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1// ImageControl.hh for FbTk - Fluxbox Toolkit
2// Copyright (c) 2001 - 2003 Henrik Kinnunen (fluxbox at users.sourceforge.net)
3//
4// from Image.hh for Blackbox - an X11 Window manager
5// Copyright (c) 1997 - 2000 Brad Hughes (bhughes at tcac.net)
6//
7// Permission is hereby granted, free of charge, to any person obtaining a
8// copy of this software and associated documentation files (the "Software"),
9// to deal in the Software without restriction, including without limitation
10// the rights to use, copy, modify, merge, publish, distribute, sublicense,
11// and/or sell copies of the Software, and to permit persons to whom the
12// Software is furnished to do so, subject to the following conditions:
13//
14// The above copyright notice and this permission notice shall be included in
15// all copies or substantial portions of the Software.
16//
17// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23// DEALINGS IN THE SOFTWARE.
24
25// $Id: ImageControl.hh,v 1.2 2003/05/16 00:19:51 fluxgen Exp $
26
27#ifndef FBTK_IMAGECONTROL_HH
28#define FBTK_IMAGECONTROL_HH
29
30#include "Texture.hh"
31#include "Timer.hh"
32#include "NotCopyable.hh"
33
34#include <X11/Xlib.h>
35#include <X11/Xutil.h>
36#include <list>
37
38namespace FbTk {
39
40/// Holds screen info, color tables and caches textures
41class ImageControl : public TimeoutHandler, private NotCopyable {
42public:
43 ImageControl(int screen_num, bool dither = false, int colors_per_channel = 4,
44 unsigned long cache_timeout = 300000l, unsigned long cache_max = 200l);
45 virtual ~ImageControl();
46
47 inline bool doDither() const { return m_dither; }
48 inline int bitsPerPixel() const { return bits_per_pixel; }
49 inline int depth() const { return m_screen_depth; }
50 inline int colorsPerChannel() const { return m_colors_per_channel; }
51 int screenNum() const { return m_screen_num; }
52 Visual *visual() const { return m_visual; }
53 unsigned long getSqrt(unsigned int val) const;
54
55 /**
56 Render to pixmap
57 @param width width of pixmap
58 @param height height of pixmap
59 @param src_texture texture type to render
60 @return pixmap of the rendered image, on failure None
61 */
62 Pixmap renderImage(unsigned int width, unsigned int height,
63 const FbTk::Texture &src_texture);
64
65 void installRootColormap();
66 void removeImage(Pixmap thepix);
67 void colorTables(const unsigned char **, const unsigned char **, const unsigned char **,
68 int *, int *, int *, int *, int *, int *) const;
69 void getXColorTable(XColor **, int *);
70 void getGradientBuffers(unsigned int, unsigned int,
71 unsigned int **, unsigned int **);
72 void setDither(bool d) { m_dither = d; }
73 void setColorsPerChannel(int cpc);
74
75 virtual void timeout();
76
77private:
78 /**
79 Search cache for a specific pixmap
80 @return None if no cache was found
81 */
82 Pixmap searchCache(unsigned int width, unsigned int height, unsigned long texture_type,
83 const FbTk::Color &color, const FbTk::Color &color_to) const;
84
85 void createColorTable();
86 bool m_dither;
87
88 Timer m_timer;
89
90 Colormap m_colormap;
91
92 Window m_root_window;
93
94 XColor *m_colors; ///< color table
95 unsigned int m_num_colors; ///< number of colors in color table
96
97 Visual *m_visual;
98
99 int bits_per_pixel, red_offset, green_offset, blue_offset,
100 red_bits, green_bits, blue_bits;
101 int m_colors_per_channel; ///< number of colors per channel
102 int m_screen_depth; ///< bit depth of screen
103 int m_screen_num; ///< screen number
104 unsigned char red_color_table[256], green_color_table[256],
105 blue_color_table[256];
106 unsigned int *grad_xbuffer, *grad_ybuffer, grad_buffer_width,
107 grad_buffer_height;
108
109 static unsigned long *sqrt_table; /// sqrt lookup table
110
111 typedef struct Cache {
112 Pixmap pixmap;
113
114 unsigned int count, width, height;
115 unsigned long pixel1, pixel2, texture;
116 } Cache;
117
118 unsigned long cache_max;
119 typedef std::list<Cache *> CacheList;
120
121 mutable CacheList cache;
122};
123
124}; // end namespace FbTk
125
126#endif // FBTK_IMAGECONTROL_HH
127