File: PictureBase.c

package info (click to toggle)
fvwm 1:2.6.8-1
  • links: PTS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 15,804 kB
  • sloc: ansic: 145,770; xml: 17,093; perl: 7,302; sh: 4,921; makefile: 1,094; yacc: 688; lex: 187; sed: 11
file content (271 lines) | stat: -rw-r--r-- 6,177 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
/* -*-c-*- */
/* This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see: <http://www.gnu.org/licenses/>
 */

/*
  Changed 02/12/97 by Dan Espen:
  - added routines to determine color closeness, for color use reduction.
  Some of the logic comes from pixy2, so the copyright is below.
*/

/*
 *
 * Routines to handle initialization, loading, and removing of xpm's or mono-
 * icon images.
 *
 */

#include "config.h"

#include <stdio.h>

#include <X11/Xlib.h>

#include "fvwmlib.h"
#include "Graphics.h"
#include "PictureBase.h"
#include "PictureUtils.h"
#include "Fsvg.h"
#include "Strings.h"

Bool Pdefault;
Visual *Pvisual;
static Visual *FvwmVisual;
Colormap Pcmap;
static Colormap FvwmCmap;
unsigned int Pdepth;
static unsigned int FvwmDepth;
Display *Pdpy;            /* Save area for display pointer */
Bool PUseDynamicColors;

Pixel PWhitePixel;
Pixel PBlackPixel;
Pixel FvwmWhitePixel;
Pixel FvwmBlackPixel;

void PictureSetupWhiteAndBlack(void);


void PictureInitCMap(Display *dpy) {
	char *envp;

	Pdpy = dpy;
	/* if fvwm has not set this env-var it is using the default visual */
	envp = getenv("FVWM_VISUALID");
	if (envp != NULL && *envp > 0) {
		/* convert the env-vars to a visual and colormap */
		int viscount;
		XVisualInfo vizinfo, *xvi;

		sscanf(envp, "%lx", &vizinfo.visualid);
		xvi = XGetVisualInfo(dpy, VisualIDMask, &vizinfo, &viscount);
		Pvisual = xvi->visual;
		Pdepth = xvi->depth;
		/* Note: if FVWM_VISUALID is set, FVWM_COLORMAP is set too */
		sscanf(getenv("FVWM_COLORMAP"), "%lx", &Pcmap);
		Pdefault = False;
	} else {
		int screen = DefaultScreen(dpy);

		Pvisual = DefaultVisual(dpy, screen);
		Pdepth = DefaultDepth(dpy, screen);
		Pcmap = DefaultColormap(dpy, screen);
		Pdefault = True;
	}

	PictureSetupWhiteAndBlack();
	PictureSaveFvwmVisual();

	/* initialise color limit */
	PUseDynamicColors = 0;
	PictureInitColors(PICTURE_CALLED_BY_MODULE, True, NULL, False, True);
	return;
}

void PictureInitCMapRoot(
	Display *dpy, Bool init_color_limit, PictureColorLimitOption *opt,
	Bool use_my_color_limit, Bool init_dither)
{
	int screen = DefaultScreen(dpy);

	Pdpy = dpy;

	Pvisual = DefaultVisual(dpy, screen);
	Pdepth = DefaultDepth(dpy, screen);
	Pcmap = DefaultColormap(dpy, screen);
	Pdefault = True;

	PictureSetupWhiteAndBlack();
	PictureSaveFvwmVisual();

