[Mesa-dev] [PATCH 1/4] llvmpipe: fix using wrong format with MRT in blend code
sroland at vmware.com
sroland at vmware.com
Sat Jan 12 17:29:49 PST 2013
From: Roland Scheidegger <sroland at vmware.com>
We were passing in the rt index however this was always 0 for non-independent
blend case. (The format was only actually used to decide if the color mask
covered all channels so this went unnoticed and was discovered by accident.)
Additionally, there was a second problem because we do fixups in the key based
on color buffer format we cannot use non-independent blend anyway as the fixed
up values would never get used.
So always turn non-independent blending into independent.
---
src/gallium/drivers/llvmpipe/lp_bld_blend.h | 2 +-
src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c | 6 ++---
src/gallium/drivers/llvmpipe/lp_state_fs.c | 27 ++++++++++++++++++-----
src/gallium/drivers/llvmpipe/lp_test_blend.c | 2 +-
4 files changed, 26 insertions(+), 11 deletions(-)
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_blend.h b/src/gallium/drivers/llvmpipe/lp_bld_blend.h
index 0a1cea1..3a3be81 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_blend.h
+++ b/src/gallium/drivers/llvmpipe/lp_bld_blend.h
@@ -56,7 +56,7 @@ lp_build_blend(struct lp_build_context *bld,
LLVMValueRef
lp_build_blend_aos(struct gallivm_state *gallivm,
const struct pipe_blend_state *blend,
- const enum pipe_format *cbuf_format,
+ const enum pipe_format cbuf_format,
struct lp_type type,
unsigned rt,
LLVMValueRef src,
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c b/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c
index 641c253..65f66e0 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c
+++ b/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c
@@ -266,7 +266,7 @@ lp_build_blend_factor(struct lp_build_blend_aos_context *bld,
* @param blend the blend state of the shader variant
* @param cbuf_format format of the colour buffer
* @param type data type of the pixel vector
- * @param rt rt number
+ * @param rt render target index
* @param src blend src
* @param dst blend dst
* @param mask optional mask to apply to the blending result
@@ -278,7 +278,7 @@ lp_build_blend_factor(struct lp_build_blend_aos_context *bld,
LLVMValueRef
lp_build_blend_aos(struct gallivm_state *gallivm,
const struct pipe_blend_state *blend,
- const enum pipe_format *cbuf_format,
+ const enum pipe_format cbuf_format,
struct lp_type type,
unsigned rt,
LLVMValueRef src,
@@ -298,7 +298,7 @@ lp_build_blend_aos(struct gallivm_state *gallivm,
unsigned alpha_swizzle = UTIL_FORMAT_SWIZZLE_NONE;
unsigned i;
- desc = util_format_description(cbuf_format[rt]);
+ desc = util_format_description(cbuf_format);
/* Setup build context */
memset(&bld, 0, sizeof bld);
diff --git a/src/gallium/drivers/llvmpipe/lp_state_fs.c b/src/gallium/drivers/llvmpipe/lp_state_fs.c
index 5a8351b..3eae162 100644
--- a/src/gallium/drivers/llvmpipe/lp_state_fs.c
+++ b/src/gallium/drivers/llvmpipe/lp_state_fs.c
@@ -1645,12 +1645,21 @@ generate_unswizzled_blend(struct gallivm_state *gallivm,
/*
* Blending
*/
+ /* XXX this is broken for RGB8 formats -
+ * they get expanded from 12 to 16 elements (to include alpha)
+ * by convert_to_blend_type then reduced to 15 instead of 12
+ * by convert_from_blend_type (a simple fix though breaks A8...).
+ * R16G16B16 also crashes differently however something going wrong
+ * inside llvm handling npot vector sizes seemingly.
+ * It seems some cleanup could be done here (like skipping conversion/blend
+ * when not needed).
