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Fix includes. (gdk_pixbuf_get_from_drawable): Implemented the zillion

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1999-12-08  Federico Mena Quintero  <federico@redhat.com>

	* gdk-pixbuf/gdk-pixbuf-drawable.c: Fix includes.
	(gdk_pixbuf_get_from_drawable): Implemented the zillion sanity
	checks and API definition.  The body needs filling in and it needs
	to do the Right Thing(tm) for pixmaps plus the given colormap and
	windows and their own colormaps.

	* gdk-pixbuf/gdk-pixbuf.h: Added prototype for
	gdk_pixbuf_get_from_drawable().  Killed gdk-pixbuf-drawable.h.

	* gdk-pixbuf/Makefile.am: Re-added the gdk-pixbuf-drawable sources.

	* doc/tmpl/from-drawables.sgml: Populated.

	* doc/gdk-pixbuf.sgml: Added the from-drawables section.

	* doc/Makefile.am (tmpl_sources): Added tmpl/from-drawables.sgml.

	* doc/gdk-pixbuf-sections.txt: Added a section for getting pixbufs
	from drawables.
This commit is contained in:
Federico Mena Quintero 1999-12-08 21:17:53 +00:00 committed by Arturo Espinosa
parent a70843bab2
commit c6f25c2de8
11 changed files with 444 additions and 212 deletions
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1
docs/reference/gdk-pixbuf/Makefile.am
View File

@ -19,6 +19,7 @@ TARGET_DIR=$(HTML_DIR)/$(DOC_MODULE)
tmpl_sources = \
tmpl/creating.sgml \
tmpl/file-loading.sgml \
tmpl/from-drawables.sgml \
tmpl/gdk-pixbuf-loader.sgml \
tmpl/gdk-pixbuf-unused.sgml \
tmpl/gdk-pixbuf.sgml \

5
docs/reference/gdk-pixbuf/gdk-pixbuf-sections.txt
View File

@ -40,6 +40,11 @@ gdk_pixbuf_render_to_drawable
gdk_pixbuf_render_threshold_alpha
</SECTION>
<SECTION>
<FILE>from-drawables</FILE>
gdk_pixbuf_get_from_drawable
</SECTION>
<SECTION>
<FILE>util</FILE>
gdk_pixbuf_add_alpha

2
docs/reference/gdk-pixbuf/gdk-pixbuf.sgml
View File

@ -4,6 +4,7 @@
<!entity gdk-pixbuf-file-loading SYSTEM "sgml/file-loading.sgml">
<!entity gdk-pixbuf-creating SYSTEM "sgml/creating.sgml">
<!entity gdk-pixbuf-rendering SYSTEM "sgml/rendering.sgml">
<!entity gdk-pixbuf-from-drawables SYSTEM "sgml/from-drawables.sgml">
<!entity gdk-pixbuf-util SYSTEM "sgml/util.sgml">
<!entity GnomeCanvasPixbuf SYSTEM "sgml/gnome-canvas-pixbuf.sgml">
<!entity GdkPixbufLoader SYSTEM "sgml/gdk-pixbuf-loader.sgml">
@ -47,6 +48,7 @@
&gdk-pixbuf-file-loading;
&gdk-pixbuf-creating;
&gdk-pixbuf-rendering;
&gdk-pixbuf-from-drawables;
&gdk-pixbuf-util;
&GnomeCanvasPixbuf;
&GdkPixbufLoader;

45
docs/reference/gdk-pixbuf/tmpl/from-drawables.sgml Normal file
View File

@ -0,0 +1,45 @@
<!-- ##### SECTION Title ##### -->
Drawables to Pixbufs
<!-- ##### SECTION Short_Description ##### -->
Getting parts of a drawable's image data into a pixbuf.
<!-- ##### SECTION Long_Description ##### -->
<para>
The functions in this section allow you to take the image data
from a GDK drawable and dump it into a #GdkPixbuf. This can be
used for screenshots and other special effects. Note that these
operations can be expensive, since the image data has to be
transferred from the X server to the client program and converted.
</para>
<!-- ##### SECTION See_Also ##### -->
<para>
#GdkPixbuf, gdk_image_get()
</para>
<!-- ##### FUNCTION gdk_pixbuf_get_from_drawable ##### -->
<para>
</para>
@dest:
@src:
@cmap:
@src_x:
@src_y:
@dest_x:
@dest_y:
@width:
@height:
@Returns:
<!--
Local variables:
mode: sgml
sgml-parent-document: ("../gdk-pixbuf.sgml" "book" "refsect2" "")
End:
-->

3
docs/reference/gdk-pixbuf/tmpl/rendering.sgml
View File

@ -2,7 +2,7 @@
Rendering
<!-- ##### SECTION Short_Description ##### -->
Rendering a Pixbuf to a GDK Drawable.
Rendering a pixbuf to a GDK drawable.
<!-- ##### SECTION Long_Description ##### -->
<para>
@ -97,7 +97,6 @@ In the future it will do full alpha compositing.
@width:
@height:
@alpha_threshold:
<!--
Local variables:
mode: sgml

3
docs/reference/gdk-pixbuf/tmpl/util.sgml
View File

@ -29,10 +29,11 @@ Utility and miscellaneous convenience functions.
@b:
@Returns:
<!--
Local variables:
mode: sgml
sgml-parent-document: ("../gdk-pixbuf.sgml" "book" "refsect2" "")
End:
-->

22
gdk-pixbuf/ChangeLog
View File

@ -1,3 +1,25 @@
1999-12-08 Federico Mena Quintero <federico@redhat.com>
* gdk-pixbuf/gdk-pixbuf-drawable.c: Fix includes.
(gdk_pixbuf_get_from_drawable): Implemented the zillion sanity
checks and API definition. The body needs filling in and it needs
to do the Right Thing(tm) for pixmaps plus the given colormap and
windows and their own colormaps.
* gdk-pixbuf/gdk-pixbuf.h: Added prototype for
gdk_pixbuf_get_from_drawable(). Killed gdk-pixbuf-drawable.h.
* gdk-pixbuf/Makefile.am: Re-added the gdk-pixbuf-drawable sources.
* doc/tmpl/from-drawables.sgml: Populated.
* doc/gdk-pixbuf.sgml: Added the from-drawables section.
* doc/Makefile.am (tmpl_sources): Added tmpl/from-drawables.sgml.
* doc/gdk-pixbuf-sections.txt: Added a section for getting pixbufs
from drawables.
1999-12-07 Federico Mena Quintero <federico@redhat.com>
* doc/tmpl/gnome-canvas-pixbuf.sgml: Added clarification about

10
gdk-pixbuf/Makefile.am
View File

@ -41,7 +41,6 @@ libexec_LTLIBRARIES = \
#noinst_PROGRAMS = testpixbuf testpixbuf-drawable
noinst_PROGRAMS = testpixbuf
DEPS = libgdk_pixbuf.la
INCLUDES = -I$(top_builddir)/gdk-pixbuf $(GLIB_CFLAGS) $(LIBART_CFLAGS) $(GTK_CFLAGS)
AM_CPPFLAGS = "-DPIXBUF_LIBDIR=\"$(libexecdir)\""
@ -50,11 +49,11 @@ LDADDS = libgdk_pixbuf.la $(LIBART_LIBS) $(GLIB_LIBS) $(GTK_LIBS)
if INSIDE_GNOME_LIBS
testpixbuf_LDADD = $(LDADDS) $(LIBART_LIBS) -lgmodule
#testpixbuf_drawable_LDADD = $(LDADDS)
else
testpixbuf_LDADD = $(LDADDS) $(LIBART_LIBS) $(GNOME_LIBS) -lgmodule
endif
#testpixbuf_drawable_LDADD = $(LDADDS) $(GNOME_LIBS)
endif
GDK_PIXBUF_LIBS = $(LIBART_LIBS) $(GLIB_LIBS) $(GTK_LIBS)
@ -74,14 +73,13 @@ libgdk_pixbufincludedir = $(includedir)/gdk-pixbuf
libgdk_pixbuf_la_SOURCES = \
gdk-pixbuf.c \
gdk-pixbuf-data.c \
gdk-pixbuf-drawable.c \
gdk-pixbuf-io.c \
gdk-pixbuf-loader.c \
gdk-pixbuf-render.c \
gdk-pixbuf-util.c \
$(CANVAS_SOURCEFILES)
# gdk-pixbuf-drawable.c \
libgdk_pixbuf_la_LDFLAGS = -version-info 1:0:0
libgdk_pixbufinclude_HEADERS = \
@ -89,8 +87,6 @@ libgdk_pixbufinclude_HEADERS = \
gdk-pixbuf-loader.h \
$(CANVAS_HEADERFILES)
# gdk-pixbuf-drawable.h \
noinst_HEADERS = \
gdk-pixbuf-io.h

10
gdk-pixbuf/gdk-pixbuf-drawable.h
View File

@ -1,10 +0,0 @@
#ifndef _GDK_PIXBUF_DRAWABLE_H_
#define _GDK_PIXBUF_DRAWABLE_H_
#include <gdk/gdk.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
GdkPixbuf *gdk_pixbuf_rgb_from_drawable (GdkWindow *window, gint x, gint y, gint width, gint height);
GdkPixbuf *gdk_pixbuf_rgba_from_drawable (GdkWindow *window, gint x, gint y, gint width, gint height);
#endif /* _GDK_PIXBUF_DRAWABLE_H_ */

13
gdk-pixbuf/gdk-pixbuf.h
View File

@ -118,6 +118,19 @@ void gdk_pixbuf_render_to_drawable_alpha (GdkPixbuf *pixbuf, GdkDrawable *drawab
GdkRgbDither dither,
int x_dither, int y_dither);
#if 0
/* Fetching a region from a drawable */
GdkPixbuf *gdk_pixbuf_get_from_drawable (GdkPixbuf *dest,
GdkDrawable *src, GdkColormap *cmap,
int src_x, int src_y,
int dest_x, int dest_y,
int width, int height);
#endif
#ifdef __cplusplus

406
gdk/gdkpixbuf-drawable.c
View File

@ -1,28 +1,38 @@
/*
* Creates an GdkPixbuf from a Drawable
/* GdkPixbuf library - convert X drawable information to RGB
*
* Authors:
* Cody Russell <bratsche@dfw.net>
* Michael Zucchi <zucchi@zedzone.mmc.com.au>
* Copyright (C) 1999 Michael Zucchi
*
* This is licensed software, see the file COPYING for
* details.
* Authors: Michael Zucchi <zucchi@zedzone.mmc.com.au>
* Cody Russell <bratsche@dfw.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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.
*/
#include <config.h>
#include <stdio.h>
#include <string.h>
#include <glib.h>
#include <gmodule.h>
#include "gdk-pixbuf.h"
#include "gdk-pixbuf-drawable.h"
#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
#define LITTLE
#endif
#define d(x)
static unsigned long mask_table[] = {
0x00000000, 0x00000001, 0x00000003, 0x00000007,
0x0000000f, 0x0000001f, 0x0000003f, 0x0000007f,
@ -35,11 +45,14 @@ static unsigned long mask_table[] = {
0xffffffff
};
/*
convert 1 bits-pixel data
no alpha
*/
static void rgb1(GdkImage *image, art_u8 *pixels, int rowstride)
static void
rgb1 (GdkImage *image, art_u8 *pixels, int rowstride)
{
int xx, yy;
int width, height;
@ -66,7 +79,7 @@ static void rgb1(GdkImage *image, art_u8 *pixels, int rowstride)
o = orow;
for (xx = 0; xx < width; xx ++) {
data = srow[xx>>3] >> (7 - (xx & 7)) & 1;
data = srow[xx >> 3] >> (7 - (xx & 7)) & 1;
*o++ = colormap->colors[data].red;
*o++ = colormap->colors[data].green;
*o++ = colormap->colors[data].blue;
@ -80,7 +93,8 @@ static void rgb1(GdkImage *image, art_u8 *pixels, int rowstride)
convert 1 bits/pixel data
with alpha
*/
static void rgb1a(GdkImage *image, art_u8 *pixels, int rowstride)
static void
rgb1a (GdkImage *image, art_u8 *pixels, int rowstride)
{
int xx, yy;
int width, height;
@ -103,17 +117,17 @@ static void rgb1a(GdkImage *image, art_u8 *pixels, int rowstride)
colormap = gdk_rgb_get_cmap ();
for (xx=0;xx<2;xx++) {
for (xx = 0; xx < 2; xx++) {
#ifdef LITTLE
remap[xx] = 0xff000000
| colormap->colors[xx].blue<<16
| colormap->colors[xx].green<<8
| colormap->colors[xx].blue << 16
| colormap->colors[xx].green << 8
| colormap->colors[xx].red;
#else
remap[xx] = 0xff
| colormap->colors[xx].red<<24
| colormap->colors[xx].green<<16
| colormap->colors[xx].red<<8;
| colormap->colors[xx].red << 24
| colormap->colors[xx].green << 16
| colormap->colors[xx].red << 8;
#endif
}
@ -122,7 +136,7 @@ static void rgb1a(GdkImage *image, art_u8 *pixels, int rowstride)
o = orow;
for (xx = 0; xx < width; xx ++) {
data = srow[xx>>3] >> (7 - (xx & 7)) & 1;
data = srow[xx >> 3] >> (7 - (xx & 7)) & 1;
*o++ = remap[data];
}
srow += bpl;
@ -134,7 +148,8 @@ static void rgb1a(GdkImage *image, art_u8 *pixels, int rowstride)
convert 8 bits/pixel data
no alpha
*/
static void rgb8(GdkImage *image, art_u8 *pixels, int rowstride)
static void
rgb8 (GdkImage *image, art_u8 *pixels, int rowstride)
{
int xx, yy;
int width, height;
@ -150,12 +165,12 @@ static void rgb8(GdkImage *image, art_u8 *pixels, int rowstride)
height = image->height;
bpl = image->bpl;
d(printf("8 bit, no alpha output\n"));
d (printf ("8 bit, no alpha output\n"));
colormap = gdk_rgb_get_cmap ();
mask = mask_table[image->depth];
for (yy = 0;yy < height; yy++) {
for (yy = 0; yy < height; yy++) {
s = srow;
o = orow;
for (xx = 0; xx < width; xx++) {
@ -173,7 +188,8 @@ static void rgb8(GdkImage *image, art_u8 *pixels, int rowstride)
convert 8 bits/pixel data
with alpha
*/
static void rgb8a(GdkImage *image, art_u8 *pixels, int rowstride)
static void
rgb8a (GdkImage *image, art_u8 *pixels, int rowstride)
{
int xx, yy;
int width, height;
@ -190,28 +206,28 @@ static void rgb8a(GdkImage *image, art_u8 *pixels, int rowstride)
height = image->height;
bpl = image->bpl;
d(printf("8 bit, with alpha output\n"));
d (printf ("8 bit, with alpha output\n"));
colormap = gdk_rgb_get_cmap ();
mask = mask_table[image->depth];
for (xx=0;xx<colormap->size;xx++) {
for (xx = 0; xx < colormap->size; xx++) {
#ifdef LITTLE
remap[xx] = 0xff000000
| colormap->colors[xx].blue<<16
| colormap->colors[xx].green<<8
| colormap->colors[xx].blue << 16
| colormap->colors[xx].green << 8
| colormap->colors[xx].red;
#else
remap[xx] = 0xff
| colormap->colors[xx].red<<24
| colormap->colors[xx].green<<16
| colormap->colors[xx].red<<8;
| colormap->colors[xx].red << 24
| colormap->colors[xx].green << 16
| colormap->colors[xx].red << 8;
#endif
}
for (yy = 0;yy < height; yy++) {
for (yy = 0; yy < height; yy++) {
s = srow;
o = (unsigned long *)orow;
o = (unsigned long *) orow;
for (xx = 0; xx < width; xx ++) {
data = *s++ & mask;
*o++ = remap[data];
@ -226,7 +242,8 @@ static void rgb8a(GdkImage *image, art_u8 *pixels, int rowstride)
no alpha
data in lsb format
*/
static void rgb565lsb(GdkImage *image, art_u8 *pixels, int rowstride)
static void
rgb565lsb (GdkImage *image, art_u8 *pixels, int rowstride)
{
int xx, yy;
int width, height;
@ -244,13 +261,13 @@ static void rgb565lsb(GdkImage *image, art_u8 *pixels, int rowstride)
height = image->height;
bpl = image->bpl;
for (yy = 0;yy < height; yy++) {
for (yy = 0; yy < height; yy++) {
#ifdef LITTLE
s = (unsigned long *)srow;
s = (unsigned long *) srow;
#else
s = (unsigned char *)srow;
s = (unsigned char *) srow;
#endif
o = (unsigned short *)orow;
o = (unsigned short *) orow;
for (xx = 1; xx < width; xx += 2) {
register unsigned long data;
#ifdef LITTLE
@ -260,8 +277,8 @@ static void rgb565lsb(GdkImage *image, art_u8 *pixels, int rowstride)
*o++ = ((data & 0x7e00000) >> 19) | (data & 0x1f0000) >> 5;
#else
/* swap endianness first */
data = s[0] | s[1]<<8 | s[2]<<16 | s[3]<<24;
s+=4;
data = s[0] | s[1] << 8 | s[2] << 16 | s[3] << 24;
s += 4;
*o++ = (data & 0xf800) | (data & 0x7e0) >> 3;
*o++ = (data & 0x1f) << 11 | (data & 0xf8000000) >> 24;
*o++ = ((data & 0x7e00000) >> 11) | (data & 0x1f0000) >> 13;
@ -290,7 +307,8 @@ static void rgb565lsb(GdkImage *image, art_u8 *pixels, int rowstride)
no alpha
data in msb format
*/
static void rgb565msb(GdkImage *image, art_u8 *pixels, int rowstride)
static void
rgb565msb (GdkImage *image, art_u8 *pixels, int rowstride)
{
int xx, yy;
int width, height;
@ -308,19 +326,19 @@ static void rgb565msb(GdkImage *image, art_u8 *pixels, int rowstride)
height = image->height;
bpl = image->bpl;
for (yy = 0;yy < height; yy++) {
for (yy = 0; yy < height; yy++) {
#ifdef LITTLE
s = srow;
#else
s = (unsigned long *)srow;
s = (unsigned long *) srow;
#endif
o = (unsigned short *)orow;
o = (unsigned short *) orow;
for (xx = 1; xx < width; xx += 2) {
register unsigned long data;
#ifdef LITTLE
/* swap endianness first */
data = s[0] | s[1]<<8 | s[2]<<16 | s[3]<<24;
s+=4;
data = s[0] | s[1] << 8 | s[2] << 16 | s[3] << 24;
s += 4;
*o++ = (data & 0xf800) >> 8 | (data & 0x7e0) << 5;
*o++ = (data & 0x1f) << 3 | (data & 0xf8000000) >> 16;
*o++ = ((data & 0x7e00000) >> 19) | (data & 0x1f0000) >> 5;
@ -354,7 +372,8 @@ static void rgb565msb(GdkImage *image, art_u8 *pixels, int rowstride)
with alpha
data in lsb format
*/
static void rgb565alsb(GdkImage *image, art_u8 *pixels, int rowstride)
static void
rgb565alsb (GdkImage *image, art_u8 *pixels, int rowstride)
{
int xx, yy;
int width, height;
@ -373,25 +392,25 @@ static void rgb565alsb(GdkImage *image, art_u8 *pixels, int rowstride)
height = image->height;
bpl = image->bpl;
for (yy = 0;yy < height; yy++) {
for (yy = 0; yy < height; yy++) {
#ifdef LITTLE
s = (unsigned short *)srow;
s = (unsigned short *) srow;
#else
s = (unsigned char *)srow;
s = (unsigned char *) srow;
#endif
o = (unsigned long *)orow;
