gtk2/gdk/x11/gdkimage-x11.c
Owen Taylor d12c9702a4 Private function to tell if we have RENDER extension.
Thu Jan  3 22:18:15 2002  Owen Taylor  <otaylor@redhat.com>

	* gdk/x11/gdkdrawable-x11.c gdk/x11/gdkprivate-x11.h
	(_gdk_x11_have_render): Private function to tell if we have RENDER
	extension.

	* gdk/x11/gdkgc-x11.c (_gdk_x11_gc_get_fg_picture): Return
	None if we don't have RENDER extension.

	* gdk/x11/gdkpango-x11.c (gdk_pango_context_get): Don't
	use Xft unless we have render extension.

	* gdk/x11/gdkdrawable-x11.c (gdk_x11_drawable_get_picture):
	Handle missing render extension.

	* gdk/gdkdraw.c gdk/gdkdrawable.h gdk/gdkpixmap.c gdk/gdkwindow.c
	gdk/gdkinternals.h: Add a private copy_to_image() virtual function
	to the GdkDrawable vtable that extends get_image() to allow
	copying onto existing images.  Make the default implementation of
	get_image() use this so that backends don't have to implement
	both. Add private wrapper _gdk_drawable_copy_to_image().

	* gdk/x11/gdkimage-x11.c gdk/x11/gdkprivate-x11.c
	gdk/x11/gdkdrawable-x11.c (_gdk_x11_copy_to_image): Implement
	copy_to_image() semantics, speed up by using ShmPixmaps and
	XCopyArea when possible, XFlush() after ungrabbing the server,
	generally redo the logic once again.

	* gdk/gdkinternals.h gdk/x11/gdkimage-x11.c
	_gdk_windowing_bits_per_depth(): Function to convert from depth to
	bits-per-pixel. (We assume only one bpp per depth - X requires
	this.)

	* gdk/gdkinternals.h gdk/gdkrgb.c gdk/gdkimage.c: Move the GdkRGB
	scratch image code into a generic _gdk_image_get_scratch() chunk
	of code that we can use other places we need scratch images.

	* gdk/gdkimage.c gdk/x11/gdkimage.c gdk/gdkinternals.h:
	Add _gdk_image_new_for_depth() as the backend
	to _gdk_image_new() to allowing creating images with
	a depth and no visual.

	* gdk/gdkpixbuf-drawable.c: Fix so that getting
	parts of images not at 0,0 actually works.

	* gdk/gdkdrawable.h gdk/gdkinternals.h gdk/gdkdraw.c
	gdk/gdkwindow.c gdk/gdkpixmap.c gdk/gdkpixbuf-render.c:
	 - Add a new GdkDrawableClass vfunc _draw_pixbuf, and
	  _gdk_draw_pixbuf() [ will be made public later ], to allow
	  backends to accelerate drawing pixbufs.
	 - Move the implementation of gdk_pixbuf_render_to_drawable_alpha()
	   to be the default implementation.
	 - Update docs for gdk_pixbuf_render_to_drawable_alpha().
	 - Optimize the default implementation by using
	   _gdk_image_copy_to_pixmap() and scratch shared images, and
	   special casing the compositing.

	* gdk/x11/gdkdrawable-x11.c: Accelerate _gdk_draw_pixbuf()
	with alpha using the RENDER extension.

        * gdk/gdkpixbuf-drawable.c (gdk_pixbuf_get_from_drawable):
	Optimize by _gdk_image_copy_to_pixmap() and scratch images.

	* tests/testrgb.c: Add test for speed of alpha composition,
	reduce the number of iterations since alpha composition
	can be a bit slow.

