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;
  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         break;
 164         }
 165     }
 166
 167     if (!transferred) {
 168         transferred = 1;
 169         if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced))
 170             pixel_data_to_pixmap(a, 0, 0, w, h);
 171     }
 172
 173     return oldp;
 174 }
 175
 176 void RrPaint(RrAppearance *a, Window win, gint w, gint h)
 177 {
 178     Pixmap oldp;
 179
 180     oldp = RrPaintPixmap(a, w, h);
 181     XSetWindowBackgroundPixmap(RrDisplay(a->inst), win, a->pixmap);
 182     XClearWindow(RrDisplay(a->inst), win);
 183     /* free this after changing the visible pixmap */
 184     if (oldp) XFreePixmap(RrDisplay(a->inst), oldp);
 185 }
 186
 187 RrAppearance *RrAppearanceNew(const RrInstance *inst, gint numtex)
 188 {
 189   RrAppearance *out;
 190
 191   out = g_new0(RrAppearance, 1);
 192   out->inst = inst;
 193   out->textures = numtex;
 194   if (numtex) out->texture = g_new0(RrTexture, numtex);
 195
 196   return out;
 197 }
 198
 199 void RrAppearanceAddTextures(RrAppearance *a, gint numtex)
 200 {
 201     g_assert(a->textures == 0);
 202
 203     a->textures = numtex;
 204     if (numtex) a->texture = g_new0(RrTexture, numtex);
 205 }
 206
 207 RrAppearance *RrAppearanceCopy(RrAppearance *orig)
 208 {
 209     RrSurface *spo, *spc;
 210     RrAppearance *copy = g_new(RrAppearance, 1);
 211     gint i;
 212
 213     copy->inst = orig->inst;
 214
 215     spo = &(orig->surface);
 216     spc = &(copy->surface);
 217     spc->grad = spo->grad;
 218     spc->relief = spo->relief;
 219     spc->bevel = spo->bevel;
 220     if (spo->primary != NULL)
 221         spc->primary = RrColorNew(copy->inst,
 222                                   spo->primary->r,
 223                                   spo->primary->g,
 224                                   spo->primary->b);
 225     else spc->primary = NULL;
 226
 227     if (spo->secondary != NULL)
 228         spc->secondary = RrColorNew(copy->inst,
 229                                     spo->secondary->r,
 230                                     spo->secondary->g,
 231                                     spo->secondary->b);
 232     else spc->secondary = NULL;
 233
 234     if (spo->border_color != NULL)
 235         spc->border_color = RrColorNew(copy->inst,
 236                                        spo->border_color->r,
 237                                        spo->border_color->g,
 238                                        spo->border_color->b);
 239     else spc->border_color = NULL;
 240
 241     if (spo->interlace_color != NULL)
 242         spc->interlace_color = RrColorNew(copy->inst,
 243                                        spo->interlace_color->r,
 244                                        spo->interlace_color->g,
 245                                        spo->interlace_color->b);
 246     else spc->interlace_color = NULL;
 247
 248     if (spo->bevel_dark != NULL)
 249         spc->bevel_dark = RrColorNew(copy->inst,
 250                                      spo->bevel_dark->r,
 251                                      spo->bevel_dark->g,
 252                                      spo->bevel_dark->b);
 253     else spc->bevel_dark = NULL;
 254
 255     if (spo->bevel_light != NULL)
 256         spc->bevel_light = RrColorNew(copy->inst,
 257                                       spo->bevel_light->r,
 258                                       spo->bevel_light->g,
 259                                       spo->bevel_light->b);
 260     else spc->bevel_light = NULL;
 261
 262     spc->interlaced = spo->interlaced;
 263     spc->border = spo->border;
 264     spc->parent = NULL;
 265     spc->parentx = spc->parenty = 0;
 266     spc->pixel_data = NULL;
 267
 268     copy->textures = orig->textures;
 269     copy->texture = g_memdup(orig->texture,
