gtk/gdk/gdkrgb.c
Elliot Lee 060978e069 I submitted this patch twice to gtk-devel-list, and received no comments,
I submitted this patch twice to gtk-devel-list, and received no comments, so
am committing it.  Although not exhaustively tested, I have been using this
gtk+ for a week w/o problems, and I did read the code to ensure that nothing
ever writes to these data structures. If by chance people encounter SEGV's in
gtk+ code that is setting values in global data structures, this patch could
be a possible culprit.

1998-11-30  Elliot Lee  <sopwith@cuc.ml.org>

	* {gdk,gtk}/*.c: Make read-only data structures "static const" to
	allow them to be shared, mainly including (but not limited to) the
	GtkTypeInfo structures for each class.

	* gtk/gtkfilesel.c: Add /net to the "leave me alone" directory listing.
1998-11-30 19:07:15 +00:00

3184 lines
135 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 Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* For more information on GdkRgb, see http://www.levien.com/gdkrgb/
Raph Levien <raph@acm.org>
*/
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#define ENABLE_GRAYSCALE
#ifdef GDK_RGB_STANDALONE
/* Compiling as a standalone module (i.e. with Gtk 1.0) */
/* gtk/gtk.h is already included in gdkrgbstub.c */
#include "config.h"
#include <gdk/gdkprivate.h>
#else
/* Compiling as a part of Gtk 1.1 or later */
#include "../config.h"
#include "gdk.h"
#include "gdkprivate.h"
#endif
#include "gdkrgb.h"
typedef struct _GdkRgbInfo GdkRgbInfo;
typedef void (*GdkRgbConvFunc) (GdkImage *image,
gint x0, gint y0,
gint width, gint height,
guchar *buf, int rowstride,
gint x_align, gint y_align,
GdkRgbCmap *cmap);
/* Some of these fields should go, as they're not being used at all.
Globals should generally migrate into here - it's very likely that
we'll want to run more than one GdkRgbInfo context at the same time
(i.e. some but not all windows have privately installed
colormaps). */
struct _GdkRgbInfo
{
GdkVisual *visual;
GdkColormap *cmap;
gulong *color_pixels;
gulong *gray_pixels;
gulong *reserved_pixels;
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;
};
static gboolean gdk_rgb_install_cmap = FALSE;
static gint gdk_rgb_min_colors = 5 * 5 * 5;
static gboolean gdk_rgb_verbose = FALSE;
#define IMAGE_WIDTH 256
#define STAGE_ROWSTRIDE (IMAGE_WIDTH * 3)
#define IMAGE_HEIGHT 64
#define N_IMAGES 6
static GdkRgbInfo *image_info = NULL;
static GdkImage *static_image[N_IMAGES];
static gint static_image_idx;
static guchar *colorcube;
static guchar *colorcube_d;
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 (gulong *pixels, gint nr, gint ng, gint nb)
{
guchar rt[16], gt[16], bt[16];
gint i;
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++)
{
colorcube[i] = pixels[rt[i >> 8] + gt[(i >> 4) & 0x0f] + bt[i & 0x0f]];
#ifdef VERBOSE
g_print ("%03x %02x %x %x %x\n", i, 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 (gulong *pixels, gint nr, gint ng, gint nb)
{
gint r, g, b;
gint i;
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);
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 (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 (nr * ng * nb < gdk_rgb_min_colors)
return FALSE;
if (image_info->cmap_alloced)
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 (!gdk_rgb_install_cmap)
/* 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_color_alloc (cmap, &color))
