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

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #ifdef    HAVE_CONFIG_H
   4 #  include "../config.h"
   5 #endif // HAVE_CONFIG_H
   6
   7 #include "truerendercontrol.hh"
   8 #include "display.hh"
   9 #include "screeninfo.hh"
  10 #include "surface.hh"
  11
  12 extern "C" {
  13 #ifdef    HAVE_STDLIB_H
  14 #  include <stdlib.h>
  15 #endif // HAVE_STDLIB_H
  16
  17 #include "gettext.h"
  18 #define _(str) gettext(str)
  19 }
  20
  21 namespace otk {
  22
  23 TrueRenderControl::TrueRenderControl(const ScreenInfo *screen)
  24   : RenderControl(screen),
  25     _red_offset(0),
  26     _green_offset(0),
  27     _blue_offset(0)
  28 {
  29   printf("Initializing TrueColor RenderControl\n");
  30
  31   unsigned long red_mask, green_mask, blue_mask;
  32
  33   // find the offsets for each color in the visual's masks
  34   red_mask = screen->visual()->red_mask;
  35   green_mask = screen->visual()->green_mask;
  36   blue_mask = screen->visual()->blue_mask;
  37
  38   while (! (red_mask & 1))   { _red_offset++;   red_mask   >>= 1; }
  39   while (! (green_mask & 1)) { _green_offset++; green_mask >>= 1; }
  40   while (! (blue_mask & 1))  { _blue_offset++;  blue_mask  >>= 1; }
  41
  42   _red_shift = _green_shift = _blue_shift = 8;
  43   while (red_mask)   { red_mask   >>= 1; _red_shift--;   }
  44   while (green_mask) { green_mask >>= 1; _green_shift--; }
  45   while (blue_mask)  { blue_mask  >>= 1; _blue_shift--;  }
  46 }
  47
  48 TrueRenderControl::~TrueRenderControl()
  49 {
  50   printf("Destroying TrueColor RenderControl\n");
  51
  52
  53 }
  54
  55 static inline void renderPixel(XImage *im, unsigned char *dp,
  56                                unsigned long pixel)
  57 {
  58   unsigned int bpp = im->bits_per_pixel + (im->byte_order == MSBFirst ? 1 : 0);
  59
  60   switch (bpp) {
  61   case  8: //  8bpp
  62     *dp++ = pixel;
  63     break;
  64   case 16: // 16bpp LSB
  65     *dp++ = pixel;
  66     *dp++ = pixel >> 8;
  67     break;
  68   case 17: // 16bpp MSB
  69     *dp++ = pixel >> 8;
  70     *dp++ = pixel;
  71     break;
  72   case 24: // 24bpp LSB
  73     *dp++ = pixel;
  74     *dp++ = pixel >> 8;
  75     *dp++ = pixel >> 16;
  76     break;
  77   case 25: // 24bpp MSB
  78     *dp++ = pixel >> 16;
  79     *dp++ = pixel >> 8;
  80     *dp++ = pixel;
  81     break;
  82   case 32: // 32bpp LSB
  83     *dp++ = pixel;
  84     *dp++ = pixel >> 8;
  85     *dp++ = pixel >> 16;
  86     *dp++ = pixel >> 24;
  87     break;
  88   case 33: // 32bpp MSB
  89     *dp++ = pixel >> 24;
  90     *dp++ = pixel >> 16;
  91     *dp++ = pixel >> 8;
  92     *dp++ = pixel;
  93     break;
  94   default:
  95     assert(false); // wtf?
  96   }
  97 }
  98
  99 void TrueRenderControl::drawBackground(Surface *sf,
 100                                        const RenderTexture &texture) const
 101 {
 102   assert(sf);
 103
 104   int w = sf->width(), h = sf->height();
 105
 106   XImage *im = XCreateImage(**display, _screen->visual(), _screen->depth(),
 107                             ZPixmap, 0, NULL, w, h, 32, 0);
 108
 109   unsigned char *data = new unsigned char[im->bytes_per_line * h];
 110   unsigned char *dp = data;
 111
 112   for (int y = 0; y < h/3; ++y)
 113     for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8)
 114       renderPixel(im, dp, (255*x/w) << _red_offset << _red_shift);
 115   for (int y = 0; y < h/3; ++y)
 116     for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8)
 117       renderPixel(im, dp, (255*x/w) << _green_offset << _green_shift);
 118   for (int y = 0; y < h/3; ++y)
 119     for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8)
 120       renderPixel(im, dp, (255*x/w) << _blue_offset << _blue_shift);
 121
 122   im->data = (char*) data;
 123
 124   if (!sf->_pm)
 125     sf->_pm = XCreatePixmap(**display, _screen->rootWindow(), w, h,
 126                             _screen->depth());
 127   XPutImage(**display, sf->_pm, DefaultGC(**display, _screen->screen()),
 128             im, 0, 0, 0, 0, w, h);
 129
 130   //delete [] image->data;
 131   //image->data = NULL;
 132   XDestroyImage(im);
 133 }
 134
 135 }