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authorArturo Espinosa <unammx@src.gnome.org>1999-10-07 05:11:27 +0000
committerArturo Espinosa <unammx@src.gnome.org>1999-10-07 05:11:27 +0000
commite29e536d202b83027cec8c2b9c0b69ec4d79b8ee (patch)
tree941e5ec572be5c31ee028241808c3fdc21c2feee /gdk/gdkpixbuf-drawable.c
parent4f771b6d26c0877933badc401fdb77b8f3a6f4ee (diff)
downloadgtk+-e29e536d202b83027cec8c2b9c0b69ec4d79b8ee.tar.gz
Added files from Cody Russell
Diffstat (limited to 'gdk/gdkpixbuf-drawable.c')
-rw-r--r--gdk/gdkpixbuf-drawable.c135
1 files changed, 135 insertions, 0 deletions
diff --git a/gdk/gdkpixbuf-drawable.c b/gdk/gdkpixbuf-drawable.c
new file mode 100644
index 0000000000..472424a5b2
--- /dev/null
+++ b/gdk/gdkpixbuf-drawable.c
@@ -0,0 +1,135 @@
+/*
+ * creates an ArtPixBuf from a Drawable
+ *
+ * Author:
+ * Cody Russell <bratsche@dfw.net>
+ */
+#include <config.h>
+#include <stdio.h>
+#include <string.h>
+#include <glib.h>
+#include <gmodule.h>
+#include "gdk-pixbuf.h"
+
+/* private function */
+
+static ArtPixBuf *
+art_pixbuf_from_drawable_core (GdkWindow *window,
+ gint x, gint y,
+ gint width, gint height,
+ gint with_alpha)
+{
+ GdkImage *image;
+ ArtPixBuf *pixbuf;
+ GdkColormap *colormap;
+ art_u8 *buff;
+ art_u8 *pixels;
+ gulong pixel;
+ gint rowstride;
+ art_u8 r, g, b;
+ gint xx, yy;
+ gint fatness;
+
+ g_return_val_if_fail (window != NULL, NULL);
+
+ image = gdk_image_get (window, x, y, width, height);
+ colormap = gdk_rgb_get_cmap ();
+
+ fatness = with_alpha ? 4 : 3;
+ rowstride = width * fatness;
+
+ buff = art_alloc (rowstride * height);
+ pixels = buff;
+
+ switch (image->depth)
+ {
+ case 0:
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ case 6:
+ case 7:
+ case 8:
+ for (yy = 0; yy < height; yy++)
+ {
+ for (xx = 0; xx < width; xx++)
+ {
+ pixel = gdk_image_get_pixel (image, xx, yy);
+ pixels[0] = colormap->colors[pixel].red;
+ pixels[1] = colormap->colors[pixel].green;
+ pixels[2] = colormap->colors[pixel].blue;
+ if (with_alpha)
+ pixels[3] = 0;
+ pixels += fatness;
+
+ }
+ }
+ break;
+
+ case 16:
+ case 15:
+ for (yy = 0; yy < height; yy++)
+ {
+ for (xx = 0; xx < width; xx++)
+ {
+ pixel = gdk_image_get_pixel (image, xx, yy);
+ r = (pixel >> 8) & 0xf8;
+ g = (pixel >> 3) & 0xfc;
+ b = (pixel << 3) & 0xf8;
+ pixels[0] = r;
+ pixels[1] = g;
+ pixels[2] = b;
+ if (with_alpha)
+ pixels[3] = 0; /* GdkImages don't have alpha =) */
+ pixels += fatness;
+ }
+ }
+ break;
+
+ case 24:
+ case 32:
+ for (yy = 0; yy < height; yy++)
+ {
+ for (xx = 0; xx < width; xx++)
+ {
+ pixel = gdk_image_get_pixel (image, xx, yy);
+ r = (pixel >> 16) & 0xff;
+ g = (pixel >> 8) & 0xff;
+ b = pixel & 0xff;
+ pixels[0] = r;
+ pixels[1] = g;
+ pixels[2] = b;
+ if (with_alpha)
+ pixels[3] = 0; /* GdkImages don't have alpha.. */
+ pixels += fatness;
+ }
+ }
+ break;
+
+ default:
+ g_error ("art_pixbuf_from_drawable_core (): Unknown depth.");
+ }
+
+ return with_alpha ? art_pixbuf_new_rgba (buff, width, height, rowstride) :
+ art_pixbuf_new_rgb (buff, width, height, rowstride);
+}
+
+/* Public functions */
+
+ArtPixBuf *
+art_pixbuf_rgb_from_drawable (GdkWindow *window,
+ gint x, gint y,
+ gint width, gint height)
+{
+ return art_pixbuf_from_drawable_core (window, x, y, width, height, 0);
+}
+
+ArtPixBuf *
+art_pixbuf_rgba_from_drawable (GdkWindow *window,
+ gint x, gint y,
+ gint width, gint height)
+{
+ return art_pixbuf_from_drawable_core (window, x, y, width, height, 1);
+}