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Diffstat (limited to 'test/filter-nearest-transformed.c')
-rw-r--r-- | test/filter-nearest-transformed.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/test/filter-nearest-transformed.c b/test/filter-nearest-transformed.c new file mode 100644 index 000000000..ba56f7c5a --- /dev/null +++ b/test/filter-nearest-transformed.c @@ -0,0 +1,120 @@ +/* + * Copyright © 2008 Chris Wilson + * + * 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: Chris Wilson <chris@chris-wilson.co.uk> + */ + +#include "cairo-test.h" + +/* + * We wish to check the optimization away of non-fractional translations + * for NEAREST surface patterns under a few transformations. + */ + +static const char png_filename[] = "romedalen.png"; + +/* A single, black pixel */ +static const uint32_t black_pixel = 0xff000000; + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + const cairo_test_context_t *ctx = cairo_test_get_context (cr); + unsigned int i, j, k; + cairo_surface_t *surface; + cairo_pattern_t *pattern; + const cairo_matrix_t transform[] = { + { 1, 0, 0, 1, 0, 0 }, + { -1, 0, 0, 1, 8, 0 }, + { 1, 0, 0, -1, 0, 8 }, + { -1, 0, 0, -1, 8, 8 }, + }; + const cairo_matrix_t ctx_transform[] = { + { 1, 0, 0, 1, 0, 0 }, + { -1, 0, 0, 1, 14, 0 }, + { 1, 0, 0, -1, 0, 14 }, + { -1, 0, 0, -1, 14, 14 }, + }; + const double colour[][3] = { + {0, 0, 0}, + {1, 0, 0}, + {0, 1, 0}, + {0, 0, 1}, + }; + cairo_matrix_t m; + + surface = cairo_image_surface_create_for_data ((uint8_t *) &black_pixel, + CAIRO_FORMAT_ARGB32, + 1, 1, 4); + pattern = cairo_pattern_create_for_surface (surface); + cairo_surface_destroy (surface); + + cairo_pattern_set_filter (pattern, CAIRO_FILTER_NEAREST); + + surface = cairo_test_create_surface_from_png (ctx, png_filename); + + /* Fill background white */ + cairo_set_source_rgb (cr, 1, 1, 1); + cairo_paint (cr); + + cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE); + + for (k = 0; k < ARRAY_LENGTH (transform); k++) { + /* draw a "large" section from an image */ + cairo_save (cr); { + cairo_set_matrix(cr, &ctx_transform[k]); + cairo_rectangle (cr, 0, 0, 7, 7); + cairo_clip (cr); + + cairo_set_source_surface (cr, surface, + -cairo_image_surface_get_width (surface)/2., + -cairo_image_surface_get_height (surface)/2.); + cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_NEAREST); + cairo_paint (cr); + } cairo_restore (cr); + + cairo_set_source_rgb (cr, colour[k][0], colour[k][1], colour[k][2]); + for (j = 4; j <= 6; j++) { + for (i = 4; i <= 6; i++) { + cairo_matrix_init_translate (&m, + -(2*(i-4) + .1*i), + -(2*(j-4) + .1*j)); + cairo_matrix_multiply (&m, &m, &transform[k]); + cairo_pattern_set_matrix (pattern, &m); + cairo_mask (cr, pattern); + } + } + } + + cairo_pattern_destroy (pattern); + cairo_surface_destroy (surface); + + return CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (filter_nearest_transformed, + "Test sample position when drawing transformed images with FILTER_NEAREST", + "filter, nearest", /* keywords */ + NULL, + 14, 14, + NULL, draw) |