o = (unsigned long *) orow;
for (xx = 0; xx < width; xx ++) {
register unsigned long data;
/* rrrrrggg gggbbbbb -> rrrrr000 gggggg00 bbbbb000 aaaaaaaa */
/* little endian: aaaaaaaa bbbbb000 gggggg00 rrrrr000 */
#ifdef LITTLE
data = *s++;
*o++ = (data & 0xf800) >>8 | (data & 0x7e0) << 5
*o++ = (data & 0xf800) >> 8 | (data & 0x7e0) << 5
| (data & 0x1f) << 19 | 0xff000000;
#else
/* swap endianness first */
data = s[0] | s[1]<<8;
s+=2;
data = s[0] | s[1] << 8;
s += 2;
*o++ = (data & 0xf800) << 16 | (data & 0x7e0) << 13
| (data & 0x1f) << 11 | 0xff;
#endif
@ -406,7 +425,8 @@ static void rgb565alsb(GdkImage *image, art_u8 *pixels, int rowstride)
with alpha
data in msb format
*/
static void rgb565amsb(GdkImage *image, art_u8 *pixels, int rowstride)
static void
rgb565amsb (GdkImage *image, art_u8 *pixels, int rowstride)
{
int xx, yy;
int width, height;
@ -425,18 +445,18 @@ static void rgb565amsb(GdkImage *image, art_u8 *pixels, int rowstride)
height = image->height;
bpl = image->bpl;
for (yy = 0;yy < height; yy++) {
for (yy = 0; yy < height; yy++) {
s = srow;
o = (unsigned long *)orow;
o = (unsigned long *) orow;
for (xx = 0; xx < width; xx ++) {
register unsigned long data;
/* rrrrrggg gggbbbbb -> rrrrr000 gggggg00 bbbbb000 aaaaaaaa */
/* little endian: aaaaaaaa bbbbb000 gggggg00 rrrrr000 */
#ifdef LITTLE
/* swap endianness first */
data = s[0] | s[1]<<8;
s+=2;
*o++ = (data & 0xf800) >>8 | (data & 0x7e0) << 5
data = s[0] | s[1] << 8;
s += 2;
*o++ = (data & 0xf800) >> 8 | (data & 0x7e0) << 5
| (data & 0x1f) << 19 | 0xff000000;
#else
data = *s++;
@ -454,7 +474,8 @@ static void rgb565amsb(GdkImage *image, art_u8 *pixels, int rowstride)
no alpha
data in lsb format
*/
static void rgb555lsb(GdkImage *image, art_u8 *pixels, int rowstride)
static void
rgb555lsb (GdkImage *image, art_u8 *pixels, int rowstride)
{
int xx, yy;
int width, height;
@ -472,13 +493,13 @@ static void rgb555lsb(GdkImage *image, art_u8 *pixels, int rowstride)
height = image->height;
bpl = image->bpl;
for (yy = 0;yy < height; yy++) {
for (yy = 0; yy < height; yy++) {
#ifdef LITTLE
s = (unsigned long *)srow;
s = (unsigned long *) srow;
#else
s = srow;
#endif
o = (unsigned short *)orow;
o = (unsigned short *) orow;
for (xx = 1; xx < width; xx += 2) {
register unsigned long data;
#ifdef LITTLE
@ -488,8 +509,8 @@ static void rgb555lsb(GdkImage *image, art_u8 *pixels, int rowstride)
*o++ = ((data & 0x3e00000) >> 18) | (data & 0x1f0000) >> 5;
#else
/* swap endianness first */
data = s[0] | s[1]<<8 | s[2]<<16 | s[3]<<24;
s+=4;
data = s[0] | s[1] << 8 | s[2] << 16 | s[3] << 24;
s += 4;
*o++ = (data & 0x7c00) << 1 | (data & 0x3e0) >> 2;
*o++ = (data & 0x1f) << 11 | (data & 0x7c000000) >> 23;
*o++ = ((data & 0x3e00000) >> 10) | (data & 0x1f0000) >> 13;
@ -518,7 +539,8 @@ static void rgb555lsb(GdkImage *image, art_u8 *pixels, int rowstride)
no alpha
data in msb format
*/
static void rgb555msb(GdkImage *image, art_u8 *pixels, int rowstride)
static void
rgb555msb (GdkImage *image, art_u8 *pixels, int rowstride)
{
int xx, yy;
int width, height;
@ -536,15 +558,15 @@ static void rgb555msb(GdkImage *image, art_u8 *pixels, int rowstride)
height = image->height;
bpl = image->bpl;
for (yy = 0;yy < height; yy++) {
for (yy = 0; yy < height; yy++) {
s = srow;
o = (unsigned short *)orow;
o = (unsigned short *) orow;
for (xx = 1; xx < width; xx += 2) {
register unsigned long data;
#ifdef LITTLE
/* swap endianness first */
data = s[0] | s[1]<<8 | s[2]<<16 | s[3]<<24;
s+=4;
data = s[0] | s[1] << 8 | s[2] << 16 | s[3] << 24;
s += 4;
*o++ = (data & 0x7c00) >> 7 | (data & 0x3e0) << 6;
*o++ = (data & 0x1f) << 3 | (data & 0x7c000000) >> 15;
*o++ = ((data & 0x3e00000) >> 18) | (data & 0x1f0000) >> 5;
@ -578,7 +600,8 @@ static void rgb555msb(GdkImage *image, art_u8 *pixels, int rowstride)