+ */
convert_to_blend_type(gallivm, out_format_desc, dst_type, row_type, dst, src_count);
for (i = 0; i < src_count; ++i) {
dst[i] = lp_build_blend_aos(gallivm,
&variant->key.blend,
- variant->key.cbuf_format,
+ out_format,
row_type,
rt,
src[i],
@@ -1999,7 +2008,6 @@ generate_fragment(struct llvmpipe_context *lp,
LLVMValueRef color_ptr;
LLVMValueRef stride;
LLVMValueRef index = lp_build_const_int32(gallivm, cbuf);
- unsigned rt = key->blend.independent_blend_enable ? cbuf : 0;
boolean do_branch = ((key->depth.enabled
|| key->stencil[0].enabled
@@ -2016,7 +2024,7 @@ generate_fragment(struct llvmpipe_context *lp,
LLVMBuildGEP(builder, stride_ptr, &index, 1, ""),
"");
- generate_unswizzled_blend(gallivm, rt, variant, key->cbuf_format[cbuf],
+ generate_unswizzled_blend(gallivm, cbuf, variant, key->cbuf_format[cbuf],
num_fs, fs_type, fs_mask, fs_out_color[cbuf],
context_ptr, color_ptr, stride, partial_mask, do_branch);
}
@@ -2505,6 +2513,15 @@ make_variant_key(struct llvmpipe_context *lp,
}
key->nr_cbufs = lp->framebuffer.nr_cbufs;
+
+ if (!key->blend.independent_blend_enable) {
+ /* we always need independent blend otherwise the fixups below won't work */
+ for (i = 1; i < key->nr_cbufs; i++) {
+ memcpy(&key->blend.rt[i], &key->blend.rt[0], sizeof(key->blend.rt[0]));
+ }
+ key->blend.independent_blend_enable = 1;
+ }
+
for (i = 0; i < lp->framebuffer.nr_cbufs; i++) {
enum pipe_format format = lp->framebuffer.cbufs[i]->format;
struct pipe_rt_blend_state *blend_rt = &key->blend.rt[i];
@@ -2516,8 +2533,6 @@ make_variant_key(struct llvmpipe_context *lp,
assert(format_desc->colorspace == UTIL_FORMAT_COLORSPACE_RGB ||
format_desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB);
- blend_rt->colormask = lp->blend->rt[i].colormask;
-
/*
* Mask out color channels not present in the color buffer.
*/
@@ -2539,7 +2554,7 @@ make_variant_key(struct llvmpipe_context *lp,
* Also, force rgb/alpha func/factors match, to make AoS blending easier.
*/
if (format_desc->swizzle[3] > UTIL_FORMAT_SWIZZLE_W ||
- format_desc->swizzle[3] == format_desc->swizzle[0]) {
+ format_desc->swizzle[3] == format_desc->swizzle[0]) {
blend_rt->rgb_src_factor = force_dst_alpha_one(blend_rt->rgb_src_factor);
blend_rt->rgb_dst_factor = force_dst_alpha_one(blend_rt->rgb_dst_factor);
blend_rt->alpha_func = blend_rt->rgb_func;
diff --git a/src/gallium/drivers/llvmpipe/lp_test_blend.c b/src/gallium/drivers/llvmpipe/lp_test_blend.c
index 9c0a076..754434d 100644
--- a/src/gallium/drivers/llvmpipe/lp_test_blend.c
+++ b/src/gallium/drivers/llvmpipe/lp_test_blend.c
@@ -172,7 +172,7 @@ add_blend_test(struct gallivm_state *gallivm,
dst = LLVMBuildLoad(builder, dst_ptr, "dst");
con = LLVMBuildLoad(builder, const_ptr, "const");
- res = lp_build_blend_aos(gallivm, blend, &format, type, rt, src, NULL, dst, NULL, con, NULL, swizzle, 4);
+ res = lp_build_blend_aos(gallivm, blend, format, type, rt, src, NULL, dst, NULL, con, NULL, swizzle, 4);
lp_build_name(res, "res");
--
1.7.9.5
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