vulkan: implement getAPIStats

src/modules/graphics/vulkan/Graphics.cpp

@@ -250,6 +250,8 @@ namespace love {
 				currentViewportWidth = 0.0f;
 				currentViewportHeight = 0.0f;
 
+				Vulkan::resetShaderSwitches();
+
 				return true;
 			}
 
@@ -298,6 +300,10 @@ namespace love {
 				capabilities.textureTypes[TEXTURE_CUBE] = false;
 			}
 
+			void Graphics::getAPIStats(int& shaderswitches) const {
+				shaderswitches = Vulkan::getNumShaderSwitches();
+			}
+
 			void Graphics::unSetMode() {
 				created = false;
 				vkDeviceWaitIdle(device);
@@ -498,6 +504,8 @@ namespace love {
 				Vulkan::cmdTransitionImageLayout(commandBuffers.at(imageIndex), swapChainImages[imageIndex], VK_IMAGE_LAYOUT_UNDEFINED, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
 
 				startRenderPass(nullptr, swapChainExtent.width, swapChainExtent.height);
+
+				Vulkan::resetShaderSwitches();
 			}
 
 			void Graphics::endRecordingGraphicsCommands() {

src/modules/graphics/vulkan/Graphics.h

@@ -135,7 +135,7 @@ namespace love {
 				graphics::StreamBuffer* newStreamBuffer(BufferUsage type, size_t size) override;
 				bool dispatch(int x, int y, int z) override { return false; }
 				void initCapabilities() override;
-				void getAPIStats(int& shaderswitches) const override { }
+				void getAPIStats(int& shaderswitches) const override;
 				void setRenderTargetsInternal(const RenderTargets& rts, int pixelw, int pixelh, bool hasSRGBtexture) override;
 
 			private:

src/modules/graphics/vulkan/Shader.cpp

@@ -35,6 +35,14 @@ namespace love {
 				}
 			}
 
+			void Shader::attach() {
+				if (Shader::current != this) {
+					Graphics::flushBatchedDrawsGlobal();
+					Shader::current = this;
+					Vulkan::shaderSwitch();
+				}
+			}
+
 			int Shader::getVertexAttributeIndex(const std::string& name) {
 				return vertexAttributeIndices.at(name);
 			}

src/modules/graphics/vulkan/Shader.h

@@ -3,6 +3,7 @@
 
 #include <graphics/Shader.h>
 #include <graphics/vulkan/ShaderStage.h>
+#include "Vulkan.h"
 #include <vulkan/vulkan.h>
 
 #include <map>
@@ -21,12 +22,7 @@ namespace love {
 					return shaderStages;
 				}
 
-				void attach() override {
-					if (Shader::current != this) {
-						Graphics::flushBatchedDrawsGlobal();
-						Shader::current = this;
-					}
-				}
+				void attach() override;
 
 				ptrdiff_t getHandle() const { return 0; }
 

src/modules/graphics/vulkan/Vulkan.cpp

@@ -6,6 +6,20 @@
 namespace love {
 	namespace graphics {
 		namespace vulkan {
+			static uint32_t numShaderSwitches;
+
+			void Vulkan::shaderSwitch() {
+				numShaderSwitches++;
+			}
+
+			uint32_t Vulkan::getNumShaderSwitches() {
+				return numShaderSwitches;
+			}
+			
+			void Vulkan::resetShaderSwitches() {
+				numShaderSwitches = 0;
+			}
+
 			VkFormat Vulkan::getVulkanVertexFormat(DataFormat format) {
 				switch (format) {
 				case DATAFORMAT_FLOAT:

src/modules/graphics/vulkan/Vulkan.h

@@ -18,6 +18,10 @@ namespace love {
 
 			class Vulkan {
 			public:
+				static void shaderSwitch();
+				static uint32_t getNumShaderSwitches();
+				static void resetShaderSwitches();
+
 				static VkFormat getVulkanVertexFormat(DataFormat format);
 				static TextureFormat getTextureFormat(PixelFormat);
 				static std::string getVendorName(uint32_t vendorId);