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