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1339 lines
32 KiB
C
1339 lines
32 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
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/* GdkPixbuf library - convert X drawable information to RGB
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*
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* Copyright (C) 1999 Michael Zucchi
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*
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* Authors: Michael Zucchi <zucchi@zedzone.mmc.com.au>
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* Cody Russell <bratsche@dfw.net>
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* Federico Mena-Quintero <federico@gimp.org>
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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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/* Ported to Xlib by John Harper <john@dcs.warwick.ac.uk> */
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#include "config.h"
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#include <stdio.h>
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#include <string.h>
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#include <gdk-pixbuf/gdk-pixbuf-private.h>
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#include "gdk-pixbuf-xlib-private.h"
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
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#define LITTLE
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#endif
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#define d(x)
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static const guint32 mask_table[] = {
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0x00000000, 0x00000001, 0x00000003, 0x00000007,
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0x0000000f, 0x0000001f, 0x0000003f, 0x0000007f,
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0x000000ff, 0x000001ff, 0x000003ff, 0x000007ff,
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0x00000fff, 0x00001fff, 0x00003fff, 0x00007fff,
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0x0000ffff, 0x0001ffff, 0x0003ffff, 0x0007ffff,
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0x000fffff, 0x001fffff, 0x003fffff, 0x007fffff,
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0x00ffffff, 0x01ffffff, 0x03ffffff, 0x07ffffff,
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0x0fffffff, 0x1fffffff, 0x3fffffff, 0x7fffffff,
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0xffffffff
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};
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/* color handling */
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typedef struct xlib_colormap_struct xlib_colormap;
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struct xlib_colormap_struct {
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int size;
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XColor *colors;
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Visual *visual;
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Colormap colormap;
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};
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static xlib_colormap *
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xlib_get_colormap (Colormap id, Visual *visual)
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{
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int i;
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xlib_colormap *xc = g_new (xlib_colormap, 1);
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xc->size = visual->map_entries;
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xc->colors = g_new (XColor, xc->size);
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xc->visual = visual;
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xc->colormap = id;
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for (i = 0; i < xc->size; i++) {
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xc->colors[i].pixel = i;
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xc->colors[i].flags = DoRed | DoGreen | DoBlue;
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}
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XQueryColors (gdk_pixbuf_dpy, xc->colormap, xc->colors, xc->size);
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return xc;
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}
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static void
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xlib_colormap_free (xlib_colormap *xc)
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{
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g_free (xc->colors);
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g_free (xc);
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}
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/* from gdkvisual.c */
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static void
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visual_decompose_mask (gulong mask,
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gint *shift,
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gint *prec)
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{
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*shift = 0;
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*prec = 0;
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while (!(mask & 0x1)) {
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(*shift)++;
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mask >>= 1;
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}
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while (mask & 0x1) {
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(*prec)++;
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mask >>= 1;
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}
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}
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static gboolean x_error;
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static int
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handle_x_error (Display *dpy, XErrorEvent *ev)
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{
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x_error = TRUE;
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return 0;
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}
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static gboolean
