* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* 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 <X11/Xlib.h>
-#include <X11/Xos.h>
-#include "gdk.h"
-#include "gdkprivate.h"
+/*
+ * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
+ * file for a list of people on the GTK+ Team. See the ChangeLog
+ * files for a list of changes. These files are distributed with
+ * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
+ */
+
+#include "gdkdrawable.h"
+#include "gdkinternals.h"
+#include "gdkwindow.h"
+
+static GdkDrawable* gdk_drawable_real_get_composite_drawable (GdkDrawable *drawable,
+ gint x,
+ gint y,
+ gint width,
+ gint height,
+ gint *composite_x_offset,
+ gint *composite_y_offset);
+static GdkRegion * gdk_drawable_real_get_visible_region (GdkDrawable *drawable);
+
+static void gdk_drawable_class_init (GdkDrawableClass *klass);
+
+GType
+gdk_drawable_get_type (void)
+{
+ static GType object_type = 0;
+
+ if (!object_type)
+ {
+ static const GTypeInfo object_info =
+ {
+ sizeof (GdkDrawableClass),
+ (GBaseInitFunc) NULL,
+ (GBaseFinalizeFunc) NULL,
+ (GClassInitFunc) gdk_drawable_class_init,
+ NULL, /* class_finalize */
+ NULL, /* class_data */
+ sizeof (GdkDrawable),
+ 0, /* n_preallocs */
+ (GInstanceInitFunc) NULL,
+ };
+
+ object_type = g_type_register_static (G_TYPE_OBJECT,
+ "GdkDrawable",
+ &object_info, 0);
+ }
+
+ return object_type;
+}
+
+static void
+gdk_drawable_class_init (GdkDrawableClass *klass)
+{
+ klass->get_composite_drawable = gdk_drawable_real_get_composite_drawable;
+ /* Default implementation for clip and visible region is the same */
+ klass->get_clip_region = gdk_drawable_real_get_visible_region;
+ klass->get_visible_region = gdk_drawable_real_get_visible_region;
+}
+/* Manipulation of drawables
+ */
+
+/**
+ * gdk_drawable_set_data:
+ * @drawable: a #GdkDrawable
+ * @key: name to store the data under
+ * @data: arbitrary data
+ * @destroy_func: function to free @data, or %NULL
+ *
+ * This function is equivalent to g_object_set_data(),
+ * the #GObject variant should be used instead.
+ *
+ **/
+void
+gdk_drawable_set_data (GdkDrawable *drawable,
+ const gchar *key,
+ gpointer data,
+ GDestroyNotify destroy_func)
+{
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
+
+ g_object_set_qdata_full (G_OBJECT (drawable),
+ g_quark_from_string (key),
+ data,
+ destroy_func);
+}
+
+/**
+ * gdk_drawable_get_data:
+ * @drawable: a #GdkDrawable
+ * @key: name the data was stored under
+ *
+ * Equivalent to g_object_get_data(); the #GObject variant should be
+ * used instead.
+ *
+ * Return value: the data stored at @key
+ **/
+gpointer
+gdk_drawable_get_data (GdkDrawable *drawable,
+ const gchar *key)
+{
+ g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
+
+ return g_object_get_qdata (G_OBJECT (drawable),
+ g_quark_try_string (key));
+}
+
+/**
+ * gdk_drawable_get_size:
+ * @drawable: a #GdkDrawable
+ * @width: location to store drawable's width, or %NULL
+ * @height: location to store drawable's height, or %NULL
+ *
+ * Fills *@width and *@height with the size of @drawable.
+ * @width or @height can be %NULL if you only want the other one.
+ *
+ **/
+void
+gdk_drawable_get_size (GdkDrawable *drawable,
+ gint *width,
+ gint *height)
+{
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
+
+ GDK_DRAWABLE_GET_CLASS (drawable)->get_size (drawable, width, height);
+}
+
+/**
+ * gdk_drawable_get_visual:
+ * @drawable: a #GdkDrawable
+ *
+ * Gets the #GdkVisual describing the pixel format of @drawable.
