forked from AuroraMiddleware/gtk
1819 lines
52 KiB
C
1819 lines
52 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include <math.h>
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#include <pango/pangocairo.h>
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#include "gdkcairo.h"
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#include "gdkdrawable.h"
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#include "gdkinternals.h"
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#include "gdkwindow.h"
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#include "gdkscreen.h"
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#include "gdk-pixbuf-private.h"
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#include "gdkpixbuf.h"
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#include "gdkalias.h"
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static GdkImage* gdk_drawable_real_get_image (GdkDrawable *drawable,
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gint x,
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gint y,
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gint width,
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gint height);
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static GdkDrawable* gdk_drawable_real_get_composite_drawable (GdkDrawable *drawable,
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gint x,
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gint y,
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gint width,
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gint height,
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gint *composite_x_offset,
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gint *composite_y_offset);
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static GdkRegion * gdk_drawable_real_get_visible_region (GdkDrawable *drawable);
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static void gdk_drawable_real_draw_pixbuf (GdkDrawable *drawable,
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GdkGC *gc,
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GdkPixbuf *pixbuf,
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gint src_x,
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gint src_y,
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gint dest_x,
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gint dest_y,
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gint width,
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gint height,
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GdkRgbDither dither,
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gint x_dither,
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gint y_dither);
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G_DEFINE_ABSTRACT_TYPE (GdkDrawable, gdk_drawable, G_TYPE_OBJECT)
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static void
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gdk_drawable_class_init (GdkDrawableClass *klass)
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{
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klass->get_image = gdk_drawable_real_get_image;
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klass->get_composite_drawable = gdk_drawable_real_get_composite_drawable;
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/* Default implementation for clip and visible region is the same */
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klass->get_clip_region = gdk_drawable_real_get_visible_region;
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klass->get_visible_region = gdk_drawable_real_get_visible_region;
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klass->draw_pixbuf = gdk_drawable_real_draw_pixbuf;
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}
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static void
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gdk_drawable_init (GdkDrawable *drawable)
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{
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}
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/* Manipulation of drawables
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*/
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/**
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* gdk_drawable_set_data:
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* @drawable: a #GdkDrawable
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* @key: name to store the data under
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* @data: arbitrary data
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* @destroy_func: function to free @data, or %NULL
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*
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* This function is equivalent to g_object_set_data(),
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* the #GObject variant should be used instead.
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*
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**/
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void
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gdk_drawable_set_data (GdkDrawable *drawable,
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const gchar *key,
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gpointer data,
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GDestroyNotify destroy_func)
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{
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g_return_if_fail (GDK_IS_DRAWABLE (drawable));
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g_object_set_qdata_full (G_OBJECT (drawable),
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g_quark_from_string (key),
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data,
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destroy_func);
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}
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/**
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* gdk_drawable_get_data:
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* @drawable: a #GdkDrawable
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* @key: name the data was stored under
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*
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* Equivalent to g_object_get_data(); the #GObject variant should be
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* used instead.
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*
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* Return value: the data stored at @key
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**/
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gpointer
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gdk_drawable_get_data (GdkDrawable *drawable,
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const gchar *key)
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{
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g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
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return g_object_get_qdata (G_OBJECT (drawable),
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g_quark_try_string (key));
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}
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/**
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* gdk_drawable_get_size:
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* @drawable: a #GdkDrawable
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* @width: location to store drawable's width, or %NULL
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* @height: location to store drawable's height, or %NULL
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*
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* Fills *@width and *@height with the size of @drawable.
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* @width or @height can be %NULL if you only want the other one.
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*
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* On the X11 platform, if @drawable is a #GdkWindow, the returned
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* size is the size reported in the most-recently-processed configure
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* event, rather than the current size on the X server.
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*
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**/
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void
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gdk_drawable_get_size (GdkDrawable *drawable,
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gint *width,
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gint *height)
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{
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g_return_if_fail (GDK_IS_DRAWABLE (drawable));
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GDK_DRAWABLE_GET_CLASS (drawable)->get_size (drawable, width, height);
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}
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/**
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* gdk_drawable_get_visual:
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* @drawable: a #GdkDrawable
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*
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* Gets the #GdkVisual describing the pixel format of @drawable.
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*
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* Return value: a #GdkVisual
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**/
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GdkVisual*
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gdk_drawable_get_visual (GdkDrawable *drawable)
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{
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g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
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return GDK_DRAWABLE_GET_CLASS (drawable)->get_visual (drawable);
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}
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/**
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* gdk_drawable_get_depth:
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* @drawable: a #GdkDrawable
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*
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* Obtains the bit depth of the drawable, that is, the number of bits
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* that make up a pixel in the drawable's visual. Examples are 8 bits
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* per pixel, 24 bits per pixel, etc.
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*
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* Return value: number of bits per pixel
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**/
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gint
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gdk_drawable_get_depth (GdkDrawable *drawable)
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{
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g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), 0);
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return GDK_DRAWABLE_GET_CLASS (drawable)->get_depth (drawable);
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}
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/**
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* gdk_drawable_get_screen:
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* @drawable: a #GdkDrawable
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*
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* Gets the #GdkScreen associated with a #GdkDrawable.
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*
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* Return value: the #GdkScreen associated with @drawable
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*
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* Since: 2.2
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**/
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GdkScreen*
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gdk_drawable_get_screen(GdkDrawable *drawable)
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{
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g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
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return GDK_DRAWABLE_GET_CLASS (drawable)->get_screen (drawable);
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}
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/**
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* gdk_drawable_get_display:
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* @drawable: a #GdkDrawable
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*
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* Gets the #GdkDisplay associated with a #GdkDrawable.
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*
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* Return value: the #GdkDisplay associated with @drawable
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*
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* Since: 2.2
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**/
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GdkDisplay*
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gdk_drawable_get_display (GdkDrawable *drawable)
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{
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g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
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return gdk_screen_get_display (gdk_drawable_get_screen (drawable));
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}
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/**
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* gdk_drawable_set_colormap:
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* @drawable: a #GdkDrawable
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* @colormap: a #GdkColormap
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*
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* Sets the colormap associated with @drawable. Normally this will
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* happen automatically when the drawable is created; you only need to
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* use this function if the drawable-creating function did not have a
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* way to determine the colormap, and you then use drawable operations
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* that require a colormap. The colormap for all drawables and
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* graphics contexts you intend to use together should match. i.e.
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* when using a #GdkGC to draw to a drawable, or copying one drawable
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* to another, the colormaps should match.
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*
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**/
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void
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gdk_drawable_set_colormap (GdkDrawable *drawable,
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GdkColormap *cmap)
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{
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g_return_if_fail (GDK_IS_DRAWABLE (drawable));
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g_return_if_fail (cmap == NULL || gdk_drawable_get_depth (drawable)
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== cmap->visual->depth);
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GDK_DRAWABLE_GET_CLASS (drawable)->set_colormap (drawable, cmap);
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}
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/**
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* gdk_drawable_get_colormap:
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* @drawable: a #GdkDrawable
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*
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* Gets the colormap for @drawable, if one is set; returns
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* %NULL otherwise.
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*
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* Return value: the colormap, or %NULL
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**/
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GdkColormap*
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gdk_drawable_get_colormap (GdkDrawable *drawable)
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{
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g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
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return GDK_DRAWABLE_GET_CLASS (drawable)->get_colormap (drawable);
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}
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/**
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* gdk_drawable_ref:
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* @drawable: a #GdkDrawable
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*
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* Deprecated equivalent of calling g_object_ref() on @drawable.
