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 #include "rendertexture.hh"
  12
  13 extern "C" {
  14 #ifdef    HAVE_STDLIB_H
  15 #  include <stdlib.h>
  16 #endif // HAVE_STDLIB_H
  17
  18 #include "../src/gettext.h"
  19 #define _(str) gettext(str)
  20 }
  21
  22 namespace otk {
  23
  24 TrueRenderControl::TrueRenderControl(int screen)
  25   : RenderControl(screen),
  26     _red_offset(0),
  27     _green_offset(0),
  28     _blue_offset(0)
  29 {
  30   printf("Initializing TrueColor RenderControl\n");
  31
  32   Visual *visual = display->screenInfo(_screen)->visual();
  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 = visual->red_mask;
  37   green_mask = visual->green_mask;
  38   blue_mask = visual->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 }
  49
  50 TrueRenderControl::~TrueRenderControl()
  51 {
  52   printf("Destroying TrueColor RenderControl\n");
  53
  54
  55 }
  56
  57
  58 static inline void renderPixel(XImage *im, unsigned char *dp,
  59                                unsigned long pixel)
  60 {
  61   unsigned int bpp = im->bits_per_pixel + (im->byte_order == MSBFirst ? 1 : 0);
  62
  63   switch (bpp) {
  64   case  8: //  8bpp
  65     *dp++ = pixel;
  66     break;
  67   case 16: // 16bpp LSB
  68     *dp++ = pixel;
  69     *dp++ = pixel >> 8;
  70     break;
  71   case 17: // 16bpp MSB
  72     *dp++ = pixel >> 8;
  73     *dp++ = pixel;
  74     break;
  75   case 24: // 24bpp LSB
  76     *dp++ = pixel;
  77     *dp++ = pixel >> 8;
  78     *dp++ = pixel >> 16;
  79     break;
  80   case 25: // 24bpp MSB
  81     *dp++ = pixel >> 16;
  82     *dp++ = pixel >> 8;
  83     *dp++ = pixel;
  84     break;
  85   case 32: // 32bpp LSB
  86     *dp++ = pixel;
  87     *dp++ = pixel >> 8;
  88     *dp++ = pixel >> 16;
  89     *dp++ = pixel >> 24;
  90     break;
  91   case 33: // 32bpp MSB
  92     *dp++ = pixel >> 24;
  93     *dp++ = pixel >> 16;
  94     *dp++ = pixel >> 8;
  95     *dp++ = pixel;
  96     break;
  97   default:
  98     assert(false); // wtf?
  99   }
 100 }
 101
 102 void TrueRenderControl::drawGradientBackground(
 103      Surface &sf, const RenderTexture &texture) const
 104 {
 105   unsigned int r,g,b;
 106   int w = sf.width(), h = sf.height(), off, x;
 107
 108   const ScreenInfo *info = display->screenInfo(_screen);
 109   XImage *im = XCreateImage(**display, info->visual(), info->depth(),
 110                             ZPixmap, 0, NULL, w, h, 32, 0);
 111
 112   pixel32 *data = new pixel32[sf.height()*sf.width()];
 113   pixel32 current;
 114
 115   switch (texture.gradient()) {
 116   case RenderTexture::Vertical:
 117     verticalGradient(sf, texture, data);
 118     break;
 119   case RenderTexture::Diagonal:
 120     diagonalGradient(sf, texture, data);
 121     break;
 122   case RenderTexture::CrossDiagonal:
 123     crossDiagonalGradient(sf, texture, data);
 124     break;
 125   default:
 126     printf("unhandled gradient\n");
 127   }
 128
 129   if (texture.relief() == RenderTexture::Flat && texture.border()) {
 130     r = texture.borderColor().red();
 131     g = texture.borderColor().green();
 132     b = texture.borderColor().blue();
 133     current = (r << default_red_shift)
 134             + (g << default_green_shift)
 135             + (b << default_blue_shift);
 136     for (off = 0, x = 0; x < w; ++x, off++) {
 137       *(data + off) = current;
 138       *(data + off + ((h-1) * w)) = current;
 139     }
 140     for (off = 0, x = 0; x < h; ++x, off++) {
 141       *(data + (off * w)) = current;
 142       *(data + (off * w) + w - 1) = current;
 143     }
 144   }
 145
 146   if (texture.relief() != RenderTexture::Flat) {
