[cairo] [patch] gl: create BGRA texture and avoid conversion

[Chris Wilson]

On Fri, Feb 01, 2013 at 04:10:40PM +0000, Henry (Yu) Song - SISA wrote:
> Hi, Chris 
> 
> Thanks for comments. First patch - add _cairo_image_surface_coerce_to_pixman_format().

And as you discovered, not quite what you needed for your task. So I've
pushed

t c391093f40472c2300f38d0e5857858f85586b60
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Fri Feb 1 16:31:49 2013 +0000

    image: Add a convenience function for creating an image from another's data
    
    The GL backend would like to extract a rectangle from another surface
    and convert it to a different pixel format. The
    _cairo_image_surface_create_from_image() does that by returning a new
    image that has the contents of the specified rectangle in the source

Which provides

cairo_image_surface_t *
_cairo_image_surface_create_from_image (cairo_image_surface_t *other,
                                       pixman_format_code_t format,
                                       int x, int y,
                                       int width, int height, int stride);

for you to use.

Hope this helps,
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre