blob: 89f4c3cc2ac0f8009a8c956a3917e194943d517e [file] [log] [blame]
/*
* 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.
*
* Authors: Owen Taylor <otaylor@redhat.com>
* Kristian Høgsberg <krh@redhat.com>
*/
#include "cairo-test.h"
#include <math.h>
#include <stdio.h>
#define WIDTH 16
#define HEIGHT 16
#define PAD 2
static const char *png_filename = "romedalen.png";
static cairo_surface_t *image;
static void
set_solid_pattern (const cairo_test_context_t *ctx, cairo_t *cr, int x, int y)
{
cairo_set_source_rgb (cr, 0, 0, 0.6);
}
static void
set_translucent_pattern (const cairo_test_context_t *ctx, cairo_t *cr, int x, int y)
{
cairo_set_source_rgba (cr, 0, 0, 0.6, 0.5);
}
static void
set_gradient_pattern (const cairo_test_context_t *ctx, cairo_t *cr, int x, int y)
{
cairo_pattern_t *pattern;
pattern =
cairo_pattern_create_linear (x, y, x + WIDTH, y + HEIGHT);
cairo_pattern_add_color_stop_rgba (pattern, 0, 1, 1, 1, 1);
cairo_pattern_add_color_stop_rgba (pattern, 1, 0, 0, 0.4, 1);
cairo_set_source (cr, pattern);
cairo_pattern_destroy (pattern);
}
static void
set_image_pattern (const cairo_test_context_t *ctx, cairo_t *cr, int x, int y)
{
cairo_pattern_t *pattern;
if (image == NULL || cairo_surface_status (image)) {
cairo_surface_destroy (image);
image = cairo_test_create_surface_from_png (ctx, png_filename);
}
pattern = cairo_pattern_create_for_surface (image);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
cairo_set_source (cr, pattern);
cairo_pattern_destroy (pattern);
}
static void
mask_polygon (cairo_t *cr, int x, int y)
{
cairo_surface_t *mask_surface;
cairo_t *cr2;
mask_surface = cairo_surface_create_similar (cairo_get_group_target (cr),
CAIRO_CONTENT_ALPHA,
WIDTH, HEIGHT);
cr2 = cairo_create (mask_surface);
cairo_surface_destroy (mask_surface);
cairo_save (cr2);
cairo_set_operator (cr2, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr2);
cairo_restore (cr2);
cairo_set_source_rgb (cr2, 1, 1, 1); /* white */
cairo_new_path (cr2);
cairo_move_to (cr2, 0, 0);
cairo_line_to (cr2, 0, HEIGHT);
cairo_line_to (cr2, WIDTH / 2, 3 * HEIGHT / 4);
cairo_line_to (cr2, WIDTH, HEIGHT);
cairo_line_to (cr2, WIDTH, 0);
cairo_line_to (cr2, WIDTH / 2, HEIGHT / 4);
cairo_close_path (cr2);
cairo_fill (cr2);
cairo_mask_surface (cr, cairo_get_target (cr2), x, y);
cairo_destroy (cr2);
}
static void
mask_alpha (cairo_t *cr, int x, int y)
{
cairo_paint_with_alpha (cr, 0.75);
}
static void
mask_gradient (cairo_t *cr, int x, int y)
{
cairo_pattern_t *pattern;
pattern = cairo_pattern_create_linear (x, y,
x + WIDTH, y + HEIGHT);
cairo_pattern_add_color_stop_rgba (pattern,
0,
1, 1, 1, 1);
cairo_pattern_add_color_stop_rgba (pattern,
1,
1, 1, 1, 0);
cairo_mask (cr, pattern);
cairo_pattern_destroy (pattern);
}
static void
clip_none (cairo_t *cr, int x, int y)
{
}
static void
clip_rects (cairo_t *cr, int x, int y)
{
int height = HEIGHT / 3;
cairo_new_path (cr);
cairo_rectangle (cr, x, y, WIDTH, height);
cairo_rectangle (cr, x, y + 2 * height, WIDTH, height);
cairo_clip (cr);
}
static void
clip_circle (cairo_t *cr, int x, int y)
{
cairo_new_path (cr);
cairo_arc (cr, x + WIDTH / 2, y + HEIGHT / 2,
WIDTH / 2, 0, 2 * M_PI);
cairo_clip (cr);
cairo_new_path (cr);
}
static void (* const pattern_funcs[])(const cairo_test_context_t *ctx, cairo_t *cr, int x, int y) = {
set_solid_pattern,
set_translucent_pattern,
set_gradient_pattern,
set_image_pattern,
};
static void (* const mask_funcs[])(cairo_t *cr, int x, int y) = {
mask_alpha,
mask_gradient,
mask_polygon,
};
static void (* const clip_funcs[])(cairo_t *cr, int x, int y) = {
clip_none,
clip_rects,
clip_circle,
};
#define IMAGE_WIDTH (ARRAY_LENGTH (pattern_funcs) * (WIDTH + PAD) + PAD)
#define IMAGE_HEIGHT (ARRAY_LENGTH (mask_funcs) * ARRAY_LENGTH (clip_funcs) * (HEIGHT + PAD) + PAD)
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
const cairo_test_context_t *ctx = cairo_test_get_context (cr);
cairo_surface_t *tmp_surface;
size_t i, j, k;
cairo_t *cr2;
/* Some of our drawing is unbounded, so we draw each test to
* a temporary surface and copy over.
*/
tmp_surface = cairo_surface_create_similar (cairo_get_group_target (cr),
CAIRO_CONTENT_COLOR_ALPHA,
IMAGE_WIDTH, IMAGE_HEIGHT);
cr2 = cairo_create (tmp_surface);
cairo_surface_destroy (tmp_surface);
for (k = 0; k < ARRAY_LENGTH (clip_funcs); k++) {
for (j = 0; j < ARRAY_LENGTH (mask_funcs); j++) {
for (i = 0; i < ARRAY_LENGTH (pattern_funcs); i++) {
int x = i * (WIDTH + PAD) + PAD;
int y = (ARRAY_LENGTH (mask_funcs) * k + j) * (HEIGHT + PAD) + PAD;
/* Clear intermediate surface we are going to be drawing onto */
cairo_save (cr2);
cairo_set_operator (cr2, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr2);
cairo_restore (cr2);
/* draw */
cairo_save (cr2);
clip_funcs[k] (cr2, x, y);
pattern_funcs[i] (ctx, cr2, x, y);
mask_funcs[j] (cr2, x, y);
cairo_restore (cr2);
/* Copy back to the main pixmap */
cairo_set_source_surface (cr, cairo_get_target (cr2), 0, 0);
cairo_rectangle (cr, x, y, WIDTH, HEIGHT);
cairo_fill (cr);
}
}
}
cairo_destroy (cr2);
cairo_surface_destroy (image);
image = NULL;
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (mask,
"Tests of cairo_mask",
"mask", /* keywords */
NULL, /* requirements */
IMAGE_WIDTH, IMAGE_HEIGHT,
NULL, draw)