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gtk/gdk/x11/gdkdrawable-x11.c

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/* GIMP Drawing Kit
* 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 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
* Lesser General Public License for more details.
*
* 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.
*/
/*
* 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 "config.h"
#include "gdkx.h"
#include <cairo-xlib.h>
#include <stdlib.h>
#include <string.h> /* for memcpy() */
#if defined (HAVE_IPC_H) && defined (HAVE_SHM_H) && defined (HAVE_XSHM_H)
#define USE_SHM
#endif
#ifdef USE_SHM
#include <X11/extensions/XShm.h>
#endif /* USE_SHM */
#include "gdkprivate-x11.h"
#include "gdkdrawable-x11.h"
#include "gdkpixmap-x11.h"
#include "gdkscreen-x11.h"
#include "gdkdisplay-x11.h"
#include "gdkalias.h"
static void gdk_x11_draw_rectangle (GdkDrawable *drawable,
GdkGC *gc,
gboolean filled,
gint x,
gint y,
gint width,
gint height);
static void gdk_x11_draw_arc (GdkDrawable *drawable,
GdkGC *gc,
gboolean filled,
gint x,
gint y,
gint width,
gint height,
gint angle1,
gint angle2);
static void gdk_x11_draw_polygon (GdkDrawable *drawable,
GdkGC *gc,
gboolean filled,
GdkPoint *points,
gint npoints);
static void gdk_x11_draw_drawable (GdkDrawable *drawable,
GdkGC *gc,
GdkPixmap *src,
gint xsrc,
gint ysrc,
gint xdest,
gint ydest,
gint width,
gint height,
GdkDrawable *original_src);
static void gdk_x11_draw_points (GdkDrawable *drawable,
GdkGC *gc,
GdkPoint *points,
gint npoints);
static void gdk_x11_draw_segments (GdkDrawable *drawable,
GdkGC *gc,
GdkSegment *segs,
gint nsegs);
static void gdk_x11_draw_lines (GdkDrawable *drawable,
GdkGC *gc,
GdkPoint *points,
gint npoints);
static void gdk_x11_draw_image (GdkDrawable *drawable,
GdkGC *gc,
GdkImage *image,
gint xsrc,
gint ysrc,
gint xdest,
gint ydest,
gint width,
gint height);
static void gdk_x11_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);
static cairo_surface_t *gdk_x11_ref_cairo_surface (GdkDrawable *drawable);
static void gdk_x11_set_colormap (GdkDrawable *drawable,
GdkColormap *colormap);
static GdkColormap* gdk_x11_get_colormap (GdkDrawable *drawable);
static gint gdk_x11_get_depth (GdkDrawable *drawable);
static GdkScreen * gdk_x11_get_screen (GdkDrawable *drawable);
static GdkVisual* gdk_x11_get_visual (GdkDrawable *drawable);
static void gdk_drawable_impl_x11_finalize (GObject *object);
static const cairo_user_data_key_t gdk_x11_cairo_key;
G_DEFINE_TYPE (GdkDrawableImplX11, _gdk_drawable_impl_x11, GDK_TYPE_DRAWABLE)
static void
_gdk_drawable_impl_x11_class_init (GdkDrawableImplX11Class *klass)
{
GdkDrawableClass *drawable_class = GDK_DRAWABLE_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gdk_drawable_impl_x11_finalize;
drawable_class->create_gc = _gdk_x11_gc_new;
drawable_class->draw_rectangle = gdk_x11_draw_rectangle;
drawable_class->draw_arc = gdk_x11_draw_arc;
drawable_class->draw_polygon = gdk_x11_draw_polygon;
drawable_class->draw_drawable_with_src = gdk_x11_draw_drawable;
drawable_class->draw_points = gdk_x11_draw_points;
drawable_class->draw_segments = gdk_x11_draw_segments;
drawable_class->draw_lines = gdk_x11_draw_lines;
drawable_class->draw_image = gdk_x11_draw_image;
drawable_class->draw_pixbuf = gdk_x11_draw_pixbuf;
drawable_class->ref_cairo_surface = gdk_x11_ref_cairo_surface;
drawable_class->set_colormap = gdk_x11_set_colormap;
drawable_class->get_colormap = gdk_x11_get_colormap;
drawable_class->get_depth = gdk_x11_get_depth;
drawable_class->get_screen = gdk_x11_get_screen;
drawable_class->get_visual = gdk_x11_get_visual;
drawable_class->_copy_to_image = _gdk_x11_copy_to_image;
}
static void
_gdk_drawable_impl_x11_init (GdkDrawableImplX11 *impl)
{
}
static void
gdk_drawable_impl_x11_finalize (GObject *object)
{
gdk_drawable_set_colormap (GDK_DRAWABLE (object), NULL);
G_OBJECT_CLASS (_gdk_drawable_impl_x11_parent_class)->finalize (object);
}
/**
* _gdk_x11_drawable_finish:
* @drawable: a #GdkDrawableImplX11.
*
* Performs necessary cleanup prior to freeing a pixmap or
* destroying a window.
