Switch software renderer to lockable framebuffer

SDL2 surfaces may require locking

src/Backends/Rendering/Software.cpp

@@ -35,7 +35,7 @@ RenderBackend_Surface* RenderBackend_Init(const char *window_title, int screen_w
 	if (WindowBackend_Software_CreateWindow(window_title, screen_width, screen_height, fullscreen))
 	{
 		size_t pitch;
-		framebuffer.pixels = WindowBackend_Software_GetFramebuffer(&pitch);
+		framebuffer.pixels = WindowBackend_Software_LockFramebuffer(&pitch);
 		framebuffer.width = screen_width;
 		framebuffer.height = screen_height;
 		framebuffer.pitch = pitch;
@@ -57,10 +57,12 @@ void RenderBackend_Deinit(void)
 
 void RenderBackend_DrawScreen(void)
 {
+	WindowBackend_Software_UnlockFramebuffer();
+
 	WindowBackend_Software_Display();
 
 	size_t pitch;
-	framebuffer.pixels = WindowBackend_Software_GetFramebuffer(&pitch);
+	framebuffer.pixels = WindowBackend_Software_LockFramebuffer(&pitch);
 	framebuffer.pitch = pitch;
 }
 

src/Backends/Rendering/Window/Software.h

@@ -4,6 +4,7 @@
 
 bool WindowBackend_Software_CreateWindow(const char *window_title, int screen_width, int screen_height, bool fullscreen);
 void WindowBackend_Software_DestroyWindow(void);
-unsigned char* WindowBackend_Software_GetFramebuffer(size_t *pitch);
+unsigned char* WindowBackend_Software_LockFramebuffer(size_t *pitch);
+void WindowBackend_Software_UnlockFramebuffer(void);
 void WindowBackend_Software_Display(void);
 void WindowBackend_Software_HandleWindowResize(unsigned int width, unsigned int height);

src/Backends/Rendering/Window/Software/GLFW3.cpp

@@ -95,13 +95,18 @@ void WindowBackend_Software_DestroyWindow(void)
 	glfwDestroyWindow(window);
 }
 
-unsigned char* WindowBackend_Software_GetFramebuffer(size_t *pitch)
+unsigned char* WindowBackend_Software_LockFramebuffer(size_t *pitch)
 {
 	*pitch = framebuffer_width * 3;
 
 	return framebuffer;
 }
 
+void WindowBackend_Software_UnlockFramebuffer(void)
+{
+	// Nothing to do here
+}
+
 void WindowBackend_Software_Display(void)
 {
 	glClear(GL_COLOR_BUFFER_BIT);

src/Backends/Rendering/Window/Software/Null.cpp

@@ -28,13 +28,18 @@ void WindowBackend_Software_DestroyWindow(void)
 	free(framebuffer);
 }
 
-unsigned char* WindowBackend_Software_GetFramebuffer(size_t *pitch)
+unsigned char* WindowBackend_Software_LockFramebuffer(size_t *pitch)
 {
 	*pitch = framebuffer_pitch;
 
 	return framebuffer;
 }
 
+void WindowBackend_Software_UnlockFramebuffer(void)
+{
+	// Nothing to do here
+}
+
 void WindowBackend_Software_Display(void)
 {
 	

src/Backends/Rendering/Window/Software/SDL2.cpp

@@ -64,13 +64,18 @@ void WindowBackend_Software_DestroyWindow(void)
 	SDL_DestroyWindow(window);
 }
 
-unsigned char* WindowBackend_Software_GetFramebuffer(size_t *pitch)
+unsigned char* WindowBackend_Software_LockFramebuffer(size_t *pitch)
 {
 	*pitch = framebuffer_sdlsurface->pitch;
 
 	return (unsigned char*)framebuffer_sdlsurface->pixels;
 }
 
+void WindowBackend_Software_UnlockFramebuffer(void)
+{
+	// Nothing to do here
+}
+
 void WindowBackend_Software_Display(void)
 {
 	if (SDL_BlitSurface(framebuffer_sdlsurface, NULL, window_sdlsurface, NULL) < 0)

src/Backends/Rendering/Window/Software/WiiU.cpp

@@ -206,13 +206,18 @@ void WindowBackend_Software_DestroyWindow(void)
 	free(fake_framebuffer);
 }
 
-unsigned char* WindowBackend_Software_GetFramebuffer(size_t *pitch)
+unsigned char* WindowBackend_Software_LockFramebuffer(size_t *pitch)
 {
 	*pitch = fake_framebuffer_width * 3;
 
 	return fake_framebuffer;
 }
 
+void WindowBackend_Software_UnlockFramebuffer(void)
+{
+	// Nothing to do here
+}
+
 ATTRIBUTE_HOT void WindowBackend_Software_Display(void)
 {
 	// Convert frame from RGB24 to RGBA32, and upload it to the GPU texture