gtk/gdk/gdkrgb.c
Tor Lillqvist abda40ede4 Fix some bugs, and introduce a minor feature.
2002-04-04  Tor Lillqvist  <tml@iki.fi>

	* gdk/gdkrgb.c: Fix some bugs, and introduce a minor feature.

	(gdk_rgb_convert_4_pack): New function, for 16-color (4 bits per
	pixel) static visuals (fixes #858).

	(gdk_rgb_convert_gray4_pack, gdk_rgb_convert_gray4_d_pack): Fix
	same bugs in both functions: Odd start coordinate (partial byte)
	was not handled correctly. Also a partial final byte was not
	handled correctly.

	(gdk_rgb_do_colormaps): Use G_N_ELEMENTS.
	(gdk_rgb_create_info): For pseudocolor visuals, use the 2x2x2
	colorcube only for depths 3 and 4. For static color, use it for
	depths 3..7 like before. (Depth 5..7 pseudocolor probably never
	occurs on X11. It doesn't normally occur on Win32 either, but
	there is experimental code in gdkvisual-win32.c to let the user
	restrict the size of palette used.)
	(gdk_rgb_init): Set gdk_rgb_verbose if the GDK_DEBUG_GDKRGB flag
	is set.
	(gdk_rgb_select_conv): Use gdk_rgb_convert_8 also for depths 5, 6
	and 7 (see above). Use gdk_rgb_convert_4_pack for 4 bits per pixel
	static color.
2002-04-04 20:23:56 +00:00

3483 lines
146 KiB
C

/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* For more information on GdkRgb, see http://www.levien.com/gdkrgb/
Raph Levien <raph@acm.org>
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include <math.h>
#if HAVE_CONFIG_H
# include <config.h>
# if STDC_HEADERS
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# endif
#else
# include <stdio.h>
# include <stdlib.h>
#endif
#define ENABLE_GRAYSCALE
#include "config.h"
#include "gdkprivate.h"
#include "gdkinternals.h" /* _gdk_windowing_get_bits_for_depth() */
#include "gdkrgb.h"
typedef struct _GdkRgbInfo GdkRgbInfo;
typedef struct _GdkRgbCmapInfo GdkRgbCmapInfo;
typedef void (*GdkRgbConvFunc) (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0,
gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align,
GdkRgbCmap *cmap);
static const gchar* visual_names[] =
{
"static gray",
"grayscale",
"static color",
"pseudo color",
"true color",
"direct color",
};
#define STAGE_ROWSTRIDE (GDK_SCRATCH_IMAGE_WIDTH * 3)
/* Some of these fields should go, as they're not being used at all. (?)
*/
struct _GdkRgbInfo
{
GdkVisual *visual;
GdkColormap *cmap;
guint nred_shades;
guint ngreen_shades;
guint nblue_shades;
guint ngray_shades;
guint nreserved;
guint bpp;
gint cmap_alloced;
gdouble gamma;
/* Generally, the stage buffer is used to convert 32bit RGB, gray,
and indexed images into 24 bit packed RGB. */
guchar *stage_buf;
GdkRgbCmap *gray_cmap;
gboolean dith_default;
gboolean bitmap; /* set true if in 1 bit per pixel mode */
GdkGC *own_gc;
/* Convert functions */
GdkRgbConvFunc conv;
GdkRgbConvFunc conv_d;
GdkRgbConvFunc conv_32;
GdkRgbConvFunc conv_32_d;
GdkRgbConvFunc conv_gray;
GdkRgbConvFunc conv_gray_d;
GdkRgbConvFunc conv_indexed;
GdkRgbConvFunc conv_indexed_d;
guchar *colorcube;
guchar *colorcube_d;
/* We need to track LUT's for pairs of GdkRgbInfo / GdkRgbCmap, so we
* keep a list of pointers to GdkRgbCmapInfo on both structures so we
* can remove as necessary when freeing a GdkRgbInfo or GdkRgbCmap
*/
GSList *cmap_info_list;
};
struct _GdkRgbCmapInfo
{
GdkRgbInfo *image_info;
GdkRgbCmap *cmap;
guchar lut[256]; /* For 8-bit modes */
};
static GdkRgbCmapInfo *gdk_rgb_cmap_get_info (GdkRgbCmap *cmap, GdkRgbInfo *image_info);
static const char *gdk_rgb_key = "gdk-rgb-info";
static GQuark gdk_rgb_quark = 0;
static gboolean gdk_rgb_install_cmap = FALSE;
static gint gdk_rgb_min_colors = 5 * 5 * 5;
static gboolean gdk_rgb_verbose = FALSE;
static gint
gdk_rgb_cmap_fail (const char *msg, GdkColormap *cmap, gulong *pixels)
{
gulong free_pixels[256];
gint n_free;
gint i;
#ifdef VERBOSE
g_print ("%s", msg);
#endif
n_free = 0;
for (i = 0; i < 256; i++)
if (pixels[i] < 256)
free_pixels[n_free++] = pixels[i];
if (n_free)
gdk_colors_free (cmap, free_pixels, n_free, 0);
return 0;
}
static void
gdk_rgb_make_colorcube (GdkRgbInfo *image_info, gulong *pixels,
gint nr, gint ng, gint nb)
{
guchar rt[16], gt[16], bt[16];
gint i;
image_info->colorcube = g_new (guchar, 4096);
for (i = 0; i < 16; i++)
{
rt[i] = ng * nb * ((i * 17 * (nr - 1) + 128) >> 8);
gt[i] = nb * ((i * 17 * (ng - 1) + 128) >> 8);
bt[i] = ((i * 17 * (nb - 1) + 128) >> 8);
}
for (i = 0; i < 4096; i++)
{
image_info->colorcube[i] = pixels[rt[i >> 8] + gt[(i >> 4) & 0x0f] + bt[i & 0x0f]];
#ifdef VERBOSE
g_print ("%03x %02x %x %x %x\n", i, image-info->colorcube[i], rt[i >> 8], gt[(i >> 4) & 0x0f], bt[i & 0x0f]);
#endif
}
}
/* this is the colorcube suitable for dithering */
static void
gdk_rgb_make_colorcube_d (GdkRgbInfo *image_info, gulong *pixels,
gint nr, gint ng, gint nb)
{
gint r, g, b;
gint i;
image_info->colorcube_d = g_new (guchar, 512);
for (i = 0; i < 512; i++)
{
r = MIN (nr - 1, i >> 6);
g = MIN (ng - 1, (i >> 3) & 7);
b = MIN (nb - 1, i & 7);
image_info->colorcube_d[i] = pixels[(r * ng + g) * nb + b];
}
}
/* Try installing a color cube of the specified size.
Make the colorcube and return TRUE on success */
static gint
gdk_rgb_try_colormap (GdkRgbInfo *image_info, gboolean force,
gint nr, gint ng, gint nb)
{
gint r, g, b;
gint ri, gi, bi;
gint r0, g0, b0;
GdkColormap *cmap;
GdkColor color;
gulong pixels[256];
gulong junk[256];
gint i;
gint d2;
gint colors_needed;
gint idx;
gint best[256];
if (!force && nr * ng * nb < gdk_rgb_min_colors)
return FALSE;
if (image_info->cmap)
cmap = image_info->cmap;
else
cmap = gdk_colormap_get_system ();
colors_needed = nr * ng * nb;
for (i = 0; i < 256; i++)
{
best[i] = 192;
pixels[i] = 256;
}
#ifndef GAMMA
if (cmap == gdk_colormap_get_system())
/* find color cube colors that are already present */
for (i = 0; i < MIN (256, cmap->size); i++)
{
r = cmap->colors[i].red >> 8;
g = cmap->colors[i].green >> 8;
b = cmap->colors[i].blue >> 8;
ri = (r * (nr - 1) + 128) >> 8;
gi = (g * (ng - 1) + 128) >> 8;
bi = (b * (nb - 1) + 128) >> 8;
r0 = ri * 255 / (nr - 1);
g0 = gi * 255 / (ng - 1);
b0 = bi * 255 / (nb - 1);
idx = ((ri * nr) + gi) * nb + bi;
d2 = (r - r0) * (r - r0) + (g - g0) * (g - g0) + (b - b0) * (b - b0);
if (d2 < best[idx]) {
if (pixels[idx] < 256)
gdk_colors_free (cmap, pixels + idx, 1, 0);
else
colors_needed--;
color = cmap->colors[i];
if (!gdk_colormap_alloc_color (cmap, &color, FALSE, FALSE))
return gdk_rgb_cmap_fail ("error allocating system color\n",
cmap, pixels);
pixels[idx] = color.pixel; /* which is almost certainly i */
best[idx] = d2;
}
}
#endif
if (colors_needed)
{
if (!gdk_colors_alloc (cmap, 0, NULL, 0, junk, colors_needed))
{
char tmp_str[80];
sprintf (tmp_str,
"%d %d %d colormap failed (in gdk_colors_alloc)\n",
nr, ng, nb);
return gdk_rgb_cmap_fail (tmp_str, cmap, pixels);
}
gdk_colors_free (cmap, junk, colors_needed, 0);
}
for (r = 0, i = 0; r < nr; r++)
for (g = 0; g < ng; g++)
for (b = 0; b < nb; b++, i++)
{
if (pixels[i] == 256)
{
color.red = r * 65535 / (nr - 1);
color.green = g * 65535 / (ng - 1);
color.blue = b * 65535 / (nb - 1);
#ifdef GAMMA
color.red = 65535 * pow (color.red / 65535.0, 0.5);
color.green = 65535 * pow (color.green / 65535.0, 0.5);
color.blue = 65535 * pow (color.blue / 65535.0, 0.5);
#endif
if (!gdk_colormap_alloc_color (cmap, &color, FALSE, force))
{
char tmp_str[80];
sprintf (tmp_str, "%d %d %d colormap failed\n",
nr, ng, nb);
return gdk_rgb_cmap_fail (tmp_str,
cmap, pixels);
}
pixels[i] = color.pixel;
}
#ifdef VERBOSE
g_print ("%d: %lx\n", i, pixels[i]);
#endif
}
image_info->nred_shades = nr;
image_info->ngreen_shades = ng;
image_info->nblue_shades = nb;
gdk_rgb_make_colorcube (image_info, pixels, nr, ng, nb);
gdk_rgb_make_colorcube_d (image_info, pixels, nr, ng, nb);
return TRUE;
}
/* Return TRUE on success. */
static gboolean
gdk_rgb_do_colormaps (GdkRgbInfo *image_info, gboolean force)
{
static const gint sizes[][3] = {
/* { 6, 7, 6 }, */
{ 6, 6, 6 },
{ 6, 6, 5 },
{ 6, 6, 4 },
{ 5, 5, 5 },
{ 5, 5, 4 },
{ 4, 4, 4 },
{ 4, 4, 3 },
{ 3, 3, 3 },
{ 2, 2, 2 }
};
static const gint n_sizes = G_N_ELEMENTS (sizes);
gint i;
/* Try the possible sizes. If the force parameter is set to TRUE
* and all larger sizes fail, force the larger size to succeed -
* this will involve allowing closest matches when allocating the
* colors
*/
for (i = 0; i < n_sizes; i++)
if (gdk_rgb_try_colormap (image_info,
(i == n_sizes - 1 ) && force,
sizes[i][0], sizes[i][1], sizes[i][2]))
return TRUE;
return FALSE;
}
/* Make a 2 x 2 x 2 colorcube */
static void
gdk_rgb_colorcube_222 (GdkRgbInfo *image_info)
{
int i;
GdkColor color;
image_info->colorcube_d = g_new (guchar, 512);
for (i = 0; i < 8; i++)
{
color.red = ((i & 4) >> 2) * 65535;
color.green = ((i & 2) >> 1) * 65535;
color.blue = (i & 1) * 65535;
gdk_colormap_alloc_color (image_info->cmap, &color, FALSE, TRUE);
image_info->colorcube_d[((i & 4) << 4) | ((i & 2) << 2) | (i & 1)] = color.pixel;
}
}
void
gdk_rgb_set_verbose (gboolean verbose)
{
gdk_rgb_verbose = verbose;
}
void
gdk_rgb_set_install (gboolean install)
{
gdk_rgb_install_cmap = install;
}
void
gdk_rgb_set_min_colors (gint min_colors)
{
gdk_rgb_min_colors = min_colors;
}
/* Return a "score" based on the following criteria (in hex):
x000 is the quality - 1 is 1bpp, 2 is 4bpp,
4 is 8bpp,
7 is 15bpp truecolor, 8 is 16bpp truecolor,
9 is 24bpp truecolor.
0x00 is the speed - 1 is the normal case,
2 means faster than normal
00x0 gets a point for being the system visual
000x gets a point for being pseudocolor
A caveat: in the 8bpp modes, being the system visual seems to be
quite important. Thus, all of the 8bpp modes should be ranked at
the same speed.
*/
static guint32
gdk_rgb_score_visual (GdkVisual *visual)
{
guint32 quality, speed, sys, pseudo;
quality = 0;
speed = 1;
sys = 0;
if (visual->type == GDK_VISUAL_TRUE_COLOR ||
visual->type == GDK_VISUAL_DIRECT_COLOR)
{
if (visual->depth == 24)
{
quality = 9;
/* Should test for MSB visual here, and set speed if so. */
}
else if (visual->depth == 16)
quality = 8;
else if (visual->depth == 15)
quality = 7;
else if (visual->depth == 8)
quality = 4;
}
else if (visual->type == GDK_VISUAL_PSEUDO_COLOR ||
visual->type == GDK_VISUAL_STATIC_COLOR)
{
if (visual->depth == 8)
quality = 4;
else if (visual->depth == 4)
quality = 2;
else if (visual->depth == 1)
quality = 1;
}
else if (visual->type == GDK_VISUAL_STATIC_GRAY
#ifdef ENABLE_GRAYSCALE
|| visual->type == GDK_VISUAL_GRAYSCALE
#endif
)
{
if (visual->depth == 8)
quality = 4;
else if (visual->depth == 4)
quality = 2;
else if (visual->depth == 1)
quality = 1;
}
if (quality == 0)
return 0;
sys = (visual == gdk_visual_get_system ());
pseudo = (visual->type == GDK_VISUAL_PSEUDO_COLOR || visual->type == GDK_VISUAL_TRUE_COLOR);
if (gdk_rgb_verbose)
g_print ("Visual type = %s, depth = %d, %x:%x:%x%s; score=%x\n",
visual_names[visual->type],
visual->depth,
visual->red_mask,
visual->green_mask,
visual->blue_mask,
sys ? " (system)" : "",
(quality << 12) | (speed << 8) | (sys << 4) | pseudo);
return (quality << 12) | (speed << 8) | (sys << 4) | pseudo;
}
static GdkVisual *
gdk_rgb_choose_visual (void)
{
GList *visuals, *tmp_list;
guint32 score, best_score;
GdkVisual *visual, *best_visual;
visuals = gdk_list_visuals ();
tmp_list = visuals;
best_visual = tmp_list->data;
best_score = gdk_rgb_score_visual (best_visual);
tmp_list = tmp_list->next;
while (tmp_list)
{
visual = tmp_list->data;
score = gdk_rgb_score_visual (visual);
if (score > best_score)
{
best_score = score;
best_visual = visual;
}
tmp_list = tmp_list->next;
}
g_list_free (visuals);
return best_visual;
}
static void gdk_rgb_select_conv (GdkRgbInfo *image_info);
static void
gdk_rgb_set_gray_cmap (GdkRgbInfo *image_info,
GdkColormap *cmap)
{
gint i;
GdkColor color;
gint status;
gulong pixels[256];
gint r, g, b, gray;
for (i = 0; i < 256; i++)
{
color.pixel = i;
color.red = i * 257;
color.green = i * 257;
color.blue = i * 257;
status = gdk_colormap_alloc_color (cmap, &color, FALSE, TRUE);
pixels[i] = color.pixel;
#ifdef VERBOSE
g_print ("allocating pixel %d, %x %x %x, result %d\n",
color.pixel, color.red, color.green, color.blue, status);
#endif
}
/* Now, we make fake colorcubes - we ultimately just use the pseudocolor
methods. */
image_info->colorcube = g_new (guchar, 4096);
for (i = 0; i < 4096; i++)
{
r = (i >> 4) & 0xf0;
r = r | r >> 4;
g = i & 0xf0;
g = g | g >> 4;
b = (i << 4 & 0xf0);
b = b | b >> 4;
gray = (g + ((r + b) >> 1)) >> 1;
image_info->colorcube[i] = pixels[gray];
}
}
static void
gdk_rgb_free_info (GdkRgbInfo *image_info)
{
GSList *tmp_list;
if (image_info->stage_buf)
g_free (image_info->stage_buf);
if (image_info->gray_cmap)
gdk_rgb_cmap_free (image_info->gray_cmap);
if (image_info->own_gc)
gdk_gc_unref (image_info->own_gc);
if (image_info->colorcube)
g_free (image_info->colorcube);
if (image_info->colorcube_d)
g_free (image_info->colorcube_d);
tmp_list = image_info->cmap_info_list;
while (tmp_list)
{
GdkRgbCmapInfo *cmap_info = tmp_list->data;
cmap_info->cmap->info_list = g_slist_remove (cmap_info->cmap->info_list, cmap_info);
g_free (cmap_info);
}
g_slist_free (image_info->cmap_info_list);
g_free (image_info);
}
/* Create a GdkRgbInfo for the given visual/colormap pair. If colormap
* is NULL, it will be determined and stored in image_info->cmap.
