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   const ScreenInfo *info = display->screenInfo(_screen);
  29   XImage *timage = XCreateImage(**display, info->visual(), info->depth(),
  30                                 ZPixmap, 0, NULL, 1, 1, 32, 0);
  31   printf("Initializing TrueColor RenderControl\n");
  32
  33   unsigned long red_mask, green_mask, blue_mask;
  34
  35   // find the offsets for each color in the visual's masks
  36   red_mask = timage->red_mask;
  37   green_mask = timage->green_mask;
  38   blue_mask = timage->blue_mask;
  39
  40   while (! (red_mask & 1))   { _red_offset++;   red_mask   >>= 1; }
  41   while (! (green_mask & 1)) { _green_offset++; green_mask >>= 1; }
  42   while (! (blue_mask & 1))  { _blue_offset++;  blue_mask  >>= 1; }
  43
  44   _red_shift = _green_shift = _blue_shift = 8;
  45   while (red_mask)   { red_mask   >>= 1; _red_shift--;   }
  46   while (green_mask) { green_mask >>= 1; _green_shift--; }
  47   while (blue_mask)  { blue_mask  >>= 1; _blue_shift--;  }
  48   XFree(timage);
  49 }
  50
  51 TrueRenderControl::~TrueRenderControl()
  52 {
  53   printf("Destroying TrueColor RenderControl\n");
  54 }
  55
  56 void TrueRenderControl::reduceDepth(Surface &sf, XImage *im) const
  57 {
  58 // since pixel32 is the largest possible pixel size, we can share the array
  59   int r, g, b;
  60   int x,y;
  61   pixel32 *data = sf.pixelData();
  62   pixel16 *p = (pixel16*) data;
  63   switch (im->bits_per_pixel) {
  64   case 32:
  65     if ((_red_offset != default_red_shift) ||
  66         (_blue_offset != default_blue_shift) ||
  67         (_green_offset != default_green_shift)) {
  68       printf("cross endian conversion\n");
  69       for (y = 0; y < im->height; y++) {
  70         for (x = 0; x < im->width; x++) {
  71           r = (data[x] >> default_red_shift) & 0xFF;
  72           g = (data[x] >> default_green_shift) & 0xFF;
  73           b = (data[x] >> default_blue_shift) & 0xFF;
  74           data[x] = (r << _red_offset) + (g << _green_offset) +
  75             (b << _blue_offset);
  76         }
  77         data += im->width;
  78       }
  79    }
  80    return;
  81   case 16:
  82     for (y = 0; y < im->height; y++) {
  83       for (x = 0; x < im->width; x++) {
  84         r = (data[x] >> default_red_shift) & 0xFF;
  85         r = r >> _red_shift;
  86         g = (data[x] >> default_green_shift) & 0xFF;
  87         g = g >> _green_shift;
  88         b = (data[x] >> default_blue_shift) & 0xFF;
  89         b = b >> _blue_shift;
  90         p[x] = (r << _red_offset) + (g << _green_offset) + (b << _blue_offset);
  91       }
  92       data += im->width;
  93       p += im->bytes_per_line/2;
  94     }
  95     break;
  96   default:
  97     printf("your bit depth is currently unhandled\n");
  98   }
  99 }
 100
 101 }