Config: Add "enableBlitting" entry to toggle GL_EXT_framebuffer_blit

mkxp.conf.sample

@@ -95,6 +95,13 @@
 # subImageFix=false
 
 
+# Enable framebuffer blitting if the driver is
+# capable of it. Some drivers carry buggy
+# implementations of this functionality, so
+# disabling it can be used as a workaround
+# (default: enabled)
+#
+# enableBlitting=true
 # Set the base path of the game to '/path/to/game'
 # (default: executable directory)
 #

src/config.cpp

@@ -388,6 +388,7 @@ void Config::read(int argc, char *argv[])
 	PO_DESC(frameSkip, bool) \
 	PO_DESC(solidFonts, bool) \
 	PO_DESC(subImageFix, bool) \
+	PO_DESC(enableBlitting, bool) \
 	PO_DESC(gameFolder, std::string) \
 	PO_DESC(anyAltToggleFS, bool) \
 	PO_DESC(enableReset, bool) \

src/config.h

@@ -46,6 +46,7 @@ struct Config
 	bool solidFonts;
 
 	bool subImageFix;
+	bool enableBlitting;
 
 	std::string gameFolder;
 	bool anyAltToggleFS;

src/main.cpp

@@ -99,6 +99,9 @@ int rgssThreadFun(void *userdata)
 		return 0;
 	}
 
+	if (!threadData->config.enableBlitting)
+		gl.BlitFramebuffer = 0;
+
 	gl.ClearColor(0, 0, 0, 1);
 	gl.Clear(GL_COLOR_BUFFER_BIT);
 	SDL_GL_SwapWindow(win);