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[Fix] (DirectVulkan): fall back to immutable images when the mutable probe fails, gate robustBufferAccess behind MOBILEGL_DISABLE_ROBUST_BUFFER_ACCESS, decode R32/RG32/R16-class readback formats, and warn when shaderStorageImage*WithoutFormat is unavailable

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swung0x48
2026-07-20 02:36:26 -04:00
parent bf7b5755cc
commit 64e4840de2
6 changed files with 127 additions and 3 deletions
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MobileGL/MG_Backend/DirectVulkan/Renderer/VulkanRenderer.cpp
+70 -1
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@@ -1622,6 +1622,63 @@ void main() {
case VK_FORMAT_R32G32B32A32_SFLOAT:
Memcpy(rgba, source, sizeof(Float) * 4);
return true;
// Single- and dual-channel formats the reinterpretation feature makes common
// as readback sources (iterationRP custom images are R32F/R32UI-class).
// Missing channels take GL's defaults: 0 for GB, 1 for alpha.
case VK_FORMAT_R32_SFLOAT: {
Float value = 0.0f;
Memcpy(&value, source, sizeof(value));
rgba[0] = value;
rgba[1] = 0.0f;
rgba[2] = 0.0f;
rgba[3] = 1.0f;
return true;
}
case VK_FORMAT_R32G32_SFLOAT: {
Float values[2] = {0.0f, 0.0f};
Memcpy(values, source, sizeof(values));
rgba[0] = values[0];
rgba[1] = values[1];
rgba[2] = 0.0f;
rgba[3] = 1.0f;
return true;
}
case VK_FORMAT_R32_UINT: {
Uint32 value = 0;
Memcpy(&value, source, sizeof(value));
rgba[0] = static_cast<Float>(value);
rgba[1] = 0.0f;
rgba[2] = 0.0f;
rgba[3] = 1.0f;
return true;
}
case VK_FORMAT_R32_SINT: {
Int32 value = 0;
Memcpy(&value, source, sizeof(value));
rgba[0] = static_cast<Float>(value);
rgba[1] = 0.0f;
rgba[2] = 0.0f;
rgba[3] = 1.0f;
return true;
}
case VK_FORMAT_R16_SFLOAT: {
Uint16 value = 0;
Memcpy(&value, source, sizeof(value));
rgba[0] = MG_Util::DecodeHalfBitsToFloat(value);
rgba[1] = 0.0f;
rgba[2] = 0.0f;
rgba[3] = 1.0f;
return true;
}
case VK_FORMAT_R16G16_SFLOAT:
for (SizeT component = 0; component < 2; ++component) {
Uint16 value = 0;
Memcpy(&value, source + component * sizeof(value), sizeof(value));
rgba[component] = MG_Util::DecodeHalfBitsToFloat(value);
}
rgba[2] = 0.0f;
rgba[3] = 1.0f;
return true;
default:
return false;
}
@@ -7166,7 +7223,10 @@ void main() {
// Match GL's robust buffer-fetch behavior where the Vulkan device supports it. This covers
// out-of-range fetches; arbitrary GL vertex strides/offsets still need the explicit tight
// repack in VertexInputStateFactory when they violate Vulkan's address-alignment rules.
deviceFeatures.robustBufferAccess = supportedDeviceFeatures.robustBufferAccess;
// MOBILEGL_DISABLE_ROBUST_BUFFER_ACCESS leaves it off to measure or dodge its GPU cost.
deviceFeatures.robustBufferAccess = MG_Config::Features.DisableRobustBufferAccess
? VK_FALSE
: supportedDeviceFeatures.robustBufferAccess;
deviceFeatures.geometryShader = supportedDeviceFeatures.geometryShader;
deviceFeatures.independentBlend = supportedDeviceFeatures.independentBlend;
m_independentBlendFeatureEnabled = deviceFeatures.independentBlend == VK_TRUE;
@@ -7196,6 +7256,15 @@ void main() {
if (m_unformattedFloatStorageImagesEnabled) {
deviceFeatures.shaderStorageImageReadWithoutFormat = VK_TRUE;
deviceFeatures.shaderStorageImageWriteWithoutFormat = VK_TRUE;
} else {
// Surface the degradation instead of failing silently: shader packs that bind a
// float storage image with a format different from its declaration (e.g.
// iterationRP) will render incorrectly on this device.
MGLOG_W("CreateLogicalDeviceAndQueues: shaderStorageImage*WithoutFormat unavailable "
"(read=%d write=%d); float storage-image format reinterpretation is disabled "
"and packs relying on it may misrender",
supportedDeviceFeatures.shaderStorageImageReadWithoutFormat,
supportedDeviceFeatures.shaderStorageImageWriteWithoutFormat);
}
deviceFeatures.drawIndirectFirstInstance = supportedDeviceFeatures.drawIndirectFirstInstance;
deviceFeatures.multiDrawIndirect = supportedDeviceFeatures.multiDrawIndirect;