	* gdk/x11/gdkimage-x11.c gdk/gdkprivate-x11.h (_gdk_x11_image_get_shm_pixmap):
	Private function to get a ShmPixmap for an image, if possible.
2002-01-04 05:58:01 +00:00

779 lines
19 KiB
C

/* GDK - The 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 <stdlib.h>
#include <sys/types.h>
#if defined (HAVE_IPC_H) && defined (HAVE_SHM_H) && defined (HAVE_XSHM_H)
#define USE_SHM
#endif
#ifdef USE_SHM
#include <sys/ipc.h>
#include <sys/shm.h>
#endif /* USE_SHM */
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#ifdef USE_SHM
#include <X11/extensions/XShm.h>
#endif /* USE_SHM */
#include <errno.h>
#include "gdk.h" /* For gdk_error_trap_* / gdk_flush_* */
#include "gdkimage.h"
#include "gdkprivate.h"
#include "gdkprivate-x11.h"
typedef struct _GdkImagePrivateX11 GdkImagePrivateX11;
struct _GdkImagePrivateX11
{
XImage *ximage;
Display *xdisplay;
gpointer x_shm_info;
Pixmap shm_pixmap;
};
static GList *image_list = NULL;
static gpointer parent_class = NULL;
static gboolean have_shm_pixmaps;
static void gdk_x11_image_destroy (GdkImage *image);
static void gdk_image_init (GdkImage *image);
static void gdk_image_class_init (GdkImageClass *klass);
static void gdk_image_finalize (GObject *object);
#define PRIVATE_DATA(image) ((GdkImagePrivateX11 *) GDK_IMAGE (image)->windowing_data)
GType
gdk_image_get_type (void)
{
static GType object_type = 0;
if (!object_type)
{
static const GTypeInfo object_info =
{
sizeof (GdkImageClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gdk_image_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GdkImage),
0, /* n_preallocs */
(GInstanceInitFunc) gdk_image_init,
};
object_type = g_type_register_static (G_TYPE_OBJECT,
"GdkImage",
&object_info, 0);
}
return object_type;
}
static void
gdk_image_init (GdkImage *image)
{
image->windowing_data = g_new0 (GdkImagePrivateX11, 1);
}
static void
gdk_image_class_init (GdkImageClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gdk_image_finalize;
}
static void
gdk_image_finalize (GObject *object)
{
GdkImage *image = GDK_IMAGE (object);
gdk_x11_image_destroy (image);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
void
_gdk_image_exit (void)
{
GdkImage *image;
while (image_list)
{
image = image_list->data;
gdk_x11_image_destroy (image);
}
}
GdkImage *
gdk_image_new_bitmap(GdkVisual *visual, gpointer data, gint w, gint h)
/*
* Desc: create a new bitmap image
*/
{
Visual *xvisual;
GdkImage *image;
GdkImagePrivateX11 *private;
image = g_object_new (gdk_image_get_type (), NULL);
private = PRIVATE_DATA (image);
private->xdisplay = gdk_display;
image->type = GDK_IMAGE_NORMAL;
image->visual = visual;
image->width = w;
image->height = h;
image->depth = 1;
image->bits_per_pixel = 1;
xvisual = ((GdkVisualPrivate*) visual)->xvisual;
private->ximage = XCreateImage(private->xdisplay, xvisual, 1, XYBitmap,
0, 0, w ,h, 8, 0);
private->ximage->data = data;
private->ximage->bitmap_bit_order = MSBFirst;
private->ximage->byte_order = MSBFirst;
image->byte_order = MSBFirst;
image->mem = private->ximage->data;
image->bpl = private->ximage->bytes_per_line;
image->bpp = 1;
return(image);
} /* gdk_image_new_bitmap() */
