* Author: Federico Mena-Quintero <federico@gimp.org>
*
* This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
+ * modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
- * Library General Public License for more details.
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU Library General Public
+ * You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
-#include <config.h>
+#include "config.h"
#include <gdk/gdk.h>
-#include <libart_lgpl/art_rect.h>
-#include "gdk-pixbuf.h"
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include "gdkpixbuf.h"
+#include "gdkscreen.h"
+#include "gdkinternals.h"
+#include "gdkalias.h"
\f
* @src_y: source Y coordinate.
* @dest_x: Destination X coordinate.
* @dest_y: Destination Y coordinate.
- * @width: Width of region to threshold.
- * @height: Height of region to threshold.
+ * @width: Width of region to threshold, or -1 to use pixbuf width
+ * @height: Height of region to threshold, or -1 to use pixbuf height
* @alpha_threshold: Opacity values below this will be painted as zero; all
* other values will be painted as one.
- *
- * Takes the opacity values in a pixbuf and thresholds them to produce a
- * bi-level alpha mask that can be used as a clipping mask for a drawable.
+ *
+ * Takes the opacity values in a rectangular portion of a pixbuf and thresholds
+ * them to produce a bi-level alpha mask that can be used as a clipping mask for
+ * a drawable.
+ *
**/
void
-gdk_pixbuf_render_threshold_alpha (GdkPixbuf *pixbuf, GdkBitmap *bitmap,
- int src_x, int src_y,
+gdk_pixbuf_render_threshold_alpha (GdkPixbuf *pixbuf,
+ GdkBitmap *bitmap,
+ int src_x, int src_y,
int dest_x, int dest_y,
- int width, int height,
+ int width, int height,
int alpha_threshold)
{
- ArtPixBuf *apb;
- GdkGC *gc;
- GdkColor color;
- int x, y;
- guchar *p;
- int start, start_status;
- int status;
-
- g_return_if_fail (pixbuf != NULL);
- apb = pixbuf->art_pixbuf;
-
- g_return_if_fail (apb->format == ART_PIX_RGB);
- g_return_if_fail (apb->n_channels == 3 || apb->n_channels == 4);
- g_return_if_fail (apb->bits_per_sample == 8);
-
- g_return_if_fail (bitmap != NULL);
- g_return_if_fail (src_x >= 0 && src_x + width <= apb->width);
- g_return_if_fail (src_y >= 0 && src_y + height <= apb->height);
-
- g_return_if_fail (alpha_threshold >= 0 && alpha_threshold <= 255);
-
- gc = gdk_gc_new (bitmap);
-
- if (!apb->has_alpha) {
- color.pixel = (alpha_threshold == 255) ? 0 : 1;
- gdk_gc_set_foreground (gc, &color);
- gdk_draw_rectangle (bitmap, gc, TRUE, dest_x, dest_y, width, height);
- gdk_gc_unref (gc);
- return;
- }
+ GdkGC *gc;
+ GdkColor color;
+ int x, y;
+ guchar *p;
+ int start, start_status;
+ int status;
+
+ g_return_val_if_fail (gdk_pixbuf_get_colorspace (pixbuf) == GDK_COLORSPACE_RGB, NULL);
+ g_return_val_if_fail (gdk_pixbuf_get_n_channels (pixbuf) == 3 ||
+ gdk_pixbuf_get_n_channels (pixbuf) == 4, NULL);
+ g_return_val_if_fail (gdk_pixbuf_get_bits_per_sample (pixbuf) == 8, NULL);
- color.pixel = 0;
- gdk_gc_set_foreground (gc, &color);
- gdk_draw_rectangle (bitmap, gc, TRUE, dest_x, dest_y, width, height);
+ if (width == -1)
+ width = gdk_pixbuf_get_width (pixbuf);
+ if (height == -1)
+ height = gdk_pixbuf_get_height (pixbuf);
- for (y = 0; y < height; y++) {
- p = (apb->pixels + (y + src_y) * apb->rowstride + src_x * apb->n_channels
- + apb->n_channels - 1);
+ g_return_if_fail (bitmap != NULL);
+ g_return_if_fail (width >= 0 && height >= 0);
+ g_return_if_fail (src_x >= 0 && src_x + width <= gdk_pixbuf_get_width (pixbuf));
+ g_return_if_fail (src_y >= 0 && src_y + height <= gdk_pixbuf_get_height (pixbuf));
- start = 0;
- start_status = *p < alpha_threshold;
+ g_return_if_fail (alpha_threshold >= 0 && alpha_threshold <= 255);
- for (x = 0; x < width; x++) {
- status = *p < alpha_threshold;
+ if (width == 0 || height == 0)
+ return;
- if (status != start_status) {
- color.pixel = start_status ? 0 : 1;