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* (Drawables were not objects in previous versions of GDK.)
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*
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* Return value: the same @drawable passed in
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**/
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GdkDrawable*
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gdk_drawable_ref (GdkDrawable *drawable)
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{
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return (GdkDrawable *) g_object_ref (drawable);
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}
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/**
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* gdk_drawable_unref:
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* @drawable: a #GdkDrawable
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*
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* Deprecated equivalent of calling g_object_unref() on @drawable.
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*
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**/
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void
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gdk_drawable_unref (GdkDrawable *drawable)
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{
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g_return_if_fail (GDK_IS_DRAWABLE (drawable));
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g_object_unref (drawable);
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}
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/* Drawing
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*/
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/**
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* gdk_draw_point:
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* @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
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* @gc: a #GdkGC.
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* @x: the x coordinate of the point.
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* @y: the y coordinate of the point.
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*
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* Draws a point, using the foreground color and other attributes of
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* the #GdkGC.
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**/
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void
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gdk_draw_point (GdkDrawable *drawable,
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GdkGC *gc,
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gint x,
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gint y)
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{
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GdkPoint point;
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g_return_if_fail (GDK_IS_DRAWABLE (drawable));
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g_return_if_fail (GDK_IS_GC (gc));
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point.x = x;
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point.y = y;
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GDK_DRAWABLE_GET_CLASS (drawable)->draw_points (drawable, gc, &point, 1);
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}
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/**
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* gdk_draw_line:
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* @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
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* @gc: a #GdkGC.
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* @x1_: the x coordinate of the start point.
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* @y1_: the y coordinate of the start point.
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* @x2_: the x coordinate of the end point.
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* @y2_: the y coordinate of the end point.
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*
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* Draws a line, using the foreground color and other attributes of
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* the #GdkGC.
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**/
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void
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gdk_draw_line (GdkDrawable *drawable,
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GdkGC *gc,
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gint x1,
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gint y1,
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gint x2,
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gint y2)
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{
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GdkSegment segment;
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g_return_if_fail (GDK_IS_DRAWABLE (drawable));
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g_return_if_fail (GDK_IS_GC (gc));
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segment.x1 = x1;
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segment.y1 = y1;
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segment.x2 = x2;
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segment.y2 = y2;
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GDK_DRAWABLE_GET_CLASS (drawable)->draw_segments (drawable, gc, &segment, 1);
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}
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/**
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* gdk_draw_rectangle:
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* @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
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* @gc: a #GdkGC.
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* @filled: %TRUE if the rectangle should be filled.
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* @x: the x coordinate of the left edge of the rectangle.
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* @y: the y coordinate of the top edge of the rectangle.
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* @width: the width of the rectangle.
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* @height: the height of the rectangle.
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*
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* Draws a rectangular outline or filled rectangle, using the foreground color
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* and other attributes of the #GdkGC.
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*
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* A rectangle drawn filled is 1 pixel smaller in both dimensions than a
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* rectangle outlined. Calling
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* <literal>gdk_draw_rectangle (window, gc, TRUE, 0, 0, 20, 20)</literal>
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* results in a filled rectangle 20 pixels wide and 20 pixels high. Calling
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* <literal>gdk_draw_rectangle (window, gc, FALSE, 0, 0, 20, 20)</literal>
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* results in an outlined rectangle with corners at (0, 0), (0, 20), (20, 20),
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* and (20, 0), which makes it 21 pixels wide and 21 pixels high.
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**/
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void
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gdk_draw_rectangle (GdkDrawable *drawable,
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GdkGC *gc,
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gboolean filled,
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gint x,
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gint y,
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gint width,
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gint height)
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{
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g_return_if_fail (GDK_IS_DRAWABLE (drawable));
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g_return_if_fail (GDK_IS_GC (gc));
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if (width < 0 || height < 0)
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{
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gint real_width;
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gint real_height;
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gdk_drawable_get_size (drawable, &real_width, &real_height);
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if (width < 0)
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width = real_width;
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if (height < 0)
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height = real_height;
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}
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GDK_DRAWABLE_GET_CLASS (drawable)->draw_rectangle (drawable, gc, filled, x, y,
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width, height);
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}
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/**
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* gdk_draw_arc:
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* @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
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* @gc: a #GdkGC.
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* @filled: %TRUE if the arc should be filled, producing a 'pie slice'.
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* @x: the x coordinate of the left edge of the bounding rectangle.
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* @y: the y coordinate of the top edge of the bounding rectangle.
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* @width: the width of the bounding rectangle.
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* @height: the height of the bounding rectangle.
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* @angle1: the start angle of the arc, relative to the 3 o'clock position,
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* counter-clockwise, in 1/64ths of a degree.
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* @angle2: the end angle of the arc, relative to @angle1, in 1/64ths
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* of a degree.
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*
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* Draws an arc or a filled 'pie slice'. The arc is defined by the bounding
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* rectangle of the entire ellipse, and the start and end angles of the part
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* of the ellipse to be drawn.
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**/
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void
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gdk_draw_arc (GdkDrawable *drawable,
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GdkGC *gc,
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gboolean filled,
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gint x,
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gint y,
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gint width,
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gint height,
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gint angle1,
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gint angle2)
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{
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g_return_if_fail (GDK_IS_DRAWABLE (drawable));
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g_return_if_fail (GDK_IS_GC (gc));
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if (width < 0 || height < 0)
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{
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gint real_width;
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gint real_height;
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gdk_drawable_get_size (drawable, &real_width, &real_height);
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if (width < 0)
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width = real_width;
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if (height < 0)
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height = real_height;
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}
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GDK_DRAWABLE_GET_CLASS (drawable)->draw_arc (drawable, gc, filled,
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x, y, width, height, angle1, angle2);
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}
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/**
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|
* gdk_draw_polygon:
|
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* @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
|
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* @gc: a #GdkGC.
|
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* @filled: %TRUE if the polygon should be filled. The polygon is closed
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* automatically, connecting the last point to the first point if
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* necessary.
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* @points: an array of #GdkPoint structures specifying the points making
|
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* up the polygon.
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* @n_points: the number of points.
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*
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* Draws an outlined or filled polygon.
