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d1045b6876
Mon Dec 7 13:38:06 1998 Owen Taylor <otaylor@redhat.com> * gdk/gdkimage.c (gdk_image_new): Use IPC_RMID _after_ doing XShmAttach. This should work everywhere, and avoid the need for signal handlers or configure checks.
506 lines
12 KiB
C
506 lines
12 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 Library 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library 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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#include "config.h"
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#include <stdlib.h>
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#include <sys/types.h>
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#if defined (HAVE_IPC_H) && defined (HAVE_SHM_H) && defined (HAVE_XSHM_H)
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#define USE_SHM
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#endif
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#ifdef USE_SHM
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#endif /* USE_SHM */
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#ifdef USE_SHM
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#include <X11/extensions/XShm.h>
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#endif /* USE_SHM */
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#include "gdk.h"
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#include "gdkprivate.h"
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static void gdk_image_put_normal (GdkDrawable *drawable,
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GdkGC *gc,
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GdkImage *image,
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gint xsrc,
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gint ysrc,
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gint xdest,
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gint ydest,
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gint width,
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gint height);
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static void gdk_image_put_shared (GdkDrawable *drawable,
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GdkGC *gc,
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GdkImage *image,
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gint xsrc,
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gint ysrc,
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gint xdest,
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gint ydest,
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gint width,
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gint height);
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static GList *image_list = NULL;
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void
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gdk_image_exit (void)
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{
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GdkImage *image;
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while (image_list)
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{
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image = image_list->data;
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gdk_image_destroy (image);
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}
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}
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GdkImage *
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gdk_image_new_bitmap(GdkVisual *visual, gpointer data, gint w, gint h)
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/*
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* Desc: create a new bitmap image
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*/
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{
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Visual *xvisual;
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GdkImage *image;
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GdkImagePrivate *private;
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private = g_new(GdkImagePrivate, 1);
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image = (GdkImage *) private;
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private->xdisplay = gdk_display;
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private->image_put = gdk_image_put_normal;
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image->type = GDK_IMAGE_NORMAL;
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image->visual = visual;
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image->width = w;
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image->height = h;
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image->depth = 1;
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xvisual = ((GdkVisualPrivate*) visual)->xvisual;
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private->ximage = XCreateImage(private->xdisplay, xvisual, 1, XYBitmap,
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0, 0, w ,h, 8, 0);
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private->ximage->data = data;
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private->ximage->bitmap_bit_order = MSBFirst;
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private->ximage->byte_order = MSBFirst;
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image->byte_order = MSBFirst;
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image->mem = private->ximage->data;
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image->bpl = private->ximage->bytes_per_line;
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image->bpp = 1;
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return(image);
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} /* gdk_image_new_bitmap() */
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static int
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gdk_image_check_xshm(Display *display)
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/*
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* Desc: query the server for support for the MIT_SHM extension
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* Return: 0 = not available
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* 1 = shared XImage support available
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* 2 = shared Pixmap support available also
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*/
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{
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#ifdef USE_SHM
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int major, minor, ignore;
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Bool pixmaps;
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if (XQueryExtension(display, "MIT-SHM", &ignore, &ignore, &ignore))
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{
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if (XShmQueryVersion(display, &major, &minor, &pixmaps )==True)
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{
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return (pixmaps==True) ? 2 : 1;
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}
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}
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#endif /* USE_SHM */
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return 0;
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}
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void
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gdk_image_init (void)
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{
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if (gdk_use_xshm)
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{
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if (!gdk_image_check_xshm (gdk_display))
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{
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gdk_use_xshm = False;
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}
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}
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}
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GdkImage*
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gdk_image_new (GdkImageType type,
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GdkVisual *visual,
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gint width,
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gint height)
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{
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GdkImage *image;
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GdkImagePrivate *private;
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#ifdef USE_SHM
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XShmSegmentInfo *x_shm_info;
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#endif /* USE_SHM */
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Visual *xvisual;
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switch (type)
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{
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case GDK_IMAGE_FASTEST:
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image = gdk_image_new (GDK_IMAGE_SHARED, visual, width, height);
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if (!image)
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image = gdk_image_new (GDK_IMAGE_NORMAL, visual, width, height);
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break;
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default:
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private = g_new (GdkImagePrivate, 1);
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image = (GdkImage*) private;
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private->xdisplay = gdk_display;
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private->image_put = NULL;
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image->type = type;
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image->visual = visual;
