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[test/filter-bilinear-extents] Extend testing.

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First, explicitly set the filter mode to BILINEAR in case the default should
ever change. And then draw a second pattern with extents that in theory
are larger than the source surface in order to test handling of acquiring
out-of-bounds extents.
This commit is contained in:
Chris Wilson 2008-09-28 22:42:30 +01:00
parent 3ff86a4510
commit 117f643e49
1 changed files with 31 additions and 14 deletions
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45
test/filter-bilinear-extents.c
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@ -54,34 +54,51 @@ static const cairo_test_t test = {
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_surface_t *checker;
cairo_surface_t *image;
cairo_t *cr2;
/* Create a 2x2 blue+red checker */
checker = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 2, 2);
cr2 = cairo_create (checker);
image = cairo_image_surface_create (CAIRO_FORMAT_RGB24, 2, 2);
/* Fill with an opaque background to avoid a separate rgb24 ref image */
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_paint (cr);
/* First check handling of pattern extents > surface extents */
cairo_save (cr);
cairo_scale (cr, width/2., height/2.);
/* Create a solid black source to merge with the background */
cr2 = cairo_create (image);
cairo_set_source_rgb (cr2, 0, 0 ,0);
cairo_paint (cr2);
cairo_set_source_surface (cr, cairo_get_target (cr2), 0, 0);
cairo_destroy (cr2);
cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_BILINEAR);
cairo_paint (cr);
cairo_restore (cr);
/* Then scale to smaller so we can see the full bilinear extents */
cairo_save (cr);
cairo_translate (cr, PAD, PAD);
cairo_scale (cr, SCALE, SCALE);
cairo_translate (cr, 0.5, 0.5);
/* Create a 2x2 blue+red checkerboard source */
cr2 = cairo_create (image);
cairo_set_source_rgb (cr2, 1, 0 ,0); /* red */
cairo_paint (cr2);
cairo_set_source_rgb (cr2, 0, 0, 1); /* blue */
cairo_rectangle (cr2, 0, 1, 1, 1);
cairo_rectangle (cr2, 1, 0, 1, 1);
cairo_fill (cr2);
cairo_set_source_surface (cr, cairo_get_target (cr2), 0, 0);
cairo_destroy (cr2);
/* Draw our surface scaled with EXTEND_NONE */
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_paint (cr);
cairo_save (cr);
cairo_translate (cr, PAD, PAD);
cairo_scale (cr, SCALE, SCALE);
cairo_translate (cr, 0.5, 0.5);
cairo_set_source_surface (cr, checker, 0, 0);
cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_BILINEAR);
cairo_paint (cr);
cairo_restore (cr);
cairo_surface_destroy (checker);
cairo_surface_destroy (image);
return CAIRO_TEST_SUCCESS;
}