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**/
|
|
void
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gdk_draw_polygon (GdkDrawable *drawable,
|
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GdkGC *gc,
|
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gboolean filled,
|
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const GdkPoint *points,
|
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gint n_points)
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{
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g_return_if_fail (GDK_IS_DRAWABLE (drawable));
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g_return_if_fail (GDK_IS_GC (gc));
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GDK_DRAWABLE_GET_CLASS (drawable)->draw_polygon (drawable, gc, filled,
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(GdkPoint *) points,
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n_points);
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}
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|
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/* gdk_draw_string
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|
*
|
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* Modified by Li-Da Lho to draw 16 bits and Multibyte strings
|
|
*
|
|
* Interface changed: add "GdkFont *font" to specify font or fontset explicitely
|
|
*/
|
|
/**
|
|
* gdk_draw_string:
|
|
* @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
|
|
* @font: a #GdkFont.
|
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* @gc: a #GdkGC.
|
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* @x: the x coordinate of the left edge of the text.
|
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* @y: the y coordinate of the baseline of the text.
|
|
* @string: the string of characters to draw.
|
|
*
|
|
* Draws a string of characters in the given font or fontset.
|
|
*
|
|
* Deprecated: Use gdk_draw_layout() instead.
|
|
**/
|
|
void
|
|
gdk_draw_string (GdkDrawable *drawable,
|
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GdkFont *font,
|
|
GdkGC *gc,
|
|
gint x,
|
|
gint y,
|
|
const gchar *string)
|
|
{
|
|
gdk_draw_text (drawable, font, gc, x, y, string, _gdk_font_strlen (font, string));
|
|
}
|
|
|
|
/* gdk_draw_text
|
|
*
|
|
* Modified by Li-Da Lho to draw 16 bits and Multibyte strings
|
|
*
|
|
* Interface changed: add "GdkFont *font" to specify font or fontset explicitely
|
|
*/
|
|
/**
|
|
* gdk_draw_text:
|
|
* @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
|
|
* @font: a #GdkFont.
|
|
* @gc: a #GdkGC.
|
|
* @x: the x coordinate of the left edge of the text.
|
|
* @y: the y coordinate of the baseline of the text.
|
|
* @text: the characters to draw.
|
|
* @text_length: the number of characters of @text to draw.
|
|
*
|
|
* Draws a number of characters in the given font or fontset.
|
|
*
|
|
* Deprecated: Use gdk_draw_layout() instead.
|
|
**/
|
|
void
|
|
gdk_draw_text (GdkDrawable *drawable,
|
|
GdkFont *font,
|
|
GdkGC *gc,
|
|
gint x,
|
|
gint y,
|
|
const gchar *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 (drawable, font, gc, x, y, text, text_length);
|
|
}
|
|
|
|
/**
|
|
* gdk_draw_text_wc:
|
|
* @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
|
|
* @font: a #GdkFont.
|
|
* @gc: a #GdkGC.
|
|
* @x: the x coordinate of the left edge of the text.
|
|
* @y: the y coordinate of the baseline of the text.
|
|
* @text: the wide characters to draw.
|
|
* @text_length: the number of characters to draw.
|
|
*
|
|
* Draws a number of wide characters using the given font of fontset.
|
|
* If the font is a 1-byte font, the string is converted into 1-byte
|
|
* characters (discarding the high bytes) before output.
|
|
*
|
|
* Deprecated: Use gdk_draw_layout() instead.
|
|
**/
|
|
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);
|
|
}
|
|
|
|
/**
|
|
* gdk_draw_drawable:
|
|
* @drawable: a #GdkDrawable
|
|
* @gc: a #GdkGC sharing the drawable's visual and colormap
|
|
* @src: the source #GdkDrawable, which may be the same as @drawable
|
|
* @xsrc: X position in @src of rectangle to draw
|
|
* @ysrc: Y position in @src of rectangle to draw
|
|
* @xdest: X position in @drawable where the rectangle should be drawn
|
|
* @ydest: Y position in @drawable where the rectangle should be drawn
|
|
* @width: width of rectangle to draw, or -1 for entire @src width
|
|
* @height: height of rectangle to draw, or -1 for entire @src height
|
|
*
|
|
* Copies the @width x @height region of @src at coordinates (@xsrc,
|
|
* @ysrc) to coordinates (@xdest, @ydest) in @drawable.
|
|
* @width and/or @height may be given as -1, in which case the entire
|
|
* @src drawable will be copied.
|
|
*
|
|
* Most fields in @gc are not used for this operation, but notably the
|
|
* clip mask or clip region will be honored.
|
|
*
|
|
* The source and destination drawables must have the same visual and
|
|
* colormap, or errors will result. (On X11, failure to match
|
|
* visual/colormap results in a BadMatch error from the X server.)
|
|
* A common cause of this problem is an attempt to draw a bitmap to
|
|
* a color drawable. The way to draw a bitmap is to set the bitmap as
|
|
* the stipple on the #GdkGC, set the fill mode to %GDK_STIPPLED, and
|
|
* then draw the rectangle.
|
|
**/
|
|
void
|
|
gdk_draw_drawable (GdkDrawable *drawable,
|
|
GdkGC *gc,
|
|
GdkDrawable *src,
|
|
gint xsrc,
|
|
gint ysrc,
|
|
gint xdest,
|
|
gint ydest,
|
|
gint width,
|
|
gint height)
|
|
{
|
|
GdkDrawable *composite, *composite_impl;
|
|
gint composite_x_offset = 0;
|
|
gint composite_y_offset = 0;
|
|
|
|
g_return_if_fail (GDK_IS_DRAWABLE (drawable));
|
|
g_return_if_fail (GDK_IS_DRAWABLE (src));
|
|
g_return_if_fail (GDK_IS_GC (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;
|
|
}
|
|
|
|
|
|
composite =
|
|
GDK_DRAWABLE_GET_CLASS (src)->get_composite_drawable (src,
|
|
xsrc, ysrc,
|
|
width, height,
|
|
&composite_x_offset,
|
|
&composite_y_offset);
|
|
|
|
/* The draw_drawable call below is will recurse into gdk_draw_drawable again,
|
|
* specifying the right impl for the destination. This means the composite
|
|
* we got here will be fed to get_composite_drawable again, which is a problem
|
|
* for window as that causes double the composite offset. Avoid this by passing
|
|
* in the impl directly.
|
|
*/
|
|
if (GDK_IS_WINDOW (composite))
|
|
composite_impl = GDK_WINDOW_OBJECT (src)->impl;
|
|
else
|
|
composite_impl = composite;
|
|
|
|
/* TODO: For non-native windows this may copy stuff from other overlapping
|
|
windows. We should clip that and clear that area in the destination instead. */
|
|
|
|
GDK_DRAWABLE_GET_CLASS (drawable)->draw_drawable (drawable, gc, composite_impl,
|
|
xsrc - composite_x_offset,
|
|
ysrc - composite_y_offset,
|
|
xdest, ydest,
|
|
width, height);
|
|
|
|
g_object_unref (composite);
|
|
}
|
|
|
|
/**
|
|
* gdk_draw_image:
|
|
* @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
|
|
* @gc: a #GdkGC.
|
|
* @image: the #GdkImage to draw.
|
|
* @xsrc: the left edge of the source rectangle within @image.
|
|
* @ysrc: the top of the source rectangle within @image.
|
|
* @xdest: the x coordinate of the destination within @drawable.
|
|
* @ydest: the y coordinate of the destination within @drawable.
|
|
* @width: the width of the area to be copied, or -1 to make the area
|
|
* extend to the right edge of @image.
|
|
* @height: the height of the area to be copied, or -1 to make the area
|
|
* extend to the bottom edge of @image.
|
|
*
|
|
* Draws a #GdkImage onto a drawable.
|
|
* The depth of the #GdkImage must match the depth of the #GdkDrawable.