static int
gdk_image_check_xshm(Display *display)
/*
* Desc: query the server for support for the MIT_SHM extension
* Return: 0 = not available
* 1 = shared XImage support available
* 2 = shared Pixmap support available also
*/
{
#ifdef USE_SHM
int major, minor, ignore;
Bool pixmaps;
if (XQueryExtension(display, "MIT-SHM", &ignore, &ignore, &ignore))
{
if (XShmQueryVersion(display, &major, &minor, &pixmaps )==True)
{
return (pixmaps==True) ? 2 : 1;
}
}
#endif /* USE_SHM */
return 0;
}
void
_gdk_windowing_image_init (void)
{
if (_gdk_use_xshm)
{
gint res = gdk_image_check_xshm (gdk_display);
if (!res)
_gdk_use_xshm = FALSE;
else
have_shm_pixmaps = (res == 2);
}
}
GdkImage*
_gdk_image_new_for_depth (GdkImageType type,
GdkVisual *visual,
gint width,
gint height,
gint depth)
{
GdkImage *image;
GdkImagePrivateX11 *private;
#ifdef USE_SHM
XShmSegmentInfo *x_shm_info;
#endif /* USE_SHM */
Visual *xvisual = NULL;
g_return_val_if_fail (!visual || GDK_IS_VISUAL (visual), NULL);
g_return_val_if_fail (visual || depth != -1, NULL);
if (visual)
depth = visual->depth;
switch (type)
{
case GDK_IMAGE_FASTEST:
image = _gdk_image_new_for_depth (GDK_IMAGE_SHARED, visual, width, height, depth);
if (!image)
image = _gdk_image_new_for_depth (GDK_IMAGE_NORMAL, visual, width, height, depth);
break;
default:
image = g_object_new (gdk_image_get_type (), NULL);
private = PRIVATE_DATA (image);
private->xdisplay = gdk_display;
image->type = type;
image->visual = visual;
image->width = width;
image->height = height;
image->depth = depth;
if (visual)
xvisual = ((GdkVisualPrivate*) visual)->xvisual;
switch (type)
{
case GDK_IMAGE_SHARED:
#ifdef USE_SHM
if (_gdk_use_xshm)
{
private->x_shm_info = g_new (XShmSegmentInfo, 1);
x_shm_info = private->x_shm_info;
x_shm_info->shmid = -1;
x_shm_info->shmaddr = (char*) -1;
private->ximage = XShmCreateImage (private->xdisplay, xvisual, depth,
ZPixmap, NULL, x_shm_info, width, height);
if (private->ximage == NULL)
{
g_warning ("XShmCreateImage failed");
_gdk_use_xshm = FALSE;
goto error;
}
x_shm_info->shmid = shmget (IPC_PRIVATE,
private->ximage->bytes_per_line * private->ximage->height,
IPC_CREAT | 0600);
if (x_shm_info->shmid == -1)
{
/* EINVAL indicates, most likely, that the segment we asked for
* is bigger than SHMMAX, so we don't treat it as a permanent
* error. ENOSPC and ENOMEM may also indicate this, but
* more likely are permanent errors.
*/
if (errno != EINVAL)
{
g_warning ("shmget failed: error %d (%s)", errno, g_strerror (errno));
_gdk_use_xshm = FALSE;
}
goto error;
}
x_shm_info->readOnly = False;
x_shm_info->shmaddr = shmat (x_shm_info->shmid, 0, 0);
private->ximage->data = x_shm_info->shmaddr;
if (x_shm_info->shmaddr == (char*) -1)
{
g_warning ("shmat failed: error %d (%s)", errno, g_strerror (errno));
/* Failure in shmat is almost certainly permanent. Most likely error is
* EMFILE, which would mean that we've exceeded the per-process
* Shm segment limit.
*/
_gdk_use_xshm = FALSE;
goto error;
}
gdk_error_trap_push ();
XShmAttach (private->xdisplay, x_shm_info);
XSync (private->xdisplay, False);
if (gdk_error_trap_pop ())
{
/* this is the common failure case so omit warning */
