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     case Background_PipeCross:
  33         gradient_pipecross(sf, w, h);
  34         break;
  35     case Background_Rectangle:
  36         gradient_rectangle(sf, w, h);
  37         break;
  38     default:
  39         g_message("unhandled gradient");
  40         return;
  41     }
  42
  43     if (sf->data.planar.relief == Flat && sf->data.planar.border) {
  44         r = sf->data.planar.border_color->r;
  45         g = sf->data.planar.border_color->g;
  46         b = sf->data.planar.border_color->b;
  47         current = (r << default_red_offset)
  48             + (g << default_green_offset)
  49             + (b << default_blue_offset);
  50         for (off = 0, x = 0; x < w; ++x, off++) {
  51             *(data + off) = current;
  52             *(data + off + ((h-1) * w)) = current;
  53         }
  54         for (off = 0, x = 0; x < h; ++x, off++) {
  55             *(data + (off * w)) = current;
  56             *(data + (off * w) + w - 1) = current;
  57         }
  58     }
  59
  60     if (sf->data.planar.relief != Flat) {
  61         if (sf->data.planar.bevel == Bevel1) {
  62             for (off = 1, x = 1; x < w - 1; ++x, off++)
  63                 highlight(data + off,
  64                           data + off + (h-1) * w,
  65                           sf->data.planar.relief==Raised);
  66             for (off = 0, x = 0; x < h; ++x, off++)
  67                 highlight(data + off * w,
  68                           data + off * w + w - 1,
  69                           sf->data.planar.relief==Raised);
  70         }
  71
  72         if (sf->data.planar.bevel == Bevel2) {
  73             for (off = 2, x = 2; x < w - 2; ++x, off++)
  74                 highlight(data + off + w,
  75                           data + off + (h-2) * w,
  76                           sf->data.planar.relief==Raised);
  77             for (off = 1, x = 1; x < h-1; ++x, off++)
  78                 highlight(data + off * w + 1,
  79                           data + off * w + w - 2,
  80                           sf->data.planar.relief==Raised);
  81         }
  82     }
  83 }
  84
  85
  86
  87 void gradient_vertical(Surface *sf, int w, int h)
  88 {
  89     pixel32 *data = sf->data.planar.pixel_data;
  90     pixel32 current;
  91     float dr, dg, db;
  92     unsigned int r,g,b;
  93     int x, y;
  94
  95     dr = (float)(sf->data.planar.secondary->r - sf->data.planar.primary->r);
  96     dr/= (float)h;
  97
  98     dg = (float)(sf->data.planar.secondary->g - sf->data.planar.primary->g);
  99     dg/= (float)h;
 100
 101     db = (float)(sf->data.planar.secondary->b - sf->data.planar.primary->b);
 102     db/= (float)h;
 103
 104     for (y = 0; y < h; ++y) {
 105         r = sf->data.planar.primary->r + (int)(dr * y);
 106         g = sf->data.planar.primary->g + (int)(dg * y);
 107         b = sf->data.planar.primary->b + (int)(db * y);
 108         current = (r << default_red_offset)
 109             + (g << default_green_offset)
 110             + (b << default_blue_offset);
 111         for (x = 0; x < w; ++x, ++data)
 112             *data = current;
 113     }
 114 }
 115
 116 void gradient_horizontal(Surface *sf, int w, int h)
 117 {
 118     pixel32 *data = sf->data.planar.pixel_data;
 119     pixel32 current;
 120     float dr, dg, db;
 121     unsigned int r,g,b;
 122     int x, y;
 123
 124     dr = (float)(sf->data.planar.secondary->r - sf->data.planar.primary->r);
 125     dr/= (float)w;
 126
 127     dg = (float)(sf->data.planar.secondary->g - sf->data.planar.primary->g);
 128     dg/= (float)w;
 129
 130     db = (float)(sf->data.planar.secondary->b - sf->data.planar.primary->b);