|
|
**/
|
|
void
|
|
gdk_draw_image (GdkDrawable *drawable,
|
|
GdkGC *gc,
|
|
GdkImage *image,
|
|
gint xsrc,
|
|
gint ysrc,
|
|
gint xdest,
|
|
gint ydest,
|
|
gint width,
|
|
gint height)
|
|
{
|
|
g_return_if_fail (GDK_IS_DRAWABLE (drawable));
|
|
g_return_if_fail (GDK_IS_IMAGE (image));
|
|
g_return_if_fail (GDK_IS_GC (gc));
|
|
|
|
if (width == -1)
|
|
width = image->width;
|
|
if (height == -1)
|
|
height = image->height;
|
|
|
|
GDK_DRAWABLE_GET_CLASS (drawable)->draw_image (drawable, gc, image, xsrc, ysrc,
|
|
xdest, ydest, width, height);
|
|
}
|
|
|
|
/**
|
|
* gdk_draw_pixbuf:
|
|
* @drawable: Destination drawable.
|
|
* @gc: a #GdkGC, used for clipping, or %NULL
|
|
* @pixbuf: a #GdkPixbuf
|
|
* @src_x: Source X coordinate within pixbuf.
|
|
* @src_y: Source Y coordinates within pixbuf.
|
|
* @dest_x: Destination X coordinate within drawable.
|
|
* @dest_y: Destination Y coordinate within drawable.
|
|
* @width: Width of region to render, in pixels, or -1 to use pixbuf width.
|
|
* @height: Height of region to render, in pixels, or -1 to use pixbuf height.
|
|
* @dither: Dithering mode for #GdkRGB.
|
|
* @x_dither: X offset for dither.
|
|
* @y_dither: Y offset for dither.
|
|
*
|
|
* Renders a rectangular portion of a pixbuf to a drawable. The destination
|
|
* drawable must have a colormap. All windows have a colormap, however, pixmaps
|
|
* only have colormap by default if they were created with a non-%NULL window
|
|
* argument. Otherwise a colormap must be set on them with
|
|
* gdk_drawable_set_colormap().
|
|
*
|
|
* On older X servers, rendering pixbufs with an alpha channel involves round
|
|
* trips to the X server, and may be somewhat slow.
|
|
*
|
|
* The clip mask of @gc is ignored, but clip rectangles and clip regions work
|
|
* fine.
|
|
*
|
|
* If GDK is built with the Sun mediaLib library, the gdk_draw_pixbuf
|
|
* function is accelerated using mediaLib, which provides hardware
|
|
* acceleration on Intel, AMD, and Sparc chipsets. If desired, mediaLib
|
|
* support can be turned off by setting the GDK_DISABLE_MEDIALIB environment
|
|
* variable.
|
|
*
|
|
* Since: 2.2
|
|
**/
|
|
void
|
|
gdk_draw_pixbuf (GdkDrawable *drawable,
|
|
GdkGC *gc,
|
|
const GdkPixbuf *pixbuf,
|
|
gint src_x,
|
|
gint src_y,
|
|
gint dest_x,
|
|
gint dest_y,
|
|
gint width,
|
|
gint height,
|
|
GdkRgbDither dither,
|
|
gint x_dither,
|
|
gint y_dither)
|
|
{
|
|
g_return_if_fail (GDK_IS_DRAWABLE (drawable));
|
|
g_return_if_fail (gc == NULL || GDK_IS_GC (gc));
|
|
g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
|
|
|
|
if (width == 0 || height == 0)
|
|
return;
|
|
|
|
if (width == -1)
|
|
width = gdk_pixbuf_get_width (pixbuf);
|
|
if (height == -1)
|
|
height = gdk_pixbuf_get_height (pixbuf);
|
|
|
|
GDK_DRAWABLE_GET_CLASS (drawable)->draw_pixbuf (drawable, gc,
|
|
(GdkPixbuf *) pixbuf,
|
|
src_x, src_y, dest_x, dest_y,
|
|
width, height,
|
|
dither, x_dither, y_dither);
|
|
}
|
|
|
|
/**
|
|
* gdk_draw_points:
|
|
* @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
|
|
* @gc: a #GdkGC.
|
|
* @points: an array of #GdkPoint structures.
|
|
* @n_points: the number of points to be drawn.
|
|
*
|
|
* Draws a number of points, using the foreground color and other
|
|
* attributes of the #GdkGC.
|
|
**/
|
|
void
|
|
gdk_draw_points (GdkDrawable *drawable,
|
|
GdkGC *gc,
|
|
const GdkPoint *points,
|
|
gint n_points)
|
|
{
|
|
g_return_if_fail (GDK_IS_DRAWABLE (drawable));
|
|
g_return_if_fail ((points != NULL) && (n_points > 0));
|
|
g_return_if_fail (GDK_IS_GC (gc));
|
|
g_return_if_fail (n_points >= 0);
|
|
|
|
if (n_points == 0)
|
|
return;
|
|
|
|
GDK_DRAWABLE_GET_CLASS (drawable)->draw_points (drawable, gc,
|
|
(GdkPoint *) points, n_points);
|
|
}
|
|
|
|
/**
|
|
* gdk_draw_segments:
|
|
* @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
|
|
* @gc: a #GdkGC.
|
|
* @segs: an array of #GdkSegment structures specifying the start and
|
|
* end points of the lines to be drawn.
|
|
* @n_segs: the number of line segments to draw, i.e. the size of the
|
|
* @segs array.
|
|
*
|
|
* Draws a number of unconnected lines.
|
|
**/
|
|
void
|
|
gdk_draw_segments (GdkDrawable *drawable,
|
|
GdkGC *gc,
|
|
const GdkSegment *segs,
|
|
gint n_segs)
|
|
{
|
|
g_return_if_fail (GDK_IS_DRAWABLE (drawable));
|
|
|
|
if (n_segs == 0)
|
|
return;
|
|
|
|
g_return_if_fail (segs != NULL);
|
|
g_return_if_fail (GDK_IS_GC (gc));
|
|
g_return_if_fail (n_segs >= 0);
|
|
|
|
GDK_DRAWABLE_GET_CLASS (drawable)->draw_segments (drawable, gc,
|
|
(GdkSegment *) segs, n_segs);
|
|
}
|
|
|
|
/**
|
|
* gdk_draw_lines:
|
|
* @drawable: a #GdkDrawable (a #GdkWindow or a #GdkPixmap).
|
|
* @gc: a #GdkGC.
|
|
* @points: an array of #GdkPoint structures specifying the endpoints of the
|
|
* @n_points: the size of the @points array.
|
|
*
|
|
* Draws a series of lines connecting the given points.
|
|
* The way in which joins between lines are draw is determined by the
|
|
* #GdkCapStyle value in the #GdkGC. This can be set with
|
|
* gdk_gc_set_line_attributes().