**/
void
_gdk_x11_drawable_finish (GdkDrawable *drawable)
{
GdkDrawableImplX11 *impl = GDK_DRAWABLE_IMPL_X11 (drawable);
if (impl->picture)
{
XRenderFreePicture (GDK_SCREEN_XDISPLAY (impl->screen),
impl->picture);
impl->picture = None;
}
if (impl->cairo_surface)
{
cairo_surface_finish (impl->cairo_surface);
cairo_surface_set_user_data (impl->cairo_surface, &gdk_x11_cairo_key,
NULL, NULL);
}
}
/**
* _gdk_x11_drawable_update_size:
* @drawable: a #GdkDrawableImplX11.
*
* Updates the state of the drawable (in particular the drawable's
* cairo surface) when its size has changed.
**/
void
_gdk_x11_drawable_update_size (GdkDrawable *drawable)
{
GdkDrawableImplX11 *impl = GDK_DRAWABLE_IMPL_X11 (drawable);
if (impl->cairo_surface)
{
int width, height;
gdk_drawable_get_size (drawable, &width, &height);
cairo_xlib_surface_set_size (impl->cairo_surface, width, height);
}
}
static void
try_pixmap (Display *xdisplay,
int screen,
int depth)
{
Pixmap pixmap = XCreatePixmap (xdisplay,
RootWindow (xdisplay, screen),
1, 1, depth);
XFreePixmap (xdisplay, pixmap);
}
gboolean
_gdk_x11_have_render (GdkDisplay *display)
{
Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);
GdkDisplayX11 *x11display = GDK_DISPLAY_X11 (display);
if (x11display->have_render == GDK_UNKNOWN)
{
int event_base, error_base;
x11display->have_render =
XRenderQueryExtension (xdisplay, &event_base, &error_base)
? GDK_YES : GDK_NO;
if (x11display->have_render == GDK_YES)
{
/*
* Sun advertises RENDER, but fails to support 32-bit pixmaps.
* That is just no good. Therefore, we check all screens
* for proper support.
*/
int screen;
for (screen = 0; screen < ScreenCount (xdisplay); screen++)
{
int count;
int *depths = XListDepths (xdisplay, screen, &count);
gboolean has_8 = FALSE, has_32 = FALSE;
if (depths)
{
int i;
for (i = 0; i < count; i++)
{
if (depths[i] == 8)
has_8 = TRUE;
else if (depths[i] == 32)
has_32 = TRUE;
}
XFree (depths);
}
/* At this point, we might have a false positive;
* buggy versions of Xinerama only report depths for
* which there is an associated visual; so we actually
* go ahead and try create pixmaps.
*/
if (!(has_8 && has_32))
{
gdk_error_trap_push ();
if (!has_8)
try_pixmap (xdisplay, screen, 8);
if (!has_32)
try_pixmap (xdisplay, screen, 32);
XSync (xdisplay, False);
if (gdk_error_trap_pop () == 0)
{
has_8 = TRUE;
has_32 = TRUE;
}
}
if (!(has_8 && has_32))
{
g_warning ("The X server advertises that RENDER support is present,\n"
"but fails to supply the necessary pixmap support. In\n"
"other words, it is buggy.");
x11display->have_render = GDK_NO;
break;
}
}
}
}
return x11display->have_render == GDK_YES;
}
static Picture
gdk_x11_drawable_get_picture (GdkDrawable *drawable)
{
GdkDrawableImplX11 *impl = GDK_DRAWABLE_IMPL_X11 (drawable);
if (!impl->picture)
{
Display *xdisplay = GDK_SCREEN_XDISPLAY (impl->screen);
XRenderPictFormat *format;
GdkVisual *visual = gdk_drawable_get_visual (GDK_DRAWABLE_IMPL_X11 (drawable)->wrapper);
if (!visual)
return None;
format = XRenderFindVisualFormat (xdisplay, GDK_VISUAL_XVISUAL (visual));
if (format)
{
XRenderPictureAttributes attributes;
attributes.graphics_exposures = False;
impl->picture = XRenderCreatePicture (xdisplay, impl->xid, format,
CPGraphicsExposure, &attributes);
}
}
return impl->picture;
}
static void
gdk_x11_drawable_update_picture_clip (GdkDrawable *drawable,
GdkGC *gc)
{
GdkDrawableImplX11 *impl = GDK_DRAWABLE_IMPL_X11 (drawable);
Display *xdisplay = GDK_SCREEN_XDISPLAY (impl->screen);
Picture picture = gdk_x11_drawable_get_picture (drawable);
cairo_region_t *clip_region = gc ? _gdk_gc_get_clip_region (gc) : NULL;
if (clip_region)
{
XRectangle *rects;
int n_rects;
_gdk_region_get_xrectangles (clip_region,
gc->clip_x_origin,
gc->clip_y_origin,
&rects,
&n_rects);
XRenderSetPictureClipRectangles (xdisplay, picture,
0, 0, rects, n_rects);
g_free (rects);
}
else
{
XRenderPictureAttributes pa;
GdkBitmap *mask;
gulong pa_mask;
pa_mask = CPClipMask;