+ *
+ * Return value: a #GdkVisual
+ **/
+GdkVisual*
+gdk_drawable_get_visual (GdkDrawable *drawable)
+{
+ g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
+
+ return GDK_DRAWABLE_GET_CLASS (drawable)->get_visual (drawable);
+}
+
+/**
+ * gdk_drawable_get_depth:
+ * @drawable: a #GdkDrawable
+ *
+ * Obtains the bit depth of the drawable, that is, the number of bits
+ * that make up a pixel in the drawable's visual. Examples are 8 bits
+ * per pixel, 24 bits per pixel, etc.
+ *
+ * Return value: number of bits per pixel
+ **/
+gint
+gdk_drawable_get_depth (GdkDrawable *drawable)
+{
+ g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), 0);
+
+ return GDK_DRAWABLE_GET_CLASS (drawable)->get_depth (drawable);
+}
+
+/**
+ * gdk_drawable_set_colormap:
+ * @drawable: a #GdkDrawable
+ * @colormap: a #GdkColormap
+ *
+ * Sets the colormap associated with @drawable. Normally this will
+ * happen automatically when the drawable is created; you only need to
+ * use this function if the drawable-creating function did not have a
+ * way to determine the colormap, and you then use drawable operations
+ * that require a colormap. The colormap for all drawables and
+ * graphics contexts you intend to use together should match. i.e.
+ * when using a #GdkGC to draw to a drawable, or copying one drawable
+ * to another, the colormaps should match.
+ *
+ **/
+void
+gdk_drawable_set_colormap (GdkDrawable *drawable,
+ GdkColormap *cmap)
+{
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
+
+ GDK_DRAWABLE_GET_CLASS (drawable)->set_colormap (drawable, cmap);
+}
+
+/**
+ * gdk_drawable_get_colormap:
+ * @drawable: a #GdkDrawable
+ *
+ * Gets the colormap for @drawable, if one is set; returns
+ * %NULL otherwise.
+ *
+ * Return value: the colormap, or %NULL
+ **/
+GdkColormap*
+gdk_drawable_get_colormap (GdkDrawable *drawable)
+{
+ g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
+
+ return GDK_DRAWABLE_GET_CLASS (drawable)->get_colormap (drawable);
+}
+
+/**
+ * gdk_drawable_ref:
+ * @drawable: a #GdkDrawable
+ *
+ * Deprecated equivalent of calling g_object_ref() on @drawable.
+ * (Drawables were not objects in previous versions of GDK.)
+ *
+ * Return value: the same @drawable passed in
+ **/
+GdkDrawable*
+gdk_drawable_ref (GdkDrawable *drawable)
+{
+ return (GdkDrawable *) g_object_ref (G_OBJECT (drawable));
+}
+
+/**
+ * gdk_drawable_unref:
+ * @drawable: a #GdkDrawable
+ *
+ * Deprecated equivalent of calling g_object_unref() on @drawable.
+ *
+ **/
+void
+gdk_drawable_unref (GdkDrawable *drawable)
+{
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
+
+ g_object_unref (G_OBJECT (drawable));
+}
+
+/* Drawing
+ */
void
gdk_draw_point (GdkDrawable *drawable,
GdkGC *gc,
gint x,
gint y)
{
- GdkWindowPrivate *drawable_private;
- GdkGCPrivate *gc_private;
+ GdkPoint point;
- g_return_if_fail (drawable != NULL);
- g_return_if_fail (gc != NULL);
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
+ g_return_if_fail (GDK_IS_GC (gc));
- drawable_private = (GdkWindowPrivate*) drawable;
- if (drawable_private->destroyed)
- return;
- gc_private = (GdkGCPrivate*) gc;
-
- XDrawPoint (drawable_private->xdisplay, drawable_private->xwindow,
- gc_private->xgc, x, y);
+ point.x = x;
+ point.y = y;
+
+ GDK_DRAWABLE_GET_CLASS (drawable)->draw_points (drawable, gc, &point, 1);
