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, sw, sh, partial_w, partial_h, force_transfer = 0;
  44     RrPixel32 *source, *dest;
  45     Pixmap oldp = None;
  46     RrRect tarea; /* area in which to draw textures */
  47     gboolean resized;
  48
  49     if (w <= 0 || h <= 0) return None;
  50
  51     if (a->surface.parentx < 0 || a->surface.parenty < 0) {
  52         /* ob_debug("Invalid parent co-ordinates\n"); */
  53         return None;
  54     }
  55
  56     if (a->surface.grad == RR_SURFACE_PARENTREL &&
  57         (a->surface.parentx >= a->surface.parent->w ||
  58          a->surface.parenty >= a->surface.parent->h))
  59     {
  60         return None;
  61     }
  62
  63     resized = (a->w != w || a->h != h);
  64
  65     oldp = a->pixmap; /* save to free after changing the visible pixmap */
  66     a->pixmap = XCreatePixmap(RrDisplay(a->inst),
  67                               RrRootWindow(a->inst),
  68                               w, h, RrDepth(a->inst));
  69
  70     g_assert(a->pixmap != None);
  71     a->w = w;
  72     a->h = h;
  73
  74     if (a->xftdraw != NULL)
  75         XftDrawDestroy(a->xftdraw);
  76     a->xftdraw = XftDrawCreate(RrDisplay(a->inst), a->pixmap,
  77                                RrVisual(a->inst), RrColormap(a->inst));
  78     g_assert(a->xftdraw != NULL);
  79
  80     if (resized) {
  81         g_free(a->surface.pixel_data);
  82         a->surface.pixel_data = g_new(RrPixel32, w * h);
  83     }
  84
  85     if (a->surface.grad == RR_SURFACE_PARENTREL) {
  86         g_assert (a->surface.parent);
  87         g_assert (a->surface.parent->w);
  88
  89         sw = a->surface.parent->w;
  90         sh = a->surface.parent->h;
  91
  92         source = (a->surface.parent->surface.pixel_data +
  93                   a->surface.parentx + sw * a->surface.parenty);
  94         dest = a->surface.pixel_data;
  95
  96         if (a->surface.parentx + w > sw) {
  97             partial_w = sw - a->surface.parentx;
  98         } else partial_w = w;
  99
 100         if (a->surface.parenty + h > sh) {
 101             partial_h = sh - a->surface.parenty;
 102         } else partial_h = h;
 103
 104         for (i = 0; i < partial_h; i++, source += sw, dest += w) {
 105             memcpy(dest, source, partial_w * sizeof(RrPixel32));
 106         }
 107     } else
 108         RrRender(a, w, h);
 109
 110     {
 111         gint l, t, r, b;
 112         RrMargins(a, &l, &t, &r, &b);
 113         RECT_SET(tarea, l, t, w - l - r, h - t - b);
 114     }
 115
 116     for (i = 0; i < a->textures; i++) {
 117         switch (a->texture[i].type) {
 118         case RR_TEXTURE_NONE:
 119             break;
 120         case RR_TEXTURE_TEXT:
 121             if (!transferred) {
 122                 transferred = 1;
 123                 if ((a->surface.grad != RR_SURFACE_SOLID)
 124                     || (a->surface.interlaced))
 125                     pixel_data_to_pixmap(a, 0, 0, w, h);
 126             }
 127             if (a->xftdraw == NULL) {
 128                 a->xftdraw = XftDrawCreate(RrDisplay(a->inst), a->pixmap,
 129                                            RrVisual(a->inst),
 130                                            RrColormap(a->inst));
 131             }
 132             RrFontDraw(a->xftdraw, &a->texture[i].data.text, &tarea);
 133             break;
 134         case RR_TEXTURE_LINE_ART:
 135             if (!transferred) {
 136                 transferred = 1;
 137                 if ((a->surface.grad != RR_SURFACE_SOLID)
 138                     || (a->surface.interlaced))
 139                     pixel_data_to_pixmap(a, 0, 0, w, h);
 140             }
 141             XDrawLine(RrDisplay(a->inst), a->pixmap,
 142                       RrColorGC(a->texture[i].data.lineart.color),
 143                       a->texture[i].data.lineart.x1,
 144                       a->texture[i].data.lineart.y1,
 145                       a->texture[i].data.lineart.x2,
 146                       a->texture[i].data.lineart.y2);
 147             break;
 148         case RR_TEXTURE_MASK:
