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gtk/gdk/x11/gdkpixmap-x11.c
Owen Taylor 244e4fe4c7 Fix to pixmap mask handling. (gtk-fortier-971122-0.patch) 
-owt
1997-12-09 22:02:50 +00:00

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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 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 "../config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
/* Needed for SEEK_END in SunOS */
#include <unistd.h>
#include <X11/Xlib.h>
#include "gdk.h"
#include "gdkprivate.h"
typedef struct
{
gchar *color_string;
GdkColor color;
gint transparent;
} _GdkPixmapColor;
GdkPixmap*
gdk_pixmap_new (GdkWindow *window,
gint width,
gint height,
gint depth)
{
GdkPixmap *pixmap;
GdkWindowPrivate *private;
GdkWindowPrivate *window_private;
if (!window)
window = (GdkWindow*) &gdk_root_parent;
if (depth == -1)
gdk_window_get_geometry (window, NULL, NULL, NULL, NULL, &depth);
private = g_new (GdkWindowPrivate, 1);
pixmap = (GdkPixmap*) private;
window_private = (GdkWindowPrivate*) window;
private->xdisplay = window_private->xdisplay;
private->window_type = GDK_WINDOW_PIXMAP;
private->xwindow = XCreatePixmap (private->xdisplay, window_private->xwindow,
width, height, depth);
private->parent = NULL;
private->x = 0;
private->y = 0;
private->width = width;
private->height = height;
private->resize_count = 0;
private->ref_count = 1;
private->destroyed = 0;
gdk_xid_table_insert (&private->xwindow, pixmap);
return pixmap;
}
GdkPixmap *
gdk_bitmap_create_from_data (GdkWindow *window,
gchar *data,
gint width,
gint height)
{
GdkPixmap *pixmap;
GdkWindowPrivate *private;
GdkWindowPrivate *window_private;
g_return_val_if_fail (data != NULL, NULL);
if (!window)
window = (GdkWindow*) &gdk_root_parent;
private = g_new (GdkWindowPrivate, 1);
pixmap = (GdkPixmap*) private;
window_private = (GdkWindowPrivate*) window;
private->parent = NULL;
private->xdisplay = window_private->xdisplay;
private->window_type = GDK_WINDOW_PIXMAP;
private->x = 0;
private->y = 0;
private->width = width;
private->height = height;
private->resize_count = 0;
private->ref_count = 1;
private->destroyed = FALSE;
private->xwindow = XCreateBitmapFromData (private->xdisplay,
window_private->xwindow,
data, width, height);
gdk_xid_table_insert (&private->xwindow, pixmap);
return pixmap;
}
GdkPixmap*
gdk_pixmap_create_from_data (GdkWindow *window,
gchar *data,
gint width,
gint height,
gint depth,
GdkColor *fg,
GdkColor *bg)
{
GdkPixmap *pixmap;
GdkWindowPrivate *private;
GdkWindowPrivate *window_private;
g_return_val_if_fail (data != NULL, NULL);
g_return_val_if_fail (fg != NULL, NULL);
g_return_val_if_fail (bg != NULL, NULL);
if (!window)
window = (GdkWindow*) &gdk_root_parent;
if (depth == -1)
gdk_window_get_geometry (window, NULL, NULL, NULL, NULL, &depth);
private = g_new (GdkWindowPrivate, 1);
pixmap = (GdkPixmap*) private;
window_private = (GdkWindowPrivate*) window;
private->parent = NULL;
private->xdisplay = window_private->xdisplay;
private->window_type = GDK_WINDOW_PIXMAP;
private->x = 0;
private->y = 0;
private->width = width;
private->height = height;
private->resize_count = 0;
private->ref_count = 1;
private->destroyed = FALSE;
private->xwindow = XCreatePixmapFromBitmapData (private->xdisplay,