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drawable_is_pixmap (Drawable d)
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{
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/* copied from Imlib */
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XErrorHandler errh;
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XWindowAttributes wa;
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gboolean is_pixmap;
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errh = XSetErrorHandler (handle_x_error);
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x_error = FALSE;
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XGetWindowAttributes (gdk_pixbuf_dpy, d, &wa);
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XSync (gdk_pixbuf_dpy, False);
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is_pixmap = x_error;
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XSetErrorHandler (errh);
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return is_pixmap;
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}
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/*
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convert 1 bits-pixel data
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no alpha
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*/
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static void
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rgb1 (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
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{
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int xx, yy;
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int width, height;
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int bpl;
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register guint8 data;
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guint8 *o;
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guint8 *srow = (guint8 *)image->data, *orow = pixels;
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d (printf ("1 bits/pixel\n"));
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/* convert upto 8 pixels/time */
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/* its probably not worth trying to make this run very fast, who uses
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1 bit displays anymore? */
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width = image->width;
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height = image->height;
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bpl = image->bytes_per_line;
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for (yy = 0; yy < height; yy++) {
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o = orow;
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for (xx = 0; xx < width; xx ++) {
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data = srow[xx >> 3] >> (7 - (xx & 7)) & 1;
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*o++ = colormap->colors[data].red;
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*o++ = colormap->colors[data].green;
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*o++ = colormap->colors[data].blue;
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}
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srow += bpl;
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orow += rowstride;
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}
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}
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/*
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convert 1 bits/pixel data
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with alpha
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*/
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static void
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rgb1a (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
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{
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int xx, yy;
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int width, height;
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int bpl;
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register guint8 data;
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guint8 *o;
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guint8 *srow = (guint8 *)image->data, *orow = pixels;
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guint32 remap[2];
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d (printf ("1 bits/pixel\n"));
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/* convert upto 8 pixels/time */
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/* its probably not worth trying to make this run very fast, who uses
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1 bit displays anymore? */
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width = image->width;
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height = image->height;
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bpl = image->bytes_per_line;
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for (xx = 0; xx < 2; xx++) {
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#ifdef LITTLE
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remap[xx] = 0xff000000
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| colormap->colors[xx].blue << 16
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| colormap->colors[xx].green << 8
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| colormap->colors[xx].red;
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#else
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remap[xx] = 0xff
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| colormap->colors[xx].red << 24
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| colormap->colors[xx].green << 16
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| colormap->colors[xx].blue << 8;
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#endif
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}
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for (yy = 0; yy < height; yy++) {
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o = orow;
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for (xx = 0; xx < width; xx ++) {
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data = srow[xx >> 3] >> (7 - (xx & 7)) & 1;
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*o++ = remap[data];
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}
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srow += bpl;