if (gc && (mask = _gdk_gc_get_clip_mask (gc)))
{
pa.clip_mask = GDK_PIXMAP_XID (mask);
pa.clip_x_origin = gc->clip_x_origin;
pa.clip_y_origin = gc->clip_y_origin;
pa_mask |= CPClipXOrigin | CPClipYOrigin;
}
else
pa.clip_mask = None;
XRenderChangePicture (xdisplay, picture,
pa_mask, &pa);
}
}
/*****************************************************
* X11 specific implementations of generic functions *
*****************************************************/
static GdkColormap*
gdk_x11_get_colormap (GdkDrawable *drawable)
{
GdkDrawableImplX11 *impl;
impl = GDK_DRAWABLE_IMPL_X11 (drawable);
return impl->colormap;
}
static void
gdk_x11_set_colormap (GdkDrawable *drawable,
GdkColormap *colormap)
{
GdkDrawableImplX11 *impl;
impl = GDK_DRAWABLE_IMPL_X11 (drawable);
if (impl->colormap == colormap)
return;
if (impl->colormap)
g_object_unref (impl->colormap);
impl->colormap = colormap;
if (impl->colormap)
g_object_ref (impl->colormap);
}
/* Drawing
*/
static void
gdk_x11_draw_rectangle (GdkDrawable *drawable,
GdkGC *gc,
gboolean filled,
gint x,
gint y,
gint width,
gint height)
{
GdkDrawableImplX11 *impl;
impl = GDK_DRAWABLE_IMPL_X11 (drawable);
if (filled)
XFillRectangle (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
GDK_GC_GET_XGC (gc), x, y, width, height);
else
XDrawRectangle (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
GDK_GC_GET_XGC (gc), x, y, width, height);
}
static void
gdk_x11_draw_arc (GdkDrawable *drawable,
GdkGC *gc,
gboolean filled,
gint x,
gint y,
gint width,
gint height,
gint angle1,
gint angle2)
{
GdkDrawableImplX11 *impl;
impl = GDK_DRAWABLE_IMPL_X11 (drawable);
if (filled)
XFillArc (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
GDK_GC_GET_XGC (gc), x, y, width, height, angle1, angle2);
else
XDrawArc (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
GDK_GC_GET_XGC (gc), x, y, width, height, angle1, angle2);
}
static void
gdk_x11_draw_polygon (GdkDrawable *drawable,
GdkGC *gc,
gboolean filled,
GdkPoint *points,
gint npoints)
{
XPoint *tmp_points;
gint tmp_npoints, i;
GdkDrawableImplX11 *impl;
impl = GDK_DRAWABLE_IMPL_X11 (drawable);
if (!filled &&
(points[0].x != points[npoints-1].x || points[0].y != points[npoints-1].y))
{
tmp_npoints = npoints + 1;
tmp_points = g_new (XPoint, tmp_npoints);
tmp_points[npoints].x = points[0].x;
tmp_points[npoints].y = points[0].y;
}
else
{
tmp_npoints = npoints;
tmp_points = g_new (XPoint, tmp_npoints);
}
for (i=0; i<npoints; i++)
{
tmp_points[i].x = points[i].x;
tmp_points[i].y = points[i].y;
}
if (filled)
XFillPolygon (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
GDK_GC_GET_XGC (gc), tmp_points, tmp_npoints, Complex, CoordModeOrigin);
else
XDrawLines (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
GDK_GC_GET_XGC (gc), tmp_points, tmp_npoints, CoordModeOrigin);
g_free (tmp_points);
}
static void
gdk_x11_draw_drawable (GdkDrawable *drawable,
GdkGC *gc,
GdkPixmap *src,
gint xsrc,
gint ysrc,
gint xdest,
gint ydest,
gint width,
gint height,
GdkDrawable *original_src)
{
int src_depth = gdk_drawable_get_depth (src);
int dest_depth = gdk_drawable_get_depth (drawable);
GdkDrawableImplX11 *impl;
GdkDrawableImplX11 *src_impl;
impl = GDK_DRAWABLE_IMPL_X11 (drawable);
if (GDK_IS_DRAWABLE_IMPL_X11 (src))
src_impl = GDK_DRAWABLE_IMPL_X11 (src);
else if (GDK_IS_WINDOW (src))
src_impl = GDK_DRAWABLE_IMPL_X11(((GdkWindowObject *)src)->impl);
else
src_impl = GDK_DRAWABLE_IMPL_X11(((GdkPixmapObject *)src)->impl);
if (GDK_IS_WINDOW_IMPL_X11 (impl) &&
GDK_IS_PIXMAP_IMPL_X11 (src_impl))
{
GdkPixmapImplX11 *src_pixmap = GDK_PIXMAP_IMPL_X11 (src_impl);
/* Work around an Xserver bug where non-visible areas from
* a pixmap to a window will clear the window background
* in destination areas that are supposed to be clipped out.
* This is a problem with client side windows as this means
* things may draw outside the virtual windows. This could
* also happen for window to window copies, but I don't
* think we generate any calls like that.
