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[Fix] (DirectVulkan): narrow the blended depth-write quirk to order-independent accumulation blends, exempting sorted-transparency, gl_FragDepth writers and fully masked attachments

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swung0x48
2026-07-20 07:39:25 -04:00
parent f9f455144c
commit c158bfa584
9 changed files with 527 additions and 27 deletions
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MobileGL/MG_Backend/DirectVulkan/Renderer/VulkanRenderer.cpp
+16 -7
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@@ -2112,18 +2112,16 @@ void main() {
// the pipelines of a multi-pass depth-equality chain (even with the SPIR-V
// Invariant decoration), so a blended depth-writing prepass makes later
// equality-compare passes drop whole primitives (MC 26.3 improved-transparency
// clouds flicker black). Suppress blended depth writes there;
// clouds flicker black). Suppress depth writes on accumulation-blended pipelines
// there (see PipelineFactory::ShouldSuppressDepthWrite for the exact scope);
// MOBILEGL_MAGMA_DISABLE_BLENDED_DEPTH_WRITE forces the quirk on or off on any
// driver.
static constexpr Uint32 kVendorIdQualcomm = 0x5143;
const MG_Config::QuirkOverride quirkOverride =
MG_Config::Features.MagmaDisableBlendedDepthWriteQuirk;
const Bool suppressBlendedDepthWrite =
quirkOverride == MG_Config::QuirkOverride::ForceOn ||
(quirkOverride == MG_Config::QuirkOverride::Auto &&
m_physicalDevice.properties.vendorID == kVendorIdQualcomm);
const Bool suppressBlendedDepthWrite = PipelineFactory::ShouldSuppressBlendedDepthWriteForDevice(
quirkOverride, m_physicalDevice.properties.vendorID);
if (suppressBlendedDepthWrite) {
MGLOG_I("DirectVulkan: suppressing depth writes on blended pipelines "
MGLOG_I("DirectVulkan: suppressing depth writes on accumulation-blended pipelines "
"(driver lacks cross-pipeline position invariance)%s",
quirkOverride == MG_Config::QuirkOverride::ForceOn ? " (forced on)" : "");
}
@@ -3466,6 +3464,7 @@ void main() {
.backStencilPassOp = MG_Util::ConvertStencilOperationToVkEnum(backStencil.PassDepthPassOp),
.backStencilDepthFailOp = MG_Util::ConvertStencilOperationToVkEnum(backStencil.PassDepthFailOp),
.backStencilCompareOp = MG_Util::ConvertDepthTestFuncToVkEnum(backStencil.Func),
.fragmentReplacesDepth = programObj.fragmentReplacesDepth,
.stages = &programObj.stages,
.vertexInputState = pipelineVertexInputState
};
@@ -3670,6 +3669,16 @@ void main() {
"disabling blending on attachments with this format (first hit: attachment %u textureId=%d program=%u)",
static_cast<Int>(colorAttachmentFormat), i, textureExternalIndex,
program.GetExternalIndex());
if (PipelineFactory::IsSuppressBlendedDepthWriteEnabled()) {
// With blending force-disabled the blended depth-write quirk can
// never fire for pipelines on this format, so a depth-equality
// chain that accumulates into it (MC 26.3 OIT depth_bounds on
// RGBA32F) keeps its depth writes and may flicker on this driver.
MGLOG_W("GetOrCreatePipeline: format=%d is not blendable, so the blended "
"depth-write quirk cannot apply to it; depth-equality chains "
"accumulating into this format may flicker",
static_cast<Int>(colorAttachmentFormat));
}
}
}
if (!blendSupportIt->second) {