 131     db/= (float)w;
 132
 133     for (x = 0; x < w; ++x, ++data) {
 134         r = sf->data.planar.primary->r + (int)(dr * x);
 135         g = sf->data.planar.primary->g + (int)(dg * x);
 136         b = sf->data.planar.primary->b + (int)(db * x);
 137         current = (r << default_red_offset)
 138             + (g << default_green_offset)
 139             + (b << default_blue_offset);
 140         for (y = 0; y < h; ++y)
 141             *(data + y*w) = current;
 142     }
 143 }
 144
 145 void gradient_diagonal(Surface *sf, int w, int h)
 146 {
 147     pixel32 *data = sf->data.planar.pixel_data;
 148     pixel32 current;
 149     float drx, dgx, dbx, dry, dgy, dby;
 150     unsigned int r,g,b;
 151     int x, y;
 152
 153     for (y = 0; y < h; ++y) {
 154         drx = (float)(sf->data.planar.secondary->r -
 155                       sf->data.planar.primary->r);
 156         dry = drx/(float)h;
 157         drx/= (float)w;
 158
 159         dgx = (float)(sf->data.planar.secondary->g -
 160                       sf->data.planar.primary->g);
 161         dgy = dgx/(float)h;
 162         dgx/= (float)w;
 163
 164         dbx = (float)(sf->data.planar.secondary->b -
 165                       sf->data.planar.primary->b);
 166         dby = dbx/(float)h;
 167         dbx/= (float)w;
 168         for (x = 0; x < w; ++x, ++data) {
 169             r = sf->data.planar.primary->r +
 170                 ((int)(drx * x) + (int)(dry * y))/2;
 171             g = sf->data.planar.primary->g +
 172                 ((int)(dgx * x) + (int)(dgy * y))/2;
 173             b = sf->data.planar.primary->b +
 174                 ((int)(dbx * x) + (int)(dby * y))/2;
 175             current = (r << default_red_offset)
 176                 + (g << default_green_offset)
 177                 + (b << default_blue_offset);
 178             *data = current;
 179         }
 180     }
 181 }
 182
 183 void gradient_crossdiagonal(Surface *sf, int w, int h)
 184 {
 185     pixel32 *data = sf->data.planar.pixel_data;
 186     pixel32 current;
 187     float drx, dgx, dbx, dry, dgy, dby;
 188     unsigned int r,g,b;
 189     int x, y;
 190
 191     for (y = 0; y < h; ++y) {
 192         drx = (float)(sf->data.planar.secondary->r -
 193                       sf->data.planar.primary->r);
 194         dry = drx/(float)h;
 195         drx/= (float)w;
 196
 197         dgx = (float)(sf->data.planar.secondary->g -
 198                       sf->data.planar.primary->g);
 199         dgy = dgx/(float)h;
 200         dgx/= (float)w;
 201
 202         dbx = (float)(sf->data.planar.secondary->b -
 203                       sf->data.planar.primary->b);
 204         dby = dbx/(float)h;
 205         dbx/= (float)w;
 206         for (x = w; x > 0; --x, ++data) {
 207             r = sf->data.planar.primary->r +
 208                 ((int)(drx * (x-1)) + (int)(dry * y))/2;
 209             g = sf->data.planar.primary->g +
 210                 ((int)(dgx * (x-1)) + (int)(dgy * y))/2;
 211             b = sf->data.planar.primary->b +
 212                 ((int)(dbx * (x-1)) + (int)(dby * y))/2;
 213             current = (r << default_red_offset)
 214                 + (g << default_green_offset)
 215                 + (b << default_blue_offset);
 216             *data = current;
 217         }
 218     }
 219 }
 220
 221 void highlight(pixel32 *x, pixel32 *y, gboolean raised)
 222 {
 223     int r, g, b;
 224
 225     pixel32 *up, *down;
 226     if (raised) {
 227         up = x;
 228         down = y;
 229     } else {
 230         up = y;
 231         down = x;
 232     }
 233     r = (*up >> default_red_offset) & 0xFF;
 234     r += r >> 1;
