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Diffstat (limited to 'test/scale-offset-image.c')
| -rw-r--r-- | test/scale-offset-image.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/test/scale-offset-image.c b/test/scale-offset-image.c new file mode 100644 index 000000000..7243a0669 --- /dev/null +++ b/test/scale-offset-image.c @@ -0,0 +1,143 @@ +/* + * Copyright 2008 Chris Wilson + * + * 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 + * Chris Wilson not be used in advertising or publicity pertaining to + * distribution of the software without specific, written prior + * permission. Chris Wilson makes no representations about the + * suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS + * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS, IN NO EVENT SHALL CHRIS WILSON 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: Chris Wilson <chris@chris-wilson.co.uk> + */ + +/* + * Test case derived from the bug report by Michel Iwaniec: + * http://lists.cairographics.org/archives/cairo/2008-November/015660.html + */ + +#include "cairo-test.h" + +static cairo_surface_t * +create_source (cairo_surface_t *target, int width, int height) +{ + cairo_surface_t *similar; + cairo_t *cr; + + similar = cairo_image_surface_create (CAIRO_FORMAT_RGB24, + width, height); + cr = cairo_create (similar); + cairo_surface_destroy (similar); + + cairo_set_source_rgb (cr, 1, 1, 1); + cairo_rectangle (cr, + width - 4, height - 4, + 2, 2); + cairo_fill (cr); + cairo_set_source_rgb (cr, 1, 0, 0); + cairo_rectangle (cr, + width - 2, height - 4, + 2, 2); + cairo_fill (cr); + cairo_set_source_rgb (cr, 0, 1, 0); + cairo_rectangle (cr, + width - 4, height - 2, + 2, 2); + cairo_fill (cr); + cairo_set_source_rgb (cr, 0, 0, 1); + cairo_rectangle (cr, + width - 2, height - 2, + 2, 2); + cairo_fill (cr); + + similar = cairo_surface_reference (cairo_get_target (cr)); + cairo_destroy (cr); + + return similar; +} + +static void +draw_grid (cairo_t *cr, cairo_pattern_t *pattern, int dst_x, int dst_y) +{ + cairo_matrix_t m; + + cairo_save (cr); + cairo_translate (cr, dst_x, dst_y); + cairo_scale (cr, 16, 16); + cairo_rotate (cr, 1); + + cairo_matrix_init_translate (&m, 2560-4, 1280-4); + cairo_pattern_set_matrix (pattern, &m); + cairo_set_source (cr, pattern); + cairo_rectangle (cr, 0, 0, 4, 4); + cairo_fill (cr); + + cairo_set_source_rgb (cr, .7, .7, .7); + cairo_set_line_width (cr, 1./16); + cairo_move_to (cr, 0, 0); + cairo_line_to (cr, 4, 0); + cairo_move_to (cr, 0, 2); + cairo_line_to (cr, 4, 2); + cairo_move_to (cr, 0, 4); + cairo_line_to (cr, 4, 4); + cairo_move_to (cr, 0, 0); + cairo_line_to (cr, 0, 4); + cairo_move_to (cr, 2, 0); + cairo_line_to (cr, 2, 4); + cairo_move_to (cr, 4, 0); + cairo_line_to (cr, 4, 4); + cairo_stroke (cr); + + cairo_restore (cr); +} + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + cairo_surface_t *source; + cairo_pattern_t *pattern; + + cairo_paint (cr); + + source = create_source (cairo_get_target (cr), 2560, 1280); + pattern = cairo_pattern_create_for_surface (source); + cairo_surface_destroy (source); + + cairo_pattern_set_filter (pattern, CAIRO_FILTER_NEAREST); + cairo_pattern_set_extend (pattern, CAIRO_EXTEND_NONE); + + draw_grid (cr, pattern, 50, 0); + draw_grid (cr, pattern, 130, 0); + draw_grid (cr, pattern, 210, 0); + draw_grid (cr, pattern, 290, 0); + + draw_grid (cr, pattern, 50, 230); + draw_grid (cr, pattern, 130, 230); + draw_grid (cr, pattern, 210, 230); + draw_grid (cr, pattern, 290, 230); + + cairo_pattern_destroy (pattern); + + return CAIRO_TEST_SUCCESS; +} + +/* XFAIL: loss of precision converting a cairo matrix to */ +CAIRO_TEST (scale_offset_image, + "Tests drawing surfaces under various scales and transforms", + "surface, scale-offset", /* keywords */ + NULL, /* requirements */ + 320, 320, + NULL, draw) + |