 270                              orig->textures * sizeof(RrTexture));
 271     for (i = 0; i < copy->textures; ++i)
 272         if (copy->texture[i].type == RR_TEXTURE_RGBA) {
 273             copy->texture[i].data.rgba.cache = NULL;
 274         }
 275     copy->pixmap = None;
 276     copy->xftdraw = NULL;
 277     copy->w = copy->h = 0;
 278     return copy;
 279 }
 280
 281 void RrAppearanceFree(RrAppearance *a)
 282 {
 283     gint i;
 284
 285     if (a) {
 286         RrSurface *p;
 287         if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
 288         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 289         for (i = 0; i < a->textures; ++i)
 290             if (a->texture[i].type == RR_TEXTURE_RGBA) {
 291                 g_free(a->texture[i].data.rgba.cache);
 292                 a->texture[i].data.rgba.cache = NULL;
 293             }
 294         if (a->textures)
 295             g_free(a->texture);
 296         p = &a->surface;
 297         RrColorFree(p->primary);
 298         RrColorFree(p->secondary);
 299         RrColorFree(p->border_color);
 300         RrColorFree(p->interlace_color);
 301         RrColorFree(p->bevel_dark);
 302         RrColorFree(p->bevel_light);
 303         g_free(p->pixel_data);
 304         p->pixel_data = NULL;
 305         g_free(a);
 306     }
 307 }
 308
 309
 310 static void pixel_data_to_pixmap(RrAppearance *l,
 311                                  gint x, gint y, gint w, gint h)
 312 {
 313     RrPixel32 *in, *scratch;
 314     Pixmap out;
 315     XImage *im = NULL;
 316     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
 317                       ZPixmap, 0, NULL, w, h, 32, 0);
 318     g_assert(im != NULL);
 319
 320     in = l->surface.pixel_data;
 321     out = l->pixmap;
 322
 323 /* this malloc is a complete waste of time on normal 32bpp
 324    as reduce_depth just sets im->data = data and returns
 325 */
 326     scratch = g_new(RrPixel32, im->width * im->height);
 327     im->data = (gchar*) scratch;
 328     RrReduceDepth(l->inst, in, im);
 329     XPutImage(RrDisplay(l->inst), out,
 330               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
 331               im, 0, 0, x, y, w, h);
 332     im->data = NULL;
 333     XDestroyImage(im);
 334     g_free(scratch);
 335 }
 336
 337 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
 338 {
 339     *l = *t = *r = *b = 0;
 340
 341     if (a->surface.grad != RR_SURFACE_PARENTREL) {
 342         if (a->surface.relief != RR_RELIEF_FLAT) {
 343             switch (a->surface.bevel) {
 344             case RR_BEVEL_1:
 345                 *l = *t = *r = *b = 1;
 346                 break;
 347             case RR_BEVEL_2:
 348                 *l = *t = *r = *b = 2;
 349                 break;
 350             }
 351         } else if (a->surface.border) {
 352             *l = *t = *r = *b = 1;
 353         }
 354     }
 355 }
 356
 357 void RrMinSize(RrAppearance *a, gint *w, gint *h)
 358 {
 359     *w = RrMinWidth(a);
 360     *h = RrMinHeight(a);
 361 }
 362
 363 gint RrMinWidth(RrAppearance *a)
 364 {
 365     gint i;
 366     RrSize *m;
 367     gint l, t, r, b;
 368     gint w = 0;
 369
 370     for (i = 0; i < a->textures; ++i) {
 371         switch (a->texture[i].type) {
 372         case RR_TEXTURE_NONE:
 373             break;
 374         case RR_TEXTURE_MASK:
 375             w = MAX(w, a->texture[i].data.mask.mask->width);
 376             break;
 377         case RR_TEXTURE_TEXT:
 378             m = RrFontMeasureString(a->texture[i].data.text.font,
 379                                     a->texture[i].data.text.string,
 380                                     a->texture[i].data.text.shadow_offset_x,
 381                                     a->texture[i].data.text.shadow_offset_y);
 382             w = MAX(w, m->width);
 383             g_free(m);
 384             break;
