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397 lines
9.4 KiB
C
397 lines
9.4 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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* Copyright (C) 1998-2002 Tor Lillqvist
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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 "gdkimage.h"
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#include "gdkpixmap.h"
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#include "gdkscreen.h" /* gdk_screen_get_default() */
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#include "gdkprivate-win32.h"
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static GList *image_list = NULL;
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static gpointer parent_class = NULL;
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static void gdk_win32_image_destroy (GdkImage *image);
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static void gdk_image_init (GdkImage *image);
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static void gdk_image_class_init (GdkImageClass *klass);
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static void gdk_image_finalize (GObject *object);
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GType
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gdk_image_get_type (void)
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{
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static GType object_type = 0;
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if (!object_type)
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{
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const GTypeInfo object_info =
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{
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sizeof (GdkImageClass),
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(GBaseInitFunc) NULL,
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(GBaseFinalizeFunc) NULL,
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(GClassInitFunc) gdk_image_class_init,
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NULL, /* class_finalize */
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NULL, /* class_data */
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sizeof (GdkImage),
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0, /* n_preallocs */
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(GInstanceInitFunc) gdk_image_init,
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};
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object_type = g_type_register_static (G_TYPE_OBJECT,
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"GdkImage",
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&object_info, 0);
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}
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return object_type;
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}
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static void
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gdk_image_init (GdkImage *image)
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{
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image->windowing_data = NULL;
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}
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static void
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gdk_image_class_init (GdkImageClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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parent_class = g_type_class_peek_parent (klass);
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object_class->finalize = gdk_image_finalize;
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}
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static void
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gdk_image_finalize (GObject *object)
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{
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GdkImage *image = GDK_IMAGE (object);
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gdk_win32_image_destroy (image);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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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_win32_image_destroy (image);
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}
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}
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/*
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* Create a GdkImage _without_ an associated GdkPixmap. The caller is
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* responsible for creating a GdkPixmap object and making the association.
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*/
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static GdkImage *
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_gdk_win32_new_image (GdkVisual *visual,
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gint width,
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gint height,
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gint depth,
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guchar *bits)
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{
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GdkImage *image;
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image = g_object_new (gdk_image_get_type (), NULL);
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image->windowing_data = NULL;
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image->type = GDK_IMAGE_SHARED;
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image->visual = visual;
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image->byte_order = GDK_LSB_FIRST;
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image->width = width;
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image->height = height;
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image->depth = depth;
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image->bits_per_pixel = _gdk_windowing_get_bits_for_depth (gdk_display_get_default (), depth);
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switch (depth)
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{
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case 1:
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case 4:
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case 5:
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case 6:
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case 7:
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case 8:
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image->bpp = 1;
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break;
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case 15:
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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 = image->bits_per_pixel / 8;
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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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default:
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g_warning ("_gdk_win32_new_image: depth=%d", image->depth);
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g_assert_not_reached ();
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}
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if (depth == 1)
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image->bpl = ((width - 1)/32 + 1)*4;
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else if (depth == 4)
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image->bpl = ((width - 1)/8 + 1)*4;
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else
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image->bpl = ((width*image->bpp - 1)/4 + 1)*4;
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image->mem = bits;
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return image;
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}
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void
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_gdk_windowing_image_init (void)
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{
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/* Nothing needed AFAIK */
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}
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GdkImage*
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_gdk_image_new_for_depth (GdkScreen *screen,
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GdkImageType type,
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GdkVisual *visual,
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gint width,
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gint height,
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gint depth)
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{
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GdkPixmap *pixmap;
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GdkImage *image;
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guchar *bits;
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g_return_val_if_fail (!visual || GDK_IS_VISUAL (visual), NULL);
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g_return_val_if_fail (visual || depth != -1, NULL);
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g_return_val_if_fail (screen == gdk_screen_get_default (), NULL);
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if (visual)
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depth = visual->depth;
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pixmap = gdk_pixmap_new (NULL, width, height, depth);
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if (pixmap == NULL)
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return NULL;
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GDK_NOTE (IMAGE, g_print ("_gdk_image_new_for_depth: %dx%dx%d=%p\n",
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width, height, depth, GDK_PIXMAP_HBITMAP (pixmap)));
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bits = GDK_PIXMAP_IMPL_WIN32 (GDK_PIXMAP_OBJECT (pixmap)->impl)->bits;
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image = _gdk_win32_new_image (visual, width, height, depth, bits);
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image->windowing_data = pixmap;
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return image;
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}
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GdkImage*
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_gdk_win32_copy_to_image (GdkDrawable *drawable,
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GdkImage *image,