window_private->xwindow,
data, width, height,
fg->pixel, bg->pixel, depth);
gdk_xid_table_insert (&private->xwindow, pixmap);
return pixmap;
}
gint
gdk_pixmap_seek_string (FILE *infile,
const gchar *str,
gint skip_comments)
{
char instr[1024];
while (!feof (infile))
{
fscanf (infile, "%s", instr);
if (skip_comments == TRUE && strcmp (instr, "/*") == 0)
{
fscanf (infile, "%s", instr);
while (!feof (infile) && strcmp (instr, "*/") != 0)
fscanf (infile, "%s", instr);
fscanf(infile, "%s", instr);
}
if (strcmp (instr, str)==0)
return TRUE;
}
return FALSE;
}
gint
gdk_pixmap_seek_char (FILE *infile,
gchar c)
{
gchar b, oldb;
while (!feof (infile))
{
fscanf(infile, "%c", &b);
if (c != b && b == '/')
{
fscanf (infile, "%c", &b);
if (b == '*')
{
oldb = b;
while (!feof (infile) && !(oldb == '*' && b == '/'))
{
oldb = b;
fscanf (infile, "%c", &b);
}
fscanf (infile, "%c", &b);
}
}
if (c == b)
return TRUE;
}
return FALSE;
}
gint
gdk_pixmap_read_string (FILE *infile,
gchar **buffer,
int *buffer_size)
{
gchar c;
gint cnt = 0;
if ((*buffer) == NULL)
{
(*buffer_size) = 10 * sizeof (gchar);
(*buffer) = (gchar *) malloc (*buffer_size);
}
do
fscanf (infile, "%c", &c);
while (!feof (infile) && c != '"');
if (c != '"')
return FALSE;
while (!feof (infile))
{
fscanf (infile, "%c", &c);
if (cnt == (*buffer_size))
{
(*buffer_size) *= 2;
(*buffer) = (gchar *) realloc ((*buffer), *buffer_size);
}
if (c != '"')
(*buffer)[cnt++] = c;
else
{
(*buffer)[cnt++] = 0;
return TRUE;
}
}
return FALSE;
}
gchar*
gdk_pixmap_skip_whitespaces (gchar *buffer)
{
gint32 index = 0;
while (buffer[index] != 0 && (buffer[index] == 0x20 || buffer[index] == 0x09))
index++;
return &buffer[index];
}
gchar*
gdk_pixmap_skip_string (gchar *buffer)
{
gint32 index = 0;
while (buffer[index] != 0 && buffer[index] != 0x20 && buffer[index] != 0x09)
index++;
return &buffer[index];
}
gchar*
gdk_pixmap_extract_color (gchar *buffer)
{
gint counter, finished = FALSE, numnames;
gchar *ptr = NULL, ch, temp[128];
gchar color[128], *retcol;
counter = 0;
while (ptr == NULL)
{
if (buffer[counter] == 'c')
{
ch = buffer[counter + 1];
if (ch == 0x20 || ch == 0x09)
ptr = &buffer[counter + 1];
}
else if (buffer[counter] == 0)
return NULL;
counter++;
}
if (ptr == NULL)
return NULL;
ptr = gdk_pixmap_skip_whitespaces (ptr);
if (ptr[0] == 0)
return NULL;
else if (ptr[0] == '#')
{
retcol = g_new(gchar, strlen (ptr) + 1);
strcpy (retcol, ptr);
return retcol;
}
color[0] = 0;
numnames = 0;
while (finished == FALSE)
{
sscanf (ptr, "%s", temp);
if ((gint)ptr[0] == 0 || strcmp ("s", temp) == 0 || strcmp ("m", temp) == 0 ||
strcmp ("g", temp) == 0 || strcmp ("g4", temp) == 0)
finished = TRUE;
else
{
if (numnames > 0)
strcat (color, " ");
strcat (color, temp);
ptr = gdk_pixmap_skip_string (ptr);
ptr = gdk_pixmap_skip_whitespaces (ptr);
numnames++;
}
}
retcol = g_new(gchar, strlen (color) + 1);
strcpy (retcol, color);
return retcol;
}
GdkPixmap*
gdk_pixmap_create_from_xpm (GdkWindow *window,
GdkBitmap **mask,
GdkColor *transparent_color,
const gchar *filename)
{
FILE *infile = NULL;
GdkPixmap *pixmap = NULL;
GdkImage *image = NULL;
GdkColormap *colormap;
GdkVisual *visual;
GdkGC *gc;
GdkColor tmp_color;
gint width, height, num_cols, cpp, cnt, n, ns, xcnt, ycnt;
