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/* GdkPixbuf library - test compositing
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*
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* Copyright (C) 2015 Red Hat, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Matthias Clasen
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*/
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#include <gdk-pixbuf.h>
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#include "test-common.h"
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static void
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test_composite1 (void)
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{
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GdkPixbuf *red, *green, *out, *ref, *sub;
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red = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, 24, 24);
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gdk_pixbuf_fill (red, 0xff000000);
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green = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, 12, 12);
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gdk_pixbuf_fill (green, 0x00ff0000);
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out = gdk_pixbuf_copy (red);
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gdk_pixbuf_composite (green, out,
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0, 0, 12, 12,
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0, 0, 1.0, 1.0,
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GDK_INTERP_NEAREST,
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255);
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ref = gdk_pixbuf_copy (red);
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sub = gdk_pixbuf_new_subpixbuf (ref, 0, 0, 12, 12);
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gdk_pixbuf_fill (sub, 0x00ff0000);
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g_assert (pixdata_equal (out, ref, NULL));
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g_object_unref (red);
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g_object_unref (green);
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g_object_unref (out);
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g_object_unref (ref);
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g_object_unref (sub);
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}
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/*
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* Test for Bug 766842
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* https://bugzilla.gnome.org/show_bug.cgi?id=766842
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*/
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static void
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test_composite2 (void)
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{
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GdkPixbuf *src, *dest;
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guchar *pixels, *p;
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src = gdk_pixbuf_new_from_file (g_test_get_filename (G_TEST_DIST, "test-image.png", NULL), NULL);
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{
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GdkPixbuf *tmp = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
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TRUE,
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gdk_pixbuf_get_bits_per_sample (src),
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gdk_pixbuf_get_width (src),
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gdk_pixbuf_get_height (src));
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gdk_pixbuf_fill (tmp, 0x00ccccff);
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gdk_pixbuf_composite (src, tmp,
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0, 0, gdk_pixbuf_get_width (tmp), gdk_pixbuf_get_height (tmp),
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0., 0., 1., 1.,
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GDK_INTERP_NEAREST, 255);
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g_object_unref (src);
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src = tmp;
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}
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pixels = gdk_pixbuf_get_pixels (src);
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p = pixels;
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p[0] = 0xff;
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p[1] = 0x00;
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p[2] = 0xff;
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p = pixels + (gsize)((gdk_pixbuf_get_height (src) - 1) * gdk_pixbuf_get_rowstride (src)) + (gsize)((gdk_pixbuf_get_width (src) - 1) * gdk_pixbuf_get_n_channels (src));
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p[0] = 0xff;
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p[1] = 0xff;
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p[2] = 0x00;
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dest = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
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TRUE,
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gdk_pixbuf_get_bits_per_sample (src),
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gdk_pixbuf_get_width (src) + 80,
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gdk_pixbuf_get_height (src) + 80);
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gdk_pixbuf_fill (dest, 0xffffffff);
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gdk_pixbuf_composite (src, dest,
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0, 0, gdk_pixbuf_get_width (dest), gdk_pixbuf_get_height (dest),
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10.0, 10.0, 1.0, 1.0,
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GDK_INTERP_NEAREST, 255);
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pixels = gdk_pixbuf_get_pixels (dest);
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p = pixels;
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g_assert_cmpint (p[0], ==, 0xff);
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g_assert_cmpint (p[1], ==, 0x00);
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g_assert_cmpint (p[2], ==, 0xff);
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p = pixels + (gsize)((gdk_pixbuf_get_height (dest) - 1) * gdk_pixbuf_get_rowstride (dest)) + (gsize)((gdk_pixbuf_get_width (dest) - 1) * gdk_pixbuf_get_n_channels (dest));
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g_assert_cmpint (p[0], ==, 0xff);
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g_assert_cmpint (p[1], ==, 0xff);
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g_assert_cmpint (p[2], ==, 0x00);
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g_object_unref (dest);
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/* now try compositing into a pixbuf that is 1px less in width and height */
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dest = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
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TRUE,
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gdk_pixbuf_get_bits_per_sample (src),
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gdk_pixbuf_get_width (src) - 1,
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gdk_pixbuf_get_height (src) - 1);
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gdk_pixbuf_fill (dest, 0xffffffff);
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gdk_pixbuf_composite (src, dest,
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0, 0, gdk_pixbuf_get_width (dest), gdk_pixbuf_get_height (dest),
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-1.0, -2.0, 1.0, 1.0,
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GDK_INTERP_NEAREST, 255);
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pixels = gdk_pixbuf_get_pixels (dest);
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p = pixels + (gsize)((gdk_pixbuf_get_height (dest) - 2) * gdk_pixbuf_get_rowstride (dest)) + (gsize)((gdk_pixbuf_get_width (dest) - 1) * gdk_pixbuf_get_n_channels (dest));
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g_assert_cmpint (p[0], ==, 0xff);
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g_assert_cmpint (p[1], ==, 0xff);
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g_assert_cmpint (p[2], ==, 0x00);
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p = pixels + (gsize)((gdk_pixbuf_get_height (dest) - 1) * gdk_pixbuf_get_rowstride (dest)) + (gsize)((gdk_pixbuf_get_width (dest) - 1) * gdk_pixbuf_get_n_channels (dest));
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g_assert_cmpint (p[0], ==, 0xff);
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g_assert_cmpint (p[1], ==, 0xff);
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g_assert_cmpint (p[2], ==, 0x00);
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g_object_unref (dest);
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g_object_unref (src);
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}
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int
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main (int argc, char *argv[])
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{
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g_test_init (&argc, &argv, NULL);
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g_test_add_func ("/pixbuf/composite1", test_composite1);
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g_test_add_func ("/pixbuf/composite2", test_composite2);
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return g_test_run ();
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}
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