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
/* This should be a raw XAllocColor call */
if (!gdk_color_alloc (cmap, &color))
{
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 (pixels, nr, ng, nb);
gdk_rgb_make_colorcube_d (pixels, nr, ng, nb);
return TRUE;
}
/* Return TRUE on success. */
static gboolean
gdk_rgb_do_colormaps (void)
{
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 = sizeof(sizes) / (3 * sizeof(gint));
gint i;
for (i = 0; i < n_sizes; i++)
if (gdk_rgb_try_colormap (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 (void)
{
int i;
GdkColor color;
GdkColormap *cmap;
if (image_info->cmap_alloced)
cmap = image_info->cmap;
else
cmap = gdk_colormap_get_system ();
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_color_alloc (cmap, &color);
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;
static const gchar* visual_names[] =
{
"static gray",
"grayscale",
"static color",
"pseudo color",
"true color",
"direct color",
};
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 0x%x, type = %s, depth = %d, %x:%x:%x%s; score=%x\n",
(gint)(((GdkVisualPrivate *)visual)->xvisual->visualid),
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 void
gdk_rgb_choose_visual (void)
{
GList *visuals;
guint32 score, best_score;
GdkVisual *visual, *best_visual;
visuals = gdk_list_visuals ();
best_visual = visuals->data;
best_score = gdk_rgb_score_visual (best_visual);
visuals = visuals->next;
while (visuals)
{
visual = visuals->data;
score = gdk_rgb_score_visual (visual);
if (score > best_score)
{
best_score = score;
best_visual = visual;
}
visuals = visuals->next;
}
image_info->visual = best_visual;
}
static void gdk_rgb_select_conv (GdkImage *image);
static void
gdk_rgb_set_gray_cmap (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_color_alloc (cmap, &color);
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. */
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;
colorcube[i] = pixels[gray];
}
}
void
gdk_rgb_init (void)
{
gint i;
static const gint byte_order[1] = { 1 };
/* 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
if (image_info == NULL)
{
image_info = g_new0 (GdkRgbInfo, 1);
image_info->visual = NULL;
image_info->cmap = NULL;
image_info->color_pixels = NULL;
image_info->gray_pixels = NULL;
image_info->reserved_pixels = 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;
gdk_rgb_choose_visual ();
if ((image_info->visual->type == GDK_VISUAL_PSEUDO_COLOR ||
image_info->visual->type == GDK_VISUAL_STATIC_COLOR) &&
image_info->visual->depth < 8 &&
image_info->visual->depth >= 3)
{
image_info->cmap = gdk_colormap_get_system ();
gdk_rgb_colorcube_222 ();
}
else if (image_info->visual->type == GDK_VISUAL_PSEUDO_COLOR)
{
if (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->cmap = gdk_colormap_new (image_info->visual, FALSE);
image_info->cmap_alloced = TRUE;
gdk_rgb_do_colormaps ();
}
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_alloced)
image_info->cmap = gdk_colormap_get_system ();
}
#ifdef ENABLE_GRAYSCALE
else if (image_info->visual->type == GDK_VISUAL_GRAYSCALE)
{
image_info->cmap = gdk_colormap_new (image_info->visual, FALSE);
gdk_rgb_set_gray_cmap (image_info->cmap);
image_info->cmap_alloced = TRUE;
}
#endif
else
{
/* 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_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);