with alpha
data in lsb format
*/
static void rgb555alsb(GdkImage *image, art_u8 *pixels, int rowstride)
static void
rgb555alsb (GdkImage *image, art_u8 *pixels, int rowstride)
{
int xx, yy;
int width, height;
@ -597,25 +620,25 @@ static void rgb555alsb(GdkImage *image, art_u8 *pixels, int rowstride)
height = image->height;
bpl = image->bpl;
for (yy = 0;yy < height; yy++) {
for (yy = 0; yy < height; yy++) {
#ifdef LITTLE
s = (unsigned short *)srow;
s = (unsigned short *) srow;
#else
s = srow;
#endif
o = (unsigned long *)orow;
o = (unsigned long *) orow;
for (xx = 0; xx < width; xx++) {
register unsigned long data;
/* rrrrrggg gggbbbbb -> rrrrr000 gggggg00 bbbbb000 aaaaaaaa */
/* little endian: aaaaaaaa bbbbb000 gggggg00 rrrrr000 */
#ifdef LITTLE
data = *s++;
*o++ = (data & 0x7c00) >>7 | (data & 0x3e0) << 6
*o++ = (data & 0x7c00) >> 7 | (data & 0x3e0) << 6
| (data & 0x1f) << 19 | 0xff000000;
#else
/* swap endianness first */
data = s[0] | s[1]<<8;
s+=2;
data = s[0] | s[1] << 8;
s += 2;
*o++ = (data & 0x7c00) << 17 | (data & 0x3e0) << 14
| (data & 0x1f) << 11 | 0xff;
#endif
@ -630,7 +653,8 @@ static void rgb555alsb(GdkImage *image, art_u8 *pixels, int rowstride)
with alpha
data in msb format
*/
static void rgb555amsb(GdkImage *image, art_u8 *pixels, int rowstride)
static void
rgb555amsb (GdkImage *image, art_u8 *pixels, int rowstride)
{
int xx, yy;
int width, height;
@ -649,21 +673,21 @@ static void rgb555amsb(GdkImage *image, art_u8 *pixels, int rowstride)
height = image->height;
bpl = image->bpl;
for (yy = 0;yy < height; yy++) {
for (yy = 0; yy < height; yy++) {
#ifdef LITTLE
s = (unsigned short *)srow;
s = (unsigned short *) srow;
#else
s = srow;
#endif
o = (unsigned long *)orow;
o = (unsigned long *) orow;
for (xx = 0; xx < width; xx++) {
register unsigned long data;
/* rrrrrggg gggbbbbb -> rrrrr000 gggggg00 bbbbb000 aaaaaaaa */
/* little endian: aaaaaaaa bbbbb000 gggggg00 rrrrr000 */
#ifdef LITTLE
/* swap endianness first */
data = s[0] | s[1]<<8;
s+=2;
data = s[0] | s[1] << 8;
s += 2;
*o++ = (data & 0x7c00) >>7 | (data & 0x3e0) << 6
| (data & 0x1f) << 19 | 0xff000000;
#else
@ -678,7 +702,8 @@ static void rgb555amsb(GdkImage *image, art_u8 *pixels, int rowstride)
}
static void rgb888alsb(GdkImage *image, art_u8 *pixels, int rowstride)
static void
rgb888alsb (GdkImage *image, art_u8 *pixels, int rowstride)
{
int xx, yy;
int width, height;
@ -692,7 +717,7 @@ static void rgb888alsb(GdkImage *image, art_u8 *pixels, int rowstride)
height = image->height;
bpl = image->bpl;
d(printf ("32 bits/pixel with alpha\n"));
d (printf ("32 bits/pixel with alpha\n"));
/* lsb data */
for (yy = 0; yy < height; yy++) {
@ -710,7 +735,8 @@ static void rgb888alsb(GdkImage *image, art_u8 *pixels, int rowstride)
}
}
static void rgb888lsb(GdkImage *image, art_u8 *pixels, int rowstride)
static void
rgb888lsb (GdkImage *image, art_u8 *pixels, int rowstride)
{
int xx, yy;
int width, height;
@ -723,7 +749,7 @@ static void rgb888lsb(GdkImage *image, art_u8 *pixels, int rowstride)
height = image->height;
bpl = image->bpl;
d(printf("32 bit, lsb, no alpha\n"));
d (printf ("32 bit, lsb, no alpha\n"));
for (yy = 0; yy < height; yy++) {
s = srow;
@ -739,7 +765,8 @@ static void rgb888lsb(GdkImage *image, art_u8 *pixels, int rowstride)
}
}
static void rgb888amsb(GdkImage *image, art_u8 *pixels, int rowstride)
static void
rgb888amsb (GdkImage *image, art_u8 *pixels, int rowstride)
{
int xx, yy;
int width, height;
@ -754,7 +781,7 @@ static void rgb888amsb(GdkImage *image, art_u8 *pixels, int rowstride)
unsigned char *o;
#endif
d(printf("32 bit, msb, with alpha\n"));
d (printf ("32 bit, msb, with alpha\n"));
width = image->width;
height = image->height;
@ -763,8 +790,8 @@ static void rgb888amsb(GdkImage *image, art_u8 *pixels, int rowstride)