}
void
gint x2,
gint y2)
{
- GdkWindowPrivate *drawable_private;
- GdkGCPrivate *gc_private;
+ GdkSegment segment;
g_return_if_fail (drawable != NULL);
g_return_if_fail (gc != NULL);
-
- drawable_private = (GdkWindowPrivate*) drawable;
- if (drawable_private->destroyed)
- return;
- gc_private = (GdkGCPrivate*) gc;
-
- XDrawLine (drawable_private->xdisplay, drawable_private->xwindow,
- gc_private->xgc, x1, y1, x2, y2);
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
+ g_return_if_fail (GDK_IS_GC (gc));
+
+ segment.x1 = x1;
+ segment.y1 = y1;
+ segment.x2 = x2;
+ segment.y2 = y2;
+ GDK_DRAWABLE_GET_CLASS (drawable)->draw_segments (drawable, gc, &segment, 1);
}
void
gint y,
gint width,
gint height)
-{
- GdkWindowPrivate *drawable_private;
- GdkGCPrivate *gc_private;
+{
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
+ g_return_if_fail (GDK_IS_GC (gc));
- g_return_if_fail (drawable != NULL);
- g_return_if_fail (gc != NULL);
-
- drawable_private = (GdkWindowPrivate*) drawable;
- if (drawable_private->destroyed)
- return;
- gc_private = (GdkGCPrivate*) gc;
+ if (width < 0 || height < 0)
+ {
+ gint real_width;
+ gint real_height;
+
+ gdk_drawable_get_size (drawable, &real_width, &real_height);
+
+ if (width < 0)
+ width = real_width;
+ if (height < 0)
+ height = real_height;
+ }
- if (width == -1)
- width = drawable_private->width;
- if (height == -1)
- height = drawable_private->height;
-
- if (filled)
- XFillRectangle (drawable_private->xdisplay, drawable_private->xwindow,
- gc_private->xgc, x, y, width, height);
- else
- XDrawRectangle (drawable_private->xdisplay, drawable_private->xwindow,
- gc_private->xgc, x, y, width, height);
+ GDK_DRAWABLE_GET_CLASS (drawable)->draw_rectangle (drawable, gc, filled, x, y,
+ width, height);
}
void
gint height,
gint angle1,
gint angle2)
-{
- GdkWindowPrivate *drawable_private;
- GdkGCPrivate *gc_private;
-
- g_return_if_fail (drawable != NULL);
- g_return_if_fail (gc != NULL);
+{
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
+ g_return_if_fail (GDK_IS_GC (gc));
- drawable_private = (GdkWindowPrivate*) drawable;
- if (drawable_private->destroyed)
- return;
- gc_private = (GdkGCPrivate*) gc;
+ if (width < 0 || height < 0)
+ {
+ gint real_width;
+ gint real_height;
+
+ gdk_drawable_get_size (drawable, &real_width, &real_height);
+
+ if (width < 0)
+ width = real_width;
+ if (height < 0)
+ height = real_height;
+ }
- if (width == -1)
- width = drawable_private->width;
- if (height == -1)
- height = drawable_private->height;
-
- if (filled)
- XFillArc (drawable_private->xdisplay, drawable_private->xwindow,
- gc_private->xgc, x, y, width, height, angle1, angle2);
- else
- XDrawArc (drawable_private->xdisplay, drawable_private->xwindow,
- gc_private->xgc, x, y, width, height, angle1, angle2);
+ GDK_DRAWABLE_GET_CLASS (drawable)->draw_arc (drawable, gc, filled,
+ x, y, width, height, angle1, angle2);
}
void
GdkPoint *points,
gint npoints)
{
- GdkWindowPrivate *drawable_private;
- GdkGCPrivate *gc_private;
- GdkPoint *local_points = points;
- gint local_npoints = npoints;
- gint local_alloc = 0;
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
+ g_return_if_fail (GDK_IS_GC (gc));
- g_return_if_fail (drawable != NULL);
- g_return_if_fail (gc != NULL);
-
- drawable_private = (GdkWindowPrivate*) drawable;
