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if the surface has CAIRO_CONTENT_COLOR_ALPHA, render it on a checkerboard

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2007-12-28  Sven Neumann  <sven@gimp.org>

	* app/widgets/gimpviewrenderer.c (gimp_view_renderer_real_draw):
	if the surface has CAIRO_CONTENT_COLOR_ALPHA, render it on a
	checkerboard background.

	* app/widgets/gimpviewrenderergradient.[ch]: just draw the
	gradient with alpha-transparency instead of doing the blend on 
the
	checkerboard here.

	* app/widgets/gimpcolormapeditor.c: formatting.


svn path=/trunk/; revision=24446
This commit is contained in:
Sven Neumann
2007-12-28 17:17:10 +00:00
committed by Sven Neumann
parent 3649a32ef8
commit f97ebdf72d
5 changed files with 44 additions and 93 deletions
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27
app/widgets/gimpviewrenderer.c
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@ -713,15 +713,28 @@ gimp_view_renderer_real_draw (GimpViewRenderer *renderer,
}
else if (renderer->surface)
{
gint width = renderer->width;
gint height = renderer->height;
gint x, y;
cairo_content_t content = cairo_surface_get_content (renderer->surface);
gint width = renderer->width;
gint height = renderer->height;
x = area->x + (area->width - width) / 2;
y = area->y + (area->height - height) / 2;
cairo_translate (cr,
area->x + (area->width - width) / 2,
area->y + (area->height - height) / 2);
cairo_set_source_surface (cr, renderer->surface, x, y);
cairo_rectangle (cr, x, y, width, height);
cairo_rectangle (cr, 0, 0, width, height);
if (content == CAIRO_CONTENT_COLOR_ALPHA)
{
cairo_pattern_t *pattern;
pattern = gimp_cairo_checkerboard_create (cr, GIMP_CHECK_SIZE_SM);
cairo_set_source (cr, pattern);
cairo_pattern_destroy (pattern);
cairo_fill_preserve (cr);
}
cairo_set_source_surface (cr, renderer->surface, 0, 0);
cairo_fill (cr);
}
}