for (i = 0; i < N_IMAGES; i++)
if (image_info->bitmap)
/* Use malloc() instead of g_malloc since X will free() this mem */
static_image[i] = gdk_image_new_bitmap (image_info->visual,
malloc (IMAGE_WIDTH * IMAGE_HEIGHT >> 3),
IMAGE_WIDTH, IMAGE_HEIGHT);
else
static_image[i] = gdk_image_new (GDK_IMAGE_FASTEST,
image_info->visual,
IMAGE_WIDTH, IMAGE_HEIGHT);
image_info->bpp = static_image[0]->bpp;
gdk_rgb_select_conv (static_image[0]);
}
}
/* convert an rgb value into an X pixel code */
gulong
gdk_rgb_xpixel_from_rgb (guint32 rgb)
{
gulong pixel = 0;
if (image_info->bitmap)
{
return ((rgb & 0xff0000) >> 16) +
((rgb & 0xff00) >> 7) +
(rgb & 0xff) > 510;
}
else if (image_info->visual->type == GDK_VISUAL_PSEUDO_COLOR)
pixel = colorcube[((rgb & 0xf00000) >> 12) |
((rgb & 0xf000) >> 8) |
((rgb & 0xf0) >> 4)];
else if (image_info->visual->depth < 8 &&
image_info->visual->type == GDK_VISUAL_STATIC_COLOR)
{
pixel = colorcube_d[((rgb & 0x800000) >> 17) |
((rgb & 0x8000) >> 12) |
((rgb & 0x80) >> 7)];
}
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 = (((((rgb & 0xff0000) >> 16) >>
(8 - image_info->visual->red_prec)) <<
image_info->visual->red_shift) +
((((rgb & 0xff00) >> 8) >>
(8 - image_info->visual->green_prec)) <<
image_info->visual->green_shift) +
(((rgb & 0xff) >>
(8 - 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 = ((rgb & 0xff0000) >> 16) +
((rgb & 0xff00) >> 7) +
(rgb & 0xff);
return gray >> (10 - image_info->visual->depth);
}
return pixel;
}
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);
}
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
#define HAIRY_CONVERT_8
#endif
#ifdef HAIRY_CONVERT_8
static void
gdk_rgb_convert_8 (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;
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 (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] = 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 },
{ 36, 2, 38, 11, 24, 36, 54, 22, 62, 47, 25, 8, 28, 45, 16, 38, 12, 43, 9, 37, 49, 3, 23, 52, 18, 30, 50, 33, 19, 42, 49, 26, 6, 40, 47, 35, 63, 38, 50, 33, 60, 26, 36, 47, 24, 57, 6, 26, 39, 63, 19, 44, 14, 46, 61, 9, 50, 30, 45, 23, 10, 50, 44, 8, 31, 54, 6, 46, 36, 4, 30, 54, 8, 52, 22, 41, 4, 60, 40, 0, 58, 24, 45, 10, 37, 1, 48, 30, 56, 17, 38, 48, 24, 47, 19, 39, 14, 8, 45, 32, 2, 34, 27, 44, 4, 52, 11, 56, 31, 21, 40, 19, 44, 51, 2, 63, 46, 58, 36, 43, 14, 5, 50, 38, 14, 56, 40, 23 },
{ 61, 46, 32, 63, 54, 1, 14, 34, 12, 40, 18, 49, 37, 10, 61, 30, 51, 24, 60, 7, 29, 40, 62, 11, 46, 58, 6, 56, 24, 10, 34, 52, 21, 59, 16, 3, 27, 5, 20, 46, 9, 40, 7, 62, 2, 30, 53, 15, 48, 10, 28, 35, 54, 6, 21, 34, 18, 55, 7, 40, 57, 19, 26, 60, 41, 13, 24, 51, 19, 61, 9, 25, 34, 15, 63, 11, 45, 17, 20, 47, 33, 8, 31, 62, 43, 26, 53, 7, 24, 59, 0, 13, 55, 4, 62, 27, 51, 31, 63, 15, 58, 7, 54, 14, 46, 22, 28, 43, 12, 63, 8, 54, 5, 17, 39, 33, 15, 10, 27, 17, 47, 34, 19, 45, 27, 12, 33, 17 },
{ 5, 28, 21, 7, 17, 48, 42, 58, 23, 4, 63, 14, 55, 21, 34, 5, 19, 0, 45, 17, 52, 15, 25, 32, 0, 22, 40, 13, 45, 62, 18, 0, 43, 11, 33, 55, 30, 42, 57, 19, 51, 31, 22, 43, 18, 45, 34, 0, 43, 31, 56, 3, 23, 40, 59, 0, 44, 13, 48, 35, 2, 32, 46, 0, 21, 48, 35, 3, 40, 32, 43, 59, 0, 48, 33, 26, 53, 36, 55, 12, 51, 16, 55, 5, 18, 29, 11, 39, 51, 19, 45, 31, 42, 21, 35, 6, 22, 47, 10, 38, 23, 50, 20, 36, 0, 60, 38, 4, 50, 35, 48, 34, 24, 57, 9, 53, 28, 48, 61, 0, 56, 24, 53, 3, 63, 6, 42, 57 },
