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(int 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   Visual *visual = display->screenInfo(_screen)->visual();
  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 = visual->red_mask;
  36   green_mask = visual->green_mask;
  37   blue_mask = visual->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 }
  48
  49 TrueRenderControl::~TrueRenderControl()
  50 {
  51   printf("Destroying TrueColor RenderControl\n");
  52
  53
  54 }
  55
  56
  57 static inline void renderPixel(XImage *im, unsigned char *dp,
  58                                unsigned long pixel)
  59 {
  60   unsigned int bpp = im->bits_per_pixel + (im->byte_order == MSBFirst ? 1 : 0);
  61
  62   switch (bpp) {
  63   case  8: //  8bpp
  64     *dp++ = pixel;
  65     break;
  66   case 16: // 16bpp LSB
  67     *dp++ = pixel;
  68     *dp++ = pixel >> 8;
  69     break;
  70   case 17: // 16bpp MSB
  71     *dp++ = pixel >> 8;
  72     *dp++ = pixel;
  73     break;
  74   case 24: // 24bpp LSB
  75     *dp++ = pixel;
  76     *dp++ = pixel >> 8;
  77     *dp++ = pixel >> 16;
  78     break;
  79   case 25: // 24bpp MSB
  80     *dp++ = pixel >> 16;
  81     *dp++ = pixel >> 8;
  82     *dp++ = pixel;
  83     break;
  84   case 32: // 32bpp LSB
  85     *dp++ = pixel;
  86     *dp++ = pixel >> 8;
  87     *dp++ = pixel >> 16;
  88     *dp++ = pixel >> 24;
  89     break;
  90   case 33: // 32bpp MSB
  91     *dp++ = pixel >> 24;
  92     *dp++ = pixel >> 16;
  93     *dp++ = pixel >> 8;
  94     *dp++ = pixel;
  95     break;
  96   default:
  97     assert(false); // wtf?
  98   }
  99 }
 100
 101 void TrueRenderControl::drawBackground(Surface& sf,
 102                                        const RenderTexture &texture) const
 103 {
 104   (void)texture;
 105
 106   assert(sf._screen == _screen);
 107
 108   int w = sf.width(), h = sf.height();
 109
 110   const ScreenInfo *info = display->screenInfo(_screen);
 111   XImage *im = XCreateImage(**display, info->visual(), info->depth(),
 112                             ZPixmap, 0, NULL, w, h, 32, 0);
 113
 114   unsigned char *data = new unsigned char[im->bytes_per_line * h];
 115   unsigned char *dp = data;
 116   unsigned int bytes_per_pixel = im->bits_per_pixel/8;
 117
 118   for (int y = 0; y < h/3; ++y)
 119     for (int x = 0; x < w; ++x, dp += bytes_per_pixel)
 120       renderPixel(im, dp, (255*x/w) >> _red_shift << _red_offset);
 121   for (int y = 0; y < h/3; ++y)
 122     for (int x = 0; x < w; ++x, dp += bytes_per_pixel)
 123       renderPixel(im, dp, (255*x/w) >> _green_shift << _green_offset);
 124   for (int y = 0; y < h/3; ++y)
 125     for (int x = 0; x < w; ++x, dp += bytes_per_pixel)
 126       renderPixel(im, dp, (255*x/w) >> _blue_shift << _blue_offset);
 127
 128   im->data = (char*) data;
 129
 130   sf.setPixmap(im);
 131
 132   delete [] im->data;
 133   im->data = NULL;
 134   XDestroyImage(im);}
 135 }