- if (drawable_private->destroyed)
- return;
- gc_private = (GdkGCPrivate*) gc;
-
- if (filled)
- {
- XFillPolygon (drawable_private->xdisplay, drawable_private->xwindow,
- gc_private->xgc, (XPoint*) points, npoints, Complex, CoordModeOrigin);
- }
- else
- {
- if ((points[0].x != points[npoints-1].x) ||
- (points[0].y != points[npoints-1].y))
- {
- local_alloc = 1;
- ++local_npoints;
- local_points = (GdkPoint*) g_malloc (local_npoints * sizeof(GdkPoint));
- memcpy (local_points, points, npoints * sizeof(GdkPoint));
- local_points[npoints].x = points[0].x;
- local_points[npoints].y = points[0].y;
- }
-
- XDrawLines (drawable_private->xdisplay, drawable_private->xwindow,
- gc_private->xgc,
- (XPoint*) local_points, local_npoints,
- CoordModeOrigin);
-
- if (local_alloc)
- g_free (local_points);
- }
+ GDK_DRAWABLE_GET_CLASS (drawable)->draw_polygon (drawable, gc, filled,
+ points, npoints);
}
/* gdk_draw_string
gint y,
const gchar *string)
{
- GdkWindowPrivate *drawable_private;
- GdkFontPrivate *font_private;
- GdkGCPrivate *gc_private;
-
- g_return_if_fail (drawable != NULL);
- g_return_if_fail (font != NULL);
- g_return_if_fail (gc != NULL);
- g_return_if_fail (string != NULL);
-
- drawable_private = (GdkWindowPrivate*) drawable;
- if (drawable_private->destroyed)
- return;
- gc_private = (GdkGCPrivate*) gc;
- font_private = (GdkFontPrivate*) font;
-
- if (font->type == GDK_FONT_FONT)
- {
- XFontStruct *xfont = (XFontStruct *) font_private->xfont;
- XSetFont(drawable_private->xdisplay, gc_private->xgc, xfont->fid);
- if ((xfont->min_byte1 == 0) && (xfont->max_byte1 == 0))
- {
- XDrawString (drawable_private->xdisplay, drawable_private->xwindow,
- gc_private->xgc, x, y, string, strlen (string));
- }
- else
- {
- XDrawString16 (drawable_private->xdisplay, drawable_private->xwindow,
- gc_private->xgc, x, y, (XChar2b *) string,
- strlen (string) / 2);
- }
- }
- else if (font->type == GDK_FONT_FONTSET)
- {
- XFontSet fontset = (XFontSet) font_private->xfont;
- XmbDrawString (drawable_private->xdisplay, drawable_private->xwindow,
- fontset, gc_private->xgc, x, y, string, strlen (string));
- }
- else
- g_error("undefined font type\n");
+ gdk_draw_text (drawable, font, gc, x, y, string, _gdk_font_strlen (font, string));
}
/* gdk_draw_text
const gchar *text,
gint text_length)
{
- GdkWindowPrivate *drawable_private;
- GdkFontPrivate *font_private;
- GdkGCPrivate *gc_private;
-
- g_return_if_fail (drawable != NULL);
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
g_return_if_fail (font != NULL);
- g_return_if_fail (gc != NULL);
+ g_return_if_fail (GDK_IS_GC (gc));
g_return_if_fail (text != NULL);
- drawable_private = (GdkWindowPrivate*) drawable;
- if (drawable_private->destroyed)
- return;
- gc_private = (GdkGCPrivate*) gc;
- font_private = (GdkFontPrivate*) font;
+ GDK_DRAWABLE_GET_CLASS (drawable)->draw_text (drawable, font, gc, x, y, text, text_length);
+}
- if (font->type == GDK_FONT_FONT)
- {
- XFontStruct *xfont = (XFontStruct *) font_private->xfont;
- XSetFont(drawable_private->xdisplay, gc_private->xgc, xfont->fid);
- if ((xfont->min_byte1 == 0) && (xfont->max_byte1 == 0))
- {
- XDrawString (drawable_private->xdisplay, drawable_private->xwindow,
- gc_private->xgc, x, y, text, text_length);
- }
- else
- {
