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436c0c8be2
In order to run under memfault, the framework is first extended to handle running concurrent tests - i.e. multi-threading. (Not that this is a requirement for memfault, instead it shares a common goal of storing per-test data). To that end all the global data is moved into a per-test context and the targets are adjusted to avoid overlap on shared, global resources (such as output files and frame buffers). In order to preserve the simplicity of the standard draw routines, the context is not passed explicitly as a parameter to the routines, but is instead attached to the cairo_t via the user_data. For the masochist, to enable the tests to be run across multiple threads simply set the environment variable CAIRO_TEST_NUM_THREADS to the desired number. In the long run, we can hope the need for memfault (runtime testing of error paths) will be mitigated by static analysis. A promising candidate for this task would appear to be http://hal.cs.berkeley.edu/cil/.
93 lines
3.1 KiB
C
93 lines
3.1 KiB
C
/*
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* Copyright © 2006 Red Hat, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without
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* fee, provided that the above copyright notice appear in all copies
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* and that both that copyright notice and this permission notice
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* appear in supporting documentation, and that the name of
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* Red Hat, Inc. not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior
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* permission. Red Hat, Inc. makes no representations about the
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* suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
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* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: Carl D. Worth <cworth@cworth.org>
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*/
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#include "cairo-test.h"
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#define SIZE 8
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#define PAD 2
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static cairo_test_draw_function_t draw;
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static const cairo_test_t test = {
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"get-group-target",
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"Test of both cairo_get_group_target and cairo_surface_get_device_offset",
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SIZE, SIZE,
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draw
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};
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static cairo_test_status_t
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draw (cairo_t *cr, int width, int height)
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{
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cairo_surface_t *group;
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double x, y;
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/* First paint background in blue. */
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cairo_set_source_rgb (cr, 0.0, 0.0, 1.0);
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cairo_paint (cr);
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/* Then clip so that the group surface ends up smaller than the
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* original surface. */
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cairo_rectangle (cr, PAD, PAD, width - 2 * PAD, height - 2 * PAD);
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cairo_clip (cr);
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/* Paint the clipped region in red (which should all be overwritten later). */
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cairo_set_source_rgb (cr, 1.0, 0.0, 0.0);
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cairo_paint (cr);
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/* Redirect to a new group and get that surface. */
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cairo_push_group (cr);
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group = cairo_get_group_target (cr);
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/* Then paint in green what we query the group surface size to be. */
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cairo_set_source_rgb (cr, 0.0, 1.0, 0.0);
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cairo_surface_get_device_offset (group, &x, &y);
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/* Or rather, we calculate the group surface size based on the
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* only thing we can query which is the device offset. Ideally,
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* the size would always be the minimal (width - 2 * PAD, height -
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* 2 * PAD) based on the clip. But currently, group targets are
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* created oversized for paginated surfaces, so we only subtract
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* anything from the size if there is a non-zero device offfset.
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*
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* The calculation below might also be less confusing if the sign
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* convention on the device offset were reversed, but it is what
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* it is. Oh well. */
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cairo_rectangle (cr,
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-x, -y,
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width + 2 * x,
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height + 2 * y);
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cairo_fill (cr);
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/* Finish up the group painting. */
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cairo_pop_group_to_source (cr);
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cairo_paint (cr);
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return CAIRO_TEST_SUCCESS;
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}
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int
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main (void)
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{
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return cairo_test (&test);
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}
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