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/*
* 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)
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