_gdk_use_xshm = FALSE;
goto error;
}
/* We mark the segment as destroyed so that when
* the last process detaches, it will be deleted.
* There is a small possibility of leaking if
* we die in XShmAttach. In theory, a signal handler
* could be set up.
*/
shmctl (x_shm_info->shmid, IPC_RMID, 0);
if (image)
image_list = g_list_prepend (image_list, image);
}
else
#endif /* USE_SHM */
goto error;
break;
case GDK_IMAGE_NORMAL:
private->ximage = XCreateImage (private->xdisplay, xvisual, depth,
ZPixmap, 0, 0, width, height, 32, 0);
/* Use malloc, not g_malloc here, because X will call free()
* on this data
*/
private->ximage->data = malloc (private->ximage->bytes_per_line *
private->ximage->height);
if (!private->ximage->data)
goto error;
break;
case GDK_IMAGE_FASTEST:
g_assert_not_reached ();
}
if (image)
{
image->byte_order = (private->ximage->byte_order == LSBFirst) ? GDK_LSB_FIRST : GDK_MSB_FIRST;
image->mem = private->ximage->data;
image->bpl = private->ximage->bytes_per_line;
image->bpp = (private->ximage->bits_per_pixel + 7) / 8;
image->bits_per_pixel = private->ximage->bits_per_pixel;
}
}
return image;
error:
if (private->ximage)
{
XDestroyImage (private->ximage);
private->ximage = NULL;
}
#ifdef USE_SHM
if (private->x_shm_info)
{
x_shm_info = private->x_shm_info;
if (x_shm_info->shmaddr != (char *)-1)
shmdt (x_shm_info->shmaddr);
if (x_shm_info->shmid != -1)
shmctl (x_shm_info->shmid, IPC_RMID, 0);
g_free (x_shm_info);
private->x_shm_info = NULL;
}
#endif /* USE_SHM */
g_object_unref (image);
return NULL;
}
Pixmap
_gdk_x11_image_get_shm_pixmap (GdkImage *image)
{
GdkImagePrivateX11 *private = PRIVATE_DATA (image);
#ifdef USE_SHM
/* Future: do we need one of these per-screen per-image? ShmPixmaps
* are the same for every screen, but can they be shared?
*/
if (!private->shm_pixmap && image->type == GDK_IMAGE_SHARED && have_shm_pixmaps)
private->shm_pixmap = XShmCreatePixmap (private->xdisplay, _gdk_root_window,
image->mem, private->x_shm_info,
image->width, image->height, image->depth);
return private->shm_pixmap;
#else
return None;
#endif
}
GdkImage*
gdk_image_new (GdkImageType type,
GdkVisual *visual,
gint width,
gint height)
{
return _gdk_image_new_for_depth (type, visual, width, height, -1);
}
GdkImage*
get_full_image (GdkDrawable *drawable,
gint src_x,
gint src_y,
gint width,
gint height)
{
GdkImage *image;
GdkImagePrivateX11 *private;
GdkDrawableImplX11 *impl;
XImage *ximage;
impl = GDK_DRAWABLE_IMPL_X11 (drawable);
ximage = XGetImage (impl->xdisplay,
impl->xid,
src_x, src_y, width, height,
AllPlanes, ZPixmap);
if (!ximage)
return NULL;
image = g_object_new (gdk_image_get_type (), NULL);
private = PRIVATE_DATA (image);
private->xdisplay = gdk_display;
private->ximage = ximage;
image->type = GDK_IMAGE_NORMAL;
image->visual = gdk_drawable_get_visual (drawable); /* could be NULL */
image->width = width;
image->height = height;
image->depth = gdk_drawable_get_depth (drawable);
image->mem = private->ximage->data;
image->bpl = private->ximage->bytes_per_line;
image->bits_per_pixel = private->ximage->bits_per_pixel;
image->bpp = (private->ximage->bits_per_pixel + 7) / 8;