 149             if (!transferred) {
 150                 transferred = 1;
 151                 if ((a->surface.grad != RR_SURFACE_SOLID)
 152                     || (a->surface.interlaced))
 153                     pixel_data_to_pixmap(a, 0, 0, w, h);
 154             }
 155             RrPixmapMaskDraw(a->pixmap, &a->texture[i].data.mask, &tarea);
 156             break;
 157         case RR_TEXTURE_RGBA:
 158             g_assert(!transferred);
 159             RrImageDraw(a->surface.pixel_data,
 160                         &a->texture[i].data.rgba,
 161                         a->w, a->h,
 162                         &tarea);
 163             force_transfer = 1;
 164         break;
 165         }
 166     }
 167
 168     if (!transferred) {
 169         transferred = 1;
 170         if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced) ||
 171             force_transfer)
 172         {
 173             pixel_data_to_pixmap(a, 0, 0, w, h);
 174         }
 175     }
 176
 177     return oldp;
 178 }
 179
 180 void RrPaint(RrAppearance *a, Window win, gint w, gint h)
 181 {
 182     Pixmap oldp;
 183
 184     oldp = RrPaintPixmap(a, w, h);
 185     XSetWindowBackgroundPixmap(RrDisplay(a->inst), win, a->pixmap);
 186     XClearWindow(RrDisplay(a->inst), win);
 187     /* free this after changing the visible pixmap */
 188     if (oldp) XFreePixmap(RrDisplay(a->inst), oldp);
 189 }
 190
 191 RrAppearance *RrAppearanceNew(const RrInstance *inst, gint numtex)
 192 {
 193   RrAppearance *out;
 194
 195   out = g_new0(RrAppearance, 1);
 196   out->inst = inst;
 197   out->textures = numtex;
 198   if (numtex) out->texture = g_new0(RrTexture, numtex);
 199
 200   return out;
 201 }
 202
 203 void RrAppearanceAddTextures(RrAppearance *a, gint numtex)
 204 {
 205     g_assert(a->textures == 0);
 206
 207     a->textures = numtex;
 208     if (numtex) a->texture = g_new0(RrTexture, numtex);
 209 }
 210
 211 RrAppearance *RrAppearanceCopy(RrAppearance *orig)
 212 {
 213     RrSurface *spo, *spc;
 214     RrAppearance *copy = g_new(RrAppearance, 1);
 215     gint i;
 216
 217     copy->inst = orig->inst;
 218
 219     spo = &(orig->surface);
 220     spc = &(copy->surface);
 221     spc->grad = spo->grad;
 222     spc->relief = spo->relief;
 223     spc->bevel = spo->bevel;
 224     if (spo->primary != NULL)
 225         spc->primary = RrColorNew(copy->inst,
 226                                   spo->primary->r,
 227                                   spo->primary->g,
 228                                   spo->primary->b);
 229     else spc->primary = NULL;
 230
 231     if (spo->secondary != NULL)
 232         spc->secondary = RrColorNew(copy->inst,
 233                                     spo->secondary->r,
 234                                     spo->secondary->g,
 235                                     spo->secondary->b);
 236     else spc->secondary = NULL;
 237
 238     if (spo->border_color != NULL)
 239         spc->border_color = RrColorNew(copy->inst,
 240                                        spo->border_color->r,
 241                                        spo->border_color->g,
 242                                        spo->border_color->b);
 243     else spc->border_color = NULL;
 244
 245     if (spo->interlace_color != NULL)
 246         spc->interlace_color = RrColorNew(copy->inst,
 247                                        spo->interlace_color->r,
 248                                        spo->interlace_color->g,
 249                                        spo->interlace_color->b);
 250     else spc->interlace_color = NULL;
 251
 252     if (spo->bevel_dark != NULL)
 253         spc->bevel_dark = RrColorNew(copy->inst,
 254                                      spo->bevel_dark->r,
 255                                      spo->bevel_dark->g,
 256                                      spo->bevel_dark->b);
 257     else spc->bevel_dark = NULL;
 258
 259     if (spo->bevel_light != NULL)
 260         spc->bevel_light = RrColorNew(copy->inst,
 261                                       spo->bevel_light->r,
