| /* |
| * Copyright © 2005 Red Hat, Inc. |
| * |
| * Permission to use, copy, modify, distribute, and sell this software |
| * and its documentation for any purpose is hereby granted without |
| * fee, provided that the above copyright notice appear in all copies |
| * and that both that copyright notice and this permission notice |
| * appear in supporting documentation, and that the name of |
| * Red Hat, Inc. not be used in advertising or publicity pertaining to |
| * distribution of the software without specific, written prior |
| * permission. Red Hat, Inc. makes no representations about the |
| * suitability of this software for any purpose. It is provided "as |
| * is" without express or implied warranty. |
| * |
| * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS |
| * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL, |
| * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER |
| * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR |
| * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| * |
| * Author: Owen Taylor <otaylor@redhat.com> |
| */ |
| |
| #include "cairo-test.h" |
| #include "stdio.h" |
| |
| /* The test matrix is |
| * |
| * A) Horizontal B) 5° C) 45° D) Vertical |
| * 1) Rotated 0° 2) Rotated 45° C) Rotated 90° |
| * a) 2 stop b) 3 stop |
| * |
| * A1a B1a C1a D1a |
| * A2a B2a C2a D2a |
| * A3a B3a C3a D3a |
| * A1b B1b C1b D1b |
| * A2b B2b C2b D2b |
| * A3b B3b C3b D3b |
| */ |
| |
| static const double gradient_angles[] = { 0, 45, 90 }; |
| #define N_GRADIENT_ANGLES 3 |
| static const double rotate_angles[] = { 0, 45, 90 }; |
| #define N_ROTATE_ANGLES 3 |
| static const int n_stops[] = { 2, 3 }; |
| #define N_N_STOPS 2 |
| |
| #define UNIT_SIZE 6 |
| #define UNIT_SIZE 6 |
| #define PAD 1 |
| |
| #define WIDTH N_GRADIENT_ANGLES * UNIT_SIZE + (N_GRADIENT_ANGLES + 1) * PAD |
| #define HEIGHT N_N_STOPS * N_ROTATE_ANGLES * UNIT_SIZE + (N_N_STOPS * N_ROTATE_ANGLES + 1) * PAD |
| |
| static void |
| draw_unit (cairo_t *cr, |
| double gradient_angle, |
| double rotate_angle, |
| int n_stops) |
| { |
| cairo_pattern_t *pattern; |
| |
| cairo_rectangle (cr, 0, 0, 1, 1); |
| cairo_clip (cr); |
| cairo_new_path(cr); |
| |
| cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); |
| cairo_rectangle (cr, 0, 0, 1, 1); |
| cairo_fill (cr); |
| |
| cairo_translate (cr, 0.5, 0.5); |
| cairo_scale (cr, 1 / 1.5, 1 / 1.5); |
| cairo_rotate (cr, rotate_angle); |
| |
| pattern = cairo_pattern_create_linear (-0.5 * cos (gradient_angle), -0.5 * sin (gradient_angle), |
| 0.5 * cos (gradient_angle), 0.5 * sin (gradient_angle)); |
| |
| if (n_stops == 2) { |
| cairo_pattern_add_color_stop_rgb (pattern, 0., |
| 0.3, 0.3, 0.3); |
| cairo_pattern_add_color_stop_rgb (pattern, 1., |
| 1.0, 1.0, 1.0); |
| } else { |
| cairo_pattern_add_color_stop_rgb (pattern, 0., |
| 1.0, 0.0, 0.0); |
| cairo_pattern_add_color_stop_rgb (pattern, 0.5, |
| 1.0, 1.0, 1.0); |
| cairo_pattern_add_color_stop_rgb (pattern, 1., |
| 0.0, 0.0, 1.0); |
| } |
| |
| cairo_set_source (cr, pattern); |
| cairo_pattern_destroy (pattern); |
| cairo_rectangle (cr, -0.5, -0.5, 1, 1); |
| cairo_fill (cr); |
| } |
| |
| static cairo_test_status_t |
| draw (cairo_t *cr, int width, int height) |
| { |
| int i, j, k; |
| |
| cairo_set_source_rgb (cr, 0.5, 0.5, 0.5); |
| cairo_paint (cr); |
| |
| for (i = 0; i < N_GRADIENT_ANGLES; i++) |
| for (j = 0; j < N_ROTATE_ANGLES; j++) |
| for (k = 0; k < N_N_STOPS; k++) { |
| cairo_save (cr); |
| cairo_translate (cr, |
| PAD + (PAD + UNIT_SIZE) * i, |
| PAD + (PAD + UNIT_SIZE) * (N_ROTATE_ANGLES * k + j)); |
| cairo_scale (cr, UNIT_SIZE, UNIT_SIZE); |
| |
| draw_unit (cr, |
| gradient_angles[i] * M_PI / 180., |
| rotate_angles[j] * M_PI / 180., |
| n_stops[k]); |
| cairo_restore (cr); |
| } |
| |
| return CAIRO_TEST_SUCCESS; |
| } |
| |
| CAIRO_TEST (linear_gradient, |
| "Tests the drawing of linear gradients", |
| "gradient", /* keywords */ |
| NULL, /* requirements */ |
| WIDTH, HEIGHT, |
| NULL, draw) |