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gtk/gdk/win32/gdkimage-win32.c

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
* Copyright (C) 1998-2002 Tor Lillqvist
*
* 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 "gdkimage.h"
#include "gdkpixmap.h"
#include "gdkscreen.h" /* gdk_screen_get_default() */
#include "gdkprivate-win32.h"
static GList *image_list = NULL;
static gpointer parent_class = NULL;
static void gdk_win32_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);
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 = NULL;
}
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_win32_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_win32_image_destroy (image);
}
}
GdkImage *
_gdk_win32_setup_pixmap_image (GdkPixmap *pixmap,
GdkWindow *window,
gint width,
gint height,
gint depth,
guchar *bits)
{
GdkImage *image;
image = g_object_new (gdk_image_get_type (), NULL);
image->windowing_data = pixmap;
image->type = GDK_IMAGE_SHARED;
image->visual = gdk_drawable_get_visual (window);
image->byte_order = GDK_LSB_FIRST;
image->width = width;
image->height = height;
image->depth = depth;
switch (depth)
{
case 1:
case 4:
case 5:
case 6:
case 7:
case 8:
image->bpp = 1;
break;
case 15:
case 16:
image->bpp = 2;
break;
case 24:
image->bpp = 3;
break;
case 32:
image->bpp = 4;
break;
default:
g_warning ("_gdk_win32_setup_pixmap_image: depth=%d", image->depth);
g_assert_not_reached ();
}
if (depth == 1)
image->bpl = ((width - 1)/32 + 1)*4;
else if (depth == 4)
image->bpl = ((width - 1)/8 + 1)*4;
else
image->bpl = ((width*image->bpp - 1)/4 + 1)*4;
image->bits_per_pixel = image->depth;
image->mem = bits;
return image;
}
GdkImage *
gdk_image_new_bitmap (GdkVisual *visual,
gpointer data,
gint w,
gint h)
{
GdkPixmap *pixmap;
GdkImage *image;
gint data_bpl = (w-1)/8 + 1;
gint i;
pixmap = gdk_pixmap_new (NULL, w, h, 1);
if (pixmap == NULL)
return NULL;
image = GDK_PIXMAP_IMPL_WIN32 (GDK_PIXMAP_OBJECT (pixmap)->impl)->image;
GDK_NOTE (IMAGE, g_print ("gdk_image_new_bitmap: %dx%d=%p\n",
w, h, GDK_PIXMAP_HBITMAP (pixmap)));
if (data_bpl != image->bpl)
{
for (i = 0; i < h; i++)
memmove ((guchar *) image->mem + i*image->bpl, ((guchar *) data) + i*data_bpl, data_bpl);
}
else
memmove (image->mem, data, data_bpl*h);
return image;
}
void
_gdk_windowing_image_init (void)
{
/* Nothing needed AFAIK */
}
GdkImage*
_gdk_image_new_for_depth (GdkScreen *screen,
GdkImageType type,
GdkVisual *visual,
gint width,
gint height,
gint depth)
{
GdkPixmap *pixmap;
g_return_val_if_fail (!visual || GDK_IS_VISUAL (visual), NULL);
g_return_val_if_fail (visual || depth != -1, NULL);
g_return_val_if_fail (screen == gdk_screen_get_default (), NULL);
if (visual)
depth = visual->depth;
pixmap = gdk_pixmap_new (NULL, width, height, depth);
if (pixmap == NULL)
return NULL;
GDK_NOTE (IMAGE, g_print ("_gdk_image_new_for_depth: %dx%dx%d=%p\n",
width, height, depth, GDK_PIXMAP_HBITMAP (pixmap)));
return GDK_PIXMAP_IMPL_WIN32 (GDK_PIXMAP_OBJECT (pixmap)->impl)->image;
}
GdkImage*
_gdk_win32_copy_to_image (GdkDrawable *drawable,
GdkImage *image,
gint src_x,
gint src_y,
gint dest_x,
gint dest_y,
gint width,
gint height)
{
GdkGC *gc;
GdkScreen *screen = gdk_drawable_get_screen (drawable);
g_return_val_if_fail (GDK_IS_DRAWABLE_IMPL_WIN32 (drawable), NULL);
g_return_val_if_fail (image != NULL || (dest_x == 0 && dest_y == 0), NULL);