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orow += rowstride;
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}
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}
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/*
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convert 8 bits/pixel data
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no alpha
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*/
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static void
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rgb8 (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
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{
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int xx, yy;
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int width, height;
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int bpl;
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guint32 mask;
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register guint32 data;
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guint8 *srow = (guint8 *)image->data, *orow = pixels;
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register guint8 *s;
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register guint8 *o;
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width = image->width;
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height = image->height;
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bpl = image->bytes_per_line;
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d (printf ("8 bit, no alpha output\n"));
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mask = mask_table[image->depth];
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for (yy = 0; yy < height; yy++) {
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s = srow;
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o = orow;
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for (xx = 0; xx < width; xx++) {
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data = *s++ & mask;
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*o++ = colormap->colors[data].red;
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*o++ = colormap->colors[data].green;
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*o++ = colormap->colors[data].blue;
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}
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srow += bpl;
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orow += rowstride;
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}
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}
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/*
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convert 8 bits/pixel data
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with alpha
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*/
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static void
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rgb8a (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
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{
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int xx, yy;
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int width, height;
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int bpl;
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guint32 mask;
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register guint32 data;
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guint32 remap[256];
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register guint8 *s; /* read 2 pixels at once */
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register guint32 *o;
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guint8 *srow = (guint8 *)image->data, *orow = pixels;
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width = image->width;
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height = image->height;
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bpl = image->bytes_per_line;
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d (printf ("8 bit, with alpha output\n"));
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mask = mask_table[image->depth];
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for (xx = 0; xx < colormap->size; xx++) {
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#ifdef LITTLE
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remap[xx] = 0xff000000
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| colormap->colors[xx].blue << 16
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| colormap->colors[xx].green << 8
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| colormap->colors[xx].red;
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#else
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remap[xx] = 0xff
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| colormap->colors[xx].red << 24
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| colormap->colors[xx].green << 16
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| colormap->colors[xx].blue << 8;
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#endif
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}
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for (yy = 0; yy < height; yy++) {
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s = srow;
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o = (guint32 *) orow;
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for (xx = 0; xx < width; xx ++) {
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data = *s++ & mask;
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*o++ = remap[data];
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}
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srow += bpl;
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orow += rowstride;
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}
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}
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/*
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convert 16 bits/pixel data
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no alpha
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data in lsb format
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*/
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static void
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rgb565lsb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
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{
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int xx, yy;
