gtk/gdk/linux-fb/gdkcolor-fb.c

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/* 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
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* 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.
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*
* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* 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 <time.h>
#include <sys/ioctl.h>
#include <string.h>
#include <stdlib.h>
#include "gdkcolor.h"
#include "gdkprivate-fb.h"
#define GDK_COLORMAP_PRIVATE_DATA(cmap) ((GdkColormapPrivateFB *) GDK_COLORMAP (cmap)->windowing_data)
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static gint gdk_colormap_match_color (GdkColormap *cmap,
GdkColor *color,
const gchar *available);
static gpointer parent_class;
static void
gdk_colormap_finalize (GObject *object)
{
GdkColormap *colormap = GDK_COLORMAP (object);
GdkColormapPrivateFB *private = GDK_COLORMAP_PRIVATE_DATA (colormap);
if (private->hash)
g_hash_table_destroy (private->hash);
g_free (private->info);
g_free (colormap->colors);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gdk_colormap_init (GdkColormap *colormap)
{
GdkColormapPrivateFB *private;
private = g_new (GdkColormapPrivateFB, 1);
colormap->windowing_data = private;
colormap->size = 0;
colormap->colors = NULL;
}
static void
gdk_colormap_class_init (GdkColormapClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gdk_colormap_finalize;
}
GType
gdk_colormap_get_type (void)
{
static GType object_type = 0;
if (!object_type)
{
static const GTypeInfo object_info =
{
sizeof (GdkColormapClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gdk_colormap_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GdkColormap),
0, /* n_preallocs */
(GInstanceInitFunc) gdk_colormap_init,
};
object_type = g_type_register_static (G_TYPE_OBJECT,
"GdkColormap",
&object_info,
0);
}
return object_type;
}
GdkColormap *
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gdk_colormap_new (GdkVisual *visual,
gint private_cmap)
{
GdkColormap *colormap;
GdkColormapPrivateFB *private;
GdkFBDisplay *fbd;
int i;
g_return_val_if_fail (visual != NULL, NULL);
colormap = g_object_new (gdk_colormap_get_type (), NULL);
private = GDK_COLORMAP_PRIVATE_DATA (colormap);
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colormap->visual = visual;
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fbd = gdk_display;
private->hash = NULL;
colormap->size = visual->colormap_size;
colormap->colors = NULL;
switch (visual->type)
{
case GDK_VISUAL_STATIC_GRAY:
case GDK_VISUAL_STATIC_COLOR:
case GDK_VISUAL_GRAYSCALE:
case GDK_VISUAL_PSEUDO_COLOR:
private->info = g_new0 (GdkColorInfo, colormap->size);
colormap->colors = g_new (GdkColor, colormap->size);
private->hash = g_hash_table_new ((GHashFunc) gdk_color_hash,
(GEqualFunc) gdk_color_equal);
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if (private_cmap)
{
guint16 red[256], green[256], blue[256];
struct fb_cmap fbc = {0, 256};
fbc.red = red;
fbc.green = green;
fbc.blue = blue;
if (ioctl (fbd->fd, FBIOGETCMAP, &fbc))
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g_error("ioctl(FBIOGETCMAP) failed");
for (i = 0; i < colormap->size; i++)
{
colormap->colors[i].pixel = i;
colormap->colors[i].red = red[i];
colormap->colors[i].green = green[i];
colormap->colors[i].blue = blue[i];
}
gdk_colormap_change (colormap, colormap->size);
}
break;
case GDK_VISUAL_DIRECT_COLOR:
g_error("NYI");
#if 0
colormap->colors = g_new (GdkColor, colormap->size);
size = 1 << visual->red_prec;
for (i = 0; i < size; i++)
colormap->colors[i].red = i * 65535 / (size - 1);
size = 1 << visual->green_prec;
for (i = 0; i < size; i++)
colormap->colors[i].green = i * 65535 / (size - 1);
size = 1 << visual->blue_prec;
for (i = 0; i < size; i++)
colormap->colors[i].blue = i * 65535 / (size - 1);
gdk_colormap_change (colormap, colormap->size);
#endif
break;
default:
g_assert_not_reached ();
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case GDK_VISUAL_TRUE_COLOR:
break;
