/* * 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 */ /* 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 #include #include 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; } static cairo_test_status_t draw_fast (cairo_t *cr, int width, int height) { return draw (cr, width, height, CAIRO_FILTER_FAST); } static cairo_test_status_t draw_good (cairo_t *cr, int width, int height) { return draw (cr, width, height, CAIRO_FILTER_GOOD); } static cairo_test_status_t draw_best (cairo_t *cr, int width, int height) { return draw (cr, width, height, CAIRO_FILTER_BEST); } static cairo_test_status_t draw_nearest (cairo_t *cr, int width, int height) { return draw (cr, width, height, CAIRO_FILTER_NEAREST); } static cairo_test_status_t 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", "image, transform, raster, downscale", /* keywords */ NULL, /* requirements */ 95, 95, NULL, draw_fast) CAIRO_TEST (pixman_downscale_fast_24, "Tests downscaling by an even multiple using the fast filter", "image, transform, raster, downscale", /* keywords */ NULL, /* requirements */ 24, 24, NULL, draw_fast) CAIRO_TEST (pixman_downscale_good_96, "Tests scaling to equivalent size using the good filter", "image, transform, raster, downscale", /* keywords */ NULL, /* requirements */ 96, 96, NULL, draw_good) CAIRO_TEST (pixman_downscale_good_95, "Tests downscaling by a single pixel using the good filter", "image, transform, raster, downscale", /* keywords */ NULL, /* requirements */ 95, 95, NULL, draw_good) CAIRO_TEST (pixman_downscale_good_24, "Tests downscaling by an even multiple using the good filter", "image, transform, raster, downscale", /* keywords */ NULL, /* requirements */ 24, 24, NULL, draw_good) CAIRO_TEST (pixman_downscale_best_96, "Tests scaling to equivalent size using the best filter", "image, transform, raster, downscale", /* keywords */ NULL, /* requirements */ 96, 96, NULL, draw_best) CAIRO_TEST (pixman_downscale_best_95, "Tests downscaling by a single pixel using the best filter", "image, transform, raster, downscale", /* keywords */ NULL, /* requirements */ 95, 95, NULL, draw_best) CAIRO_TEST (pixman_downscale_best_24, "Tests downscaling by an even multiple using the best filter", "image, transform, raster, downscale", /* keywords */ NULL, /* requirements */ 24, 24, NULL, draw_best) CAIRO_TEST (pixman_downscale_nearest_96, "Tests scaling to equivalent size using the nearest filter", "image, transform, raster, downscale", /* keywords */ NULL, /* requirements */ 96, 96, NULL, draw_nearest) CAIRO_TEST (pixman_downscale_nearest_95, "Tests downscaling by a single pixel using the nearest filter", "image, transform, raster, downscale", /* keywords */ NULL, /* requirements */ 95, 95, NULL, draw_nearest) CAIRO_TEST (pixman_downscale_nearest_24, "Tests downscaling by an even multiple using the nearest filter", "image, transform, raster, downscale", /* keywords */ NULL, /* requirements */ 24, 24, NULL, draw_nearest) CAIRO_TEST (pixman_downscale_bilinear_96, "Tests scaling to equivalent size using the bilinear filter", "image, transform, raster, downscale", /* keywords */ NULL, /* requirements */ 96, 96, NULL, draw_bilinear) CAIRO_TEST (pixman_downscale_bilinear_95, "Tests downscaling by a single pixel using the bilinear filter", "image, transform, raster, downscale", /* keywords */ NULL, /* requirements */ 95, 95, NULL, draw_bilinear) CAIRO_TEST (pixman_downscale_bilinear_24, "Tests downscaling by an even multiple using the bilinear filter", "image, transform, raster, downscale", /* keywords */ NULL, /* requirements */ 24, 24, NULL, draw_bilinear)