gchar *buffer = NULL, *color_name = NULL, pixel_str[32];
guint buffer_size = 0;
_GdkPixmapColor *colors = NULL, *color = NULL;
gulong index;
if (!window)
window = (GdkWindow*) &gdk_root_parent;
infile = fopen (filename, "rb");
if (infile != NULL)
{
if (gdk_pixmap_seek_string (infile, "XPM", FALSE) == TRUE)
{
if (gdk_pixmap_seek_char (infile,'{') == TRUE)
{
gdk_pixmap_seek_char (infile, '"');
fseek (infile, -1, SEEK_CUR);
gdk_pixmap_read_string (infile, &buffer, &buffer_size);
sscanf (buffer,"%d %d %d %d", &width, &height, &num_cols, &cpp);
colors = g_new(_GdkPixmapColor, num_cols);
colormap = gdk_window_get_colormap (window);
visual = gdk_window_get_visual (window);
if (transparent_color == NULL)
{
gdk_color_white (colormap, &tmp_color);
transparent_color = &tmp_color;
}
for (cnt = 0; cnt < num_cols; cnt++)
{
gdk_pixmap_seek_char (infile, '"');
fseek (infile, -1, SEEK_CUR);
gdk_pixmap_read_string (infile, &buffer, &buffer_size);
colors[cnt].color_string = g_new(gchar, cpp + 1);
for (n = 0; n < cpp; n++)
colors[cnt].color_string[n] = buffer[n];
colors[cnt].color_string[n] = 0;
colors[cnt].transparent = FALSE;
if (color_name != NULL)
g_free (color_name);
color_name = gdk_pixmap_extract_color (&buffer[cpp]);
if (color_name != NULL)
{
if (gdk_color_parse (color_name, &colors[cnt].color) == FALSE)
{
colors[cnt].color = *transparent_color;
colors[cnt].transparent = TRUE;
}
}
else
{
colors[cnt].color = *transparent_color;
colors[cnt].transparent = TRUE;
}
gdk_color_alloc (colormap, &colors[cnt].color);
}
index = 0;
image = gdk_image_new (GDK_IMAGE_FASTEST, visual, width, height);
gc = NULL;
if (mask)
{
/* The pixmap mask is just a bits pattern.
* Color 0 is used for background and 1 for foreground.
* We don't care about the colormap, we just need 0 and 1.
*/
GdkColor mask_pattern;
*mask = gdk_pixmap_new (window, width, height, 1);
gc = gdk_gc_new (*mask);
mask_pattern.pixel = 0;
gdk_gc_set_foreground (gc, &mask_pattern);
gdk_draw_rectangle (*mask, gc, TRUE, 0, 0, -1, -1);
mask_pattern.pixel = 1;
gdk_gc_set_foreground (gc, &mask_pattern);
}
for (ycnt = 0; ycnt < height; ycnt++)
{
gdk_pixmap_read_string (infile, &buffer, &buffer_size);
for (n = 0, cnt = 0, xcnt = 0; n < (width * cpp); n += cpp, xcnt++)
{
strncpy (pixel_str, &buffer[n], cpp);
pixel_str[cpp] = 0;
color = NULL;
ns = 0;
while (color == NULL)
{
if (strcmp (pixel_str, colors[ns].color_string) == 0)
color = &colors[ns];
else
ns++;
}
gdk_image_put_pixel (image, xcnt, ycnt, color->color.pixel);
if (mask && color->transparent)
{
if (cnt < xcnt)
gdk_draw_line (*mask, gc, cnt, ycnt, xcnt - 1, ycnt);
cnt = xcnt + 1;
}
}
if (mask && (cnt < xcnt))
gdk_draw_line (*mask, gc, cnt, ycnt, xcnt - 1, ycnt);
}
if (mask)
gdk_gc_destroy (gc);
pixmap = gdk_pixmap_new (window, width, height, visual->depth);
gc = gdk_gc_new (pixmap);
gdk_gc_set_foreground (gc, transparent_color);
gdk_draw_image (pixmap, gc, image, 0, 0, 0, 0, image->width, image->height);
gdk_gc_destroy (gc);
gdk_image_destroy (image);
}
}
fclose (infile);
free (buffer);
if (colors != NULL)
{
for (cnt = 0; cnt < num_cols; cnt++)
g_free (colors[cnt].color_string);
g_free (colors);
}
}
return pixmap;
}
GdkPixmap*
gdk_pixmap_create_from_xpm_d (GdkWindow *window,
GdkBitmap **mask,
GdkColor *transparent_color,
gchar **data)
