Prevent rasterizing fragments outside the framebuffer

src/Device/Renderer.cpp

@@ -178,7 +178,7 @@ namespace sw
 	}
 
 	void Renderer::draw(const sw::Context* context, VkIndexType indexType, unsigned int count, int baseVertex,
-			TaskEvents *events, int instanceID, int viewID, void *indexBuffer,
+			TaskEvents *events, int instanceID, int viewID, void *indexBuffer, const VkExtent3D& framebufferExtent,
 			PushConstantStorage const & pushConstants, bool update)
 	{
 		if(count == 0) { return; }
@@ -384,10 +384,10 @@ namespace sw
 
 		// Scissor
 		{
-			data->scissorX0 = scissor.offset.x;
-			data->scissorX1 = scissor.offset.x + scissor.extent.width;
-			data->scissorY0 = scissor.offset.y;
-			data->scissorY1 = scissor.offset.y + scissor.extent.height;
+			data->scissorX0 = clamp<int>(scissor.offset.x, 0, framebufferExtent.width);
+			data->scissorX1 = clamp<int>(scissor.offset.x + scissor.extent.width, 0, framebufferExtent.width);
+			data->scissorY0 = clamp<int>(scissor.offset.y, 0, framebufferExtent.height);
+			data->scissorY1 = clamp<int>(scissor.offset.y + scissor.extent.height, 0, framebufferExtent.height);
 		}
 
 		// Push constants

src/Device/Renderer.hpp

@@ -202,7 +202,7 @@ namespace sw
 		bool hasOcclusionQuery() const { return occlusionQuery != nullptr; }
 
 		void draw(const sw::Context* context, VkIndexType indexType, unsigned int count, int baseVertex,
-				TaskEvents *events, int instanceID, int viewID, void *indexBuffer,
+				TaskEvents *events, int instanceID, int viewID, void *indexBuffer, const VkExtent3D& framebufferExtent,
 				PushConstantStorage const & pushConstants, bool update = true);
 
 		// Viewport & Clipper

src/Vulkan/VkCommandBuffer.cpp

@@ -617,6 +617,7 @@ struct DrawBase : public CommandBuffer::Command
 				{
 					executionState.renderer->draw(&context, executionState.indexType, indexBuffer.first, vertexOffset,
 												  executionState.events, instance, viewID, indexBuffer.second,
+												  executionState.renderPassFramebuffer->getExtent(),
 												  executionState.pushConstants);
 				}
 			}

src/Vulkan/VkFramebuffer.cpp

@@ -23,7 +23,8 @@ namespace vk
 
 Framebuffer::Framebuffer(const VkFramebufferCreateInfo* pCreateInfo, void* mem) :
 	attachmentCount(pCreateInfo->attachmentCount),
-	attachments(reinterpret_cast<ImageView**>(mem))
+	attachments(reinterpret_cast<ImageView**>(mem)),
+	extent{pCreateInfo->width, pCreateInfo->height, pCreateInfo->layers}
 {
 	for(uint32_t i = 0; i < attachmentCount; i++)
 	{

src/Vulkan/VkFramebuffer.hpp

@@ -36,9 +36,12 @@ public:
 	ImageView *getAttachment(uint32_t index) const;
 	void resolve(const RenderPass* renderPass, uint32_t subpassIndex);
 
+	const VkExtent3D& getExtent() const { return extent; }
+
 private:
-	uint32_t    attachmentCount = 0;
-	ImageView** attachments = nullptr;
+	uint32_t         attachmentCount = 0;
+	ImageView**      attachments = nullptr;
+	const VkExtent3D extent = {};
 };
 
 static inline Framebuffer* Cast(VkFramebuffer object)