 262                                       spo->bevel_light->g,
 263                                       spo->bevel_light->b);
 264     else spc->bevel_light = NULL;
 265
 266     spc->interlaced = spo->interlaced;
 267     spc->border = spo->border;
 268     spc->parent = NULL;
 269     spc->parentx = spc->parenty = 0;
 270     spc->pixel_data = NULL;
 271
 272     copy->textures = orig->textures;
 273     copy->texture = g_memdup(orig->texture,
 274                              orig->textures * sizeof(RrTexture));
 275     for (i = 0; i < copy->textures; ++i)
 276         if (copy->texture[i].type == RR_TEXTURE_RGBA) {
 277             copy->texture[i].data.rgba.cache = NULL;
 278         }
 279     copy->pixmap = None;
 280     copy->xftdraw = NULL;
 281     copy->w = copy->h = 0;
 282     return copy;
 283 }
 284
 285 void RrAppearanceFree(RrAppearance *a)
 286 {
 287     gint i;
 288
 289     if (a) {
 290         RrSurface *p;
 291         if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
 292         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 293         for (i = 0; i < a->textures; ++i)
 294             if (a->texture[i].type == RR_TEXTURE_RGBA) {
 295                 g_free(a->texture[i].data.rgba.cache);
 296                 a->texture[i].data.rgba.cache = NULL;
 297             }
 298         if (a->textures)
 299             g_free(a->texture);
 300         p = &a->surface;
 301         RrColorFree(p->primary);
 302         RrColorFree(p->secondary);
 303         RrColorFree(p->border_color);
 304         RrColorFree(p->interlace_color);
 305         RrColorFree(p->bevel_dark);
 306         RrColorFree(p->bevel_light);
 307         g_free(p->pixel_data);
 308         p->pixel_data = NULL;
 309         g_free(a);
 310     }
 311 }
 312
 313
 314 static void pixel_data_to_pixmap(RrAppearance *l,
 315                                  gint x, gint y, gint w, gint h)
 316 {
 317     RrPixel32 *in, *scratch;
 318     Pixmap out;
 319     XImage *im = NULL;
 320     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
 321                       ZPixmap, 0, NULL, w, h, 32, 0);
 322     g_assert(im != NULL);
 323
 324     in = l->surface.pixel_data;
 325     out = l->pixmap;
 326
 327 /* this malloc is a complete waste of time on normal 32bpp
 328    as reduce_depth just sets im->data = data and returns
 329 */
 330     scratch = g_new(RrPixel32, im->width * im->height);
 331     im->data = (gchar*) scratch;
 332     RrReduceDepth(l->inst, in, im);
 333     XPutImage(RrDisplay(l->inst), out,
 334               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
 335               im, 0, 0, x, y, w, h);
 336     im->data = NULL;
 337     XDestroyImage(im);
 338     g_free(scratch);
 339 }
 340
 341 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
 342 {
 343     *l = *t = *r = *b = 0;
 344
 345     if (a->surface.grad != RR_SURFACE_PARENTREL) {
 346         if (a->surface.relief != RR_RELIEF_FLAT) {
 347             switch (a->surface.bevel) {
 348             case RR_BEVEL_1:
 349                 *l = *t = *r = *b = 1;
 350                 break;
 351             case RR_BEVEL_2:
 352                 *l = *t = *r = *b = 2;
 353                 break;
 354             }
 355         } else if (a->surface.border) {
 356             *l = *t = *r = *b = 1;
 357         }
 358     }
 359 }
 360
 361 void RrMinSize(RrAppearance *a, gint *w, gint *h)
 362 {
 363     *w = RrMinWidth(a);
 364     *h = RrMinHeight(a);
 365 }
 366
 367 gint RrMinWidth(RrAppearance *a)
 368 {
 369     gint i;
 370     RrSize *m;
 371     gint l, t, r, b;
 372     gint w = 0;
 373
 374     for (i = 0; i < a->textures; ++i) {
 375         switch (a->texture[i].type) {
 376         case RR_TEXTURE_NONE:
 377             break;
 378         case RR_TEXTURE_MASK:
 379             w = MAX(w, a->texture[i].data.mask.mask->width);
 380             break;
 381         case RR_TEXTURE_TEXT:
 382             m = RrFontMeasureString(a->texture[i].data.text.font,
 383                                     a->texture[i].data.text.string,
 384                                     a->texture[i].data.text.shadow_offset_x,