{ 13, 53, 45, 40, 58, 27, 6, 16, 38, 51, 33, 30, 43, 2, 47, 56, 40, 50, 33, 57, 27, 5, 47, 42, 60, 36, 16, 54, 28, 4, 37, 57, 28, 51, 22, 8, 45, 14, 6, 39, 0, 54, 11, 59, 28, 12, 50, 21, 61, 13, 19, 38, 49, 11, 25, 37, 58, 29, 22, 63, 14, 56, 12, 53, 30, 63, 9, 57, 26, 12, 47, 16, 23, 39, 50, 6, 31, 2, 25, 6, 28, 41, 36, 22, 50, 57, 42, 3, 34, 8, 28, 61, 11, 50, 16, 54, 41, 0, 55, 43, 5, 29, 41, 63, 25, 16, 53, 18, 26, 10, 21, 0, 61, 30, 41, 22, 3, 38, 20, 39, 29, 8, 41, 16, 36, 52, 22, 19 },
{ 55, 34, 0, 25, 10, 32, 56, 44, 28, 0, 57, 7, 26, 53, 23, 8, 13, 35, 22, 12, 36, 60, 20, 8, 14, 29, 48, 2, 41, 49, 23, 13, 39, 7, 48, 58, 25, 53, 34, 62, 28, 16, 48, 4, 37, 56, 27, 5, 36, 52, 46, 7, 62, 33, 52, 11, 17, 53, 5, 28, 41, 24, 38, 17, 5, 39, 20, 45, 15, 56, 5, 38, 60, 8, 14, 57, 21, 48, 62, 39, 59, 13, 1, 60, 9, 32, 16, 63, 44, 25, 52, 15, 36, 2, 60, 29, 12, 33, 25, 17, 59, 45, 13, 8, 49, 32, 6, 40, 59, 29, 45, 37, 13, 47, 6, 55, 30, 45, 9, 52, 13, 59, 25, 47, 32, 1, 49, 30 },
{ 9, 39, 14, 61, 49, 37, 3, 20, 50, 13, 41, 19, 46, 17, 38, 59, 28, 62, 4, 44, 54, 1, 34, 51, 55, 7, 63, 32, 21, 8, 56, 31, 62, 19, 36, 1, 41, 17, 24, 12, 42, 35, 25, 52, 20, 8, 44, 59, 25, 2, 22, 42, 16, 29, 4, 46, 20, 36, 43, 9, 51, 8, 49, 26, 58, 33, 54, 1, 37, 29, 52, 20, 27, 45, 19, 35, 42, 16, 10, 32, 20, 49, 46, 27, 40, 4, 47, 22, 13, 55, 4, 47, 26, 44, 23, 40, 58, 19, 48, 13, 31, 2, 57, 34, 42, 19, 61, 32, 14, 55, 5, 51, 26, 19, 58, 16, 49, 14, 62, 5, 33, 44, 21, 7, 60, 26, 11, 41 },
{ 62, 24, 47, 29, 8, 19, 53, 11, 60, 24, 32, 61, 4, 55, 31, 2, 49, 16, 39, 9, 31, 24, 43, 17, 26, 38, 11, 25, 58, 43, 12, 35, 3, 46, 15, 32, 63, 4, 49, 56, 2, 60, 10, 32, 63, 17, 39, 12, 55, 30, 57, 9, 48, 55, 39, 24, 60, 2, 58, 31, 19, 61, 34, 3, 42, 11, 22, 46, 7, 61, 10, 42, 3, 55, 32, 1, 58, 28, 44, 54, 4, 34, 23, 15, 56, 20, 37, 58, 6, 30, 38, 18, 63, 9, 32, 5, 51, 3, 62, 37, 52, 18, 39, 23, 3, 51, 9, 47, 1, 23, 43, 15, 60, 35, 11, 40, 1, 36, 31, 26, 57, 2, 37, 54, 18, 44, 58, 16 },
{ 5, 51, 3, 33, 43, 62, 21, 42, 35, 9, 48, 15, 36, 10, 22, 42, 20, 46, 26, 56, 50, 12, 59, 3, 48, 19, 45, 53, 1, 27, 47, 17, 52, 24, 56, 11, 51, 21, 37, 30, 20, 46, 14, 41, 1, 47, 33, 7, 41, 17, 35, 27, 20, 1, 14, 54, 26, 33, 18, 47, 1, 44, 14, 59, 16, 52, 28, 18, 49, 31, 25, 34, 63, 13, 51, 24, 9, 50, 3, 23, 38, 63, 7, 52, 29, 46, 11, 33, 50, 22, 57, 36, 1, 57, 49, 17, 39, 28, 9, 35, 6, 27, 53, 15, 55, 30, 24, 58, 36, 41, 11, 52, 32, 3, 44, 25, 62, 23, 51, 15, 42, 22, 50, 10, 39, 4, 31, 35 },
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{ 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 (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;
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 (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;
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 (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;
lut = cmap->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 (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 (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 static_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 (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 static_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 (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 (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 (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 (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 (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 (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 (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 (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 & 0x18) << 10) |
