vulkan: don't try to enable blending with integer canvases.

src/modules/graphics/vulkan/Graphics.cpp

@@ -2346,6 +2346,7 @@ void Graphics::prepareDraw(const VertexAttributes &attributes, const BufferBindi
 	configuration.colorChannelMask = states.back().colorMask;
 	configuration.msaaSamples = renderPassState.msaa;
 	configuration.numColorAttachments = renderPassState.numColorAttachments;
+	configuration.packedColorAttachmentFormats = renderPassState.packedColorAttachmentFormats;
 	configuration.primitiveType = primitiveType;
 
 	if (optionalDeviceExtensions.extendedDynamicState)
@@ -2415,6 +2416,7 @@ void Graphics::setDefaultRenderPass()
 	renderPassState.height = static_cast<float>(swapChainExtent.height);
 	renderPassState.msaa = msaaSamples;
 	renderPassState.numColorAttachments = 1;
+	renderPassState.packedColorAttachmentFormats = (uint8)swapChainPixelFormat;
 	renderPassState.transitionImages.clear();
 
 	RenderPassConfiguration renderPassConfiguration{};
@@ -2542,6 +2544,9 @@ void Graphics::setRenderPass(const RenderTargets &rts, int pixelw, int pixelh, b
 	renderPassState.height = static_cast<float>(pixelh);
 	renderPassState.msaa = VK_SAMPLE_COUNT_1_BIT;
 	renderPassState.numColorAttachments = static_cast<uint32_t>(rts.colors.size());
+	renderPassState.packedColorAttachmentFormats = 0;
+	for (size_t i = 0; i < rts.colors.size(); i++)
+		renderPassState.packedColorAttachmentFormats |= ((uint64)rts.colors[i].texture->getPixelFormat()) << (i * 8ull);
 	renderPassState.transitionImages = std::move(transitionImages);
 }
 
@@ -2783,6 +2788,16 @@ VkPipeline Graphics::createGraphicsPipeline(Shader *shader, const GraphicsPipeli
 
 	std::vector<VkPipelineColorBlendAttachmentState> colorBlendAttachments(configuration.numColorAttachments, colorBlendAttachment);
 
+	if (configuration.blendState.enable)
+	{
+		for (uint32 i = 0; i < configuration.numColorAttachments; i++)
+		{
+			PixelFormat format = (PixelFormat)((configuration.packedColorAttachmentFormats >> (i * 8ull)) & 0xFF);
+			if (!isPixelFormatSupported(format, PIXELFORMATUSAGEFLAGS_BLEND))
+				colorBlendAttachments[i].blendEnable = false;
+		}
+	}
+
 	VkPipelineColorBlendStateCreateInfo colorBlending{};
 	colorBlending.sType = VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO;
 	colorBlending.logicOpEnable = VK_FALSE;

src/modules/graphics/vulkan/Graphics.h

@@ -198,6 +198,7 @@ struct RenderpassState
 	VkPipeline pipeline = VK_NULL_HANDLE;
 	std::vector<std::tuple<VkImage, PixelFormat, VkImageLayout, VkImageLayout, int, int>> transitionImages;
 	uint32_t numColorAttachments = 0;
+	uint64 packedColorAttachmentFormats = 0;
 	float width = 0.0f;
 	float height = 0.0f;
 	VkSampleCountFlagBits msaa = VK_SAMPLE_COUNT_1_BIT;

src/modules/graphics/vulkan/Shader.h

@@ -56,6 +56,7 @@ struct GraphicsPipelineConfiguration
 	VkSampleCountFlagBits msaaSamples;
 	uint32_t numColorAttachments;
 	PrimitiveType primitiveType;
+	uint64 packedColorAttachmentFormats;
 
 	struct DynamicState
 	{