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Diffstat (limited to 'ksvg/impl/libs/xrgbrender/gdk-pixbuf-xlib-drawable.c')
-rw-r--r--ksvg/impl/libs/xrgbrender/gdk-pixbuf-xlib-drawable.c1137
1 files changed, 1137 insertions, 0 deletions
diff --git a/ksvg/impl/libs/xrgbrender/gdk-pixbuf-xlib-drawable.c b/ksvg/impl/libs/xrgbrender/gdk-pixbuf-xlib-drawable.c
new file mode 100644
index 00000000..01f60976
--- /dev/null
+++ b/ksvg/impl/libs/xrgbrender/gdk-pixbuf-xlib-drawable.c
@@ -0,0 +1,1137 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* GdkPixbuf library - convert X drawable information to RGB
+ *
+ * Copyright (C) 1999 Michael Zucchi
+ *
+ * Authors: Michael Zucchi <zucchi@zedzone.mmc.com.au>
+ * Cody Russell <bratsche@dfw.net>
+ * Federico Mena-Quintero <federico@gimp.org>
+ *
+ * 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., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+/* Ported to Xlib by John Harper <john@dcs.warwick.ac.uk> */
+
+
+#include <config.h>
+#include <stdio.h>
+#include <string.h>
+#include "gdk-pixbuf-xlib-private.h"
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+#if (X_BYTE_ORDER == X_LITTLE_ENDIAN)
+#define LITTLE
+#endif
+#define d(x)
+
+
+
+static unsigned int mask_table[] = {
+ 0x00000000, 0x00000001, 0x00000003, 0x00000007,
+ 0x0000000f, 0x0000001f, 0x0000003f, 0x0000007f,
+ 0x000000ff, 0x000001ff, 0x000003ff, 0x000007ff,
+ 0x00000fff, 0x00001fff, 0x00003fff, 0x00007fff,
+ 0x0000ffff, 0x0001ffff, 0x0003ffff, 0x0007ffff,
+ 0x000fffff, 0x001fffff, 0x003fffff, 0x007fffff,
+ 0x00ffffff, 0x01ffffff, 0x03ffffff, 0x07ffffff,
+ 0x0fffffff, 0x1fffffff, 0x3fffffff, 0x7fffffff,
+ 0xffffffff
+};
+
+
+/* color handling */
+
+typedef struct xlib_colormap_struct xlib_colormap;
+struct xlib_colormap_struct {
+ int size;
+ XColor *colors;
+ Visual *visual;
+ Colormap colormap;
+};
+
+
+/* from gdkvisual.c */
+static void
+visual_decompose_mask (unsigned long mask,
+ int *shift,
+ int *prec)
+{
+ *shift = 0;
+ *prec = 0;
+
+ while (!(mask & 0x1)) {
+ (*shift)++;
+ mask >>= 1;
+ }
+
+ while (mask & 0x1) {
+ (*prec)++;
+ mask >>= 1;
+ }
+}
+
+static int x_error;
+
+static int
+handle_x_error (Display *dpy, XErrorEvent *ev)
+{
+ x_error = 1;
+ return 0;
+}
+
+static int
+drawable_is_pixmap (Drawable d)
+{
+ /* copied from Imlib */
+
+ XErrorHandler errh;
+ XWindowAttributes wa;
+ int is_pixmap;
+
+ errh = XSetErrorHandler (handle_x_error);
+ x_error = 0;
+ XGetWindowAttributes (gdk_pixbuf_dpy, d, &wa);
+ XSync (gdk_pixbuf_dpy, False);
+ is_pixmap = x_error;
+ XSetErrorHandler (errh);
+
+ return is_pixmap;
+}
+
+
+
+/*
+ convert 1 bits-pixel data
+ no alpha
+*/
+static void
+rgb1 (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+ unsigned char *s;
+ register unsigned char data;
+ unsigned char *o;
+ unsigned char *srow = image->data, *orow = pixels;
+
+ d (printf ("1 bits/pixel\n"));
+
+ /* convert upto 8 pixels/time */
+ /* its probably not worth trying to make this run very fast, who uses
+ 1 bit displays anymore? */
+ 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 ++) {
+ data = srow[xx >> 3] >> (7 - (xx & 7)) & 1;
+ *o++ = colormap->colors[data].red;
+ *o++ = colormap->colors[data].green;
+ *o++ = colormap->colors[data].blue;
+ }
+ srow += bpl;
+ orow += rowstride;
+ }
+}
+
+/*
+ convert 1 bits/pixel data
+ with alpha
+*/
+static void
+rgb1a (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+ unsigned char *s;
+ register unsigned char data;
+ unsigned char *o;
+ unsigned char *srow = image->data, *orow = pixels;
+ unsigned int remap[2];
+
+ d (printf ("1 bits/pixel\n"));
+
+ /* convert upto 8 pixels/time */
+ /* its probably not worth trying to make this run very fast, who uses