* In this case, image_info->cmap will have an extra refcount which
* is owned by the caller.
*/
static GdkRgbInfo *
gdk_rgb_create_info (GdkVisual *visual, GdkColormap *colormap)
{
GdkRgbInfo *image_info;
image_info = g_new0 (GdkRgbInfo, 1);
image_info->visual = visual;
image_info->cmap = NULL;
image_info->nred_shades = 6;
image_info->ngreen_shades = 6;
image_info->nblue_shades = 4;
image_info->ngray_shades = 24;
image_info->nreserved = 0;
image_info->bpp = 0;
image_info->cmap_alloced = FALSE;
image_info->gamma = 1.0;
image_info->stage_buf = NULL;
image_info->own_gc = NULL;
image_info->cmap = colormap;
/* We used to use the 2x2x2 color cube for pseudo-color with depths
* 5, 6, 7 as well but now only use it for depths (3 and) 4 in
* pseudo-color. The reason for this is that on Win32 we let the
* user restrict the color allocation for PSEUDO_COLOR visuals
* (i.e., 256-color mode) and we probably want to do the full
* gdk_rgb_do_colormaps() if we are doing that. (Though the color
* sharing code won't really be right.)
*
* (The actual usefulness of this user-requested restriction remains
* to be seen, but the code is there in gdkvisual-win32.c. The
* thought is that it might occasionally be useful to restrict the
* palette size in a GTK application in order to reduce color
* flashing.)
*/
if ((image_info->visual->type == GDK_VISUAL_PSEUDO_COLOR &&
image_info->visual->depth <= 4 &&
image_info->visual->depth >= 3) ||
(image_info->visual->type == GDK_VISUAL_STATIC_COLOR &&
image_info->visual->depth < 8 &&
image_info->visual->depth >= 3))
{
if (!image_info->cmap)
image_info->cmap = gdk_colormap_ref (gdk_colormap_get_system ());
gdk_rgb_colorcube_222 (image_info);
}
else if (image_info->visual->type == GDK_VISUAL_PSEUDO_COLOR)
{
if (!image_info->cmap &&
(gdk_rgb_install_cmap || image_info->visual != gdk_visual_get_system ()))
{
image_info->cmap = gdk_colormap_new (image_info->visual, FALSE);
image_info->cmap_alloced = TRUE;
}
if (!gdk_rgb_do_colormaps (image_info, image_info->cmap != NULL))
{
image_info->cmap = gdk_colormap_new (image_info->visual, FALSE);
image_info->cmap_alloced = TRUE;
gdk_rgb_do_colormaps (image_info, TRUE);
}
if (gdk_rgb_verbose)
g_print ("color cube: %d x %d x %d\n",
image_info->nred_shades,
image_info->ngreen_shades,
image_info->nblue_shades);
if (!image_info->cmap)
image_info->cmap = gdk_colormap_ref (gdk_colormap_get_system ());
}
#ifdef ENABLE_GRAYSCALE
else if (image_info->visual->type == GDK_VISUAL_GRAYSCALE)
{
if (!image_info->cmap)
{
image_info->cmap = gdk_colormap_new (image_info->visual, FALSE);
image_info->cmap_alloced = TRUE;
}
gdk_rgb_set_gray_cmap (image_info, image_info->cmap);
}
#endif
else
{
if (!image_info->cmap)
{
/* Always install colormap in direct color. */
if (image_info->visual->type != GDK_VISUAL_DIRECT_COLOR &&
image_info->visual == gdk_visual_get_system ())
image_info->cmap = gdk_colormap_ref (gdk_colormap_get_system ());
else
{
image_info->cmap = gdk_colormap_new (image_info->visual, FALSE);
image_info->cmap_alloced = TRUE;
}
}
}
image_info->bitmap = (image_info->visual->depth == 1);
image_info->bpp = (_gdk_windowing_get_bits_for_depth (image_info->visual->depth) + 7) / 8;
gdk_rgb_select_conv (image_info);
if (!gdk_rgb_quark)
gdk_rgb_quark = g_quark_from_static_string (gdk_rgb_key);
g_object_set_qdata_full (G_OBJECT (image_info->cmap), gdk_rgb_quark,
image_info, (GDestroyNotify)gdk_rgb_free_info);
return image_info;
}
void
gdk_rgb_init (void)
{
static const gint byte_order[1] = { 1 };
if (_gdk_debug_flags & GDK_DEBUG_GDKRGB)
gdk_rgb_verbose = TRUE;
/* check endian sanity */
#if G_BYTE_ORDER == G_BIG_ENDIAN
if (((char *)byte_order)[0] == 1)
g_error ("gdk_rgb_init: compiled for big endian, but this is a little endian machine.\n\n");
#else
if (((char *)byte_order)[0] != 1)
g_error ("gdk_rgb_init: compiled for little endian, but this is a big endian machine.\n\n");
#endif
}
static GdkRgbInfo *
gdk_rgb_get_info_from_colormap (GdkColormap *cmap)
{
GdkRgbInfo *image_info;
if (!gdk_rgb_quark)
gdk_rgb_quark = g_quark_from_static_string (gdk_rgb_key);
image_info = g_object_get_qdata (G_OBJECT (cmap), gdk_rgb_quark);
if (!image_info)
image_info = gdk_rgb_create_info (gdk_colormap_get_visual (cmap), cmap);
return image_info;
}
static gulong
gdk_rgb_xpixel_from_rgb_internal (GdkColormap *colormap,
guint16 r, guint16 g, guint16 b)
{
gulong pixel = 0;
GdkRgbInfo *image_info = gdk_rgb_get_info_from_colormap (colormap);
if (image_info->bitmap)
{
return (r + (g << 1) + b) > 131070;
}
else if (image_info->visual->type == GDK_VISUAL_PSEUDO_COLOR)
pixel = image_info->colorcube[((r & 0xf000) >> 4) |
((g & 0xf000) >> 8) |
((b & 0xf000) >> 12)];
else if (image_info->visual->depth < 8 &&
image_info->visual->type == GDK_VISUAL_STATIC_COLOR)
{
pixel = image_info->colorcube_d[((r & 0x8000) >> 9) |
((g & 0x8000) >> 12) |
((b & 0x8000) >> 15)];
}
else if (image_info->visual->type == GDK_VISUAL_TRUE_COLOR ||
image_info->visual->type == GDK_VISUAL_DIRECT_COLOR)
{
#ifdef VERBOSE
g_print ("shift, prec: r %d %d g %d %d b %d %d\n",
image_info->visual->red_shift,
image_info->visual->red_prec,
image_info->visual->green_shift,
image_info->visual->green_prec,
image_info->visual->blue_shift,
image_info->visual->blue_prec);
#endif
pixel = (((r >> (16 - image_info->visual->red_prec)) << image_info->visual->red_shift) +
((g >> (16 - image_info->visual->green_prec)) << image_info->visual->green_shift) +
((b >> (16 - image_info->visual->blue_prec)) << image_info->visual->blue_shift));
}
else if (image_info->visual->type == GDK_VISUAL_STATIC_GRAY ||
image_info->visual->type == GDK_VISUAL_GRAYSCALE)
{
int gray = r + g * 2 + b;
return gray >> (18 - image_info->visual->depth);
}
return pixel;
}
/* convert an rgb value into an X pixel code */
gulong
gdk_rgb_xpixel_from_rgb (guint32 rgb)
{
guint32 r = rgb & 0xff0000;
guint32 g = rgb & 0xff00;
guint32 b = rgb & 0xff;
return gdk_rgb_xpixel_from_rgb_internal (gdk_rgb_get_colormap(),
(r >> 8) + (r >> 16), g + (g >> 8), b + (b << 8));
}
void
gdk_rgb_gc_set_foreground (GdkGC *gc, guint32 rgb)
{
GdkColor color;
color.pixel = gdk_rgb_xpixel_from_rgb (rgb);
gdk_gc_set_foreground (gc, &color);
}
void
gdk_rgb_gc_set_background (GdkGC *gc, guint32 rgb)
{
GdkColor color;
color.pixel = gdk_rgb_xpixel_from_rgb (rgb);
gdk_gc_set_background (gc, &color);
}
/**
* gdk_rgb_find_color:
* @colormap: a #GdkColormap
* @color: a #GdkColor
*
* @colormap should be the colormap for the graphics context and
* drawable you're using to draw. If you're drawing to a #GtkWidget,
* call gtk_widget_get_colormap().
*
* @color should have its %red, %green, and %blue fields initialized;
* gdk_rgb_find_color() will fill in the %pixel field with the best
* matching pixel from a color cube. The color is then ready to be
* used for drawing, e.g. you can call gdk_gc_set_foreground() which
* expects %pixel to be initialized.
*
* In many cases, you can avoid this whole issue by calling
* gdk_gc_set_rgb_fg_color() or gdk_gc_set_rgb_bg_color(), which
* do not expect %pixel to be initialized in advance. If you use those
* functions, there's no need for gdk_rgb_find_color().
*
**/
void
gdk_rgb_find_color (GdkColormap *colormap, GdkColor *color)
{
color->pixel = gdk_rgb_xpixel_from_rgb_internal (colormap,
color->red, color->green, color->blue);
}
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
#define HAIRY_CONVERT_8
#endif
#ifdef HAIRY_CONVERT_8
static void
gdk_rgb_convert_8 (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
gint bpl;
guchar *obuf, *obptr;
guchar *bptr, *bp2;
gint r, g, b;
guchar *colorcube = image_info->colorcube;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0;
for (y = 0; y < height; y++)
{
bp2 = bptr;
obptr = obuf;
if (((unsigned long)obuf | (unsigned long) bp2) & 3)
{
for (x = 0; x < width; x++)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
obptr[0] = colorcube[((r & 0xf0) << 4) |
(g & 0xf0) |
(b >> 4)];
obptr++;
}
}
else
{
for (x = 0; x < width - 3; x += 4)
{
guint32 r1b0g0r0;
guint32 g2r2b1g1;
guint32 b3g3r3b2;
r1b0g0r0 = ((guint32 *)bp2)[0];
g2r2b1g1 = ((guint32 *)bp2)[1];
b3g3r3b2 = ((guint32 *)bp2)[2];
((guint32 *)obptr)[0] =
colorcube[((r1b0g0r0 & 0xf0) << 4) |
((r1b0g0r0 & 0xf000) >> 8) |
((r1b0g0r0 & 0xf00000) >> 20)] |
(colorcube[((r1b0g0r0 & 0xf0000000) >> 20) |
(g2r2b1g1 & 0xf0) |
((g2r2b1g1 & 0xf000) >> 12)] << 8) |
(colorcube[((g2r2b1g1 & 0xf00000) >> 12) |
((g2r2b1g1 & 0xf0000000) >> 24) |
((b3g3r3b2 & 0xf0) >> 4)] << 16) |
(colorcube[((b3g3r3b2 & 0xf000) >> 4) |
((b3g3r3b2 & 0xf00000) >> 16) |
(b3g3r3b2 >> 28)] << 24);
bp2 += 12;
obptr += 4;
}
for (; x < width; x++)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
obptr[0] = colorcube[((r & 0xf0) << 4) |
(g & 0xf0) |
(b >> 4)];
obptr++;
}
}
bptr += rowstride;
obuf += bpl;
}
}
#else
static void
gdk_rgb_convert_8 (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
gint bpl;
guchar *obuf, *obptr;
guchar *bptr, *bp2;
gint r, g, b;
guchar *colorcube = image_info->colorcube;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0;
for (y = 0; y < height; y++)
{
bp2 = bptr;
obptr = obuf;
for (x = 0; x < width; x++)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
obptr[0] = colorcube[((r & 0xf0) << 4) |
(g & 0xf0) |
(b >> 4)];
obptr++;
}
bptr += rowstride;
obuf += bpl;
}
}
#endif
#if 1