|
|
**/
|
|
void
|
|
gdk_draw_lines (GdkDrawable *drawable,
|
|
GdkGC *gc,
|
|
const GdkPoint *points,
|
|
gint n_points)
|
|
{
|
|
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 (n_points >= 0);
|
|
|
|
if (n_points == 0)
|
|
return;
|
|
|
|
GDK_DRAWABLE_GET_CLASS (drawable)->draw_lines (drawable, gc,
|
|
(GdkPoint *) points, n_points);
|
|
}
|
|
|
|
static void
|
|
real_draw_glyphs (GdkDrawable *drawable,
|
|
GdkGC *gc,
|
|
const PangoMatrix *matrix,
|
|
PangoFont *font,
|
|
gdouble x,
|
|
gdouble y,
|
|
PangoGlyphString *glyphs)
|
|
{
|
|
cairo_t *cr;
|
|
|
|
cr = gdk_cairo_create (drawable);
|
|
_gdk_gc_update_context (gc, cr, NULL, NULL, TRUE, drawable);
|
|
|
|
if (matrix)
|
|
{
|
|
cairo_matrix_t cairo_matrix;
|
|
|
|
cairo_matrix.xx = matrix->xx;
|
|
cairo_matrix.yx = matrix->yx;
|
|
cairo_matrix.xy = matrix->xy;
|
|
cairo_matrix.yy = matrix->yy;
|
|
cairo_matrix.x0 = matrix->x0;
|
|
cairo_matrix.y0 = matrix->y0;
|
|
|
|
cairo_set_matrix (cr, &cairo_matrix);
|
|
}
|
|
|
|
cairo_move_to (cr, x, y);
|
|
pango_cairo_show_glyph_string (cr, font, glyphs);
|
|
|
|
cairo_destroy (cr);
|
|
}
|
|
|
|
/**
|
|
* gdk_draw_glyphs:
|
|
* @drawable: a #GdkDrawable
|
|
* @gc: a #GdkGC
|
|
* @font: font to be used
|
|
* @x: X coordinate of baseline origin
|
|
* @y: Y coordinate of baseline origin
|
|
* @glyphs: the glyph string to draw
|
|
*
|
|
* This is a low-level function; 99% of text rendering should be done
|
|
* using gdk_draw_layout() instead.
|
|
*
|
|
* A glyph is a single image in a font. This function draws a sequence of
|
|
* glyphs. To obtain a sequence of glyphs you have to understand a
|
|
* lot about internationalized text handling, which you don't want to
|
|
* understand; thus, use gdk_draw_layout() instead of this function,
|
|
* gdk_draw_layout() handles the details.
|
|
*
|
|
**/
|
|
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));
|
|
|
|
real_draw_glyphs (drawable, gc, NULL, font,
|
|
x, y, glyphs);
|
|
}
|
|
|
|
/**
|
|
* gdk_draw_glyphs_transformed:
|
|
* @drawable: a #GdkDrawable
|
|
* @gc: a #GdkGC
|
|
* @matrix: a #PangoMatrix, or %NULL to use an identity transformation
|
|
* @font: the font in which to draw the string
|
|
* @x: the x position of the start of the string (in Pango
|
|
* units in user space coordinates)
|
|
* @y: the y position of the baseline (in Pango units
|
|
* in user space coordinates)
|
|
* @glyphs: the glyph string to draw
|
|
*
|
|
* Renders a #PangoGlyphString onto a drawable, possibly
|
|
* transforming the layed-out coordinates through a transformation
|
|
* matrix. Note that the transformation matrix for @font is not
|
|
* changed, so to produce correct rendering results, the @font
|
|
* must have been loaded using a #PangoContext with an identical
|
|
* transformation matrix to that passed in to this function.
|
|
*
|
|
* See also gdk_draw_glyphs(), gdk_draw_layout().
|
|
*
|
|
* Since: 2.6
|
|
**/
|
|
void
|
|
gdk_draw_glyphs_transformed (GdkDrawable *drawable,
|
|
GdkGC *gc,
|
|
const PangoMatrix *matrix,
|
|
PangoFont *font,
|
|
gint x,
|
|
gint y,
|
|
PangoGlyphString *glyphs)
|
|
{
|
|
g_return_if_fail (GDK_IS_DRAWABLE (drawable));
|
|
g_return_if_fail (GDK_IS_GC (gc));
|
|
|
|
real_draw_glyphs (drawable, gc, matrix, font,
|
|
x / PANGO_SCALE, y / PANGO_SCALE, glyphs);
|
|
}
|
|
|
|
/**
|
|
* gdk_draw_trapezoids:
|
|
* @drawable: a #GdkDrawable
|
|
* @gc: a #GdkGC
|
|
* @trapezoids: an array of #GdkTrapezoid structures
|
|
* @n_trapezoids: the number of trapezoids to draw
|
|
*
|
|
* Draws a set of anti-aliased trapezoids. The trapezoids are
|
|
* combined using saturation addition, then drawn over the background
|
|
* as a set. This is low level functionality used internally to implement
|
|
* rotated underlines and backgrouds when rendering a PangoLayout and is
|
|
* likely not useful for applications.
|
|
*
|
|
* Since: 2.6
|
|
**/
|
|
void
|
|
gdk_draw_trapezoids (GdkDrawable *drawable,
|
|
GdkGC *gc,
|
|
const GdkTrapezoid *trapezoids,
|
|
gint n_trapezoids)
|
|
{
|
|
cairo_t *cr;
|
|
int i;
|
|
|
|
g_return_if_fail (GDK_IS_DRAWABLE (drawable));
|
|
g_return_if_fail (GDK_IS_GC (gc));
|
|
g_return_if_fail (n_trapezoids == 0 || trapezoids != NULL);
|
|
|
|
cr = gdk_cairo_create (drawable);
|
|
_gdk_gc_update_context (gc, cr, NULL, NULL, TRUE, drawable);
|
|
|
|
for (i = 0; i < n_trapezoids; i++)
|
|
{
|
|
cairo_move_to (cr, trapezoids[i].x11, trapezoids[i].y1);
|
|
cairo_line_to (cr, trapezoids[i].x21, trapezoids[i].y1);
|
|
cairo_line_to (cr, trapezoids[i].x22, trapezoids[i].y2);
|
|
cairo_line_to (cr, trapezoids[i].x12, trapezoids[i].y2);
|
|
cairo_close_path (cr);
|
|
}
|
|
|
|
cairo_fill (cr);
|
|
|
|
cairo_destroy (cr);
|
|
}
|
|
|
|
/**
|
|
* gdk_drawable_copy_to_image:
|
|
* @drawable: a #GdkDrawable
|
|
* @image: a #GdkDrawable, or %NULL if a new @image should be created.
|
|
* @src_x: x coordinate on @drawable
|
|
* @src_y: y coordinate on @drawable
|
|
* @dest_x: x coordinate within @image. Must be 0 if @image is %NULL
|
|
* @dest_y: y coordinate within @image. Must be 0 if @image is %NULL
|
|
* @width: width of region to get
|
|
* @height: height or region to get
|
|
*
|
|
* Copies a portion of @drawable into the client side image structure
|
|
* @image. If @image is %NULL, creates a new image of size @width x @height
|
|
* and copies into that. See gdk_drawable_get_image() for further details.
