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cairo/test/get-clip.c
Chris Wilson 3bf06c3366 [test/*] Create new surfaces using the group target. 
cairo_get_target() returns the original surface passed to
cairo_create(), and not the current destination as required when
testing drawing to the same surface using multiple contexts.

For completeness we also use the group target when creating similar
surfaces within the tests (to check that similar surfaces of similar
surfaces also work).
2007-12-20 21:21:32 +00:00

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/*
* Copyright © 2006 Novell, 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
* Novell, Inc. not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Novell, Inc. makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* NOVELL, 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: Robert O'Callahan <rocallahan@novell.com>
*/
#include "cairo-test.h"
#include <stddef.h>
static cairo_test_draw_function_t draw;
cairo_test_t test = {
"get-clip",
"Test cairo_copy_clip_rectangle_list and cairo_clip_extents",
0, 0,
draw
};
static cairo_bool_t
check_count (const char *message, cairo_bool_t uses_clip_rects,
cairo_rectangle_list_t *list, int expected)
{
if (!uses_clip_rects) {
if (expected == 0 && list->num_rectangles == 0)
return 1;
if (list->num_rectangles == expected)
return 1;
if (list->status == CAIRO_STATUS_CLIP_NOT_REPRESENTABLE)
return 1;
cairo_test_log ("Error: %s; cairo_copy_clip_rectangle_list unexpectedly got %d rectangles\n",
message, list->num_rectangles);
return 0;
}
if (list->status != CAIRO_STATUS_SUCCESS) {
cairo_test_log ("Error: %s; cairo_copy_clip_rectangle_list failed with \"%s\"\n",
message, cairo_status_to_string(list->status));
return 0;
}
if (list->num_rectangles == expected)
return 1;
cairo_test_log ("Error: %s; expected %d rectangles, got %d\n", message,
expected, list->num_rectangles);
return 0;
}
static cairo_bool_t
check_unrepresentable (const char *message, cairo_rectangle_list_t *list)
{
if (list->status != CAIRO_STATUS_CLIP_NOT_REPRESENTABLE) {
cairo_test_log ("Error: %s; cairo_copy_clip_rectangle_list got unexpected result \"%s\"\n"
" (we expected CAIRO_STATUS_CLIP_NOT_REPRESENTABLE)",
message, cairo_status_to_string(list->status));
return 0;
}
return 1;
}
static cairo_bool_t
check_rectangles_contain (const char *message, cairo_bool_t uses_clip_rects,
cairo_rectangle_list_t *list,
double x, double y, double width, double height)
{
int i;
if (!uses_clip_rects)
return 1;
for (i = 0; i < list->num_rectangles; ++i) {
if (list->rectangles[i].x == x && list->rectangles[i].y == y &&
list->rectangles[i].width == width && list->rectangles[i].height == height)
return 1;
}
cairo_test_log ("Error: %s; rectangle list does not contain rectangle %f,%f,%f,%f\n",
message, x, y, width, height);
return 0;
}
static cairo_bool_t
check_clip_extents (const char *message, cairo_t *cr,
double x, double y, double width, double height)
{
double ext_x1, ext_y1, ext_x2, ext_y2;
cairo_clip_extents (cr, &ext_x1, &ext_y1, &ext_x2, &ext_y2);
if (ext_x1 == x && ext_y1 == y && ext_x2 == x + width && ext_y2 == y + height)
return 1;
cairo_test_log ("Error: %s; clip extents %f,%f,%f,%f should be %f,%f,%f,%f\n",
message, ext_x1, ext_y1, ext_x2 - ext_x1, ext_y2 - ext_y1,
x, y, width, height);
return 0;
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_surface_t *surface;
cairo_t *cr2;
cairo_rectangle_list_t *rectangle_list;
const char *phase;
cairo_bool_t uses_clip_rects;
surface = cairo_surface_create_similar (cairo_get_group_target (cr),
CAIRO_CONTENT_COLOR, 100, 100);
/* don't use cr accidentally */
cr = NULL;
cr2 = cairo_create (surface);
cairo_surface_destroy (surface);
/* Check the surface type so we ignore cairo_copy_clip_rectangle_list failures
* on surface types that don't use rectangle lists for clipping.
* Default to FALSE for the internal surface types, (meta, test-fallback, etc.)
