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Diffstat (limited to 'test/hatchings.c')
| -rw-r--r-- | test/hatchings.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/test/hatchings.c b/test/hatchings.c new file mode 100644 index 000000000..ca3f2c6af --- /dev/null +++ b/test/hatchings.c @@ -0,0 +1,153 @@ +/* + * Copyright © 2011 Intel Corporation + * + * 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" + +#define STEP 5 +#define WIDTH 100 +#define HEIGHT 100 + +static void hatching (cairo_t *cr) +{ + int i; + + cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT); + cairo_clip (cr); + + for (i = 0; i < WIDTH; i += STEP) { + cairo_rectangle (cr, i-1, -2, 2, HEIGHT+4); + cairo_rectangle (cr, -2, i-1, WIDTH+4, 2); + } +} + +static void background (cairo_t *cr) +{ + cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); + cairo_set_source_rgb (cr, 1,1,1); + cairo_paint (cr); +} + +static void clip_to_quadrant (cairo_t *cr) +{ + cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT); + cairo_clip (cr); +} + +static void draw_hatching (cairo_t *cr, void (*func) (cairo_t *)) +{ + cairo_save (cr); { + clip_to_quadrant (cr); + hatching (cr); + func (cr); + } cairo_restore (cr); + + cairo_translate (cr, WIDTH, 0); + + cairo_save (cr); { + clip_to_quadrant (cr); + cairo_translate (cr, 0.25, 0.25); + hatching (cr); + func (cr); + } cairo_restore (cr); + + cairo_translate (cr, WIDTH, 0); + + cairo_save (cr); { + clip_to_quadrant (cr); + cairo_translate (cr, WIDTH/2, HEIGHT/2); + cairo_rotate (cr, M_PI/4); + cairo_translate (cr, -WIDTH/2, -HEIGHT/2); + hatching (cr); + func (cr); + } cairo_restore (cr); + + cairo_translate (cr, WIDTH, 0); +} + +static void do_clip (cairo_t *cr) +{ + cairo_clip (cr); + cairo_paint (cr); +} + +static void do_clip_alpha (cairo_t *cr) +{ + cairo_clip (cr); + cairo_paint_with_alpha (cr, .5); +} + +static void hatchings (cairo_t *cr, void (*func) (cairo_t *)) +{ + cairo_save (cr); { + cairo_set_source_rgb(cr, 1, 0, 0); + cairo_set_antialias (cr, CAIRO_ANTIALIAS_DEFAULT); + draw_hatching (cr, func); + cairo_set_source_rgb(cr, 0, 0, 1); + cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE); + draw_hatching (cr, func); + } cairo_restore (cr); +} + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + background (cr); + + + /* aligned, misaligned, diagonal; mono repeat + * x fill + * x clip; paint + * x clip; paint-alpha + * repeated, for over/source + */ + + cairo_set_operator (cr, CAIRO_OPERATOR_OVER); + + hatchings (cr, cairo_fill); + cairo_translate (cr, 0, HEIGHT); + hatchings (cr, do_clip); + cairo_translate (cr, 0, HEIGHT); + hatchings (cr, do_clip_alpha); + cairo_translate (cr, 0, HEIGHT); + + cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); + + hatchings (cr, cairo_fill); + cairo_translate (cr, 0, HEIGHT); + hatchings (cr, do_clip); + cairo_translate (cr, 0, HEIGHT); + hatchings (cr, do_clip_alpha); + cairo_translate (cr, 0, HEIGHT); + + return CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (hatchings, + "Test drawing through various aligned/unaliged clips", + "clip, alpha", /* keywords */ + "target=raster", /* requirements */ + 6*WIDTH, 6*HEIGHT, + NULL, draw) |