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image->width = width;
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image->height = height;
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image->depth = visual->depth;
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xvisual = ((GdkVisualPrivate*) visual)->xvisual;
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switch (type)
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{
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case GDK_IMAGE_SHARED:
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#ifdef USE_SHM
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if (gdk_use_xshm)
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{
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private->image_put = gdk_image_put_shared;
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private->x_shm_info = g_new (XShmSegmentInfo, 1);
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x_shm_info = private->x_shm_info;
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private->ximage = XShmCreateImage (private->xdisplay, xvisual, visual->depth,
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ZPixmap, NULL, x_shm_info, width, height);
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if (private->ximage == NULL)
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{
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g_warning ("XShmCreateImage failed");
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g_free (image);
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gdk_use_xshm = False;
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return NULL;
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}
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x_shm_info->shmid = shmget (IPC_PRIVATE,
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private->ximage->bytes_per_line * private->ximage->height,
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IPC_CREAT | 0777);
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if (x_shm_info->shmid == -1)
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{
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g_warning ("shmget failed!");
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XDestroyImage (private->ximage);
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g_free (private->x_shm_info);
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g_free (image);
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gdk_use_xshm = False;
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return NULL;
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}
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x_shm_info->readOnly = False;
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x_shm_info->shmaddr = shmat (x_shm_info->shmid, 0, 0);
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private->ximage->data = x_shm_info->shmaddr;
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if (x_shm_info->shmaddr == (char*) -1)
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{
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g_warning ("shmat failed!");
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XDestroyImage (private->ximage);
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shmctl (x_shm_info->shmid, IPC_RMID, 0);
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g_free (private->x_shm_info);
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g_free (image);
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return NULL;
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}
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gdk_error_code = 0;
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gdk_error_warnings = 0;
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XShmAttach (private->xdisplay, x_shm_info);
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XSync (private->xdisplay, False);
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gdk_error_warnings = 1;
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if (gdk_error_code == -1)
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{
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/* this is the common failure case so omit warning */
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XDestroyImage (private->ximage);
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shmdt (x_shm_info->shmaddr);
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shmctl (x_shm_info->shmid, IPC_RMID, 0);
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g_free (private->x_shm_info);
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g_free (image);
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gdk_use_xshm = False;
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return NULL;
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}
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/* We mark the segment as destroyed so that when
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* the last process detaches, it will be deleted.
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* There is a small possibility of leaking if
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* we die in XShmAttach. In theory, a signal handler
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* could be set up.
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*/
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shmctl (x_shm_info->shmid, IPC_RMID, 0);
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if (image)
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image_list = g_list_prepend (image_list, image);
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}
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else
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{
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g_free (image);
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return NULL;
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}
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break;
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#else /* USE_SHM */
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g_free (image);
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return NULL;
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#endif /* USE_SHM */
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case GDK_IMAGE_NORMAL:
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private->image_put = gdk_image_put_normal;
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private->ximage = XCreateImage (private->xdisplay, xvisual, visual->depth,
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ZPixmap, 0, 0, width, height, 32, 0);
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/* Use malloc, not g_malloc here, because X will call free()
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* on this data
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*/
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private->ximage->data = malloc (private->ximage->bytes_per_line *
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private->ximage->height);
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break;
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case GDK_IMAGE_FASTEST:
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g_assert_not_reached ();
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}
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if (image)
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{
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image->byte_order = private->ximage->byte_order;
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image->mem = private->ximage->data;
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image->bpl = private->ximage->bytes_per_line;
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switch (private->ximage->bits_per_pixel)
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{
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case 8:
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image->bpp = 1;
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break;
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case 16:
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image->bpp = 2;
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break;
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case 24:
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image->bpp = 3;
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break;
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case 32:
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image->bpp = 4;
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break;
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}
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}
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}
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return image;
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}
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GdkImage*
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gdk_image_get (GdkWindow *window,
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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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GdkImage *image;
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GdkImagePrivate *private;
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GdkWindowPrivate *win_private;
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g_return_val_if_fail (window != NULL, NULL);
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win_private = (GdkWindowPrivate *) window;
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if (win_private->destroyed)
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return NULL;
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private = g_new (GdkImagePrivate, 1);
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image = (GdkImage*) private;
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private->xdisplay = gdk_display;
