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
  11 extern "C" {
  12 #ifdef    HAVE_STDLIB_H
  13 #  include <stdlib.h>
  14 #endif // HAVE_STDLIB_H
  15
  16 #include "gettext.h"
  17 #define _(str) gettext(str)
  18 }
  19
  20 namespace otk {
  21
  22 TrueRenderControl::TrueRenderControl(const ScreenInfo *screen)
  23   : RenderControl(screen)
  24 {
  25   printf("Initializing TrueColor RenderControl\n");
  26
  27   unsigned long red_mask, green_mask, blue_mask;
  28
  29   // find the offsets for each color in the visual's masks
  30   red_mask = screen->visual()->red_mask;
  31   green_mask = screen->visual()->green_mask;
  32   blue_mask = screen->visual()->blue_mask;
  33
  34   while (! (red_mask & 1)) { _red_offset++; red_mask >>= 1; }
  35   while (! (green_mask & 1)) { _green_offset++; green_mask >>= 1; }
  36   while (! (blue_mask & 1)) { _blue_offset++; blue_mask >>= 1; }
  37
  38   // use the mask to determine the number of bits for each shade of color
  39   // so, best case, red_mask == 0xff (255), with each bit as a different
  40   // shade!
  41   _red_bits = 255 / red_mask;
  42   _green_bits = 255 / green_mask;
  43   _blue_bits = 255 / blue_mask;
  44
  45   // compute color tables, based on the number of bits for each shade
  46   for (int i = 0; i < 256; i++) {
  47     _red_color_table[i] = i / _red_bits;
  48     _green_color_table[i] = i / _green_bits;
  49     _blue_color_table[i] = i / _blue_bits;
  50   }
  51 }
  52
  53 TrueRenderControl::~TrueRenderControl()
  54 {
  55   printf("Destroying TrueColor RenderControl\n");
  56
  57
  58 }
  59
  60 void TrueRenderControl::render(::Drawable d)
  61 {
  62   XGCValues gcv;
  63   gcv.cap_style = CapProjecting;
  64
  65   int w = 255, h = 32;
  66   Pixmap p = XCreatePixmap(**display, d, w, h, _screen->depth());
  67   XImage *im = XCreateImage(**display, _screen->visual(), _screen->depth(),
  68                             ZPixmap, 0, NULL, w, h, 32, 0);
  69   //GC gc = XCreateGC(**display, _screen->rootWindow(), GCCapStyle, &gcv);
  70
  71   im->data = new char[im->bytes_per_line * (h + 1)]; // XXX  + 1?
  72   char *dp = im->data;
  73
  74   for (int x = 0; x < w; ++x, ++dp)
  75     *dp = 0;
  76   for (int y = 0; y < 10; ++h)
  77     for (int x = 0; x < w; ++x, ++dp)
  78       *dp = _red_color_table[x] << _red_offset;
  79   for (int y = 0; y < 10; ++h)
  80     for (int x = 0; x < w; ++x, ++dp)
  81       *dp = _green_color_table[x] << _green_offset;
  82   for (int y = 0; y < 10; ++h)
  83     for (int x = 0; x < w; ++x, ++dp)
  84       *dp = _blue_color_table[x] << _blue_offset;
  85   for (int x = 0; x < w; ++x, ++dp)
  86     *dp = 0;
  87
  88   XPutImage(**display, p, DefaultGC(**display, _screen->screen()),
  89             im, 0, 0, 0, 0, w, h);
  90
  91   //delete [] image->data;
  92   //image->data = NULL;
  93   XDestroyImage(im);
  94
  95   XCopyArea(**display, p, d, DefaultGC(**display, _screen->screen()),
  96             0, 0, w, h,  0, 0);
  97
  98   XFreePixmap(**display, p);
  99 }
 100
 101 }