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int width, height;
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int bpl;
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#ifdef LITTLE
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register guint32 *s; /* read 2 pixels at once */
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#else
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register guint8 *s; /* read 2 pixels at once */
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#endif
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register guint16 *o;
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guint8 *srow = (guint8 *)image->data, *orow = pixels;
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width = image->width;
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height = image->height;
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bpl = image->bytes_per_line;
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for (yy = 0; yy < height; yy++) {
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#ifdef LITTLE
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s = (guint32 *) srow;
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#else
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s = srow;
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#endif
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o = (guint16 *) orow;
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for (xx = 1; xx < width; xx += 2) {
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register guint32 data;
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#ifdef LITTLE
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data = *s++;
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*o++ = (data & 0xf800) >> 8 | (data & 0xe000) >> 13
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| (data & 0x7e0) << 5 | (data & 0x600) >> 1;
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*o++ = (data & 0x1f) << 3 | (data & 0x1c) >> 2
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| (data & 0xf8000000) >> 16 | (data & 0xe0000000) >> 21;
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*o++ = (data & 0x7e00000) >> 19 | (data & 0x6000000) >> 25
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| (data & 0x1f0000) >> 5 | (data & 0x1c0000) >> 10;
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#else
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/* swap endianness first */
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data = s[1] | s[0] << 8 | s[3] << 16 | s[2] << 24;
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s += 4;
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*o++ = (data & 0xf800) | (data & 0xe000) >> 5
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| (data & 0x7e0) >> 3 | (data & 0x600) >> 9;
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*o++ = (data & 0x1f) << 11 | (data & 0x1c) << 6
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| (data & 0xf8000000) >> 24 | (data & 0xe0000000) >> 29;
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*o++ = (data & 0x7e00000) >> 11 | (data & 0x6000000) >> 17
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| (data & 0x1f0000) >> 13 | (data & 0x1c0000) >> 18;
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#endif
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}
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/* check for last remaining pixel */
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if (width & 1) {
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register guint16 data;
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#ifdef LITTLE
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data = *((short *) s);
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#else
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data = *((short *) s);
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data = ((data >> 8) & 0xff) | ((data & 0xff) << 8);
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#endif
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((char *) o)[0] = ((data >> 8) & 0xf8) | ((data >> 13) & 0x7);
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((char *) o)[1] = ((data >> 3) & 0xfc) | ((data >> 9) & 0x3);
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((char *) o)[2] = ((data << 3) & 0xf8) | ((data >> 2) & 0x7);
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}
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srow += bpl;
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orow += rowstride;
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}
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}
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/*
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convert 16 bits/pixel data
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no alpha
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data in msb format
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*/
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static void
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rgb565msb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
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{
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int xx, yy;
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int width, height;
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int bpl;
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#ifdef LITTLE
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register guint8 *s; /* need to swap data order */
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#else
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register guint32 *s; /* read 2 pixels at once */
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#endif
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register guint16 *o;
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guint8 *srow = (guint8 *)image->data, *orow = pixels;
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width = image->width;
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height = image->height;
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bpl = image->bytes_per_line;
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for (yy = 0; yy < height; yy++) {
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#ifdef LITTLE
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s = srow;
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#else
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s = (guint32 *) srow;
