render/render.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    render.c for the Openbox window manager
   4    Copyright (c) 2006        Mikael Magnusson
   5    Copyright (c) 2003-2007   Dana Jansens
   6    Copyright (c) 2003        Derek Foreman
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    See the COPYING file for a copy of the GNU General Public License.
  19 */
  20
  21 #include "render.h"
  22 #include "gradient.h"
  23 #include "font.h"
  24 #include "mask.h"
  25 #include "color.h"
  26 #include "image.h"
  27 #include "theme.h"
  28
  29 #include <glib.h>
  30 #include <X11/Xlib.h>
  31 #include <X11/Xutil.h>
  32 #include <X11/Xft/Xft.h>
  33
  34 #ifdef HAVE_STDLIB_H
  35 #  include <stdlib.h>
  36 #endif
  37
  38 static void pixel_data_to_pixmap(RrAppearance *l,
  39                                  gint x, gint y, gint w, gint h);
  40
  41 Pixmap RrPaintPixmap(RrAppearance *a, gint w, gint h)
  42 {
  43     gint i, transferred = 0, force_transfer = 0;
  44     Pixmap oldp = None;
  45     RrRect tarea; /* area in which to draw textures */
  46     gboolean resized;
  47
  48     if (w <= 0 || h <= 0) return None;
  49
  50     if (a->surface.parentx < 0 || a->surface.parenty < 0) {
  51         /* ob_debug("Invalid parent co-ordinates\n"); */
  52         return None;
  53     }
  54
  55     if (a->surface.grad == RR_SURFACE_PARENTREL &&
  56         (a->surface.parentx >= a->surface.parent->w ||
  57          a->surface.parenty >= a->surface.parent->h))
  58     {
  59         return None;
  60     }
  61
  62     resized = (a->w != w || a->h != h);
  63
  64     oldp = a->pixmap; /* save to free after changing the visible pixmap */
  65     a->pixmap = XCreatePixmap(RrDisplay(a->inst),
  66                               RrRootWindow(a->inst),
  67                               w, h, RrDepth(a->inst));
  68
  69     g_assert(a->pixmap != None);
  70     a->w = w;
  71     a->h = h;
  72
  73     if (a->xftdraw != NULL)
  74         XftDrawDestroy(a->xftdraw);
  75     a->xftdraw = XftDrawCreate(RrDisplay(a->inst), a->pixmap,
  76                                RrVisual(a->inst), RrColormap(a->inst));
  77     g_assert(a->xftdraw != NULL);
  78
  79     if (resized) {
  80         g_free(a->surface.pixel_data);
  81         a->surface.pixel_data = g_new(RrPixel32, w * h);
  82     }
  83
  84     RrRender(a, w, h);
  85
  86     {
  87         gint l, t, r, b;
  88         RrMargins(a, &l, &t, &r, &b);
  89         RECT_SET(tarea, l, t, w - l - r, h - t - b);
  90     }
  91
  92     for (i = 0; i < a->textures; i++) {
  93         switch (a->texture[i].type) {
  94         case RR_TEXTURE_NONE:
  95             break;
  96         case RR_TEXTURE_TEXT:
  97             if (!transferred) {
  98                 transferred = 1;
  99                 if ((a->surface.grad != RR_SURFACE_SOLID)
 100                     || (a->surface.interlaced))
 101                     pixel_data_to_pixmap(a, 0, 0, w, h);
 102             }
 103             if (a->xftdraw == NULL) {
 104                 a->xftdraw = XftDrawCreate(RrDisplay(a->inst), a->pixmap,
 105                                            RrVisual(a->inst),
 106                                            RrColormap(a->inst));
 107             }
 108             RrFontDraw(a->xftdraw, &a->texture[i].data.text, &tarea);
 109             break;
 110         case RR_TEXTURE_LINE_ART:
 111             if (!transferred) {
 112                 transferred = 1;
 113                 if ((a->surface.grad != RR_SURFACE_SOLID)
 114                     || (a->surface.interlaced))
 115                     pixel_data_to_pixmap(a, 0, 0, w, h);
 116             }
 117             XDrawLine(RrDisplay(a->inst), a->pixmap,
 118                       RrColorGC(a->texture[i].data.lineart.color),
 119                       a->texture[i].data.lineart.x1,
 120                       a->texture[i].data.lineart.y1,
 121                       a->texture[i].data.lineart.x2,
 122                       a->texture[i].data.lineart.y2);
 123             break;
 124         case RR_TEXTURE_MASK:
