diff options
author | Chris Wilson <chris@chris-wilson.co.uk> | 2008-04-11 23:40:36 +0100 |
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committer | Chris Wilson <chris@chris-wilson.co.uk> | 2008-04-11 23:57:01 +0100 |
commit | 28a1dabed8cf50d9bec552bd9d3a18580c1c6711 (patch) | |
tree | c299ef5a0dd6c89bb893441840fe3b8050a60f4e /test/xlib-expose-event.c | |
parent | 75001079c1c6361f116409dc13263e87081637d1 (diff) |
[test] Add a regression test for bug 10921
This bug first was fixed in 40558cb15e5f7276a29847b00c9dae08b9d9380e,
but then reintroduced in 9cfd82e87b60c0d65e9cafda026cb9a498874575, which
became part of the 1.6.2 quick release.
As penance to make sure I never repeat this same bug again, I offer this
test case which exercises the XSetClipMask(NULL) path and hopefully
simulates some 'typical' usage of cairo by GUI toolkits.
Diffstat (limited to 'test/xlib-expose-event.c')
-rw-r--r-- | test/xlib-expose-event.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/test/xlib-expose-event.c b/test/xlib-expose-event.c new file mode 100644 index 000000000..338f29879 --- /dev/null +++ b/test/xlib-expose-event.c @@ -0,0 +1,275 @@ +/* + * 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 <stdio.h> +#include <stdlib.h> + +#include "cairo.h" +#include "cairo-xlib.h" +#include "cairo-test.h" + +#include "cairo-boilerplate-xlib.h" + +#include "buffer-diff.h" + +#define SIZE 160 +#define NLOOPS 10 + +static const char png_filename[] = "romedalen.png"; + +static cairo_bool_t +check_visual (Display *dpy) +{ + Visual *visual = DefaultVisual (dpy, DefaultScreen (dpy)); + + if ((visual->red_mask == 0xff0000 && + visual->green_mask == 0x00ff00 && + visual->blue_mask == 0x0000ff) || + (visual->red_mask == 0x0000ff && + visual->green_mask == 0x00ff00 && + visual->blue_mask == 0xff0000)) + return 1; + else + return 0; +} + +static void +clear (cairo_surface_t *surface) +{ + cairo_t *cr = cairo_create (surface); + cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR); + cairo_paint (cr); + cairo_destroy (cr); +} + +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); + cairo_boilerplate_xlib_surface_disable_render (surface); + + cr2 = cairo_create (surface); + + /* This complex clip and forcing of fallbacks is to reproduce bug + * http://bugs.freedesktop.org/show_bug.cgi?id=10921 + */ + 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_destroy (cr2); + + cairo_set_source_rgb (cr, 1, 0, 0); + cairo_mask_surface (cr, surface, 50, 50); + cairo_surface_destroy (surface); +} + +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_set_source_surface (cr, surface, 0, 0); + cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); + cairo_paint (cr); + cairo_destroy (cr); + + return similar; +} + +static void +draw_image (cairo_t *cr) +{ + cairo_surface_t *surface, *similar; + + surface = cairo_test_create_surface_from_png (png_filename); + similar = clone_similar_surface (cairo_get_group_target (cr), surface); + cairo_surface_destroy (surface); + + cairo_set_source_surface (cr, similar, 0, 0); + cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); + cairo_paint (cr); + cairo_surface_destroy (similar); +} + +static void +draw (cairo_surface_t *surface, cairo_rectangle_t *region, int n_regions) +{ + cairo_t *cr = cairo_create (surface); + 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 (cr); + draw_mask (cr); + cairo_pop_group_to_source (cr); + cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); + cairo_paint (cr); + cairo_destroy (cr); +} + +static cairo_test_status_t +compare (cairo_surface_t *surface) +{ + cairo_t *cr; + cairo_surface_t *image, *reference, *diff; + buffer_diff_result_t result; + + diff = cairo_image_surface_create (CAIRO_FORMAT_RGB24, SIZE, SIZE); + + /* copy the pixmap to an image buffer */ + image = cairo_image_surface_create (CAIRO_FORMAT_RGB24, SIZE, SIZE); + cr = cairo_create (image); + cairo_set_source_surface (cr, surface, 0, 0); + cairo_paint (cr); + cairo_destroy (cr); + + reference = cairo_test_create_surface_from_png ("xlib-expose-event-ref.png"); + if (cairo_image_surface_get_width (image) != cairo_image_surface_get_width (reference) || + cairo_image_surface_get_height (image) != cairo_image_surface_get_height (reference)) + return CAIRO_TEST_FAILURE; + + compare_surfaces (reference, image, diff, &result); + + cairo_surface_destroy (reference); + cairo_surface_destroy (image); + cairo_surface_destroy (diff); + + return result.pixels_changed ? CAIRO_TEST_FAILURE : CAIRO_TEST_SUCCESS; +} + +int +main (void) +{ + Display *dpy; + Drawable drawable; + int screen; + cairo_surface_t *surface; + cairo_rectangle_t region[4]; + int i, j; + cairo_test_status_t result = CAIRO_TEST_SUCCESS; + + cairo_test_init ("xlib-expose-event"); + + dpy = XOpenDisplay (NULL); + if (dpy == NULL) { + cairo_test_log ("xlib-expose-event: Cannot open display, skipping\n"); + goto CLEANUP_TEST; + } + + if (! check_visual (dpy)) { + cairo_test_log ("xlib-expose-event: default visual is not RGB24 or BGR24, skipping\n"); + goto CLEANUP_DISPLAY; + } + + screen = DefaultScreen (dpy); + drawable = XCreatePixmap (dpy, DefaultRootWindow (dpy), + SIZE, SIZE, DefaultDepth (dpy, screen)); + surface = cairo_xlib_surface_create (dpy, + drawable, + DefaultVisual (dpy, screen), + SIZE, SIZE); + clear (surface); + draw (surface, 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 (surface, region, 4); + } + } + + result = compare (surface); + + cairo_surface_destroy (surface); + + XFreePixmap (dpy, drawable); + + CLEANUP_DISPLAY: + XCloseDisplay (dpy); + + CLEANUP_TEST: + cairo_debug_reset_static_data (); + + cairo_test_fini (); + + return result; +} + |