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

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