|
|
*
|
|
* Return value: @image, or a new a #GdkImage containing the contents
|
|
* of @drawable
|
|
*
|
|
* Since: 2.4
|
|
**/
|
|
GdkImage*
|
|
gdk_drawable_copy_to_image (GdkDrawable *drawable,
|
|
GdkImage *image,
|
|
gint src_x,
|
|
gint src_y,
|
|
gint dest_x,
|
|
gint dest_y,
|
|
gint width,
|
|
gint height)
|
|
{
|
|
GdkDrawable *composite;
|
|
gint composite_x_offset = 0;
|
|
gint composite_y_offset = 0;
|
|
GdkImage *retval;
|
|
GdkColormap *cmap;
|
|
|
|
g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
|
|
g_return_val_if_fail (src_x >= 0, NULL);
|
|
g_return_val_if_fail (src_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,
|
|
src_x, src_y,
|
|
width, height,
|
|
&composite_x_offset,
|
|
&composite_y_offset);
|
|
|
|
retval = GDK_DRAWABLE_GET_CLASS (composite)->_copy_to_image (composite,
|
|
image,
|
|
src_x - composite_x_offset,
|
|
src_y - composite_y_offset,
|
|
dest_x, dest_y,
|
|
width, height);
|
|
|
|
g_object_unref (composite);
|
|
|
|
if (!image && retval)
|
|
{
|
|
cmap = gdk_drawable_get_colormap (drawable);
|
|
|
|
if (cmap)
|
|
gdk_image_set_colormap (retval, cmap);
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* If the source drawable is a #GdkWindow and partially offscreen
|
|
* or obscured, then the obscured portions of the returned image
|
|
* will contain undefined 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;
|
|
GdkColormap *cmap;
|
|
|
|
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 (composite);
|
|
|
|
cmap = gdk_drawable_get_colormap (drawable);
|
|
|
|
if (retval && cmap)
|
|
gdk_image_set_colormap (retval, cmap);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static GdkImage*
|
|
gdk_drawable_real_get_image (GdkDrawable *drawable,
|
|
gint x,
|
|
gint y,
|
|
gint width,
|
|
gint height)
|
|
{
|
|
return gdk_drawable_copy_to_image (drawable, NULL, x, y, 0, 0, width, height);
|
|
}
|
|
|
|
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 g_object_ref (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.
|
|
*
|
|
* Returns: 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: a #GdkDrawable
|
|
*
|
|
* 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.
|
|
*
|
|
* Returns: 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;
|
|
|
|
gdk_drawable_get_size (drawable, &rect.width, &rect.height);
|
|
|
|
return gdk_region_rectangle (&rect);
|
|
}
|
|
|
|
/**
|
|
* _gdk_drawable_ref_cairo_surface:
|
|
* @drawable: a #GdkDrawable
|
|
*
|
|
* Obtains a #cairo_surface_t for the given drawable. If a
|
|
* #cairo_surface_t for the drawable already exists, it will be
|
|
* referenced, otherwise a new surface will be created.
|
|
*
|
|
* Return value: a newly referenced #cairo_surface_t that points
|
|
* to @drawable. Unref with cairo_surface_destroy()
|
|
**/
|
|
cairo_surface_t *
|
|
_gdk_drawable_ref_cairo_surface (GdkDrawable *drawable)
|
|
{
|
|
g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
|
|
|
|
return GDK_DRAWABLE_GET_CLASS (drawable)->ref_cairo_surface (drawable);
|
|
}
|
|
|
|
static void
|
|
composite (guchar *src_buf,
|
|
gint src_rowstride,
|
|
guchar *dest_buf,
|
|
gint dest_rowstride,
|
|
gint width,
|
|
gint height)
|
|
{
|
|
guchar *src = src_buf;
|
|
guchar *dest = dest_buf;
|
|
|
|
while (height--)
|
|
{
|
|
gint twidth = width;
|
|
guchar *p = src;
|
|
guchar *q = dest;
|
|
|
|
while (twidth--)
|
|
{
|
|
guchar a = p[3];
|
|
guint t;
|
|
|
|
t = a * p[0] + (255 - a) * q[0] + 0x80;
|
|
q[0] = (t + (t >> 8)) >> 8;
|
|
t = a * p[1] + (255 - a) * q[1] + 0x80;
|
|
q[1] = (t + (t >> 8)) >> 8;
|
|
t = a * p[2] + (255 - a) * q[2] + 0x80;
|
|
q[2] = (t + (t >> 8)) >> 8;
|
|
|
|
p += 4;
|
|
q += 3;
|
|
}
|
|
|
|
src += src_rowstride;
|
|
dest += dest_rowstride;
|
|
}
|
|
}
|
|
|
|
static void
|
|
composite_0888 (guchar *src_buf,
|
|
gint src_rowstride,
|
|
guchar *dest_buf,
|
|
gint dest_rowstride,
|
|
GdkByteOrder dest_byte_order,
|
|
gint width,
|
|
gint height)
|
|
{
|
|
guchar *src = src_buf;
|
|
guchar *dest = dest_buf;
|
|
|
|
while (height--)
|
|
{
|
|
gint twidth = width;
|
|
guchar *p = src;
|
|
guchar *q = dest;
|
|
|
|
if (dest_byte_order == GDK_LSB_FIRST)
|
|
{
|
|
while (twidth--)
|
|
{
|
|
guint t;
|
|
|
|
t = p[3] * p[2] + (255 - p[3]) * q[0] + 0x80;
|
|
q[0] = (t + (t >> 8)) >> 8;
|
|
t = p[3] * p[1] + (255 - p[3]) * q[1] + 0x80;
|
|
q[1] = (t + (t >> 8)) >> 8;
|
|
t = p[3] * p[0] + (255 - p[3]) * q[2] + 0x80;
|
|
q[2] = (t + (t >> 8)) >> 8;
|
|
p += 4;
|
|
q += 4;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
while (twidth--)
|
|
{
|
|
guint t;
|
|
|
|
t = p[3] * p[0] + (255 - p[3]) * q[1] + 0x80;
|
|
q[1] = (t + (t >> 8)) >> 8;
|
|
t = p[3] * p[1] + (255 - p[3]) * q[2] + 0x80;
|
|
q[2] = (t + (t >> 8)) >> 8;
|
|
t = p[3] * p[2] + (255 - p[3]) * q[3] + 0x80;
|
|
q[3] = (t + (t >> 8)) >> 8;
|
|
p += 4;
|
|
q += 4;
|
|
}
|
|
}
|
|
|
|
src += src_rowstride;
|
|
dest += dest_rowstride;
|
|
}
|
|
}
|
|
|
|
#ifdef USE_MEDIALIB
|
|
static void
|
|
composite_0888_medialib (guchar *src_buf,
|
|
gint src_rowstride,
|
|
guchar *dest_buf,
|
|
gint dest_rowstride,
|
|
GdkByteOrder dest_byte_order,
|
|
gint width,
|
|
gint height)
|
|
{
|
|
guchar *src = src_buf;
|
|
guchar *dest = dest_buf;
|
|
|
|
mlib_image img_src, img_dst;
|
|
|
|
mlib_ImageSetStruct (&img_dst,
|
|
MLIB_BYTE,
|
|
4,
|
|
width,
|
|
height,
|
|
dest_rowstride,
|
|
dest_buf);
|
|
|
|
mlib_ImageSetStruct (&img_src,
|
|
MLIB_BYTE,
|
|
4,
|
|
width,
|
|
height,
|
|
src_rowstride,
|
|
src_buf);
|
|
|
|
if (dest_byte_order == GDK_LSB_FIRST)
|
|
mlib_ImageBlendRGBA2BGRA (&img_dst, &img_src);
|
|
else
|
|
mlib_ImageBlendRGBA2ARGB (&img_dst, &img_src);
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
composite_565 (guchar *src_buf,
|
|
gint src_rowstride,
|
|
guchar *dest_buf,
|
|
gint dest_rowstride,
|
|
GdkByteOrder dest_byte_order,
|
|
gint width,
|
|
gint height)
|
|
{
|
|
guchar *src = src_buf;
|
|
guchar *dest = dest_buf;
|
|
|
|
while (height--)
|
|
{
|
|
gint twidth = width;
|
|
guchar *p = src;
|
|
gushort *q = (gushort *)dest;
|
|
|
|
while (twidth--)
|
|
{
|
|
guchar a = p[3];
|
|
guint tr, tg, tb;
|
|
guint tr1, tg1, tb1;
|
|
guint tmp = *q;
|
|
|
|
#if 1
|
|
/* This is fast, and corresponds to what composite() above does
|
|
* if we converted to 8-bit first.