|
||
#endif
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o = (guint16 *) orow;
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for (xx = 1; xx < width; xx += 2) {
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register guint32 data;
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#ifdef LITTLE
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/* swap endianness first */
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data = s[1] | s[0] << 8 | s[3] << 16 | s[2] << 24;
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s += 4;
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*o++ = (data & 0xf800) >> 8 | (data & 0xe000) >> 13
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| (data & 0x7e0) << 5 | (data & 0x600) >> 1;
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*o++ = (data & 0x1f) << 3 | (data & 0x1c) >> 2
|
||
| (data & 0xf8000000) >> 16 | (data & 0xe0000000) >> 21;
|
||
*o++ = (data & 0x7e00000) >> 19 | (data & 0x6000000) >> 25
|
||
| (data & 0x1f0000) >> 5 | (data & 0x1c0000) >> 10;
|
||
#else
|
||
data = *s++;
|
||
*o++ = (data & 0xf800) | (data & 0xe000) >> 5
|
||
| (data & 0x7e0) >> 3 | (data & 0x600) >> 9;
|
||
*o++ = (data & 0x1f) << 11 | (data & 0x1c) << 6
|
||
| (data & 0xf8000000) >> 24 | (data & 0xe0000000) >> 29;
|
||
*o++ = (data & 0x7e00000) >> 11 | (data & 0x6000000) >> 17
|
||
| (data & 0x1f0000) >> 13 | (data & 0x1c0000) >> 18;
|
||
#endif
|
||
}
|
||
/* check for last remaining pixel */
|
||
if (width & 1) {
|
||
register guint16 data;
|
||
#ifdef LITTLE
|
||
data = *((short *) s);
|
||
data = ((data >> 8) & 0xff) | ((data & 0xff) << 8);
|
||
#else
|
||
data = *((short *) s);
|
||
#endif
|
||
((char *) o)[0] = ((data >> 8) & 0xf8) | ((data >> 13) & 0x7);
|
||
((char *) o)[1] = ((data >> 3) & 0xfc) | ((data >> 9) & 0x3);
|
||
((char *) o)[2] = ((data << 3) & 0xf8) | ((data >> 2) & 0x7);
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
/*
|
||
convert 16 bits/pixel data
|
||
with alpha
|
||
data in lsb format
|
||
*/
|
||
static void
|
||
rgb565alsb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
#ifdef LITTLE
|
||
register guint16 *s; /* read 1 pixels at once */
|
||
#else
|
||
register guint8 *s;
|
||
#endif
|
||
register guint32 *o;
|
||
|
||
guint8 *srow = (guint8 *)image->data, *orow = pixels;
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bytes_per_line;
|
||
|
||
for (yy = 0; yy < height; yy++) {
|
||
#ifdef LITTLE
|
||
s = (guint16 *) srow;
|
||
#else
|
||
s = (guint8 *) srow;
|
||
#endif
|
||
o = (guint32 *) orow;
|
||
for (xx = 0; xx < width; xx ++) {
|
||
register guint32 data;
|
||
/* rrrrrggg gggbbbbb -> rrrrrRRR ggggggGG bbbbbBBB aaaaaaaa */
|
||
/* little endian: aaaaaaaa bbbbbBBB ggggggGG rrrrrRRR */
|
||
#ifdef LITTLE
|
||
data = *s++;
|
||
*o++ = (data & 0xf800) >> 8 | (data & 0xe000) >> 13
|
||
| (data & 0x7e0) << 5 | (data & 0x600) >> 1
|
||
| (data & 0x1f) << 19 | (data & 0x1c) << 14
|
||
| 0xff000000;
|
||
#else
|
||
/* swap endianness first */
|
||
data = s[0] | s[1] << 8;
|
||
s += 2;
|
||
*o++ = (data & 0xf800) << 16 | (data & 0xe000) << 11
|
||
| (data & 0x7e0) << 13 | (data & 0x600) << 7
|
||
| (data & 0x1f) << 11 | (data & 0x1c) << 6
|
||
| 0xff;
|
||
#endif
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
/*
|
||
convert 16 bits/pixel data
|
||
with alpha
|
||
data in msb format
|
||
*/
|
||
static void
|
||
rgb565amsb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
#ifdef LITTLE
|
||
register guint8 *s;
|
||
#else
|
||
register guint16 *s; /* read 1 pixels at once */
|
||
#endif
|
||
register guint32 *o;
|
||
|
||
guint8 *srow = (guint8 *)image->data, *orow = pixels;
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bytes_per_line;
|
||
|
||
for (yy = 0; yy < height; yy++) {
|
||
#ifdef LITTLE
|
||
s = srow;
|
||
#else
|
||
s = (guint16 *) srow;
|
||
#endif
|
||
o = (guint32 *) orow;
|
||
for (xx = 0; xx < width; xx ++) {
|
||
register guint32 data;
|
||
/* rrrrrggg gggbbbbb -> rrrrrRRR gggggg00 bbbbbBBB aaaaaaaa */
|
||
/* little endian: aaaaaaaa bbbbbBBB gggggg00 rrrrrRRR */
|
||
#ifdef LITTLE
|
||
/* swap endianness first */
|
||
data = s[0] | s[1] << 8;
|
||
s += 2;
|
||
*o++ = (data & 0xf800) >> 8 | (data & 0xe000) >> 13
|
||
| (data & 0x7e0) << 5 | (data & 0x600) >> 1
|
||
| (data & 0x1f) << 19 | (data & 0x1c) << 14
|
||
| 0xff000000;
|
||
#else
|
||
data = *s++;
|
||
*o++ = (data & 0xf800) << 16 | (data & 0xe000) << 11
|
||
| (data & 0x7e0) << 13 | (data & 0x600) << 7
|
||
| (data & 0x1f) << 11 | (data & 0x1c) << 6
|
||
| 0xff;
|
||
#endif
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
/*
|
||
convert 15 bits/pixel data
|
||
no alpha
|
||
data in lsb format
|
||
*/
|
||
static void
|
||
rgb555lsb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
#ifdef LITTLE
|
||
register guint32 *s; /* read 2 pixels at once */
|
||
#else
|
||
register guint8 *s; /* read 2 pixels at once */
|
||
#endif
|
||
register guint16 *o;
|
||
guint8 *srow = (guint8 *)image->data, *orow = pixels;
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bytes_per_line;
|
||
|
||
for (yy = 0; yy < height; yy++) {
|
||
#ifdef LITTLE
|
||
s = (guint32 *) srow;
|
||
#else
|
||
s = srow;
|
||
#endif
|
||
o = (guint16 *) orow;
|
||
for (xx = 1; xx < width; xx += 2) {
|
||
register guint32 data;
|
||
#ifdef LITTLE
|
||
data = *s++;
|
||
*o++ = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12
|
||
| (data & 0x3e0) << 6 | (data & 0x380) << 1;
|
||
*o++ = (data & 0x1f) << 3 | (data & 0x1c) >> 2
|
||
| (data & 0x7c000000) >> 15 | (data & 0x70000000) >> 20;
|
||
*o++ = (data & 0x3e00000) >> 18 | (data & 0x3800000) >> 23
|
||
| (data & 0x1f0000) >> 5 | (data & 0x1c0000) >> 10;
|
||
#else
|
||
/* swap endianness first */
|
||
data = s[1] | s[0] << 8 | s[3] << 16 | s[2] << 24;
|
||
s += 4;
|
||
*o++ = (data & 0x7c00) << 1 | (data & 0x7000) >> 4
|
||
| (data & 0x3e0) >> 2 | (data & 0x380) >> 7;
|
||
*o++ = (data & 0x1f) << 11 | (data & 0x1c) << 6
|
||
| (data & 0x7c000000) >> 23 | (data & 0x70000000) >> 28;
|
||
*o++ = (data & 0x3e00000) >> 10 | (data & 0x3800000) >> 15
|
||
| (data & 0x1f0000) >> 13 | (data & 0x1c0000) >> 18;
|
||
#endif
|
||
}
|
||
/* check for last remaining pixel */
|
||
if (width & 1) {
|
||
register guint16 data;
|
||
#ifdef LITTLE
|
||
data = *((short *) s);
|
||
#else
|
||
data = *((short *) s);
|
||
data = ((data >> 8) & 0xff) | ((data & 0xff) << 8);
|
||
#endif
|
||
((char *) o)[0] = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12;
|
||
((char *) o)[1] = (data & 0x3e0) >> 2 | (data & 0x380) >> 7;
|
||
((char *) o)[2] = (data & 0x1f) << 3 | (data & 0x1c) >> 2;