 385         case RR_TEXTURE_RGBA:
 386             w += MAX(w, a->texture[i].data.rgba.width);
 387             break;
 388         case RR_TEXTURE_LINE_ART:
 389             w += MAX(w, MAX(a->texture[i].data.lineart.x1,
 390                             a->texture[i].data.lineart.x2));
 391             break;
 392         }
 393     }
 394
 395     RrMargins(a, &l, &t, &r, &b);
 396
 397     w += l + r;
 398
 399     if (w < 1) w = 1;
 400     return w;
 401 }
 402
 403 gint RrMinHeight(RrAppearance *a)
 404 {
 405     gint i;
 406     gint l, t, r, b;
 407     gint h = 0;
 408
 409     for (i = 0; i < a->textures; ++i) {
 410         switch (a->texture[i].type) {
 411         case RR_TEXTURE_NONE:
 412             break;
 413         case RR_TEXTURE_MASK:
 414             h = MAX(h, a->texture[i].data.mask.mask->height);
 415             break;
 416         case RR_TEXTURE_TEXT:
 417             h += MAX(h, RrFontHeight(a->texture[i].data.text.font,
 418                                      a->texture[i].data.text.shadow_offset_y));
 419             break;
 420         case RR_TEXTURE_RGBA:
 421             h += MAX(h, a->texture[i].data.rgba.height);
 422             break;
 423         case RR_TEXTURE_LINE_ART:
 424             h += MAX(h, MAX(a->texture[i].data.lineart.y1,
 425                             a->texture[i].data.lineart.y2));
 426             break;
 427         }
 428     }
 429
 430     RrMargins(a, &l, &t, &r, &b);
 431
 432     h += t + b;
 433
 434     if (h < 1) h = 1;
 435     return h;
 436 }
 437
 438 static void reverse_bits(gchar *c, gint n)
 439 {
 440     gint i;
 441     for (i = 0; i < n; i++, c++)
 442         *c = (((*c * 0x0802UL & 0x22110UL) |
 443                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
 444 }
 445
 446 gboolean RrPixmapToRGBA(const RrInstance *inst,
 447                         Pixmap pmap, Pixmap mask,
 448                         gint *w, gint *h, RrPixel32 **data)
 449 {
 450     Window xr;
 451     gint xx, xy;
 452     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
 453     XImage *xi, *xm = NULL;
 454
 455     if (!XGetGeometry(RrDisplay(inst), pmap,
 456                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
 457         return FALSE;
 458
 459     if (mask) {
 460         if (!XGetGeometry(RrDisplay(inst), mask,
 461                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
 462             return FALSE;
 463         if (pw != mw || ph != mh || xd != 1)
 464             return FALSE;
 465     }
 466
 467     xi = XGetImage(RrDisplay(inst), pmap,
 468                    0, 0, pw, ph, 0xffffffff, ZPixmap);
 469     if (!xi)
 470         return FALSE;
 471
 472     if (mask) {
 473         xm = XGetImage(RrDisplay(inst), mask,
 474                        0, 0, mw, mh, 0xffffffff, ZPixmap);
 475         if (!xm) {
 476             XDestroyImage(xi);
 477             return FALSE;
 478         }
 479         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
 480             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
 481     }
 482
 483     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
 484         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
 485
 486     *data = g_new(RrPixel32, pw * ph);
 487     RrIncreaseDepth(inst, *data, xi);
 488
 489     if (mask) {
 490         /* apply transparency from the mask */
 491         di = 0;
 492         for (i = 0, y = 0; y < ph; ++y) {
 493             for (x = 0; x < pw; ++x, ++i) {
 494                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
 495                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
 496             }
 497             di += xm->bytes_per_line;
 498         }
 499     }
 500
 501     *w = pw;
 502     *h = ph;
 503
 504     XDestroyImage(xi);
 505     if (mask)
 506         XDestroyImage(xm);
 507
 508     return TRUE;
 509 }