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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: Kristian Høgsberg <krh@redhat.com>
*/
#include <math.h>
#include "cairo-test.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
draw_rect (cairo_t *cr, int x, int y)
{
cairo_new_path (cr);
cairo_rectangle (cr, x, y, WIDTH, HEIGHT);
cairo_fill (cr);
}
static void
draw_rects (cairo_t *cr, int x, int y)
{
int width = WIDTH / 3;
int height = HEIGHT / 2;
cairo_new_path (cr);
cairo_rectangle (cr, x, y, width, height);
cairo_rectangle (cr, x + width, y + height, width, height);
cairo_rectangle (cr, x + 2 * width, y, width, height);
cairo_fill (cr);
}
static void
draw_polygon (cairo_t *cr, int x, int y)
{
cairo_new_path (cr);
cairo_move_to (cr, x, y);
cairo_line_to (cr, x, y + HEIGHT);
cairo_line_to (cr, x + WIDTH / 2, y + 3 * HEIGHT / 4);
cairo_line_to (cr, x + WIDTH, y + HEIGHT);
cairo_line_to (cr, x + WIDTH, y);
cairo_line_to (cr, x + WIDTH / 2, y + HEIGHT / 4);
cairo_close_path (cr);
cairo_fill (cr);
}
static void
clip_none (cairo_t *cr, int x, int y)
{
}
static void
clip_rect (cairo_t *cr, int x, int y)
{
cairo_new_path (cr);
cairo_rectangle (cr, x + (int)WIDTH / 6, y + (int)HEIGHT / 6,
4 * ((int)WIDTH / 6), 4 * ((int)WIDTH / 6));
cairo_clip (cr);
cairo_new_path (cr);
}
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);
cairo_new_path (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 / 3, 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 draw_funcs[])(cairo_t *cr, int x, int y) = {
draw_rect,
draw_rects,
draw_polygon,
};
static void (* const clip_funcs[])(cairo_t *cr, int x, int y) = {
clip_none,
clip_rect,
clip_rects,
clip_circle,
};
#define IMAGE_WIDTH (ARRAY_LENGTH (pattern_funcs) * (WIDTH + PAD) + PAD)
#define IMAGE_HEIGHT (ARRAY_LENGTH (draw_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);
size_t i, j, k, x, y;
for (k = 0; k < ARRAY_LENGTH (clip_funcs); k++) {
for (j = 0; j < ARRAY_LENGTH (draw_funcs); j++) {
for (i = 0; i < ARRAY_LENGTH (pattern_funcs); i++) {
x = i * (WIDTH + PAD) + PAD;
y = (ARRAY_LENGTH (draw_funcs) * k + j) * (HEIGHT + PAD) + PAD;
cairo_save (cr);
cairo_move_to (cr, x, y);
clip_funcs[k] (cr, x, y);
pattern_funcs[i] (ctx, cr, x, y);
draw_funcs[j] (cr, x, y);
if (cairo_status (cr))
cairo_test_log (ctx, "%d %d HERE!\n", (int)i, (int)j);
cairo_restore (cr);
}
}
}
if (cairo_status (cr) != CAIRO_STATUS_SUCCESS)
cairo_test_log (ctx, "%d %d .HERE!\n", (int)i, (int)j);
cairo_surface_destroy (image);
image = NULL;
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (trap_clip,
"Trapezoid clipping",
"clip, trap", /* keywords */
NULL, /* requirements */
IMAGE_WIDTH, IMAGE_HEIGHT,
NULL, draw)
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