- gdk_gc_set_foreground (gc, &color);
- gdk_draw_line (bitmap, gc,
- start + dest_x, y + dest_y,
- x - 1 + dest_x, y + dest_y);
+ gc = _gdk_drawable_get_scratch_gc (bitmap, FALSE);
- start = x;
- start_status = status;
- }
+ if (!gdk_pixbuf_get_has_alpha (pixbuf))
+ {
+ color.pixel = (alpha_threshold == 255) ? 0 : 1;
+ gdk_gc_set_foreground (gc, &color);
+ gdk_draw_rectangle (bitmap, gc, TRUE, dest_x, dest_y, width, height);
+ return;
+ }
- p += apb->n_channels;
- }
+ color.pixel = 0;
+ gdk_gc_set_foreground (gc, &color);
+ gdk_draw_rectangle (bitmap, gc, TRUE, dest_x, dest_y, width, height);
- color.pixel = start_status ? 0 : 1;
- gdk_gc_set_foreground (gc, &color);
+ color.pixel = 1;
+ gdk_gc_set_foreground (gc, &color);
+
+ for (y = 0; y < height; y++)
+ {
+ p = (gdk_pixbuf_get_pixels (pixbuf) + (y + src_y) * gdk_pixbuf_get_rowstride (pixbuf) + src_x * gdk_pixbuf_get_n_channels (pixbuf)
+ + gdk_pixbuf_get_n_channels (pixbuf) - 1);
+
+ start = 0;
+ start_status = *p < alpha_threshold;
+
+ for (x = 0; x < width; x++)
+ {
+ status = *p < alpha_threshold;
+
+ if (status != start_status)
+ {
+ if (!start_status)
gdk_draw_line (bitmap, gc,
start + dest_x, y + dest_y,
x - 1 + dest_x, y + dest_y);
+
+ start = x;
+ start_status = status;
+ }
+
+ p += gdk_pixbuf_get_n_channels (pixbuf);
}
+
+ if (!start_status)
+ gdk_draw_line (bitmap, gc,
+ start + dest_x, y + dest_y,
+ x - 1 + dest_x, y + dest_y);
+ }
+}
- gdk_gc_unref (gc);
+/**
+ * gdk_pixbuf_render_pixmap_and_mask:
+ * @pixbuf: A pixbuf.
+ * @pixmap_return: Location to store a pointer to the created pixmap,
+ * or %NULL if the pixmap is not needed.
+ * @mask_return: Location to store a pointer to the created mask,
+ * or %NULL if the mask is not needed.
+ * @alpha_threshold: Threshold value for opacity values.
+ *
+ * Creates a pixmap and a mask bitmap which are returned in the @pixmap_return
+ * and @mask_return arguments, respectively, and renders a pixbuf and its
+ * corresponding thresholded alpha mask to them. This is merely a convenience
+ * function; applications that need to render pixbufs with dither offsets or to
+ * given drawables should use gdk_draw_pixbuf() and gdk_pixbuf_render_threshold_alpha().
+ *
+ * The pixmap that is created is created for the colormap returned
+ * by gdk_rgb_get_colormap(). You normally will want to instead use
+ * the actual colormap for a widget, and use
+ * gdk_pixbuf_render_pixmap_and_mask_for_colormap().
+ *
+ * If the pixbuf does not have an alpha channel, then *@mask_return will be set
+ * to %NULL.
+ **/
+void
+gdk_pixbuf_render_pixmap_and_mask (GdkPixbuf *pixbuf,
+ GdkPixmap **pixmap_return,
+ GdkBitmap **mask_return,
+ int alpha_threshold)
+{
+ gdk_pixbuf_render_pixmap_and_mask_for_colormap (pixbuf,
+ gdk_rgb_get_colormap (),
+ pixmap_return, mask_return,
+ alpha_threshold);
}
+/**
+ * gdk_pixbuf_render_pixmap_and_mask_for_colormap:
+ * @pixbuf: A pixbuf.
+ * @colormap: A #GdkColormap
+ * @pixmap_return: Location to store a pointer to the created pixmap,
+ * or %NULL if the pixmap is not needed.
+ * @mask_return: Location to store a pointer to the created mask,
+ * or %NULL if the mask is not needed.
+ * @alpha_threshold: Threshold value for opacity values.
+ *
+ * Creates a pixmap and a mask bitmap which are returned in the @pixmap_return
+ * and @mask_return arguments, respectively, and renders a pixbuf and its
+ * corresponding tresholded alpha mask to them. This is merely a convenience
+ * function; applications that need to render pixbufs with dither offsets or to
+ * given drawables should use gdk_draw_pixbuf(), and gdk_pixbuf_render_threshold_alpha().
+ *
+ * The pixmap that is created uses the #GdkColormap specified by @colormap.
+ * This colormap must match the colormap of the window where the pixmap
+ * will eventually be used or an error will result.
+ *
+ * If the pixbuf does not have an alpha channel, then *@mask_return will be set
+ * to %NULL.