/* This dither table was generated by Raph Levien using patented
technology (US Patent 5,276,535). The dither table itself is in the
public domain. */
#define DM_WIDTH 128
#define DM_WIDTH_SHIFT 7
#define DM_HEIGHT 128
static const guchar DM[128][128] =
{
{ 0, 41, 23, 5, 17, 39, 7, 15, 62, 23, 40, 51, 31, 47, 9, 32, 52, 27, 57, 25, 6, 61, 27, 52, 37, 7, 40, 63, 18, 36, 10, 42, 25, 62, 45, 34, 20, 42, 37, 14, 35, 29, 50, 10, 61, 2, 40, 8, 37, 12, 58, 22, 5, 41, 10, 39, 0, 60, 11, 46, 2, 55, 38, 17, 36, 59, 13, 54, 37, 56, 8, 29, 16, 13, 63, 22, 41, 55, 7, 20, 49, 14, 23, 55, 37, 23, 19, 36, 15, 49, 23, 63, 30, 14, 38, 27, 53, 13, 22, 41, 19, 31, 7, 19, 50, 30, 49, 16, 3, 32, 56, 40, 29, 34, 8, 48, 19, 45, 4, 51, 12, 46, 35, 49, 16, 42, 12, 62 },
{ 30, 57, 36, 54, 47, 34, 52, 27, 43, 4, 28, 7, 17, 36, 62, 13, 44, 7, 18, 48, 33, 21, 44, 14, 30, 47, 12, 33, 5, 55, 31, 58, 13, 30, 4, 17, 52, 10, 60, 26, 46, 0, 39, 27, 42, 22, 47, 25, 60, 32, 9, 38, 48, 17, 59, 30, 49, 18, 34, 25, 51, 19, 5, 48, 21, 8, 28, 46, 1, 32, 41, 19, 54, 47, 37, 18, 28, 11, 44, 30, 39, 56, 2, 33, 8, 42, 61, 28, 58, 8, 46, 9, 41, 4, 58, 7, 21, 48, 59, 10, 52, 14, 42, 57, 12, 25, 7, 53, 42, 24, 11, 50, 17, 59, 42, 2, 36, 60, 32, 17, 63, 29, 21, 7, 59, 32, 24, 39 },
{ 22, 8, 16, 32, 3, 25, 13, 57, 18, 45, 58, 39, 55, 20, 5, 42, 23, 34, 63, 1, 51, 10, 58, 4, 60, 23, 53, 27, 44, 21, 3, 48, 8, 50, 43, 54, 27, 32, 5, 55, 21, 58, 12, 53, 6, 36, 14, 50, 17, 29, 53, 15, 24, 52, 7, 36, 13, 42, 4, 53, 9, 35, 61, 26, 56, 32, 49, 15, 62, 23, 6, 60, 2, 31, 4, 48, 58, 38, 15, 61, 5, 25, 47, 28, 50, 15, 7, 40, 3, 32, 33, 52, 25, 50, 35, 42, 61, 3, 28, 36, 23, 63, 4, 33, 46, 62, 36, 23, 60, 6, 54, 28, 4, 37, 23, 55, 25, 8, 42, 54, 14, 6, 56, 38, 19, 52, 4, 46 },
{ 48, 53, 43, 12, 45, 63, 30, 37, 9, 34, 21, 1, 25, 47, 29, 58, 3, 54, 15, 39, 29, 17, 38, 35, 20, 43, 1, 49, 15, 59, 29, 39, 22, 35, 16, 23, 1, 47, 39, 18, 8, 44, 25, 31, 57, 19, 63, 4, 45, 3, 42, 61, 1, 31, 45, 20, 57, 29, 62, 21, 32, 41, 14, 44, 3, 39, 5, 34, 10, 43, 51, 35, 23, 52, 40, 10, 21, 1, 53, 18, 51, 43, 12, 62, 18, 54, 26, 51, 20, 57, 14, 1, 62, 16, 11, 18, 32, 39, 17, 44, 1, 48, 26, 37, 18, 2, 51, 14, 28, 45, 35, 18, 57, 13, 47, 11, 51, 20, 2, 39, 31, 47, 25, 1, 50, 11, 60, 7 },
{ 18, 28, 1, 56, 21, 10, 51, 2, 46, 54, 14, 61, 11, 50, 13, 38, 19, 31, 45, 9, 55, 24, 47, 5, 54, 9, 62, 11, 35, 8, 51, 14, 57, 6, 63, 40, 58, 14, 51, 28, 62, 34, 15, 48, 1, 41, 30, 35, 55, 21, 34, 11, 49, 37, 8, 52, 4, 23, 15, 43, 1, 58, 11, 23, 53, 16, 55, 26, 58, 18, 27, 12, 45, 14, 25, 63, 42, 33, 27, 35, 9, 31, 21, 38, 1, 44, 34, 12, 48, 38, 21, 44, 29, 47, 26, 53, 1, 46, 54, 8, 59, 29, 11, 55, 22, 41, 33, 20, 39, 1, 48, 9, 44, 32, 5, 62, 29, 44, 57, 23, 10, 58, 34, 43, 15, 37, 26, 33 },
{ 51, 38, 59, 24, 35, 42, 19, 60, 5, 32, 41, 26, 43, 33, 7, 53, 48, 11, 59, 23, 42, 2, 61, 30, 16, 40, 32, 24, 56, 41, 19, 33, 37, 26, 47, 9, 31, 22, 2, 45, 9, 54, 4, 37, 21, 52, 11, 23, 7, 57, 16, 25, 55, 18, 63, 27, 46, 39, 56, 10, 50, 37, 29, 47, 19, 63, 24, 9, 46, 2, 39, 60, 9, 57, 30, 7, 49, 11, 59, 3, 45, 57, 5, 60, 29, 22, 5, 60, 30, 9, 59, 18, 40, 6, 57, 36, 30, 12, 24, 34, 15, 40, 52, 6, 49, 9, 58, 4, 63, 12, 26, 61, 22, 53, 38, 16, 35, 14, 28, 50, 42, 17, 5, 28, 62, 20, 54, 12 },
{ 26, 6, 31, 15, 49, 6, 38, 27, 22, 49, 16, 56, 2, 62, 30, 21, 0, 36, 28, 6, 49, 32, 13, 52, 26, 50, 19, 46, 3, 26, 62, 0, 53, 12, 29, 3, 53, 41, 60, 24, 38, 13, 58, 16, 43, 9, 59, 39, 46, 28, 44, 40, 2, 33, 13, 41, 16, 6, 47, 31, 26, 17, 57, 6, 38, 0, 42, 36, 29, 52, 20, 31, 48, 0, 34, 56, 20, 36, 23, 54, 14, 41, 24, 37, 10, 55, 46, 25, 16, 45, 36, 4, 55, 23, 15, 8, 50, 62, 5, 56, 44, 20, 13, 28, 59, 31, 24, 47, 31, 52, 37, 17, 40, 0, 26, 49, 3, 60, 7, 33, 0, 61, 53, 40, 8, 45, 2, 41 },
{ 16, 63, 43, 4, 61, 24, 56, 13, 53, 8, 36, 12, 24, 41, 16, 46, 60, 26, 52, 39, 14, 57, 21, 37, 0, 45, 7, 59, 38, 17, 43, 10, 45, 20, 61, 43, 19, 11, 33, 17, 50, 32, 23, 61, 28, 49, 26, 0, 18, 51, 5, 60, 22, 58, 29, 0, 59, 34, 19, 62, 3, 52, 7, 44, 30, 59, 13, 50, 15, 62, 7, 17, 38, 22, 44, 15, 40, 4, 47, 28, 33, 17, 49, 16, 51, 40, 10, 56, 0, 53, 13, 49, 28, 38, 60, 21, 43, 19, 37, 27, 3, 51, 34, 39, 0, 45, 15, 43, 10, 21, 3, 55, 8, 33, 59, 10, 41, 18, 52, 24, 46, 20, 30, 13, 58, 22, 36, 57 },
{ 50, 34, 11, 47, 29, 17, 44, 0, 33, 63, 28, 46, 52, 5, 57, 10, 42, 18, 4, 63, 20, 8, 44, 10, 56, 34, 14, 29, 5, 54, 23, 59, 32, 49, 7, 34, 49, 27, 56, 0, 42, 7, 46, 3, 40, 6, 54, 32, 62, 13, 36, 10, 47, 8, 35, 49, 24, 51, 12, 40, 22, 35, 60, 12, 22, 51, 33, 4, 40, 25, 43, 55, 5, 54, 12, 61, 26, 51, 8, 62, 0, 53, 7, 63, 2, 32, 19, 34, 42, 24, 31, 63, 2, 10, 45, 33, 0, 48, 9, 61, 22, 47, 8, 62, 18, 56, 7, 54, 27, 57, 46, 30, 50, 19, 45, 30, 56, 36, 22, 47, 11, 38, 3, 51, 32, 48, 18, 9 },
{ 0, 21, 40, 19, 52, 9, 37, 48, 20, 40, 3, 18, 27, 38, 35, 22, 31, 56, 13, 35, 46, 28, 60, 40, 27, 18, 61, 50, 41, 30, 7, 36, 2, 25, 16, 57, 5, 15, 47, 29, 55, 19, 30, 52, 15, 34, 20, 12, 43, 30, 20, 54, 25, 44, 53, 12, 38, 5, 55, 27, 48, 15, 33, 27, 45, 8, 19, 28, 56, 11, 33, 49, 18, 36, 29, 2, 45, 16, 39, 19, 31, 43, 27, 35, 20, 52, 26, 6, 61, 11, 41, 17, 29, 51, 20, 56, 25, 32, 41, 17, 53, 31, 25, 14, 42, 23, 35, 16, 38, 6, 34, 12, 15, 62, 6, 21, 13, 1, 63, 9, 55, 27, 43, 25, 14, 4, 31, 55 },
{ 44, 29, 61, 2, 35, 58, 26, 15, 60, 10, 51, 59, 14, 55, 8, 50, 2, 44, 25, 51, 1, 33, 16, 4, 48, 36, 2, 21, 12, 57, 48, 13, 51, 55, 40, 28, 37, 62, 8, 39, 12, 63, 36, 10, 59, 24, 56, 47, 9, 50, 41, 1, 32, 17, 6, 21, 61, 30, 9, 43, 1, 54, 41, 2, 54, 37, 48, 61, 1, 46, 21, 3, 58, 24, 50, 32, 60, 10, 57, 25, 46, 12, 59, 4, 45, 13, 57, 47, 27, 39, 5, 58, 47, 14, 35, 4, 52, 13, 60, 6, 36, 10, 45, 55, 4, 50, 29, 2, 61, 50, 25, 58, 44, 24, 36, 42, 54, 28, 40, 32, 16, 56, 6, 62, 46, 39, 60, 23 },
{ 7, 48, 14, 54, 23, 40, 4, 45, 30, 22, 42, 32, 1, 44, 20, 29, 58, 8, 37, 19, 41, 54, 24, 58, 9, 53, 25, 46, 34, 16, 23, 38, 27, 11, 18, 1, 52, 21, 35, 22, 48, 5, 25, 45, 18, 38, 2, 27, 35, 4, 57, 15, 62, 39, 57, 28, 42, 16, 36, 60, 24, 18, 10, 63, 20, 5, 16, 23, 37, 14, 59, 27, 41, 8, 13, 42, 21, 35, 6, 50, 3, 38, 15, 48, 30, 39, 17, 3, 49, 14, 53, 33, 24, 7, 61, 44, 11, 39, 23, 49, 19, 58, 1, 32, 36, 12, 60, 41, 20, 13, 41, 4, 39, 1, 48, 8, 18, 51, 14, 44, 5, 37, 21, 34, 1, 26, 10, 37 },
{ 53, 36, 27, 9, 50, 12, 32, 55, 2, 57, 7, 17, 48, 34, 63, 15, 40, 26, 62, 11, 49, 6, 31, 39, 22, 42, 6, 63, 1, 39, 60, 4, 42, 61, 32, 45, 24, 44, 2, 60, 16, 41, 53, 1, 33, 61, 49, 17, 63, 23, 45, 26, 33, 3, 23, 46, 2, 50, 20, 4, 45, 34, 49, 30, 39, 58, 44, 31, 53, 34, 6, 52, 30, 47, 63, 1, 53, 22, 42, 31, 58, 23, 54, 22, 61, 8, 36, 59, 22, 35, 21, 1, 55, 40, 27, 16, 30, 54, 2, 29, 43, 16, 39, 63, 21, 46, 26, 10, 48, 32, 19, 53, 30, 56, 26, 60, 33, 4, 61, 23, 49, 59, 15, 53, 19, 58, 42, 16 },
{ 20, 5, 59, 46, 25, 62, 7, 19, 43, 25, 37, 61, 11, 24, 4, 54, 12, 52, 3, 32, 17, 61, 12, 47, 15, 55, 18, 31, 53, 28, 9, 50, 21, 6, 55, 9, 58, 14, 54, 26, 33, 7, 31, 58, 13, 21, 8, 42, 29, 6, 37, 11, 48, 52, 14, 60, 11, 39, 56, 32, 14, 58, 7, 26, 17, 4, 42, 8, 11, 47, 19, 38, 10, 17, 26, 37, 9, 55, 28, 13, 18, 40, 6, 33, 1, 43, 25, 11, 51, 7, 62, 43, 18, 37, 3, 57, 45, 9, 38, 58, 5, 52, 27, 7, 17, 53, 5, 57, 37, 2, 63, 9, 22, 15, 11, 38, 25, 45, 35, 0, 28, 10, 41, 30, 50, 8, 31, 57 },
{ 49, 33, 16, 38, 1, 42, 51, 34, 53, 14, 28, 49, 30, 56, 36, 23, 43, 20, 38, 56, 22, 45, 28, 0, 62, 35, 26, 44, 11, 19, 52, 35, 44, 15, 30, 38, 10, 31, 40, 4, 46, 50, 20, 40, 27, 44, 51, 14, 56, 53, 19, 59, 7, 29, 41, 19, 35, 25, 8, 52, 22, 44, 13, 53, 50, 32, 61, 24, 56, 25, 63, 0, 45, 57, 33, 59, 16, 46, 4, 62, 50, 11, 60, 37, 52, 19, 55, 29, 37, 46, 13, 26, 48, 10, 50, 34, 21, 63, 26, 13, 42, 33, 22, 55, 35, 28, 43, 15, 24, 51, 27, 34, 46, 49, 58, 3, 52, 9, 57, 19, 48, 55, 3, 35, 12, 45, 24, 3 },
{ 41, 11, 56, 28, 18, 31, 22, 10, 37, 6, 47, 13, 3, 41, 9, 46, 0, 48, 29, 6, 34, 10, 55, 37, 20, 8, 49, 3, 41, 59, 14, 25, 0, 63, 19, 47, 27, 51, 17, 57, 23, 10, 61, 6, 54, 3, 38, 31, 0, 22, 34, 43, 20, 55, 31, 0, 49, 63, 29, 38, 3, 62, 28, 40, 0, 22, 14, 35, 2, 48, 15, 43, 23, 14, 3, 29, 49, 20, 39, 34, 0, 44, 29, 9, 15, 47, 5, 42, 0, 31, 58, 5, 31, 61, 23, 15, 0, 47, 19, 50, 24, 3, 59, 11, 44, 0, 31, 59, 6, 42, 17, 60, 0, 39, 20, 31, 43, 17, 29, 40, 12, 25, 60, 22, 52, 15, 63, 29 },
{ 20, 52, 8, 44, 62, 4, 59, 49, 17, 63, 21, 39, 60, 18, 52, 27, 33, 59, 14, 51, 59, 43, 24, 5, 51, 30, 57, 17, 32, 5, 37, 56, 48, 34, 42, 3, 60, 5, 36, 13, 43, 37, 18, 34, 25, 12, 59, 24, 47, 36, 11, 50, 3, 38, 9, 58, 16, 5, 43, 18, 47, 10, 37, 18, 59, 46, 29, 52, 40, 12, 34, 28, 56, 36, 53, 7, 43, 8, 24, 52, 26, 17, 56, 43, 24, 32, 63, 20, 57, 16, 22, 52, 36, 8, 41, 56, 29, 32, 54, 7, 35, 57, 14, 48, 20, 62, 13, 39, 53, 29, 8, 45, 13, 29, 7, 61, 14, 54, 6, 63, 38, 32, 18, 43, 2, 39, 6, 47 },
{ 0, 58, 23, 35, 13, 46, 12, 39, 0, 31, 55, 24, 5, 35, 15, 61, 17, 5, 39, 25, 18, 2, 50, 33, 41, 13, 39, 23, 62, 46, 29, 12, 22, 8, 56, 25, 20, 49, 32, 62, 0, 56, 11, 46, 63, 42, 9, 16, 55, 5, 60, 15, 62, 26, 45, 21, 36, 51, 13, 57, 31, 24, 55, 6, 35, 9, 57, 5, 20, 60, 7, 51, 5, 19, 40, 25, 61, 32, 56, 12, 36, 48, 21, 2, 58, 12, 39, 28, 9, 50, 40, 12, 44, 18, 25, 49, 6, 38, 11, 62, 18, 46, 30, 9, 40, 25, 49, 19, 10, 36, 55, 22, 33, 52, 41, 18, 37, 27, 49, 21, 2, 46, 7, 53, 33, 61, 27, 35 },
