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