/* GdkPixbuf library - test compositing

 *

 * Copyright (C) 2015 Red Hat, Inc.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program 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.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, see <http://www.gnu.org/licenses/>.

 *

 * Author: Matthias Clasen

 */

#include <gdk-pixbuf.h>

#include "test-common.h"

static void

test_composite1 (void)

{

  GdkPixbuf *red, *green, *out, *ref, *sub;

  red = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, 24, 24);

  gdk_pixbuf_fill (red, 0xff000000);

  green = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, 12, 12);

  gdk_pixbuf_fill (green, 0x00ff0000);

  out = gdk_pixbuf_copy (red);

  gdk_pixbuf_composite (green, out,

                        0, 0, 12, 12,

                        0, 0, 1.0, 1.0,

                        GDK_INTERP_NEAREST,

                        255);

  ref = gdk_pixbuf_copy (red);

  sub = gdk_pixbuf_new_subpixbuf (ref, 0, 0, 12, 12);

  gdk_pixbuf_fill (sub, 0x00ff0000);

  g_assert (pixdata_equal (out, ref, NULL));

  g_object_unref (red);

  g_object_unref (green);

  g_object_unref (out);

  g_object_unref (ref);

  g_object_unref (sub);

}

/*

 * Test for Bug 766842

 * https://bugzilla.gnome.org/show_bug.cgi?id=766842

 */

static void

test_composite2 (void)

{

  GdkPixbuf *src, *dest;

  guchar *pixels, *p;

  src = gdk_pixbuf_new_from_file (g_test_get_filename (G_TEST_DIST, "test-image.png", NULL), NULL);

  {

    GdkPixbuf *tmp = gdk_pixbuf_new (GDK_COLORSPACE_RGB,

                                     TRUE,

                                     gdk_pixbuf_get_bits_per_sample (src),

                                     gdk_pixbuf_get_width (src),

                                     gdk_pixbuf_get_height (src));

    gdk_pixbuf_fill (tmp, 0x00ccccff);

    gdk_pixbuf_composite (src, tmp,

                          0, 0, gdk_pixbuf_get_width (tmp), gdk_pixbuf_get_height (tmp),

                          0., 0., 1., 1.,

                          GDK_INTERP_NEAREST, 255);

    g_object_unref (src);

    src = tmp;

  }

  pixels = gdk_pixbuf_get_pixels (src);

  p = pixels;

  p[0] = 0xff;

  p[1] = 0x00;

  p[2] = 0xff;

  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));

  p[0] = 0xff;

  p[1] = 0xff;

  p[2] = 0x00;

  dest = gdk_pixbuf_new (GDK_COLORSPACE_RGB,

                         TRUE,

                         gdk_pixbuf_get_bits_per_sample (src),

                         gdk_pixbuf_get_width (src) + 80,

                         gdk_pixbuf_get_height (src) + 80);

  gdk_pixbuf_fill (dest, 0xffffffff);

  gdk_pixbuf_composite (src, dest,

                        0, 0, gdk_pixbuf_get_width (dest), gdk_pixbuf_get_height (dest),

                        10.0, 10.0, 1.0, 1.0,

                        GDK_INTERP_NEAREST, 255);

  pixels = gdk_pixbuf_get_pixels (dest);

  p = pixels;

  g_assert_cmpint (p[0], ==, 0xff);

  g_assert_cmpint (p[1], ==, 0x00);

  g_assert_cmpint (p[2], ==, 0xff);

  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));

  g_assert_cmpint (p[0], ==, 0xff);

  g_assert_cmpint (p[1], ==, 0xff);

  g_assert_cmpint (p[2], ==, 0x00);

  g_object_unref (dest);

  /* now try compositing into a pixbuf that is 1px less in width and height */

  dest = gdk_pixbuf_new (GDK_COLORSPACE_RGB,

                         TRUE,

                         gdk_pixbuf_get_bits_per_sample (src),

                         gdk_pixbuf_get_width (src) - 1,

                         gdk_pixbuf_get_height (src) - 1);

  gdk_pixbuf_fill (dest, 0xffffffff);

  gdk_pixbuf_composite (src, dest,

                        0, 0, gdk_pixbuf_get_width (dest), gdk_pixbuf_get_height (dest),

                        -1.0, -2.0, 1.0, 1.0,

                        GDK_INTERP_NEAREST, 255);

  pixels = gdk_pixbuf_get_pixels (dest);

  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));

  g_assert_cmpint (p[0], ==, 0xff);

  g_assert_cmpint (p[1], ==, 0xff);

  g_assert_cmpint (p[2], ==, 0x00);

  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));

  g_assert_cmpint (p[0], ==, 0xff);

  g_assert_cmpint (p[1], ==, 0xff);

  g_assert_cmpint (p[2], ==, 0x00);

  g_object_unref (dest);

  g_object_unref (src);

}

int

main (int argc, char *argv[])

{

  g_test_init (&argc, &argv, NULL);

  g_test_add_func ("/pixbuf/composite1", test_composite1);

  g_test_add_func ("/pixbuf/composite2", test_composite2);

  return g_test_run ();

}