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[dxvk] Fix dual-source blending with multiple bound render targets

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We can't write to more than one render target, so zero out the write
mask. Also, normalize blend state for disabled render targets for
good measure.
This commit is contained in:
Philip Rebohle 2022-07-15 23:51:04 +02:00
parent 9e7b93b55b
commit e2340d7224
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GPG Key ID: C8CC613427A31C99
1 changed files with 16 additions and 9 deletions
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25
src/dxvk/dxvk_graphics.cpp
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@ -215,6 +215,10 @@ namespace dxvk {
// mask for any attachment that the fragment shader does not write to.
uint32_t fsOutputMask = fs ? fs->info().outputMask : 0u;
// Dual-source blending can only write to one render target
if (state.useDualSourceBlending())
fsOutputMask &= 0x1;
const VkColorComponentFlags rgbaWriteMask
= VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT
| VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT;
@ -229,20 +233,23 @@ namespace dxvk {
rtInfo.colorAttachmentCount = i + 1;
auto formatInfo = lookupFormatInfo(rtColorFormats[i]);
cbAttachments[i] = state.omBlend[i].state();
if (!(fsOutputMask & (1 << i)) || !formatInfo) {
cbAttachments[i].colorWriteMask = 0;
} else {
if (cbAttachments[i].colorWriteMask != rgbaWriteMask) {
cbAttachments[i].colorWriteMask = util::remapComponentMask(
if ((fsOutputMask & (1 << i)) && formatInfo) {
VkColorComponentFlags writeMask = state.omBlend[i].colorWriteMask();
if (writeMask != rgbaWriteMask) {
writeMask = util::remapComponentMask(
state.omBlend[i].colorWriteMask(), state.omSwizzle[i].mapping());
}
cbAttachments[i].colorWriteMask &= formatInfo->componentMask;
writeMask &= formatInfo->componentMask;
if (cbAttachments[i].colorWriteMask == formatInfo->componentMask) {
cbAttachments[i].colorWriteMask = rgbaWriteMask;
if (writeMask == formatInfo->componentMask)
writeMask = rgbaWriteMask;
if (writeMask) {
cbAttachments[i] = state.omBlend[i].state();
cbAttachments[i].colorWriteMask = writeMask;
}
}
}