Dogcows Code - chaz/openbox/blob - render/gradient.c

   1 #include <glib.h>
   2 #include "render.h"
   3 #include "gradient.h"
   4 #include "../kernel/openbox.h"
   5 #include "color.h"
   6
   7 void gradient_render(Surface *sf, int w, int h)
   8 {
   9   pixel32 *data = sf->data.planar.pixel_data;
  10   pixel32 current;
  11   unsigned int r,g,b;
  12   int off, x;
  13
  14   switch (sf->data.planar.grad) {
  15   case Background_Solid: /* already handled */
  16     return;
  17   case Background_Vertical:
  18     gradient_vertical(sf, w, h);
  19     break;
  20   case Background_Horizontal:
  21     gradient_horizontal(sf, w, h);
  22     break;
  23   case Background_Diagonal:
  24     gradient_diagonal(sf, w, h);
  25     break;
  26   case Background_CrossDiagonal:
  27     gradient_crossdiagonal(sf, w, h);
  28     break;
  29   case Background_Pyramid:
  30     gradient_pyramid(sf, w, h);
  31     break;
  32   default:
  33     g_message("unhandled gradient");
  34     return;
  35   }
  36
  37   if (sf->data.planar.relief == Flat && sf->data.planar.border) {
  38     r = sf->data.planar.border_color->r;
  39     g = sf->data.planar.border_color->g;
  40     b = sf->data.planar.border_color->b;
  41     current = (r << default_red_shift)
  42             + (g << default_green_shift)
  43             + (b << default_blue_shift);
  44     for (off = 0, x = 0; x < w; ++x, off++) {
  45       *(data + off) = current;
  46       *(data + off + ((h-1) * w)) = current;
  47     }
  48     for (off = 0, x = 0; x < h; ++x, off++) {
  49       *(data + (off * w)) = current;
  50       *(data + (off * w) + w - 1) = current;
  51     }
  52   }
  53
  54   if (sf->data.planar.relief != Flat) {
  55     if (sf->data.planar.bevel == Bevel1) {
  56       for (off = 1, x = 1; x < w - 1; ++x, off++)
  57         highlight(data + off,
  58                   data + off + (h-1) * w,
  59                   sf->data.planar.relief==Raised);
  60       for (off = 0, x = 0; x < h; ++x, off++)
  61         highlight(data + off * w,
  62                   data + off * w + w - 1,
  63                   sf->data.planar.relief==Raised);
  64     }
  65
  66     if (sf->data.planar.bevel == Bevel2) {
  67       for (off = 2, x = 2; x < w - 2; ++x, off++)
  68         highlight(data + off + w,
  69                   data + off + (h-2) * w,
  70                   sf->data.planar.relief==Raised);
  71       for (off = 1, x = 1; x < h-1; ++x, off++)
  72         highlight(data + off * w + 1,
  73                   data + off * w + w - 2,
  74                   sf->data.planar.relief==Raised);
  75     }
  76   }
  77 }
  78
  79
  80
  81 void gradient_vertical(Surface *sf, int w, int h)
  82 {
  83   pixel32 *data = sf->data.planar.pixel_data;
  84   pixel32 current;
  85   float dr, dg, db;
  86   unsigned int r,g,b;
  87   int x, y;
  88
  89   dr = (float)(sf->data.planar.secondary->r - sf->data.planar.primary->r);
  90   dr/= (float)h;
  91
  92   dg = (float)(sf->data.planar.secondary->g - sf->data.planar.primary->g);
  93   dg/= (float)h;
  94
  95   db = (float)(sf->data.planar.secondary->b - sf->data.planar.primary->b);
  96   db/= (float)h;
  97
  98   for (y = 0; y < h; ++y) {
  99     r = sf->data.planar.primary->r + (int)(dr * y);
 100     g = sf->data.planar.primary->g + (int)(dg * y);