*
* See:
* http://lists.freedesktop.org/archives/xorg/2009-February/043318.html
*/
if (xsrc < 0)
{
width += xsrc;
xdest -= xsrc;
xsrc = 0;
}
if (ysrc < 0)
{
height += ysrc;
ydest -= ysrc;
ysrc = 0;
}
if (xsrc + width > src_pixmap->width)
width = src_pixmap->width - xsrc;
if (ysrc + height > src_pixmap->height)
height = src_pixmap->height - ysrc;
}
if (src_depth == 1)
{
XCopyArea (GDK_SCREEN_XDISPLAY (impl->screen),
src_impl->xid,
impl->xid,
GDK_GC_GET_XGC (gc),
xsrc, ysrc,
width, height,
xdest, ydest);
}
else if (dest_depth != 0 && src_depth == dest_depth)
{
XCopyArea (GDK_SCREEN_XDISPLAY (impl->screen),
src_impl->xid,
impl->xid,
GDK_GC_GET_XGC (gc),
xsrc, ysrc,
width, height,
xdest, ydest);
}
else
g_warning ("Attempt to draw a drawable with depth %d to a drawable with depth %d",
src_depth, dest_depth);
}
static void
gdk_x11_draw_points (GdkDrawable *drawable,
GdkGC *gc,
GdkPoint *points,
gint npoints)
{
GdkDrawableImplX11 *impl;
impl = GDK_DRAWABLE_IMPL_X11 (drawable);
/* We special-case npoints == 1, because X will merge multiple
* consecutive XDrawPoint requests into a PolyPoint request
*/
if (npoints == 1)
{
XDrawPoint (GDK_SCREEN_XDISPLAY (impl->screen),
impl->xid,
GDK_GC_GET_XGC (gc),
points[0].x, points[0].y);
}
else
{
gint i;
XPoint *tmp_points = g_new (XPoint, npoints);
for (i=0; i<npoints; i++)
{
tmp_points[i].x = points[i].x;
tmp_points[i].y = points[i].y;
}
XDrawPoints (GDK_SCREEN_XDISPLAY (impl->screen),
impl->xid,
GDK_GC_GET_XGC (gc),
tmp_points,
npoints,
CoordModeOrigin);
g_free (tmp_points);
}
}
static void
gdk_x11_draw_segments (GdkDrawable *drawable,
GdkGC *gc,
GdkSegment *segs,
gint nsegs)
{
GdkDrawableImplX11 *impl;
impl = GDK_DRAWABLE_IMPL_X11 (drawable);
/* We special-case nsegs == 1, because X will merge multiple
* consecutive XDrawLine requests into a PolySegment request
*/
if (nsegs == 1)
{
XDrawLine (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
GDK_GC_GET_XGC (gc), segs[0].x1, segs[0].y1,
segs[0].x2, segs[0].y2);
}
else
{
gint i;
XSegment *tmp_segs = g_new (XSegment, nsegs);
for (i=0; i<nsegs; i++)
{
tmp_segs[i].x1 = segs[i].x1;
tmp_segs[i].x2 = segs[i].x2;
tmp_segs[i].y1 = segs[i].y1;
tmp_segs[i].y2 = segs[i].y2;
}
XDrawSegments (GDK_SCREEN_XDISPLAY (impl->screen),
impl->xid,
GDK_GC_GET_XGC (gc),
tmp_segs, nsegs);
g_free (tmp_segs);
}
}
static void
gdk_x11_draw_lines (GdkDrawable *drawable,
GdkGC *gc,
GdkPoint *points,
gint npoints)
{
gint i;
XPoint *tmp_points = g_new (XPoint, npoints);
GdkDrawableImplX11 *impl;
impl = GDK_DRAWABLE_IMPL_X11 (drawable);
for (i=0; i<npoints; i++)
{
tmp_points[i].x = points[i].x;
tmp_points[i].y = points[i].y;
}
XDrawLines (GDK_SCREEN_XDISPLAY (impl->screen),
impl->xid,
GDK_GC_GET_XGC (gc),
tmp_points, npoints,
CoordModeOrigin);
g_free (tmp_points);
}
static void
gdk_x11_draw_image (GdkDrawable *drawable,
GdkGC *gc,
GdkImage *image,
gint xsrc,
gint ysrc,
gint xdest,
gint ydest,
gint width,
gint height)
{
GdkDrawableImplX11 *impl;
impl = GDK_DRAWABLE_IMPL_X11 (drawable);
#ifdef USE_SHM
if (image->type == GDK_IMAGE_SHARED)
XShmPutImage (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
GDK_GC_GET_XGC (gc), GDK_IMAGE_XIMAGE (image),
xsrc, ysrc, xdest, ydest, width, height, False);
else
#endif
XPutImage (GDK_SCREEN_XDISPLAY (impl->screen), impl->xid,
GDK_GC_GET_XGC (gc), GDK_IMAGE_XIMAGE (image),
xsrc, ysrc, xdest, ydest, width, height);
}
static gint
gdk_x11_get_depth (GdkDrawable *drawable)
{
/* This is a bit bogus but I'm not sure the other way is better */
return gdk_drawable_get_depth (GDK_DRAWABLE_IMPL_X11 (drawable)->wrapper);
}
static GdkDrawable *
get_impl_drawable (GdkDrawable *drawable)
{
if (GDK_IS_WINDOW (drawable))
return ((GdkWindowObject *)drawable)->impl;
else if (GDK_IS_PIXMAP (drawable))
return ((GdkPixmapObject *)drawable)->impl;
else
{
g_warning (G_STRLOC " drawable is not a pixmap or window");
return NULL;
}
}
static GdkScreen*
gdk_x11_get_screen (GdkDrawable *drawable)
{
if (GDK_IS_DRAWABLE_IMPL_X11 (drawable))
return GDK_DRAWABLE_IMPL_X11 (drawable)->screen;
else
return GDK_DRAWABLE_IMPL_X11 (get_impl_drawable (drawable))->screen;
}
static GdkVisual*
gdk_x11_get_visual (GdkDrawable *drawable)
{
return gdk_drawable_get_visual (GDK_DRAWABLE_IMPL_X11 (drawable)->wrapper);
}
/**
* gdk_x11_drawable_get_xdisplay:
* @drawable: a #GdkDrawable.