((b & 0xf8) << 5);
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_888_msb (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 (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 (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 (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 (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 (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 (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 (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 (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 (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 (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;
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;
}
}
/* This actually works for depths from 3 to 7 */
static void
gdk_rgb_convert_gray4 (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 (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;
for (x = 0; x < width; x += 2)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
pix0 = (g + ((b + r) >> 1)) >> shift;
r = *bp2++;
g = *bp2++;
b = *bp2++;
pix1 = (g + ((b + r) >> 1)) >> shift;
obptr[0] = (pix0 << 4) | pix1;
obptr++;
}
if (width & 1)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
pix0 = (g + ((b + r) >> 1)) >> shift;
obptr[0] = (pix0 << 4);
}
bptr += rowstride;
obuf += bpl;
}
}
/* This actually works for depths from 3 to 7 */
static void
gdk_rgb_convert_gray4_d (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 (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)];
for (x = 0; x < width; x += 2)
{
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;
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[0] = (pix0 << 4) | pix1;
obptr++;
}
if (width & 1)
{
r = *bp2++;
g = *bp2++;
b = *bp2++;
gray = (g + ((b + r) >> 1)) >> 1;
gray += (dmp[(x_align + x + 1) & (DM_WIDTH - 1)] << 2) >> prec;
pix0 = (gray - (gray >> prec)) >> right;
obptr[0] = (pix0 << 4);
}
bptr += rowstride;
obuf += bpl;
}
}
static void
gdk_rgb_convert_1 (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 (void)
{
if (image_info->stage_buf == NULL)
image_info->stage_buf = g_malloc (IMAGE_HEIGHT * STAGE_ROWSTRIDE);
return image_info->stage_buf;
}
/* This is slow. Speed me up, please. */
static void
gdk_rgb_32_to_stage (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 ();
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 (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 (buf, rowstride, width, height);
(*image_info->conv) (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 (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 (buf, rowstride, width, height);
(*image_info->conv_d) (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 (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 ();
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 (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 (buf, rowstride, width, height);
(*image_info->conv) (image, x0, y0, width, height,
image_info->stage_buf, STAGE_ROWSTRIDE,
