Canvases can now be used in SpriteBatches, ParticleSystems, and Meshes (resolves issue #782).

Canvases and Images are now subclasses of the new Texture class.
Added setTexture and getTexture methods for Meshes, ParticleSystems, and SpriteBatches (the old set/getImage methods are deprecated but not removed.)
Canvas texture coordinates are no longer flipped.

src/modules/graphics/opengl/Texture.h

@@ -0,0 +1,65 @@
+/**
+ * Copyright (c) 2006-2013 LOVE Development Team
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty.  In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ **/
+
+#ifndef LOVE_GRAPHICS_OPENGL_TEXTURE_H
+#define LOVE_GRAPHICS_OPENGL_TEXTURE_H
+
+// LOVE
+#include "graphics/Texture.h"
+#include "graphics/Volatile.h"
+#include "OpenGL.h"
+
+namespace love
+{
+namespace graphics
+{
+namespace opengl
+{
+
+class Texture : public love::graphics::Texture, public Volatile
+{
+public:
+
+	virtual ~Texture() {}
+
+	/**
+	 * Gets the OpenGL id for this texture.
+	 **/
+	virtual GLuint getGLTexture() const = 0;
+
+	/**
+	 * Any setup the texture might need to do before drawing, e.g. binding
+	 * the OpenGL texture for use.
+	 **/
+	virtual void predraw() const {}
+
+	/**
+	 * Any cleanup the texture might need to do directly after drawing.
+	 **/
+	virtual void postdraw() const {}
+
+
+}; // Texture
+
+} // opengl
+} // graphics
+} // love
+
+#endif // LOVE_GRAPHICS_OPENGL_TEXTURE_H