/* * Copyright © 2006 Mozilla Corporation * * Permission to use, copy, modify, distribute, and sell this software * and its documentation for any purpose is hereby granted without * fee, provided that the above copyright notice appear in all copies * and that both that copyright notice and this permission notice * appear in supporting documentation, and that the name of * Mozilla Corporation not be used in advertising or publicity pertaining to * distribution of the software without specific, written prior * permission. Mozilla Corporation makes no representations about the * suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * MOZILLA CORPORATION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS, IN NO EVENT SHALL MOZILLA CORPORATION BE LIABLE FOR ANY SPECIAL, * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * * Author: Vladimir Vukicevic */ #include "cairo-test.h" static cairo_test_draw_function_t draw; #define SRC_WIDTH 2048 #define SRC_HEIGHT 32 cairo_test_t test = { "surface-pattern-big-scale-down", "Test scaled-down transformed not-repeated surface patterns with large images and offsets", 512, 16, draw }; static void setup_source_surface (cairo_surface_t *surface, int w, int h) { cairo_t *cr = cairo_create (surface); cairo_set_source_rgb (cr, 1.0, 0.0, 0.0); cairo_rectangle (cr, 0, 0, w/2, h/2); cairo_fill (cr); cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); cairo_rectangle (cr, w/2, 0, w/2, h/2); cairo_fill (cr); cairo_set_source_rgb (cr, 0.0, 0.0, 1.0); cairo_rectangle (cr, 0, h/2, w/2, h/2); cairo_fill (cr); cairo_set_source_rgb (cr, 1.0, 1.0, 0.0); cairo_rectangle (cr, w/2, h/2, w/2, h/2); cairo_fill (cr); cairo_destroy (cr); } static void draw_n (cairo_t *cr, cairo_pattern_t *pat, double dest_size, int n) { cairo_matrix_t mat; cairo_matrix_init_scale (&mat, SRC_WIDTH / dest_size, SRC_HEIGHT / dest_size); cairo_matrix_translate (&mat, n * -dest_size, 0.0); cairo_pattern_set_matrix (pat, &mat); cairo_set_source (cr, pat); cairo_new_path (cr); cairo_rectangle (cr, n * dest_size, 0.0, dest_size, dest_size); cairo_fill (cr); } static cairo_test_status_t draw (cairo_t *cr, int width, int height) { cairo_surface_t *surface; cairo_pattern_t *pat; int n; cairo_set_source_rgb (cr, 0, 0, 0); cairo_paint (cr); surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, SRC_WIDTH, SRC_HEIGHT); setup_source_surface (surface, SRC_WIDTH, SRC_HEIGHT); pat = cairo_pattern_create_for_surface (surface); /* We want to draw at a position such that n * SRC_WIDTH * (SRC_WIDTH/16.0) > 32768. * x = n * 16. * * To show the bug, we want to draw on either side of the boundary; * in our case here, n = 16 results in 32768, and n = 17 results in > 32768. * * Drawing at 16 and 17 is sufficient to show the problem. */ #if 1 /* n = 16 */ draw_n (cr, pat, 16.0, 16); /* n = 17 */ draw_n (cr, pat, 16.0, 17); #else for (n = 0; n < 32; n++) draw_n (cr, pat, 16.0, n); #endif return CAIRO_TEST_SUCCESS; } int main (void) { return cairo_test (&test); }