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
/*
|
||
convert 15 bits/pixel data
|
||
no alpha
|
||
data in msb format
|
||
*/
|
||
static void
|
||
rgb555msb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
#ifdef LITTLE
|
||
register guint8 *s; /* read 2 pixels at once */
|
||
#else
|
||
register guint32 *s; /* read 2 pixels at once */
|
||
#endif
|
||
register guint16 *o;
|
||
guint8 *srow = (guint8 *)image->data, *orow = pixels;
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bytes_per_line;
|
||
|
||
for (yy = 0; yy < height; yy++) {
|
||
#ifdef LITTLE
|
||
s = srow;
|
||
#else
|
||
s = (guint32 *) srow;
|
||
#endif
|
||
o = (guint16 *) orow;
|
||
for (xx = 1; xx < width; xx += 2) {
|
||
register guint32 data;
|
||
#ifdef LITTLE
|
||
/* swap endianness first */
|
||
data = s[1] | s[0] << 8 | s[3] << 16 | s[2] << 24;
|
||
s += 4;
|
||
*o++ = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12
|
||
| (data & 0x3e0) << 6 | (data & 0x380) << 1;
|
||
*o++ = (data & 0x1f) << 3 | (data & 0x1c) >> 2
|
||
| (data & 0x7c000000) >> 15 | (data & 0x70000000) >> 20;
|
||
*o++ = (data & 0x3e00000) >> 18 | (data & 0x3800000) >> 23
|
||
| (data & 0x1f0000) >> 5 | (data & 0x1c0000) >> 10;
|
||
#else
|
||
data = *s++;
|
||
*o++ = (data & 0x7c00) << 1 | (data & 0x7000) >> 4
|
||
| (data & 0x3e0) >> 2 | (data & 0x380) >> 7;
|
||
*o++ = (data & 0x1f) << 11 | (data & 0x1c) << 6
|
||
| (data & 0x7c000000) >> 23 | (data & 0x70000000) >> 28;
|
||
*o++ = (data & 0x3e00000) >> 10 | (data & 0x3800000) >> 15
|
||
| (data & 0x1f0000) >> 13 | (data & 0x1c0000) >> 18;
|
||
#endif
|
||
}
|
||
/* check for last remaining pixel */
|
||
if (width & 1) {
|
||
register guint16 data;
|
||
#ifdef LITTLE
|
||
data = *((short *) s);
|
||
data = ((data >> 8) & 0xff) | ((data & 0xff) << 8);
|
||
#else
|
||
data = *((short *) s);
|
||
#endif
|
||
((char *) o)[0] = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12;
|
||
((char *) o)[1] = (data & 0x3e0) >> 2 | (data & 0x380) >> 7;
|
||
((char *) o)[2] = (data & 0x1f) << 3 | (data & 0x1c) >> 2;
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
/*
|
||
convert 15 bits/pixel data
|
||
with alpha
|
||
data in lsb format
|
||
*/
|
||
static void
|
||
rgb555alsb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
#ifdef LITTLE
|
||
register guint16 *s; /* read 1 pixels at once */
|
||
#else
|
||
register guint8 *s;
|
||
#endif
|
||
register guint32 *o;
|
||
|
||
guint8 *srow = (guint8 *)image->data, *orow = pixels;
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bytes_per_line;
|
||
|
||
for (yy = 0; yy < height; yy++) {
|
||
#ifdef LITTLE
|
||
s = (guint16 *) srow;
|
||
#else
|
||
s = srow;
|
||
#endif
|
||
o = (guint32 *) orow;
|
||
for (xx = 0; xx < width; xx++) {
|
||
register guint32 data;
|
||
/* rrrrrggg gggbbbbb -> rrrrrRRR gggggGGG bbbbbBBB aaaaaaaa */
|
||
/* little endian: aaaaaaaa bbbbbBBB gggggGGG rrrrrRRR */
|
||
#ifdef LITTLE
|
||
data = *s++;
|
||
*o++ = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12
|
||
| (data & 0x3e0) << 6 | (data & 0x380) << 1
|
||
| (data & 0x1f) << 19 | (data & 0x1c) << 14
|
||
| 0xff000000;
|
||
#else
|
||
/* swap endianness first */
|
||
data = s[0] | s[1] << 8;
|
||
s += 2;
|
||
*o++ = (data & 0x7c00) << 17 | (data & 0x7000) << 12
|
||
| (data & 0x3e0) << 14 | (data & 0x380) << 9
|
||
| (data & 0x1f) << 11 | (data & 0x1c) << 6
|
||
| 0xff;
|
||
#endif
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
/*
|
||
convert 15 bits/pixel data
|
||
with alpha
|
||
data in msb format
|
||
*/
|
||
static void
|
||
rgb555amsb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
#ifdef LITTLE
|
||
register guint16 *s; /* read 1 pixels at once */
|
||
#else
|
||
register guint8 *s;
|
||
#endif
|
||
register guint32 *o;
|
||
|
||
guint8 *srow = (guint8 *)image->data, *orow = pixels;
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bytes_per_line;
|
||
|
||
for (yy = 0; yy < height; yy++) {
|
||
#ifdef LITTLE
|
||
s = (guint16 *) srow;
|
||
#else
|
||
s = srow;
|
||
#endif
|
||
o = (guint32 *) orow;
|
||
for (xx = 0; xx < width; xx++) {
|
||
register guint32 data;
|
||
/* rrrrrggg gggbbbbb -> rrrrrRRR gggggGGG bbbbbBBB aaaaaaaa */
|
||
/* little endian: aaaaaaaa bbbbbBBB gggggGGG rrrrrRRR */
|
||
#ifdef LITTLE
|
||
/* swap endianness first */
|
||
data = s[0] | s[1] << 8;
|
||
s += 2;
|
||
*o++ = (data & 0x7c00) >> 7 | (data & 0x7000) >> 12
|
||
| (data & 0x3e0) << 6 | (data & 0x380) << 1
|
||
| (data & 0x1f) << 19 | (data & 0x1c) << 14
|
||
| 0xff000000;
|
||
#else
|
||
data = *s++;
|
||
*o++ = (data & 0x7c00) << 17 | (data & 0x7000) << 12
|
||
| (data & 0x3e0) << 14 | (data & 0x380) << 9
|
||
| (data & 0x1f) << 11 | (data & 0x1c) << 6
|
||
| 0xff;
|
||
#endif
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
|
||
static void
|
||
rgb888alsb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
guint8 *s; /* for byte order swapping */
|
||
guint8 *o;
|
||
guint8 *srow = (guint8 *)image->data, *orow = pixels;
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bytes_per_line;
|
||
|
||
d (printf ("32 bits/pixel with alpha\n"));
|
||
|
||
/* lsb data */
|
||
for (yy = 0; yy < height; yy++) {
|
||
s = srow;
|
||
o = orow;
|
||
for (xx = 0; xx < width; xx++) {
|
||
*o++ = s[2];
|
||
*o++ = s[1];
|
||
*o++ = s[0];
|
||
*o++ = 0xff;
|
||
s += 4;
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
static void
|
||
rgb888lsb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
guint8 *srow = (guint8 *)image->data, *orow = pixels;
|
||
guint8 *o, *s;
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bytes_per_line;
|
||
|
||
d (printf ("32 bit, lsb, no alpha\n"));
|
||
|
||
for (yy = 0; yy < height; yy++) {
|
||
s = srow;
|
||
o = orow;
|
||
for (xx = 0; xx < width; xx++) {
|
||
*o++ = s[2];
|
||
*o++ = s[1];
|
||
*o++ = s[0];
|
||
s += 4;
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
static void
|
||
rgb888amsb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
guint8 *srow = (guint8 *)image->data, *orow = pixels;
|
||
#ifdef LITTLE
|
||
guint32 *o;
|
||
guint32 *s;
|
||
#else
|
||
guint8 *s; /* for byte order swapping */
|
||
guint8 *o;
|
||
#endif
|
||
|
||
d (printf ("32 bit, msb, with alpha\n"));
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bytes_per_line;
|
||
|
||
/* msb data */
|
||
for (yy = 0; yy < height; yy++) {
|
||
#ifdef LITTLE
|
||
s = (guint32 *) srow;
|
||
o = (guint32 *) orow;
|
||
#else
|
||
s = srow;
|
||
o = orow;
|
||
#endif
|
||
for (xx = 0; xx < width; xx++) {
|
||
#ifdef LITTLE
|
||
*o++ = s[1];
|
||
*o++ = s[2];
|
||
*o++ = s[3];
|
||
*o++ = 0xff;
|
||
s += 4;