{ 41, 31, 5, 39, 51, 26, 33, 57, 27, 41, 9, 44, 54, 29, 48, 7, 44, 36, 57, 10, 31, 63, 16, 45, 11, 60, 1, 47, 7, 20, 43, 3, 58, 36, 13, 52, 39, 7, 15, 28, 22, 48, 30, 21, 1, 29, 49, 44, 27, 17, 40, 30, 24, 42, 12, 53, 33, 7, 47, 20, 1, 42, 11, 49, 25, 43, 17, 32, 45, 27, 41, 21, 31, 62, 11, 49, 2, 15, 42, 5, 63, 7, 41, 27, 49, 6, 54, 23, 46, 34, 2, 28, 54, 3, 59, 12, 46, 17, 42, 28, 40, 1, 37, 51, 5, 55, 2, 34, 47, 16, 3, 62, 47, 5, 23, 56, 1, 44, 12, 34, 51, 16, 57, 11, 25, 17, 54, 13 },
{ 60, 26, 55, 18, 3, 60, 20, 6, 52, 15, 50, 19, 32, 11, 23, 53, 26, 21, 1, 47, 42, 27, 8, 58, 21, 27, 53, 36, 26, 54, 31, 50, 17, 30, 45, 1, 29, 59, 44, 53, 41, 4, 35, 58, 51, 19, 32, 4, 52, 34, 48, 8, 51, 5, 56, 2, 25, 61, 27, 38, 54, 27, 62, 21, 51, 1, 39, 62, 10, 50, 1, 58, 13, 47, 38, 18, 35, 54, 22, 51, 30, 19, 59, 34, 14, 32, 44, 4, 60, 15, 52, 62, 20, 43, 30, 35, 21, 60, 4, 52, 12, 24, 61, 18, 30, 42, 23, 61, 25, 50, 27, 38, 11, 59, 12, 35, 50, 30, 59, 24, 8, 42, 28, 37, 48, 9, 44, 21 },
{ 10, 47, 15, 50, 30, 43, 8, 45, 29, 2, 36, 59, 1, 58, 41, 3, 63, 31, 54, 20, 13, 55, 35, 38, 4, 44, 15, 9, 61, 2, 14, 38, 61, 10, 23, 54, 18, 12, 24, 2, 14, 55, 16, 8, 38, 14, 41, 60, 10, 23, 1, 58, 32, 17, 28, 37, 41, 15, 3, 60, 15, 33, 4, 36, 16, 59, 28, 14, 23, 55, 37, 18, 44, 28, 2, 57, 30, 10, 27, 46, 14, 38, 3, 53, 21, 61, 17, 35, 10, 41, 26, 7, 33, 9, 57, 1, 53, 37, 26, 20, 56, 48, 9, 33, 58, 16, 37, 7, 45, 1, 57, 15, 32, 26, 42, 23, 7, 20, 4, 54, 31, 62, 22, 1, 59, 30, 4, 51 },
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{ 56, 33, 58, 32, 19, 35, 42, 6, 59, 11, 38, 5, 49, 12, 62, 7, 52, 17, 5, 25, 54, 20, 61, 31, 54, 27, 41, 11, 44, 5, 59, 12, 36, 51, 10, 61, 28, 41, 48, 9, 43, 63, 5, 40, 20, 8, 49, 26, 34, 21, 58, 1, 18, 45, 7, 39, 61, 26, 8, 50, 23, 10, 63, 5, 55, 37, 19, 49, 52, 15, 59, 47, 13, 54, 1, 25, 42, 58, 10, 48, 3, 27, 50, 1, 17, 48, 34, 41, 16, 40, 2, 45, 10, 39, 17, 61, 5, 38, 19, 9, 41, 31, 60, 38, 5, 23, 36, 8, 30, 55, 24, 63, 12, 48, 14, 51, 31, 20, 45, 25, 12, 50, 32, 2, 28, 11, 62, 14 },
{ 44, 16, 7, 48, 1, 62, 16, 50, 27, 33, 61, 25, 17, 44, 31, 14, 22, 43, 32, 48, 18, 40, 8, 36, 3, 16, 33, 62, 23, 38, 25, 53, 2, 21, 41, 6, 22, 15, 59, 29, 16, 37, 26, 15, 52, 42, 23, 15, 54, 39, 10, 30, 53, 11, 49, 24, 2, 43, 55, 17, 34, 44, 15, 31, 24, 44, 2, 32, 7, 35, 25, 5, 40, 45, 29, 51, 6, 21, 37, 52, 24, 60, 13, 31, 53, 23, 2, 28, 49, 24, 31, 60, 20, 51, 1, 34, 48, 14, 59, 33, 50, 1, 18, 33, 48, 60, 17, 51, 39, 6, 38, 2, 35, 29, 40, 23, 1, 62, 15, 53, 37, 17, 46, 57, 40, 51, 24, 22 },
{ 5, 37, 52, 24, 45, 13, 40, 3, 45, 9, 19, 42, 56, 4, 37, 46, 56, 2, 63, 11, 51, 1, 49, 13, 59, 45, 39, 1, 48, 15, 58, 9, 46, 31, 54, 35, 57, 38, 3, 46, 56, 4, 47, 57, 1, 30, 38, 63, 3, 46, 28, 63, 41, 14, 33, 62, 19, 32, 13, 28, 61, 1, 53, 42, 11, 60, 22, 62, 27, 42, 61, 31, 19, 8, 61, 12, 32, 55, 2, 18, 33, 12, 43, 36, 9, 62, 30, 55, 6, 58, 35, 7, 43, 29, 54, 23, 43, 30, 3, 25, 11, 45, 52, 28, 7, 14, 42, 1, 22, 50, 16, 53, 19, 59, 4, 46, 33, 41, 4, 35, 58, 5, 26, 13, 20, 2, 34, 54 },
{ 30, 63, 21, 10, 26, 55, 29, 59, 23, 39, 53, 1, 36, 24, 59, 27, 10, 34, 23, 38, 30, 60, 22, 42, 28, 19, 9, 57, 30, 19, 43, 33, 13, 63, 3, 19, 11, 50, 31, 20, 14, 34, 10, 35, 17, 59, 7, 31, 19, 25, 50, 5, 20, 57, 29, 6, 52, 41, 4, 46, 20, 37, 26, 17, 49, 6, 39, 18, 53, 14, 3, 49, 57, 23, 34, 48, 14, 41, 28, 38, 56, 6, 58, 25, 39, 19, 43, 15, 37, 11, 47, 18, 53, 4, 37, 9, 62, 21, 53, 40, 57, 24, 13, 40, 56, 26, 47, 31, 59, 25, 45, 27, 10, 43, 21, 61, 13, 27, 48, 9, 23, 43, 31, 62, 38, 59, 9, 47 },
{ 25, 4, 40, 60, 34, 6, 18, 36, 8, 57, 12, 30, 49, 14, 6, 54, 41, 16, 50, 6, 43, 15, 34, 4, 53, 24, 50, 35, 4, 51, 7, 55, 28, 24, 39, 44, 60, 7, 25, 62, 42, 53, 24, 61, 28, 45, 52, 12, 48, 37, 9, 35, 43, 3, 37, 48, 12, 58, 30, 52, 9, 59, 6, 57, 33, 29, 48, 4, 37, 45, 20, 34, 10, 39, 0, 60, 22, 45, 8, 63, 21, 42, 14, 49, 3, 56, 11, 46, 21, 61, 0, 42, 25, 13, 63, 17, 36, 8, 46, 16, 6, 35, 63, 0, 21, 37, 4, 57, 9, 34, 5, 61, 48, 32, 8, 37, 54, 17, 56, 30, 60, 0, 50, 16, 7, 29, 42, 17 },
{ 32, 50, 15, 48, 2, 43, 52, 25, 47, 16, 32, 63, 21, 52, 40, 19, 0, 61, 29, 58, 20, 56, 26, 46, 12, 55, 6, 22, 62, 32, 17, 40, 0, 49, 34, 8, 27, 32, 48, 0, 21, 39, 5, 44, 12, 6, 22, 40, 0, 57, 16, 60, 23, 17, 54, 22, 36, 15, 24, 39, 19, 34, 47, 23, 0, 54, 13, 51, 24, 9, 55, 16, 52, 27, 44, 20, 4, 54, 26, 49, 0, 30, 46, 16, 29, 51, 34, 4, 52, 28, 33, 15, 57, 39, 26, 49, 0, 56, 27, 31, 48, 20, 43, 29, 53, 11, 46, 19, 41, 13, 55, 18, 0, 57, 26, 51, 2, 44, 6, 38, 14, 40, 22, 45, 36, 53, 3, 57 },
{ 44, 12, 37, 28, 22, 57, 11, 38, 0, 51, 9, 41, 4, 29, 11, 47, 33, 45, 12, 26, 3, 36, 9, 63, 31, 16, 38, 44, 14, 47, 25, 61, 20, 58, 15, 47, 17, 57, 13, 36, 9, 51, 18, 29, 50, 36, 54, 20, 61, 27, 32, 13, 53, 44, 9, 27, 0, 63, 45, 2, 56, 10, 14, 43, 41, 28, 58, 11, 35, 60, 30, 41, 6, 63, 11, 51, 37, 32, 15, 10, 35, 53, 5, 61, 22, 7, 26, 59, 23, 9, 44, 48, 21, 3, 51, 32, 24, 41, 12, 61, 2, 55, 9, 15, 35, 58, 28, 15, 62, 30, 37, 23, 42, 29, 11, 17, 35, 24, 63, 20, 52, 28, 8, 55, 11, 23, 47, 19 },
{ 0, 56, 8, 53, 14, 31, 61, 20, 55, 28, 62, 18, 35, 60, 25, 57, 7, 23, 39, 54, 47, 17, 43, 0, 40, 59, 29, 2, 56, 10, 37, 5, 43, 11, 29, 52, 1, 23, 54, 41, 59, 30, 55, 1, 62, 15, 33, 4, 43, 10, 47, 39, 1, 31, 40, 60, 49, 33, 7, 55, 26, 50, 31, 61, 8, 18, 21, 32, 44, 1, 25, 47, 18, 36, 30, 23, 59, 7, 40, 59, 27, 19, 38, 32, 44, 54, 40, 17, 38, 60, 27, 6, 35, 55, 10, 14, 44, 5, 50, 17, 38, 26, 42, 50, 18, 3, 44, 52, 2, 49, 7, 52, 15, 46, 62, 39, 55, 10, 31, 48, 3, 58, 33, 18, 61, 34, 13, 59 },
{ 39, 27, 63, 20, 35, 41, 4, 45, 26, 5, 38, 13, 44, 2, 50, 17, 37, 52, 2, 13, 28, 58, 24, 51, 21, 8, 34, 48, 27, 42, 18, 51, 31, 56, 5, 36, 38, 44, 4, 17, 26, 11, 38, 23, 42, 8, 56, 39, 24, 51, 5, 56, 21, 59, 14, 6, 18, 42, 22, 35, 16, 37, 3, 25, 39, 46, 63, 5, 50, 17, 58, 8, 55, 3, 50, 12, 43, 17, 47, 2, 51, 9, 62, 12, 1, 35, 13, 50, 1, 37, 12, 51, 19, 29, 46, 59, 22, 58, 33, 45, 22, 60, 10, 32, 61, 39, 8, 33, 25, 36, 20, 60, 38, 4, 21, 5, 28, 45, 12, 18, 42, 11, 49, 1, 27, 40, 6, 30 },
{ 24, 16, 42, 1, 50, 10, 48, 17, 33, 43, 24, 48, 21, 55, 31, 42, 10, 21, 63, 35, 49, 6, 33, 13, 41, 53, 10, 20, 60, 6, 53, 26, 12, 41, 22, 60, 14, 28, 63, 33, 49, 3, 45, 16, 48, 26, 14, 46, 18, 30, 35, 26, 8, 50, 29, 51, 25, 57, 12, 47, 53, 9, 62, 20, 54, 2, 36, 15, 40, 28, 33, 13, 38, 24, 46, 1, 29, 56, 33, 20, 44, 24, 41, 26, 57, 20, 63, 8, 30, 55, 5, 41, 62, 8, 34, 2, 37, 10, 19, 6, 37, 1, 53, 23, 5, 27, 58, 22, 43, 12, 50, 26, 9, 34, 54, 32, 49, 1, 59, 37, 22, 46, 25, 36, 51, 15, 54, 46 },
{ 52, 7, 45, 33, 26, 58, 14, 60, 7, 54, 3, 58, 8, 34, 14, 5, 59, 30, 18, 44, 8, 22, 48, 62, 3, 26, 55, 38, 23, 16, 39, 1, 62, 24, 49, 9, 53, 19, 46, 7, 19, 60, 31, 58, 2, 34, 53, 7, 59, 2, 62, 42, 46, 19, 36, 11, 44, 4, 38, 28, 1, 43, 32, 51, 12, 29, 56, 22, 52, 2, 62, 49, 22, 60, 14, 35, 63, 5, 25, 57, 14, 53, 4, 46, 18, 31, 42, 22, 47, 20, 58, 31, 16, 43, 23, 54, 30, 42, 52, 57, 29, 49, 30, 13, 45, 48, 16, 55, 6, 63, 1, 44, 14, 58, 19, 47, 15, 24, 51, 34, 6, 55, 5, 63, 20, 41, 21, 9 },
{ 30, 62, 18, 55, 5, 23, 39, 29, 49, 30, 15, 36, 28, 46, 60, 25, 39, 46, 4, 32, 61, 40, 15, 30, 36, 45, 14, 2, 49, 33, 57, 45, 18, 32, 3, 45, 30, 2, 35, 52, 40, 27, 13, 21, 38, 63, 20, 28, 37, 23, 16, 10, 13, 55, 2, 62, 21, 32, 60, 17, 58, 23, 5, 40, 16, 48, 7, 45, 10, 26, 43, 19, 6, 31, 52, 21, 39, 16, 48, 9, 37, 28, 36, 55, 7, 48, 3, 59, 15, 45, 25, 1, 53, 13, 47, 7, 62, 15, 4, 25, 12, 41, 18, 60, 38, 11, 34, 19, 39, 31, 29, 56, 23, 42, 3, 27, 60, 41, 8, 16, 61, 29, 43, 9, 32, 2, 60, 34 },
{ 3, 38, 13, 37, 52, 44, 2, 19, 12, 42, 63, 19, 40, 1, 20, 50, 12, 55, 15, 56, 27, 1, 54, 11, 57, 18, 32, 63, 44, 4, 29, 13, 37, 61, 35, 16, 42, 57, 12, 22, 6, 55, 43, 10, 50, 5, 44, 11, 48, 52, 34, 58, 28, 41, 38, 30, 7, 52, 11, 49, 30, 14, 45, 27, 59, 34, 21, 38, 32, 58, 11, 36, 56, 42, 9, 41, 3, 54, 31, 42, 0, 60, 16, 11, 39, 24, 52, 33, 6, 36, 10, 40, 32, 60, 26, 20, 39, 28, 47, 34, 63, 8, 54, 3, 24, 56, 0, 51, 13, 47, 16, 40, 7, 35, 52, 11, 36, 4, 57, 30, 39, 13, 18, 50, 58, 28, 12, 48 },
{ 57, 24, 49, 21, 10, 31, 61, 36, 56, 0, 22, 53, 11, 56, 32, 7, 36, 27, 41, 9, 46, 19, 34, 42, 25, 7, 50, 9, 28, 21, 54, 8, 50, 7, 27, 59, 10, 25, 48, 62, 37, 0, 33, 58, 25, 18, 32, 61, 0, 15, 45, 5, 50, 3, 23, 55, 47, 17, 40, 6, 60, 34, 53, 8, 41, 0, 61, 13, 54, 4, 46, 28, 0, 17, 48, 27, 58, 13, 23, 61, 33, 21, 50, 30, 62, 8, 14, 29, 56, 27, 61, 49, 17, 2, 44, 11, 51, 0, 59, 17, 40, 20, 32, 47, 36, 21, 42, 28, 60, 4, 54, 10, 59, 17, 30, 62, 21, 43, 26, 48, 0, 56, 36, 25, 8, 44, 39, 17 },
{ 10, 42, 4, 59, 27, 47, 8, 23, 51, 32, 45, 6, 37, 26, 48, 43, 62, 0, 21, 53, 38, 12, 51, 5, 60, 47, 24, 37, 59, 15, 35, 47, 22, 55, 0, 50, 21, 40, 6, 29, 15, 52, 24, 8, 41, 55, 13, 29, 40, 56, 24, 31, 19, 33, 61, 15, 0, 35, 24, 42, 21, 2, 19, 57, 24, 15, 30, 50, 20, 25, 40, 16, 57, 34, 61, 8, 29, 45, 6, 49, 11, 47, 2, 44, 19, 57, 38, 50, 12, 42, 21, 4, 35, 52, 28, 56, 23, 36, 13, 45, 4, 52, 27, 14, 6, 62, 9, 45, 21, 37, 25, 46, 33, 49, 0, 44, 7, 53, 13, 19, 53, 31, 3, 47, 15, 56, 22, 51 },
{ 35, 28, 53, 32, 1, 16, 54, 40, 9, 17, 25, 58, 14, 59, 3, 22, 16, 51, 31, 5, 23, 58, 28, 17, 35, 20, 0, 42, 11, 52, 3, 31, 41, 17, 43, 13, 32, 54, 18, 60, 32, 45, 17, 49, 2, 36, 51, 22, 7, 36, 9, 63, 48, 12, 46, 26, 43, 28, 63, 13, 48, 37, 51, 33, 5, 47, 55, 9, 42, 63, 7, 51, 24, 12, 37, 19, 55, 34, 18, 38, 15, 28, 54, 34, 5, 43, 22, 0, 48, 14, 54, 24, 58, 9, 38, 5, 32, 55, 21, 30, 49, 9, 59, 43, 30, 51, 35, 26, 7, 53, 2, 22, 14, 27, 57, 18, 38, 24, 33, 45, 10, 41, 20, 60, 37, 5, 32, 0 },