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private->image_put = gdk_image_put_normal;
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private->ximage = XGetImage (private->xdisplay,
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win_private->xwindow,
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x, y, width, height,
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AllPlanes, ZPixmap);
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image->type = GDK_IMAGE_NORMAL;
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image->visual = gdk_window_get_visual (window);
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image->width = width;
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image->height = height;
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image->depth = private->ximage->depth;
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image->mem = private->ximage->data;
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image->bpl = private->ximage->bytes_per_line;
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image->bpp = private->ximage->bits_per_pixel;
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image->byte_order = private->ximage->byte_order;
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return image;
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}
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guint32
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gdk_image_get_pixel (GdkImage *image,
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gint x,
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gint y)
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{
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guint32 pixel;
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GdkImagePrivate *private;
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g_return_val_if_fail (image != NULL, 0);
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private = (GdkImagePrivate *) image;
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pixel = XGetPixel (private->ximage, x, y);
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return pixel;
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}
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void
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gdk_image_put_pixel (GdkImage *image,
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gint x,
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gint y,
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guint32 pixel)
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{
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GdkImagePrivate *private;
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g_return_if_fail (image != NULL);
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private = (GdkImagePrivate *) image;
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pixel = XPutPixel (private->ximage, x, y, pixel);
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}
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void
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gdk_image_destroy (GdkImage *image)
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{
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GdkImagePrivate *private;
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#ifdef USE_SHM
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XShmSegmentInfo *x_shm_info;
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#endif /* USE_SHM */
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g_return_if_fail (image != NULL);
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private = (GdkImagePrivate*) image;
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switch (image->type)
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{
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case GDK_IMAGE_NORMAL:
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XDestroyImage (private->ximage);
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break;
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case GDK_IMAGE_SHARED:
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#ifdef USE_SHM
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gdk_flush();
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XShmDetach (private->xdisplay, private->x_shm_info);
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XDestroyImage (private->ximage);
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x_shm_info = private->x_shm_info;
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shmdt (x_shm_info->shmaddr);
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g_free (private->x_shm_info);
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image_list = g_list_remove (image_list, image);
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#else /* USE_SHM */
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g_error ("trying to destroy shared memory image when gdk was compiled without shared memory support");
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#endif /* USE_SHM */
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break;
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case GDK_IMAGE_FASTEST:
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g_assert_not_reached ();
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}
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g_free (image);
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}
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static void
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gdk_image_put_normal (GdkDrawable *drawable,
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GdkGC *gc,
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GdkImage *image,
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gint xsrc,
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gint ysrc,
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gint xdest,
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gint ydest,
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gint width,
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gint height)
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{
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GdkWindowPrivate *drawable_private;
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GdkImagePrivate *image_private;
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GdkGCPrivate *gc_private;
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g_return_if_fail (drawable != NULL);
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g_return_if_fail (image != NULL);
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g_return_if_fail (gc != NULL);
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drawable_private = (GdkWindowPrivate*) drawable;
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if (drawable_private->destroyed)
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return;
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image_private = (GdkImagePrivate*) image;
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gc_private = (GdkGCPrivate*) gc;
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g_return_if_fail (image->type == GDK_IMAGE_NORMAL);
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XPutImage (drawable_private->xdisplay, drawable_private->xwindow,
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gc_private->xgc, image_private->ximage,
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xsrc, ysrc, xdest, ydest, width, height);
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}
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static void
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gdk_image_put_shared (GdkDrawable *drawable,
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GdkGC *gc,
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GdkImage *image,
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gint xsrc,
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gint ysrc,
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gint xdest,
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gint ydest,
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gint width,
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gint height)
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{
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#ifdef USE_SHM
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GdkWindowPrivate *drawable_private;
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GdkImagePrivate *image_private;
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GdkGCPrivate *gc_private;
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g_return_if_fail (drawable != NULL);
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g_return_if_fail (image != NULL);
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g_return_if_fail (gc != NULL);
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drawable_private = (GdkWindowPrivate*) drawable;
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if (drawable_private->destroyed)
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return;
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image_private = (GdkImagePrivate*) image;
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gc_private = (GdkGCPrivate*) gc;
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g_return_if_fail (image->type == GDK_IMAGE_SHARED);
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XShmPutImage (drawable_private->xdisplay, drawable_private->xwindow,
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gc_private->xgc, image_private->ximage,
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xsrc, ysrc, xdest, ydest, width, height, False);
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#else /* USE_SHM */
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g_error ("trying to draw shared memory image when gdk was compiled without shared memory support");
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#endif /* USE_SHM */
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}
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