+ **/
void
-gdk_pixbuf_render_to_drawable (GdkPixbuf *pixbuf, GdkDrawable *drawable,
- int src_x, int src_y,
- int dest_x, int dest_y,
- int width, int height,
- GdkPixbufAlphaMode alpha_mode,
- int alpha_threshold,
- GdkRgbDither dither,
- int x_dither, int y_dither)
+gdk_pixbuf_render_pixmap_and_mask_for_colormap (GdkPixbuf *pixbuf,
+ GdkColormap *colormap,
+ GdkPixmap **pixmap_return,
+ GdkBitmap **mask_return,
+ int alpha_threshold)
{
- ArtPixBuf *apb;
- ArtIRect dest_rect, req_rect, area_rect;
- GdkBitmap *bitmap;
- GdkGC *gc;
- guchar *buf;
- int rowstride;
-
- g_return_if_fail (pixbuf != NULL);
- apb = pixbuf->art_pixbuf;
-
- g_return_if_fail (apb->format == ART_PIX_RGB);
- g_return_if_fail (apb->n_channels == 3 || apb->n_channels == 4);
- g_return_if_fail (apb->bits_per_sample == 8);
-
- g_return_if_fail (drawable != NULL);
- g_return_if_fail (src_x >= 0 && src_x + width <= apb->width);
- g_return_if_fail (src_y >= 0 && src_y + height <= apb->height);
-
- gc = gdk_gc_new (drawable);
-
- if (apb->has_alpha) {
- /* Right now we only support GDK_PIXBUF_ALPHA_BILEVEL, so we
- * unconditionally create the clipping mask.
- */
-
- bitmap = gdk_pixmap_new (NULL, width, height, 1);
- gdk_pixbuf_render_threshold_alpha (pixbuf, bitmap,
- src_x, src_y,
- 0, 0,
- width, height,
- alpha_threshold);
-
- gdk_gc_set_clip_mask (gc, bitmap);
- gdk_gc_set_clip_origin (gc, dest_x, dest_y);
- }
+ GdkScreen *screen;
- /* Sigh, GdkRGB does not have gdk_draw_rgb_32_image_dithalign(), so we
- * have to pack the buffer first.
- */
- if (apb->has_alpha) {
-// buf = remove_alpha (apb, src_x, src_y, width, height, &rowstride);
- } else {
- buf = apb->pixels + src_y * apb->rowstride + src_x * 3;
- rowstride = apb->rowstride;
+ g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
+ g_return_if_fail (GDK_IS_COLORMAP (colormap));
+
+ screen = gdk_colormap_get_screen (colormap);
+
+ if (pixmap_return)
+ {
+ GdkGC *gc;
+ *pixmap_return = gdk_pixmap_new (gdk_screen_get_root_window (screen),
+ gdk_pixbuf_get_width (pixbuf), gdk_pixbuf_get_height (pixbuf),
+ gdk_colormap_get_visual (colormap)->depth);
+
+ gdk_drawable_set_colormap (GDK_DRAWABLE (*pixmap_return), colormap);
+ gc = _gdk_drawable_get_scratch_gc (*pixmap_return, FALSE);
+
+ /* If the pixbuf has an alpha channel, using gdk_pixbuf_draw would give
+ * random pixel values in the area that are within the mask, but semi-
+ * transparent. So we treat the pixbuf like a pixbuf without alpha channel;
+ * see bug #487865.
+ */
+ if (gdk_pixbuf_get_has_alpha (pixbuf))
+ gdk_draw_rgb_32_image (*pixmap_return, gc,
+ 0, 0,
+ gdk_pixbuf_get_width (pixbuf), gdk_pixbuf_get_height (pixbuf),
+ GDK_RGB_DITHER_NORMAL,
+ gdk_pixbuf_get_pixels (pixbuf), gdk_pixbuf_get_rowstride (pixbuf));
+ else
+ gdk_draw_pixbuf (*pixmap_return, gc, pixbuf,
+ 0, 0, 0, 0,
+ gdk_pixbuf_get_width (pixbuf), gdk_pixbuf_get_height (pixbuf),
+ GDK_RGB_DITHER_NORMAL,
+ 0, 0);
+ }
+
+ if (mask_return)
+ {
+ if (gdk_pixbuf_get_has_alpha (pixbuf))
+ {
+ *mask_return = gdk_pixmap_new (gdk_screen_get_root_window (screen),
+ gdk_pixbuf_get_width (pixbuf), gdk_pixbuf_get_height (pixbuf), 1);
+
+ gdk_pixbuf_render_threshold_alpha (pixbuf, *mask_return,
+ 0, 0, 0, 0,
+ gdk_pixbuf_get_width (pixbuf), gdk_pixbuf_get_height (pixbuf),
+ alpha_threshold);
}
+ else
+ *mask_return = NULL;
+ }
}
+
+#define __GDK_PIXBUF_RENDER_C__
+#include "gdkaliasdef.c"
+
projects / ~andy / gtk / blobdiff