{ 63, 19, 15, 40, 62, 35, 14, 28, 46, 61, 4, 49, 35, 10, 29, 54, 33, 8, 45, 62, 37, 1, 43, 55, 10, 52, 61, 30, 19, 40, 25, 62, 11, 38, 27, 58, 36, 3, 46, 8, 39, 4, 62, 28, 47, 20, 4, 54, 47, 27, 43, 1, 21, 38, 8, 58, 10, 54, 4, 56, 9, 26, 12, 39, 60, 27, 18, 37, 1, 31, 35, 5, 45, 50, 2, 43, 26, 1, 59, 23, 56, 40, 7, 26, 58, 17, 32, 63, 25, 39, 7, 31, 45, 19, 63, 15, 48, 8, 37, 61, 16, 34, 1, 56, 18, 3, 15, 58, 49, 32, 63, 41, 55, 5, 40, 22, 50, 6, 59, 2, 63, 23, 52, 11, 26, 61, 44, 23 },
{ 11, 56, 46, 6, 22, 43, 58, 3, 34, 21, 38, 30, 18, 44, 52, 13, 41, 57, 17, 28, 14, 49, 25, 7, 33, 39, 26, 6, 56, 48, 1, 20, 56, 5, 46, 9, 19, 51, 30, 25, 56, 21, 35, 14, 57, 42, 16, 33, 10, 57, 17, 59, 41, 25, 53, 37, 20, 40, 30, 18, 31, 62, 44, 22, 3, 44, 11, 48, 23, 53, 18, 60, 29, 22, 62, 15, 53, 47, 10, 41, 3, 19, 52, 36, 13, 46, 10, 35, 3, 61, 41, 16, 1, 50, 26, 42, 18, 46, 2, 25, 54, 20, 39, 23, 47, 31, 41, 12, 38, 17, 8, 19, 31, 48, 12, 61, 9, 54, 29, 35, 15, 38, 6, 43, 34, 14, 7, 47 },
{ 39, 2, 33, 26, 53, 8, 18, 50, 41, 12, 53, 1, 63, 24, 19, 39, 2, 24, 47, 10, 60, 38, 19, 63, 48, 4, 15, 45, 32, 14, 60, 36, 29, 53, 23, 63, 34, 12, 61, 1, 43, 11, 53, 30, 1, 26, 60, 45, 23, 39, 3, 29, 12, 50, 4, 16, 51, 3, 45, 36, 50, 1, 16, 54, 35, 14, 57, 30, 58, 9, 46, 14, 41, 10, 32, 38, 4, 30, 21, 51, 32, 63, 25, 1, 60, 27, 53, 18, 51, 22, 28, 55, 34, 12, 40, 3, 60, 29, 57, 41, 6, 44, 11, 53, 8, 61, 24, 57, 1, 28, 44, 59, 36, 3, 34, 25, 41, 31, 16, 44, 22, 47, 28, 58, 1, 49, 54, 29 },
{ 58, 25, 50, 13, 38, 30, 60, 24, 6, 57, 27, 42, 9, 45, 6, 61, 30, 50, 4, 34, 29, 3, 46, 13, 22, 42, 58, 28, 9, 39, 23, 44, 7, 15, 44, 2, 40, 15, 47, 41, 23, 37, 7, 59, 38, 11, 34, 6, 62, 14, 52, 35, 55, 19, 32, 61, 33, 24, 57, 6, 22, 59, 29, 7, 49, 25, 40, 3, 17, 39, 27, 52, 0, 55, 16, 57, 24, 61, 36, 6, 29, 12, 48, 39, 20, 44, 6, 40, 33, 5, 48, 10, 57, 36, 22, 51, 33, 9, 24, 12, 62, 29, 50, 35, 14, 43, 5, 33, 47, 52, 13, 23, 10, 51, 56, 16, 46, 1, 49, 4, 61, 9, 52, 18, 31, 21, 36, 17 },
{ 19, 42, 9, 48, 2, 44, 11, 37, 48, 20, 33, 16, 55, 35, 49, 15, 37, 20, 59, 16, 53, 22, 56, 31, 50, 11, 34, 54, 16, 51, 4, 49, 33, 53, 21, 28, 56, 24, 31, 9, 52, 16, 48, 24, 44, 13, 51, 20, 31, 49, 18, 6, 34, 2, 44, 14, 47, 8, 15, 43, 13, 41, 33, 52, 20, 61, 7, 51, 34, 62, 4, 20, 36, 33, 43, 8, 46, 13, 53, 17, 45, 42, 9, 31, 52, 11, 30, 56, 13, 59, 17, 44, 27, 6, 62, 11, 43, 17, 49, 38, 26, 2, 16, 27, 58, 21, 54, 18, 26, 5, 35, 61, 43, 27, 7, 39, 14, 58, 37, 55, 20, 33, 13, 40, 62, 10, 55, 5 },
{ 51, 14, 61, 29, 59, 20, 55, 31, 0, 49, 11, 60, 3, 26, 22, 56, 0, 40, 12, 43, 41, 8, 36, 0, 17, 57, 24, 2, 46, 26, 61, 18, 0, 38, 12, 59, 6, 49, 3, 57, 19, 63, 5, 33, 18, 54, 28, 56, 0, 43, 26, 46, 63, 27, 56, 22, 27, 54, 38, 28, 63, 24, 10, 45, 0, 31, 42, 21, 12, 25, 44, 49, 59, 6, 26, 50, 3, 34, 27, 59, 0, 35, 62, 16, 4, 58, 47, 0, 43, 24, 37, 2, 54, 20, 46, 31, 0, 56, 34, 5, 55, 45, 60, 37, 0, 40, 10, 38, 63, 46, 15, 20, 0, 53, 21, 62, 30, 11, 24, 27, 40, 0, 57, 26, 3, 45, 27, 35 },
};
#else
#define DM_WIDTH 8
#define DM_WIDTH_SHIFT 3
#define DM_HEIGHT 8
static const guchar DM[8][8] =
{
{ 0, 32, 8, 40, 2, 34, 10, 42 },
{ 48, 16, 56, 24, 50, 18, 58, 26 },
{ 12, 44, 4, 36, 14, 46, 6, 38 },
{ 60, 28, 52, 20, 62, 30, 54, 22 },
{ 3, 35, 11, 43, 1, 33, 9, 41 },
{ 51, 19, 59, 27, 49, 17, 57, 25 },
{ 15, 47, 7, 39, 13, 45, 5, 37 },
{ 63, 31, 55, 23, 61, 29, 53, 21 }
};
#endif
static guint32 *DM_565 = NULL;
static void
gdk_rgb_preprocess_dm_565 (void)
{
int i;
guint32 dith;
if (DM_565 == NULL)
{
DM_565 = g_new (guint32, DM_WIDTH * DM_HEIGHT);
for (i = 0; i < DM_WIDTH * DM_HEIGHT; i++)
{
dith = DM[0][i] >> 3;
DM_565[i] = (dith << 20) | dith | (((7 - dith) >> 1) << 10);
#ifdef VERBOSE
g_print ("%i %x %x\n", i, dith, DM_565[i]);
#endif
}
}
}
static void
gdk_rgb_convert_8_d666 (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
gint bpl;
guchar *obuf, *obptr;
guchar *bptr, *bp2;
gint r, g, b;
const guchar *dmp;
gint dith;
guchar *colorcube_d = image_info->colorcube_d;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0;
for (y = 0; y < height; y++)
{
dmp = DM[(y_align + y) & (DM_HEIGHT - 1)];
bp2 = bptr;
obptr = obuf;
for (x = 0; x < width; x++)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
dith = (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) | 7;
r = ((r * 5) + dith) >> 8;
g = ((g * 5) + (262 - dith)) >> 8;
b = ((b * 5) + dith) >> 8;
obptr[0] = colorcube_d[(r << 6) | (g << 3) | b];
obptr++;
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_8_d (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align,
GdkRgbCmap *cmap)
{
int x, y;
gint bpl;
guchar *obuf, *obptr;
guchar *bptr, *bp2;
gint r, g, b;
const guchar *dmp;
gint dith;
gint rs, gs, bs;
guchar *colorcube_d = image_info->colorcube_d;
bptr = buf;
bpl = image->bpl;
rs = image_info->nred_shades - 1;
gs = image_info->ngreen_shades - 1;
bs = image_info->nblue_shades - 1;
obuf = ((guchar *)image->mem) + y0 * bpl + x0;
for (y = 0; y < height; y++)
{
dmp = DM[(y_align + y) & (DM_HEIGHT - 1)];
bp2 = bptr;
obptr = obuf;
for (x = 0; x < width; x++)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
dith = (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) | 7;
r = ((r * rs) + dith) >> 8;
g = ((g * gs) + (262 - dith)) >> 8;
b = ((b * bs) + dith) >> 8;
obptr[0] = colorcube_d[(r << 6) | (g << 3) | b];
obptr++;
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_8_indexed (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
gint bpl;
guchar *obuf, *obptr;
guchar *bptr, *bp2;
guchar c;
guchar *lut;
GdkRgbCmapInfo *cmap_info = gdk_rgb_cmap_get_info (cmap, image_info);
lut = cmap_info->lut;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0;
for (y = 0; y < height; y++)
{
bp2 = bptr;
obptr = obuf;
for (x = 0; x < width; x++)
{
c = *bp2++;
obptr[0] = lut[c];
obptr++;
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_gray8 (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
gint bpl;
guchar *obuf, *obptr;
guchar *bptr, *bp2;
gint r, g, b;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0;
for (y = 0; y < height; y++)
{
bp2 = bptr;
obptr = obuf;
for (x = 0; x < width; x++)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
obptr[0] = (g + ((b + r) >> 1)) >> 1;
obptr++;
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_gray8_gray (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int y;
gint bpl;
guchar *obuf;
guchar *bptr;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0;
for (y = 0; y < height; y++)
{
memcpy (obuf, bptr, width);
bptr += rowstride;
obuf += bpl;
}
}
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
#define HAIRY_CONVERT_565
#endif
#ifdef HAIRY_CONVERT_565
/* Render a 24-bit RGB image in buf into the GdkImage, without dithering.
This assumes native byte ordering - what should really be done is to
check whether the the image byte_order is consistent with the _ENDIAN
config flag, and if not, use a different function.
This one is even faster than the one below - its inner loop loads 3
words (i.e. 4 24-bit pixels), does a lot of shifting and masking,
then writes 2 words. */
static void
gdk_rgb_convert_565 (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf, *obptr;
gint bpl;
guchar *bptr, *bp2;
guchar r, g, b;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 2;
for (y = 0; y < height; y++)
{
bp2 = bptr;
obptr = obuf;
if (((unsigned long)obuf | (unsigned long) bp2) & 3)
{
for (x = 0; x < width; x++)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
((guint16 *)obptr)[0] = ((r & 0xf8) << 8) |
((g & 0xfc) << 3) |
(b >> 3);
obptr += 2;
}
}
else
{
for (x = 0; x < width - 3; x += 4)
{
guint32 r1b0g0r0;
guint32 g2r2b1g1;
guint32 b3g3r3b2;
r1b0g0r0 = ((guint32 *)bp2)[0];
g2r2b1g1 = ((guint32 *)bp2)[1];
b3g3r3b2 = ((guint32 *)bp2)[2];
((guint32 *)obptr)[0] =
((r1b0g0r0 & 0xf8) << 8) |
((r1b0g0r0 & 0xfc00) >> 5) |
((r1b0g0r0 & 0xf80000) >> 19) |
(r1b0g0r0 & 0xf8000000) |
((g2r2b1g1 & 0xfc) << 19) |
((g2r2b1g1 & 0xf800) << 5);
((guint32 *)obptr)[1] =
((g2r2b1g1 & 0xf80000) >> 8) |
((g2r2b1g1 & 0xfc000000) >> 21) |
((b3g3r3b2 & 0xf8) >> 3) |
((b3g3r3b2 & 0xf800) << 16) |
((b3g3r3b2 & 0xfc0000) << 3) |
((b3g3r3b2 & 0xf8000000) >> 11);
bp2 += 12;
obptr += 8;
}
for (; x < width; x++)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
((guint16 *)obptr)[0] = ((r & 0xf8) << 8) |
((g & 0xfc) << 3) |
(b >> 3);
obptr += 2;
}
}
bptr += rowstride;
obuf += bpl;
}
}
#else
/* Render a 24-bit RGB image in buf into the GdkImage, without dithering.
This assumes native byte ordering - what should really be done is to
check whether the image byte_order is consistent with the _ENDIAN
config flag, and if not, use a different function.
This routine is faster than the one included with Gtk 1.0 for a number
of reasons:
1. Shifting instead of lookup tables (less memory traffic).
2. Much less register pressure, especially because shifts are
in the code.
3. A memcpy is avoided (i.e. the transfer function).
4. On big-endian architectures, byte swapping is avoided.
That said, it wouldn't be hard to make it even faster - just make an
inner loop that reads 3 words (i.e. 4 24-bit pixels), does a lot of
shifting and masking, then writes 2 words.
