gtk2/gdk/gdkcolor.c
Shawn Amundson 1b6fb00808 Beginnings of support for 1 bpp depth in gdk. Very minor changes.
Most of testgtk runs on 1 bpp.  Nothing much else will work until
gdkcc is used for gtk_preview and other color-intensive things.

-Shawn
1997-12-20 08:39:21 +00:00

715 lines
16 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <X11/Xlib.h>
#include "gdk.h"
#include "gdkprivate.h"
static gint gdk_colormap_match_color (GdkColormap *cmap,
GdkColor *color,
const gchar *available);
static void gdk_colormap_add (GdkColormap *cmap);
static void gdk_colormap_remove (GdkColormap *cmap);
static guint gdk_colormap_hash (Colormap *cmap);
static gint gdk_colormap_cmp (Colormap *a,
Colormap *b);
static void gdk_colormap_real_destroy (GdkColormap *colormap);
static GHashTable *colormap_hash = NULL;
GdkColormap*
gdk_colormap_new (GdkVisual *visual,
gint private_cmap)
{
GdkColormap *colormap;
GdkColormapPrivate *private;
Visual *xvisual;
XColor default_colors[256];
int size;
int i;
g_return_val_if_fail (visual != NULL, NULL);
private = g_new (GdkColormapPrivate, 1);
colormap = (GdkColormap*) private;
private->xdisplay = gdk_display;
private->visual = visual;
private->next_color = 0;
private->ref_count = 1;
xvisual = ((GdkVisualPrivate*) visual)->xvisual;
switch (visual->type)
{
case GDK_VISUAL_GRAYSCALE:
case GDK_VISUAL_PSEUDO_COLOR:
private->private_val = private_cmap;
private->xcolormap = XCreateColormap (private->xdisplay, gdk_root_window,
xvisual, (private_cmap) ? (AllocAll) : (AllocNone));
if (private_cmap)
{
for (i = 0; i < 256; i++)
default_colors[i].pixel = i;
XQueryColors (private->xdisplay,
DefaultColormap (private->xdisplay, gdk_screen),
default_colors, visual->colormap_size);
for (i = 0; i < visual->colormap_size; i++)
{
colormap->colors[i].pixel = default_colors[i].pixel;
colormap->colors[i].red = default_colors[i].red;
colormap->colors[i].green = default_colors[i].green;
colormap->colors[i].blue = default_colors[i].blue;
}
gdk_colormap_change (colormap, visual->colormap_size);
}
break;
case GDK_VISUAL_DIRECT_COLOR:
private->private_val = TRUE;
private->xcolormap = XCreateColormap (private->xdisplay, gdk_root_window,
xvisual, AllocAll);
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, visual->colormap_size);
break;
case GDK_VISUAL_STATIC_GRAY:
case GDK_VISUAL_STATIC_COLOR:
case GDK_VISUAL_TRUE_COLOR:
private->private_val = FALSE;
private->xcolormap = XCreateColormap (private->xdisplay, gdk_root_window,
xvisual, AllocNone);
break;
}
gdk_colormap_add (colormap);
return colormap;
}
static void
gdk_colormap_real_destroy (GdkColormap *colormap)
{
GdkColormapPrivate *private = (GdkColormapPrivate*) colormap;
g_return_if_fail (colormap != NULL);
if (private->ref_count > 0)
return;
gdk_colormap_remove (colormap);
XFreeColormap (private->xdisplay, private->xcolormap);
g_free (colormap);
}
GdkColormap*
gdk_colormap_ref (GdkColormap *cmap)
{
GdkColormapPrivate *private = (GdkColormapPrivate *)cmap;
g_return_val_if_fail (cmap != NULL, NULL);
private->ref_count += 1;
return cmap;
}
void
gdk_colormap_unref (GdkColormap *cmap)
{
GdkColormapPrivate *private = (GdkColormapPrivate *)cmap;
g_return_if_fail (cmap != NULL);
private->ref_count -= 1;
if (private->ref_count == 0)
gdk_colormap_real_destroy (cmap);
}
GdkColormap*
gdk_colormap_get_system (void)
{
static GdkColormap *colormap = NULL;
