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-rw-r--r--src/gallium/auxiliary/vl/vl_mpeg12_mc_renderer.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/src/gallium/auxiliary/vl/vl_mpeg12_mc_renderer.c b/src/gallium/auxiliary/vl/vl_mpeg12_mc_renderer.c
index fb420cbe1f7..5c0404b4b07 100644
--- a/src/gallium/auxiliary/vl/vl_mpeg12_mc_renderer.c
+++ b/src/gallium/auxiliary/vl/vl_mpeg12_mc_renderer.c
@@ -341,7 +341,7 @@ fetch_ycbcr(struct vl_mpeg12_mc_renderer *r, struct ureg_program *shader, struct
ureg_MOV(shader, ureg_writemask(t_tc, TGSI_WRITEMASK_Z), ureg_scalar(eb[0][0], TGSI_SWIZZLE_X + i));
}
- /* Nouveau can't writemask tex dst regs (yet?), do in two steps */
+ /* Nouveau and r600g can't writemask tex dst regs (yet?), do in two steps */
ureg_TEX(shader, tmp, TGSI_TEXTURE_3D, ureg_src(t_tc), sampler[i]);
ureg_MOV(shader, ureg_writemask(texel, TGSI_WRITEMASK_X << i), ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_X));
}
@@ -368,11 +368,13 @@ create_intra_frag_shader(struct vl_mpeg12_mc_renderer *r)
/*
* texel = fetch_ycbcr()
- * fragment = texel * scale
+ * fragment = texel * scale + 0.5
*/
field = calc_field(shader);
texel = fetch_ycbcr(r, shader, field);
- ureg_MUL(shader, fragment, ureg_src(texel), ureg_scalar(ureg_imm1f(shader, SCALE_FACTOR_16_TO_9), TGSI_SWIZZLE_X));
+ ureg_MAD(shader, fragment, ureg_src(texel),
+ ureg_scalar(ureg_imm1f(shader, SCALE_FACTOR_16_TO_9), TGSI_SWIZZLE_X),
+ ureg_scalar(ureg_imm1f(shader, 0.5f), TGSI_SWIZZLE_X));
ureg_release_temporary(shader, field);
ureg_release_temporary(shader, texel);