diff options
Diffstat (limited to 'libs/cairo-1.16.0/test/mesh-pattern-conical.c')
-rw-r--r-- | libs/cairo-1.16.0/test/mesh-pattern-conical.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/mesh-pattern-conical.c b/libs/cairo-1.16.0/test/mesh-pattern-conical.c new file mode 100644 index 0000000..4e87eec --- /dev/null +++ b/libs/cairo-1.16.0/test/mesh-pattern-conical.c @@ -0,0 +1,135 @@ +/* + * Copyright © 2009 Adrian Johnson + * + * 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: Adrian Johnson <ajohnson@redneon.com> + */ + +#include "cairo-test.h" +#include <math.h> + +#define PAT_WIDTH 100 +#define PAT_HEIGHT 100 +#define SIZE PAT_WIDTH +#define PAD 2 +#define WIDTH (PAD + SIZE + PAD) +#define HEIGHT WIDTH + + +/* + * This test is designed to paint a mesh pattern which contains 8 + * circular sectors approximating a conical gradient. + */ + +#define CENTER_X 50 +#define CENTER_Y 50 +#define RADIUS 50 + +static void +sector_patch (cairo_pattern_t *pattern, + double angle_A, + double A_r, double A_g, double A_b, + double angle_B, + double B_r, double B_g, double B_b) +{ + double r_sin_A, r_cos_A; + double r_sin_B, r_cos_B; + double h; + + r_sin_A = RADIUS * sin (angle_A); + r_cos_A = RADIUS * cos (angle_A); + r_sin_B = RADIUS * sin (angle_B); + r_cos_B = RADIUS * cos (angle_B); + + h = 4.0/3.0 * tan ((angle_B - angle_A) / 4.0); + + cairo_mesh_pattern_begin_patch (pattern); + + cairo_mesh_pattern_move_to (pattern, CENTER_X, CENTER_Y); + cairo_mesh_pattern_line_to (pattern, + CENTER_X + r_cos_A, + CENTER_Y + r_sin_A); + + cairo_mesh_pattern_curve_to (pattern, + CENTER_X + r_cos_A - h * r_sin_A, + CENTER_Y + r_sin_A + h * r_cos_A, + CENTER_X + r_cos_B + h * r_sin_B, + CENTER_Y + r_sin_B - h * r_cos_B, + CENTER_X + r_cos_B, + CENTER_Y + r_sin_B); + + cairo_mesh_pattern_set_corner_color_rgb (pattern, 0, 1, 1, 1); + cairo_mesh_pattern_set_corner_color_rgb (pattern, 1, A_r, A_g, A_b); + cairo_mesh_pattern_set_corner_color_rgb (pattern, 2, B_r, B_g, B_b); + + cairo_mesh_pattern_end_patch (pattern); +} + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + cairo_pattern_t *pattern; + + cairo_set_source_rgb (cr, 1, 1, 1); + cairo_paint (cr); + + cairo_translate (cr, PAD, PAD); + + pattern = cairo_pattern_create_mesh (); + sector_patch (pattern, + 0, 1, 0, 0, + M_PI/4, 1, 1, 0); + sector_patch (pattern, + M_PI/4, 0, 1, 0, + M_PI/2, 0, 1, 1); + sector_patch (pattern, + M_PI/2, 0, 0, 1, + 3*M_PI/4, 1, 0, 1); + sector_patch (pattern, + 3*M_PI/4, 1, 0, 0, + M_PI, 1, 1, 0); + sector_patch (pattern, + -M_PI, 1, 1, 0, + -3*M_PI/4, 0, 1, 0); + sector_patch (pattern, + -3*M_PI/4, 0, 1, 0, + -M_PI/2, 0, 1, 1); + sector_patch (pattern, + -M_PI/2, 0, 1, 1, + -M_PI/4, 0, 0, 1); + sector_patch (pattern, + -M_PI/4, 0, 0, 1, + 0, 1, 0, 0); + + cairo_set_source (cr, pattern); + cairo_paint (cr); + cairo_pattern_destroy (pattern); + + return CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (mesh_pattern_conical, + "Paint a conical pattern using a mesh pattern", + "conical, mesh, pattern", /* keywords */ + NULL, /* requirements */ + WIDTH, HEIGHT, + NULL, draw) |