Dogcows Code - chaz/openbox/blob - otk/truerendercontrol.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #include "config.h"
   4
   5 #include "truerendercontrol.hh"
   6 #include "display.hh"
   7 #include "screeninfo.hh"
   8 #include "surface.hh"
   9 #include "rendertexture.hh"
  10
  11 extern "C" {
  12 #ifdef    HAVE_STDLIB_H
  13 #  include <stdlib.h>
  14 #endif // HAVE_STDLIB_H
  15
  16 #include "../src/gettext.h"
  17 #define _(str) gettext(str)
  18 }
  19
  20 namespace otk {
  21
  22 TrueRenderControl::TrueRenderControl(int screen)
  23   : RenderControl(screen),
  24     _red_offset(0),
  25     _green_offset(0),
  26     _blue_offset(0)
  27 {
  28   const ScreenInfo *info = display->screenInfo(_screen);
  29   XImage *timage = XCreateImage(**display, info->visual(), info->depth(),
  30                                 ZPixmap, 0, NULL, 1, 1, 32, 0);
  31   printf("Initializing TrueColor RenderControl\n");
  32
  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 = timage->red_mask;
  37   green_mask = timage->green_mask;
  38   blue_mask = timage->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   XFree(timage);
  49 }
  50
  51 TrueRenderControl::~TrueRenderControl()
  52 {
  53   printf("Destroying TrueColor RenderControl\n");
  54 }
  55
  56 void TrueRenderControl::drawGradientBackground(
  57      Surface &sf, const RenderTexture &texture) const
  58 {
  59   unsigned int r,g,b;
  60   int w = sf.size().width(), h = sf.size().height();
  61   int off, x;
  62
  63   const ScreenInfo *info = display->screenInfo(_screen);
  64   XImage *im = XCreateImage(**display, info->visual(), info->depth(),
  65                             ZPixmap, 0, NULL, w, h, 32, 0);
  66   im->byte_order = endian;
  67
  68   switch (texture.gradient()) {
  69   case RenderTexture::Vertical:
  70     verticalGradient(sf, texture);
  71     break;
  72   case RenderTexture::Diagonal:
  73     diagonalGradient(sf, texture);
  74     break;
  75   case RenderTexture::CrossDiagonal:
  76     crossDiagonalGradient(sf, texture);
  77     break;
  78   default:
  79     printf("unhandled gradient\n");
  80   }
  81
  82   pixel32 *data = sf.pixelData();
  83   pixel32 current;
  84
  85   if (texture.relief() == RenderTexture::Flat && texture.border()) {
  86     r = texture.borderColor().red();
  87     g = texture.borderColor().green();
  88     b = texture.borderColor().blue();
  89     current = (r << default_red_shift)
  90             + (g << default_green_shift)
  91             + (b << default_blue_shift);
  92     for (off = 0, x = 0; x < w; ++x, off++) {
  93       *(data + off) = current;
  94       *(data + off + ((h-1) * w)) = current;
  95     }
  96     for (off = 0, x = 0; x < h; ++x, off++) {
  97       *(data + (off * w)) = current;
  98       *(data + (off * w) + w - 1) = current;
  99     }
 100   }
 101
 102   if (texture.relief() != RenderTexture::Flat) {
 103     if (texture.bevel() == RenderTexture::Bevel1) {
 104       for (off = 1, x = 1; x < w - 1; ++x, off++)
 105         highlight(data + off,
 106                   data + off + (h-1) * w,
 107                   texture.relief()==RenderTexture::Raised);
 108       for (off = 0, x = 0; x < h; ++x, off++)
 109         highlight(data + off * w,
 110                   data + off * w + w - 1,
 111                   texture.relief()==RenderTexture::Raised);
 112     }
 113
 114     if (texture.bevel() == RenderTexture::Bevel2) {
 115       for (off = 2, x = 2; x < w - 2; ++x, off++)
 116         highlight(data + off + w,
 117                   data + off + (h-2) * w,