GdkColormapPrivate *private;
XColor xpalette[256];
gint i;
if (!colormap)
{
private = g_new (GdkColormapPrivate, 1);
colormap = (GdkColormap*) private;
private->xdisplay = gdk_display;
private->xcolormap = DefaultColormap (gdk_display, gdk_screen);
private->visual = gdk_visual_get_system ();
private->private_val = FALSE;
private->next_color = 0;
private->ref_count = 1;
for (i = 0; i < 256; i++)
{
xpalette[i].pixel = i;
xpalette[i].red = 0;
xpalette[i].green = 0;
xpalette[i].blue = 0;
}
XQueryColors (gdk_display, private->xcolormap, xpalette,
private->visual->colormap_size);
for (i = 0; i < 256; i++)
{
colormap->colors[i].pixel = xpalette[i].pixel;
colormap->colors[i].red = xpalette[i].red;
colormap->colors[i].green = xpalette[i].green;
colormap->colors[i].blue = xpalette[i].blue;
}
gdk_colormap_add (colormap);
}
return colormap;
}
gint
gdk_colormap_get_system_size (void)
{
return DisplayCells (gdk_display, gdk_screen);
}
void
gdk_colormap_change (GdkColormap *colormap,
gint ncolors)
{
GdkColormapPrivate *private;
GdkVisual *visual;
XColor palette[256];
gint shift;
int max_colors;
int size;
int i;
g_return_if_fail (colormap != NULL);
private = (GdkColormapPrivate*) colormap;
switch (private->visual->type)
{
case GDK_VISUAL_GRAYSCALE:
case GDK_VISUAL_PSEUDO_COLOR:
for (i = 0; i < ncolors; i++)
{
palette[i].pixel = colormap->colors[i].pixel;
palette[i].red = colormap->colors[i].red;
palette[i].green = colormap->colors[i].green;
palette[i].blue = colormap->colors[i].blue;
palette[i].flags = DoRed | DoGreen | DoBlue;
}
XStoreColors (private->xdisplay, private->xcolormap, palette, ncolors);
private->next_color = MAX (private->next_color, ncolors);
break;
case GDK_VISUAL_DIRECT_COLOR:
visual = private->visual;
shift = visual->red_shift;
max_colors = 1 << visual->red_prec;
size = (ncolors < max_colors) ? (ncolors) : (max_colors);
for (i = 0; i < size; i++)
{
palette[i].pixel = i << shift;
palette[i].red = colormap->colors[i].red;
palette[i].flags = DoRed;
}
XStoreColors (private->xdisplay, private->xcolormap, palette, size);
shift = visual->green_shift;
max_colors = 1 << visual->green_prec;
size = (ncolors < max_colors) ? (ncolors) : (max_colors);
for (i = 0; i < size; i++)
{
palette[i].pixel = i << shift;
palette[i].green = colormap->colors[i].green;
palette[i].flags = DoGreen;
}
XStoreColors (private->xdisplay, private->xcolormap, palette, size);
shift = visual->blue_shift;
max_colors = 1 << visual->blue_prec;
size = (ncolors < max_colors) ? (ncolors) : (max_colors);
for (i = 0; i < size; i++)
{
palette[i].pixel = i << shift;
palette[i].blue = colormap->colors[i].blue;
palette[i].flags = DoBlue;
}
XStoreColors (private->xdisplay, private->xcolormap, palette, size);
break;
default:
break;
}
}
void
gdk_colors_store (GdkColormap *colormap,
GdkColor *colors,
gint ncolors)
{
gint i;
for (i = 0; i < ncolors; i++)
{
colormap->colors[i].pixel = colors[i].pixel;
colormap->colors[i].red = colors[i].red;
colormap->colors[i].green = colors[i].green;
colormap->colors[i].blue = colors[i].blue;
}
gdk_colormap_change (colormap, ncolors);
}
gint
gdk_colors_alloc (GdkColormap *colormap,
gint contiguous,
gulong *planes,
gint nplanes,
gulong *pixels,
gint npixels)
{
GdkColormapPrivate *private;
gint return_val;
g_return_val_if_fail (colormap != NULL, 0);
private = (GdkColormapPrivate*) colormap;
