diff options
Diffstat (limited to 'libs/cairo-1.16.0/test/zero-mask.c')
| -rw-r--r-- | libs/cairo-1.16.0/test/zero-mask.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/zero-mask.c b/libs/cairo-1.16.0/test/zero-mask.c new file mode 100644 index 0000000..3d2f34d --- /dev/null +++ b/libs/cairo-1.16.0/test/zero-mask.c @@ -0,0 +1,198 @@ +/* + * Copyright © 2010 Red Hat, Inc. + * + * 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: Benjamin Otte <otte@gnome.org> + */ + +#include "cairo-test.h" + +#define RECT 10 +#define SPACE 5 + +static void +paint_with_alpha (cairo_t *cr) +{ + cairo_paint_with_alpha (cr, 0.0); +} + +static void +mask_with_solid (cairo_t *cr) +{ + cairo_pattern_t *pattern = cairo_pattern_create_rgba (1, 0, 0, 0); + + cairo_mask (cr, pattern); + + cairo_pattern_destroy (pattern); +} + +static void +mask_with_empty_gradient (cairo_t *cr) +{ + cairo_pattern_t *pattern = cairo_pattern_create_linear (1, 2, 3, 4); + + cairo_mask (cr, pattern); + + cairo_pattern_destroy (pattern); +} + +static void +mask_with_gradient (cairo_t *cr) +{ + cairo_pattern_t *pattern = cairo_pattern_create_radial (1, 2, 3, 4, 5, 6); + + cairo_pattern_add_color_stop_rgba (pattern, 0, 1, 0, 0, 0); + cairo_pattern_add_color_stop_rgba (pattern, 0, 0, 0, 1, 0); + + cairo_mask (cr, pattern); + + cairo_pattern_destroy (pattern); +} + +static void +mask_with_surface (cairo_t *cr) +{ + cairo_surface_t *surface = cairo_surface_create_similar (cairo_get_target (cr), + CAIRO_CONTENT_COLOR_ALPHA, + RECT, + RECT); + + cairo_mask_surface (cr, surface, 0, 0); + + cairo_surface_destroy (surface); +} + +static void +mask_with_alpha_surface (cairo_t *cr) +{ + cairo_surface_t *surface = cairo_surface_create_similar (cairo_get_target (cr), + CAIRO_CONTENT_ALPHA, + RECT / 2, + RECT / 2); + cairo_pattern_t *pattern = cairo_pattern_create_for_surface (surface); + cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REFLECT); + + cairo_mask (cr, pattern); + + cairo_pattern_destroy (pattern); + cairo_surface_destroy (surface); +} + +static void +mask_with_nonclear_surface (cairo_t *cr) +{ + static unsigned char data[8 * 4] = { 0, }; + cairo_surface_t *surface = cairo_image_surface_create_for_data (data, + CAIRO_FORMAT_A1, + 16, 8, 4); + + cairo_mask_surface (cr, surface, 0, 0); + + cairo_surface_destroy (surface); +} + +static void +mask_with_0x0_surface (cairo_t *cr) +{ + cairo_surface_t *surface = cairo_surface_create_similar (cairo_get_target (cr), + CAIRO_CONTENT_COLOR_ALPHA, + 0, 0); + + cairo_mask_surface (cr, surface, 0, 0); + + cairo_surface_destroy (surface); +} + +static void +mask_with_extend_none (cairo_t *cr) +{ + cairo_surface_t *surface = cairo_surface_create_similar (cairo_get_target (cr), + CAIRO_CONTENT_COLOR_ALPHA, + RECT, + RECT); + + cairo_mask_surface (cr, surface, 2 * RECT, 2 * RECT); + + cairo_surface_destroy (surface); +} + +typedef void (* mask_func_t) (cairo_t *); + +static mask_func_t mask_funcs[] = { + paint_with_alpha, + mask_with_solid, + mask_with_empty_gradient, + mask_with_gradient, + mask_with_surface, + mask_with_alpha_surface, + mask_with_nonclear_surface, + mask_with_0x0_surface, + mask_with_extend_none +}; + +static cairo_operator_t operators[] = { + CAIRO_OPERATOR_CLEAR, + CAIRO_OPERATOR_SOURCE, + CAIRO_OPERATOR_OVER, + CAIRO_OPERATOR_IN, + CAIRO_OPERATOR_DEST_ATOP, + CAIRO_OPERATOR_SATURATE, + CAIRO_OPERATOR_MULTIPLY +}; + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + unsigned int i, op; + + /* 565-compatible gray background */ + cairo_set_source_rgb (cr, 0.51613, 0.55555, 0.51613); + cairo_paint (cr); + + cairo_set_source_rgb (cr, 0.0, 1.0, 0.0); /* green */ + /* mask with zero-alpha in several ways */ + + cairo_translate (cr, SPACE, SPACE); + + for (op = 0; op < ARRAY_LENGTH (operators); op++) { + cairo_set_operator (cr, operators[op]); + + for (i = 0; i < ARRAY_LENGTH (mask_funcs); i++) { + cairo_save (cr); + cairo_translate (cr, i * (RECT + SPACE), op * (RECT + SPACE)); + cairo_rectangle (cr, 0, 0, RECT, RECT); + cairo_clip (cr); + mask_funcs[i] (cr); + cairo_restore (cr); + } + } + + return CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (zero_mask, + "Testing that masking with zero alpha works", + "alpha, mask", /* keywords */ + NULL, /* requirements */ + SPACE + (RECT + SPACE) * ARRAY_LENGTH (mask_funcs), + SPACE + (RECT + SPACE) * ARRAY_LENGTH (operators), + NULL, draw) |