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   out->surface.bevel_light_adjust = 128;
 175   out->surface.bevel_dark_adjust = 64;
 176   if (numtex) out->texture = g_new0(RrTexture, numtex);
 177
 178   return out;
 179 }
 180
 181 void RrAppearanceAddTextures(RrAppearance *a, gint numtex)
 182 {
 183     g_assert(a->textures == 0);
 184
 185     a->textures = numtex;
 186     if (numtex) a->texture = g_new0(RrTexture, numtex);
 187 }
 188
 189 RrAppearance *RrAppearanceCopy(RrAppearance *orig)
 190 {
 191     RrSurface *spo, *spc;
 192     RrAppearance *copy = g_new(RrAppearance, 1);
 193     gint i;
 194
 195     copy->inst = orig->inst;
 196
 197     spo = &(orig->surface);
 198     spc = &(copy->surface);
 199     spc->grad = spo->grad;
 200     spc->relief = spo->relief;
 201     spc->bevel = spo->bevel;
 202     if (spo->primary != NULL)
 203         spc->primary = RrColorNew(copy->inst,
 204                                   spo->primary->r,
 205                                   spo->primary->g,
 206                                   spo->primary->b);
 207     else spc->primary = NULL;
 208
 209     if (spo->secondary != NULL)
 210         spc->secondary = RrColorNew(copy->inst,
 211                                     spo->secondary->r,
 212                                     spo->secondary->g,
 213                                     spo->secondary->b);
 214     else spc->secondary = NULL;
 215
 216     if (spo->border_color != NULL)
 217         spc->border_color = RrColorNew(copy->inst,
 218                                        spo->border_color->r,
 219                                        spo->border_color->g,
 220                                        spo->border_color->b);
 221     else spc->border_color = NULL;
 222
 223     if (spo->interlace_color != NULL)
 224         spc->interlace_color = RrColorNew(copy->inst,
 225                                        spo->interlace_color->r,
 226                                        spo->interlace_color->g,
 227                                        spo->interlace_color->b);
 228     else spc->interlace_color = NULL;
 229
 230     if (spo->bevel_dark != NULL)
 231         spc->bevel_dark = RrColorNew(copy->inst,
 232                                      spo->bevel_dark->r,
 233                                      spo->bevel_dark->g,
 234                                      spo->bevel_dark->b);
 235     else spc->bevel_dark = NULL;
 236
 237     if (spo->bevel_light != NULL)
 238         spc->bevel_light = RrColorNew(copy->inst,
 239                                       spo->bevel_light->r,
 240                                       spo->bevel_light->g,
 241                                       spo->bevel_light->b);
 242     else spc->bevel_light = NULL;
 243
 244     spc->interlaced = spo->interlaced;
 245     spc->bevel_light_adjust = spo->bevel_light_adjust;
 246     spc->bevel_dark_adjust = spo->bevel_dark_adjust;
 247     spc->border = spo->border;
 248     spc->parent = NULL;
 249     spc->parentx = spc->parenty = 0;
 250     spc->pixel_data = NULL;
 251
 252     copy->textures = orig->textures;
 253     copy->texture = g_memdup(orig->texture,
 254                              orig->textures * sizeof(RrTexture));
 255     for (i = 0; i < copy->textures; ++i)
 256         if (copy->texture[i].type == RR_TEXTURE_RGBA) {
 257             copy->texture[i].data.rgba.cache = NULL;
 258         }
 259     copy->pixmap = None;
 260     copy->xftdraw = NULL;
 261     copy->w = copy->h = 0;
 262     return copy;
 263 }
 264
 265 void RrAppearanceFree(RrAppearance *a)
 266 {
 267     gint i;
 268
 269     if (a) {
 270         RrSurface *p;
 271         if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
 272         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 273         for (i = 0; i < a->textures; ++i)
 274             if (a->texture[i].type == RR_TEXTURE_RGBA) {
 275                 g_free(a->texture[i].data.rgba.cache);
 276                 a->texture[i].data.rgba.cache = NULL;
 277             }
 278         if (a->textures)
 279             g_free(a->texture);
 280         p = &a->surface;
 281         RrColorFree(p->primary);
 282         RrColorFree(p->secondary);
 283         RrColorFree(p->border_color);
 284         RrColorFree(p->interlace_color);
 285         RrColorFree(p->bevel_dark);
 286         RrColorFree(p->bevel_light);
 287         g_free(p->pixel_data);
 288         p->pixel_data = NULL;
 289         g_free(a);
 290     }
 291 }
 292
 293
 294 static void pixel_data_to_pixmap(RrAppearance *l,
 295                                  gint x, gint y, gint w, gint h)
 296 {
 297     RrPixel32 *in, *scratch;
 298     Pixmap out;
 299     XImage *im = NULL;
 300     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
 301                       ZPixmap, 0, NULL, w, h, 32, 0);
 302     g_assert(im != NULL);
 303
 304     in = l->surface.pixel_data;
 305     out = l->pixmap;
 306
 307 /* this malloc is a complete waste of time on normal 32bpp
 308    as reduce_depth just sets im->data = data and returns
 309 */
 310     scratch = g_new(RrPixel32, im->width * im->height);
 311     im->data = (gchar*) scratch;
 312     RrReduceDepth(l->inst, in, im);
 313     XPutImage(RrDisplay(l->inst), out,
 314               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
 315               im, 0, 0, x, y, w, h);
 316     im->data = NULL;
 317     XDestroyImage(im);
 318     g_free(scratch);
 319 }
 320
