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893239248a
Some tests were using source surfaces created as ARGB32 even though all alpha values are entirely opaque. This meant these tests were triggering more fallbacks than strictly necessary for what the tests are ttrying to do.
107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
/*
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* Copyright © 2005 Red Hat, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without
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* fee, provided that the above copyright notice appear in all copies
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* and that both that copyright notice and this permission notice
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* appear in supporting documentation, and that the name of
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* Red Hat, Inc. not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior
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* permission. Red Hat, Inc. makes no representations about the
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* suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
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* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: Carl D. Worth <cworth@cworth.org>
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*/
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#include "cairo-test.h"
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#define STAMP_WIDTH 4
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#define STAMP_HEIGHT 4
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#define PAD 1
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#define STEPS 10
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#define IMAGE_WIDTH (PAD + STEPS * (STAMP_WIDTH + PAD) + PAD)
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#define IMAGE_HEIGHT (PAD + STEPS * (STAMP_HEIGHT + PAD) + PAD)
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cairo_test_t test = {
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"filter-nearest-offset",
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"Test sampling offset of CAIRO_FILTER_NEAREST",
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IMAGE_WIDTH, IMAGE_HEIGHT
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};
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static cairo_test_status_t
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draw (cairo_t *cr, int width, int height)
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{
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cairo_surface_t *surface;
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static uint32_t data[STAMP_WIDTH * STAMP_HEIGHT] = {
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0xffffffff, 0xffffffff, 0xffff0000, 0xffff0000,
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0xffffffff, 0xffffffff, 0xffff0000, 0xffff0000,
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0xff00ff00, 0xff00ff00, 0xff0000ff, 0xff0000ff,
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0xff00ff00, 0xff00ff00, 0xff0000ff, 0xff0000ff
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};
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int i, j;
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/* Draw reference lines where the jump should be. */
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cairo_move_to (cr, PAD + STEPS / 2 * (STAMP_WIDTH + PAD), 0);
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cairo_rel_line_to (cr, 0, IMAGE_HEIGHT);
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cairo_move_to (cr, 0, PAD + STEPS / 2 * (STAMP_HEIGHT + PAD));
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cairo_rel_line_to (cr, IMAGE_WIDTH, 0);
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cairo_set_line_width (cr, 2.0);
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cairo_stroke (cr);
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surface = cairo_image_surface_create_for_data ((unsigned char *) data,
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CAIRO_FORMAT_RGB24,
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STAMP_WIDTH,
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STAMP_HEIGHT,
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STAMP_WIDTH * 4);
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for (j=0; j < STEPS; j++) {
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double j_step;
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for (i=0; i < STEPS; i++) {
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double i_step;
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#define GENERATE_REFERENCE_IMAGE 0
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#if GENERATE_REFERENCE_IMAGE
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i_step = i >= STEPS / 2 ? 1 : 0;
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j_step = j >= STEPS / 2 ? 1 : 0;
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#else
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i_step = i * 1.0 / STEPS;
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j_step = j * 1.0 / STEPS;
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#endif
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cairo_save (cr);
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cairo_set_source_surface (cr, surface,
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PAD + i * (STAMP_WIDTH + PAD) + i_step,
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PAD + j * (STAMP_HEIGHT + PAD) + j_step);
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cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_NEAREST);
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cairo_paint (cr);
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cairo_restore (cr);
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}
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}
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cairo_surface_destroy (surface);
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return CAIRO_TEST_SUCCESS;
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}
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int
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main (void)
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{
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return cairo_test_expect_failure (&test, draw,
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"wrong sampling location for nearest-neighbor filter in libpixman and Render");
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}
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