*/
static void
gdk_rgb_convert_565 (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf;
gint bpl;
guchar *bptr, *bp2;
guchar r, g, b;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 2;
for (y = 0; y < height; y++)
{
bp2 = bptr;
for (x = 0; x < width; x++)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
((unsigned short *)obuf)[x] = ((r & 0xf8) << 8) |
((g & 0xfc) << 3) |
(b >> 3);
}
bptr += rowstride;
obuf += bpl;
}
}
#endif
#ifdef HAIRY_CONVERT_565
static void
gdk_rgb_convert_565_gray (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf, *obptr;
gint bpl;
guchar *bptr, *bp2;
guchar g;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 2;
for (y = 0; y < height; y++)
{
bp2 = bptr;
obptr = obuf;
if (((unsigned long)obuf | (unsigned long) bp2) & 3)
{
for (x = 0; x < width; x++)
{
g = *bp2++;
((guint16 *)obptr)[0] = ((g & 0xf8) << 8) |
((g & 0xfc) << 3) |
(g >> 3);
obptr += 2;
}
}
else
{
for (x = 0; x < width - 3; x += 4)
{
guint32 g3g2g1g0;
g3g2g1g0 = ((guint32 *)bp2)[0];
((guint32 *)obptr)[0] =
((g3g2g1g0 & 0xf8) << 8) |
((g3g2g1g0 & 0xfc) << 3) |
((g3g2g1g0 & 0xf8) >> 3) |
(g3g2g1g0 & 0xf800) << 16 |
((g3g2g1g0 & 0xfc00) << 11) |
((g3g2g1g0 & 0xf800) << 5);
((guint32 *)obptr)[1] =
((g3g2g1g0 & 0xf80000) >> 8) |
((g3g2g1g0 & 0xfc0000) >> 13) |
((g3g2g1g0 & 0xf80000) >> 19) |
(g3g2g1g0 & 0xf8000000) |
((g3g2g1g0 & 0xfc000000) >> 5) |
((g3g2g1g0 & 0xf8000000) >> 11);
bp2 += 4;
obptr += 8;
}
for (; x < width; x++)
{
g = *bp2++;
((guint16 *)obptr)[0] = ((g & 0xf8) << 8) |
((g & 0xfc) << 3) |
(g >> 3);
obptr += 2;
}
}
bptr += rowstride;
obuf += bpl;
}
}
#else
static void
gdk_rgb_convert_565_gray (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf;
gint bpl;
guchar *bptr, *bp2;
guchar g;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 2;
for (y = 0; y < height; y++)
{
bp2 = bptr;
for (x = 0; x < width; x++)
{
g = *bp2++;
((guint16 *)obuf)[x] = ((g & 0xf8) << 8) |
((g & 0xfc) << 3) |
(g >> 3);
}
bptr += rowstride;
obuf += bpl;
}
}
#endif
static void
gdk_rgb_convert_565_br (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf;
gint bpl;
guchar *bptr, *bp2;
guchar r, g, b;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 2;
for (y = 0; y < height; y++)
{
bp2 = bptr;
for (x = 0; x < width; x++)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
/* final word is:
g4 g3 g2 b7 b6 b5 b4 b3 r7 r6 r5 r4 r3 g7 g6 g5
*/
((unsigned short *)obuf)[x] = (r & 0xf8) |
((g & 0xe0) >> 5) |
((g & 0x1c) << 11) |
((b & 0xf8) << 5);
}
bptr += rowstride;
obuf += bpl;
}
}
/* Thanks to Ray Lehtiniemi for a patch that resulted in a ~25% speedup
in this mode. */
#ifdef HAIRY_CONVERT_565
static void
gdk_rgb_convert_565_d (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
/* Now this is what I'd call some highly tuned code! */
int x, y;
guchar *obuf, *obptr;
gint bpl;
guchar *bptr, *bp2;
width += x_align;
height += y_align;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 2;
for (y = y_align; y < height; y++)
{
guint32 *dmp = DM_565 + ((y & (DM_HEIGHT - 1)) << DM_WIDTH_SHIFT);
bp2 = bptr;
obptr = obuf;
if (((unsigned long)obuf | (unsigned long) bp2) & 3)
{
for (x = x_align; x < width; x++)
{
gint32 rgb = *bp2++ << 20;
rgb += *bp2++ << 10;
rgb += *bp2++;
rgb += dmp[x & (DM_WIDTH - 1)];
rgb += 0x10040100
- ((rgb & 0x1e0001e0) >> 5)
- ((rgb & 0x00070000) >> 6);
((unsigned short *)obptr)[0] =
((rgb & 0x0f800000) >> 12) |
((rgb & 0x0003f000) >> 7) |
((rgb & 0x000000f8) >> 3);
obptr += 2;
}
}
else
{
for (x = x_align; x < width - 3; x += 4)
{
guint32 r1b0g0r0;
guint32 g2r2b1g1;
guint32 b3g3r3b2;
guint32 rgb02, rgb13;
r1b0g0r0 = ((guint32 *)bp2)[0];
g2r2b1g1 = ((guint32 *)bp2)[1];
b3g3r3b2 = ((guint32 *)bp2)[2];
rgb02 =
((r1b0g0r0 & 0xff) << 20) +
((r1b0g0r0 & 0xff00) << 2) +
((r1b0g0r0 & 0xff0000) >> 16) +
dmp[x & (DM_WIDTH - 1)];
rgb02 += 0x10040100
- ((rgb02 & 0x1e0001e0) >> 5)
- ((rgb02 & 0x00070000) >> 6);
rgb13 =
((r1b0g0r0 & 0xff000000) >> 4) +
((g2r2b1g1 & 0xff) << 10) +
((g2r2b1g1 & 0xff00) >> 8) +
dmp[(x + 1) & (DM_WIDTH - 1)];
rgb13 += 0x10040100
- ((rgb13 & 0x1e0001e0) >> 5)
- ((rgb13 & 0x00070000) >> 6);
((guint32 *)obptr)[0] =
((rgb02 & 0x0f800000) >> 12) |
((rgb02 & 0x0003f000) >> 7) |
((rgb02 & 0x000000f8) >> 3) |
((rgb13 & 0x0f800000) << 4) |
((rgb13 & 0x0003f000) << 9) |
((rgb13 & 0x000000f8) << 13);
rgb02 =
((g2r2b1g1 & 0xff0000) << 4) +
((g2r2b1g1 & 0xff000000) >> 14) +
(b3g3r3b2 & 0xff) +
dmp[(x + 2) & (DM_WIDTH - 1)];
rgb02 += 0x10040100
- ((rgb02 & 0x1e0001e0) >> 5)
- ((rgb02 & 0x00070000) >> 6);
rgb13 =
((b3g3r3b2 & 0xff00) << 12) +
((b3g3r3b2 & 0xff0000) >> 6) +
((b3g3r3b2 & 0xff000000) >> 24) +
dmp[(x + 3) & (DM_WIDTH - 1)];
rgb13 += 0x10040100
- ((rgb13 & 0x1e0001e0) >> 5)
- ((rgb13 & 0x00070000) >> 6);
((guint32 *)obptr)[1] =
((rgb02 & 0x0f800000) >> 12) |
((rgb02 & 0x0003f000) >> 7) |
((rgb02 & 0x000000f8) >> 3) |
((rgb13 & 0x0f800000) << 4) |
((rgb13 & 0x0003f000) << 9) |
((rgb13 & 0x000000f8) << 13);
bp2 += 12;
obptr += 8;
}
for (; x < width; x++)
{
gint32 rgb = *bp2++ << 20;
rgb += *bp2++ << 10;
rgb += *bp2++;
rgb += dmp[x & (DM_WIDTH - 1)];
rgb += 0x10040100
- ((rgb & 0x1e0001e0) >> 5)
- ((rgb & 0x00070000) >> 6);
((unsigned short *)obptr)[0] =
((rgb & 0x0f800000) >> 12) |
((rgb & 0x0003f000) >> 7) |
((rgb & 0x000000f8) >> 3);
obptr += 2;
}
}
bptr += rowstride;
obuf += bpl;
}
}
#else
static void
gdk_rgb_convert_565_d (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf;
gint bpl;
guchar *bptr;
width += x_align;
height += y_align;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + (x0 - x_align) * 2;
for (y = y_align; y < height; y++)
{
guint32 *dmp = DM_565 + ((y & (DM_HEIGHT - 1)) << DM_WIDTH_SHIFT);
guchar *bp2 = bptr;
for (x = x_align; x < width; x++)
{
gint32 rgb = *bp2++ << 20;
rgb += *bp2++ << 10;
rgb += *bp2++;
rgb += dmp[x & (DM_WIDTH - 1)];
rgb += 0x10040100
- ((rgb & 0x1e0001e0) >> 5)
- ((rgb & 0x00070000) >> 6);
((unsigned short *)obuf)[x] =
((rgb & 0x0f800000) >> 12) |
((rgb & 0x0003f000) >> 7) |
((rgb & 0x000000f8) >> 3);
}
bptr += rowstride;
obuf += bpl;
}
}
#endif
static void
gdk_rgb_convert_555 (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf;
gint bpl;
guchar *bptr, *bp2;
guchar r, g, b;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 2;
for (y = 0; y < height; y++)
{
bp2 = bptr;
for (x = 0; x < width; x++)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
((unsigned short *)obuf)[x] = ((r & 0xf8) << 7) |
((g & 0xf8) << 2) |
(b >> 3);
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_555_br (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf;
gint bpl;
guchar *bptr, *bp2;
guchar r, g, b;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 2;
for (y = 0; y < height; y++)
{
bp2 = bptr;
for (x = 0; x < width; x++)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
/* final word is:
g5 g4 g3 b7 b6 b5 b4 b3 0 r7 r6 r5 r4 r3 g7 g6
*/
((unsigned short *)obuf)[x] = ((r & 0xf8) >> 1) |
((g & 0xc0) >> 6) |
((g & 0x38) << 10) |
((b & 0xf8) << 5);
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_888_msb (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int y;
guchar *obuf;
gint bpl;
guchar *bptr;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 3;
for (y = 0; y < height; y++)
{
memcpy (obuf, bptr, width + width + width);
bptr += rowstride;
obuf += bpl;
}
}
/* todo: optimize this */
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
#define HAIRY_CONVERT_888
#endif
#ifdef HAIRY_CONVERT_888
static void
gdk_rgb_convert_888_lsb (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf, *obptr;
gint bpl;
guchar *bptr, *bp2;
int r, g, b;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 3;
for (y = 0; y < height; y++)
{
bp2 = bptr;
obptr = obuf;
if (((unsigned long)obuf | (unsigned long) bp2) & 3)
{
for (x = 0; x < width; x++)
{
r = bp2[0];
g = bp2[1];
b = bp2[2];
*obptr++ = b;
*obptr++ = g;
*obptr++ = r;
bp2 += 3;
}
}
else
{
for (x = 0; x < width - 3; x += 4)
{
guint32 r1b0g0r0;
guint32 g2r2b1g1;
guint32 b3g3r3b2;
r1b0g0r0 = ((guint32 *)bp2)[0];
g2r2b1g1 = ((guint32 *)bp2)[1];
b3g3r3b2 = ((guint32 *)bp2)[2];
((guint32 *)obptr)[0] =
(r1b0g0r0 & 0xff00) |
((r1b0g0r0 & 0xff0000) >> 16) |
(((g2r2b1g1 & 0xff00) | (r1b0g0r0 & 0xff)) << 16);
((guint32 *)obptr)[1] =
(g2r2b1g1 & 0xff0000ff) |
((r1b0g0r0 & 0xff000000) >> 16) |
((b3g3r3b2 & 0xff) << 16);
((guint32 *)obptr)[2] =
(((g2r2b1g1 & 0xff0000) | (b3g3r3b2 & 0xff000000)) >> 16) |
((b3g3r3b2 & 0xff00) << 16) |
((b3g3r3b2 & 0xff0000));
bp2 += 12;
obptr += 12;
}
for (; x < width; x++)
{
r = bp2[0];
g = bp2[1];
b = bp2[2];
*obptr++ = b;
*obptr++ = g;
*obptr++ = r;
bp2 += 3;
}
}
bptr += rowstride;
obuf += bpl;
}
}
#else
static void
gdk_rgb_convert_888_lsb (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf;
gint bpl;
guchar *bptr, *bp2;
int r, g, b;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 3;
for (y = 0; y < height; y++)
{
bp2 = bptr;
for (x = 0; x < width; x++)
{
r = bp2[0];
g = bp2[1];
b = bp2[2];
obuf[x * 3] = b;
obuf[x * 3 + 1] = g;
obuf[x * 3 + 2] = r;
bp2 += 3;
}
bptr += rowstride;
obuf += bpl;
}
}
#endif
/* convert 24-bit packed to 32-bit unpacked */
/* todo: optimize this */
static void
gdk_rgb_convert_0888 (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf;
gint bpl;
guchar *bptr, *bp2;
int r, g, b;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 4;
for (y = 0; y < height; y++)
{
bp2 = bptr;
for (x = 0; x < width; x++)
{
r = bp2[0];
g = bp2[1];
b = bp2[2];
((guint32 *)obuf)[x] = (r << 16) | (g << 8) | b;
bp2 += 3;
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_0888_br (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf;
gint bpl;
guchar *bptr, *bp2;
int r, g, b;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 4;
for (y = 0; y < height; y++)
{
bp2 = bptr;
for (x = 0; x < width; x++)
{
r = bp2[0];
g = bp2[1];
b = bp2[2];
((guint32 *)obuf)[x] = (b << 24) | (g << 16) | (r << 8);
bp2 += 3;
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_8880_br (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf;
gint bpl;
guchar *bptr, *bp2;
int r, g, b;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * 4;
for (y = 0; y < height; y++)
{
bp2 = bptr;
for (x = 0; x < width; x++)
{
r = bp2[0];
g = bp2[1];
b = bp2[2];
((guint32 *)obuf)[x] = (b << 16) | (g << 8) | r;
bp2 += 3;
}
bptr += rowstride;
obuf += bpl;
}
}
/* Generic truecolor/directcolor conversion function. Slow, but these
are oddball modes. */
static void
gdk_rgb_convert_truecolor_lsb (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align,
GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf, *obptr;
gint bpl;
guchar *bptr, *bp2;
gint r, g, b;
gint r_right, r_left;
gint g_right, g_left;
gint b_right, b_left;
gint bpp;
guint32 pixel;
gint i;
r_right = 8 - image_info->visual->red_prec;
r_left = image_info->visual->red_shift;
g_right = 8 - image_info->visual->green_prec;
g_left = image_info->visual->green_shift;
b_right = 8 - image_info->visual->blue_prec;
b_left = image_info->visual->blue_shift;
bpp = image_info->bpp;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * bpp;
for (y = 0; y < height; y++)
{
obptr = obuf;
bp2 = bptr;
for (x = 0; x < width; x++)
{
r = bp2[0];
g = bp2[1];
b = bp2[2];
pixel = ((r >> r_right) << r_left) |
((g >> g_right) << g_left) |
((b >> b_right) << b_left);
for (i = 0; i < bpp; i++)
{
*obptr++ = pixel & 0xff;
pixel >>= 8;
}
bp2 += 3;
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_truecolor_lsb_d (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align,
GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf, *obptr;
gint bpl;
guchar *bptr, *bp2;
gint r, g, b;
gint r_right, r_left, r_prec;
gint g_right, g_left, g_prec;
gint b_right, b_left, b_prec;
gint bpp;
guint32 pixel;
gint i;
gint dith;
gint r1, g1, b1;
const guchar *dmp;
r_right = 8 - image_info->visual->red_prec;
r_left = image_info->visual->red_shift;
r_prec = image_info->visual->red_prec;
g_right = 8 - image_info->visual->green_prec;
g_left = image_info->visual->green_shift;
g_prec = image_info->visual->green_prec;
b_right = 8 - image_info->visual->blue_prec;
b_left = image_info->visual->blue_shift;
b_prec = image_info->visual->blue_prec;
bpp = image_info->bpp;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * bpp;
for (y = 0; y < height; y++)
{
dmp = DM[(y_align + y) & (DM_HEIGHT - 1)];
obptr = obuf;
bp2 = bptr;
for (x = 0; x < width; x++)
{
r = bp2[0];
g = bp2[1];
b = bp2[2];
dith = dmp[(x_align + x) & (DM_WIDTH - 1)] << 2;
r1 = r + (dith >> r_prec);
g1 = g + ((252 - dith) >> g_prec);
b1 = b + (dith >> b_prec);
pixel = (((r1 - (r1 >> r_prec)) >> r_right) << r_left) |
(((g1 - (g1 >> g_prec)) >> g_right) << g_left) |
(((b1 - (b1 >> b_prec)) >> b_right) << b_left);
for (i = 0; i < bpp; i++)
{
*obptr++ = pixel & 0xff;
pixel >>= 8;
}
bp2 += 3;
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_truecolor_msb (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align,
GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf, *obptr;
gint bpl;
guchar *bptr, *bp2;
gint r, g, b;
gint r_right, r_left;
gint g_right, g_left;
gint b_right, b_left;
gint bpp;
guint32 pixel;
gint shift, shift_init;
r_right = 8 - image_info->visual->red_prec;
r_left = image_info->visual->red_shift;
g_right = 8 - image_info->visual->green_prec;
g_left = image_info->visual->green_shift;
b_right = 8 - image_info->visual->blue_prec;
b_left = image_info->visual->blue_shift;
bpp = image_info->bpp;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * bpp;
shift_init = (bpp - 1) << 3;
for (y = 0; y < height; y++)
{
obptr = obuf;
bp2 = bptr;
for (x = 0; x < width; x++)
{
r = bp2[0];
g = bp2[1];
b = bp2[2];
pixel = ((r >> r_right) << r_left) |
((g >> g_right) << g_left) |
((b >> b_right) << b_left);
for (shift = shift_init; shift >= 0; shift -= 8)
{
*obptr++ = (pixel >> shift) & 0xff;
}
bp2 += 3;
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_truecolor_msb_d (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align,
GdkRgbCmap *cmap)
{
int x, y;
guchar *obuf, *obptr;
gint bpl;
guchar *bptr, *bp2;
gint r, g, b;
gint r_right, r_left, r_prec;
gint g_right, g_left, g_prec;
gint b_right, b_left, b_prec;
gint bpp;
guint32 pixel;
gint shift, shift_init;
gint dith;
gint r1, g1, b1;
const guchar *dmp;
r_right = 8 - image_info->visual->red_prec;
r_left = image_info->visual->red_shift;
r_prec = image_info->visual->red_prec;
g_right = 8 - image_info->visual->green_prec;
g_left = image_info->visual->green_shift;
g_prec = image_info->visual->green_prec;
b_right = 8 - image_info->visual->blue_prec;
b_left = image_info->visual->blue_shift;
b_prec = image_info->visual->blue_prec;
bpp = image_info->bpp;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0 * bpp;
shift_init = (bpp - 1) << 3;
for (y = 0; y < height; y++)
{
dmp = DM[(y_align + y) & (DM_HEIGHT - 1)];
obptr = obuf;
bp2 = bptr;
for (x = 0; x < width; x++)
{
r = bp2[0];
g = bp2[1];
b = bp2[2];
dith = dmp[(x_align + x) & (DM_WIDTH - 1)] << 2;
r1 = r + (dith >> r_prec);
g1 = g + ((252 - dith) >> g_prec);
b1 = b + (dith >> b_prec);
pixel = (((r1 - (r1 >> r_prec)) >> r_right) << r_left) |
(((g1 - (g1 >> g_prec)) >> g_right) << g_left) |
(((b1 - (b1 >> b_prec)) >> b_right) << b_left);
for (shift = shift_init; shift >= 0; shift -= 8)
{
*obptr++ = (pixel >> shift) & 0xff;
}
bp2 += 3;
}
bptr += rowstride;
obuf += bpl;
}
}
/* This actually works for depths from 3 to 7 */
static void
gdk_rgb_convert_4 (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align,
GdkRgbCmap *cmap)
{
int x, y;
gint bpl;
guchar *obuf, *obptr;
guchar *bptr, *bp2;
gint r, g, b;
const guchar *dmp;
gint dith;