 235     g = (*up >> default_green_offset) & 0xFF;
 236     g += g >> 1;
 237     b = (*up >> default_blue_offset) & 0xFF;
 238     b += b >> 1;
 239     if (r > 0xFF) r = 0xFF;
 240     if (g > 0xFF) g = 0xFF;
 241     if (b > 0xFF) b = 0xFF;
 242     *up = (r << default_red_offset) + (g << default_green_offset)
 243         + (b << default_blue_offset);
 244
 245     r = (*down >> default_red_offset) & 0xFF;
 246     r = (r >> 1) + (r >> 2);
 247     g = (*down >> default_green_offset) & 0xFF;
 248     g = (g >> 1) + (g >> 2);
 249     b = (*down >> default_blue_offset) & 0xFF;
 250     b = (b >> 1) + (b >> 2);
 251     *down = (r << default_red_offset) + (g << default_green_offset)
 252         + (b << default_blue_offset);
 253 }
 254
 255 static void create_bevel_colors(Appearance *l)
 256 {
 257     int r, g, b;
 258
 259     /* light color */
 260     r = l->surface.data.planar.primary->r;
 261     r += r >> 1;
 262     g = l->surface.data.planar.primary->g;
 263     g += g >> 1;
 264     b = l->surface.data.planar.primary->b;
 265     b += b >> 1;
 266     if (r > 0xFF) r = 0xFF;
 267     if (g > 0xFF) g = 0xFF;
 268     if (b > 0xFF) b = 0xFF;
 269     g_assert(!l->surface.data.planar.bevel_light);
 270     l->surface.data.planar.bevel_light = color_new(r, g, b);
 271     color_allocate_gc(l->surface.data.planar.bevel_light);
 272
 273     /* dark color */
 274     r = l->surface.data.planar.primary->r;
 275     r = (r >> 1) + (r >> 2);
 276     g = l->surface.data.planar.primary->g;
 277     g = (g >> 1) + (g >> 2);
 278     b = l->surface.data.planar.primary->b;
 279     b = (b >> 1) + (b >> 2);
 280     g_assert(!l->surface.data.planar.bevel_dark);
 281     l->surface.data.planar.bevel_dark = color_new(r, g, b);
 282     color_allocate_gc(l->surface.data.planar.bevel_dark);
 283 }
 284
 285 void gradient_solid(Appearance *l, int x, int y, int w, int h)
 286 {
 287     pixel32 pix;
 288     int i, a, b;
 289     PlanarSurface *sp = &l->surface.data.planar;
 290     int left = x, top = y, right = x + w - 1, bottom = y + h - 1;
 291
 292     if (sp->primary->gc == None)
 293         color_allocate_gc(sp->primary);
 294     pix = (sp->primary->r << default_red_offset)
 295         + (sp->primary->g << default_green_offset)
 296         + (sp->primary->b << default_blue_offset);
 297
 298     for (a = 0; a < l->area.width; a++)
 299         for (b = 0; b < l->area.height; b++)
 300             sp->pixel_data[a + b*l->area.width] = pix;
 301
 302     XFillRectangle(ob_display, l->pixmap, sp->primary->gc,
 303                    x, y, w, h);
 304
 305     if (sp->interlaced) {
 306         if (sp->secondary->gc == None)
 307             color_allocate_gc(sp->secondary);
 308         for (i = y; i < h; i += 2)
 309             XDrawLine(ob_display, l->pixmap, sp->secondary->gc,
 310                       x, i, w, i);
 311     }
 312
 313     switch (sp->relief) {
 314     case Raised:
 315         if (!sp->bevel_dark)
 316             create_bevel_colors(l);
 317
 318         switch (sp->bevel) {
 319         case Bevel1:
 320             XDrawLine(ob_display, l->pixmap, sp->bevel_dark->gc,
 321                       left, bottom, right, bottom);
 322             XDrawLine(ob_display, l->pixmap, sp->bevel_dark->gc,
 323                       right, bottom, right, top);
 324
 325             XDrawLine(ob_display, l->pixmap, sp->bevel_light->gc,
 326                       left, top, right, top);
 327             XDrawLine(ob_display, l->pixmap, sp->bevel_light->gc,
 328                       left, bottom, left, top);
 329             break;
 330         case Bevel2:
 331             XDrawLine(ob_display, l->pixmap,
 332                       sp->bevel_dark->gc,
