Dogcows Code - chaz/openbox/blob - otk/truerendercontrol.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #include "config.h"
   4
   5 #include "truerendercontrol.hh"
   6 #include "display.hh"
   7 #include "screeninfo.hh"
   8 #include "surface.hh"
   9 #include "rendertexture.hh"
  10
  11 extern "C" {
  12 #ifdef    HAVE_STDLIB_H
  13 #  include <stdlib.h>
  14 #endif // HAVE_STDLIB_H
  15
  16 #include "../src/gettext.h"
  17 #define _(str) gettext(str)
  18 }
  19
  20 namespace otk {
  21
  22 TrueRenderControl::TrueRenderControl(int screen)
  23   : RenderControl(screen),
  24     _red_offset(0),
  25     _green_offset(0),
  26     _blue_offset(0)
  27 {
  28   printf("Initializing TrueColor RenderControl\n");
  29
  30   const ScreenInfo *info = display->screenInfo(_screen);
  31   XImage *timage = XCreateImage(**display, info->visual(), info->depth(),
  32                                 ZPixmap, 0, NULL, 1, 1, 32, 0);
  33
  34   unsigned long red_mask, green_mask, blue_mask;
  35
  36   // find the offsets for each color in the visual's masks
  37   red_mask = timage->red_mask;
  38   green_mask = timage->green_mask;
  39   blue_mask = timage->blue_mask;
  40
  41   while (! (red_mask & 1))   { _red_offset++;   red_mask   >>= 1; }
  42   while (! (green_mask & 1)) { _green_offset++; green_mask >>= 1; }
  43   while (! (blue_mask & 1))  { _blue_offset++;  blue_mask  >>= 1; }
  44
  45   _red_shift = _green_shift = _blue_shift = 8;
  46   while (red_mask)   { red_mask   >>= 1; _red_shift--;   }
  47   while (green_mask) { green_mask >>= 1; _green_shift--; }
  48   while (blue_mask)  { blue_mask  >>= 1; _blue_shift--;  }
  49   XFree(timage);
  50 }
  51
  52 TrueRenderControl::~TrueRenderControl()
  53 {
  54   printf("Destroying TrueColor RenderControl\n");
  55 }
  56
  57 void TrueRenderControl::reduceDepth(Surface &sf, XImage *im) const
  58 {
  59   // since pixel32 is the largest possible pixel size, we can share the array
  60   int r, g, b;
  61   int x,y;
  62   pixel32 *data = sf.pixelData();
  63   pixel16 *p = (pixel16*) data;
  64   switch (im->bits_per_pixel) {
  65   case 32:
  66     if ((_red_offset != default_red_shift) ||
  67         (_blue_offset != default_blue_shift) ||
  68         (_green_offset != default_green_shift)) {
  69       printf("cross endian conversion\n");
  70       for (y = 0; y < im->height; y++) {
  71         for (x = 0; x < im->width; x++) {
  72           r = (data[x] >> default_red_shift) & 0xFF;
  73           g = (data[x] >> default_green_shift) & 0xFF;
  74           b = (data[x] >> default_blue_shift) & 0xFF;
  75           data[x] = (r << _red_offset) + (g << _green_offset) +
  76             (b << _blue_offset);
  77         }
  78         data += im->width;
  79       }
  80    }
  81    return;
  82   case 16:
  83     for (y = 0; y < im->height; y++) {
  84       for (x = 0; x < im->width; x++) {
  85         r = (data[x] >> default_red_shift) & 0xFF;
  86         r = r >> _red_shift;
  87         g = (data[x] >> default_green_shift) & 0xFF;
  88         g = g >> _green_shift;
  89         b = (data[x] >> default_blue_shift) & 0xFF;
  90         b = b >> _blue_shift;
  91         p[x] = (r << _red_offset) + (g << _green_offset) + (b << _blue_offset);
  92       }
  93       data += im->width;
  94       p += im->bytes_per_line/2;
  95     }
  96     break;
  97   default:
  98     printf("your bit depth is currently unhandled\n");
  99   }
 100 }
 101
 102 }