+ 1 bit displays anymore? */
+ width = image->width;
+ height = image->height;
+ bpl = image->bytes_per_line;
+
+ for (xx = 0; xx < 2; xx++) {
+#ifdef LITTLE
+ remap[xx] = 0xff000000
+ | 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].blue << 8;
+#endif
+ }
+
+ for (yy = 0; yy < height; yy++) {
+ s = srow;
+ o = orow;
+
+ for (xx = 0; xx < width; xx ++) {
+ data = srow[xx >> 3] >> (7 - (xx & 7)) & 1;
+ *o++ = remap[data];
+ }
+ srow += bpl;
+ orow += rowstride;
+ }
+}
+
+/*
+ convert 8 bits/pixel data
+ no alpha
+*/
+static void
+rgb8 (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+ unsigned int mask;
+ register unsigned int data;
+ unsigned char *srow = image->data, *orow = pixels;
+ register unsigned char *s;
+ register unsigned char *o;
+
+ width = image->width;
+ height = image->height;
+ bpl = image->bytes_per_line;
+
+ d (printf ("8 bit, no alpha output\n"));
+
+ mask = mask_table[image->depth];
+
+ for (yy = 0; yy < height; yy++) {
+ s = srow;
+ o = orow;
+ for (xx = 0; xx < width; xx++) {
+ data = *s++ & mask;
+ *o++ = colormap->colors[data].red;
+ *o++ = colormap->colors[data].green;
+ *o++ = colormap->colors[data].blue;
+ }
+ srow += bpl;
+ orow += rowstride;
+ }
+}
+
+/*
+ convert 8 bits/pixel data
+ with alpha
+*/
+static void
+rgb8a (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+ unsigned int mask;
+ register unsigned int data;
+ unsigned int remap[256];
+ register unsigned char *s; /* read 2 pixels at once */
+ register unsigned int *o;
+ unsigned char *srow = image->data, *orow = pixels;
+
+ width = image->width;
+ height = image->height;
+ bpl = image->bytes_per_line;
+
+ d (printf ("8 bit, with alpha output\n"));
+
+ mask = mask_table[image->depth];
+
+ 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].red;
+#else
+ remap[xx] = 0xff
+ | colormap->colors[xx].red << 24
+ | colormap->colors[xx].green << 16
+ | colormap->colors[xx].blue << 8;
+#endif
+ }
+
+ for (yy = 0; yy < height; yy++) {
+ s = srow;
+ o = (unsigned int *) orow;
+ for (xx = 0; xx < width; xx ++) {
+ data = *s++ & mask;
+ *o++ = remap[data];
+ }
+ srow += bpl;
+ orow += rowstride;
+ }
+}
+
+/*
+ convert 16 bits/pixel data
+ no alpha
+ data in lsb format
+*/
+static void
+rgb565lsb (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+
+#ifdef LITTLE
+ register unsigned int *s; /* read 2 pixels at once */
+#else
+ register unsigned char *s; /* read 2 pixels at once */
+#endif
+ register unsigned short *o;
+ unsigned char *srow = image->data, *orow = pixels;
+
+ width = image->width;
+ height = image->height;
+ bpl = image->bytes_per_line;
+
+ for (yy = 0; yy < height; yy++) {
+#ifdef LITTLE
+ s = (unsigned int *) srow;
+#else
+ s = srow;
+#endif
+ o = (unsigned short *) orow;
+ for (xx = 1; xx < width; xx += 2) {
+ register unsigned int data;
+#ifdef LITTLE
+ data = *s++;
+ *o++ = (data & 0xf800) >> 8 | (data & 0xe000) >> 13
+ | (data & 0x7e0) << 5 | (data & 0x600) >> 1;
+ *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
+ /* swap endianness first */
+ data = s[0] | s[1] << 8 | s[2] << 16 | s[3] << 24;
+ s += 4;
+ *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 unsigned short data;
+#ifdef LITTLE
+ data = *((short *) s);
+#else
+ data = *((short *) s);
+ data = ((data >> 8) & 0xff) | ((data & 0xff) << 8);
+#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
+ no alpha
+ data in msb format
+*/
+static void
+rgb565msb (XImage *image, unsigned char *pixels, int rowstride, xlib_colormap *colormap)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+
+#ifdef LITTLE
+ register unsigned char *s; /* need to swap data order */
+#else
+ register unsigned int *s; /* read 2 pixels at once */
