diff options
Diffstat (limited to 'gdk-pixbuf/gdk-pixbuf-util.c')
| -rw-r--r-- | gdk-pixbuf/gdk-pixbuf-util.c | 61 |
1 files changed, 60 insertions, 1 deletions
diff --git a/gdk-pixbuf/gdk-pixbuf-util.c b/gdk-pixbuf/gdk-pixbuf-util.c index b507d2507..2bc7e98b0 100644 --- a/gdk-pixbuf/gdk-pixbuf-util.c +++ b/gdk-pixbuf/gdk-pixbuf-util.c @@ -2,7 +2,8 @@ * * Copyright (C) 1999 The Free Software Foundation * - * Author: Federico Mena-Quintero <federico@gimp.org> + * Authors: Federico Mena-Quintero <federico@gimp.org> + * Cody Russell <bratsche@dfw.net> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public @@ -93,3 +94,61 @@ gdk_pixbuf_add_alpha (GdkPixbuf *pixbuf, gboolean substitute_color, guchar r, gu return new_pixbuf; } + +/** + * gdk_pixbuf_copy_area: + * @src_pixbuf: The pixbuf to be copied. + * @src_x: The X coordinate of the upper left corner of the area to copy. + * @src_y: The Y coordinate of the upper left corner of the area to copy. + * @width: The width of the area to copy. + * @height: The height of the area to copy. + * @dest_pixbuf: The pixbuf to store the copy in. + * @dest_x: X coordinate for the upper left corner of the rectangle to draw to in @dest_pixbuf. + * @dest_y: Y coordinate for the upper left corner of the rectangle to draw to in @dest_pixbuf. + * + * Takes a rectangle area beginning at (@src_x, @src_y) @width pixels wide + * and @height pixels high from @src_pixbuf and copy it into @dest_pixbuf + * at (@dest_x, @dest_y). @dest_pixbuf must already be created and must be + * large enough to hold the requested area. + * + * Return value: void + **/ +void gdk_pixbuf_copy_area(GdkPixbuf *src_pixbuf, + gint src_x, gint src_y, + gint width, gint height, + GdkPixbuf *dest_pixbuf, + gint dest_x, gint dest_y) +{ + gint src_width, src_height, dest_width, dest_height; + + /* Ensure that we have a source pixbuf, and that the requested + * area is not larger than that pixbuf. + */ + g_return_if_fail(src_pixbuf != NULL); + + src_width = gdk_pixbuf_get_width(src_pixbuf); + src_height = gdk_pixbuf_get_height(src_pixbuf); + + g_return_if_fail(src_x >= 0 && width <= src_width); + g_return_if_fail(src_y >= 0 && height <= src_height); + + /* Ensure that we have a destination pixbuf, and that the + * requested area is not larger than that pixbuf. + */ + g_return_if_fail(dest_pixbuf != NULL); + + dest_width = gdk_pixbuf_get_width(dest_pixbuf); + dest_height = gdk_pixbuf_get_height(dest_pixbuf); + + g_return_if_fail(dest_x >= 0 && width <= dest_width); + g_return_if_fail(dest_y >= 0 && height <= dest_height); + + /* Scale 1:1 the source pixbuf into the destination pixbuf. */ + gdk_pixbuf_scale(src_pixbuf, + dest_pixbuf, + dest_x, dest_y, + width, height, + (double)(dest_x - src_x), + (double)(dest_y - src_y), + 1., 1., ART_FILTER_NEAREST); +} |