x_align, y_align, cmap);
}
static void
gdk_rgb_convert_gray_generic_d (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 (buf, rowstride, width, height);
(*image_info->conv_d) (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 (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, x0, y0, width, height,
buf, rowstride,
x_align, y_align, image_info->gray_cmap);
}
#if 0
static void
gdk_rgb_convert_gray_cmap_d (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, 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 (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 ();
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 (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 (buf, rowstride, width, height, cmap);
(*image_info->conv) (image, x0, y0, width, height,
image_info->stage_buf, STAGE_ROWSTRIDE,
x_align, y_align, cmap);
}
static void
gdk_rgb_convert_indexed_generic_d (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 (buf, rowstride, width, height, cmap);
(*image_info->conv_d) (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 (GdkImage *image)
{
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 = ((GdkImagePrivate *)image)->ximage->bits_per_pixel;
byte_order = image->byte_order;
if (gdk_rgb_verbose)
g_print ("Chose visual 0x%x, image bpp=%d, %s first\n",
(gint)(((GdkVisualPrivate *)image_info->visual)->xvisual->visualid),
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
))
{
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;
}
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 gint horiz_idx;
static gint horiz_y = IMAGE_HEIGHT;
static gint vert_idx;
static gint vert_x = IMAGE_WIDTH;
static gint tile_idx;
static gint tile_x = IMAGE_WIDTH;
static gint tile_y1 = IMAGE_HEIGHT;
static gint tile_y2 = IMAGE_HEIGHT;
#ifdef VERBOSE
static gint sincelast;
#endif
/* Defining NO_FLUSH can cause inconsistent screen updates, but is useful
for performance evaluation. */
#undef NO_FLUSH
static gint
gdk_rgb_alloc_scratch_image (void)
{
if (static_image_idx == N_IMAGES)
{
#ifndef NO_FLUSH
gdk_flush ();
#endif
#ifdef VERBOSE
g_print ("flush, %d puts since last flush\n", sincelast);
sincelast = 0;
#endif
static_image_idx = 0;
horiz_y = IMAGE_HEIGHT;
vert_x = IMAGE_WIDTH;
tile_x = IMAGE_WIDTH;
tile_y1 = tile_y2 = IMAGE_HEIGHT;
}
return static_image_idx++;
}
static GdkImage *
gdk_rgb_alloc_scratch (gint width, gint height, gint *x0, gint *y0)
{
GdkImage *image;
gint idx;
if (width >= (IMAGE_WIDTH >> 1))
{
if (height >= (IMAGE_HEIGHT >> 1))
{
idx = gdk_rgb_alloc_scratch_image ();
*x0 = 0;
*y0 = 0;
}
else
{
if (height + horiz_y > IMAGE_HEIGHT)
{
horiz_idx = gdk_rgb_alloc_scratch_image ();
horiz_y = 0;
}
idx = horiz_idx;
*x0 = 0;
*y0 = horiz_y;
horiz_y += height;
}
}
else
{
if (height >= (IMAGE_HEIGHT >> 1))
{
if (width + vert_x > IMAGE_WIDTH)
{
vert_idx = gdk_rgb_alloc_scratch_image ();
vert_x = 0;
}
idx = vert_idx;
*x0 = vert_x;
*y0 = 0;
/* using 3 and -4 would be slightly more efficient on 32-bit machines
with > 1bpp displays */
vert_x += (width + 7) & -8;
}
else
{
if (width + tile_x > IMAGE_WIDTH)
{
tile_y1 = tile_y2;
tile_x = 0;
}
if (height + tile_y1 > IMAGE_HEIGHT)
{
tile_idx = gdk_rgb_alloc_scratch_image ();
tile_x = 0;
tile_y1 = 0;
tile_y2 = 0;
}
if (height + tile_y1 > tile_y2)
tile_y2 = height + tile_y1;
idx = tile_idx;
*x0 = tile_x;
*y0 = tile_y1;
tile_x += (width + 7) & -8;
