Added love.graphics.getStats. It returns a table with performance-related graphics statistics. Currently it contains these fields:

drawcalls: The number of internal draw calls made so far in the current frame.

canvasswitches: The number of times the active Canvas has been changed so far in the current frame.

texturememory: The approximate amount of video memory (in bytes) used by OpenGL textures created by Images, Canvases, and Fonts.

images: The number of active Image objects.

canvases: The number of active Canvas objects.

fonts: The number of active Font objects.

src/modules/graphics/opengl/OpenGL.h

@@ -133,6 +133,12 @@ public:
 		OpenGL ≷
 	};
 
+	struct Stats
+	{
+		size_t textureMemory;
+		int    drawCalls;
+	} stats;
+
 	OpenGL();
 
 	/**
@@ -159,13 +165,17 @@ public:
 	void prepareDraw();
 
 	/**
-	 * glDrawArraysInstanced with a pseudo-instancing fallback.
+	 * glDrawArrays and glDrawElements which increment the draw-call counter by
+	 * themselves.
 	 **/
-	void drawArraysInstanced(GLenum mode, GLint first, GLsizei count, GLsizei primcount);
+	void drawArrays(GLenum mode, GLint first, GLsizei count);
+	void drawElements(GLenum mode, GLsizei count, GLenum type, const void *indices);
 
 	/**
-	 * glDrawElementsInstanced with a pseudo-instancing fallback.
+	 * glDrawArraysInstanced and glDrawElementsInstanced with pseudo-instancing
+	 * fallbacks. They also increment the draw-call counter (once per call).
 	 **/
+	void drawArraysInstanced(GLenum mode, GLint first, GLsizei count, GLsizei primcount);
 	void drawElementsInstanced(GLenum mode, GLsizei count, GLenum type, const void *indices, GLsizei primcount);
 
 	/**
@@ -279,6 +289,8 @@ public:
 	 **/
 	int getMaxRenderTargets() const;
 
+	void updateTextureMemorySize(size_t oldsize, size_t newsize);
+
 	/**
 	 * Get the GPU vendor of this OpenGL context.
 	 **/