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/*
* Copyright © 2013 Samsung Electronics
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
* Author: Bryce Harrington <b.harrington@samsung.com>
*/
/* This test exercises scaling a png image to smaller pixel dimensions
* Currently, this exercises several of pixman's scaling filters.
#include "cairo-test.h"
#include <stdio.h>
#include <stdlib.h>
#include <cairo.h>
static const char png_filename[] = "quad-color.png";
/* Draw an image scaled down, with antialiasing disabled */
static cairo_test_status_t
draw (cairo_t *cr, int width, int height, cairo_filter_t filter)
{
const cairo_test_context_t *ctx = cairo_test_get_context (cr);
cairo_surface_t *image;
double x_scale, y_scale, scale;
cairo_set_source_rgb (cr, 1, 1, 1);
image = cairo_test_create_surface_from_png (ctx, png_filename);
x_scale = width * 1.0 / cairo_image_surface_get_width (image);
y_scale = height * 1.0 / cairo_image_surface_get_height (image);
scale = x_scale < y_scale ? x_scale : y_scale;
cairo_save (cr);
cairo_scale (cr, scale, scale);
cairo_set_source_surface (cr, image, 0, 0);
cairo_pattern_set_filter (cairo_get_source (cr), filter);
cairo_paint (cr);
cairo_restore (cr);
cairo_surface_destroy (image);
return CAIRO_TEST_SUCCESS;
}
draw_fast (cairo_t *cr, int width, int height)
return draw (cr, width, height, CAIRO_FILTER_FAST);
draw_good (cairo_t *cr, int width, int height)
return draw (cr, width, height, CAIRO_FILTER_GOOD);
draw_best (cairo_t *cr, int width, int height)
return draw (cr, width, height, CAIRO_FILTER_BEST);
draw_nearest (cairo_t *cr, int width, int height)
return draw (cr, width, height, CAIRO_FILTER_NEAREST);
draw_bilinear (cairo_t *cr, int width, int height)
return draw (cr, width, height, CAIRO_FILTER_BILINEAR);
CAIRO_TEST (pixman_downscale_fast_96,
"Tests scaling to equivalent size using the fast filter",
"image, transform, raster, downscale", /* keywords */
NULL, /* requirements */
96, 96,
NULL, draw_fast)
CAIRO_TEST (pixman_downscale_fast_95,
"Tests downscaling by a single pixel using the fast filter",
95, 95,
CAIRO_TEST (pixman_downscale_fast_24,
"Tests downscaling by an even multiple using the fast filter",
24, 24,
CAIRO_TEST (pixman_downscale_good_96,
"Tests scaling to equivalent size using the good filter",
NULL, draw_good)
CAIRO_TEST (pixman_downscale_good_95,
"Tests downscaling by a single pixel using the good filter",
CAIRO_TEST (pixman_downscale_good_24,
"Tests downscaling by an even multiple using the good filter",
CAIRO_TEST (pixman_downscale_best_96,
"Tests scaling to equivalent size using the best filter",
NULL, draw_best)
CAIRO_TEST (pixman_downscale_best_95,
"Tests downscaling by a single pixel using the best filter",
CAIRO_TEST (pixman_downscale_best_24,
"Tests downscaling by an even multiple using the best filter",
CAIRO_TEST (pixman_downscale_nearest_96,
"Tests scaling to equivalent size using the nearest filter",
NULL, draw_nearest)
CAIRO_TEST (pixman_downscale_nearest_95,
"Tests downscaling by a single pixel using the nearest filter",
CAIRO_TEST (pixman_downscale_nearest_24,
"Tests downscaling by an even multiple using the nearest filter",
CAIRO_TEST (pixman_downscale_bilinear_96,
"Tests scaling to equivalent size using the bilinear filter",
NULL, draw_bilinear)
CAIRO_TEST (pixman_downscale_bilinear_95,
"Tests downscaling by a single pixel using the bilinear filter",
CAIRO_TEST (pixman_downscale_bilinear_24,
"Tests downscaling by an even multiple using the bilinear filter",