1 // Transparent.hh for FbTk - Fluxbox Toolkit 2 // Copyright (c) 2003 Henrik Kinnunen (fluxgen at fluxbox dot org) 3 // 4 // Permission is hereby granted, free of charge, to any person obtaining a 5 // copy of this software and associated documentation files (the "Software"), 6 // to deal in the Software without restriction, including without limitation 7 // the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 // and/or sell copies of the Software, and to permit persons to whom the 9 // Software is furnished to do so, subject to the following conditions: 10 // 11 // The above copyright notice and this permission notice shall be included in 12 // all copies or substantial portions of the Software. 13 // 14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 19 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 20 // DEALINGS IN THE SOFTWARE. 21 22 // $Id: Transparent.hh 3932 2005-04-10 18:18:14Z simonb $ 23 24 #ifndef FBTK_TRANSPARENT_HH 25 #define FBTK_TRANSPARENT_HH 26 27 #include <X11/Xlib.h> 28 29 namespace FbTk { 30 31 /// renders to drawable together with an alpha mask 32 class Transparent { 33 public: 34 Transparent(Drawable source, Drawable dest, unsigned char alpha, int screen_num); 35 ~Transparent(); 36 /// sets alpha value 37 void setAlpha(unsigned char alpha); 38 /// sets source drawable 39 void setSource(Drawable src, int screen_num); 40 /// sets destination drawable 41 void setDest(Drawable dest, int screen_num); 42 void freeDest(); 43 /** 44 renders to dest from src with specified coordinates and size 45 */ 46 void render(int src_x, int src_y, 47 int dest_x, int dest_y, 48 unsigned int width, unsigned int height) const; 49 alpha() const50 unsigned char alpha() const { return m_alpha; } dest() const51 Drawable dest() const { return m_dest; } source() const52 Drawable source() const { return m_source; } 53 54 static bool haveComposite(bool for_real = false); haveRender()55 static bool haveRender() { if (!s_init) init(); return s_render; } 56 static void usePseudoTransparent(bool no_composite); 57 58 private: 59 void freeAlpha(); 60 void allocAlpha(unsigned char newval); 61 unsigned long m_alpha_pic; 62 unsigned long m_src_pic; 63 unsigned long m_dest_pic; 64 Drawable m_source, m_dest; 65 unsigned char m_alpha; 66 67 static bool s_init; 68 static bool s_render; ///< wheter we have RENDER support 69 static bool s_composite; ///< wheter we have Composite support 70 static void init(); 71 }; 72 73 }; // end namespace FbTk 74 75 #endif // FBTK_TRANSPARENT_HH 76 77