 125             if (!transferred) {
 126                 transferred = 1;
 127                 if ((a->surface.grad != RR_SURFACE_SOLID)
 128                     || (a->surface.interlaced))
 129                     pixel_data_to_pixmap(a, 0, 0, w, h);
 130             }
 131             RrPixmapMaskDraw(a->pixmap, &a->texture[i].data.mask, &tarea);
 132             break;
 133         case RR_TEXTURE_RGBA:
 134             g_assert(!transferred);
 135             RrImageDraw(a->surface.pixel_data,
 136                         &a->texture[i].data.rgba,
 137                         a->w, a->h,
 138                         &tarea);
 139             force_transfer = 1;
 140         break;
 141         }
 142     }
 143
 144     if (!transferred) {
 145         transferred = 1;
 146         if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced) ||
 147             force_transfer)
 148         {
 149             pixel_data_to_pixmap(a, 0, 0, w, h);
 150         }
 151     }
 152
 153     return oldp;
 154 }
 155
 156 void RrPaint(RrAppearance *a, Window win, gint w, gint h)
 157 {
 158     Pixmap oldp;
 159
 160     oldp = RrPaintPixmap(a, w, h);
 161     XSetWindowBackgroundPixmap(RrDisplay(a->inst), win, a->pixmap);
 162     XClearWindow(RrDisplay(a->inst), win);
 163     /* free this after changing the visible pixmap */
 164     if (oldp) XFreePixmap(RrDisplay(a->inst), oldp);
 165 }
 166
 167 RrAppearance *RrAppearanceNew(const RrInstance *inst, gint numtex)
 168 {
 169   RrAppearance *out;
 170
 171   out = g_new0(RrAppearance, 1);
 172   out->inst = inst;
 173   out->textures = numtex;
 174   if (numtex) out->texture = g_new0(RrTexture, numtex);
 175
 176   return out;
 177 }
 178
 179 void RrAppearanceAddTextures(RrAppearance *a, gint numtex)
 180 {
 181     g_assert(a->textures == 0);
 182
 183     a->textures = numtex;
 184     if (numtex) a->texture = g_new0(RrTexture, numtex);
 185 }
 186
 187 RrAppearance *RrAppearanceCopy(RrAppearance *orig)
 188 {
 189     RrSurface *spo, *spc;
 190     RrAppearance *copy = g_new(RrAppearance, 1);
 191     gint i;
 192
 193     copy->inst = orig->inst;
 194
 195     spo = &(orig->surface);
 196     spc = &(copy->surface);
 197     spc->grad = spo->grad;
 198     spc->relief = spo->relief;
 199     spc->bevel = spo->bevel;
 200     if (spo->primary != NULL)
 201         spc->primary = RrColorNew(copy->inst,
 202                                   spo->primary->r,
 203                                   spo->primary->g,
 204                                   spo->primary->b);
 205     else spc->primary = NULL;
 206
 207     if (spo->secondary != NULL)
 208         spc->secondary = RrColorNew(copy->inst,
 209                                     spo->secondary->r,
 210                                     spo->secondary->g,
 211                                     spo->secondary->b);
 212     else spc->secondary = NULL;
 213
 214     if (spo->border_color != NULL)
 215         spc->border_color = RrColorNew(copy->inst,
 216                                        spo->border_color->r,
 217                                        spo->border_color->g,
 218                                        spo->border_color->b);
 219     else spc->border_color = NULL;
 220
 221     if (spo->interlace_color != NULL)
 222         spc->interlace_color = RrColorNew(copy->inst,
 223                                        spo->interlace_color->r,
 224                                        spo->interlace_color->g,
 225                                        spo->interlace_color->b);
 226     else spc->interlace_color = NULL;
 227
 228     if (spo->bevel_dark != NULL)
 229         spc->bevel_dark = RrColorNew(copy->inst,
 230                                      spo->bevel_dark->r,
 231                                      spo->bevel_dark->g,
 232                                      spo->bevel_dark->b);
 233     else spc->bevel_dark = NULL;
 234
 235     if (spo->bevel_light != NULL)
 236         spc->bevel_light = RrColorNew(copy->inst,
 237                                       spo->bevel_light->r,
