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   // scale available colorspace to match our 256x256x256 cube
  43   _red_bits = 255 / red_mask;
  44   _green_bits = 255 / green_mask;
  45   _blue_bits = 255 / blue_mask;
  46
  47   for (int i = 0; i < 256; i++) {
  48     _red_color_table[i] = i / _red_bits;
  49     _green_color_table[i] = i / _green_bits;
  50     _blue_color_table[i] = i / _blue_bits;
  51   }
  52 }
  53
  54 TrueRenderControl::~TrueRenderControl()
  55 {
  56   printf("Destroying TrueColor RenderControl\n");
  57
  58
  59 }
  60
  61 static inline void renderPixel(XImage *im, unsigned char *dp,
  62                                unsigned long pixel)
  63 {
  64   unsigned int bpp = im->bits_per_pixel + (im->byte_order == MSBFirst ? 1 : 0);
  65
  66   switch (bpp) {
  67   case  8: //  8bpp
  68     *dp++ = pixel;
  69     break;
  70   case 16: // 16bpp LSB
  71     *dp++ = pixel;
  72     *dp++ = pixel >> 8;
  73     break;
  74   case 17: // 16bpp MSB
  75     *dp++ = pixel >> 8;
  76     *dp++ = pixel;
  77     break;
  78   case 24: // 24bpp LSB
  79     *dp++ = pixel;
  80     *dp++ = pixel >> 8;
  81     *dp++ = pixel >> 16;
  82     break;
  83   case 25: // 24bpp MSB
  84     *dp++ = pixel >> 16;
  85     *dp++ = pixel >> 8;
  86     *dp++ = pixel;
  87     break;
  88   case 32: // 32bpp LSB
  89     *dp++ = pixel;
  90     *dp++ = pixel >> 8;
  91     *dp++ = pixel >> 16;
  92     *dp++ = pixel >> 24;
  93     break;
  94   case 33: // 32bpp MSB
  95     *dp++ = pixel >> 24;
  96     *dp++ = pixel >> 16;
  97     *dp++ = pixel >> 8;
  98     *dp++ = pixel;
  99     break;
 100   default:
 101     assert(false); // wtf?
 102   }
 103 }
 104
 105 void TrueRenderControl::render(Surface *sf)
 106 {
 107   assert(sf);
 108
 109   int w = sf->width(), h = sf->height();
 110
 111   XImage *im = XCreateImage(**display, _screen->visual(), _screen->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
 117   for (int y = 0; y < h/3; ++y)
 118     for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8)
 119       renderPixel(im, dp, _red_color_table[255*x/w] << _red_offset);
 120   for (int y = 0; y < h/3; ++y)
 121     for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8)
 122       renderPixel(im, dp, _green_color_table[255*x/w] << _green_offset);
 123   for (int y = 0; y < h/3; ++y)
 124     for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8)
 125       renderPixel(im, dp, _blue_color_table[255*x/w] << _blue_offset);
 126
 127   printf("\nDone %d %d\n", im->bytes_per_line * h, dp - data);
 128
 129   im->data = (char*) data;
 130
 131   if (!sf->_pm)
 132     sf->_pm = XCreatePixmap(**display, _screen->rootWindow(), w, h,
 133                             _screen->depth());
 134   XPutImage(**display, sf->_pm, DefaultGC(**display, _screen->screen()),
 135             im, 0, 0, 0, 0, w, h);
 136
 137   //delete [] image->data;
 138   //image->data = NULL;
 139   XDestroyImage(im);
 140 }
 141
 142 }