return_val = XAllocColorCells (private->xdisplay, private->xcolormap,
contiguous, planes, nplanes, pixels, npixels);
return return_val;
}
void
gdk_colors_free (GdkColormap *colormap,
gulong *pixels,
gint npixels,
gulong planes)
{
GdkColormapPrivate *private;
g_return_if_fail (colormap != NULL);
private = (GdkColormapPrivate*) colormap;
XFreeColors (private->xdisplay, private->xcolormap,
pixels, npixels, planes);
}
gint
gdk_color_white (GdkColormap *colormap,
GdkColor *color)
{
gint return_val;
g_return_val_if_fail (colormap != NULL, FALSE);
if (color)
{
color->pixel = WhitePixel (gdk_display, gdk_screen);
color->red = 65535;
color->green = 65535;
color->blue = 65535;
return_val = gdk_color_alloc (colormap, color);
}
else
return_val = FALSE;
return return_val;
}
gint
gdk_color_black (GdkColormap *colormap,
GdkColor *color)
{
gint return_val;
g_return_val_if_fail (colormap != NULL, FALSE);
if (color)
{
color->pixel = BlackPixel (gdk_display, gdk_screen);
color->red = 0;
color->green = 0;
color->blue = 0;
return_val = gdk_color_alloc (colormap, color);
}
else
return_val = FALSE;
return return_val;
}
gint
gdk_color_parse (const gchar *spec,
GdkColor *color)
{
Colormap xcolormap;
XColor xcolor;
gint return_val;
g_return_val_if_fail (spec != NULL, FALSE);
g_return_val_if_fail (color != NULL, FALSE);
xcolormap = DefaultColormap (gdk_display, gdk_screen);
if (XParseColor (gdk_display, xcolormap, spec, &xcolor))
{
return_val = TRUE;
color->red = xcolor.red;
color->green = xcolor.green;
color->blue = xcolor.blue;
}
else
return_val = FALSE;
return return_val;
}
gint
gdk_color_alloc (GdkColormap *colormap,
GdkColor *color)
{
GdkColormapPrivate *private;
GdkVisual *visual;
XColor xcolor;
gchar available[256];
gint available_init;
gint return_val;
gint i, index;
g_return_val_if_fail (colormap != NULL, FALSE);
g_return_val_if_fail (color != NULL, FALSE);
xcolor.red = color->red;
xcolor.green = color->green;
xcolor.blue = color->blue;
xcolor.pixel = color->pixel;
xcolor.flags = DoRed | DoGreen | DoBlue;
return_val = FALSE;
private = (GdkColormapPrivate*) colormap;
switch (private->visual->type)
{
case GDK_VISUAL_GRAYSCALE:
case GDK_VISUAL_PSEUDO_COLOR:
if (private->private_val)
{
if (private->next_color > 255)
{
for (i = 0; i < 256; i++)
available[i] = TRUE;
index = gdk_colormap_match_color (colormap, color, available);
if (index != -1)
{
available[index] = FALSE;
*color = colormap->colors[index];
return_val = TRUE;
}
else
{
return_val = FALSE;
}
}
else
{
xcolor.pixel = 255 - private->next_color;
color->pixel = xcolor.pixel;
private->next_color += 1;
XStoreColor (private->xdisplay, private->xcolormap, &xcolor);
return_val = TRUE;
}
}
else
{
available_init = 1;
while (1)
{
if (XAllocColor (private->xdisplay, private->xcolormap, &xcolor))
{
color->pixel = xcolor.pixel;
color->red = xcolor.red;
color->green = xcolor.green;
color->blue = xcolor.blue;
colormap->colors[color->pixel] = *color;
return_val = TRUE;
break;
}
else
{
if (available_init)
{
available_init = 0;
for (i = 0; i < 256; i++)
available[i] = TRUE;
}
index = gdk_colormap_match_color (colormap, color, available);
if (index != -1)
{
available[index] = FALSE;
xcolor.red = colormap->colors[index].red;
xcolor.green = colormap->colors[index].green;
xcolor.blue = colormap->colors[index].blue;
}
else
{
return_val = FALSE;
break;
}
}
}
}
break;