 238                                       spo->bevel_light->g,
 239                                       spo->bevel_light->b);
 240     else spc->bevel_light = NULL;
 241
 242     spc->interlaced = spo->interlaced;
 243     spc->border = spo->border;
 244     spc->parent = NULL;
 245     spc->parentx = spc->parenty = 0;
 246     spc->pixel_data = NULL;
 247
 248     copy->textures = orig->textures;
 249     copy->texture = g_memdup(orig->texture,
 250                              orig->textures * sizeof(RrTexture));
 251     for (i = 0; i < copy->textures; ++i)
 252         if (copy->texture[i].type == RR_TEXTURE_RGBA) {
 253             copy->texture[i].data.rgba.cache = NULL;
 254         }
 255     copy->pixmap = None;
 256     copy->xftdraw = NULL;
 257     copy->w = copy->h = 0;
 258     return copy;
 259 }
 260
 261 void RrAppearanceFree(RrAppearance *a)
 262 {
 263     gint i;
 264
 265     if (a) {
 266         RrSurface *p;
 267         if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
 268         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 269         for (i = 0; i < a->textures; ++i)
 270             if (a->texture[i].type == RR_TEXTURE_RGBA) {
 271                 g_free(a->texture[i].data.rgba.cache);
 272                 a->texture[i].data.rgba.cache = NULL;
 273             }
 274         if (a->textures)
 275             g_free(a->texture);
 276         p = &a->surface;
 277         RrColorFree(p->primary);
 278         RrColorFree(p->secondary);
 279         RrColorFree(p->border_color);
 280         RrColorFree(p->interlace_color);
 281         RrColorFree(p->bevel_dark);
 282         RrColorFree(p->bevel_light);
 283         g_free(p->pixel_data);
 284         p->pixel_data = NULL;
 285         g_free(a);
 286     }
 287 }
 288
 289
 290 static void pixel_data_to_pixmap(RrAppearance *l,
 291                                  gint x, gint y, gint w, gint h)
 292 {
 293     RrPixel32 *in, *scratch;
 294     Pixmap out;
 295     XImage *im = NULL;
 296     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
 297                       ZPixmap, 0, NULL, w, h, 32, 0);
 298     g_assert(im != NULL);
 299
 300     in = l->surface.pixel_data;
 301     out = l->pixmap;
 302
 303 /* this malloc is a complete waste of time on normal 32bpp
 304    as reduce_depth just sets im->data = data and returns
 305 */
 306     scratch = g_new(RrPixel32, im->width * im->height);
 307     im->data = (gchar*) scratch;
 308     RrReduceDepth(l->inst, in, im);
 309     XPutImage(RrDisplay(l->inst), out,
 310               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
 311               im, 0, 0, x, y, w, h);
 312     im->data = NULL;
 313     XDestroyImage(im);
 314     g_free(scratch);
 315 }
 316
 317 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
 318 {
 319     *l = *t = *r = *b = 0;
 320
 321     if (a->surface.grad != RR_SURFACE_PARENTREL) {
 322         if (a->surface.relief != RR_RELIEF_FLAT) {
 323             switch (a->surface.bevel) {
 324             case RR_BEVEL_1:
 325                 *l = *t = *r = *b = 1;
 326                 break;
 327             case RR_BEVEL_2:
 328                 *l = *t = *r = *b = 2;
 329                 break;
 330             }
 331         } else if (a->surface.border) {
 332             *l = *t = *r = *b = 1;
 333         }
 334     }
 335 }
 336
 337 void RrMinSize(RrAppearance *a, gint *w, gint *h)
 338 {
 339     *w = RrMinWidth(a);
 340     *h = RrMinHeight(a);
 341 }
 342
 343 gint RrMinWidth(RrAppearance *a)
 344 {
 345     gint i;
 346     RrSize *m;
 347     gint l, t, r, b;
 348     gint w = 0;
 349
 350     for (i = 0; i < a->textures; ++i) {
 351         switch (a->texture[i].type) {
 352         case RR_TEXTURE_NONE:
 353             break;
 354         case RR_TEXTURE_MASK:
 355             w = MAX(w, a->texture[i].data.mask.mask->width);
 356             break;
 357         case RR_TEXTURE_TEXT:
 358             m = RrFontMeasureString(a->texture[i].data.text.font,
 359                                     a->texture[i].data.text.string,
 360                                     a->texture[i].data.text.shadow_offset_x,