 321 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
 322 {
 323     *l = *t = *r = *b = 0;
 324
 325     if (a->surface.grad != RR_SURFACE_PARENTREL) {
 326         if (a->surface.relief != RR_RELIEF_FLAT) {
 327             switch (a->surface.bevel) {
 328             case RR_BEVEL_1:
 329                 *l = *t = *r = *b = 1;
 330                 break;
 331             case RR_BEVEL_2:
 332                 *l = *t = *r = *b = 2;
 333                 break;
 334             }
 335         } else if (a->surface.border) {
 336             *l = *t = *r = *b = 1;
 337         }
 338     }
 339 }
 340
 341 void RrMinSize(RrAppearance *a, gint *w, gint *h)
 342 {
 343     *w = RrMinWidth(a);
 344     *h = RrMinHeight(a);
 345 }
 346
 347 gint RrMinWidth(RrAppearance *a)
 348 {
 349     gint i;
 350     RrSize *m;
 351     gint l, t, r, b;
 352     gint w = 0;
 353
 354     for (i = 0; i < a->textures; ++i) {
 355         switch (a->texture[i].type) {
 356         case RR_TEXTURE_NONE:
 357             break;
 358         case RR_TEXTURE_MASK:
 359             w = MAX(w, a->texture[i].data.mask.mask->width);
 360             break;
 361         case RR_TEXTURE_TEXT:
 362             m = RrFontMeasureString(a->texture[i].data.text.font,
 363                                     a->texture[i].data.text.string,
 364                                     a->texture[i].data.text.shadow_offset_x,
 365                                     a->texture[i].data.text.shadow_offset_y);
 366             w = MAX(w, m->width);
 367             g_free(m);
 368             break;
 369         case RR_TEXTURE_RGBA:
 370             w += MAX(w, a->texture[i].data.rgba.width);
 371             break;
 372         case RR_TEXTURE_LINE_ART:
 373             w += MAX(w, MAX(a->texture[i].data.lineart.x1,
 374                             a->texture[i].data.lineart.x2));
 375             break;
 376         }
 377     }
 378
 379     RrMargins(a, &l, &t, &r, &b);
 380
 381     w += l + r;
 382
 383     if (w < 1) w = 1;
 384     return w;
 385 }
 386
 387 gint RrMinHeight(RrAppearance *a)
 388 {
 389     gint i;
 390     gint l, t, r, b;
 391     gint h = 0;
 392
 393     for (i = 0; i < a->textures; ++i) {
 394         switch (a->texture[i].type) {
 395         case RR_TEXTURE_NONE:
 396             break;
 397         case RR_TEXTURE_MASK:
 398             h = MAX(h, a->texture[i].data.mask.mask->height);
 399             break;
 400         case RR_TEXTURE_TEXT:
 401             h += MAX(h, RrFontHeight(a->texture[i].data.text.font,
 402                                      a->texture[i].data.text.shadow_offset_y));
 403             break;
 404         case RR_TEXTURE_RGBA:
 405             h += MAX(h, a->texture[i].data.rgba.height);
 406             break;
 407         case RR_TEXTURE_LINE_ART:
 408             h += MAX(h, MAX(a->texture[i].data.lineart.y1,
 409                             a->texture[i].data.lineart.y2));
 410             break;
 411         }
 412     }
 413
 414     RrMargins(a, &l, &t, &r, &b);
 415
 416     h += t + b;
 417
 418     if (h < 1) h = 1;
 419     return h;
 420 }
 421
 422 static void reverse_bits(gchar *c, gint n)
 423 {
 424     gint i;
 425     for (i = 0; i < n; i++, c++)
 426         *c = (((*c * 0x0802UL & 0x22110UL) |
 427                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
 428 }
 429
 430 gboolean RrPixmapToRGBA(const RrInstance *inst,
 431                         Pixmap pmap, Pixmap mask,
 432                         gint *w, gint *h, RrPixel32 **data)
 433 {
 434     Window xr;
 435     gint xx, xy;
 436     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
 437     XImage *xi, *xm = NULL;
 438
 439     if (!XGetGeometry(RrDisplay(inst), pmap,
 440                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
 441         return FALSE;
 442
 443     if (mask) {
 444         if (!XGetGeometry(RrDisplay(inst), mask,
 445                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
 446             return FALSE;
 447         if (pw != mw || ph != mh || xd != 1)
 448             return FALSE;
 449     }
 450
 451     xi = XGetImage(RrDisplay(inst), pmap,
 452                    0, 0, pw, ph, 0xffffffff, ZPixmap);
 453     if (!xi)
 454         return FALSE;
 455
 456     if (mask) {
 457         xm = XGetImage(RrDisplay(inst), mask,
 458                        0, 0, mw, mh, 0xffffffff, ZPixmap);
 459         if (!xm) {
 460             XDestroyImage(xi);
 461             return FALSE;
 462         }
 463         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
 464             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
 465     }
 466
 467     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
 468         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
 469
 470     *data = g_new(RrPixel32, pw * ph);
 471     RrIncreaseDepth(inst, *data, xi);
 472
 473     if (mask) {
 474         /* apply transparency from the mask */
 475         di = 0;
 476         for (i = 0, y = 0; y < ph; ++y) {
 477             for (x = 0; x < pw; ++x, ++i) {
 478                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
 479                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
 480             }
 481             di += xm->bytes_per_line;
 482         }
 483     }
 484
 485     *w = pw;
 486     *h = ph;
 487
 488     XDestroyImage(xi);
 489     if (mask)
 490         XDestroyImage(xm);
 491
 492     return TRUE;
 493 }