	/* initialise color limit */
	PictureInitColors(
		PICTURE_CALLED_BY_MODULE, init_color_limit, opt,
		use_my_color_limit, init_dither);
	return;
}

void PictureSetupWhiteAndBlack(void)
{
	XColor c;

	if (!Pdefault)
	{
		c.flags = DoRed|DoGreen|DoBlue;
		c.red = c.green = c.blue = 65535;
		XAllocColor(Pdpy, Pcmap, &c);
		PWhitePixel = c.pixel;
		c.red = c.green = c.blue = 0;
		XAllocColor(Pdpy, Pcmap, &c);
		PBlackPixel = c.pixel;
	}
	else
	{
		PWhitePixel = WhitePixel(Pdpy, DefaultScreen(Pdpy));
		PBlackPixel = BlackPixel(Pdpy, DefaultScreen(Pdpy));
	}

	return;
}

void PictureUseDefaultVisual(void)
{
	int screen = DefaultScreen(Pdpy);

	Pvisual = DefaultVisual(Pdpy, screen);
	Pdepth = DefaultDepth(Pdpy, screen);
	Pcmap = DefaultColormap(Pdpy, screen);
	PWhitePixel = WhitePixel(Pdpy, DefaultScreen(Pdpy));
	PBlackPixel = BlackPixel(Pdpy, DefaultScreen(Pdpy));
	return;
}

void PictureUseFvwmVisual(void)
{
	Pvisual = FvwmVisual;
	Pdepth = FvwmDepth;
	Pcmap = FvwmCmap;
	PWhitePixel = FvwmWhitePixel;
	PBlackPixel = FvwmBlackPixel;
	return;
}

void PictureSaveFvwmVisual(void)
{
	FvwmVisual = Pvisual;
	FvwmDepth = Pdepth;
	FvwmCmap = Pcmap;
	FvwmWhitePixel = PWhitePixel;
	FvwmBlackPixel = PBlackPixel;
	return;
}

Pixel PictureWhitePixel(void)
{
	return PWhitePixel;
}

Pixel PictureBlackPixel(void)
{
	return PBlackPixel;
}

GC PictureDefaultGC(Display *dpy, Window win)
{
	static GC gc = None;

	if (Pdepth == DefaultDepth(dpy, DefaultScreen(dpy)))
	{
		return DefaultGC(dpy, DefaultScreen(dpy));
	}
	if (gc == None)
	{
		gc = fvwmlib_XCreateGC(dpy, win, 0, NULL);
	}

	return gc;
}

static char* imagePath = FVWM_IMAGEPATH;

void PictureSetImagePath( const char* newpath )
{
	static int need_to_free = 0;
	setPath( &imagePath, newpath, need_to_free );
	need_to_free = 1;

	return;
}

char* PictureGetImagePath(void)
{
	return imagePath;
}

/*
 *
 * Find the specified image file somewhere along the given path.
 *
 * There is a possible race condition here:  We check the file and later
 * do something with it.  By then, the file might not be accessible.
 * Oh well.
 *
 */
char* PictureFindImageFile(const char* icon, const char* pathlist, int type)
{
	int length;
	char *tmpbuf;
	char *full_filename;
	const char *render_opts;

	if (pathlist == NULL)
	{
		pathlist = imagePath;
	}
	if (icon == NULL)
	{
		return NULL;
	}

	full_filename = searchPath(pathlist, icon, ".gz", type);

	/* With USE_SVG, rendering options may be appended to the
	   original filename, hence seachPath() won't find the file.
	   So we hide any such appended options and try once more. */
        if (USE_SVG && !full_filename &&
	    (render_opts = strrchr(icon, ':')))
	{
		length = render_opts - icon;
		tmpbuf = (char *)safemalloc(length + 1);
		strncpy(tmpbuf, icon, length);
		tmpbuf[length] = 0;

		full_filename = searchPath(pathlist, tmpbuf, ".gz", type);
		free(tmpbuf);
		if (full_filename)
		{
			/* Prepending (the previously appended) options
			   will leave any file suffix exposed. Callers
			   who want to access the file on disk will have
			   to remove these prepended options themselves.
			   The format is ":svg_opts:/path/to/file.svg". */
			tmpbuf = CatString3(render_opts, ":", full_filename);
			free(full_filename);
			full_filename = safestrdup(tmpbuf);
		}
	}

	return full_filename;
}