 147     if (texture.bevel() == RenderTexture::Bevel1) {
 148       for (off = 1, x = 1; x < w - 1; ++x, off++)
 149         highlight(data + off,
 150                   data + off + (h-1) * w,
 151                   texture.relief()==RenderTexture::Raised);
 152       for (off = 0, x = 0; x < h; ++x, off++)
 153         highlight(data + off * w,
 154                   data + off * w + w - 1,
 155                   texture.relief()==RenderTexture::Raised);
 156     }
 157
 158     if (texture.bevel() == RenderTexture::Bevel2) {
 159       for (off = 2, x = 2; x < w - 2; ++x, off++)
 160         highlight(data + off + w,
 161                   data + off + (h-2) * w,
 162                   texture.relief()==RenderTexture::Raised);
 163       for (off = 1, x = 1; x < h-1; ++x, off++)
 164         highlight(data + off * w + 1,
 165                   data + off * w + w - 2,
 166                   texture.relief()==RenderTexture::Raised);
 167     }
 168   }
 169
 170   reduceDepth(im, data);
 171
 172   im->data = (char*) data;
 173
 174   sf.setPixmap(im);
 175
 176   delete [] im->data;
 177   im->data = NULL;
 178   XDestroyImage(im);
 179 }
 180
 181 void TrueRenderControl::verticalGradient(Surface &sf,
 182                                          const RenderTexture &texture,
 183                                          pixel32 *data) const
 184 {
 185   pixel32 current;
 186   float dr, dg, db;
 187   unsigned int r,g,b;
 188
 189   dr = (float)(texture.secondary_color().red() - texture.color().red());
 190   dr/= (float)sf.height();
 191
 192   dg = (float)(texture.secondary_color().green() - texture.color().green());
 193   dg/= (float)sf.height();
 194
 195   db = (float)(texture.secondary_color().blue() - texture.color().blue());
 196   db/= (float)sf.height();
 197
 198   for (int y = 0; y < sf.height(); ++y) {
 199     r = texture.color().red() + (int)(dr * y);
 200     g = texture.color().green() + (int)(dg * y);
 201     b = texture.color().blue() + (int)(db * y);
 202     current = (r << default_red_shift)
 203             + (g << default_green_shift)
 204             + (b << default_blue_shift);
 205     for (int x = 0; x < sf.width(); ++x, ++data)
 206       *data = current;
 207   }
 208 }
 209
 210 void TrueRenderControl::diagonalGradient(Surface &sf,
 211                                          const RenderTexture &texture,
 212                                          pixel32 *data) const
 213 {
 214   pixel32 current;
 215   float drx, dgx, dbx, dry, dgy, dby;
 216   unsigned int r,g,b;
 217
 218
 219   for (int y = 0; y < sf.height(); ++y) {
 220     drx = (float)(texture.secondary_color().red() - texture.color().red());
 221     dry = drx/(float)sf.height();
 222     drx/= (float)sf.width();
 223
 224     dgx = (float)(texture.secondary_color().green() - texture.color().green());
 225     dgy = dgx/(float)sf.height();
 226     dgx/= (float)sf.width();
 227
 228     dbx = (float)(texture.secondary_color().blue() - texture.color().blue());
 229     dby = dbx/(float)sf.height();
 230     dbx/= (float)sf.width();
 231     for (int x = 0; x < sf.width(); ++x, ++data) {
 232       r = texture.color().red() + ((int)(drx * x) + (int)(dry * y))/2;
 233       g = texture.color().green() + ((int)(dgx * x) + (int)(dgy * y))/2;
 234       b = texture.color().blue() + ((int)(dbx * x) + (int)(dby * y))/2;
 235       current = (r << default_red_shift)
 236               + (g << default_green_shift)
 237               + (b << default_blue_shift);
 238       *data = current;
 239     }
 240   }
 241 }
 242
 243 void TrueRenderControl::crossDiagonalGradient(Surface &sf,