 333                       left + 1, bottom - 2, right - 2, bottom - 2);
 334             XDrawLine(ob_display, l->pixmap,
 335                       sp->bevel_dark->gc,
 336                       right - 2, bottom - 2, right - 2, top + 1);
 337
 338             XDrawLine(ob_display, l->pixmap,
 339                       sp->bevel_light->gc,
 340                       left + 1, top + 1, right - 2, top + 1);
 341             XDrawLine(ob_display, l->pixmap,
 342                       sp->bevel_light->gc,
 343                       left + 1, bottom - 2, left + 1, top + 1);
 344             break;
 345         default:
 346             g_assert_not_reached(); /* unhandled BevelType */
 347         }
 348         break;
 349     case Sunken:
 350         if (!sp->bevel_dark)
 351             create_bevel_colors(l);
 352
 353         switch (sp->bevel) {
 354         case Bevel1:
 355             XDrawLine(ob_display, l->pixmap, sp->bevel_light->gc,
 356                       left, bottom, right, bottom);
 357             XDrawLine(ob_display, l->pixmap, sp->bevel_light->gc,
 358                       right, bottom, right, top);
 359
 360             XDrawLine(ob_display, l->pixmap, sp->bevel_dark->gc,
 361                       left, top, right, top);
 362             XDrawLine(ob_display, l->pixmap, sp->bevel_dark->gc,
 363                       left, bottom, left, top);
 364             break;
 365         case Bevel2:
 366             XDrawLine(ob_display, l->pixmap, sp->bevel_light->gc,
 367                       left + 1, bottom - 2, right - 2, bottom - 2);
 368             XDrawLine(ob_display, l->pixmap, sp->bevel_light->gc,
 369                       right - 2, bottom - 2, right - 2, top + 1);
 370
 371             XDrawLine(ob_display, l->pixmap, sp->bevel_dark->gc,
 372                       left + 1, top + 1, right - 2, top + 1);
 373             XDrawLine(ob_display, l->pixmap, sp->bevel_dark->gc,
 374                       left + 1, bottom - 2, left + 1, top + 1);
 375
 376             break;
 377         default:
 378             g_assert_not_reached(); /* unhandled BevelType */
 379         }
 380         break;
 381     case Flat:
 382         if (sp->border)
 383             XDrawRectangle(ob_display, l->pixmap, sp->border_color->gc,
 384                            left, top, right, bottom);
 385         break;
 386     default:
 387         g_assert_not_reached(); /* unhandled ReliefType */
 388     }
 389 }
 390
 391 void gradient_pyramid(Surface *sf, int inw, int inh)
 392 {
 393     pixel32 *data = sf->data.planar.pixel_data;
 394     pixel32 *end = data + inw*inh - 1;
 395     pixel32 current;
 396     float drx, dgx, dbx, dry, dgy, dby;
 397     unsigned int r,g,b;
 398     int x, y, h=(inh/2) + 1, w=(inw/2) + 1;
 399     for (y = 0; y < h; ++y) {
 400         drx = (float)(sf->data.planar.secondary->r -
 401                       sf->data.planar.primary->r);
 402         dry = drx/(float)h;
 403         drx/= (float)w;
 404
 405         dgx = (float)(sf->data.planar.secondary->g -
 406                       sf->data.planar.primary->g);
 407         dgy = dgx/(float)h;
 408         dgx/= (float)w;
 409
 410         dbx = (float)(sf->data.planar.secondary->b -
 411                       sf->data.planar.primary->b);
 412         dby = dbx/(float)h;
 413         dbx/= (float)w;
 414         for (x = 0; x < w; ++x, data) {
 415             r = sf->data.planar.primary->r +
 416                 ((int)(drx * x) + (int)(dry * y))/2;
 417             g = sf->data.planar.primary->g +
 418                 ((int)(dgx * x) + (int)(dgy * y))/2;
 419             b = sf->data.planar.primary->b +
 420                 ((int)(dbx * x) + (int)(dby * y))/2;