 101     b = sf->data.planar.primary->b + (int)(db * y);
 102     current = (r << default_red_shift)
 103             + (g << default_green_shift)
 104             + (b << default_blue_shift);
 105     for (x = 0; x < w; ++x, ++data)
 106       *data = current;
 107   }
 108 }
 109
 110 void gradient_horizontal(Surface *sf, int w, int h)
 111 {
 112   pixel32 *data = sf->data.planar.pixel_data;
 113   pixel32 current;
 114   float dr, dg, db;
 115   unsigned int r,g,b;
 116   int x, y;
 117
 118   dr = (float)(sf->data.planar.secondary->r - sf->data.planar.primary->r);
 119   dr/= (float)w;
 120
 121   dg = (float)(sf->data.planar.secondary->g - sf->data.planar.primary->g);
 122   dg/= (float)w;
 123
 124   db = (float)(sf->data.planar.secondary->b - sf->data.planar.primary->b);
 125   db/= (float)w;
 126
 127   for (x = 0; x < w; ++x, ++data) {
 128     r = sf->data.planar.primary->r + (int)(dr * x);
 129     g = sf->data.planar.primary->g + (int)(dg * x);
 130     b = sf->data.planar.primary->b + (int)(db * x);
 131     current = (r << default_red_shift)
 132             + (g << default_green_shift)
 133             + (b << default_blue_shift);
 134     for (y = 0; y < h; ++y)
 135       *(data + y*w) = current;
 136   }
 137 }
 138
 139 void gradient_diagonal(Surface *sf, int w, int h)
 140 {
 141   pixel32 *data = sf->data.planar.pixel_data;
 142   pixel32 current;
 143   float drx, dgx, dbx, dry, dgy, dby;
 144   unsigned int r,g,b;
 145   int x, y;
 146
 147   for (y = 0; y < h; ++y) {
 148     drx = (float)(sf->data.planar.secondary->r - sf->data.planar.primary->r);
 149     dry = drx/(float)h;
 150     drx/= (float)w;
 151
 152     dgx = (float)(sf->data.planar.secondary->g - sf->data.planar.primary->g);
 153     dgy = dgx/(float)h;
 154     dgx/= (float)w;
 155
 156     dbx = (float)(sf->data.planar.secondary->b - sf->data.planar.primary->b);
 157     dby = dbx/(float)h;
 158     dbx/= (float)w;
 159     for (x = 0; x < w; ++x, ++data) {
 160       r = sf->data.planar.primary->r + ((int)(drx * x) + (int)(dry * y))/2;
 161       g = sf->data.planar.primary->g + ((int)(dgx * x) + (int)(dgy * y))/2;
 162       b = sf->data.planar.primary->b + ((int)(dbx * x) + (int)(dby * y))/2;
 163       current = (r << default_red_shift)
 164               + (g << default_green_shift)
 165               + (b << default_blue_shift);
 166       *data = current;
 167     }
 168   }
 169 }
 170
 171 void gradient_crossdiagonal(Surface *sf, int w, int h)
 172 {
 173   pixel32 *data = sf->data.planar.pixel_data;
 174   pixel32 current;
 175   float drx, dgx, dbx, dry, dgy, dby;
 176   unsigned int r,g,b;
 177   int x, y;
 178
 179   for (y = 0; y < h; ++y) {
 180     drx = (float)(sf->data.planar.secondary->r - sf->data.planar.primary->r);
 181     dry = drx/(float)h;
 182     drx/= (float)w;
 183
 184     dgx = (float)(sf->data.planar.secondary->g - sf->data.planar.primary->g);
 185     dgy = dgx/(float)h;
 186     dgx/= (float)w;
 187
 188     dbx = (float)(sf->data.planar.secondary->b - sf->data.planar.primary->b);
 189     dby = dbx/(float)h;
 190     dbx/= (float)w;
 191     for (x = w; x > 0; --x, ++data) {
 192       r = sf->data.planar.primary->r + ((int)(drx * (x-1)) + (int)(dry * y))/2;
 193       g = sf->data.planar.primary->g + ((int)(dgx * (x-1)) + (int)(dgy * y))/2;
 194       b = sf->data.planar.primary->b + ((int)(dbx * (x-1)) + (int)(dby * y))/2;