|
|
*/
|
|
tr = (tmp & 0xf800);
|
|
tr1 = a * p[0] + (255 - a) * ((tr >> 8) + (tr >> 13)) + 0x80;
|
|
tg = (tmp & 0x07e0);
|
|
tg1 = a * p[1] + (255 - a) * ((tg >> 3) + (tg >> 9)) + 0x80;
|
|
tb = (tmp & 0x001f);
|
|
tb1 = a * p[2] + (255 - a) * ((tb << 3) + (tb >> 2)) + 0x80;
|
|
|
|
*q = (((tr1 + (tr1 >> 8)) & 0xf800) |
|
|
(((tg1 + (tg1 >> 8)) & 0xfc00) >> 5) |
|
|
((tb1 + (tb1 >> 8)) >> 11));
|
|
#else
|
|
/* This version correspond to the result we get with XRENDER -
|
|
* a bit of precision is lost since we convert to 8 bit after premultiplying
|
|
* instead of at the end
|
|
*/
|
|
guint tr2, tg2, tb2;
|
|
guint tr3, tg3, tb3;
|
|
|
|
tr = (tmp & 0xf800);
|
|
tr1 = (255 - a) * ((tr >> 8) + (tr >> 13)) + 0x80;
|
|
tr2 = a * p[0] + 0x80;
|
|
tr3 = ((tr1 + (tr1 >> 8)) >> 8) + ((tr2 + (tr2 >> 8)) >> 8);
|
|
|
|
tg = (tmp & 0x07e0);
|
|
tg1 = (255 - a) * ((tg >> 3) + (tg >> 9)) + 0x80;
|
|
tg2 = a * p[0] + 0x80;
|
|
tg3 = ((tg1 + (tg1 >> 8)) >> 8) + ((tg2 + (tg2 >> 8)) >> 8);
|
|
|
|
tb = (tmp & 0x001f);
|
|
tb1 = (255 - a) * ((tb << 3) + (tb >> 2)) + 0x80;
|
|
tb2 = a * p[0] + 0x80;
|
|
tb3 = ((tb1 + (tb1 >> 8)) >> 8) + ((tb2 + (tb2 >> 8)) >> 8);
|
|
|
|
*q = (((tr3 & 0xf8) << 8) |
|
|
((tg3 & 0xfc) << 3) |
|
|
((tb3 >> 3)));
|
|
#endif
|
|
|
|
p += 4;
|
|
q++;
|
|
}
|
|
|
|
src += src_rowstride;
|
|
dest += dest_rowstride;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gdk_drawable_real_draw_pixbuf (GdkDrawable *drawable,
|
|
GdkGC *gc,
|
|
GdkPixbuf *pixbuf,
|
|
gint src_x,
|
|
gint src_y,
|
|
gint dest_x,
|
|
gint dest_y,
|
|
gint width,
|
|
gint height,
|
|
GdkRgbDither dither,
|
|
gint x_dither,
|
|
gint y_dither)
|
|
{
|
|
GdkPixbuf *composited = NULL;
|
|
gint dwidth, dheight;
|
|
GdkRegion *clip;
|
|
GdkRegion *drect;
|
|
GdkRectangle tmp_rect;
|
|
|
|
g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
|
|
g_return_if_fail (pixbuf->colorspace == GDK_COLORSPACE_RGB);
|
|
g_return_if_fail (pixbuf->n_channels == 3 || pixbuf->n_channels == 4);
|
|
g_return_if_fail (pixbuf->bits_per_sample == 8);
|
|
|
|
g_return_if_fail (drawable != NULL);
|
|
|
|
if (width == -1)
|
|
width = pixbuf->width;
|
|
if (height == -1)
|
|
height = pixbuf->height;
|
|
|
|
g_return_if_fail (width >= 0 && height >= 0);
|
|
g_return_if_fail (src_x >= 0 && src_x + width <= pixbuf->width);
|
|
g_return_if_fail (src_y >= 0 && src_y + height <= pixbuf->height);
|
|
|
|
/* Clip to the drawable; this is required for get_from_drawable() so
|
|
* can't be done implicitly
|
|
*/
|
|
|
|
if (dest_x < 0)
|
|
{
|
|
src_x -= dest_x;
|
|
width += dest_x;
|
|
dest_x = 0;
|
|
}
|
|
|
|
if (dest_y < 0)
|
|
{
|
|
src_y -= dest_y;
|
|
height += dest_y;
|
|
dest_y = 0;
|
|
}
|
|
|
|
gdk_drawable_get_size (drawable, &dwidth, &dheight);
|
|
|
|
if ((dest_x + width) > dwidth)
|
|
width = dwidth - dest_x;
|
|
|
|
if ((dest_y + height) > dheight)
|
|
height = dheight - dest_y;
|
|
|
|
if (width <= 0 || height <= 0)
|
|
return;
|
|
|
|
/* Clip to the clip region; this avoids getting more
|
|
* image data from the server than we need to.