- XDrawString16 (drawable_private->xdisplay, drawable_private->xwindow,
- gc_private->xgc, x, y, (XChar2b *) text, text_length / 2);
- }
- }
- else if (font->type == GDK_FONT_FONTSET)
- {
- XFontSet fontset = (XFontSet) font_private->xfont;
- XmbDrawString (drawable_private->xdisplay, drawable_private->xwindow,
- fontset, gc_private->xgc, x, y, text, text_length);
- }
- else
- g_error("undefined font type\n");
+void
+gdk_draw_text_wc (GdkDrawable *drawable,
+ GdkFont *font,
+ GdkGC *gc,
+ gint x,
+ gint y,
+ const GdkWChar *text,
+ gint text_length)
+{
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
+ g_return_if_fail (font != NULL);
+ g_return_if_fail (GDK_IS_GC (gc));
+ g_return_if_fail (text != NULL);
+
+ GDK_DRAWABLE_GET_CLASS (drawable)->draw_text_wc (drawable, font, gc, x, y, text, text_length);
}
void
-gdk_draw_pixmap (GdkDrawable *drawable,
- GdkGC *gc,
- GdkPixmap *src,
- gint xsrc,
- gint ysrc,
- gint xdest,
- gint ydest,
- gint width,
- gint height)
+gdk_draw_drawable (GdkDrawable *drawable,
+ GdkGC *gc,
+ GdkDrawable *src,
+ gint xsrc,
+ gint ysrc,
+ gint xdest,
+ gint ydest,
+ gint width,
+ gint height)
{
- GdkWindowPrivate *drawable_private;
- GdkWindowPrivate *src_private;
- GdkGCPrivate *gc_private;
+ GdkDrawable *composite;
+ gint composite_x_offset = 0;
+ gint composite_y_offset = 0;
- g_return_if_fail (drawable != NULL);
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
g_return_if_fail (src != NULL);
- g_return_if_fail (gc != NULL);
+ g_return_if_fail (GDK_IS_GC (gc));
- drawable_private = (GdkWindowPrivate*) drawable;
- src_private = (GdkWindowPrivate*) src;
- if (drawable_private->destroyed || src_private->destroyed)
- return;
- gc_private = (GdkGCPrivate*) gc;
+ if (width < 0 || height < 0)
+ {
+ gint real_width;
+ gint real_height;
+
+ gdk_drawable_get_size (src, &real_width, &real_height);
+
+ if (width < 0)
+ width = real_width;
+ if (height < 0)
+ height = real_height;
+ }
- if (width == -1)
- width = src_private->width;
- if (height == -1)
- height = src_private->height;
-
- XCopyArea (drawable_private->xdisplay,
- src_private->xwindow,
- drawable_private->xwindow,
- gc_private->xgc,
- xsrc, ysrc,
- width, height,
- xdest, ydest);
+
+ composite =
+ GDK_DRAWABLE_GET_CLASS (src)->get_composite_drawable (src,
+ xsrc, ysrc,
+ width, height,
+ &composite_x_offset,
+ &composite_y_offset);
+
+
+ GDK_DRAWABLE_GET_CLASS (drawable)->draw_drawable (drawable, gc, composite,
+ xsrc - composite_x_offset,
+ ysrc - composite_y_offset,
+ xdest, ydest,
+ width, height);
+
+ g_object_unref (G_OBJECT (composite));
}
void
gint width,
gint height)
{
- GdkImagePrivate *image_private;
-
- g_return_if_fail (drawable != NULL);
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
g_return_if_fail (image != NULL);
- g_return_if_fail (gc != NULL);
-
- image_private = (GdkImagePrivate*) image;
-
- g_return_if_fail (image_private->image_put != NULL);
+ g_return_if_fail (GDK_IS_GC (gc));
if (width == -1)
width = image->width;
if (height == -1)
height = image->height;
- (* image_private->image_put) (drawable, gc, image, xsrc, ysrc,
- xdest, ydest, width, height);
+ GDK_DRAWABLE_GET_CLASS (drawable)->draw_image (drawable, gc, image, xsrc, ysrc,
+ xdest, ydest, width, height);
}
void
GdkPoint *points,
gint npoints)
{
- GdkWindowPrivate *drawable_private;
- GdkGCPrivate *gc_private;