+#endif
+ register unsigned short *o;
+ unsigned char *srow = 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 = (unsigned int *) srow;
+#endif
+ o = (unsigned short *) orow;
+ for (xx = 1; xx < width; xx += 2) {
+ register unsigned int data;
+#ifdef LITTLE
+ /* swap endianness first */
+ data = s[0] | s[1] << 8 | s[2] << 16 | s[3] << 24;
+ s += 4;
+ *o++ = (data & 0xf800) >> 8 | (data & 0xe000) >> 13
+ | (data & 0x7e0) << 5 | (data & 0x600) >> 1;
+ *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 unsigned short 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, unsigned char *pixels, int rowstride, xlib_colormap *colormap)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+
+#ifdef LITTLE
+ register unsigned short *s; /* read 1 pixels at once */
+#else
+ register unsigned char *s;
+#endif
+ register unsigned int *o;
+
+ unsigned char *srow = image->data, *orow = pixels;
+
+ width = image->width;
+ height = image->height;
+ bpl = image->bytes_per_line;
+
+ for (yy = 0; yy < height; yy++) {
+#ifdef LITTLE
+ s = (unsigned short *) srow;
+#else
+ s = (unsigned char *) srow;
+#endif
+ o = (unsigned int *) orow;
+ for (xx = 0; xx < width; xx ++) {
+ register unsigned int 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, unsigned char *pixels, int rowstride, xlib_colormap *colormap)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+
+#ifdef LITTLE
+ register unsigned char *s;
+#else
+ register unsigned short *s; /* read 1 pixels at once */
+#endif
+ register unsigned int *o;
+
+ unsigned char *srow = image->data, *orow = pixels;
+
+ width = image->width;
+ height = image->height;
+ bpl = image->bytes_per_line;
+
+ for (yy = 0; yy < height; yy++) {
+ s = srow;
+ o = (unsigned int *) orow;
+ for (xx = 0; xx < width; xx ++) {
+ register unsigned int 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, unsigned char *pixels, int rowstride, xlib_colormap *colormap)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+
+#ifdef LITTLE
+ register unsigned int *s; /* read 2 pixels at once */
+#else
+ register unsigned char *s; /* read 2 pixels at once */
+#endif
+ register unsigned short *o;
+ unsigned char *srow = image->data, *orow = pixels;
+
+ width = image->width;
+ height = image->height;
+ bpl = image->bytes_per_line;
+
+ for (yy = 0; yy < height; yy++) {
+#ifdef LITTLE
+ s = (unsigned int *) srow;
+#else
+ s = srow;
+#endif
+ o = (unsigned short *) orow;
+ for (xx = 1; xx < width; xx += 2) {
+ register unsigned int 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[0] | s[1] << 8 | s[2] << 16 | s[3] << 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 unsigned short 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, unsigned char *pixels, int rowstride, xlib_colormap *colormap)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+
+#ifdef LITTLE
+ register unsigned char *s; /* read 2 pixels at once */
+#else
+ register unsigned int *s; /* read 2 pixels at once */
+#endif
+ register unsigned short *o;
+ unsigned char *srow = image->data, *orow = pixels;
+
+ width = image->width;
+ height = image->height;
+ bpl = image->bytes_per_line;
+
+ for (yy = 0; yy < height; yy++) {
+ s = srow;
+ o = (unsigned short *) orow;
+ for (xx = 1; xx < width; xx += 2) {
+ register unsigned int data;
+#ifdef LITTLE
+ /* swap endianness first */
+ data = s[0] | s[1] << 8 | s[2] << 16 | s[3] << 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 unsigned short 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, unsigned char *pixels, int rowstride, xlib_colormap *colormap)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+
+#ifdef LITTLE
+ register unsigned short *s; /* read 1 pixels at once */