 195       current = (r << default_red_shift)
 196               + (g << default_green_shift)
 197               + (b << default_blue_shift);
 198       *data = current;
 199     }
 200   }
 201 }
 202
 203 void highlight(pixel32 *x, pixel32 *y, gboolean raised)
 204 {
 205   int r, g, b;
 206
 207   pixel32 *up, *down;
 208   if (raised) {
 209     up = x;
 210     down = y;
 211   } else {
 212     up = y;
 213     down = x;
 214   }
 215   r = (*up >> default_red_shift) & 0xFF;
 216   r += r >> 1;
 217   g = (*up >> default_green_shift) & 0xFF;
 218   g += g >> 1;
 219   b = (*up >> default_blue_shift) & 0xFF;
 220   b += b >> 1;
 221   if (r > 255) r = 255;
 222   if (g > 255) g = 255;
 223   if (b > 255) b = 255;
 224   *up = (r << default_red_shift) + (g << default_green_shift)
 225       + (b << default_blue_shift);
 226
 227   r = (*down >> default_red_shift) & 0xFF;
 228   r = (r >> 1) + (r >> 2);
 229   g = (*down >> default_green_shift) & 0xFF;
 230   g = (g >> 1) + (g >> 2);
 231   b = (*down >> default_blue_shift) & 0xFF;
 232   b = (b >> 1) + (b >> 2);
 233   *down = (r << default_red_shift) + (g << default_green_shift)
 234         + (b << default_blue_shift);
 235 }
 236
 237 void gradient_solid(Appearance *l, int x, int y, int w, int h)
 238 {
 239   pixel32 pix;
 240   int i, a, b;
 241   PlanarSurface *sp = &l->surface.data.planar;
 242   int left = x, top = y, right = w - 1, bottom = h - 1;
 243
 244   if (sp->primary->gc == None)
 245     color_allocate_gc(sp->primary);
 246   pix = (sp->primary->r << default_red_shift)
 247       + (sp->primary->g << default_green_shift)
 248       + (sp->primary->b << default_blue_shift);
 249
 250   for (a = 0; a < l->area.width; a++)
 251     for (b = 0; b < l->area.height; b++)
 252       sp->pixel_data[a + b*l->area.width] = pix;
 253
 254   XFillRectangle(ob_display, l->pixmap, sp->primary->gc
 255                  , x, y, w, h);
 256
 257   if (l->surface.data.planar.interlaced) {
 258     if (sp->secondary->gc == None)
 259       color_allocate_gc(sp->secondary);
 260     for (i = y; i < h; i += 2)
 261       XDrawLine(ob_display, l->pixmap, sp->secondary->gc,
 262                 x, i, w, i);
 263   }
 264 /*
 265   switch (texture.relief()) {
 266   case RenderTexture::Raised:
 267     switch (texture.bevel()) {
 268     case RenderTexture::Bevel1:
 269       XDrawLine(ob_display, l->pixmap, texture.bevelDarkColor().gc(),
 270                 left, bottom, right, bottom);
 271       XDrawLine(ob_display, l->pixmap, texture.bevelDarkColor().gc(),
 272                 right, bottom, right, top);
 273
 274       XDrawLine(ob_display, l->pixmap, texture.bevelLightColor().gc(),
 275                 left, top, right, top);
 276       XDrawLine(ob_display, l->pixmap, texture.bevelLightColor().gc(),
 277                 left, bottom, left, top);
 278       break;
 279     case RenderTexture::Bevel2:
 280       XDrawLine(ob_display, l->pixmap, texture.bevelDarkColor().gc(),
 281                 left + 1, bottom - 2, right - 2, bottom - 2);
 282       XDrawLine(ob_display, l->pixmap, texture.bevelDarkColor().gc(),
 283                 right - 2, bottom - 2, right - 2, top + 1);
 284
 285       XDrawLine(ob_display, l->pixmap, texture.bevelLightColor().gc(),
 286                 left + 1, top + 1, right - 2, top + 1);