{
GdkPixmap *pixmap = NULL;
GdkImage *image = NULL;
GdkColormap *colormap;
GdkVisual *visual;
GdkGC *gc;
GdkColor tmp_color;
gint width, height, num_cols, cpp, cnt, n, ns, xcnt, ycnt, i;
gchar *buffer, *color_name = NULL, pixel_str[32];
_GdkPixmapColor *colors = NULL, *color = NULL;
gulong index;
if (!window)
window = (GdkWindow*) &gdk_root_parent;
i = 0;
buffer = data[i++];
sscanf (buffer,"%d %d %d %d", &width, &height, &num_cols, &cpp);
colors = g_new(_GdkPixmapColor, num_cols);
colormap = gdk_window_get_colormap (window);
visual = gdk_window_get_visual (window);
if (transparent_color == NULL)
{
gdk_color_white (colormap, &tmp_color);
transparent_color = &tmp_color;
}
for (cnt = 0; cnt < num_cols; cnt++)
{
buffer = data[i++];
colors[cnt].color_string = g_new(gchar, cpp + 1);
for (n = 0; n < cpp; n++)
colors[cnt].color_string[n] = buffer[n];
colors[cnt].color_string[n] = 0;
colors[cnt].transparent = FALSE;
if (color_name != NULL)
g_free (color_name);
color_name = gdk_pixmap_extract_color (&buffer[cpp]);
if (color_name != NULL)
{
if (gdk_color_parse (color_name, &colors[cnt].color) == FALSE)
{
colors[cnt].color = *transparent_color;
colors[cnt].transparent = TRUE;
}
}
else
{
colors[cnt].color = *transparent_color;
colors[cnt].transparent = TRUE;
}
gdk_color_alloc (colormap, &colors[cnt].color);
}
index = 0;
image = gdk_image_new (GDK_IMAGE_FASTEST, visual, width, height);
gc = NULL;
if (mask)
{
/* The pixmap mask is just a bits pattern.
* Color 0 is used for background and 1 for foreground.
* We don't care about the colormap, we just need 0 and 1.
*/
GdkColor mask_pattern;
*mask = gdk_pixmap_new (window, width, height, 1);
gc = gdk_gc_new (*mask);
mask_pattern.pixel = 0;
gdk_gc_set_foreground (gc, &mask_pattern);
gdk_draw_rectangle (*mask, gc, TRUE, 0, 0, -1, -1);
mask_pattern.pixel = 1;
gdk_gc_set_foreground (gc, &mask_pattern);
}
for (ycnt = 0; ycnt < height; ycnt++)
{
buffer = data[i++];
for (n = 0, cnt = 0, xcnt = 0; n < (width * cpp); n += cpp, xcnt++)
{
strncpy (pixel_str, &buffer[n], cpp);
pixel_str[cpp] = 0;
color = NULL;
ns = 0;
while (color == NULL)
{
if (strcmp (pixel_str, colors[ns].color_string) == 0)
color = &colors[ns];
else
ns++;
}
gdk_image_put_pixel (image, xcnt, ycnt, color->color.pixel);
if (mask && color->transparent)
{
if (cnt < xcnt)
gdk_draw_line (*mask, gc, cnt, ycnt, xcnt - 1, ycnt);
cnt = xcnt + 1;
}
}
if (mask && (cnt < xcnt))
gdk_draw_line (*mask, gc, cnt, ycnt, xcnt - 1, ycnt);
}
if (mask)
gdk_gc_destroy (gc);
pixmap = gdk_pixmap_new (window, width, height, visual->depth);
gc = gdk_gc_new (pixmap);
gdk_gc_set_foreground (gc, transparent_color);
gdk_draw_image (pixmap, gc, image, 0, 0, 0, 0, image->width, image->height);
gdk_gc_destroy (gc);
gdk_image_destroy (image);
if (colors != NULL)
{
for (cnt = 0; cnt < num_cols; cnt++)
g_free (colors[cnt].color_string);
g_free (colors);
}
return pixmap;
}
void
gdk_pixmap_destroy (GdkPixmap *pixmap)
{
GdkWindowPrivate *private;
g_return_if_fail (pixmap != NULL);
private = (GdkPixmapPrivate*) pixmap;
if (private->ref_count <= 0)
{
XFreePixmap (private->xdisplay, private->xwindow);
gdk_xid_table_remove (private->xwindow);
g_free (pixmap);
}
else
{
private->ref_count -= 1;
}
}
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