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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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{
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GdkGC *gc;
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GdkScreen *screen = gdk_drawable_get_screen (drawable);
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g_return_val_if_fail (GDK_IS_DRAWABLE_IMPL_WIN32 (drawable), NULL);
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g_return_val_if_fail (image != NULL || (dest_x == 0 && dest_y == 0), NULL);
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GDK_NOTE (IMAGE, g_print ("_gdk_win32_copy_to_image: %p\n",
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GDK_DRAWABLE_HANDLE (drawable)));
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if (!image)
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image = _gdk_image_new_for_depth (screen, GDK_IMAGE_FASTEST, NULL, width, height,
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gdk_drawable_get_depth (drawable));
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gc = gdk_gc_new ((GdkDrawable *) image->windowing_data);
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_gdk_win32_blit
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(FALSE,
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GDK_DRAWABLE_IMPL_WIN32 (GDK_PIXMAP_OBJECT (image->windowing_data)->impl),
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gc, drawable, src_x, src_y, dest_x, dest_y, width, height);
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g_object_unref (gc);
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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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guchar *pixelp;
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g_return_val_if_fail (image != NULL, 0);
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g_return_val_if_fail (x >= 0 && x < image->width, 0);
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g_return_val_if_fail (y >= 0 && y < image->height, 0);
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if (!(x >= 0 && x < image->width && y >= 0 && y < image->height))
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return 0;
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if (image->depth == 1)
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return (((guchar *) image->mem)[y * image->bpl + (x >> 3)] & (1 << (7 - (x & 0x7)))) != 0;
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if (image->depth == 4)
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{
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pixelp = (guchar *) image->mem + y * image->bpl + (x >> 1);
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if (x&1)
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return (*pixelp) & 0x0F;
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return (*pixelp) >> 4;
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}
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pixelp = (guchar *) image->mem + y * image->bpl + x * image->bpp;
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switch (image->bpp)
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{
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case 1:
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return *pixelp;
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/* Windows is always LSB, no need to check image->byte_order. */
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case 2:
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return pixelp[0] | (pixelp[1] << 8);
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case 3:
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return pixelp[0] | (pixelp[1] << 8) | (pixelp[2] << 16);
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case 4:
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return pixelp[0] | (pixelp[1] << 8) | (pixelp[2] << 16);
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}
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g_assert_not_reached ();
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return 0;
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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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guchar *pixelp;
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g_return_if_fail (image != NULL);
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g_return_if_fail (x >= 0 && x < image->width);
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g_return_if_fail (y >= 0 && y < image->height);
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if (!(x >= 0 && x < image->width && y >= 0 && y < image->height))
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return;
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GdiFlush ();
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if (image->depth == 1)
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if (pixel & 1)
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((guchar *) image->mem)[y * image->bpl + (x >> 3)] |= (1 << (7 - (x & 0x7)));
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else
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((guchar *) image->mem)[y * image->bpl + (x >> 3)] &= ~(1 << (7 - (x & 0x7)));
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else if (image->depth == 4)
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{
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pixelp = (guchar *) image->mem + y * image->bpl + (x >> 1);
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if (x&1)
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{
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*pixelp &= 0xF0;
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*pixelp |= (pixel & 0x0F);
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}
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else
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{
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*pixelp &= 0x0F;
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*pixelp |= (pixel << 4);
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}
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}
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else
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{
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pixelp = (guchar *) image->mem + y * image->bpl + x * image->bpp;
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/* Windows is always LSB, no need to check image->byte_order. */
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switch (image->bpp)
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{
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case 4:
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pixelp[3] = 0;
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case 3:
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pixelp[2] = ((pixel >> 16) & 0xFF);
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case 2:
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pixelp[1] = ((pixel >> 8) & 0xFF);
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case 1:
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pixelp[0] = (pixel & 0xFF);
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}
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}
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}
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static void
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gdk_win32_image_destroy (GdkImage *image)
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{
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GdkPixmap *pixmap;
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g_return_if_fail (GDK_IS_IMAGE (image));
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pixmap = image->windowing_data;
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if (pixmap == NULL) /* This means that _gdk_image_exit()
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* destroyed the image already, and
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* now we're called a second time from
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* _finalize()
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*/
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return;
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GDK_NOTE (IMAGE, g_print ("gdk_win32_image_destroy: %p\n",
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GDK_PIXMAP_HBITMAP (pixmap)));
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g_object_unref (pixmap);
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image->windowing_data = NULL;
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}
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gint
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_gdk_windowing_get_bits_for_depth (GdkDisplay *display,
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gint depth)
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{
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g_return_val_if_fail (display == gdk_display_get_default (), 0);
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switch (depth)
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{
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case 1:
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return 1;
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case 2:
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case 3:
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case 4:
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return 4;
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case 5:
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case 6:
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case 7:
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case 8:
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return 8;
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case 15:
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case 16:
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return 16;
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case 24:
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case 32:
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return 32;
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}
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g_assert_not_reached ();
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return 0;
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}
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