 118                   texture.relief()==RenderTexture::Raised);
 119       for (off = 1, x = 1; x < h-1; ++x, off++)
 120         highlight(data + off * w + 1,
 121                   data + off * w + w - 2,
 122                   texture.relief()==RenderTexture::Raised);
 123     }
 124   }
 125
 126   reduceDepth(sf, im);
 127
 128   im->data = (char*) data;
 129
 130   sf.setPixmap(im);
 131
 132   im->data = NULL;
 133   XDestroyImage(im);
 134 }
 135
 136 void TrueRenderControl::verticalGradient(Surface &sf,
 137                                          const RenderTexture &texture) const
 138 {
 139   pixel32 *data = sf.pixelData();
 140   pixel32 current;
 141   float dr, dg, db;
 142   unsigned int r,g,b;
 143   int w = sf.size().width(), h = sf.size().height();
 144
 145   dr = (float)(texture.secondary_color().red() - texture.color().red());
 146   dr/= (float)h;
 147
 148   dg = (float)(texture.secondary_color().green() - texture.color().green());
 149   dg/= (float)h;
 150
 151   db = (float)(texture.secondary_color().blue() - texture.color().blue());
 152   db/= (float)h;
 153
 154   for (int y = 0; y < h; ++y) {
 155     r = texture.color().red() + (int)(dr * y);
 156     g = texture.color().green() + (int)(dg * y);
 157     b = texture.color().blue() + (int)(db * y);
 158     current = (r << default_red_shift)
 159             + (g << default_green_shift)
 160             + (b << default_blue_shift);
 161     for (int x = 0; x < w; ++x, ++data)
 162       *data = current;
 163   }
 164 }
 165
 166 void TrueRenderControl::diagonalGradient(Surface &sf,
 167                                          const RenderTexture &texture) const
 168 {
 169   pixel32 *data = sf.pixelData();
 170   pixel32 current;
 171   float drx, dgx, dbx, dry, dgy, dby;
 172   unsigned int r,g,b;
 173   int w = sf.size().width(), h = sf.size().height();
 174
 175   for (int y = 0; y < h; ++y) {
 176     drx = (float)(texture.secondary_color().red() - texture.color().red());
 177     dry = drx/(float)h;
 178     drx/= (float)w;
 179
 180     dgx = (float)(texture.secondary_color().green() - texture.color().green());
 181     dgy = dgx/(float)h;
 182     dgx/= (float)w;
 183
 184     dbx = (float)(texture.secondary_color().blue() - texture.color().blue());
 185     dby = dbx/(float)h;
 186     dbx/= (float)w;
 187     for (int x = 0; x < w; ++x, ++data) {
 188       r = texture.color().red() + ((int)(drx * x) + (int)(dry * y))/2;
 189       g = texture.color().green() + ((int)(dgx * x) + (int)(dgy * y))/2;
 190       b = texture.color().blue() + ((int)(dbx * x) + (int)(dby * y))/2;
 191       current = (r << default_red_shift)
 192               + (g << default_green_shift)
 193               + (b << default_blue_shift);
 194       *data = current;
 195     }
 196   }
 197 }
 198
 199 void TrueRenderControl::crossDiagonalGradient(
 200   Surface &sf, const RenderTexture &texture) const
 201 {
 202   pixel32 *data = sf.pixelData();
 203   pixel32 current;
 204   float drx, dgx, dbx, dry, dgy, dby;
 205   unsigned int r,g,b;
 206   int w = sf.size().width(), h = sf.size().height();
 207
 208   for (int y = 0; y < h; ++y) {
 209     drx = (float)(texture.secondary_color().red() - texture.color().red());
 210     dry = drx/(float)h;
 211     drx/= (float)w;
 212
 213     dgx = (float)(texture.secondary_color().green() - texture.color().green());
 214     dgy = dgx/(float)h;
 215     dgx/= (float)w;
 216
 217     dbx = (float)(texture.secondary_color().blue() - texture.color().blue());
 218     dby = dbx/(float)h;
 219     dbx/= (float)w;
