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)
 118                     || (a->surface.interlaced))
 119                     pixel_data_to_pixmap(a, 0, 0, w, h);
 120             }
 121             if (a->xftdraw == NULL) {
 122                 a->xftdraw = XftDrawCreate(RrDisplay(a->inst), a->pixmap,
 123                                            RrVisual(a->inst),
 124                                            RrColormap(a->inst));
 125             }
 126             RrFontDraw(a->xftdraw, &a->texture[i].data.text, &tarea);
 127             break;
 128         case RR_TEXTURE_LINE_ART:
 129             if (!transferred) {
 130                 transferred = 1;
 131                 if ((a->surface.grad != RR_SURFACE_SOLID)
 132                     || (a->surface.interlaced))
 133                     pixel_data_to_pixmap(a, 0, 0, w, h);
 134             }
 135             XDrawLine(RrDisplay(a->inst), a->pixmap,
 136                       RrColorGC(a->texture[i].data.lineart.color),
 137                       a->texture[i].data.lineart.x1,
 138                       a->texture[i].data.lineart.y1,
 139                       a->texture[i].data.lineart.x2,
 140                       a->texture[i].data.lineart.y2);
 141             break;
 142         case RR_TEXTURE_MASK:
 143             if (!transferred) {
 144                 transferred = 1;
 145                 if ((a->surface.grad != RR_SURFACE_SOLID)
 146                     || (a->surface.interlaced))
 147                     pixel_data_to_pixmap(a, 0, 0, w, h);
 148             }
 149             RrPixmapMaskDraw(a->pixmap, &a->texture[i].data.mask, &tarea);
 150             break;
 151         case RR_TEXTURE_RGBA:
 152             g_assert(!transferred);
 153             RrImageDraw(a->surface.pixel_data,
 154                         &a->texture[i].data.rgba,
 155                         a->w, a->h,
 156                         &tarea);
 157         break;
 158         }
 159     }
 160
 161     if (!transferred) {
 162         transferred = 1;
 163         if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced))
 164             pixel_data_to_pixmap(a, 0, 0, w, h);
 165     }
 166
 167     XSetWindowBackgroundPixmap(RrDisplay(a->inst), win, a->pixmap);
 168     XClearWindow(RrDisplay(a->inst), win);
 169     if (oldp) XFreePixmap(RrDisplay(a->inst), oldp);
 170 }
 171
 172 RrAppearance *RrAppearanceNew(const RrInstance *inst, gint numtex)
 173 {
 174   RrAppearance *out;
 175
 176   out = g_new0(RrAppearance, 1);
 177   out->inst = inst;
 178   out->textures = numtex;
 179   if (numtex) out->texture = g_new0(RrTexture, numtex);
 180
 181   return out;
 182 }
 183
 184 RrAppearance *RrAppearanceCopy(RrAppearance *orig)
 185 {
 186     RrSurface *spo, *spc;
 187     RrAppearance *copy = g_new(RrAppearance, 1);
 188     gint i;
 189
 190     copy->inst = orig->inst;
 191
 192     spo = &(orig->surface);
 193     spc = &(copy->surface);
 194     spc->grad = spo->grad;
 195     spc->relief = spo->relief;
 196     spc->bevel = spo->bevel;
 197     if (spo->primary != NULL)
 198         spc->primary = RrColorNew(copy->inst,
 199                                   spo->primary->r,
 200                                   spo->primary->g,
 201                                   spo->primary->b);
 202     else spc->primary = NULL;
 203
 204     if (spo->secondary != NULL)
 205         spc->secondary = RrColorNew(copy->inst,
 206                                     spo->secondary->r,
 207                                     spo->secondary->g,
 208                                     spo->secondary->b);
 209     else spc->secondary = NULL;
 210
 211     if (spo->border_color != NULL)
 212         spc->border_color = RrColorNew(copy->inst,
 213                                        spo->border_color->r,
 214                                        spo->border_color->g,
 215                                        spo->border_color->b);
 216     else spc->border_color = NULL;
 217
 218     if (spo->interlace_color != NULL)
 219         spc->interlace_color = RrColorNew(copy->inst,
 220                                        spo->interlace_color->r,
 221                                        spo->interlace_color->g,
 222                                        spo->interlace_color->b);
