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Diffstat (limited to 'libs/cairo-1.16.0/test/radial-gradient.c')
| -rw-r--r-- | libs/cairo-1.16.0/test/radial-gradient.c | 256 |
1 files changed, 0 insertions, 256 deletions
diff --git a/libs/cairo-1.16.0/test/radial-gradient.c b/libs/cairo-1.16.0/test/radial-gradient.c deleted file mode 100644 index 026876b..0000000 --- a/libs/cairo-1.16.0/test/radial-gradient.c +++ /dev/null @@ -1,256 +0,0 @@ -/* - * Copyright © 2005, 2007 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: Carl D. Worth <cworth@cworth.org> - */ - -#include "cairo-test.h" - -#define NUM_GRADIENTS 7 -#define NUM_EXTEND 4 -#define SIZE 120 -#define WIDTH (SIZE * NUM_GRADIENTS) -#define HEIGHT (SIZE * NUM_EXTEND) - -typedef void (*composite_t)(cairo_t *cr, cairo_pattern_t *pattern); -typedef void (*add_stops_t)(cairo_pattern_t *pattern); - -/* - * We want to test all the possible relative positions of the start - * and end circle: - * - * - The start circle can be smaller/equal/bigger than the end - * circle. A radial gradient can be classified in one of these - * three cases depending on the sign of dr. - * - * - The smaller circle can be completely inside/internally - * tangent/outside (at least in part) of the bigger circle. This - * classification is the same as the one which can be computed by - * examining the sign of a = (dx^2 + dy^2 - dr^2). - * - * - If the two circles have the same size, neither can be inside or - * internally tangent - * - * This test draws radial gradients whose circles always have the same - * centers (0, 0) and (1, 0), but with different radiuses. From left - * to right: - * - * - Small start circle completely inside the end circle - * 0.25 -> 1.75; dr = 1.5 > 0; a = 1 - 1.50^2 < 0 - * - * - Small start circle internally tangent to the end circle - * 0.50 -> 1.50; dr = 1.0 > 0; a = 1 - 1.00^2 = 0 - * - * - Small start circle outside of the end circle - * 0.50 -> 1.00; dr = 0.5 > 0; a = 1 - 0.50^2 > 0 - * - * - Start circle with the same size as the end circle - * 1.00 -> 1.00; dr = 0.0 = 0; a = 1 - 0.00^2 > 0 - * - * - Small end circle outside of the start circle - * 1.00 -> 0.50; dr = -0.5 > 0; a = 1 - 0.50^2 > 0 - * - * - Small end circle internally tangent to the start circle - * 1.50 -> 0.50; dr = -1.0 > 0; a = 1 - 1.00^2 = 0 - * - * - Small end circle completely inside the start circle - * 1.75 -> 0.25; dr = -1.5 > 0; a = 1 - 1.50^2 < 0 - * - */ - -static const double radiuses[NUM_GRADIENTS] = { - 0.25, - 0.50, - 0.50, - 1.00, - 1.00, - 1.50, - 1.75 -}; - -static cairo_pattern_t * -create_pattern (int index) -{ - double x0, x1, radius0, radius1, left, right, center; - - x0 = 0; - x1 = 1; - radius0 = radiuses[index]; - radius1 = radiuses[NUM_GRADIENTS - index - 1]; - - /* center the gradient */ - left = MIN (x0 - radius0, x1 - radius1); - right = MAX (x0 + radius0, x1 + radius1); - center = (left + right) * 0.5; - x0 -= center; - x1 -= center; - - /* scale to make it fit within a 1x1 rect centered in (0,0) */ - x0 *= 0.25; - x1 *= 0.25; - radius0 *= 0.25; - radius1 *= 0.25; - - return cairo_pattern_create_radial (x0, 0, radius0, x1, 0, radius1); -} - -static void -pattern_add_stops (cairo_pattern_t *pattern) -{ - cairo_pattern_add_color_stop_rgba (pattern, 0.0, 1, 0, 0, 