SDL/Qt: Better resizing & fullscreen support

include/renderer.hpp

@@ -53,10 +53,12 @@ class Renderer {
 
 	// Should hw renderers hash textures? Stored separately from emulatorConfig because we'll be accessing it constantly, might be merged eventually
 	bool hashTextures = false;
+	bool outputSizeChanged = true;
 
 	EmulatorConfig* emulatorConfig = nullptr;
 
 	void doSoftwareTextureCopy(u32 inputAddr, u32 outputAddr, u32 copySize, u32 inputWidth, u32 inputGap, u32 outputWidth, u32 outputGap);
+
   public:
 	Renderer(GPU& gpu, const std::array<u32, regNum>& internalRegs, const std::array<u32, extRegNum>& externalRegs);
 	virtual ~Renderer();
@@ -121,6 +123,7 @@ class Renderer {
 	void setDepthBufferLoc(u32 loc) { depthBufferLoc = loc; }
 
 	void setOutputSize(u32 width, u32 height) {
+		outputSizeChanged = true;
 		outputWindowWidth = width;
 		outputWindowHeight = height;
 	}

include/renderer_gl/renderer_gl.hpp

@@ -40,7 +40,7 @@ class RendererGL final : public Renderer {
 	OpenGL::VertexArray hwShaderVAO;
 	OpenGL::VertexBuffer vbo;
 
-	// Data
+	// Data that will be uploaded to the ubershader
 	struct {
 		// TEV configuration uniform locations
 		GLint textureEnvSourceLoc = -1;
@@ -146,6 +146,15 @@ class RendererGL final : public Renderer {
 	PICA::ShaderGen::FragmentGenerator fragShaderGen;
 	OpenGL::Driver driverInfo;
 
+	// Information about the final 3DS screen -> Window blit, accounting for things like scaling and shifting the output based on
+	// the window's dimensions.
+	struct {
+		int destX = 0;
+		int destY = 0;
+		int destWidth = 400;
+		int destHeight = 480;
+	} blitInfo;
+
 	MAKE_LOG_FUNCTION(log, rendererLogger)
 	void setupBlending();
 	void setupStencilTest(bool stencilEnable);

include/renderer_mtl/renderer_mtl.hpp

@@ -88,6 +88,16 @@ class RendererMTL final : public Renderer {
 	MTL::Texture* lastColorTexture = nullptr;
 	MTL::Texture* lastDepthTexture = nullptr;
 
+	// Information about the final 3DS screen -> Window blit, accounting for things like scaling and shifting the output based on
+	// the window's dimensions.
+	struct {
+		float topScreenX = 0;
+		float topScreenY = 0;
+		float bottomScreenX = 40;
+		float bottomScreenY = 240;
+		float scale = 1.0;
+	} blitInfo;
+
 	// Debug
 	std::string nextRenderPassName;