case GDK_VISUAL_DIRECT_COLOR:
visual = private->visual;
xcolor.pixel = (((xcolor.red >> (16 - visual->red_prec)) << visual->red_shift) +
((xcolor.green >> (16 - visual->green_prec)) << visual->green_shift) +
((xcolor.blue >> (16 - visual->blue_prec)) << visual->blue_shift));
color->pixel = xcolor.pixel;
return_val = TRUE;
break;
case GDK_VISUAL_STATIC_GRAY:
case GDK_VISUAL_STATIC_COLOR:
case GDK_VISUAL_TRUE_COLOR:
if (XAllocColor (private->xdisplay, private->xcolormap, &xcolor))
{
color->pixel = xcolor.pixel;
return_val = TRUE;
}
else
return_val = FALSE;
break;
}
return return_val;
}
gint
gdk_color_change (GdkColormap *colormap,
GdkColor *color)
{
GdkColormapPrivate *private;
XColor xcolor;
g_return_val_if_fail (colormap != NULL, FALSE);
g_return_val_if_fail (color != NULL, FALSE);
xcolor.pixel = color->pixel;
xcolor.red = color->red;
xcolor.green = color->green;
xcolor.blue = color->blue;
xcolor.flags = DoRed | DoGreen | DoBlue;
private = (GdkColormapPrivate*) colormap;
XStoreColor (private->xdisplay, private->xcolormap, &xcolor);
return TRUE;
}
gint
gdk_color_equal (GdkColor *colora,
GdkColor *colorb)
{
g_return_val_if_fail (colora != NULL, FALSE);
g_return_val_if_fail (colorb != NULL, FALSE);
return ((colora->red == colorb->red) &&
(colora->green == colorb->green) &&
(colora->blue == colorb->blue));
}
GdkColormap*
gdkx_colormap_get (Colormap xcolormap)
{
GdkColormap *colormap;
GdkColormapPrivate *private;
XColor xpalette[256];
gint i;
colormap = gdk_colormap_lookup (xcolormap);
if (colormap)
return colormap;
if (xcolormap == DefaultColormap (gdk_display, gdk_screen))
return gdk_colormap_get_system ();
private = g_new (GdkColormapPrivate, 1);
colormap = (GdkColormap*) private;
private->xdisplay = gdk_display;
private->xcolormap = xcolormap;
private->visual = NULL;
private->private_val = TRUE;
private->next_color = 0;
for (i = 0; i < 256; i++)
{
xpalette[i].pixel = i;
xpalette[i].red = 0;
xpalette[i].green = 0;
xpalette[i].blue = 0;
}
XQueryColors (gdk_display, private->xcolormap, xpalette, 256);
for (i = 0; i < 256; i++)
{
colormap->colors[i].pixel = xpalette[i].pixel;
colormap->colors[i].red = xpalette[i].red;
colormap->colors[i].green = xpalette[i].green;
colormap->colors[i].blue = xpalette[i].blue;
}
gdk_colormap_add (colormap);
return colormap;
}
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 < 256; 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;
}
GdkColormap*
gdk_colormap_lookup (Colormap xcolormap)
{
GdkColormap *cmap;
if (!colormap_hash)
return NULL;
cmap = g_hash_table_lookup (colormap_hash, &xcolormap);
return cmap;
}
static void
gdk_colormap_add (GdkColormap *cmap)
{
GdkColormapPrivate *private;
if (!colormap_hash)
colormap_hash = g_hash_table_new ((GHashFunc) gdk_colormap_hash,
(GCompareFunc) gdk_colormap_cmp);
private = (GdkColormapPrivate*) cmap;
g_hash_table_insert (colormap_hash, &private->xcolormap, cmap);
}
static void
gdk_colormap_remove (GdkColormap *cmap)
{
GdkColormapPrivate *private;
if (!colormap_hash)
colormap_hash = g_hash_table_new ((GHashFunc) gdk_colormap_hash,
(GCompareFunc) gdk_colormap_cmp);
private = (GdkColormapPrivate*) cmap;
g_hash_table_remove (colormap_hash, &private->xcolormap);
}
static guint
gdk_colormap_hash (Colormap *cmap)
{
return *cmap;
}
static gint
gdk_colormap_cmp (Colormap *a,
Colormap *b)
{
return (*a == *b);
}