image->byte_order = (private->ximage->byte_order == LSBFirst) ? GDK_LSB_FIRST : GDK_MSB_FIRST;
return image;
}
GdkImage*
_gdk_x11_copy_to_image (GdkDrawable *drawable,
GdkImage *image,
gint src_x,
gint src_y,
gint dest_x,
gint dest_y,
gint width,
gint height)
{
GdkImagePrivateX11 *private;
GdkDrawableImplX11 *impl;
GdkVisual *visual;
gboolean have_grab;
GdkRectangle req;
GdkRectangle window_rect;
Pixmap shm_pixmap = None;
gboolean success = TRUE;
g_return_val_if_fail (GDK_IS_DRAWABLE_IMPL_X11 (drawable), NULL);
g_return_val_if_fail (image != NULL || (dest_x == 0 && dest_y == 0), NULL);
visual = gdk_drawable_get_visual (drawable);
impl = GDK_DRAWABLE_IMPL_X11 (drawable);
have_grab = FALSE;
#define UNGRAB() G_STMT_START { \
if (have_grab) { \
gdk_x11_ungrab_server (); \
XFlush (impl->xdisplay); \
have_grab = FALSE; } \
} G_STMT_END
if (!image && !GDK_IS_WINDOW_IMPL_X11 (drawable))
return get_full_image (drawable, src_x, src_y, width, height);
if (image && image->type == GDK_IMAGE_SHARED)
{
shm_pixmap = _gdk_x11_image_get_shm_pixmap (image);
if (shm_pixmap)
{
/* Again easy, we can just XCopyArea, and don't have to worry about clipping
*/
GC xgc = XCreateGC (impl->xdisplay, impl->xid, 0, NULL);
XCopyArea (impl->xdisplay, impl->xid, shm_pixmap, xgc,
src_x, src_y, width, height, dest_x, dest_y);
XSync (impl->xdisplay, FALSE);
XFreeGC (impl->xdisplay, xgc);
return image;
}
}
/* Now the general case - we may have to worry about clipping to the screen
* bounds, in which case we'll have to grab the server and only get a piece
* of the window.
*/
if (GDK_IS_WINDOW_IMPL_X11 (drawable))
{
GdkRectangle screen_rect;
Window child;
have_grab = TRUE;
gdk_x11_grab_server ();
/* Translate screen area into window coordinates */
XTranslateCoordinates (gdk_display,
_gdk_root_window,
impl->xid,
0, 0,
&screen_rect.x, &screen_rect.y,
&child);
screen_rect.width = gdk_screen_width ();
screen_rect.height = gdk_screen_height ();
gdk_error_trap_push ();
window_rect.x = 0;
window_rect.y = 0;
gdk_window_get_geometry (GDK_WINDOW (impl->wrapper),
NULL, NULL,
&window_rect.width,
&window_rect.height,
NULL);
/* compute intersection of screen and window, in window
* coordinates
*/
if (gdk_error_trap_pop () ||
!gdk_rectangle_intersect (&window_rect, &screen_rect,
&window_rect))
goto out;
}
else
{
window_rect.x = 0;
window_rect.y = 0;
gdk_drawable_get_size (drawable,
&window_rect.width,
&window_rect.height);
}
req.x = src_x;
req.y = src_y;
req.width = width;
req.height = height;
/* window_rect specifies the part of drawable which we can get from
* the server in window coordinates.
* For pixmaps this is all of the pixmap, for windows it is just
* the onscreen part.
*/
if (!gdk_rectangle_intersect (&req, &window_rect, &req))
goto out;
private = PRIVATE_DATA (image);
gdk_error_trap_push ();
if (!image &&
req.x == src_x && req.y == src_y && req.width == width && req.height == height)
{
image = get_full_image (drawable, src_x, src_y, width, height);
if (!image)
success = FALSE;
}
else
{
gboolean created_image = FALSE;
if (!image)
{
image = _gdk_image_new_for_depth (GDK_IMAGE_NORMAL, visual, width, height,