 361                                     a->texture[i].data.text.shadow_offset_y);
 362             w = MAX(w, m->width);
 363             g_free(m);
 364             break;
 365         case RR_TEXTURE_RGBA:
 366             w += MAX(w, a->texture[i].data.rgba.width);
 367             break;
 368         case RR_TEXTURE_LINE_ART:
 369             w += MAX(w, MAX(a->texture[i].data.lineart.x1,
 370                             a->texture[i].data.lineart.x2));
 371             break;
 372         }
 373     }
 374
 375     RrMargins(a, &l, &t, &r, &b);
 376
 377     w += l + r;
 378
 379     if (w < 1) w = 1;
 380     return w;
 381 }
 382
 383 gint RrMinHeight(RrAppearance *a)
 384 {
 385     gint i;
 386     gint l, t, r, b;
 387     gint h = 0;
 388
 389     for (i = 0; i < a->textures; ++i) {
 390         switch (a->texture[i].type) {
 391         case RR_TEXTURE_NONE:
 392             break;
 393         case RR_TEXTURE_MASK:
 394             h = MAX(h, a->texture[i].data.mask.mask->height);
 395             break;
 396         case RR_TEXTURE_TEXT:
 397             h += MAX(h, RrFontHeight(a->texture[i].data.text.font,
 398                                      a->texture[i].data.text.shadow_offset_y));
 399             break;
 400         case RR_TEXTURE_RGBA:
 401             h += MAX(h, a->texture[i].data.rgba.height);
 402             break;
 403         case RR_TEXTURE_LINE_ART:
 404             h += MAX(h, MAX(a->texture[i].data.lineart.y1,
 405                             a->texture[i].data.lineart.y2));
 406             break;
 407         }
 408     }
 409
 410     RrMargins(a, &l, &t, &r, &b);
 411
 412     h += t + b;
 413
 414     if (h < 1) h = 1;
 415     return h;
 416 }
 417
 418 static void reverse_bits(gchar *c, gint n)
 419 {
 420     gint i;
 421     for (i = 0; i < n; i++, c++)
 422         *c = (((*c * 0x0802UL & 0x22110UL) |
 423                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
 424 }
 425
 426 gboolean RrPixmapToRGBA(const RrInstance *inst,
 427                         Pixmap pmap, Pixmap mask,
 428                         gint *w, gint *h, RrPixel32 **data)
 429 {
 430     Window xr;
 431     gint xx, xy;
 432     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
 433     XImage *xi, *xm = NULL;
 434
 435     if (!XGetGeometry(RrDisplay(inst), pmap,
 436                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
 437         return FALSE;
 438
 439     if (mask) {
 440         if (!XGetGeometry(RrDisplay(inst), mask,
 441                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
 442             return FALSE;
 443         if (pw != mw || ph != mh || xd != 1)
 444             return FALSE;
 445     }
 446
 447     xi = XGetImage(RrDisplay(inst), pmap,
 448                    0, 0, pw, ph, 0xffffffff, ZPixmap);
 449     if (!xi)
 450         return FALSE;
 451
 452     if (mask) {
 453         xm = XGetImage(RrDisplay(inst), mask,
 454                        0, 0, mw, mh, 0xffffffff, ZPixmap);
 455         if (!xm) {
 456             XDestroyImage(xi);
 457             return FALSE;
 458         }
 459         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
 460             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
 461     }
 462
 463     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
 464         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
 465
 466     *data = g_new(RrPixel32, pw * ph);
 467     RrIncreaseDepth(inst, *data, xi);
 468
 469     if (mask) {
 470         /* apply transparency from the mask */
 471         di = 0;
 472         for (i = 0, y = 0; y < ph; ++y) {
 473             for (x = 0; x < pw; ++x, ++i) {
 474                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
 475                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
 476             }
 477             di += xm->bytes_per_line;
 478         }
 479     }
 480
 481     *w = pw;
 482     *h = ph;
 483
 484     XDestroyImage(xi);
 485     if (mask)
 486         XDestroyImage(xm);
 487
 488     return TRUE;
 489 }