}
return colormap;
}
#define MIN_SYNC_TIME 2
void
gdk_colormap_sync (GdkColormap *colormap,
gboolean force)
{
}
GdkColormap*
gdk_colormap_get_system (void)
{
static GdkColormap *colormap = NULL;
if (!colormap)
{
guint16 red[256], green[256], blue[256];
struct fb_cmap fbc = {0, 256};
int i, r, g, b;
GdkVisual *visual = gdk_visual_get_system ();
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if (visual->type == GDK_VISUAL_GRAYSCALE
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|| visual->type == GDK_VISUAL_PSEUDO_COLOR)
{
fbc.red = red;
fbc.green = green;
fbc.blue = blue;
switch(visual->type)
{
case GDK_VISUAL_GRAYSCALE:
for(i = 0; i < 256; i++)
red[i] = green[i] = blue[i] = i << 8;
i--;
red[i] = green[i] = blue[i] = 65535; /* Make it a true white */
break;
case GDK_VISUAL_PSEUDO_COLOR:
/* Color cube stolen from gdkrgb upon advice from Owen */
for(i = r = 0; r < 6; r++)
for(g = 0; g < 6; g++)
for(b = 0; b < 6; b++)
{
red[i] = r * 65535 / 5;
green[i] = g * 65535 / 5;
blue[i] = b * 65535 / 5;
i++;
}
g_assert (i == 216);
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/* Fill in remaining space with grays */
for(i = 216; i < 256; i++)
{
red[i] = green[i] = blue[i] =
(i - 216) * 40;
}
/* Real white */
red[255] = green[255] = blue[255] = 65535;
break;
default:
break;
}
ioctl (gdk_display->fd, FBIOPUTCMAP, &fbc);
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}
colormap = gdk_colormap_new (visual, TRUE);
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}
return colormap;
}
gint
gdk_colormap_get_system_size (void)
{
return 1 << (gdk_display->modeinfo.bits_per_pixel);
}
void
gdk_colormap_change (GdkColormap *colormap,
gint ncolors)
{
guint16 red[256], green[256], blue[256];
struct fb_cmap fbc = {0,256};
GdkColormapPrivateFB *private;
int i;
g_return_if_fail (colormap != NULL);
fbc.red = red;
fbc.green = green;
fbc.blue = blue;
private = GDK_COLORMAP_PRIVATE_DATA (colormap);
switch (colormap->visual->type)
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{
case GDK_VISUAL_GRAYSCALE:
for(i = 0; i < ncolors; i++)
{
red[i] = green[i] = blue[i] =
(colormap->colors[i].red +
colormap->colors[i].green +
colormap->colors[i].blue)/3;
}
ioctl (gdk_display->fd, FBIOPUTCMAP, &fbc);
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break;
case GDK_VISUAL_PSEUDO_COLOR:
for (i = 0; i < ncolors; i++)
{
red[i] = colormap->colors[i].red;
green[i] = colormap->colors[i].green;
blue[i] = colormap->colors[i].blue;
}
ioctl (gdk_display->fd, FBIOPUTCMAP, &fbc);
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break;
default:
break;
}
}
gboolean
gdk_color_parse (const gchar *spec,
GdkColor *color)
{
char aline[512];
FILE *fh;
g_return_val_if_fail(spec, FALSE);
g_return_val_if_fail(color, FALSE);
if (spec[0] == '#')
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{
if (strlen(spec) == 7)
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{
guint num;
sscanf (spec + 1, "%x", &num);
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color->red = (num & 0xFF0000) >> 8;
color->green = (num & 0xFF00);
color->blue = (num & 0xFF) << 8;
}
else if (strlen(spec) == 13)
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{
char s1[5], s2[5], s3[5];
g_snprintf (s1, sizeof(s1), spec + 1);
g_snprintf (s2, sizeof(s2), spec + 5);
g_snprintf (s3, sizeof(s3), spec + 9);
if (!sscanf(s1, "%hx", &color->red))
g_error ("sscanf failed");
if (!sscanf(s2, "%hx", &color->green))
g_error ("sscanf failed");
if (!sscanf (s3, "%hx", &color->blue))
g_error ("sscanf failed");
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}
else
{
g_warning ("Couldn't parse color specifier `%s'", spec);
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return FALSE;
}
return TRUE;
}
else
{
fh = fopen ("/usr/lib/X11/rgb.txt", "r");
if (!fh)
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return FALSE;
while(fgets (aline, sizeof(aline), fh))
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{
int red, green, blue;
char *ctmp;
g_strstrip (aline);
if (!aline[0] || aline[0] == '#' || aline[0] == '!')
