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/*
* Copyright © 2008 Chris Wilson
*
* 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
* Chris Wilson not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Chris Wilson makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL CHRIS WILSON 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: Chris Wilson <chris@chris-wilson.co.uk>
*/
/* This test tries to emulate the behaviour of most toolkits; it tries
* to simulate typical usage of a single surface with multiple exposures.
*
* The first goal of the test is to reproduce the XSetClipMask(NULL) bug
* reintroduced in 1.6.2 (but was originally fixed in 40558cb15). As I've
* made the same mistake again, it is worth adding a regression test...
*/
#include "cairo-test.h"
#include <stdio.h>
#include <stdlib.h>
#include "cairo.h"
#include "buffer-diff.h"
#define SIZE 160
#define NLOOPS 10
static const char *png_filename = "romedalen.png";
static void
draw_mask (cairo_t *cr)
{
cairo_surface_t *surface;
cairo_t *cr2;
surface = cairo_surface_create_similar (cairo_get_group_target (cr),
CAIRO_CONTENT_ALPHA,
50, 50);
cr2 = cairo_create (surface);
cairo_surface_destroy (surface);
cairo_rectangle (cr2,
0, 0,
40, 40);
cairo_rectangle (cr2,
10, 10,
40, 40);
cairo_clip (cr2);
cairo_move_to (cr2, 0, 25);
cairo_line_to (cr2, 50, 25);
cairo_move_to (cr2, 25, 0);
cairo_line_to (cr2, 25, 50);
cairo_set_source_rgb (cr2, 1, 1, 1);
cairo_stroke (cr2);
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_mask_surface (cr, cairo_get_target (cr2), 50, 50);
cairo_destroy (cr2);
}
static cairo_surface_t *
clone_similar_surface (cairo_surface_t * target, cairo_surface_t *surface)
{
cairo_t *cr;
cairo_surface_t *similar;
similar = cairo_surface_create_similar (target,
cairo_surface_get_content (surface),
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface));
cr = cairo_create (similar);
cairo_surface_destroy (similar);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
similar = cairo_surface_reference (cairo_get_target (cr));
cairo_destroy (cr);
return similar;
}
static void
draw_image (const cairo_test_context_t *ctx,
cairo_t *cr,
cairo_surface_t *image)
{
cairo_set_source_surface (cr, image, 0, 0);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
}
static void
draw (const cairo_test_context_t *ctx,
cairo_t *cr,
cairo_surface_t *image,
cairo_rectangle_t *region,
int n_regions)
{
cairo_save (cr);
if (region != NULL) {
int i;
for (i = 0; i < n_regions; i++) {
cairo_rectangle (cr,
region[i].x, region[i].y,
region[i].width, region[i].height);
}
cairo_clip (cr);
}
cairo_push_group (cr);
draw_image (ctx, cr, image);
draw_mask (cr);
cairo_pop_group_to_source (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
cairo_restore (cr);
}
static cairo_test_status_t
draw_func (cairo_t *cr, int width, int height)
{
cairo_rectangle_t region[4];
const cairo_test_context_t *ctx;
cairo_surface_t *source, *image;
int i, j;
ctx = cairo_test_get_context (cr);
source = cairo_test_create_surface_from_png (ctx, png_filename);
image = clone_similar_surface (cairo_get_group_target (cr), source);
cairo_surface_destroy (source);
cairo_push_group_with_content (cr, CAIRO_CONTENT_COLOR);
draw (ctx, cr, image, NULL, 0);
for (i = 0; i < NLOOPS; i++) {
for (j = 0; j < NLOOPS; j++) {
region[0].x = i * SIZE / NLOOPS;
region[0].y = i * SIZE / NLOOPS;
region[0].width = SIZE / 4;
region[0].height = SIZE / 4;
region[1].x = j * SIZE / NLOOPS;
region[1].y = j * SIZE / NLOOPS;
region[1].width = SIZE / 4;
region[1].height = SIZE / 4;
region[2].x = i * SIZE / NLOOPS;
region[2].y = j * SIZE / NLOOPS;
region[2].width = SIZE / 4;
region[2].height = SIZE / 4;
region[3].x = j * SIZE / NLOOPS;
region[3].y = i * SIZE / NLOOPS;
region[3].width = SIZE / 4;
region[3].height = SIZE / 4;
draw (ctx, cr, image, region, 4);
}
}
cairo_pop_group_to_source (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
cairo_surface_destroy (image);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (xlib_expose_event,
"Emulate a typical expose event",
"xlib", /* keywords */
NULL, /* requirements */
SIZE, SIZE,
NULL, draw_func)
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