|
||
#else
|
||
*o++ = (*s << 8) | 0xff; /* untested */
|
||
s++;
|
||
#endif
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
static void
|
||
rgb888msb (XImage *image, guchar *pixels, int rowstride, xlib_colormap *colormap)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
|
||
guint8 *srow = (guint8 *)image->data, *orow = pixels;
|
||
guint8 *s;
|
||
guint8 *o;
|
||
|
||
d (printf ("32 bit, msb, no alpha\n"));
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bytes_per_line;
|
||
|
||
for (yy = 0; yy < height; yy++) {
|
||
s = srow;
|
||
o = orow;
|
||
for (xx = 0; xx < width; xx++) {
|
||
*o++ = s[1];
|
||
*o++ = s[2];
|
||
*o++ = s[3];
|
||
s += 4;
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
/*
|
||
This should work correctly with any display/any endianness, but will probably
|
||
run quite slow
|
||
*/
|
||
static void
|
||
convert_real_slow (XImage *image, guchar *pixels, int rowstride, xlib_colormap *cmap, int alpha)
|
||
{
|
||
int xx, yy;
|
||
int width, height;
|
||
int bpl;
|
||
guint8 *srow = (guint8 *)image->data, *orow = pixels;
|
||
guint8 *o;
|
||
guint32 pixel;
|
||
Visual *v;
|
||
guint8 component;
|
||
int i;
|
||
int red_shift, red_prec, green_shift, green_prec, blue_shift, blue_prec;
|
||
|
||
width = image->width;
|
||
height = image->height;
|
||
bpl = image->bytes_per_line;
|
||
v = cmap->visual;
|
||
|
||
visual_decompose_mask (v->red_mask, &red_shift, &red_prec);
|
||
visual_decompose_mask (v->green_mask, &green_shift, &green_prec);
|
||
visual_decompose_mask (v->blue_mask, &blue_shift, &blue_prec);
|
||
|
||
d(printf("rgb mask/shift/prec = %x:%x:%x %d:%d:%d %d:%d:%d\n",
|
||
v->red_mask, v->green_mask, v->blue_mask,
|
||
red_shift, green_shift, blue_shift,
|
||
red_prec, green_prec, blue_prec));
|
||
|
||
for (yy = 0; yy < height; yy++) {
|
||
o = orow;
|
||
for (xx = 0; xx < width; xx++) {
|
||
pixel = XGetPixel (image, xx, yy);
|
||
switch (v->class) {
|
||
/* I assume this is right for static & greyscale's too? */
|
||
case StaticGray:
|
||
case GrayScale:
|
||
case StaticColor:
|
||
case PseudoColor:
|
||
*o++ = cmap->colors[pixel].red;
|
||
*o++ = cmap->colors[pixel].green;
|
||
*o++ = cmap->colors[pixel].blue;
|
||
break;
|
||
case TrueColor:
|
||
/* This is odd because it must sometimes shift left (otherwise
|
||
I'd just shift >> (*_shift - 8 + *_prec + <0-7>). This logic
|
||
should work for all bit sizes/shifts/etc. */
|
||
component = 0;
|
||
for (i = 24; i < 32; i += red_prec)
|
||
component |= ((pixel & v->red_mask) << (32 - red_shift - red_prec)) >> i;
|
||
*o++ = component;
|
||
component = 0;
|
||
for (i = 24; i < 32; i += green_prec)
|
||
component |= ((pixel & v->green_mask) << (32 - green_shift - green_prec)) >> i;
|
||
*o++ = component;
|
||
component = 0;
|
||
for (i = 24; i < 32; i += blue_prec)
|
||
component |= ((pixel & v->blue_mask) << (32 - blue_shift - blue_prec)) >> i;
|
||
*o++ = component;
|
||
break;
|
||
case DirectColor:
|
||
*o++ = cmap->colors[((pixel & v->red_mask) << (32 - red_shift - red_prec)) >> 24].red;
|
||
*o++ = cmap->colors[((pixel & v->green_mask) << (32 - green_shift - green_prec)) >> 24].green;
|
||
*o++ = cmap->colors[((pixel & v->blue_mask) << (32 - blue_shift - blue_prec)) >> 24].blue;
|
||
break;
|
||
}
|
||
if (alpha)
|
||
*o++ = 0xff;
|
||
}
|
||
srow += bpl;
|
||
orow += rowstride;
|
||
}
|
||
}
|
||
|
||
typedef void (* cfunc) (XImage *image, guchar *pixels, int rowstride, xlib_colormap *cmap);
|
||
|
||
static const cfunc convert_map[] = {
|
||
rgb1,rgb1,rgb1a,rgb1a,
|
||
rgb8,rgb8,rgb8a,rgb8a,
|
||
rgb555lsb,rgb555msb,rgb555alsb,rgb555amsb,
|
||
rgb565lsb,rgb565msb,rgb565alsb,rgb565amsb,
|
||
rgb888lsb,rgb888msb,rgb888alsb,rgb888amsb
|
||
};
|
||
|
||
/*
|
||
perform actual conversion
|
||
|
||
If we can, try and use the optimised code versions, but as a default
|
||
fallback, and always for direct colour, use the generic/slow but complete
|
||
conversion function.
|
||
*/
|
||
static void
|
||
rgbconvert (XImage *image, guchar *pixels, int rowstride, int alpha, xlib_colormap *cmap)
|
||
{
|
||
int index = (image->byte_order == MSBFirst) | (alpha != 0) << 1;
|
||
int bank=5; /* default fallback converter */
|
||
Visual *v = cmap->visual;
|
||
|
||
d(printf("masks = %x:%x:%x\n", v->red_mask, v->green_mask, v->blue_mask));
|
||
d(printf("image depth = %d, bpp = %d\n", image->depth, image->bits_per_pixel));
|
||
|
||
switch (v->class) {
|
||
/* I assume this is right for static & greyscale's too? */
|
||
case StaticGray:
|
||
case GrayScale:
|
||
case StaticColor:
|
||
case PseudoColor:
|
||
switch (image->bits_per_pixel) {
|
||
case 1:
|
||
bank = 0;
|
||
break;
|
||
case 8:
|
||
bank = 1;
|
||
break;
|
||
}
|
||
break;
|
||
case TrueColor:
|
||
switch (image->depth) {
|
||
case 15:
|
||
if (v->red_mask == 0x7c00 && v->green_mask == 0x3e0 && v->blue_mask == 0x1f
|
||
&& image->bits_per_pixel == 16)
|
||
bank = 2;
|
||
break;
|
||
case 16:
|
||
if (v->red_mask == 0xf800 && v->green_mask == 0x7e0 && v->blue_mask == 0x1f
|
||
&& image->bits_per_pixel == 16)
|
||
bank = 3;
|
||
break;
|
||
case 24:
|
||
case 32:
|
||
if (v->red_mask == 0xff0000 && v->green_mask == 0xff00 && v->blue_mask == 0xff
|
||
&& image->bits_per_pixel == 32)
|
||
bank = 4;
|
||
break;
|
||
}
|
||
break;
|
||
case DirectColor:
|
||
/* always use the slow version */
|
||
break;
|
||
}
|
||
|
||
d(printf("converting using conversion function in bank %d\n", bank));
|
||
|
||
if (bank==5) {
|
||
convert_real_slow(image, pixels, rowstride, cmap, alpha);
|
||
} else {
|
||
index |= bank << 2;
|
||
(* convert_map[index]) (image, pixels, rowstride, cmap);
|
||
}
|
||
}
|
||
|
||
static gboolean
|
||
xlib_window_is_viewable (Window w)
|
||
{
|
||
XWindowAttributes wa;
|
||
|
||
while (w != 0) {
|
||
Window parent, root, *children;
|
||
guint nchildren;
|
||
|
||
XGetWindowAttributes (gdk_pixbuf_dpy, w, &wa);
|
||
if (wa.map_state != IsViewable)
|
||
return FALSE;
|
||
|
||
if (!XQueryTree (gdk_pixbuf_dpy, w, &root,
|
||
&parent, &children, &nchildren))
|
||
return FALSE;
|
||
|
||
if (nchildren > 0)
|
||
XFree (children);
|
||
|
||
if ((parent == root) || (w == root))
|
||
return TRUE;
|
||
|
||
w = parent;
|
||
}
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
static gint
|
||
xlib_window_get_origin (Window w, gint *x, gint *y)
|
||
{
|
||
Window child;
|
||
return XTranslateCoordinates (gdk_pixbuf_dpy, w,
|
||
RootWindow (gdk_pixbuf_dpy,
|
||
gdk_pixbuf_screen),
|
||
0, 0, x, y, &child);
|
||
}
|
||
|
||
/* Exported functions */
|
||
|
||
/**
|
||
* gdk_pixbuf_xlib_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.