|
|
*/
|
|
|
|
tmp_rect.x = dest_x;
|
|
tmp_rect.y = dest_y;
|
|
tmp_rect.width = width;
|
|
tmp_rect.height = height;
|
|
|
|
drect = gdk_region_rectangle (&tmp_rect);
|
|
clip = gdk_drawable_get_clip_region (drawable);
|
|
|
|
gdk_region_intersect (drect, clip);
|
|
|
|
gdk_region_get_clipbox (drect, &tmp_rect);
|
|
|
|
gdk_region_destroy (drect);
|
|
gdk_region_destroy (clip);
|
|
|
|
if (tmp_rect.width == 0 ||
|
|
tmp_rect.height == 0)
|
|
return;
|
|
|
|
/* Actually draw */
|
|
if (!gc)
|
|
gc = _gdk_drawable_get_scratch_gc (drawable, FALSE);
|
|
|
|
if (pixbuf->has_alpha)
|
|
{
|
|
GdkVisual *visual = gdk_drawable_get_visual (drawable);
|
|
void (*composite_func) (guchar *src_buf,
|
|
gint src_rowstride,
|
|
guchar *dest_buf,
|
|
gint dest_rowstride,
|
|
GdkByteOrder dest_byte_order,
|
|
gint width,
|
|
gint height) = NULL;
|
|
|
|
/* First we see if we have a visual-specific composition function that can composite
|
|
* the pixbuf data directly onto the image
|
|
*/
|
|
if (visual)
|
|
{
|
|
gint bits_per_pixel = _gdk_windowing_get_bits_for_depth (gdk_drawable_get_display (drawable),
|
|
visual->depth);
|
|
|
|
if (visual->byte_order == (G_BYTE_ORDER == G_BIG_ENDIAN ? GDK_MSB_FIRST : GDK_LSB_FIRST) &&
|
|
visual->depth == 16 &&
|
|
visual->red_mask == 0xf800 &&
|
|
visual->green_mask == 0x07e0 &&
|
|
visual->blue_mask == 0x001f)
|
|
composite_func = composite_565;
|
|
else if (visual->depth == 24 && bits_per_pixel == 32 &&
|
|
visual->red_mask == 0xff0000 &&
|
|
visual->green_mask == 0x00ff00 &&
|
|
visual->blue_mask == 0x0000ff)
|
|
{
|
|
#ifdef USE_MEDIALIB
|
|
if (_gdk_use_medialib ())
|
|
composite_func = composite_0888_medialib;
|
|
else
|
|
composite_func = composite_0888;
|
|
#else
|
|
composite_func = composite_0888;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/* We can't use our composite func if we are required to dither
|
|
*/
|
|
if (composite_func && !(dither == GDK_RGB_DITHER_MAX && visual->depth != 24))
|
|
{
|
|
gint x0, y0;
|
|
for (y0 = 0; y0 < height; y0 += GDK_SCRATCH_IMAGE_HEIGHT)
|
|
{
|
|
gint height1 = MIN (height - y0, GDK_SCRATCH_IMAGE_HEIGHT);
|
|
for (x0 = 0; x0 < width; x0 += GDK_SCRATCH_IMAGE_WIDTH)
|
|
{
|
|
gint xs0, ys0;
|
|
|
|
gint width1 = MIN (width - x0, GDK_SCRATCH_IMAGE_WIDTH);
|
|
|
|
GdkImage *image = _gdk_image_get_scratch (gdk_drawable_get_screen (drawable),
|
|
width1, height1,
|
|
gdk_drawable_get_depth (drawable), &xs0, &ys0);
|
|
|
|
gdk_drawable_copy_to_image (drawable, image,
|
|
dest_x + x0, dest_y + y0,
|
|
xs0, ys0,
|
|
width1, height1);
|
|
(*composite_func) (pixbuf->pixels + (src_y + y0) * pixbuf->rowstride + (src_x + x0) * 4,
|
|
pixbuf->rowstride,
|
|
(guchar*)image->mem + ys0 * image->bpl + xs0 * image->bpp,
|
|
image->bpl,
|
|
visual->byte_order,
|
|
width1, height1);
|
|
gdk_draw_image (drawable, gc, image,
|
|
xs0, ys0,
|
|
dest_x + x0, dest_y + y0,
|
|
width1, height1);
|
|
}
|
|
}
|
|
|
|
goto out;
|
|
}
|
|
else
|
|
{
|
|
/* No special composition func, convert dest to 24 bit RGB data, composite against
|
|
* that, and convert back.
|
|
*/
|
|
composited = gdk_pixbuf_get_from_drawable (NULL,
|
|
drawable,
|
|
NULL,
|
|
dest_x, dest_y,
|
|
0, 0,
|
|
width, height);
|
|
|
|
if (composited)
|
|
composite (pixbuf->pixels + src_y * pixbuf->rowstride + src_x * 4,
|
|
pixbuf->rowstride,
|
|
composited->pixels,
|
|
composited->rowstride,
|
|
width, height);
|
|
}
|
|
}
|
|
|
|
if (composited)
|
|
{
|
|
src_x = 0;
|
|
src_y = 0;
|
|
pixbuf = composited;
|
|
}
|
|
|
|
if (pixbuf->n_channels == 4)
|
|
{
|
|
guchar *buf = pixbuf->pixels + src_y * pixbuf->rowstride + src_x * 4;
|
|
|
|
gdk_draw_rgb_32_image_dithalign (drawable, gc,
|
|
dest_x, dest_y,
|
|
width, height,
|
|
dither,
|
|
buf, pixbuf->rowstride,
|
|
x_dither, y_dither);
|
|
}
|
|
else /* n_channels == 3 */
|
|
{
|
|
guchar *buf = pixbuf->pixels + src_y * pixbuf->rowstride + src_x * 3;
|
|
|
|
gdk_draw_rgb_image_dithalign (drawable, gc,
|
|
dest_x, dest_y,
|
|
width, height,
|
|
dither,
|
|
buf, pixbuf->rowstride,
|
|
x_dither, y_dither);
|
|
}
|
|
|
|
out:
|
|
if (composited)
|
|
g_object_unref (composited);
|
|
}
|
|
|
|
/************************************************************************/
|
|
|
|
/**
|
|
* _gdk_drawable_get_scratch_gc:
|
|
* @drawable: A #GdkDrawable
|
|
* @graphics_exposures: Whether the returned #GdkGC should generate graphics exposures
|
|
*
|
|
* Returns a #GdkGC suitable for drawing on @drawable. The #GdkGC has
|
|
* the standard values for @drawable, except for the graphics_exposures
|
|
* field which is determined by the @graphics_exposures parameter.
|
|
*
|
|
* The foreground color of the returned #GdkGC is undefined. The #GdkGC
|
|
* must not be altered in any way, except to change its foreground color.
|
|
*
|
|
* Return value: A #GdkGC suitable for drawing on @drawable
|
|
*
|
|
* Since: 2.4
|
|
**/
|
|
GdkGC *
|
|
_gdk_drawable_get_scratch_gc (GdkDrawable *drawable,
|
|
gboolean graphics_exposures)
|
|
{
|
|
GdkScreen *screen;
|
|
gint depth;
|
|
|
|
g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
|
|
|
|
screen = gdk_drawable_get_screen (drawable);
|
|
|
|
g_return_val_if_fail (!screen->closed, NULL);
|
|
|
|
depth = gdk_drawable_get_depth (drawable) - 1;
|
|
|
|
if (graphics_exposures)
|
|
{
|
|
if (!screen->exposure_gcs[depth])
|
|
{
|
|
GdkGCValues values;
|
|
GdkGCValuesMask mask;
|
|
|
|
values.graphics_exposures = TRUE;
|
|
mask = GDK_GC_EXPOSURES;
|
|
|
|
screen->exposure_gcs[depth] =
|
|
gdk_gc_new_with_values (drawable, &values, mask);
|
|
}
|
|
|
|
return screen->exposure_gcs[depth];
|
|
}
|
|
else
|
|
{
|
|
if (!screen->normal_gcs[depth])
|
|
{
|
|
screen->normal_gcs[depth] =
|
|
gdk_gc_new (drawable);
|
|
}
|
|
|
|
return screen->normal_gcs[depth];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* _gdk_drawable_get_source_drawable:
|
|
* @drawable: a #GdkDrawable
|
|
*
|
|
* Returns a drawable for the passed @drawable that is guaranteed to be
|
|
* usable to create a pixmap (e.g.: not an offscreen window).
|
|
*
|
|
* Since: 2.16
|
|
*/
|
|
GdkDrawable *
|
|
_gdk_drawable_get_source_drawable (GdkDrawable *drawable)
|
|
{
|
|
g_return_val_if_fail (GDK_IS_DRAWABLE (drawable), NULL);
|
|
|
|
if (GDK_DRAWABLE_GET_CLASS (drawable)->get_source_drawable)
|
|
return GDK_DRAWABLE_GET_CLASS (drawable)->get_source_drawable (drawable);
|
|
|
|
return drawable;
|
|
}
|
|
|
|
cairo_surface_t *
|
|
_gdk_drawable_create_cairo_surface (GdkDrawable *drawable,
|
|
int width,
|
|
int height)
|
|
{
|
|
return GDK_DRAWABLE_GET_CLASS (drawable)->create_cairo_surface (drawable,
|
|
width, height);
|
|
}
|
|
|
|
|
|
#define __GDK_DRAW_C__
|
|
#include "gdkaliasdef.c"
|