[cairo] Cairo with OpenGL

[Maximilian Ernestus]

> Yes, you want to use an image surface.
I use a mac and installed cairo via MacPorts. I don't have the "cairo- 
surface.c" file. I get the following error during runtime (Debugging  
mode because Release mode gets linking errors that i don't know how to  
get rid of):

Xcode could not locate source file: cairo-surface.c (line: 383)

How do i get this "cairo-surface.c" file? The only variants of the  
cairo port are:

	universal: Build for multiple architectures
	glitz: Add glitz graphics interface
	macosx: Platform variant, do not select manually
	quartz: Add Quartz graphics interface
	no_x11: Disable support for X11
	x11_xcb: Use libxcb for X11 protocol communication

I have "cairo @1.8.6_4+macosx+quartz" installed. Do i have to build  
cairo manualy?

Greetings,


Maximilian

> Uploading to an OpenGL texture
> is no different than uploading any other texture. Assuming you have an
> ARGB32 surface:
>
> void *bits = cairo_image_surface_get_data(cairo_get_target(cr));
>
> cairo_surface_flush(cairo_get_target(cr));
> glBindTexture(GL_TEXTURE_RECTANGLE_ARB, textureId);
> glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, width, height, 0,
> GL_BGRA, GL_UNSIGNED_BYTE, bits);
>
> Of course, if you are targeting OpenGL 2.1+ or have power-of-two
> textures then you do not need to use GL_TEXTURE_RECTANGLE_ARB :)
>
> Performance is satisfactory, so long as you do not redraw the surface
> every frame (caching is important).
>
> Regards, Freddie.
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