 421             current = (r << default_red_offset)
 422                 + (g << default_green_offset)
 423                 + (b << default_blue_offset);
 424             *(data+x) = current;
 425             *(data+inw-x) = current;
 426             *(end-x) = current;
 427             *(end-(inw-x)) = current;
 428         }
 429         data+=inw;
 430         end-=inw;
 431     }
 432 }
 433
 434 void gradient_rectangle(Surface *sf, int inw, int inh)
 435 {
 436     pixel32 *data = sf->data.planar.pixel_data;
 437     pixel32 *end = data + inw*inh - 1;
 438     pixel32 current;
 439     float drx, dgx, dbx, dry, dgy, dby;
 440     unsigned int r,g,b;
 441     int x, y, h=(inh/2) + 1, w=(inw/2) + 1;
 442     int val;
 443
 444     for (y = 0; y < h; ++y) {
 445         drx = (float)(sf->data.planar.primary->r -
 446                       sf->data.planar.secondary->r);
 447         dry = drx/(float)h;
 448         drx/= (float)w;
 449
 450         dgx = (float)(sf->data.planar.primary->g -
 451                       sf->data.planar.secondary->g);
 452         dgy = dgx/(float)h;
 453         dgx/= (float)w;
 454
 455         dbx = (float)(sf->data.planar.primary->b -
 456                       sf->data.planar.secondary->b);
 457         dby = dbx/(float)h;
 458         dbx/= (float)w;
 459         for (x = 0; x < w; ++x, data) {
 460             if ((float)x/(float)w < (float)y/(float)h) val = (int)(drx * x);
 461             else val = (int)(dry * y);
 462
 463             r = sf->data.planar.secondary->r + val;
 464             g = sf->data.planar.secondary->g + val;
 465             b = sf->data.planar.secondary->b + val;
 466             current = (r << default_red_offset)
 467                 + (g << default_green_offset)
 468                 + (b << default_blue_offset);
 469             *(data+x) = current;
 470             *(data+inw-x) = current;
 471             *(end-x) = current;
 472             *(end-(inw-x)) = current;
 473         }
 474         data+=inw;
 475         end-=inw;
 476     }
 477 }
 478
 479 void gradient_pipecross(Surface *sf, int inw, int inh)
 480 {
 481     pixel32 *data = sf->data.planar.pixel_data;
 482     pixel32 *end = data + inw*inh - 1;
 483     pixel32 current;
 484     float drx, dgx, dbx, dry, dgy, dby;
 485     unsigned int r,g,b;
 486     int x, y, h=(inh/2) + 1, w=(inw/2) + 1;
 487     int val;
 488
 489     for (y = 0; y < h; ++y) {
 490         drx = (float)(sf->data.planar.secondary->r -
 491                       sf->data.planar.primary->r);
 492         dry = drx/(float)h;
 493         drx/= (float)w;
 494
 495         dgx = (float)(sf->data.planar.secondary->g -
 496                       sf->data.planar.primary->g);
 497         dgy = dgx/(float)h;
 498         dgx/= (float)w;
 499
 500         dbx = (float)(sf->data.planar.secondary->b -
 501                       sf->data.planar.primary->b);
 502         dby = dbx/(float)h;
 503         dbx/= (float)w;
 504         for (x = 0; x < w; ++x, data) {
 505             if ((float)x/(float)w > (float)y/(float)h) val = (int)(drx * x);
 506             else val = (int)(dry * y);
 507
 508             r = sf->data.planar.primary->r + val;
 509             g = sf->data.planar.primary->g + val;
 510             b = sf->data.planar.primary->b + val;
 511             current = (r << default_red_offset)
 512                 + (g << default_green_offset)
 513                 + (b << default_blue_offset);
 514             *(data+x) = current;
 515             *(data+inw-x) = current;
 516             *(end-x) = current;
 517             *(end-(inw-x)) = current;
 518         }
 519         data+=inw;
 520         end-=inw;
 521     }
 522 }
 523