}
}
image = static_image[idx];
#ifdef VERBOSE
g_print ("index %d, x %d, y %d (%d x %d)\n", idx, *x0, *y0, width, height);
sincelast++;
#endif
return image;
}
static void
gdk_draw_rgb_image_core (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 += IMAGE_HEIGHT)
{
height1 = MIN (height - y0, IMAGE_HEIGHT);
for (x0 = 0; x0 < width; x0 += IMAGE_WIDTH)
{
width1 = MIN (width - x0, IMAGE_WIDTH);
buf_ptr = buf + y0 * rowstride + x0 * pixstride;
image = gdk_rgb_alloc_scratch (width1, height1, &xs0, &ys0);
conv (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
}
}
}
void
gdk_draw_rgb_image (GdkDrawable *drawable,
GdkGC *gc,
gint x,
gint y,
gint width,
gint height,
GdkRgbDither dith,
guchar *rgb_buf,
gint rowstride)
{
if (dith == GDK_RGB_DITHER_NONE || (dith == GDK_RGB_DITHER_NORMAL &&
!image_info->dith_default))
gdk_draw_rgb_image_core (drawable, gc, x, y, width, height,
rgb_buf, 3, rowstride, image_info->conv, NULL,
0, 0);
else
gdk_draw_rgb_image_core (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)
{
if (dith == GDK_RGB_DITHER_NONE || (dith == GDK_RGB_DITHER_NORMAL &&
!image_info->dith_default))
gdk_draw_rgb_image_core (drawable, gc, x, y, width, height,
rgb_buf, 3, rowstride, image_info->conv, NULL,
xdith, ydith);
else
gdk_draw_rgb_image_core (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)
{
if (dith == GDK_RGB_DITHER_NONE || (dith == GDK_RGB_DITHER_NORMAL &&
!image_info->dith_default))
gdk_draw_rgb_image_core (drawable, gc, x, y, width, height,
buf, 4, rowstride,
image_info->conv_32, NULL, 0, 0);
else
gdk_draw_rgb_image_core (drawable, gc, x, y, width, height,
buf, 4, rowstride,
image_info->conv_32_d, NULL, 0, 0);
}
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)
{
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 (drawable, gc, x, y, width, height,
buf, 1, rowstride,
image_info->conv_gray, NULL, 0, 0);
else
gdk_draw_rgb_image_core (drawable, gc, x, y, width, height,
buf, 1, rowstride,
image_info->conv_gray_d, NULL, 0, 0);
}
GdkRgbCmap *
gdk_rgb_cmap_new (guint32 *colors, gint n_colors)
{
GdkRgbCmap *cmap;
int i, j;
guint32 rgb;
g_return_val_if_fail (n_colors >= 0, NULL);
g_return_val_if_fail (n_colors <= 256, NULL);
cmap = g_new (GdkRgbCmap, 1);
memcpy (cmap->colors, colors, n_colors * sizeof(guint32));
if (image_info->bpp == 1 &&
(image_info->visual->type == GDK_VISUAL_PSEUDO_COLOR ||
image_info->visual->type == GDK_VISUAL_GRAYSCALE))
for (i = 0; i < n_colors; i++)
{
rgb = colors[i];
j = ((rgb & 0xf00000) >> 12) |
((rgb & 0xf000) >> 8) |
((rgb & 0xf0) >> 4);
#ifdef VERBOSE
g_print ("%d %x %x %d\n", i, j, colorcube[j]);
#endif
cmap->lut[i] = colorcube[j];
}
return cmap;
}
void
gdk_rgb_cmap_free (GdkRgbCmap *cmap)
{
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)
{
if (dith == GDK_RGB_DITHER_NONE || (dith == GDK_RGB_DITHER_NORMAL &&
!image_info->dith_default))
gdk_draw_rgb_image_core (drawable, gc, x, y, width, height,
buf, 1, rowstride,
image_info->conv_indexed, cmap, 0, 0);
else
gdk_draw_rgb_image_core (drawable, gc, x, y, width, height,
buf, 1, rowstride,
image_info->conv_indexed_d, cmap, 0, 0);
}
gboolean
gdk_rgb_ditherable (void)
{
return (image_info->conv != image_info->conv_d);
}
GdkColormap *
gdk_rgb_get_cmap (void)
{
gdk_rgb_init ();
return image_info->cmap;
}
GdkVisual *
gdk_rgb_get_visual (void)
{
gdk_rgb_init ();
return image_info->visual;
}