/* msb data */
for (yy = 0; yy < height; yy++) {
#ifdef LITTLE
s = (unsigned long *)srow;
o = (unsigned long *)orow;
s = (unsigned long *) srow;
o = (unsigned long *) orow;
#else
s = srow;
o = orow;
@ -777,7 +804,7 @@ static void rgb888amsb(GdkImage *image, art_u8 *pixels, int rowstride)
*o++ = 0xff;
s += 4;
#else
*o++ = (*s <<8 ) | 0xff; /* untested */
*o++ = (*s << 8) | 0xff; /* untested */
s++;
#endif
}
@ -786,7 +813,8 @@ static void rgb888amsb(GdkImage *image, art_u8 *pixels, int rowstride)
}
}
static void rgb888msb(GdkImage *image, art_u8 *pixels, int rowstride)
static void
rgb888msb (GdkImage *image, art_u8 *pixels, int rowstride)
{
int xx, yy;
int width, height;
@ -796,7 +824,7 @@ static void rgb888msb(GdkImage *image, art_u8 *pixels, int rowstride)
unsigned char *s;
unsigned char *o;
d(printf("32 bit, msb, no alpha\n"));
d (printf ("32 bit, msb, no alpha\n"));
width = image->width;
height = image->height;
@ -816,7 +844,7 @@ static void rgb888msb(GdkImage *image, art_u8 *pixels, int rowstride)
}
}
typedef void (*cfunc) (GdkImage *image, art_u8 *pixels, int rowstride);
typedef void (* cfunc) (GdkImage *image, art_u8 *pixels, int rowstride);
static cfunc convert_map[] = {
rgb1,rgb1,rgb1a,rgb1a,
@ -829,22 +857,37 @@ static cfunc convert_map[] = {
/*
perform actual conversion
*/
static void rgbconvert(GdkImage *image, art_u8 *pixels, int rowstride, int alpha)
static void
rgbconvert (GdkImage *image, art_u8 *pixels, int rowstride, int alpha)
{
int index = (image->byte_order == GDK_MSB_FIRST)
| (alpha!=0) << 1;
int index = (image->byte_order == GDK_MSB_FIRST) | (alpha != 0) << 1;
int bank=0;
switch (image->depth) {
case 1: bank = 0; break;
case 8: bank = 1; break;
case 15: bank = 2; break;
case 16: bank = 3; break;
case 1:
bank = 0;
break;
case 8:
bank = 1;
break;
case 15:
bank = 2;
break;
case 16:
bank = 3;
break;
case 24:
case 32: bank = 4; break;
case 32:
bank = 4;
break;
}
index |= bank<<2;
convert_map[index](image, pixels, rowstride);
index |= bank << 2;
(* convert_map[index]) (image, pixels, rowstride);
}
static GdkPixbuf *
@ -881,7 +924,7 @@ gdk_pixbuf_from_drawable_core (GdkPixmap * window, gint x, gint y, gint width,
bpl = image->bpl;
rgbconvert(image, pixels, rowstride, with_alpha);
rgbconvert (image, pixels, rowstride, with_alpha);
gdk_image_destroy (image);
if (with_alpha)
@ -892,24 +935,139 @@ gdk_pixbuf_from_drawable_core (GdkPixmap * window, gint x, gint y, gint width,
return gdk_pixbuf_new_from_art_pixbuf (art_pixbuf);
}
/* Public functions */
/* Exported functions */
/**
* gdk_pixbuf_get_from_drawable:
* @dest: Destination pixbuf, or NULL if a new pixbuf should be created.
* @src: Source drawable.
* @cmap: A colormap if @src is a pixmap. If it is a window, this argument will
* be ignored.
* @src_x: Source X coordinate within drawable.
* @src_y: Source Y coordinate within drawable.
* @dest_x: Destination X coordinate in pixbuf, or 0 if @dest is NULL.
* @dest_y: Destination Y coordinate in pixbuf, or 0 if @dest is NULL.
* @width: Width in pixels of region to get.
* @height: Height in pixels of region to get.
*
* Transfers image data from a Gdk drawable and converts it to an RGB(A)
* representation inside a GdkPixbuf.
*
* If the drawable @src is a pixmap, then a suitable colormap must be specified,
* since pixmaps are just blocks of pixel data without an associated colormap.
* If the drawable is a window, the @cmap argument will be ignored and the
* window's own colormap will be used instead.
*
* If the specified destination pixbuf @dest is #NULL, then this function will
* create an RGB pixbuf with 8 bits per channel and no alpha, with the same size
* specified by the @width and @height arguments. In this case, the @dest_x and
