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 "widget.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 {
  26   printf("Initializing TrueColor RenderControl\n");
  27
  28   unsigned long red_mask, green_mask, blue_mask;
  29
  30   // find the offsets for each color in the visual's masks
  31   red_mask = screen->visual()->red_mask;
  32   green_mask = screen->visual()->green_mask;
  33   blue_mask = screen->visual()->blue_mask;
  34
  35   while (! (red_mask & 1)) { _red_offset++; red_mask >>= 1; }
  36   while (! (green_mask & 1)) { _green_offset++; green_mask >>= 1; }
  37   while (! (blue_mask & 1)) { _blue_offset++; blue_mask >>= 1; }
  38
  39   // use the mask to determine the number of bits for each shade of color
  40   // so, best case, red_mask == 0xff (255), with each bit as a different
  41   // shade!
  42   _red_bits = 255 / red_mask;
  43   _green_bits = 255 / green_mask;
  44   _blue_bits = 255 / blue_mask;
  45
  46   // compute color tables, based on the number of bits for each shade
  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
  62 void assignPixel(unsigned int bit_depth, unsigned char **data,  unsigned long pixel) {
  63   unsigned char *pixel_data = *data;
  64   switch (bit_depth) {
  65   case  8: //  8bpp
  66     *pixel_data++ = pixel;
  67     break;
  68
  69   case 16: // 16bpp LSB
  70     *pixel_data++ = pixel;
  71     *pixel_data++ = pixel >> 8;
  72     break;
  73
  74   case 17: // 16bpp MSB
  75     *pixel_data++ = pixel >> 8;
  76     *pixel_data++ = pixel;
  77     break;
  78
  79   case 24: // 24bpp LSB
  80     *pixel_data++ = pixel;
  81     *pixel_data++ = pixel >> 8;
  82     *pixel_data++ = pixel >> 16;
  83     break;
  84
  85   case 25: // 24bpp MSB
  86     *pixel_data++ = pixel >> 16;
  87     *pixel_data++ = pixel >> 8;
  88     *pixel_data++ = pixel;
  89     break;
  90
  91   case 32: // 32bpp LSB
  92     *pixel_data++ = pixel;
  93     *pixel_data++ = pixel >> 8;
  94     *pixel_data++ = pixel >> 16;
  95     *pixel_data++ = pixel >> 24;
  96     break;
  97
  98   case 33: // 32bpp MSB
  99     *pixel_data++ = pixel >> 24;
 100     *pixel_data++ = pixel >> 16;
 101     *pixel_data++ = pixel >> 8;
 102     *pixel_data++ = pixel;
 103     break;
 104   }
 105   *data = pixel_data; // assign back so we don't lose our place
 106 }
 107
 108 void renderPixel(XImage *im, unsigned char *dp, unsigned long pixel)
 109 {
 110   unsigned int bpp = im->bits_per_pixel + (im->byte_order == MSBFirst) ? 1 : 0;
 111
 112   switch (bpp) {
 113   case  8: //  8bpp
 114     *dp++ = pixel;
 115     break;
 116   case 16: // 16bpp LSB
 117     *dp++ = pixel;
 118     *dp++ = pixel >> 8;
 119     break;
 120   case 17: // 16bpp MSB
 121     *dp++ = pixel >> 8;
 122     *dp++ = pixel;
 123     break;
 124   case 24: // 24bpp LSB
 125     *dp++ = pixel;
 126     *dp++ = pixel >> 8;
 127     *dp++ = pixel >> 16;
 128     break;
 129   case 25: // 24bpp MSB
 130     *dp++ = pixel >> 16;
 131     *dp++ = pixel >> 8;
 132     *dp++ = pixel;
 133     break;
 134   case 32: // 32bpp LSB
 135     *dp++ = pixel;
 136     *dp++ = pixel >> 8;
 137     *dp++ = pixel >> 16;
 138     *dp++ = pixel >> 24;
 139     break;
 140   case 33: // 32bpp MSB
 141     *dp++ = pixel >> 24;
 142     *dp++ = pixel >> 16;
 143     *dp++ = pixel >> 8;
 144     *dp++ = pixel;
 145     break;
 146   }
 147 }
 148
 149 void TrueRenderControl::render(Widget *wi)
 150 {
 151   assert(wi);
 152
 153   XGCValues gcv;
 154   gcv.cap_style = CapProjecting;
 155
 156   int w = 255, h = 31;
 157   Pixmap p = XCreatePixmap(**display, wi->window(), w, h, _screen->depth());
 158   XImage *im = XCreateImage(**display, _screen->visual(), _screen->depth(),
 159                             ZPixmap, 0, NULL, w, h, 32, 0);
 160   //GC gc = XCreateGC(**display, _screen->rootWindow(), GCCapStyle, &gcv);
 161
 162   // XXX  + 1?
 163   unsigned char *data = new unsigned char[im->bytes_per_line * (h + 1)];
 164   unsigned char *dp = data;
 165
 166   for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8)
 167     renderPixel(im, dp, 0);
 168   for (int y = 0; y < 10; ++y)
 169     for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8)
 170       renderPixel(im, dp, _red_color_table[x] << _red_offset);
 171   for (int y = 0; y < 10; ++y)
 172     for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8)
 173       renderPixel(im, dp, _green_color_table[x] << _green_offset);
 174   for (int y = 0; y < 10; ++y)
 175     for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8)
 176       renderPixel(im, dp, _blue_color_table[x] << _blue_offset);
 177
 178   printf("\nDone\n");
 179
 180   im->data = (char*) data;
 181
 182   XPutImage(**display, p, DefaultGC(**display, _screen->screen()),
 183             im, 0, 0, 0, 0, w, h);
 184
 185   //delete [] image->data;
 186   //image->data = NULL;
 187   XDestroyImage(im);
 188
 189   XSetWindowBackgroundPixmap(**display, wi->window(), p);
 190   XClearWindow(**display, wi->window());
 191
 192   XFreePixmap(**display, p);
 193 }
 194
 195 }