guchar *colorcube_d = image_info->colorcube_d;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0;
for (y = 0; y < height; y++)
{
dmp = DM[(y_align + y) & (DM_HEIGHT - 1)];
bp2 = bptr;
obptr = obuf;
for (x = 0; x < width; x += 1)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
dith = (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) | 3;
obptr[0] = colorcube_d[(((r + dith) & 0x100) >> 2) |
(((g + 258 - dith) & 0x100) >> 5) |
(((b + dith) & 0x100) >> 8)];
obptr++;
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_4_pack (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align,
GdkRgbCmap *cmap)
{
int x, y, ix;
gint bpl;
guchar *obuf, *obptr;
guchar *bptr, *bp2;
gint r, g, b;
const guchar *dmp;
gint dith;
guchar *colorcube_d = image_info->colorcube_d;
guchar pix0, pix1;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + (x0 >> 1);
for (y = 0; y < height; y++)
{
dmp = DM[(y_align + y) & (DM_HEIGHT - 1)];
bp2 = bptr;
obptr = obuf;
x = 0;
if (x0 & 1)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
dith = (dmp[(x_align + x + 1) & (DM_WIDTH - 1)] << 2) | 3;
ix = (((r + dith) & 0x100) >> 2) |
(((g + 258 - dith) & 0x100) >> 5) |
(((b + dith) & 0x100) >> 8);
pix1 = (colorcube_d[ix]);
*obptr = (*obptr & 0xF0) | pix1;
obptr++;
x++;
}
while (x < width)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
dith = (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) | 3;
ix = (((r + dith) & 0x100) >> 2) |
(((g + 258 - dith) & 0x100) >> 5) |
(((b + dith) & 0x100) >> 8);
pix0 = (colorcube_d[ix]);
x++;
if (x == width)
pix1 = (*obptr & 0x0F);
else
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
dith = (dmp[(x_align + x + 1) & (DM_WIDTH - 1)] << 2) | 3;
ix = (((r + dith) & 0x100) >> 2) |
(((g + 258 - dith) & 0x100) >> 5) |
(((b + dith) & 0x100) >> 8);
pix1 = (colorcube_d[ix]);
x++;
}
*obptr++ = (pix0 << 4) | pix1;
}
bptr += rowstride;
obuf += bpl;
}
}
/* This actually works for depths from 3 to 7 */
static void
gdk_rgb_convert_gray4 (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
gint bpl;
guchar *obuf, *obptr;
guchar *bptr, *bp2;
gint r, g, b;
gint shift;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0;
shift = 9 - image_info->visual->depth;
for (y = 0; y < height; y++)
{
bp2 = bptr;
obptr = obuf;
for (x = 0; x < width; x++)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
obptr[0] = (g + ((b + r) >> 1)) >> shift;
obptr++;
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_gray4_pack (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
gint bpl;
guchar *obuf, *obptr;
guchar *bptr, *bp2;
gint r, g, b;
gint shift;
guchar pix0, pix1;
/* todo: this is hardcoded to big-endian. Make endian-agile. */
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + (x0 >> 1);
shift = 9 - image_info->visual->depth;
for (y = 0; y < height; y++)
{
bp2 = bptr;
obptr = obuf;
x = 0;
if (x0 & 1)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
pix1 = (g + ((b + r) >> 1)) >> shift;
*obptr = (*obptr & 0xF0) | pix1;
obptr++;
x++;
}
while (x < width)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
pix0 = (g + ((b + r) >> 1)) >> shift;
x++;
if (x == width)
pix1 = (*obptr & 0x0F);
else
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
pix1 = (g + ((b + r) >> 1)) >> shift;
x++;
}
*obptr++ = (pix0 << 4) | pix1;
}
bptr += rowstride;
obuf += bpl;
}
}
/* This actually works for depths from 3 to 7 */
static void
gdk_rgb_convert_gray4_d (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
gint bpl;
guchar *obuf, *obptr;
guchar *bptr, *bp2;
gint r, g, b;
const guchar *dmp;
gint prec, right;
gint gray;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + x0;
prec = image_info->visual->depth;
right = 8 - prec;
for (y = 0; y < height; y++)
{
bp2 = bptr;
obptr = obuf;
dmp = DM[(y_align + y) & (DM_HEIGHT - 1)];
for (x = 0; x < width; x++)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
gray = (g + ((b + r) >> 1)) >> 1;
gray += (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) >> prec;
obptr[0] = (gray - (gray >> prec)) >> right;
obptr++;
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_gray4_d_pack (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
int x, y;
gint bpl;
guchar *obuf, *obptr;
guchar *bptr, *bp2;
gint r, g, b;
const guchar *dmp;
gint prec, right;
gint gray;
guchar pix0, pix1;
/* todo: this is hardcoded to big-endian. Make endian-agile. */
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + (x0 >> 1);
prec = image_info->visual->depth;
right = 8 - prec;
for (y = 0; y < height; y++)
{
bp2 = bptr;
obptr = obuf;
dmp = DM[(y_align + y) & (DM_HEIGHT - 1)];
x = 0;
if (x0 & 1)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
gray = (g + ((b + r) >> 1)) >> 1;
gray += (dmp[(x_align + x + 1) & (DM_WIDTH - 1)] << 2) >> prec;
pix1 = (gray - (gray >> prec)) >> right;
*obptr = (*obptr & 0xF0) | pix1;
obptr++;
x++;
}
while (x < width)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
gray = (g + ((b + r) >> 1)) >> 1;
gray += (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) >> prec;
pix0 = (gray - (gray >> prec)) >> right;
x++;
if (x == width)
pix1 = (*obptr & 0x0F);
else
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
gray = (g + ((b + r) >> 1)) >> 1;
gray += (dmp[(x_align + x + 1) & (DM_WIDTH - 1)] << 2) >> prec;
pix1 = (gray - (gray >> prec)) >> right;
x++;
}
*obptr++ = (pix0 << 4) | pix1;
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_1 (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align,
GdkRgbCmap *cmap)
{
int x, y;
gint bpl;
guchar *obuf, *obptr;
guchar *bptr, *bp2;
gint r, g, b;
const guchar *dmp;
gint dith;
guchar byte;
bptr = buf;
bpl = image->bpl;
obuf = ((guchar *)image->mem) + y0 * bpl + (x0 >> 3);
byte = 0; /* unnecessary, but it keeps gcc from complaining */
for (y = 0; y < height; y++)
{
dmp = DM[(y_align + y) & (DM_HEIGHT - 1)];
bp2 = bptr;
obptr = obuf;
for (x = 0; x < width; x++)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
dith = (dmp[(x_align + x) & (DM_WIDTH - 1)] << 4) | 4;
byte += byte + (r + g + g + b + dith > 1020);
if ((x & 7) == 7)
{
obptr[0] = byte;
obptr++;
}
}
if (x & 7)
obptr[0] = byte << (8 - (x & 7));
bptr += rowstride;
obuf += bpl;
}
}
/* Returns a pointer to the stage buffer. */
static guchar *
gdk_rgb_ensure_stage (GdkRgbInfo *image_info)
{
if (image_info->stage_buf == NULL)
image_info->stage_buf = g_malloc (GDK_SCRATCH_IMAGE_HEIGHT * STAGE_ROWSTRIDE);
return image_info->stage_buf;
}
/* This is slow. Speed me up, please. */
static void
gdk_rgb_32_to_stage (GdkRgbInfo *image_info,
guchar *buf, gint rowstride, gint width, gint height)
{
gint x, y;
guchar *pi_start, *po_start;
guchar *pi, *po;
pi_start = buf;
po_start = gdk_rgb_ensure_stage (image_info);
for (y = 0; y < height; y++)
{
pi = pi_start;
po = po_start;
for (x = 0; x < width; x++)
{
*po++ = *pi++;
*po++ = *pi++;
*po++ = *pi++;
pi++;
}
pi_start += rowstride;
po_start += STAGE_ROWSTRIDE;
}
}
/* Generic 32bit RGB conversion function - convert to 24bit packed, then
go from there. */
static void
gdk_rgb_convert_32_generic (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, gint rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
gdk_rgb_32_to_stage (image_info, buf, rowstride, width, height);
(*image_info->conv) (image_info, image, x0, y0, width, height,
image_info->stage_buf, STAGE_ROWSTRIDE,
x_align, y_align, cmap);
}
/* Generic 32bit RGB conversion function - convert to 24bit packed, then
go from there. */
static void
gdk_rgb_convert_32_generic_d (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, gint rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
gdk_rgb_32_to_stage (image_info, buf, rowstride, width, height);
(*image_info->conv_d) (image_info, image, x0, y0, width, height,
image_info->stage_buf, STAGE_ROWSTRIDE,
x_align, y_align, cmap);
}
/* This is slow. Speed me up, please. */
static void
gdk_rgb_gray_to_stage (GdkRgbInfo *image_info,
guchar *buf, gint rowstride, gint width, gint height)
{
gint x, y;
guchar *pi_start, *po_start;
guchar *pi, *po;
guchar gray;
pi_start = buf;
po_start = gdk_rgb_ensure_stage (image_info);
for (y = 0; y < height; y++)
{
pi = pi_start;
po = po_start;
for (x = 0; x < width; x++)
{
gray = *pi++;
*po++ = gray;
*po++ = gray;
*po++ = gray;
}
pi_start += rowstride;
po_start += STAGE_ROWSTRIDE;
}
}
/* Generic gray conversion function - convert to 24bit packed, then go
from there. */
static void
gdk_rgb_convert_gray_generic (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, gint rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
gdk_rgb_gray_to_stage (image_info, buf, rowstride, width, height);
(*image_info->conv) (image_info, image, x0, y0, width, height,
image_info->stage_buf, STAGE_ROWSTRIDE,
x_align, y_align, cmap);
}
static void
gdk_rgb_convert_gray_generic_d (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, gint rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
gdk_rgb_gray_to_stage (image_info, buf, rowstride, width, height);
(*image_info->conv_d) (image_info, image, x0, y0, width, height,
image_info->stage_buf, STAGE_ROWSTRIDE,
x_align, y_align, cmap);
}
/* Render grayscale using indexed method. */
static void
gdk_rgb_convert_gray_cmap (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, gint rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
(*image_info->conv_indexed) (image_info, image, x0, y0, width, height,
buf, rowstride,
x_align, y_align, image_info->gray_cmap);
}
#if 0
static void
gdk_rgb_convert_gray_cmap_d (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, gint rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
(*image_info->conv_indexed_d) (image_info, image, x0, y0, width, height,
buf, rowstride,
x_align, y_align, image_info->gray_cmap);
}
#endif
/* This is slow. Speed me up, please. */
static void
gdk_rgb_indexed_to_stage (GdkRgbInfo *image_info,
guchar *buf, gint rowstride, gint width, gint height,
GdkRgbCmap *cmap)
{
gint x, y;
guchar *pi_start, *po_start;
guchar *pi, *po;
gint rgb;
pi_start = buf;
po_start = gdk_rgb_ensure_stage (image_info);
for (y = 0; y < height; y++)
{
pi = pi_start;
po = po_start;
for (x = 0; x < width; x++)
{
rgb = cmap->colors[*pi++];
*po++ = rgb >> 16;
*po++ = (rgb >> 8) & 0xff;
*po++ = rgb & 0xff;
}
pi_start += rowstride;
po_start += STAGE_ROWSTRIDE;
}
}
/* Generic gray conversion function - convert to 24bit packed, then go
from there. */
static void
gdk_rgb_convert_indexed_generic (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, gint rowstride,
gint x_align, gint y_align, GdkRgbCmap *cmap)
{
gdk_rgb_indexed_to_stage (image_info, buf, rowstride, width, height, cmap);
(*image_info->conv) (image_info, image, x0, y0, width, height,
image_info->stage_buf, STAGE_ROWSTRIDE,
x_align, y_align, cmap);
}
static void
gdk_rgb_convert_indexed_generic_d (GdkRgbInfo *image_info, GdkImage *image,
gint x0, gint y0, gint width, gint height,
guchar *buf, gint rowstride,
gint x_align, gint y_align,
GdkRgbCmap *cmap)
{
gdk_rgb_indexed_to_stage (image_info, buf, rowstride, width, height, cmap);
(*image_info->conv_d) (image_info, image, x0, y0, width, height,
image_info->stage_buf, STAGE_ROWSTRIDE,
x_align, y_align, cmap);
}
/* Select a conversion function based on the visual and a
representative image. */
static void
gdk_rgb_select_conv (GdkRgbInfo *image_info)
{
GdkByteOrder byte_order;
gint depth, bpp, byterev;
GdkVisualType vtype;
guint32 red_mask, green_mask, blue_mask;
GdkRgbConvFunc conv, conv_d;
GdkRgbConvFunc conv_32, conv_32_d;
GdkRgbConvFunc conv_gray, conv_gray_d;
GdkRgbConvFunc conv_indexed, conv_indexed_d;
gboolean mask_rgb, mask_bgr;
depth = image_info->visual->depth;
bpp = _gdk_windowing_get_bits_for_depth (image_info->visual->depth);
byte_order = image_info->visual->byte_order;
if (gdk_rgb_verbose)
g_print ("Chose visual type=%s depth=%d, image bpp=%d, %s first\n",
visual_names[image_info->visual->type], image_info->visual->depth,
bpp, byte_order == GDK_LSB_FIRST ? "lsb" : "msb");
#if G_BYTE_ORDER == G_BIG_ENDIAN
byterev = (byte_order == GDK_LSB_FIRST);
#else
byterev = (byte_order == GDK_MSB_FIRST);
#endif
vtype = image_info->visual->type;
if (vtype == GDK_VISUAL_DIRECT_COLOR)
vtype = GDK_VISUAL_TRUE_COLOR;
red_mask = image_info->visual->red_mask;
green_mask = image_info->visual->green_mask;
blue_mask = image_info->visual->blue_mask;
mask_rgb = red_mask == 0xff0000 && green_mask == 0xff00 && blue_mask == 0xff;
mask_bgr = red_mask == 0xff && green_mask == 0xff00 && blue_mask == 0xff0000;
conv = NULL;
conv_d = NULL;
conv_32 = gdk_rgb_convert_32_generic;
conv_32_d = gdk_rgb_convert_32_generic_d;
conv_gray = gdk_rgb_convert_gray_generic;
conv_gray_d = gdk_rgb_convert_gray_generic_d;
conv_indexed = gdk_rgb_convert_indexed_generic;
conv_indexed_d = gdk_rgb_convert_indexed_generic_d;
image_info->dith_default = FALSE;
if (image_info->bitmap)
conv = gdk_rgb_convert_1;
else if (bpp == 16 && depth == 16 && !byterev &&
red_mask == 0xf800 && green_mask == 0x7e0 && blue_mask == 0x1f)
{
conv = gdk_rgb_convert_565;
conv_d = gdk_rgb_convert_565_d;
conv_gray = gdk_rgb_convert_565_gray;
gdk_rgb_preprocess_dm_565 ();
}
else if (bpp == 16 && depth == 16 &&
vtype == GDK_VISUAL_TRUE_COLOR && byterev &&
red_mask == 0xf800 && green_mask == 0x7e0 && blue_mask == 0x1f)
conv = gdk_rgb_convert_565_br;
else if (bpp == 16 && depth == 15 &&
vtype == GDK_VISUAL_TRUE_COLOR && !byterev &&
red_mask == 0x7c00 && green_mask == 0x3e0 && blue_mask == 0x1f)
conv = gdk_rgb_convert_555;
else if (bpp == 16 && depth == 15 &&
vtype == GDK_VISUAL_TRUE_COLOR && byterev &&
red_mask == 0x7c00 && green_mask == 0x3e0 && blue_mask == 0x1f)
conv = gdk_rgb_convert_555_br;
/* I'm not 100% sure about the 24bpp tests - but testing will show*/
else if (bpp == 24 && depth == 24 && vtype == GDK_VISUAL_TRUE_COLOR &&
((mask_rgb && byte_order == GDK_LSB_FIRST) ||
(mask_bgr && byte_order == GDK_MSB_FIRST)))
conv = gdk_rgb_convert_888_lsb;
else if (bpp == 24 && depth == 24 && vtype == GDK_VISUAL_TRUE_COLOR &&
((mask_rgb && byte_order == GDK_MSB_FIRST) ||
(mask_bgr && byte_order == GDK_LSB_FIRST)))
conv = gdk_rgb_convert_888_msb;
#if G_BYTE_ORDER == G_BIG_ENDIAN
else if (bpp == 32 && depth == 24 && vtype == GDK_VISUAL_TRUE_COLOR &&
(mask_rgb && byte_order == GDK_LSB_FIRST))
conv = gdk_rgb_convert_0888_br;
else if (bpp == 32 && depth == 24 && vtype == GDK_VISUAL_TRUE_COLOR &&
(mask_rgb && byte_order == GDK_MSB_FIRST))
conv = gdk_rgb_convert_0888;
else if (bpp == 32 && depth == 24 && vtype == GDK_VISUAL_TRUE_COLOR &&
(mask_bgr && byte_order == GDK_MSB_FIRST))
conv = gdk_rgb_convert_8880_br;
#else
else if (bpp == 32 && depth == 24 && vtype == GDK_VISUAL_TRUE_COLOR &&
(mask_rgb && byte_order == GDK_MSB_FIRST))
conv = gdk_rgb_convert_0888_br;
else if (bpp == 32 && depth == 24 && vtype == GDK_VISUAL_TRUE_COLOR &&
(mask_rgb && byte_order == GDK_LSB_FIRST))
conv = gdk_rgb_convert_0888;
else if (bpp == 32 && depth == 24 && vtype == GDK_VISUAL_TRUE_COLOR &&
(mask_bgr && byte_order == GDK_LSB_FIRST))
conv = gdk_rgb_convert_8880_br;
#endif
else if (vtype == GDK_VISUAL_TRUE_COLOR && byte_order == GDK_LSB_FIRST)
{
conv = gdk_rgb_convert_truecolor_lsb;
conv_d = gdk_rgb_convert_truecolor_lsb_d;
}
else if (vtype == GDK_VISUAL_TRUE_COLOR && byte_order == GDK_MSB_FIRST)
{
conv = gdk_rgb_convert_truecolor_msb;
conv_d = gdk_rgb_convert_truecolor_msb_d;
}
else if (bpp == 8 &&
depth <= 8 &&
(vtype == GDK_VISUAL_PSEUDO_COLOR
#ifdef ENABLE_GRAYSCALE
|| vtype == GDK_VISUAL_GRAYSCALE
#endif
))
{
/* Mainly for Win32: use these conversion functions also for the
* explicitly (on user request) restricted palette versions of
* 256-color, i.e. depths 5, 6 and 7. On X11, such depths
* probably never occur.