*
* Returns the display of a #GdkDrawable.
*
* Return value: an Xlib <type>Display*</type>.
**/
Display *
gdk_x11_drawable_get_xdisplay (GdkDrawable *drawable)
{
if (GDK_IS_DRAWABLE_IMPL_X11 (drawable))
return GDK_SCREEN_XDISPLAY (GDK_DRAWABLE_IMPL_X11 (drawable)->screen);
else
return GDK_SCREEN_XDISPLAY (GDK_DRAWABLE_IMPL_X11 (get_impl_drawable (drawable))->screen);
}
/**
* gdk_x11_drawable_get_xid:
* @drawable: a #GdkDrawable.
*
* Returns the X resource (window or pixmap) belonging to a #GdkDrawable.
*
* Return value: the ID of @drawable's X resource.
**/
XID
gdk_x11_drawable_get_xid (GdkDrawable *drawable)
{
GdkDrawable *impl;
if (GDK_IS_WINDOW (drawable))
{
GdkWindow *window = (GdkWindow *)drawable;
/* Try to ensure the window has a native window */
if (!_gdk_window_has_impl (window))
{
gdk_window_ensure_native (window);
/* We sync here to ensure the window is created in the Xserver when
* this function returns. This is required because the returned XID
* for this window must be valid immediately, even with another
* connection to the Xserver */
gdk_display_sync (gdk_drawable_get_display (window));
}
if (!GDK_WINDOW_IS_X11 (window))
{
g_warning (G_STRLOC " drawable is not a native X11 window");
return None;
}
impl = ((GdkWindowObject *)drawable)->impl;
}
else if (GDK_IS_PIXMAP (drawable))
impl = ((GdkPixmapObject *)drawable)->impl;
else
{
g_warning (G_STRLOC " drawable is not a pixmap or window");
return None;
}
return ((GdkDrawableImplX11 *)impl)->xid;
}
GdkDrawable *
gdk_x11_window_get_drawable_impl (GdkWindow *window)
{
return ((GdkWindowObject *)window)->impl;
}
GdkDrawable *
gdk_x11_pixmap_get_drawable_impl (GdkPixmap *pixmap)
{
return ((GdkPixmapObject *)pixmap)->impl;
}
/* Code for accelerated alpha compositing using the RENDER extension.
* It's a bit long because there are lots of possibilities for
* what's the fastest depending on the available picture formats,
* whether we can used shared pixmaps, etc.
*/
static GdkX11FormatType
select_format (GdkDisplay *display,
XRenderPictFormat **format,
XRenderPictFormat **mask)
{
Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);
XRenderPictFormat pf;
if (!_gdk_x11_have_render (display))
return GDK_X11_FORMAT_NONE;
/* Look for a 32-bit xRGB and Axxx formats that exactly match the
* in memory data format. We can use them as pixmap and mask
* to deal with non-premultiplied data.