 220     for (int x = w; x > 0; --x, ++data) {
 221       r = texture.color().red() + ((int)(drx * (x-1)) + (int)(dry * y))/2;
 222       g = texture.color().green() + ((int)(dgx * (x-1)) + (int)(dgy * y))/2;
 223       b = texture.color().blue() + ((int)(dbx * (x-1)) + (int)(dby * y))/2;
 224       current = (r << default_red_shift)
 225               + (g << default_green_shift)
 226               + (b << default_blue_shift);
 227       *data = current;
 228     }
 229   }
 230 }
 231
 232 void TrueRenderControl::reduceDepth(Surface &sf, XImage *im) const
 233 {
 234 // since pixel32 is the largest possible pixel size, we can share the array
 235   int r, g, b;
 236   int x,y;
 237   pixel32 *data = sf.pixelData();
 238   pixel16 *p = (pixel16*) data;
 239   switch (im->bits_per_pixel) {
 240   case 32:
 241     if ((_red_offset != default_red_shift) ||
 242         (_blue_offset != default_blue_shift) ||
 243         (_green_offset != default_green_shift)) {
 244       printf("cross endian conversion\n");
 245       for (y = 0; y < im->height; y++) {
 246         for (x = 0; x < im->width; x++) {
 247           r = (data[x] >> default_red_shift) & 0xFF;
 248           g = (data[x] >> default_green_shift) & 0xFF;
 249           b = (data[x] >> default_blue_shift) & 0xFF;
 250           data[x] = (r << _red_offset) + (g << _green_offset) +
 251             (b << _blue_offset);
 252         }
 253         data += im->width;
 254       }
 255    }
 256    return;
 257   case 16:
 258     for (y = 0; y < im->height; y++) {
 259       for (x = 0; x < im->width; x++) {
 260         r = (data[x] >> default_red_shift) & 0xFF;
 261         r = r >> _red_shift;
 262         g = (data[x] >> default_green_shift) & 0xFF;
 263         g = g >> _green_shift;
 264         b = (data[x] >> default_blue_shift) & 0xFF;
 265         b = b >> _blue_shift;
 266         p[x] = (r << _red_offset) + (g << _green_offset) + (b << _blue_offset);
 267       }
 268       data += im->width;
 269       p += im->bytes_per_line/2;
 270     }
 271     break;
 272   default:
 273     printf("your bit depth is currently unhandled\n");
 274   }
 275 }
 276
 277 void TrueRenderControl::highlight(pixel32 *x, pixel32 *y, bool raised) const
 278 {
 279   int r, g, b;
 280
 281   pixel32 *up, *down;
 282   if (raised) {
 283     up = x;
 284     down = y;
 285   } else {
 286     up = y;
 287     down = x;
 288   }
 289   r = (*up >> default_red_shift) & 0xFF;
 290   r += r >> 1;
 291   g = (*up >> default_green_shift) & 0xFF;
 292   g += g >> 1;
 293   b = (*up >> default_blue_shift) & 0xFF;
 294   b += b >> 1;
 295   if (r > 255) r = 255;
 296   if (g > 255) g = 255;
 297   if (b > 255) b = 255;
 298   *up = (r << default_red_shift) + (g << default_green_shift)
 299       + (b << default_blue_shift);
 300
 301   r = (*down >> default_red_shift) & 0xFF;
 302   r = (r >> 1) + (r >> 2);
 303   g = (*down >> default_green_shift) & 0xFF;
 304   g = (g >> 1) + (g >> 2);
 305   b = (*down >> default_blue_shift) & 0xFF;
 306   b = (b >> 1) + (b >> 2);
 307   *down = (r << default_red_shift) + (g << default_green_shift)
 308         + (b << default_blue_shift);
 309 }
 310
 311 void TrueRenderControl::drawBackground(Surface& sf,
 312                                        const RenderTexture &texture) const
 313 {
 314   assert(_screen == sf._screen);
 315   assert(_screen == texture.color().screen());
 316
 317   if (texture.gradient() == RenderTexture::Solid)
 318     drawSolidBackground(sf, texture);
 319   else
 320     drawGradientBackground(sf, texture);
 321 }
 322
 323 }