0.75); - cairo_pattern_add_color_stop_rgba (pattern, sqrt (0.5), 0, 1, 0, 0); - cairo_pattern_add_color_stop_rgba (pattern, 1.0, 0, 0, 1, 1); -} - -static void -pattern_add_single_stop (cairo_pattern_t *pattern) -{ - cairo_pattern_add_color_stop_rgba (pattern, 0.25, 1, 0, 0, 1); -} - - -static cairo_test_status_t -draw (cairo_t *cr, add_stops_t add_stops, composite_t composite) -{ - int i, j; - cairo_extend_t extend[NUM_EXTEND] = { - CAIRO_EXTEND_NONE, - CAIRO_EXTEND_REPEAT, - CAIRO_EXTEND_REFLECT, - CAIRO_EXTEND_PAD - }; - - cairo_scale (cr, SIZE, SIZE); - cairo_translate (cr, 0.5, 0.5); - - for (j = 0; j < NUM_EXTEND; j++) { - cairo_save (cr); - for (i = 0; i < NUM_GRADIENTS; i++) { - cairo_pattern_t *pattern; - - pattern = create_pattern (i); - add_stops (pattern); - cairo_pattern_set_extend (pattern, extend[j]); - - cairo_save (cr); - cairo_rectangle (cr, -0.5, -0.5, 1, 1); - cairo_clip (cr); - composite (cr, pattern); - cairo_restore (cr); - cairo_pattern_destroy (pattern); - - cairo_translate (cr, 1, 0); - } - cairo_restore (cr); - cairo_translate (cr, 0, 1); - } - - return CAIRO_TEST_SUCCESS; -} - - -static void -composite_simple (cairo_t *cr, cairo_pattern_t *pattern) -{ - cairo_set_source (cr, pattern); - cairo_paint (cr); -} - -static void -composite_mask (cairo_t *cr, cairo_pattern_t *pattern) -{ - cairo_set_source_rgb (cr, 1, 0, 1); - cairo_mask (cr, pattern); -} - - -static cairo_test_status_t -draw_simple (cairo_t *cr, int width, int height) -{ - cairo_test_paint_checkered (cr); - return draw (cr, pattern_add_stops, composite_simple); -} - -static cairo_test_status_t -draw_mask (cairo_t *cr, int width, int height) -{ - cairo_test_paint_checkered (cr); - return draw (cr, pattern_add_stops, composite_mask); -} - -static cairo_test_status_t -draw_source (cairo_t *cr, int width, int height) -{ - cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); - return draw (cr, pattern_add_stops, composite_simple); -} - - -static cairo_test_status_t -draw_mask_source (cairo_t *cr, int width, int height) -{ - cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); - return draw (cr, pattern_add_stops, composite_mask); -} - -static cairo_test_status_t -draw_one_stop (cairo_t *cr, int width, int height) -{ - cairo_test_paint_checkered (cr); - return draw (cr, pattern_add_single_stop, composite_simple); -} - -CAIRO_TEST (radial_gradient, - "Simple test of radial gradients", - "gradient", /* keywords */ - NULL, /* requirements */ - WIDTH, HEIGHT, - NULL, draw_simple) - -CAIRO_TEST (radial_gradient_mask, - "Simple test of radial gradients using a MASK", - "gradient,mask", /* keywords */ - NULL, /* requirements */ - WIDTH, HEIGHT, - NULL, draw_mask) - -CAIRO_TEST (radial_gradient_source, - "Simple test of radial gradients using the SOURCE operator", - "gradient,source", /* keywords */ - NULL, /* requirements */ - WIDTH, HEIGHT, - NULL, draw_source) - -CAIRO_TEST (radial_gradient_mask_source, - "Simple test of radial gradients using a MASK with a SOURCE operator", - "gradient,mask,source", /* keywords */ - NULL, /* requirements */ - WIDTH, HEIGHT, - NULL, draw_mask_source) - -CAIRO_TEST (radial_gradient_one_stop, - "Tests radial gradients with a single stop", - "gradient,radial", /* keywords */ - NULL, /* requirements */ - WIDTH, HEIGHT, - NULL, draw_one_stop) |