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continue;
ctmp = strtok (aline, " \t");
if (!ctmp)
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continue;
red = atoi (ctmp);
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ctmp = strtok (NULL, " \t");
if (!ctmp)
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continue;
green = atoi (ctmp);
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ctmp = strtok (NULL, " \t");
if (!ctmp)
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continue;
blue = atoi (ctmp);
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ctmp = strtok (NULL, " \t");
if (!ctmp || strcmp (ctmp, spec))
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continue;
color->red = red << 8;
color->green = green << 8;
color->blue = blue << 8;
return TRUE;
}
fclose (fh);
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}
return FALSE;
}
void
gdk_colormap_free_colors (GdkColormap *colormap,
GdkColor *colors,
gint ncolors)
{
GdkColormapPrivateFB *private;
gint i;
g_return_if_fail (colormap != NULL);
g_return_if_fail (colors != NULL);
private = GDK_COLORMAP_PRIVATE_DATA (colormap);
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if ((colormap->visual->type != GDK_VISUAL_PSEUDO_COLOR) &&
(colormap->visual->type != GDK_VISUAL_GRAYSCALE))
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return;
for (i=0; i<ncolors; i++)
{
gulong pixel = colors[i].pixel;
if (private->info[pixel].ref_count)
{
private->info[pixel].ref_count--;
if (private->info[pixel].ref_count == 0)
{
if (!(private->info[pixel].flags & GDK_COLOR_WRITEABLE))
g_hash_table_remove (private->hash, &colormap->colors[pixel]);
private->info[pixel].flags = 0;
}
}
}
}
/********************
* Color allocation *
********************/
/* Try to allocate a single color using XAllocColor. If it succeeds,
* cache the result in our colormap, and store in ret.
*/
static gboolean
gdk_colormap_alloc1 (GdkColormap *colormap,
GdkColor *color,
GdkColor *ret)
{
GdkColormapPrivateFB *private;
int i;
private = GDK_COLORMAP_PRIVATE_DATA (colormap);
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if (colormap->visual->type != GDK_VISUAL_GRAYSCALE
&& colormap->visual->type != GDK_VISUAL_PSEUDO_COLOR)
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return FALSE;
*ret = *color;
if (!color->red && !color->green && !color->blue) /* black */
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{
ret->pixel = 0;
private->info[ret->pixel].ref_count++;
return TRUE;
}
if (color->red == 65535 && color->green == 65535 && color->blue == 65535) /* white */
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{
ret->pixel = 255;
private->info[ret->pixel].ref_count++;
return TRUE;
}
for (i = 1; i < (colormap->size - 1); i++)
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{
if (!private->info[i].ref_count)
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{
guint16 red = color->red, green = color->green, blue = color->blue;
struct fb_cmap fbc;
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fbc.len = 1;
fbc.start = i;
fbc.red = &red;
fbc.green = &green;
fbc.blue = &blue;
ioctl (gdk_display->fd, FBIOPUTCMAP, &fbc);
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ret->pixel = i;
colormap->colors[ret->pixel] = *ret;
private->info[ret->pixel].ref_count = 1;
g_hash_table_insert (private->hash,
&colormap->colors[ret->pixel],
&colormap->colors[ret->pixel]);
return TRUE;
}
}
return FALSE;
}
static gint
gdk_colormap_alloc_colors_shared (GdkColormap *colormap,
GdkColor *colors,
gint ncolors,
gboolean writeable,
gboolean best_match,
gboolean *success)
{
GdkColormapPrivateFB *private;
gint i, index;
gint nremaining = 0;
gint nfailed = 0;
private = GDK_COLORMAP_PRIVATE_DATA (colormap);
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index = -1;
for (i=0; i<ncolors; i++)
{
if (!success[i])
{
if (gdk_colormap_alloc1 (colormap, &colors[i], &colors[i]))
success[i] = TRUE;
else
nremaining++;
}
}
if (nremaining > 0 && best_match)
{
gchar *available = g_new (gchar, colormap->size);
for (i = 0; i < colormap->size; i++)
available[i] = ((private->info[i].ref_count == 0) ||
!(private->info[i].flags && GDK_COLOR_WRITEABLE));
while (nremaining > 0)
{
for (i=0; i<ncolors; i++)
{
if (!success[i])
{
index = gdk_colormap_match_color (colormap, &colors[i], available);
if (index != -1)
{
if (private->info[index].ref_count)
{
private->info[index].ref_count++;
colors[i] = colormap->colors[index];
success[i] = TRUE;
nremaining--;
}
else
{
if (gdk_colormap_alloc1 (colormap,
&colormap->colors[index],
&colors[i]))
{
success[i] = TRUE;
nremaining--;
break;
}
else
{
available[index] = FALSE;
}
}
}
else
{
nfailed++;
nremaining--;
success[i] = 2; /* flag as permanent failure */
}
}
}
}
g_free (available);
}
/* Change back the values we flagged as permanent failures */
if (nfailed > 0)
{
for (i=0; i<ncolors; i++)
if (success[i] == 2)
success[i] = FALSE;
nremaining = nfailed;
}
return (ncolors - nremaining);
}
static gint
gdk_colormap_alloc_colors_pseudocolor (GdkColormap *colormap,
GdkColor *colors,
gint ncolors,
gboolean writeable,
gboolean best_match,
gboolean *success)
{
GdkColormapPrivateFB *private;
GdkColor *lookup_color;
gint i;
gint nremaining = 0;
private = GDK_COLORMAP_PRIVATE_DATA (colormap);
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/* Check for an exact match among previously allocated colors */
for (i=0; i<ncolors; i++)
{
if (!success[i])
{
lookup_color = g_hash_table_lookup (private->hash, &colors[i]);
if (lookup_color)
{
private->info[lookup_color->pixel].ref_count++;
colors[i].pixel = lookup_color->pixel;
success[i] = TRUE;
}
else
nremaining++;
}
}
/* If that failed, we try to allocate a new color, or approxmiate
* with what we can get if best_match is TRUE.