*/
pf.type = PictTypeDirect;
pf.depth = 32;
pf.direct.redMask = 0xff;
pf.direct.greenMask = 0xff;
pf.direct.blueMask = 0xff;
pf.direct.alphaMask = 0;
if (ImageByteOrder (xdisplay) == LSBFirst)
{
/* ABGR */
pf.direct.red = 0;
pf.direct.green = 8;
pf.direct.blue = 16;
}
else
{
/* RGBA */
pf.direct.red = 24;
pf.direct.green = 16;
pf.direct.blue = 8;
}
*format = XRenderFindFormat (xdisplay,
(PictFormatType | PictFormatDepth |
PictFormatRedMask | PictFormatRed |
PictFormatGreenMask | PictFormatGreen |
PictFormatBlueMask | PictFormatBlue |
PictFormatAlphaMask),
&pf,
0);
pf.direct.alphaMask = 0xff;
if (ImageByteOrder (xdisplay) == LSBFirst)
{
/* ABGR */
pf.direct.alpha = 24;
}
else
{
pf.direct.alpha = 0;
}
*mask = XRenderFindFormat (xdisplay,
(PictFormatType | PictFormatDepth |
PictFormatAlphaMask | PictFormatAlpha),
&pf,
0);
if (*format && *mask)
return GDK_X11_FORMAT_EXACT_MASK;
/* OK, that failed, now look for xRGB and Axxx formats in
* RENDER's preferred order
*/
pf.direct.alphaMask = 0;
/* ARGB */
pf.direct.red = 16;
pf.direct.green = 8;
pf.direct.blue = 0;
*format = XRenderFindFormat (xdisplay,
(PictFormatType | PictFormatDepth |
PictFormatRedMask | PictFormatRed |
PictFormatGreenMask | PictFormatGreen |
PictFormatBlueMask | PictFormatBlue |
PictFormatAlphaMask),
&pf,
0);
pf.direct.alphaMask = 0xff;
pf.direct.alpha = 24;
*mask = XRenderFindFormat (xdisplay,
(PictFormatType | PictFormatDepth |
PictFormatAlphaMask | PictFormatAlpha),
&pf,
0);
if (*format && *mask)
return GDK_X11_FORMAT_ARGB_MASK;
/* Finally, if neither of the above worked, fall back to
* looking for combined ARGB -- we'll premultiply ourselves.
*/
pf.type = PictTypeDirect;
pf.depth = 32;
pf.direct.red = 16;
pf.direct.green = 8;
pf.direct.blue = 0;
pf.direct.alphaMask = 0xff;
pf.direct.alpha = 24;
*format = XRenderFindFormat (xdisplay,
(PictFormatType | PictFormatDepth |
PictFormatRedMask | PictFormatRed |
PictFormatGreenMask | PictFormatGreen |
PictFormatBlueMask | PictFormatBlue |
PictFormatAlphaMask | PictFormatAlpha),
&pf,
0);
*mask = NULL;
if (*format)
return GDK_X11_FORMAT_ARGB;
return GDK_X11_FORMAT_NONE;
}
#if 0
static void
list_formats (XRenderPictFormat *pf)
{
gint i;
for (i=0 ;; i++)
{
XRenderPictFormat *pf = XRenderFindFormat (impl->xdisplay, 0, NULL, i);
if (pf)
{
g_print ("%2d R-%#06x/%#06x G-%#06x/%#06x B-%#06x/%#06x A-%#06x/%#06x\n",
pf->depth,
pf->direct.red,
pf->direct.redMask,
pf->direct.green,
pf->direct.greenMask,
pf->direct.blue,
pf->direct.blueMask,
pf->direct.alpha,
pf->direct.alphaMask);
}
else
break;
}
}
#endif
void
_gdk_x11_convert_to_format (guchar *src_buf,
gint src_rowstride,
guchar *dest_buf,
gint dest_rowstride,
GdkX11FormatType dest_format,
GdkByteOrder dest_byteorder,
gint width,
gint height)
{
gint i;
for (i=0; i < height; i++)
{
switch (dest_format)
{
case GDK_X11_FORMAT_EXACT_MASK:
{
memcpy (dest_buf + i * dest_rowstride,
src_buf + i * src_rowstride,
width * 4);
break;
}
case GDK_X11_FORMAT_ARGB_MASK:
{
guchar *row = src_buf + i * src_rowstride;
if (((gsize)row & 3) != 0)
{
guchar *p = row;
guint32 *q = (guint32 *)(dest_buf + i * dest_rowstride);
guchar *end = p + 4 * width;
while (p < end)
{
*q = (p[3] << 24) | (p[0] << 16) | (p[1] << 8) | p[2];
p += 4;
q++;
}
}
else
{
guint32 *p = (guint32 *)row;
guint32 *q = (guint32 *)(dest_buf + i * dest_rowstride);
guint32 *end = p + width;
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
if (dest_byteorder == GDK_LSB_FIRST)
{
/* ABGR => ARGB */
while (p < end)
{
*q = ( (*p & 0xff00ff00) |
((*p & 0x000000ff) << 16) |
((*p & 0x00ff0000) >> 16));
q++;
p++;
}
}
else
{
/* ABGR => BGRA */
while (p < end)
{
*q = (((*p & 0xff000000) >> 24) |
((*p & 0x00ffffff) << 8));
q++;
p++;
}
}
#else /* G_BYTE_ORDER == G_BIG_ENDIAN */
if (dest_byteorder == GDK_LSB_FIRST)
{
/* RGBA => BGRA */
while (p < end)
{
*q = ( (*p & 0x00ff00ff) |
((*p & 0x0000ff00) << 16) |
((*p & 0xff000000) >> 16));
q++;
p++;
}
}
else
{
/* RGBA => ARGB */
while (p < end)
{
*q = (((*p & 0xffffff00) >> 8) |