GDK_NOTE (IMAGE, g_print ("_gdk_win32_copy_to_image: %p\n",
GDK_DRAWABLE_HANDLE (drawable)));
if (!image)
image = _gdk_image_new_for_depth (screen, GDK_IMAGE_FASTEST, NULL, width, height,
gdk_drawable_get_depth (drawable));
gc = gdk_gc_new ((GdkDrawable *) image->windowing_data);
_gdk_win32_blit
(FALSE,
GDK_DRAWABLE_IMPL_WIN32 (GDK_PIXMAP_OBJECT (image->windowing_data)->impl),
gc, drawable, src_x, src_y, dest_x, dest_y, width, height);
gdk_gc_unref (gc);
return image;
}
guint32
gdk_image_get_pixel (GdkImage *image,
gint x,
gint y)
{
guchar *pixelp;
g_return_val_if_fail (image != NULL, 0);
g_return_val_if_fail (x >= 0 && x < image->width, 0);
g_return_val_if_fail (y >= 0 && y < image->height, 0);
if (!(x >= 0 && x < image->width && y >= 0 && y < image->height))
return 0;
if (image->depth == 1)
return (((guchar *) image->mem)[y * image->bpl + (x >> 3)] & (1 << (7 - (x & 0x7)))) != 0;
if (image->depth == 4)
{
pixelp = (guchar *) image->mem + y * image->bpl + (x >> 1);
if (x&1)
return (*pixelp) & 0x0F;
return (*pixelp) >> 4;
}
pixelp = (guchar *) image->mem + y * image->bpl + x * image->bpp;
switch (image->bpp)
{
case 1:
return *pixelp;
/* Windows is always LSB, no need to check image->byte_order. */
case 2:
return pixelp[0] | (pixelp[1] << 8);
case 3:
return pixelp[0] | (pixelp[1] << 8) | (pixelp[2] << 16);
case 4:
return pixelp[0] | (pixelp[1] << 8) | (pixelp[2] << 16);
}
g_assert_not_reached ();
return 0;
}
void
gdk_image_put_pixel (GdkImage *image,
gint x,
gint y,
guint32 pixel)
{
guchar *pixelp;
g_return_if_fail (image != NULL);
g_return_if_fail (x >= 0 && x < image->width);
g_return_if_fail (y >= 0 && y < image->height);
if (!(x >= 0 && x < image->width && y >= 0 && y < image->height))
return;
GdiFlush ();
if (image->depth == 1)
if (pixel & 1)
((guchar *) image->mem)[y * image->bpl + (x >> 3)] |= (1 << (7 - (x & 0x7)));
else
((guchar *) image->mem)[y * image->bpl + (x >> 3)] &= ~(1 << (7 - (x & 0x7)));
else if (image->depth == 4)
{
pixelp = (guchar *) image->mem + y * image->bpl + (x >> 1);
if (x&1)
{
*pixelp &= 0xF0;
*pixelp |= (pixel & 0x0F);
}
else
{
*pixelp &= 0x0F;
*pixelp |= (pixel << 4);
}
}
else
{
pixelp = (guchar *) image->mem + y * image->bpl + x * image->bpp;
/* Windows is always LSB, no need to check image->byte_order. */
switch (image->bpp)
{
case 4:
pixelp[3] = 0;
case 3:
pixelp[2] = ((pixel >> 16) & 0xFF);
case 2:
pixelp[1] = ((pixel >> 8) & 0xFF);
case 1:
pixelp[0] = (pixel & 0xFF);
}
}
}
static void
gdk_win32_image_destroy (GdkImage *image)
{
GdkPixmap *pixmap;
g_return_if_fail (GDK_IS_IMAGE (image));
pixmap = image->windowing_data;
if (pixmap == NULL) /* This means that _gdk_image_exit()
* destroyed the image already, and
* now we're called a second time from
* _finalize()
*/
return;
GDK_NOTE (IMAGE, g_print ("gdk_win32_image_destroy: %p\n",
GDK_PIXMAP_HBITMAP (pixmap)));
gdk_pixmap_unref (pixmap);
image->windowing_data = NULL;
}
gint
_gdk_windowing_get_bits_for_depth (GdkDisplay *display,
gint depth)
{
g_return_val_if_fail (display == gdk_display_get_default (), 0);
switch (depth)
{
case 1:
return 1;
case 2:
case 3:
case 4:
return 4;
case 5:
case 6:
case 7:
case 8:
return 8;
case 15:
case 16:
return 16;
case 24:
return 24;
case 32:
return 32;
}
g_assert_not_reached ();
return 0;
}
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