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109 lines
3.4 KiB
C
109 lines
3.4 KiB
C
/*
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* Copyright 2009 Benjamin Otte
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Author: Benjamin Otte <otte@gnome.org>
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*/
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#include "cairo-test.h"
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/*
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* Exercise a bug in the projection of a rotated trapezoid mask.
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* I used CAIRO_ANTIALIAS_NONE and a single-color source in the test to get
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* rid of aliasing issues in the output images. This makes some issues
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* slightly less visible, but still fails for all of them. If you want to
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* get a clearer view:
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* #define ANTIALIAS CAIRO_ANTIALIAS_DEFAULT
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*/
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#define ANTIALIAS CAIRO_ANTIALIAS_NONE
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static const char png_filename[] = "romedalen.png";
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static cairo_pattern_t *
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get_source (const cairo_test_context_t *ctx,
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int *width, int *height)
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{
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cairo_surface_t *surface;
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cairo_pattern_t *pattern;
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if (ANTIALIAS == CAIRO_ANTIALIAS_NONE) {
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cairo_t *cr;
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surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, 256, 192);
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cr = cairo_create (surface);
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cairo_set_source_rgb (cr, 0.75, 0.25, 0.25);
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cairo_paint (cr);
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pattern = cairo_pattern_create_for_surface (cairo_get_target (cr));
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cairo_destroy (cr);
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} else {
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surface = cairo_test_create_surface_from_png (ctx, png_filename);
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pattern = cairo_pattern_create_for_surface (surface);
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}
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*width = cairo_image_surface_get_width (surface);
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*height = cairo_image_surface_get_height (surface);
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cairo_surface_destroy (surface);
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return pattern;
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}
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static cairo_test_status_t
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draw (cairo_t *cr, int width, int height)
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{
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cairo_pattern_t *image;
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int img_width, img_height;
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image = get_source (cairo_test_get_context (cr),
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&img_width, &img_height);
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/* we don't want to debug antialiasing artifacts */
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cairo_set_antialias (cr, ANTIALIAS);
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/* dark grey background */
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cairo_set_source_rgb (cr, 0.25, 0.25, 0.25);
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cairo_paint (cr);
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/* magic transform */
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cairo_translate (cr, 10, -40);
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cairo_rotate (cr, -0.05);
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/* place the image on our surface */
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cairo_set_source (cr, image);
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/* paint the image */
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cairo_rectangle (cr, 0, 0, img_width, img_height);
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cairo_fill (cr);
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cairo_pattern_destroy (image);
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return CAIRO_TEST_SUCCESS;
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}
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CAIRO_TEST (xcomposite_projection,
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"Test a bug with XRenderComposite reference computation when projecting the first trapezoid onto 16.16 space",
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"xlib", /* keywords */
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"target=raster", /* requirements */
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300, 150,
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NULL, draw)
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