((*p & 0x000000ff) << 24));
q++;
p++;
}
}
#endif /* G_BYTE_ORDER*/
}
break;
}
case GDK_X11_FORMAT_ARGB:
{
guchar *p = (src_buf + i * src_rowstride);
guchar *q = (dest_buf + i * dest_rowstride);
guchar *end = p + 4 * width;
guint t1,t2,t3;
#define MULT(d,c,a,t) G_STMT_START { t = c * a; d = ((t >> 8) + t) >> 8; } G_STMT_END
if (dest_byteorder == GDK_LSB_FIRST)
{
while (p < end)
{
MULT(q[0], p[2], p[3], t1);
MULT(q[1], p[1], p[3], t2);
MULT(q[2], p[0], p[3], t3);
q[3] = p[3];
p += 4;
q += 4;
}
}
else
{
while (p < end)
{
q[0] = p[3];
MULT(q[1], p[0], p[3], t1);
MULT(q[2], p[1], p[3], t2);
MULT(q[3], p[2], p[3], t3);
p += 4;
q += 4;
}
}
#undef MULT
break;
}
case GDK_X11_FORMAT_NONE:
g_assert_not_reached ();
break;
}
}
}
static void
draw_with_images (GdkDrawable *drawable,
GdkGC *gc,
GdkX11FormatType format_type,
XRenderPictFormat *format,
XRenderPictFormat *mask_format,
guchar *src_rgb,
gint src_rowstride,
gint dest_x,
gint dest_y,
gint width,
gint height)
{
GdkScreen *screen = GDK_DRAWABLE_IMPL_X11 (drawable)->screen;
Display *xdisplay = GDK_SCREEN_XDISPLAY (screen);
GdkImage *image;
GdkPixmap *pix;
GdkGC *pix_gc;
Picture pict;
Picture dest_pict;
Picture mask = None;
gint x0, y0;
pix = gdk_pixmap_new (gdk_screen_get_root_window (screen), width, height, 32);
pict = XRenderCreatePicture (xdisplay,
GDK_PIXMAP_XID (pix),
format, 0, NULL);
if (mask_format)
mask = XRenderCreatePicture (xdisplay,
GDK_PIXMAP_XID (pix),
mask_format, 0, NULL);
dest_pict = gdk_x11_drawable_get_picture (drawable);
pix_gc = _gdk_drawable_get_scratch_gc (pix, FALSE);
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);
image = _gdk_image_get_scratch (screen, width1, height1, 32, &xs0, &ys0);
_gdk_x11_convert_to_format (src_rgb + y0 * src_rowstride + 4 * x0, src_rowstride,
(guchar *)image->mem + ys0 * image->bpl + xs0 * image->bpp, image->bpl,
format_type, image->byte_order,
width1, height1);
gdk_draw_image (pix, pix_gc,
image, xs0, ys0, x0, y0, width1, height1);
}
}
XRenderComposite (xdisplay, PictOpOver, pict, mask, dest_pict,
0, 0, 0, 0, dest_x, dest_y, width, height);
XRenderFreePicture (xdisplay, pict);
if (mask)
XRenderFreePicture (xdisplay, mask);
g_object_unref (pix);
}
typedef struct _ShmPixmapInfo ShmPixmapInfo;
struct _ShmPixmapInfo
{
Display *display;
Pixmap pix;
Picture pict;
Picture mask;
};
static void
shm_pixmap_info_destroy (gpointer data)
{
ShmPixmapInfo *info = data;
if (info->pict != None)
XRenderFreePicture (info->display, info->pict);
if (info->mask != None)
XRenderFreePicture (info->display, info->mask);
g_free (data);
}
/* Returns FALSE if we can't get a shm pixmap */
static gboolean
get_shm_pixmap_for_image (Display *xdisplay,
GdkImage *image,
XRenderPictFormat *format,
XRenderPictFormat *mask_format,
Pixmap *pix,
Picture *pict,
Picture *mask)
{
ShmPixmapInfo *info;
if (image->type != GDK_IMAGE_SHARED)
return FALSE;
info = g_object_get_data (G_OBJECT (image), "gdk-x11-shm-pixmap");
if (!info)
{
*pix = _gdk_x11_image_get_shm_pixmap (image);
if (!*pix)
return FALSE;
info = g_new (ShmPixmapInfo, 1);
info->display = xdisplay;
info->pix = *pix;
info->pict = XRenderCreatePicture (xdisplay, info->pix,
format, 0, NULL);
if (mask_format)
info->mask = XRenderCreatePicture (xdisplay, info->pix,
mask_format, 0, NULL);
else
info->mask = None;
g_object_set_data_full (G_OBJECT (image), "gdk-x11-shm-pixmap", info,
shm_pixmap_info_destroy);
}
*pix = info->pix;
*pict = info->pict;
*mask = info->mask;
return TRUE;
}
#ifdef USE_SHM
/* Returns FALSE if drawing with ShmPixmaps is not possible */
static gboolean
draw_with_pixmaps (GdkDrawable *drawable,
GdkGC *gc,
GdkX11FormatType format_type,
XRenderPictFormat *format,
XRenderPictFormat *mask_format,
guchar *src_rgb,
gint src_rowstride,
gint dest_x,
gint dest_y,
gint width,
gint height)
{
Display *xdisplay = GDK_SCREEN_XDISPLAY (GDK_DRAWABLE_IMPL_X11 (drawable)->screen);
GdkImage *image;
Pixmap pix;
Picture pict;
Picture dest_pict;
Picture mask = None;
