Warning, /include/Geant4/toolx/X11/colors is written in an unsupported language. File is not indexed.
0001 // Copyright (C) 2010, Guy Barrand. All rights reserved.
0002 // See the file tools.license for terms.
0003
0004 #ifndef toolx_X11_colors
0005 #define toolx_X11_colors
0006
0007 #include <X11/Xlib.h>
0008 #include <vector>
0009 #include <map>
0010
0011 namespace toolx {
0012 namespace X11 {
0013
0014 typedef unsigned long Pixel;
0015 typedef std::vector<Pixel> pixels_t;
0016
0017 typedef unsigned int rgb_t;
0018 typedef std::map<rgb_t,Pixel> colors_t;
0019
0020 inline bool rgb2pixel(Display* a_display,unsigned int a_monitor,
0021 unsigned char a_r,unsigned char a_g,unsigned char a_b,
0022 Pixel& a_pixel,bool& a_allocated) {
0023 // read_write visual class: PseudoColor, GrayScale, DirectColor.
0024 // read_only visual class: TrueColor, StaticColor, StaticGray.
0025 // Could allocate a read_only cell in a read_write, read_only visual class.
0026 // Could allocate a read_write cell only in read_write visual class.
0027 // StaticGray + (depth=1) is monochrome.
0028
0029 Screen* screen = ::XScreenOfDisplay(a_display,a_monitor);
0030 int vclass = ::XDefaultVisualOfScreen(screen)->c_class;
0031 Colormap cmap = ::XDefaultColormapOfScreen(screen);
0032
0033 bool is_grey = ((vclass==GrayScale) || (vclass==StaticGray) ) ? true : false;
0034
0035 float r = float(a_r)/255.0f;
0036 float g = float(a_g)/255.0f;
0037 float b = float(a_b)/255.0f;
0038
0039 XColor xcolor;
0040 xcolor.pixel = 0L;
0041 if(is_grey) {
0042 float grey = 0.30f * r + 0.59f * g + 0.11f * b;
0043 xcolor.red = (unsigned short) (grey * 0xffff);
0044 xcolor.green = (unsigned short) (grey * 0xffff);
0045 xcolor.blue = (unsigned short) (grey * 0xffff);
0046 } else {
0047 xcolor.red = (unsigned short) (r * 0xffff);
0048 xcolor.green = (unsigned short) (g * 0xffff);
0049 xcolor.blue = (unsigned short) (b * 0xffff);
0050 }
0051
0052 // Could be done on read_only/read_write visual class.
0053 // Cell is taken from a common pool. It is read only.
0054 if(::XAllocColor(a_display,cmap,&xcolor)==0) {
0055 // Color not found. Try to allocate a private color cell :
0056 if((vclass==TrueColor)||(vclass==StaticColor)||(vclass==StaticGray)) { //Viusal class is read_only.
0057 a_pixel = 0;
0058 a_allocated = false;
0059 return false;
0060 }
0061 if(::XAllocColorCells(a_display,cmap,False,NULL,0,&(xcolor.pixel),1)==0) { //read/write cell.
0062 a_pixel = 0;
0063 a_allocated = false;
0064 return false;
0065 }
0066 xcolor.flags = DoRed|DoGreen|DoBlue;
0067 ::XStoreColor(a_display,cmap,&xcolor);
0068 a_pixel = xcolor.pixel;
0069 a_allocated = true;
0070 } else {
0071 a_pixel = xcolor.pixel;
0072 a_allocated = false;
0073 }
0074
0075 return true;
0076 }
0077
0078 inline bool get_pixel(Display* a_display,unsigned int a_monitor,
0079 pixels_t& a_pixels,colors_t& a_colors,
0080 unsigned int a_rgba,
0081 Pixel& a_pixel) {
0082 colors_t::const_iterator it = a_colors.find(a_rgba);
0083 if(it!=a_colors.end()) {a_pixel = (*it).second;return true;}
0084 unsigned char* pos = (unsigned char*)&a_rgba;
0085 bool allocated;
0086 if(!rgb2pixel(a_display,a_monitor,*(pos+0),*(pos+1),*(pos+2),a_pixel,allocated)) {
0087 Screen* screen = ::XScreenOfDisplay(a_display,a_monitor);
0088 a_pixel = XWhitePixelOfScreen(screen);
0089 return false;
0090 }
0091 if(allocated) a_pixels.push_back(a_pixel);
0092 a_colors[a_rgba] = a_pixel;
0093 return true;
0094 }
0095
0096 inline void set_rgb_t(unsigned char a_r,unsigned char a_g,unsigned char a_b,rgb_t& a_rgb) {
0097 unsigned char* pos = (unsigned char*)&a_rgb;
0098 *pos = a_r;pos++;
0099 *pos = a_g;pos++;
0100 *pos = a_b;pos++;
0101 *pos = 0;pos++;
0102 }
0103
0104 inline bool set_foreground(Display* a_display,unsigned int a_monitor,GC a_gc,pixels_t& a_pixels,colors_t& a_colors,unsigned char a_r,unsigned char a_g,unsigned char a_b) {
0105 Pixel pixel;
0106 rgb_t rgb;
0107 set_rgb_t(a_r,a_g,a_b,rgb);
0108 if(!get_pixel(a_display,a_monitor,a_pixels,a_colors,rgb,pixel)) return false;
0109 XGCValues gcv;
0110 gcv.foreground = pixel;
0111 if(::XChangeGC(a_display,a_gc,GCForeground,&gcv)==0) return false;
0112 return true;
0113 }
0114
0115 inline bool set_foregroundf(Display* a_display,unsigned int a_monitor,GC a_gc,pixels_t& a_pixels,colors_t& a_colors,float a_r,float a_g,float a_b) {
0116 return set_foreground(a_display,a_monitor,a_gc,a_pixels,a_colors,a_r*255.0f,a_g*255.0f,a_b*255.0f);
0117 }
0118
0119 }}
0120
0121
0122 #endif