*/
image_info->dith_default = TRUE;
conv = gdk_rgb_convert_8;
if (vtype != GDK_VISUAL_GRAYSCALE)
{
if (image_info->nred_shades == 6 &&
image_info->ngreen_shades == 6 &&
image_info->nblue_shades == 6)
conv_d = gdk_rgb_convert_8_d666;
else
conv_d = gdk_rgb_convert_8_d;
}
conv_indexed = gdk_rgb_convert_8_indexed;
conv_gray = gdk_rgb_convert_gray_cmap;
}
else if (bpp == 8 && depth == 8 && (vtype == GDK_VISUAL_STATIC_GRAY
#ifdef not_ENABLE_GRAYSCALE
|| vtype == GDK_VISUAL_GRAYSCALE
#endif
))
{
conv = gdk_rgb_convert_gray8;
conv_gray = gdk_rgb_convert_gray8_gray;
}
else if (bpp == 8 && depth < 8 && depth >= 2 &&
(vtype == GDK_VISUAL_STATIC_GRAY
|| vtype == GDK_VISUAL_GRAYSCALE))
{
conv = gdk_rgb_convert_gray4;
conv_d = gdk_rgb_convert_gray4_d;
}
else if (bpp == 8 && depth < 8 && depth >= 3)
{
conv = gdk_rgb_convert_4;
}
else if (bpp == 4 && depth <= 4 && depth >= 2 &&
(vtype == GDK_VISUAL_STATIC_GRAY
|| vtype == GDK_VISUAL_GRAYSCALE))
{
conv = gdk_rgb_convert_gray4_pack;
conv_d = gdk_rgb_convert_gray4_d_pack;
}
else if (bpp == 4 && depth == 4 &&
vtype == GDK_VISUAL_STATIC_COLOR)
conv = gdk_rgb_convert_4_pack;
if (!conv)
{
g_warning ("Visual type=%s depth=%d, image bpp=%d, %s first\n"
"is not supported by GdkRGB. Please submit a bug report\n"
"with the above values to bugzilla.gnome.org",
visual_names[vtype], depth, bpp,
byte_order == GDK_LSB_FIRST ? "lsb" : "msb");
exit (1);
}
if (conv_d == NULL)
conv_d = conv;
image_info->conv = conv;
image_info->conv_d = conv_d;
image_info->conv_32 = conv_32;
image_info->conv_32_d = conv_32_d;
image_info->conv_gray = conv_gray;
image_info->conv_gray_d = conv_gray_d;
image_info->conv_indexed = conv_indexed;
image_info->conv_indexed_d = conv_indexed_d;
}
static void
gdk_draw_rgb_image_core (GdkRgbInfo *image_info,
GdkDrawable *drawable,
GdkGC *gc,
gint x,
gint y,
gint width,
gint height,
guchar *buf,
gint pixstride,
gint rowstride,
GdkRgbConvFunc conv,
GdkRgbCmap *cmap,
gint xdith,
gint ydith)
{
gint y0, x0;
gint xs0, ys0;
GdkImage *image;
gint width1, height1;
guchar *buf_ptr;
if (image_info->bitmap)
{
if (image_info->own_gc == NULL)
{
GdkColor color;
image_info->own_gc = gdk_gc_new (drawable);
gdk_color_white (image_info->cmap, &color);
gdk_gc_set_foreground (image_info->own_gc, &color);
gdk_color_black (image_info->cmap, &color);
gdk_gc_set_background (image_info->own_gc, &color);
}
gc = image_info->own_gc;
}
for (y0 = 0; y0 < height; y0 += GDK_SCRATCH_IMAGE_HEIGHT)
{
height1 = MIN (height - y0, GDK_SCRATCH_IMAGE_HEIGHT);
for (x0 = 0; x0 < width; x0 += GDK_SCRATCH_IMAGE_WIDTH)
{
width1 = MIN (width - x0, GDK_SCRATCH_IMAGE_WIDTH);
buf_ptr = buf + y0 * rowstride + x0 * pixstride;
image = _gdk_image_get_scratch (width1, height1, image_info->visual->depth, &xs0, &ys0);
conv (image_info, image, xs0, ys0, width1, height1, buf_ptr, rowstride,
x + x0 + xdith, y + y0 + ydith, cmap);
#ifndef DONT_ACTUALLY_DRAW
gdk_draw_image (drawable, gc,
image, xs0, ys0, x + x0, y + y0, width1, height1);
#endif
}
}
}
static GdkRgbInfo *
gdk_rgb_get_info_from_drawable (GdkDrawable *drawable)
{
GdkColormap *cmap = gdk_drawable_get_colormap (drawable);
if (!cmap)
{
/* This guessing is required to maintain backward compatibility,
* but would otherwise be a bad thing
*/
gint depth = gdk_drawable_get_depth (drawable);
GdkColormap *rgb_cmap = gdk_rgb_get_colormap();
if (depth == gdk_colormap_get_visual (rgb_cmap)->depth)
cmap = rgb_cmap;
else
{
g_warning ("The gdk_draw_*_image require the drawable argument to\n"
"have a specified colormap. All windows have a colormap,\n"
"however, pixmaps only have colormap by default if they\n"
"were created with a non-NULL window argument. Otherwise\n"
"a colormap must be set on them with gdk_drawable_set_colormap");
return NULL;
}
}
return gdk_rgb_get_info_from_colormap (cmap);
}
void
gdk_draw_rgb_image (GdkDrawable *drawable,
GdkGC *gc,
gint x,
gint y,
gint width,
gint height,
GdkRgbDither dith,
guchar *rgb_buf,
gint rowstride)
{
GdkRgbInfo *image_info = gdk_rgb_get_info_from_drawable (drawable);
if (!image_info)
return;
if (dith == GDK_RGB_DITHER_NONE || (dith == GDK_RGB_DITHER_NORMAL &&
!image_info->dith_default))
gdk_draw_rgb_image_core (image_info, drawable, gc, x, y, width, height,
rgb_buf, 3, rowstride, image_info->conv, NULL,
0, 0);
else
gdk_draw_rgb_image_core (image_info, drawable, gc, x, y, width, height,
rgb_buf, 3, rowstride, image_info->conv_d, NULL,
0, 0);
}
void
gdk_draw_rgb_image_dithalign (GdkDrawable *drawable,
GdkGC *gc,
gint x,
gint y,
gint width,
gint height,
GdkRgbDither dith,
guchar *rgb_buf,
gint rowstride,
gint xdith,
gint ydith)
{
GdkRgbInfo *image_info = gdk_rgb_get_info_from_drawable (drawable);
if (!image_info)
return;
if (dith == GDK_RGB_DITHER_NONE || (dith == GDK_RGB_DITHER_NORMAL &&
!image_info->dith_default))
gdk_draw_rgb_image_core (image_info, drawable, gc, x, y, width, height,
rgb_buf, 3, rowstride, image_info->conv, NULL,
xdith, ydith);
else
gdk_draw_rgb_image_core (image_info, drawable, gc, x, y, width, height,
rgb_buf, 3, rowstride, image_info->conv_d, NULL,
xdith, ydith);
}
void
gdk_draw_rgb_32_image (GdkDrawable *drawable,
GdkGC *gc,
gint x,
gint y,
gint width,
gint height,
GdkRgbDither dith,
guchar *buf,
gint rowstride)
{
GdkRgbInfo *image_info = gdk_rgb_get_info_from_drawable (drawable);
if (!image_info)
return;
if (dith == GDK_RGB_DITHER_NONE || (dith == GDK_RGB_DITHER_NORMAL &&
!image_info->dith_default))
gdk_draw_rgb_image_core (image_info, drawable, gc, x, y, width, height,
buf, 4, rowstride,
image_info->conv_32, NULL, 0, 0);
else
gdk_draw_rgb_image_core (image_info, drawable, gc, x, y, width, height,
buf, 4, rowstride,
image_info->conv_32_d, NULL, 0, 0);
}
/**
* gdk_draw_rgb_32_image_dithalign:
* @drawable: a #GdkDrawable
* @gc: a #GdkGC
* @x: X coordinate on @drawable where image should go
* @y: Y coordinate on @drawable where image should go
* @width: width of area of image to draw
* @height: height of area of image to draw
* @dith: dithering mode
* @buf: RGB image data
* @rowstride: rowstride of RGB image data
* @xdith: X dither offset
* @ydith: Y dither offset
*
* Like gdk_draw_rgb_32_image(), but allows you to specify the dither
* offsets. See gdk_draw_rgb_image_dithalign() for more details.
*
**/
void
gdk_draw_rgb_32_image_dithalign (GdkDrawable *drawable,
GdkGC *gc,
gint x,
gint y,
gint width,
gint height,
GdkRgbDither dith,
guchar *buf,
gint rowstride,
gint xdith,
gint ydith)
{
GdkRgbInfo *image_info = gdk_rgb_get_info_from_drawable (drawable);
if (!image_info)
return;
if (dith == GDK_RGB_DITHER_NONE || (dith == GDK_RGB_DITHER_NORMAL &&
!image_info->dith_default))
gdk_draw_rgb_image_core (image_info, drawable, gc, x, y, width, height,
buf, 4, rowstride,
image_info->conv_32, NULL, xdith, ydith);
else
gdk_draw_rgb_image_core (image_info, drawable, gc, x, y, width, height,
buf, 4, rowstride,
image_info->conv_32_d, NULL, xdith, ydith);
}
static void
gdk_rgb_make_gray_cmap (GdkRgbInfo *info)
{
guint32 rgb[256];
gint i;
for (i = 0; i < 256; i++)
rgb[i] = (i << 16) | (i << 8) | i;
info->gray_cmap = gdk_rgb_cmap_new (rgb, 256);
}
void
gdk_draw_gray_image (GdkDrawable *drawable,
GdkGC *gc,
gint x,
gint y,
gint width,
gint height,
GdkRgbDither dith,
guchar *buf,
gint rowstride)
{
GdkRgbInfo *image_info = gdk_rgb_get_info_from_drawable (drawable);
if (!image_info)
return;
if (image_info->bpp == 1 &&
image_info->gray_cmap == NULL &&
(image_info->visual->type == GDK_VISUAL_PSEUDO_COLOR ||
image_info->visual->type == GDK_VISUAL_GRAYSCALE))
gdk_rgb_make_gray_cmap (image_info);
if (dith == GDK_RGB_DITHER_NONE || (dith == GDK_RGB_DITHER_NORMAL &&
!image_info->dith_default))
gdk_draw_rgb_image_core (image_info, drawable, gc, x, y, width, height,
buf, 1, rowstride,
image_info->conv_gray, NULL, 0, 0);
else
gdk_draw_rgb_image_core (image_info, drawable, gc, x, y, width, height,
buf, 1, rowstride,
image_info->conv_gray_d, NULL, 0, 0);
}
static GdkRgbCmapInfo *
gdk_rgb_cmap_get_info (GdkRgbCmap *cmap,
GdkRgbInfo *image_info)
{
GSList *tmp_list;
GdkRgbCmapInfo *cmap_info;
int i, j;
guint32 rgb;
/* We only need a LUT for pseudo-color and grayscale cmaps */
if (image_info->bpp != 1 ||
!(image_info->visual->type == GDK_VISUAL_PSEUDO_COLOR ||
image_info->visual->type == GDK_VISUAL_GRAYSCALE))
return NULL;
tmp_list = cmap->info_list;
while (tmp_list)
{
cmap_info = tmp_list->data;
if (cmap_info->image_info == image_info)
return cmap_info;
}
cmap_info = g_new (GdkRgbCmapInfo, 1);
cmap_info->image_info = image_info;
cmap_info->cmap = cmap;
for (i = 0; i < cmap->n_colors; i++)
{
rgb = cmap->colors[i];
j = ((rgb & 0xf00000) >> 12) |
((rgb & 0xf000) >> 8) |
((rgb & 0xf0) >> 4);
#ifdef VERBOSE
g_print ("%d %x %x %d\n", i, j, image_info->colorcube[j]);
#endif
cmap_info->lut[i] = image_info->colorcube[j];
}
cmap->info_list = g_slist_prepend (cmap->info_list, cmap_info);
image_info->cmap_info_list = g_slist_prepend (image_info->cmap_info_list, cmap_info);
return cmap_info;
}
GdkRgbCmap *
gdk_rgb_cmap_new (guint32 *colors, gint n_colors)
{
GdkRgbCmap *cmap;
g_return_val_if_fail (n_colors >= 0, NULL);
g_return_val_if_fail (n_colors <= 256, NULL);
cmap = g_new (GdkRgbCmap, 1);
cmap->n_colors = n_colors;
memcpy (cmap->colors, colors, n_colors * sizeof(guint32));
cmap->info_list = NULL;
return cmap;
}
void
gdk_rgb_cmap_free (GdkRgbCmap *cmap)
{
GSList *tmp_list;
tmp_list = cmap->info_list;
while (tmp_list)
{
GdkRgbCmapInfo *cmap_info = tmp_list->data;
cmap_info->image_info->cmap_info_list = g_slist_remove (cmap_info->image_info->cmap_info_list, cmap_info);
g_free (cmap_info);
}
g_slist_free (cmap->info_list);
g_free (cmap);
}
void
gdk_draw_indexed_image (GdkDrawable *drawable,
GdkGC *gc,
gint x,
gint y,
gint width,
gint height,
GdkRgbDither dith,
guchar *buf,
gint rowstride,
GdkRgbCmap *cmap)
{
GdkRgbInfo *image_info = gdk_rgb_get_info_from_drawable (drawable);
if (!image_info)
return;
if (dith == GDK_RGB_DITHER_NONE || (dith == GDK_RGB_DITHER_NORMAL &&
!image_info->dith_default))
gdk_draw_rgb_image_core (image_info, drawable, gc, x, y, width, height,
buf, 1, rowstride,
image_info->conv_indexed, cmap, 0, 0);
else
gdk_draw_rgb_image_core (image_info, drawable, gc, x, y, width, height,
buf, 1, rowstride,
image_info->conv_indexed_d, cmap, 0, 0);
}
gboolean
gdk_rgb_colormap_ditherable (GdkColormap *cmap)
{
GdkRgbInfo *image_info = gdk_rgb_get_info_from_colormap (cmap);
return (image_info->conv != image_info->conv_d);
}
gboolean
gdk_rgb_ditherable (void)
{
return gdk_rgb_colormap_ditherable (gdk_rgb_get_colormap ());
}
/**
* gdk_rgb_get_colormap:
*
* Returns the preferred colormap for rendering image data. Not a
* very useful function; historically, GDK could only render RGB image
* data to one colormap and visual, but in the current version it can
* render to any colormap and visual. So there's no need to call this
* function.
*
* Return value: the preferred colormap
**/
GdkColormap *
gdk_rgb_get_colormap (void)
{
static GdkColormap *cmap = NULL;
if (!cmap)
{
GdkRgbInfo *image_info = gdk_rgb_create_info (gdk_rgb_choose_visual (), NULL);
cmap = image_info->cmap;
}
return cmap;
}
GdkVisual *
gdk_rgb_get_visual (void)
{
return gdk_colormap_get_visual (gdk_rgb_get_colormap ());
}