gint x0, y0;
dest_pict = gdk_x11_drawable_get_picture (drawable);
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);
image = _gdk_image_get_scratch (GDK_DRAWABLE_IMPL_X11 (drawable)->screen,
width1, height1, 32, &xs0, &ys0);
if (!get_shm_pixmap_for_image (xdisplay, image, format, mask_format, &pix, &pict, &mask))
return FALSE;
_gdk_x11_convert_to_format (src_rgb + y0 * src_rowstride + 4 * x0, src_rowstride,
(guchar *)image->mem + ys0 * image->bpl + xs0 * image->bpp, image->bpl,
format_type, image->byte_order,
width1, height1);
XRenderComposite (xdisplay, PictOpOver, pict, mask, dest_pict,
xs0, ys0, xs0, ys0, x0 + dest_x, y0 + dest_y,
width1, height1);
}
}
return TRUE;
}
#endif
static void
gdk_x11_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)
{
GdkX11FormatType format_type;
XRenderPictFormat *format, *mask_format;
gint rowstride;
#ifdef USE_SHM
gboolean use_pixmaps = TRUE;
#endif /* USE_SHM */
format_type = select_format (gdk_drawable_get_display (drawable),
&format, &mask_format);
if (format_type == GDK_X11_FORMAT_NONE ||
!gdk_pixbuf_get_has_alpha (pixbuf) ||
gdk_drawable_get_depth (drawable) == 1 ||
(dither == GDK_RGB_DITHER_MAX && gdk_drawable_get_depth (drawable) != 24) ||
gdk_x11_drawable_get_picture (drawable) == None)
{
GdkDrawable *wrapper = GDK_DRAWABLE_IMPL_X11 (drawable)->wrapper;
GDK_DRAWABLE_CLASS (_gdk_drawable_impl_x11_parent_class)->draw_pixbuf (wrapper, gc, pixbuf,
src_x, src_y, dest_x, dest_y,
width, height,
dither, x_dither, y_dither);
return;
}
gdk_x11_drawable_update_picture_clip (drawable, gc);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
#ifdef USE_SHM
if (use_pixmaps)
{
if (!draw_with_pixmaps (drawable, gc,
format_type, format, mask_format,
gdk_pixbuf_get_pixels (pixbuf) + src_y * rowstride + src_x * 4,
rowstride,
dest_x, dest_y, width, height))
use_pixmaps = FALSE;
}
if (!use_pixmaps)
#endif /* USE_SHM */
draw_with_images (drawable, gc,
format_type, format, mask_format,
gdk_pixbuf_get_pixels (pixbuf) + src_y * rowstride + src_x * 4,
rowstride,
dest_x, dest_y, width, height);
}
static void
gdk_x11_cairo_surface_destroy (void *data)
{
GdkDrawableImplX11 *impl = data;
impl->cairo_surface = NULL;
}
void
_gdk_windowing_set_cairo_surface_size (cairo_surface_t *surface,
int width,
int height)
{
cairo_xlib_surface_set_size (surface, width, height);
}
cairo_surface_t *
_gdk_windowing_create_cairo_surface (GdkDrawable *drawable,
int width,
int height)
{
GdkDrawableImplX11 *impl = GDK_DRAWABLE_IMPL_X11 (drawable);
GdkVisual *visual;
visual = gdk_drawable_get_visual (drawable);
if (visual)
return cairo_xlib_surface_create (GDK_SCREEN_XDISPLAY (impl->screen),
impl->xid,
GDK_VISUAL_XVISUAL (visual),
width, height);
else if (gdk_drawable_get_depth (drawable) == 1)
return cairo_xlib_surface_create_for_bitmap (GDK_SCREEN_XDISPLAY (impl->screen),
impl->xid,
GDK_SCREEN_XSCREEN (impl->screen),
width, height);
else
{
g_warning ("Using Cairo rendering requires the drawable argument to\n"
"have a specified colormap. All windows have a colormap,\n"
"however, pixmaps only have colormap by default if they\n"
"were created with a non-NULL window argument. Otherwise\n"
"a colormap must be set on them with gdk_drawable_set_colormap");
return NULL;
}
}
static cairo_surface_t *
gdk_x11_ref_cairo_surface (GdkDrawable *drawable)
{
GdkDrawableImplX11 *impl = GDK_DRAWABLE_IMPL_X11 (drawable);
if (GDK_IS_WINDOW_IMPL_X11 (drawable) &&
GDK_WINDOW_DESTROYED (impl->wrapper))
return NULL;
if (!impl->cairo_surface)
{
int width, height;
gdk_drawable_get_size (drawable, &width, &height);
impl->cairo_surface = _gdk_windowing_create_cairo_surface (drawable, width, height);
if (impl->cairo_surface)
cairo_surface_set_user_data (impl->cairo_surface, &gdk_x11_cairo_key,
drawable, gdk_x11_cairo_surface_destroy);
}
else
cairo_surface_reference (impl->cairo_surface);
return impl->cairo_surface;
}
#define __GDK_DRAWABLE_X11_C__
#include "gdkaliasdef.c"
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