+#else
+ register unsigned char *s;
+#endif
+ register unsigned int *o;
+
+ unsigned char *srow = image->data, *orow = pixels;
+
+ width = image->width;
+ height = image->height;
+ bpl = image->bytes_per_line;
+
+ for (yy = 0; yy < height; yy++) {
+#ifdef LITTLE
+ s = (unsigned short *) srow;
+#else
+ s = srow;
+#endif
+ o = (unsigned int *) orow;
+ for (xx = 0; xx < width; xx++) {
+ register unsigned int 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, unsigned char *pixels, int rowstride, xlib_colormap *colormap)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+
+#ifdef LITTLE
+ register unsigned short *s; /* read 1 pixels at once */
+#else
+ register unsigned char *s;
+#endif
+ register unsigned int *o;
+
+ unsigned char *srow = image->data, *orow = pixels;
+
+ width = image->width;
+ height = image->height;
+ bpl = image->bytes_per_line;
+
+ for (yy = 0; yy < height; yy++) {
+#ifdef LITTLE
+ s = (unsigned short *) srow;
+#else
+ s = srow;
+#endif
+ o = (unsigned int *) orow;
+ for (xx = 0; xx < width; xx++) {
+ register unsigned int 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, unsigned char *pixels, int rowstride, xlib_colormap *colormap)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+
+ unsigned char *s; /* for byte order swapping */
+ unsigned char *o;
+ unsigned char *srow = 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, unsigned char *pixels, int rowstride, xlib_colormap *colormap)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+
+ unsigned char *srow = image->data, *orow = pixels;
+ unsigned char *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, unsigned char *pixels, int rowstride, xlib_colormap *colormap)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+
+ unsigned char *srow = image->data, *orow = pixels;
+#ifdef LITTLE
+ unsigned int *o;
+ unsigned int *s;
+#else
+ unsigned char *s; /* for byte order swapping */
+ unsigned char *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 = (unsigned int *) srow;
+ o = (unsigned int *) 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, unsigned char *pixels, int rowstride, xlib_colormap *colormap)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+
+ unsigned char *srow = image->data, *orow = pixels;
+ unsigned char *s;
+ unsigned char *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, unsigned char *pixels, int rowstride, xlib_colormap *cmap, int alpha)
+{
+ int xx, yy;
+ int width, height;
+ int bpl;
+ unsigned char *srow = image->data, *orow = pixels;
+ unsigned char *s;
+ unsigned char *o;
+ unsigned int pixel;
+ Visual *v;
+ unsigned char 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++) {
+ s = srow;
+ 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, unsigned char *pixels, int rowstride, xlib_colormap *cmap);
+
+static 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, unsigned char *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 int
+xlib_window_is_viewable (Window w)
+{
+ XWindowAttributes wa;
+
+ while (w != 0) {
+ Window parent, root, *children;
+ int nchildren;
+
+ XGetWindowAttributes (gdk_pixbuf_dpy, w, &wa);
+ if (wa.map_state != IsViewable)
+ return 0;
+
+ if (!XQueryTree (gdk_pixbuf_dpy, w, &root,
+ &parent, &children, &nchildren))
+ return 0;
+
+ if (nchildren > 0)
+ XFree (children);
+
+ if (parent == root)
+ return 1;
+
+ w = parent;
+ }
+
+ return 0;
+}
+
+static int
+xlib_window_get_origin (Window w, int *x, int *y)
+{
+ Window child;
+ return XTranslateCoordinates (gdk_pixbuf_dpy, w,
+ RootWindow (gdk_pixbuf_dpy,
+ gdk_pixbuf_screen),
+ 0, 0, x, y, &child);
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-27 05:29:21 +0000