*/
switch (cairo_surface_get_type (surface)) {
case CAIRO_SURFACE_TYPE_IMAGE:
case CAIRO_SURFACE_TYPE_XLIB:
case CAIRO_SURFACE_TYPE_XCB:
case CAIRO_SURFACE_TYPE_GLITZ:
case CAIRO_SURFACE_TYPE_WIN32:
case CAIRO_SURFACE_TYPE_BEOS:
case CAIRO_SURFACE_TYPE_DIRECTFB:
uses_clip_rects = TRUE;
break;
case CAIRO_SURFACE_TYPE_QUARTZ:
case CAIRO_SURFACE_TYPE_PDF:
case CAIRO_SURFACE_TYPE_PS:
case CAIRO_SURFACE_TYPE_SVG:
case CAIRO_SURFACE_TYPE_OS2:
default:
uses_clip_rects = FALSE;
break;
}
/* first, test basic stuff. This should not be clipped, it should
return the surface rectangle. */
phase = "No clip set";
rectangle_list = cairo_copy_clip_rectangle_list (cr2);
if (!check_count (phase, uses_clip_rects, rectangle_list, 1) ||
!check_clip_extents (phase, cr2, 0, 0, 100, 100) ||
!check_rectangles_contain(phase, uses_clip_rects, rectangle_list, 0, 0, 100, 100)) {
cairo_rectangle_list_destroy (rectangle_list);
return CAIRO_TEST_FAILURE;
}
cairo_rectangle_list_destroy (rectangle_list);
/* Test simple clip rect. */
phase = "Simple clip rect";
cairo_save (cr2);
cairo_rectangle (cr2, 10, 10, 80, 80);
cairo_clip (cr2);
rectangle_list = cairo_copy_clip_rectangle_list (cr2);
if (!check_count (phase, uses_clip_rects, rectangle_list, 1) ||
!check_clip_extents (phase, cr2, 10, 10, 80, 80) ||
!check_rectangles_contain(phase, uses_clip_rects, rectangle_list, 10, 10, 80, 80)) {
cairo_rectangle_list_destroy (rectangle_list);
return CAIRO_TEST_FAILURE;
}
cairo_rectangle_list_destroy (rectangle_list);
cairo_restore (cr2);
/* Test everything clipped out. */
phase = "All clipped out";
cairo_save (cr2);
cairo_clip (cr2);
rectangle_list = cairo_copy_clip_rectangle_list (cr2);
if (!check_count (phase, uses_clip_rects, rectangle_list, 0)) {
cairo_rectangle_list_destroy (rectangle_list);
return CAIRO_TEST_FAILURE;
}
cairo_rectangle_list_destroy (rectangle_list);
cairo_restore (cr2);
/* test two clip rects */
phase = "Two clip rects";
cairo_save (cr2);
cairo_rectangle (cr2, 10, 10, 10, 10);
cairo_rectangle (cr2, 20, 20, 10, 10);
cairo_clip (cr2);
cairo_rectangle (cr2, 15, 15, 10, 10);
cairo_clip (cr2);
rectangle_list = cairo_copy_clip_rectangle_list (cr2);
if (!check_count (phase, uses_clip_rects, rectangle_list, 2) ||
!check_clip_extents (phase, cr2, 15, 15, 10, 10) ||
!check_rectangles_contain(phase, uses_clip_rects, rectangle_list, 15, 15, 5, 5) ||
!check_rectangles_contain(phase, uses_clip_rects, rectangle_list, 20, 20, 5, 5)) {
cairo_rectangle_list_destroy (rectangle_list);
return CAIRO_TEST_FAILURE;
}
cairo_rectangle_list_destroy (rectangle_list);
cairo_restore (cr2);
/* test non-rectangular clip */
phase = "Nonrectangular clip";
cairo_save (cr2);
cairo_move_to (cr2, 0, 0);
cairo_line_to (cr2, 100, 100);
cairo_line_to (cr2, 100, 0);
cairo_close_path (cr2);
cairo_clip (cr2);
rectangle_list = cairo_copy_clip_rectangle_list (cr2);
/* can't get this in one tight user-space rectangle */
if (!check_unrepresentable (phase, rectangle_list) ||
!check_clip_extents (phase, cr2, 0, 0, 100, 100)) {
cairo_rectangle_list_destroy (rectangle_list);
return CAIRO_TEST_FAILURE;
}
cairo_rectangle_list_destroy (rectangle_list);
cairo_restore (cr2);
phase = "User space, simple scale, getting clip with same transform";
cairo_save (cr2);
cairo_scale (cr2, 2, 2);
cairo_rectangle (cr2, 5, 5, 40, 40);
cairo_clip (cr2);
rectangle_list = cairo_copy_clip_rectangle_list (cr2);
if (!check_count (phase, uses_clip_rects, rectangle_list, 1) ||
!check_clip_extents (phase, cr2, 5, 5, 40, 40) ||
!check_rectangles_contain(phase, uses_clip_rects, rectangle_list, 5, 5, 40, 40)) {
cairo_rectangle_list_destroy (rectangle_list);
return CAIRO_TEST_FAILURE;
}
cairo_rectangle_list_destroy (rectangle_list);
cairo_restore (cr2);
phase = "User space, simple scale, getting clip with no transform";
cairo_save (cr2);
cairo_save (cr2);
cairo_scale (cr2, 2, 2);
cairo_rectangle (cr2, 5, 5, 40, 40);
cairo_restore (cr2);
cairo_clip (cr2);
rectangle_list = cairo_copy_clip_rectangle_list (cr2);
if (!check_count (phase, uses_clip_rects, rectangle_list, 1) ||
!check_clip_extents (phase, cr2, 10, 10, 80, 80) ||
!check_rectangles_contain(phase, uses_clip_rects, rectangle_list, 10, 10, 80, 80)) {
cairo_rectangle_list_destroy (rectangle_list);
return CAIRO_TEST_FAILURE;
}
cairo_rectangle_list_destroy (rectangle_list);
cairo_restore (cr2);
phase = "User space, rotation, getting clip with no transform";
cairo_save (cr2);
cairo_save (cr2);
cairo_rotate (cr2, 12);
cairo_rectangle (cr2, 5, 5, 40, 40);
cairo_restore (cr2);
cairo_clip (cr2);
rectangle_list = cairo_copy_clip_rectangle_list (cr2);
if (!check_unrepresentable (phase, rectangle_list)) {
cairo_rectangle_list_destroy (rectangle_list);
return CAIRO_TEST_FAILURE;
}
cairo_rectangle_list_destroy (rectangle_list);
cairo_restore (cr2);
cairo_destroy (cr2);
return CAIRO_TEST_SUCCESS;
}
int
main (void)
{
return cairo_test (&test);
}
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