* @dest_y arguments must be specified as 0, otherwise the function will return
* #NULL. If the specified destination pixbuf is not NULL and it contains alpha
* information, then the filled pixels will be set to full opacity.
*
* If the specified drawable is a pixmap, then the requested source rectangle
* must be completely contained within the pixmap, otherwise the function will
* return #NULL.
*
* If the specified drawable is a window, then it must be viewable, i.e. all of
* its ancestors up to the root window must be mapped. Also, the specified
* source rectangle must be completely contained within the window and within
* the screen. If regions of the window are obscured by noninferior windows, the
* contents of those regions are undefined. The contents of regions obscured by
* inferior windows of a different depth than that of the source window will also
* be undefined.
*
* Return value: The same pixbuf as @dest if it was non-NULL, or a newly-created
* pixbuf with a reference count of 1 if no destination pixbuf was specified.
**/
GdkPixbuf *
gdk_pixbuf_rgb_from_drawable (GdkWindow * window, gint x, gint y, gint width,
gint height)
gdk_pixbuf_get_from_drawable (GdkPixbuf *dest,
GdkDrawable *src, GdkColormap *cmap,
int src_x, int src_y,
int dest_x, int dest_y,
int width, int height)
{
return gdk_pixbuf_from_drawable_core (window, x, y, width, height, 0);
}
GdkWindowType window_type;
gint src_width, src_height;
ArtPixBuf *apb;
GdkPixbuf *
gdk_pixbuf_rgba_from_drawable (GdkWindow * window, gint x, gint y, gint width,
gint height)
{
return gdk_pixbuf_from_drawable_core (window, x, y, width, height, 1);
}
/* General sanity checks */
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
g_return_val_if_fail (src != NULL, NULL);
window_type = gdk_window_get_type (src);
if (window_type == GDK_WINDOW_PIXMAP)
g_return_val_if_fail (cmap != NULL, NULL);
else
/* FIXME: this is not perfect, since is_viewable() only tests
* recursively up the Gdk parent window tree, but stops at
* foreign windows or Gdk toplevels. I.e. if a window manager
* unmapped one of its own windows, this won't work.
*/
g_return_val_if_fail (gdk_window_is_viewable (src), NULL);
if (!dest)
g_return_val_if_fail (dest_x == 0 && dest_y == 0, NULL);
else {
apb = dest->art_pixbuf;
g_return_val_if_fail (apb->format == ART_PIX_RGB, NULL);
g_return_val_if_fail (apb->n_channels == 3 || apb->n_channels == 4, NULL);
g_return_val_if_fail (apb->bits_per_sample == 8, NULL);
}
/* Coordinate sanity checks */
gdk_window_get_size (src, &src_width, &src_height);
g_return_val_if_fail (src_x >= 0 && src_y >= 0, NULL);
g_return_val_if_fail (src_x + width <= src_width && src_y + height <= src_height, NULL);
if (dest) {
g_return_val_if_fail (dest_x >= 0 && dest_y >= 0, NULL);
g_return_val_if_fail (dest_x + width <= apb->width, NULL);
g_return_val_if_fail (dest_y + height <= apb->height, NULL);
}
if (window_type != GDK_WINDOW_PIXMAP) {
int ret;
gint src_xorigin, src_yorigin;
int screen_width, screen_height;
int screen_srcx, screen_srcy;
ret = gdk_window_get_origin (src, &src_xorigin, &src_yorigin);
g_return_val_if_fail (ret != FALSE, NULL);
screen_width = gdk_screen_width ();
screen_height = gdk_screen_height ();
screen_srcx = src_xorigin + src_x;
screen_srcy = src_yorigin + src_y;
g_return_val_if_fail (screen_srcx >= 0 && screen_srcy >= 0, NULL);
g_return_val_if_fail (screen_srcx + width <= screen_width, NULL);
g_return_val_if_fail (screen_srcy + height <= screen_height, NULL);
}
/* Create the pixbuf if needed */
if (!dest) {
dest = gdk_pixbuf_new (ART_PIX_RGB, FALSE, 8, width, height);
if (!dest)
return NULL;
apb = dest->art_pixbuf;
}
/* Get the colormap if needed */
if (window_type != GDK_WINDOW_PIXMAP)
cmap = gdk_window_get_colormap (src);
/* FIXME: fill in the body here */
return dest;
}