 287       XDrawLine(**display, sf.pixmap(), texture.bevelLightColor().gc(),
 288                 left + 1, bottom - 2, left + 1, top + 1);
 289       break;
 290     default:
 291       assert(false); // unhandled RenderTexture::BevelType
 292     }
 293     break;
 294   case RenderTexture::Sunken:
 295     switch (texture.bevel()) {
 296     case RenderTexture::Bevel1:
 297       XDrawLine(**display, sf.pixmap(), texture.bevelLightColor().gc(),
 298                 left, bottom, right, bottom);
 299       XDrawLine(**display, sf.pixmap(), texture.bevelLightColor().gc(),
 300                 right, bottom, right, top);
 301
 302       XDrawLine(**display, sf.pixmap(), texture.bevelDarkColor().gc(),
 303                 left, top, right, top);
 304       XDrawLine(**display, sf.pixmap(), texture.bevelDarkColor().gc(),
 305                 left, bottom, left, top);
 306       break;
 307     case RenderTexture::Bevel2:
 308       XDrawLine(**display, sf.pixmap(), texture.bevelLightColor().gc(),
 309                 left + 1, bottom - 2, right - 2, bottom - 2);
 310       XDrawLine(**display, sf.pixmap(), texture.bevelLightColor().gc(),
 311                 right - 2, bottom - 2, right - 2, top + 1);
 312
 313       XDrawLine(**display, sf.pixmap(), texture.bevelDarkColor().gc(),
 314                 left + 1, top + 1, right - 2, top + 1);
 315       XDrawLine(**display, sf.pixmap(), texture.bevelDarkColor().gc(),
 316                 left + 1, bottom - 2, left + 1, top + 1);
 317
 318       break;
 319     default:
 320       assert(false); // unhandled RenderTexture::BevelType
 321     }
 322     break;
 323   case RenderTexture::Flat:
 324     if (texture.border())
 325       XDrawRectangle(**display, sf.pixmap(), texture.borderColor().gc(),
 326                      left, top, right, bottom);
 327     break;
 328   default:
 329     assert(false); // unhandled RenderTexture::ReliefType
 330   }
 331 */
 332 }
 333
 334 void gradient_pyramid(Surface *sf, int inw, int inh)
 335 {
 336   pixel32 *data = sf->data.planar.pixel_data;
 337   pixel32 *end = data + inw*inh;
 338   pixel32 current;
 339   float drx, dgx, dbx, dry, dgy, dby;
 340   unsigned int r,g,b;
 341   int x, y, h=(inh+1)/2, w=(inw+1)/2;
 342 memset(data, 0, inw*inh*sizeof(pixel32));
 343   for (y = 0; y < h; ++y) {
 344     drx = (float)(sf->data.planar.secondary->r - sf->data.planar.primary->r);
 345     dry = drx/(float)h;
 346     drx/= (float)w;
 347
 348     dgx = (float)(sf->data.planar.secondary->g - sf->data.planar.primary->g);
 349     dgy = dgx/(float)h;
 350     dgx/= (float)w;
 351
 352     dbx = (float)(sf->data.planar.secondary->b - sf->data.planar.primary->b);
 353     dby = dbx/(float)h;
 354     dbx/= (float)w;
 355     for (x = 0; x < w; ++x, data) {
 356       r = sf->data.planar.primary->r + ((int)(drx * x) + (int)(dry * y))/2;
 357       g = sf->data.planar.primary->g + ((int)(dgx * x) + (int)(dgy * y))/2;
 358       b = sf->data.planar.primary->b + ((int)(dbx * x) + (int)(dby * y))/2;
 359       current = (r << default_red_shift)
 360               + (g << default_green_shift)
 361               + (b << default_blue_shift);
 362       *(data+x) = current;
 363       *(data+inw-x) = current;
 364       *(end-x) = current;
 365       *(end-(inw-x)) = current;
 366     }
 367     data+=inw;
 368     end-=inw;
 369   }
 370 }
 371