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 #include "../src/gettext.h"
  13 #define _(str) gettext(str)
  14 }
  15
  16 #include <cstdlib>
  17
  18 namespace otk {
  19
  20 TrueRenderControl::TrueRenderControl(int screen)
  21   : RenderControl(screen),
  22     _red_offset(0),
  23     _green_offset(0),
  24     _blue_offset(0)
  25 {
  26   printf("Initializing TrueColor RenderControl\n");
  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
  32   unsigned long red_mask, green_mask, blue_mask;
  33
  34   // find the offsets for each color in the visual's masks
  35   red_mask = timage->red_mask;
  36   green_mask = timage->green_mask;
  37   blue_mask = timage->blue_mask;
  38
  39   while (! (red_mask & 1))   { _red_offset++;   red_mask   >>= 1; }
  40   while (! (green_mask & 1)) { _green_offset++; green_mask >>= 1; }
  41   while (! (blue_mask & 1))  { _blue_offset++;  blue_mask  >>= 1; }
  42
  43   _red_shift = _green_shift = _blue_shift = 8;
  44   while (red_mask)   { red_mask   >>= 1; _red_shift--;   }
  45   while (green_mask) { green_mask >>= 1; _green_shift--; }
  46   while (blue_mask)  { blue_mask  >>= 1; _blue_shift--;  }
  47   XFree(timage);
  48 }
  49
  50 TrueRenderControl::~TrueRenderControl()
  51 {
  52   printf("Destroying TrueColor RenderControl\n");
  53 }
  54
  55 void TrueRenderControl::reduceDepth(Surface &sf, XImage *im) const
  56 {
  57   // since pixel32 is the largest possible pixel size, we can share the array
  58   int r, g, b;
  59   int x,y;
  60   pixel32 *data = sf.pixelData();
  61   pixel32 *ret = (pixel32*)malloc(im->width * im->height * 4);
  62   pixel16 *p = (pixel16*) ret;
  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           ret[x] = (r << _red_offset) + (g << _green_offset) +
  75             (b << _blue_offset);
  76         }
  77         data += im->width;
  78       }
  79     } else {
  80       memcpy(ret, data, im->width * im->height * 4);
  81     }
  82     break;
  83   case 16:
  84     for (y = 0; y < im->height; y++) {
  85       for (x = 0; x < im->width; x++) {
  86         r = (data[x] >> default_red_shift) & 0xFF;
  87         r = r >> _red_shift;
  88         g = (data[x] >> default_green_shift) & 0xFF;
  89         g = g >> _green_shift;
  90         b = (data[x] >> default_blue_shift) & 0xFF;
  91         b = b >> _blue_shift;
  92         p[x] = (r << _red_offset) + (g << _green_offset) + (b << _blue_offset);
  93       }
  94       data += im->width;
  95       p += im->bytes_per_line/2;
  96     }
  97     break;
  98   default:
  99     printf("your bit depth is currently unhandled\n");
 100   }
 101   im->data = (char*)ret;
 102 }
 103
 104 void TrueRenderControl::allocateColor(XColor *color) const
 105 {
 106   const ScreenInfo *info = display->screenInfo(_screen);
 107   if (!XAllocColor(**display, info->colormap(), color)) {
 108     fprintf(stderr, "TrueRenderControl: color alloc error: rgb:%x/%x/%x\n",
 109             color->red & 0xff, color->green & 0xff, color->blue & 0xff);
 110     color->pixel = 0;
 111   }
 112 }
 113
 114 }