-
- g_return_if_fail (drawable != NULL);
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
g_return_if_fail ((points != NULL) && (npoints > 0));
- g_return_if_fail (gc != NULL);
+ g_return_if_fail (GDK_IS_GC (gc));
+ g_return_if_fail (npoints >= 0);
- drawable_private = (GdkWindowPrivate*) drawable;
- if (drawable_private->destroyed)
+ if (npoints == 0)
return;
- gc_private = (GdkGCPrivate*) gc;
-
- XDrawPoints (drawable_private->xdisplay,
- drawable_private->xwindow,
- gc_private->xgc,
- (XPoint *) points,
- npoints,
- CoordModeOrigin);
+
+ GDK_DRAWABLE_GET_CLASS (drawable)->draw_points (drawable, gc, points, npoints);
}
void
GdkSegment *segs,
gint nsegs)
{
- GdkWindowPrivate *drawable_private;
- GdkGCPrivate *gc_private;
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
- if (nsegs <= 0)
+ if (nsegs == 0)
return;
- g_return_if_fail (drawable != NULL);
g_return_if_fail (segs != NULL);
- g_return_if_fail (gc != NULL);
-
- drawable_private = (GdkWindowPrivate*) drawable;
- if (drawable_private->destroyed)
- return;
- gc_private = (GdkGCPrivate*) gc;
+ g_return_if_fail (GDK_IS_GC (gc));
+ g_return_if_fail (nsegs >= 0);
- XDrawSegments (drawable_private->xdisplay,
- drawable_private->xwindow,
- gc_private->xgc,
- (XSegment *) segs,
- nsegs);
+ GDK_DRAWABLE_GET_CLASS (drawable)->draw_segments (drawable, gc, segs, nsegs);
}
void
gdk_draw_lines (GdkDrawable *drawable,
- GdkGC *gc,
- GdkPoint *points,
- gint npoints)
+ GdkGC *gc,
+ GdkPoint *points,
+ gint npoints)
{
- GdkWindowPrivate *drawable_private;
- GdkGCPrivate *gc_private;
- if (npoints <= 0)
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
+ g_return_if_fail (points != NULL);
+ g_return_if_fail (GDK_IS_GC (gc));
+ g_return_if_fail (npoints >= 0);
+
+ if (npoints == 0)
return;
- g_return_if_fail (drawable != NULL);
- g_return_if_fail (points != NULL);
- g_return_if_fail (gc != NULL);
+ GDK_DRAWABLE_GET_CLASS (drawable)->draw_lines (drawable, gc, points, npoints);
+}
+
+void
+gdk_draw_glyphs (GdkDrawable *drawable,
+ GdkGC *gc,
+ PangoFont *font,
+ gint x,
+ gint y,
+ PangoGlyphString *glyphs)
+{
+ g_return_if_fail (GDK_IS_DRAWABLE (drawable));
+ g_return_if_fail (GDK_IS_GC (gc));
+
+
+ GDK_DRAWABLE_GET_CLASS (drawable)->draw_glyphs (drawable, gc, font, x, y, glyphs);
+}
+
+
+/**
+ * gdk_drawable_get_image:
+ * @drawable: a #GdkDrawable
+ * @x: x coordinate on @drawable
+ * @y: y coordinate on @drawable
+ * @width: width of region to get
+ * @height: height or region to get
+ *
+ * A #GdkImage stores client-side image data (pixels). In contrast,
+ * #GdkPixmap and #GdkWindow are server-side
+ * objects. gdk_drawable_get_image() obtains the pixels from a
+ * server-side drawable as a client-side #GdkImage. The format of a
+ * #GdkImage depends on the #GdkVisual of the current display, which
+ * makes manipulating #GdkImage extremely difficult; therefore, in
+ * most cases you should use gdk_pixbuf_get_from_drawable() instead of
+ * this lower-level function. A #GdkPixbuf contains image data in a
+ * canonicalized RGB format, rather than a display-dependent format.
+ * Of course, there's a convenience vs. speed tradeoff here, so you'll
+ * want to think about what makes sense for your application.
+ *
+ * @x, @y, @width, and @height define the region of @drawable to
+ * obtain as an image.