*/
if (nremaining > 0)
return gdk_colormap_alloc_colors_shared (colormap, colors, ncolors, writeable, best_match, success);
else
return 0;
}
gint
gdk_colormap_alloc_colors (GdkColormap *colormap,
GdkColor *colors,
gint ncolors,
gboolean writeable,
gboolean best_match,
gboolean *success)
{
GdkColormapPrivateFB *private;
GdkVisual *visual;
gint i;
gint nremaining = 0;
g_return_val_if_fail (colormap != NULL, FALSE);
g_return_val_if_fail (colors != NULL, FALSE);
private = GDK_COLORMAP_PRIVATE_DATA (colormap);
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for (i=0; i<ncolors; i++)
success[i] = FALSE;
visual = colormap->visual;
switch (visual->type)
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{
case GDK_VISUAL_PSEUDO_COLOR:
case GDK_VISUAL_GRAYSCALE:
case GDK_VISUAL_STATIC_GRAY:
case GDK_VISUAL_STATIC_COLOR:
return gdk_colormap_alloc_colors_pseudocolor (colormap, colors, ncolors,
writeable, best_match, success);
break;
case GDK_VISUAL_DIRECT_COLOR:
case GDK_VISUAL_TRUE_COLOR:
for (i=0; i<ncolors; i++)
{
colors[i].pixel = (((colors[i].red >> (16 - visual->red_prec)) << visual->red_shift) +
((colors[i].green >> (16 - visual->green_prec)) << visual->green_shift) +
((colors[i].blue >> (16 - visual->blue_prec)) << visual->blue_shift));
success[i] = TRUE;
}
break;
}
return nremaining;
}
gboolean
gdk_color_change (GdkColormap *colormap,
GdkColor *color)
{
GdkColormapPrivateFB *private;
struct fb_cmap fbc = {0, 1};
g_return_val_if_fail (colormap != NULL, FALSE);
g_return_val_if_fail (color != NULL, FALSE);
private = GDK_COLORMAP_PRIVATE_DATA (colormap);
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switch(colormap->visual->type)
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{
case GDK_VISUAL_GRAYSCALE:
color->red = color->green = color->blue = (color->red + color->green + color->blue)/3;
case GDK_VISUAL_PSEUDO_COLOR:
fbc.start = color->pixel;
fbc.red = &color->red;
fbc.green = &color->green;
fbc.blue = &color->blue;
ioctl (gdk_display->fd, FBIOPUTCMAP, &fbc);
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break;
default:
break;
}
return TRUE;
}
static gint
gdk_colormap_match_color (GdkColormap *cmap,
GdkColor *color,
const gchar *available)
{
GdkColor *colors;
guint sum, max;
gint rdiff, gdiff, bdiff;
gint i, index;
g_return_val_if_fail (cmap != NULL, 0);
g_return_val_if_fail (color != NULL, 0);
colors = cmap->colors;
max = 3 * (65536);
index = -1;
for (i = 0; i < cmap->size; i++)
{
if ((!available) || (available && available[i]))
{
rdiff = (color->red - colors[i].red);
gdiff = (color->green - colors[i].green);
bdiff = (color->blue - colors[i].blue);
sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
if (sum < max)
{
index = i;
max = sum;
}
}
}
return index;
}
gint
gdk_colors_alloc (GdkColormap *colormap,
gboolean contiguous,
gulong *planes,
gint nplanes,
gulong *pixels,
gint npixels)
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{
return 0;
}
void
gdk_colors_free (GdkColormap *colormap,
gulong *pixels,
gint npixels,
gulong planes)
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{
}