psychlops/platform/gl/psychlops_g_cache.cpp

   1 #include <vector>\r
   2 #include <string>
   3 \r
   4 #if defined(__APPLE__)\r
   5 #include <OpenGL/gl.h>
   6 #else\r
   7 #include <windows.h>
   8 #include <gl/gl.h>
   9 #endif\r
  10 \r
  11 #include "psychlops_g_cache.h"\r
  12 \r
  13 namespace Psychlops {\r
  14 namespace Utilities {\r
  15 \r
  16 \r
  17         ////////        TextCacheAllocation     ////////\r
  18         CacheOnImage::CacheOnImage() {  }\r
  19         CacheOnImage::~CacheOnImage() { uncache(); }\r
  20         void CacheOnImage::dirty() { dirty_ = true; }\r
  21         void CacheOnImage::uncache()\r
  22         {\r
  23                 img.release();\r
  24         }\r
  25         void CacheOnImage::draw(\r
  26                 Letters &drawee, const double xx, const double yy,\r
  27                 const double r, const double g, const double b, const double a,\r
  28                 const int horiz_align, const int vertical_align, const double max_width, Drawable &outer)\r
  29         {\r
  30                 const int anchor = horiz_align, vertical_anchor = vertical_align;\r
  31                 double mx = xx, my = yy;\r
  32                 //double mx = drawee.getDatum().x, my = drawee.getDatum().y;\r
  33 \r
  34                 double x, y;\r
  35                 switch(anchor) {\r
  36                         case Letters::TEXT_ALIGN_CENTER:\r
  37                                 x = mx - img.getWidth() / 2;\r
  38                                 break;\r
  39                         case Letters::TEXT_ALIGN_RIGHT:\r
  40                                 x = mx - img.getWidth();\r
  41                                 break;\r
  42                         case Letters::NOT_SPECIFIED:\r
  43                         case Letters::TEXT_ALIGN_LEFT:\r
  44                         default:\r
  45                                 x = mx;\r
  46                                 break;\r
  47                 }\r
  48                 switch(vertical_anchor) {\r
  49                         case Letters::TEXT_ALIGN_MIDDLE:\r
  50                                 y = my;\r
  51                                 img.centering(x, y);\r
  52                                 break;\r
  53                         case Letters::TEXT_ALIGN_TOP:\r
  54                                 y = my;\r
  55                                 img.move_to(x, y);\r
  56                                 break;\r
  57                         default:\r
  58                                 y = my - drawee.font.size;\r
  59                                 img.move_to(x, y);\r
  60                                 break;\r
  61                 }\r
  62                 //img.draw(outer);\r
  63 \r
  64                 Color col(r,g,b,a);\r
  65                 Rectangle targetarea(img.getLeft(), img.getTop(), img.getRight(), img.getBottom());\r
  66                 const Color zero_alpha(1,1,1,0,false);\r
  67                 glPushAttrib(GL_COLOR_BUFFER_BIT);\r
  68                 //img.move_to(posX, posY-cache_baseY);\r
  69 \r
  70                 // clear destination alpha\r
  71                 glBlendFunc(GL_ZERO, GL_SRC_COLOR);\r
  72                 targetarea.draw(zero_alpha, outer);\r
  73 \r
  74                 // draw font in alpha channel\r
  75                 glBlendFunc(GL_ONE, GL_ONE);\r
  76                 img.draw(outer);\r
  77 \r
  78                 // apply alpha factor\r
  79                 if(a!=1) {\r
  80                         Color alpha_mask(1,1,1,a,false);\r
  81                         glBlendFunc(GL_ZERO, GL_SRC_COLOR);\r
  82                         targetarea.draw(alpha_mask, outer);\r
  83                 }\r
  84 \r
  85                 // drawing in specified color by destination alpha\r
  86                 glBlendFunc(GL_DST_ALPHA, GL_ONE_MINUS_DST_ALPHA);\r
  87                 targetarea.draw(col, outer);\r
  88 \r
  89                 //              glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);\r
  90                 glPopAttrib();\r
  91         }\r
  92 \r
  93 \r
  94         ////////        TextCacheManager        ////////\r
  95         bool TextCacheManager::isCached(Letters *letters)\r
  96         {\r
  97                 return (map.count(letters) != 0);// && !(image_cache[img].dirty_);\r
  98         }\r
  99         void TextCacheManager::cache(Letters *letters, CacheOnImage *allocation)\r
 100         {\r
 101                 map[letters] = allocation;\r
 102         }\r
 103         void TextCacheManager::uncache(Letters *letters)\r
 104         {\r
 105                 if( isCached(letters) ) {\r
 106                         map[letters]->uncache();\r
 107                         map.erase(letters);\r
 108                 }\r
 109         }\r
 110         void TextCacheManager::uncacheAll()\r
 111         {\r
 112                 map.clear();\r
 113         }\r
 114 \r
 115 \r
 116 }
 117 }       /*      <- namespace Psycholops         */
 118 \r