+ *
+ * You would usually copy image data to the client side if you intend
+ * to examine the values of individual pixels, for example to darken
+ * an image or add a red tint. It would be prohibitively slow to
+ * make a round-trip request to the windowing system for each pixel,
+ * so instead you get all of them at once, modify them, then copy
+ * them all back at once.
+ *
+ * If the X server or other windowing system backend is on the local
+ * machine, this function may use shared memory to avoid copying
+ * the image data.
+ *
+ * Return value: a #GdkImage containing the contents of @drawable
+ **/
+GdkImage*
+gdk_drawable_get_image (GdkDrawable *drawable,
+ gint x,
+ gint y,
+ gint width,
+ gint height)
+{
+ GdkDrawable *composite;
+ gint composite_x_offset = 0;
+ gint composite_y_offset = 0;
+ GdkImage *retval;
+
+ g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
+ g_return_val_if_fail (x >= 0, NULL);
+ g_return_val_if_fail (y >= 0, NULL);
+
+ /* FIXME? Note race condition since we get the size then
+ * get the image, and the size may have changed.
+ */
+
+ if (width < 0 || height < 0)
+ gdk_drawable_get_size (drawable,
+ width < 0 ? &width : NULL,
+ height < 0 ? &height : NULL);
+
+ composite =
+ GDK_DRAWABLE_GET_CLASS (drawable)->get_composite_drawable (drawable,
+ x, y,
+ width, height,
+ &composite_x_offset,
+ &composite_y_offset);
+
+ retval = GDK_DRAWABLE_GET_CLASS (composite)->get_image (composite,
+ x - composite_x_offset,
+ y - composite_y_offset,
+ width, height);
+
+ g_object_unref (G_OBJECT (composite));
+
+ return retval;
+}
+
+static GdkDrawable*
+gdk_drawable_real_get_composite_drawable (GdkDrawable *drawable,
+ gint x,
+ gint y,
+ gint width,
+ gint height,
+ gint *composite_x_offset,
+ gint *composite_y_offset)
+{
+ g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
+
+ *composite_x_offset = 0;
+ *composite_y_offset = 0;
+
+ return GDK_DRAWABLE (g_object_ref (G_OBJECT (drawable)));
+}
+
+/**
+ * gdk_drawable_get_clip_region:
+ * @drawable: a #GdkDrawable
+ *
+ * Computes the region of a drawable that potentially can be written
+ * to by drawing primitives. This region will not take into account
+ * the clip region for the GC, and may also not take into account
+ * other factors such as if the window is obscured by other windows,
+ * but no area outside of this region will be affected by drawing
+ * primitives.
+ *
+ * Return value: a #GdkRegion. This must be freed with gdk_region_destroy()
+ * when you are done.
+ **/
+GdkRegion *
+gdk_drawable_get_clip_region (GdkDrawable *drawable)
+{
+ g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
+
+ return GDK_DRAWABLE_GET_CLASS (drawable)->get_clip_region (drawable);
+}
+
+/**
+ * gdk_drawable_get_visible_region:
+ * @drawable:
+ *
+ * Computes the region of a drawable that is potentially visible.
+ * This does not necessarily take into account if the window is
+ * obscured by other windows, but no area outside of this region
+ * is visible.
+ *
+ * Return value: a #GdkRegion. This must be freed with gdk_region_destroy()
+ * when you are done.
+ **/
+GdkRegion *
+gdk_drawable_get_visible_region (GdkDrawable *drawable)
+{
+ g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
+
+ return GDK_DRAWABLE_GET_CLASS (drawable)->get_visible_region (drawable);
+}
+
+static GdkRegion *
+gdk_drawable_real_get_visible_region (GdkDrawable *drawable)
+{
+ GdkRectangle rect;
+
+ rect.x = 0;
+ rect.y = 0;
- drawable_private = (GdkWindowPrivate*) drawable;
- gc_private = (GdkGCPrivate*) gc;
+ gdk_drawable_get_size (drawable, &rect.width, &rect.height);
- XDrawLines (drawable_private->xdisplay,
- drawable_private->xwindow,
- gc_private->xgc,
- (XPoint *) points,
- npoints,
- CoordModeOrigin);
+ return gdk_region_rectangle (&rect);
}
projects / ~andy / gtk / blobdiff