 385                                     a->texture[i].data.text.shadow_offset_y);
 386             w = MAX(w, m->width);
 387             g_free(m);
 388             break;
 389         case RR_TEXTURE_RGBA:
 390             w += MAX(w, a->texture[i].data.rgba.width);
 391             break;
 392         case RR_TEXTURE_LINE_ART:
 393             w += MAX(w, MAX(a->texture[i].data.lineart.x1,
 394                             a->texture[i].data.lineart.x2));
 395             break;
 396         }
 397     }
 398
 399     RrMargins(a, &l, &t, &r, &b);
 400
 401     w += l + r;
 402
 403     if (w < 1) w = 1;
 404     return w;
 405 }
 406
 407 gint RrMinHeight(RrAppearance *a)
 408 {
 409     gint i;
 410     gint l, t, r, b;
 411     gint h = 0;
 412
 413     for (i = 0; i < a->textures; ++i) {
 414         switch (a->texture[i].type) {
 415         case RR_TEXTURE_NONE:
 416             break;
 417         case RR_TEXTURE_MASK:
 418             h = MAX(h, a->texture[i].data.mask.mask->height);
 419             break;
 420         case RR_TEXTURE_TEXT:
 421             h += MAX(h, RrFontHeight(a->texture[i].data.text.font,
 422                                      a->texture[i].data.text.shadow_offset_y));
 423             break;
 424         case RR_TEXTURE_RGBA:
 425             h += MAX(h, a->texture[i].data.rgba.height);
 426             break;
 427         case RR_TEXTURE_LINE_ART:
 428             h += MAX(h, MAX(a->texture[i].data.lineart.y1,
 429                             a->texture[i].data.lineart.y2));
 430             break;
 431         }
 432     }
 433
 434     RrMargins(a, &l, &t, &r, &b);
 435
 436     h += t + b;
 437
 438     if (h < 1) h = 1;
 439     return h;
 440 }
 441
 442 static void reverse_bits(gchar *c, gint n)
 443 {
 444     gint i;
 445     for (i = 0; i < n; i++, c++)
 446         *c = (((*c * 0x0802UL & 0x22110UL) |
 447                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
 448 }
 449
 450 gboolean RrPixmapToRGBA(const RrInstance *inst,
 451                         Pixmap pmap, Pixmap mask,
 452                         gint *w, gint *h, RrPixel32 **data)
 453 {
 454     Window xr;
 455     gint xx, xy;
 456     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
 457     XImage *xi, *xm = NULL;
 458
 459     if (!XGetGeometry(RrDisplay(inst), pmap,
 460                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
 461         return FALSE;
 462
 463     if (mask) {
 464         if (!XGetGeometry(RrDisplay(inst), mask,
 465                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
 466             return FALSE;
 467         if (pw != mw || ph != mh || xd != 1)
 468             return FALSE;
 469     }
 470
 471     xi = XGetImage(RrDisplay(inst), pmap,
 472                    0, 0, pw, ph, 0xffffffff, ZPixmap);
 473     if (!xi)
 474         return FALSE;
 475
 476     if (mask) {
 477         xm = XGetImage(RrDisplay(inst), mask,
 478                        0, 0, mw, mh, 0xffffffff, ZPixmap);
 479         if (!xm) {
 480             XDestroyImage(xi);
 481             return FALSE;
 482         }
 483         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
 484             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
 485     }
 486
 487     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
 488         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
 489
 490     *data = g_new(RrPixel32, pw * ph);
 491     RrIncreaseDepth(inst, *data, xi);
 492
 493     if (mask) {
 494         /* apply transparency from the mask */
 495         di = 0;
 496         for (i = 0, y = 0; y < ph; ++y) {
 497             for (x = 0; x < pw; ++x, ++i) {
 498                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
 499                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
 500             }
 501             di += xm->bytes_per_line;
 502         }
 503     }
 504
 505     *w = pw;
 506     *h = ph;
 507
 508     XDestroyImage(xi);
 509     if (mask)
 510         XDestroyImage(xm);
 511
 512     return TRUE;
 513 }