gdk_drawable_get_depth (drawable));
created_image = TRUE;
}
/* In the ShmImage but no ShmPixmap case, we could use XShmGetImage when
* we are getting the entire image.
*/
if (XGetSubImage (impl->xdisplay,
impl->xid,
req.x, req.y, req.width, req.height,
AllPlanes, ZPixmap,
private->ximage,
dest_x + req.x - src_x, dest_y + req.y - src_y) == None)
{
if (created_image)
g_object_unref (image);
image = NULL;
success = FALSE;
}
}
out:
if (have_grab)
{
gdk_x11_ungrab_server ();
XFlush (impl->xdisplay);
have_grab = FALSE;
}
gdk_error_trap_pop ();
if (success && !image)
{
/* We "succeeded", but could get no content for the image so return junk */
image = _gdk_image_new_for_depth (GDK_IMAGE_NORMAL, visual, width, height,
gdk_drawable_get_depth (drawable));
}
return image;
}
guint32
gdk_image_get_pixel (GdkImage *image,
gint x,
gint y)
{
guint32 pixel;
GdkImagePrivateX11 *private;
g_return_val_if_fail (GDK_IS_IMAGE (image), 0);
private = PRIVATE_DATA (image);
pixel = XGetPixel (private->ximage, x, y);
return pixel;
}
void
gdk_image_put_pixel (GdkImage *image,
gint x,
gint y,
guint32 pixel)
{
GdkImagePrivateX11 *private;
g_return_if_fail (GDK_IS_IMAGE (image));
private = PRIVATE_DATA (image);
pixel = XPutPixel (private->ximage, x, y, pixel);
}
static void
gdk_x11_image_destroy (GdkImage *image)
{
GdkImagePrivateX11 *private;
#ifdef USE_SHM
XShmSegmentInfo *x_shm_info;
#endif /* USE_SHM */
g_return_if_fail (GDK_IS_IMAGE (image));
private = PRIVATE_DATA (image);
if (private == NULL) /* This means that _gdk_image_exit() destroyed the
* image already, and now we're called a second
* time from _finalize()
*/
return;
if (private->ximage) /* Deal with failure of creation */
{
switch (image->type)
{
case GDK_IMAGE_NORMAL:
XDestroyImage (private->ximage);
break;
case GDK_IMAGE_SHARED:
#ifdef USE_SHM
gdk_flush();
if (private->shm_pixmap)
XFreePixmap (private->xdisplay, private->shm_pixmap);
image_list = g_list_remove (image_list, image);
XShmDetach (private->xdisplay, private->x_shm_info);
XDestroyImage (private->ximage);
x_shm_info = private->x_shm_info;
shmdt (x_shm_info->shmaddr);
g_free (private->x_shm_info);
private->x_shm_info = NULL;
#else /* USE_SHM */
g_error ("trying to destroy shared memory image when gdk was compiled without shared memory support");
#endif /* USE_SHM */
break;
case GDK_IMAGE_FASTEST:
g_assert_not_reached ();
}
}
g_free (private);
image->windowing_data = NULL;
}
Display *
gdk_x11_image_get_xdisplay (GdkImage *image)
{
GdkImagePrivateX11 *private;
g_return_val_if_fail (GDK_IS_IMAGE (image), NULL);
private = PRIVATE_DATA (image);
return private->xdisplay;
}
XImage *
gdk_x11_image_get_ximage (GdkImage *image)
{
GdkImagePrivateX11 *private;
g_return_val_if_fail (GDK_IS_IMAGE (image), NULL);
private = PRIVATE_DATA (image);
return private->ximage;
}
gint
_gdk_windowing_get_bits_for_depth (gint depth)
{
XPixmapFormatValues *formats;
gint count, i;
formats = XListPixmapFormats (gdk_display, &count);
for (i = 0; i < count; i++)
if (formats[i].depth == depth)
{
gint result = formats[i].bits_per_pixel;
XFree (formats);
return result;
}
g_assert_not_reached ();
return -1;
}