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gl/traps: ensure RGBA surface before upload image to texture for GLES2

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As GLESv2 may only use an RGBA surface as its source for texture
uploads, we therefore need to perform a conversion.
This commit is contained in:
Henry Song 2012-09-27 19:22:23 +00:00 • committed by Chris Wilson
parent 188c34b40d
commit 66500ef29f
1 changed files with 32 additions and 0 deletions
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32
src/cairo-gl-traps-compositor.c
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@ -50,6 +50,7 @@
#include "cairo-image-surface-private.h"
#include "cairo-spans-compositor-private.h"
#include "cairo-surface-backend-private.h"
#include "cairo-surface-offset-private.h"
static cairo_int_status_t
acquire (void *abstract_dst)
@ -300,6 +301,36 @@ traps_to_operand (void *_dst,
return image->status;
}
/* GLES2 only supports RGB/RGBA when uploading */
if (_cairo_gl_get_flavor () == CAIRO_GL_FLAVOR_ES) {
cairo_surface_pattern_t pattern;
cairo_surface_t *rgba_image;
/* XXX perform this fixup inside _cairo_gl_draw_image() */
rgba_image =
_cairo_image_surface_create_with_pixman_format (NULL,
_cairo_is_little_endian () ? PIXMAN_a8b8g8r8 : PIXMAN_r8g8b8a8,
extents->width,
extents->height,
0);
if (unlikely (rgba_image->status))
return rgba_image->status;
_cairo_pattern_init_for_surface (&pattern, image);
status = _cairo_surface_paint (rgba_image, CAIRO_OPERATOR_SOURCE,
&pattern.base, NULL);
_cairo_pattern_fini (&pattern.base);
cairo_surface_destroy (image);
image = rgba_image;
if (unlikely (status)) {
cairo_surface_destroy (image);
return status;
}
}
mask = _cairo_surface_create_similar_scratch (_dst,
CAIRO_CONTENT_COLOR_ALPHA,
extents->width,
@ -315,6 +346,7 @@ traps_to_operand (void *_dst,
extents->width, extents->height,
0, 0);
cairo_surface_destroy (image);
if (unlikely (status))
goto error;