 244                                          const RenderTexture &texture,
 245                                          pixel32 *data) const
 246 {
 247   pixel32 current;
 248   float drx, dgx, dbx, dry, dgy, dby;
 249   unsigned int r,g,b;
 250
 251   for (int y = 0; y < sf.height(); ++y) {
 252     drx = (float)(texture.secondary_color().red() - texture.color().red());
 253     dry = drx/(float)sf.height();
 254     drx/= (float)sf.width();
 255
 256     dgx = (float)(texture.secondary_color().green() - texture.color().green());
 257     dgy = dgx/(float)sf.height();
 258     dgx/= (float)sf.width();
 259
 260     dbx = (float)(texture.secondary_color().blue() - texture.color().blue());
 261     dby = dbx/(float)sf.height();
 262     dbx/= (float)sf.width();
 263     for (int x = sf.width(); x > 0; --x, ++data) {
 264       r = texture.color().red() + ((int)(drx * (x-1)) + (int)(dry * y))/2;
 265       g = texture.color().green() + ((int)(dgx * (x-1)) + (int)(dgy * y))/2;
 266       b = texture.color().blue() + ((int)(dbx * (x-1)) + (int)(dby * y))/2;
 267       current = (r << default_red_shift)
 268               + (g << default_green_shift)
 269               + (b << default_blue_shift);
 270       *data = current;
 271     }
 272   }
 273 }
 274 void TrueRenderControl::reduceDepth(XImage *im, pixel32 *data) const
 275 {
 276 // since pixel32 is the largest possible pixel size, we can share the array
 277   int r, g, b;
 278   int x,y;
 279   pixel16 *p = (pixel16 *)data;
 280   switch (im->bits_per_pixel) {
 281   case 32:
 282     return;
 283   case 16:
 284     for (y = 0; y < im->height; y++) {
 285       for (x = 0; x < im->width; x++) {
 286         r = (data[x] >> default_red_shift) & 0xFF;
 287         r = r >> _red_shift;
 288         g = (data[x] >> default_green_shift) & 0xFF;
 289         g = g >> _green_shift;
 290         b = (data[x] >> default_blue_shift) & 0xFF;
 291         b = b >> _blue_shift;
 292         p[x] = (r << _red_offset) + (g << _green_offset) + (b << _blue_offset);
 293       }
 294       data += im->width;
 295       p += im->bytes_per_line/2;
 296     }
 297     break;
 298   default:
 299     printf("your bit depth is currently unhandled\n");
 300   }
 301 }
 302
 303 void TrueRenderControl::highlight(pixel32 *x, pixel32 *y, bool raised) const
 304 {
 305   int r, g, b;
 306
 307   pixel32 *up, *down;
 308   if (raised) {
 309     up = x;
 310     down = y;
 311   } else {
 312     up = y;
 313     down = x;
 314   }
 315   r = (*up >> default_red_shift) & 0xFF;
 316   r += r >> 1;
 317   g = (*up >> default_green_shift) & 0xFF;
 318   g += g >> 1;
 319   b = (*up >> default_blue_shift) & 0xFF;
 320   b += b >> 1;
 321   if (r > 255) r = 255;
 322   if (g > 255) g = 255;
 323   if (b > 255) b = 255;
 324   *up = (r << default_red_shift) + (g << default_green_shift)
 325       + (b << default_blue_shift);
 326
 327   r = (*down >> default_red_shift) & 0xFF;
 328   r = (r >> 1) + (r >> 2);
 329   g = (*down >> default_green_shift) & 0xFF;
 330   g = (g >> 1) + (g >> 2);
 331   b = (*down >> default_blue_shift) & 0xFF;
 332   b = (b >> 1) + (b >> 2);
 333   *down = (r << default_red_shift) + (g << default_green_shift)
 334         + (b << default_blue_shift);
 335 }
 336 void TrueRenderControl::drawBackground(Surface& sf,
 337                                        const RenderTexture &texture) const
 338 {
 339   assert(_screen == sf._screen);
 340   assert(_screen == texture.color().screen());
 341
 342   if (texture.gradient() == RenderTexture::Solid) {
 343     drawSolidBackground(sf, texture);
 344   } else {
 345     drawGradientBackground(sf, texture);
 346   }
 347 }
 348
 349 }