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Remove _cairo_image_surface_is_alpha_only in favor of just looking at content value.

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This commit is contained in:
Carl Worth 2006-06-15 14:56:59 -07:00
parent 82496a6f7c
commit 0ba040d7f6
1 changed files with 1 additions and 15 deletions
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16
src/cairo-image-surface.c
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@ -806,20 +806,6 @@ _cairo_image_surface_fill_rectangles (void *abstract_surface,
return CAIRO_STATUS_SUCCESS;
}
static cairo_bool_t
_cairo_image_surface_is_alpha_only (cairo_image_surface_t *surface)
{
int bpp, alpha, red, green, blue;
if (surface->format != (cairo_format_t) -1)
return surface->format == CAIRO_FORMAT_A1 || surface->format == CAIRO_FORMAT_A8;
pixman_format_get_masks (pixman_image_get_format (surface->pixman_image),
&bpp, &alpha, &red, &green, &blue);
return red == 0 && blue == 0 && green == 0;
}
static cairo_int_status_t
_cairo_image_surface_composite_trapezoids (cairo_operator_t op,
cairo_pattern_t *pattern,
@ -859,7 +845,7 @@ _cairo_image_surface_composite_trapezoids (cairo_operator_t op,
*/
if (op == CAIRO_OPERATOR_ADD &&
_cairo_pattern_is_opaque_solid (pattern) &&
_cairo_image_surface_is_alpha_only (dst) &&
dst->base.content == CAIRO_CONTENT_ALPHA &&
!dst->has_clip &&
antialias != CAIRO_ANTIALIAS_NONE)
{