vulkan: implement vsync setting

src/modules/graphics/Shader.h

@@ -178,14 +178,6 @@ public:
  		Vector4 normalMatrix[3]; // 3x3 matrix padded to an array of 3 vector4s.
  		Vector4 screenSizeParams;
  		Colorf constantColor;
-
-		bool operator==(const BuiltinUniformData& other) {
-			auto first = *this;
-			return first.transformMatrix == other.transformMatrix && first.projectionMatrix == other.projectionMatrix
-				&& first.normalMatrix[0] == other.normalMatrix[0] && first.normalMatrix[1] == other.normalMatrix[1]
-				&& first.normalMatrix[2] == other.normalMatrix[2] && first.screenSizeParams == other.screenSizeParams
-				&& first.constantColor == other.constantColor;
-		}
  	};
 
 	// Pointer to currently active Shader.

src/modules/graphics/vulkan/Graphics.cpp

@@ -972,14 +972,30 @@ VkSurfaceFormatKHR Graphics::chooseSwapSurfaceFormat(const std::vector<VkSurface
 }
 
 VkPresentModeKHR Graphics::chooseSwapPresentMode(const std::vector<VkPresentModeKHR>& availablePresentModes) {
-	// needed ?
-	for (const auto& availablePresentMode : availablePresentModes) {
-		if (availablePresentMode == VK_PRESENT_MODE_MAILBOX_KHR) {
-			return availablePresentMode;
+	int vsync = Vulkan::getVsync();
+
+	switch (vsync) {
+	case -1: {
+		auto it = std::find(availablePresentModes.begin(), availablePresentModes.end(), VK_PRESENT_MODE_FIFO_RELAXED_KHR);
+		if (it != availablePresentModes.end()) {
+			return VK_PRESENT_MODE_FIFO_RELAXED_KHR;
 		}
 	}
-
-	return VK_PRESENT_MODE_FIFO_KHR;
+	case 1: {
+		auto it = std::find(availablePresentModes.begin(), availablePresentModes.end(), VK_PRESENT_MODE_MAILBOX_KHR);
+		if (it != availablePresentModes.end()) {
+			return VK_PRESENT_MODE_MAILBOX_KHR;
+		}
+	}
+	case 0: {
+		auto it = std::find(availablePresentModes.begin(), availablePresentModes.end(), VK_PRESENT_MODE_IMMEDIATE_KHR);
+		if (it != availablePresentModes.end()) {
+			return VK_PRESENT_MODE_IMMEDIATE_KHR;
+		}
+	}
+	default:
+		return VK_PRESENT_MODE_FIFO_KHR;
+	}
 }
 
 VkExtent2D Graphics::chooseSwapExtent(const VkSurfaceCapabilitiesKHR& capabilities) {

src/modules/graphics/vulkan/Vulkan.cpp

@@ -7,6 +7,7 @@ namespace love {
 namespace graphics {
 namespace vulkan {
 static uint32_t numShaderSwitches;
+static int vsync = 1;
 
 void Vulkan::shaderSwitch() {
 	numShaderSwitches++;
@@ -20,6 +21,14 @@ void Vulkan::resetShaderSwitches() {
 	numShaderSwitches = 0;
 }
 
+void Vulkan::setVsync(int value) {
+	vsync = value;
+}
+
+int Vulkan::getVsync() {
+	return vsync;
+}
+
 VkFormat Vulkan::getVulkanVertexFormat(DataFormat format) {
 	switch (format) {
 	case DATAFORMAT_FLOAT:

src/modules/graphics/vulkan/Vulkan.h

@@ -30,6 +30,9 @@ public:
 	static uint32_t getNumShaderSwitches();
 	static void resetShaderSwitches();
 
+	static void setVsync(int vsync);
+	static int getVsync();
+
 	static VkFormat getVulkanVertexFormat(DataFormat format);
 	static TextureFormat getTextureFormat(PixelFormat);
 	static std::string getVendorName(uint32_t vendorId);