gtk/gdk/tests/check-gdk-cairo.c

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/* This file is part of GTK+
*
* AUTHORS
* Sven Herzberg
*
* Copyright (C) 2008 Sven Herzberg
*
* This work is provided "as is"; redistribution and modification
* in whole or in part, in any medium, physical or electronic is
* permitted without restriction.
*
* This work is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* In no event shall the authors or contributors be liable for any
* direct, indirect, incidental, special, exemplary, or consequential
* damages (including, but not limited to, procurement of substitute
* goods or services; loss of use, data, or profits; or business
* interruption) however caused and on any theory of liability, whether
* in contract, strict liability, or tort (including negligence or
* otherwise) arising in any way out of the use of this software, even
* if advised of the possibility of such damage.
*/
#include <glib/gstdio.h>
#include <gdk/gdk.h>
#ifdef CAIRO_HAS_QUARTZ_SURFACE
#include <cairo-quartz.h>
#endif
static void
test (cairo_t* cr)
{
cairo_save (cr);
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
cairo_paint (cr);
cairo_restore (cr);
cairo_move_to (cr, 10.0, 20.0);
cairo_line_to (cr, 10.0, 30.0);
cairo_stroke (cr);
cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.5);
cairo_arc (cr, 0.0, 0.0, 10.0, 0.0, G_PI/2);
cairo_stroke (cr);
}
static void
test_pixmap_orientation (void)
{
GdkPixmap* pixmap;
GdkPixbuf* pixbuf;
GdkPixbuf* pbuf_platform;
GdkPixbuf* pbuf_imagesrf;
GError * error = NULL;
cairo_surface_t* surface;
cairo_t* cr;
guchar* data_platform;
guchar* data_imagesrf;
guint i;
/* create "platform.png" via GdkPixmap */
pixmap = gdk_pixmap_new (NULL /* drawable */, 100 /* w */, 80 /* h */, 24 /* d */);
cr = gdk_cairo_create (pixmap);
test (cr);
cairo_destroy (cr);
pixbuf = gdk_pixbuf_get_from_drawable (NULL,
pixmap,
gdk_rgb_get_colormap (),
0, 0,
0, 0,
100, 80);
if (!gdk_pixbuf_save (pixbuf, "gdksurface.png", "png", NULL, NULL)) {
g_error ("Eeek! Couldn't save the file \"gdksurface.png\"");
}
g_object_unref (pixbuf);
g_object_unref (pixmap);
/* create "cairosurface.png" via pure cairo */
#ifndef CAIRO_HAS_QUARTZ_SURFACE
surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, 100, 80);
#else
surface = cairo_quartz_surface_create (CAIRO_FORMAT_RGB24, 100, 80);
#endif
cr = cairo_create (surface);
test (cr);
cairo_destroy (cr);
if (CAIRO_STATUS_SUCCESS != cairo_surface_write_to_png (surface, "cairosurface.png")) {
g_error ("Eeek! Couldn't save the file \"cairosurface.png\"");
}
cairo_surface_destroy (surface);
/* compare the images */
pbuf_platform = gdk_pixbuf_new_from_file ("gdksurface.png", &error);
if (!pbuf_platform || error) {
g_error ("Eeek! Error loading \"gdksurface.png\"");
}
pbuf_imagesrf = gdk_pixbuf_new_from_file ("cairosurface.png", &error);
if (!pbuf_imagesrf || error) {
g_object_unref (pbuf_platform);
g_error ("Eeek! Error loading \"cairosurface.png\"");
}
g_assert (gdk_pixbuf_get_width (pbuf_platform) ==
gdk_pixbuf_get_width (pbuf_imagesrf));
g_assert (gdk_pixbuf_get_height (pbuf_platform) ==
gdk_pixbuf_get_height (pbuf_imagesrf));
g_assert (gdk_pixbuf_get_rowstride (pbuf_platform) ==
gdk_pixbuf_get_rowstride (pbuf_imagesrf));
g_assert (gdk_pixbuf_get_n_channels (pbuf_platform) ==
gdk_pixbuf_get_n_channels (pbuf_imagesrf));
data_platform = gdk_pixbuf_get_pixels (pbuf_platform);
data_imagesrf = gdk_pixbuf_get_pixels (pbuf_imagesrf);
for (i = 0; i < gdk_pixbuf_get_height (pbuf_platform) * gdk_pixbuf_get_rowstride (pbuf_platform); i++) {
if (data_platform[i] != data_imagesrf[i]) {
g_warning ("Eeek! Images are differing at byte %d", i);
g_object_unref (pbuf_platform);
g_object_unref (pbuf_imagesrf);
g_assert_not_reached ();
}
}
g_object_unref (pbuf_platform);
g_object_unref (pbuf_imagesrf);
g_unlink ("gdksurface.png");
g_unlink ("cairosurface.png");
}
int
main (int argc,
char**argv)
{
g_test_init (&argc, &argv, NULL);
gdk_init (&argc, &argv);
g_test_add_func ("/gdk/pixmap/orientation",
test_pixmap_orientation);
return g_test_run ();
}