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 #include "rendertexture.hh"
  12
  13 extern "C" {
  14 #ifdef    HAVE_STDLIB_H
  15 #  include <stdlib.h>
  16 #endif // HAVE_STDLIB_H
  17
  18 #include "gettext.h"
  19 #define _(str) gettext(str)
  20 }
  21
  22 namespace otk {
  23
  24 TrueRenderControl::TrueRenderControl(int screen)
  25   : RenderControl(screen),
  26     _red_offset(0),
  27     _green_offset(0),
  28     _blue_offset(0)
  29 {
  30   printf("Initializing TrueColor RenderControl\n");
  31
  32   Visual *visual = display->screenInfo(_screen)->visual();
  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 = visual->red_mask;
  37   green_mask = visual->green_mask;
  38   blue_mask = visual->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 }
  49
  50 TrueRenderControl::~TrueRenderControl()
  51 {
  52   printf("Destroying TrueColor RenderControl\n");
  53
  54
  55 }
  56
  57
  58 static inline void renderPixel(XImage *im, unsigned char *dp,
  59                                unsigned long pixel)
  60 {
  61   unsigned int bpp = im->bits_per_pixel + (im->byte_order == MSBFirst ? 1 : 0);
  62
  63   switch (bpp) {
  64   case  8: //  8bpp
  65     *dp++ = pixel;
  66     break;
  67   case 16: // 16bpp LSB
  68     *dp++ = pixel;
  69     *dp++ = pixel >> 8;
  70     break;
  71   case 17: // 16bpp MSB
  72     *dp++ = pixel >> 8;
  73     *dp++ = pixel;
  74     break;
  75   case 24: // 24bpp LSB
  76     *dp++ = pixel;
  77     *dp++ = pixel >> 8;
  78     *dp++ = pixel >> 16;
  79     break;
  80   case 25: // 24bpp MSB
  81     *dp++ = pixel >> 16;
  82     *dp++ = pixel >> 8;
  83     *dp++ = pixel;
  84     break;
  85   case 32: // 32bpp LSB
  86     *dp++ = pixel;
  87     *dp++ = pixel >> 8;
  88     *dp++ = pixel >> 16;
  89     *dp++ = pixel >> 24;
  90     break;
  91   case 33: // 32bpp MSB
  92     *dp++ = pixel >> 24;
  93     *dp++ = pixel >> 16;
  94     *dp++ = pixel >> 8;
  95     *dp++ = pixel;
  96     break;
  97   default:
  98     assert(false); // wtf?
  99   }
 100 }
 101
 102 void TrueRenderControl::drawBackground(Surface& sf,
 103                                        const RenderTexture &texture) const
 104 {
 105   assert(sf._screen == _screen);
 106
 107   int w = sf.width(), h = sf.height();
 108
 109   const ScreenInfo *info = display->screenInfo(_screen);
 110   XImage *im = XCreateImage(**display, info->visual(), info->depth(),
 111                             ZPixmap, 0, NULL, w, h, 32, 0);
 112
 113   unsigned char *data = new unsigned char[im->bytes_per_line * h];
 114   unsigned char *dp = data;
 115   unsigned int bytes_per_pixel = im->bits_per_pixel/8;
 116
 117   for (int y = 0; y < h/3; ++y)
 118     for (int x = 0; x < w; ++x, dp += bytes_per_pixel)
 119       renderPixel(im, dp, (255*x/w) >> _red_shift << _red_offset);
 120   for (int y = 0; y < h/3; ++y)
 121     for (int x = 0; x < w; ++x, dp += bytes_per_pixel)
 122       renderPixel(im, dp, (255*x/w) >> _green_shift << _green_offset);
 123   for (int y = 0; y < h/3; ++y)
 124     for (int x = 0; x < w; ++x, dp += bytes_per_pixel)
 125       renderPixel(im, dp, (255*x/w) >> _blue_shift << _blue_offset);
 126
 127   im->data = (char*) data;
 128
 129 //  sf.setPixmap(im);
 130   sf.setPixmap(texture.color());
 131 //  sf.setPixmap(RenderColor(_screen, 0xff, 0xff, 0));
 132
 133   delete [] im->data;
 134   im->data = NULL;
 135   XDestroyImage(im);}
 136 }