_fragprog.c')
| -rw-r--r-- | src/mesa/swrast/s_fragprog.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/src/mesa/swrast/s_fragprog.c b/src/mesa/swrast/s_fragprog.c index ae1dea16a0..5f032bbd69 100644 --- a/src/mesa/swrast/s_fragprog.c +++ b/src/mesa/swrast/s_fragprog.c @@ -37,20 +37,17 @@ * and return results in 'colorOut'. */ static INLINE void -swizzle_texel(const GLchan texel[4], GLfloat colorOut[4], GLuint swizzle) +swizzle_texel(const GLfloat texel[4], GLfloat colorOut[4], GLuint swizzle) { if (swizzle == SWIZZLE_NOOP) { - colorOut[0] = CHAN_TO_FLOAT(texel[0]); - colorOut[1] = CHAN_TO_FLOAT(texel[1]); - colorOut[2] = CHAN_TO_FLOAT(texel[2]); - colorOut[3] = CHAN_TO_FLOAT(texel[3]); + COPY_4V(colorOut, texel); } else { GLfloat vector[6]; - vector[SWIZZLE_X] = CHAN_TO_FLOAT(texel[0]); - vector[SWIZZLE_Y] = CHAN_TO_FLOAT(texel[1]); - vector[SWIZZLE_Z] = CHAN_TO_FLOAT(texel[2]); - vector[SWIZZLE_W] = CHAN_TO_FLOAT(texel[3]); + vector[SWIZZLE_X] = texel[0]; + vector[SWIZZLE_Y] = texel[1]; + vector[SWIZZLE_Z] = texel[2]; + vector[SWIZZLE_W] = texel[3]; vector[SWIZZLE_ZERO] = 0.0F; vector[SWIZZLE_ONE] = 1.0F; colorOut[0] = vector[GET_SWZ(swizzle, 0)]; @@ -73,7 +70,7 @@ fetch_texel_lod( GLcontext *ctx, const GLfloat texcoord[4], GLfloat lambda, if (texObj) { SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLchan rgba[4]; + GLfloat rgba[4]; lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod); @@ -108,7 +105,7 @@ fetch_texel_deriv( GLcontext *ctx, const GLfloat texcoord[4], const GLfloat texW = (GLfloat) texImg->WidthScale; const GLfloat texH = (GLfloat) texImg->HeightScale; GLfloat lambda; - GLchan rgba[4]; + GLfloat rgba[4]; lambda = _swrast_compute_lambda(texdx[0], texdy[0], /* ds/dx, ds/dy */ texdx[1], texdy[1], /* dt/dx, dt/dy */ |