|
||
* @visual: A visual 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; in
|
||
* the latter case, NULL will be returned if not enough memory could be
|
||
* allocated for the pixbuf to be created.
|
||
**/
|
||
GdkPixbuf *
|
||
gdk_pixbuf_xlib_get_from_drawable (GdkPixbuf *dest,
|
||
Drawable src,
|
||
Colormap cmap, Visual *visual,
|
||
int src_x, int src_y,
|
||
int dest_x, int dest_y,
|
||
int width, int height)
|
||
{
|
||
guint src_width, src_height;
|
||
XImage *image;
|
||
int rowstride, bpp, alpha;
|
||
XWindowAttributes wa;
|
||
xlib_colormap *x_cmap;
|
||
gboolean is_pixmap;
|
||
|
||
/* General sanity checks */
|
||
|
||
g_return_val_if_fail (src != 0, NULL);
|
||
|
||
is_pixmap = drawable_is_pixmap (src);
|
||
|
||
if (is_pixmap) {
|
||
g_return_val_if_fail (cmap != 0, NULL);
|
||
g_return_val_if_fail (visual != NULL, NULL);
|
||
}
|
||
else
|
||
g_return_val_if_fail (xlib_window_is_viewable (src), NULL);
|
||
|
||
if (!dest)
|
||
g_return_val_if_fail (dest_x == 0 && dest_y == 0, NULL);
|
||
else {
|
||
g_return_val_if_fail (dest->colorspace == GDK_COLORSPACE_RGB, NULL);
|
||
g_return_val_if_fail (dest->n_channels == 3
|
||
|| dest->n_channels == 4, NULL);
|
||
g_return_val_if_fail (dest->bits_per_sample == 8, NULL);
|
||
}
|
||
|
||
/* Coordinate sanity checks */
|
||
|
||
if (!is_pixmap) {
|
||
XGetWindowAttributes (gdk_pixbuf_dpy, src, &wa);
|
||
src_width = wa.width;
|
||
src_height = wa.height;
|
||
} else {
|
||
Window root;
|
||
int tx, ty;
|
||
guint bwidth, depth;
|
||
XGetGeometry (gdk_pixbuf_dpy, src, &root, &tx, &ty,
|
||
&src_width, &src_height, &bwidth, &depth);
|
||
}
|
||
|
||
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 <= dest->width, NULL);
|
||
g_return_val_if_fail (dest_y + height <= dest->height, NULL);
|
||
}
|
||
|
||
if (!is_pixmap) {
|
||
int ret;
|
||
int src_xorigin, src_yorigin;
|
||
int screen_width, screen_height;
|
||
int screen_srcx, screen_srcy;
|
||
|
||
ret = xlib_window_get_origin (src, &src_xorigin, &src_yorigin);
|
||
g_return_val_if_fail (ret != FALSE, NULL);
|
||
|
||
screen_width = DisplayWidth (gdk_pixbuf_dpy, gdk_pixbuf_screen);
|
||
screen_height = DisplayHeight (gdk_pixbuf_dpy, gdk_pixbuf_screen);
|
||
|
||
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);
|
||
}
|
||
|
||
/* Get Image in ZPixmap format (packed bits). */
|
||
image = XGetImage (gdk_pixbuf_dpy, src, src_x, src_y,
|
||
width, height, AllPlanes, ZPixmap);
|
||
g_return_val_if_fail (image != NULL, NULL);
|
||
|
||
/* Create the pixbuf if needed */
|
||
if (!dest) {
|
||
dest = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
|
||
FALSE, 8, width, height);
|
||
if (!dest) {
|
||
XDestroyImage (image);
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
/* Get the colormap if needed */
|
||
if (!is_pixmap)
|
||
{
|
||
cmap = wa.colormap;
|
||
visual = wa.visual;
|
||
}
|
||
|
||
x_cmap = xlib_get_colormap (cmap, visual);
|
||
|
||
alpha = dest->has_alpha;
|
||
rowstride = dest->rowstride;
|
||
bpp = alpha ? 4 : 3;
|
||
|
||
/* we offset into the image data based on the position we are retrieving from */
|
||
rgbconvert (image, dest->pixels +
|
||
(dest_y * rowstride) + (dest_x * bpp),
|
||
rowstride,
|
||
alpha,
|
||
x_cmap);
|
||
|
||
xlib_colormap_free (x_cmap);
|
||
XDestroyImage (image);
|
||
|
||
return dest;
|
||
}
|