 223     else spc->interlace_color = NULL;
 224
 225     if (spo->bevel_dark != NULL)
 226         spc->bevel_dark = RrColorNew(copy->inst,
 227                                      spo->bevel_dark->r,
 228                                      spo->bevel_dark->g,
 229                                      spo->bevel_dark->b);
 230     else spc->bevel_dark = NULL;
 231
 232     if (spo->bevel_light != NULL)
 233         spc->bevel_light = RrColorNew(copy->inst,
 234                                       spo->bevel_light->r,
 235                                       spo->bevel_light->g,
 236                                       spo->bevel_light->b);
 237     else spc->bevel_light = NULL;
 238
 239     spc->interlaced = spo->interlaced;
 240     spc->border = spo->border;
 241     spc->parent = NULL;
 242     spc->parentx = spc->parenty = 0;
 243     spc->pixel_data = NULL;
 244
 245     copy->textures = orig->textures;
 246     copy->texture = g_memdup(orig->texture,
 247                              orig->textures * sizeof(RrTexture));
 248     for (i = 0; i < copy->textures; ++i)
 249         if (copy->texture[i].type == RR_TEXTURE_RGBA) {
 250             copy->texture[i].data.rgba.cache = NULL;
 251         }
 252     copy->pixmap = None;
 253     copy->xftdraw = NULL;
 254     copy->w = copy->h = 0;
 255     return copy;
 256 }
 257
 258 void RrAppearanceFree(RrAppearance *a)
 259 {
 260     gint i;
 261
 262     if (a) {
 263         RrSurface *p;
 264         if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
 265         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 266         for (i = 0; i < a->textures; ++i)
 267             if (a->texture[i].type == RR_TEXTURE_RGBA) {
 268                 g_free(a->texture[i].data.rgba.cache);
 269                 a->texture[i].data.rgba.cache = NULL;
 270             }
 271         if (a->textures)
 272             g_free(a->texture);
 273         p = &a->surface;
 274         RrColorFree(p->primary);
 275         RrColorFree(p->secondary);
 276         RrColorFree(p->border_color);
 277         RrColorFree(p->interlace_color);
 278         RrColorFree(p->bevel_dark);
 279         RrColorFree(p->bevel_light);
 280         g_free(p->pixel_data);
 281         p->pixel_data = NULL;
 282         g_free(a);
 283     }
 284 }
 285
 286
 287 static void pixel_data_to_pixmap(RrAppearance *l,
 288                                  gint x, gint y, gint w, gint h)
 289 {
 290     RrPixel32 *in, *scratch;
 291     Pixmap out;
 292     XImage *im = NULL;
 293     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
 294                       ZPixmap, 0, NULL, w, h, 32, 0);
 295     g_assert(im != NULL);
 296
 297     in = l->surface.pixel_data;
 298     out = l->pixmap;
 299
 300 /* this malloc is a complete waste of time on normal 32bpp
 301    as reduce_depth just sets im->data = data and returns
 302 */
 303     scratch = g_new(RrPixel32, im->width * im->height);
 304     im->data = (gchar*) scratch;
 305     RrReduceDepth(l->inst, in, im);
 306     XPutImage(RrDisplay(l->inst), out,
 307               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
 308               im, 0, 0, x, y, w, h);
 309     im->data = NULL;
 310     XDestroyImage(im);
 311     g_free(scratch);
 312 }
 313
 314 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
 315 {
 316     *l = *t = *r = *b = 0;
 317
 318     if (a->surface.grad != RR_SURFACE_PARENTREL) {
 319         if (a->surface.relief != RR_RELIEF_FLAT) {
 320             switch (a->surface.bevel) {
 321             case RR_BEVEL_1:
 322                 *l = *t = *r = *b = 1;
 323                 break;
 324             case RR_BEVEL_2:
 325                 *l = *t = *r = *b = 2;
 326                 break;
 327             }
 328         } else if (a->surface.border) {
 329             *l = *t = *r = *b = 1;
 330         }
 331     }
 332 }
 333
 334 void RrMinsize(RrAppearance *a, gint *w, gint *h)
 335 {
 336     gint i;
 337     RrSize *m;
 338     gint l, t, r, b;
 339     *w = *h = 0;
 340
 341     for (i = 0; i < a->textures; ++i) {
 342         switch (a->texture[i].type) {
 343         case RR_TEXTURE_NONE:
 344             break;
 345         case RR_TEXTURE_MASK:
 346             *w = MAX(*w, a->texture[i].data.mask.mask->width);
 347             *h = MAX(*h, a->texture[i].data.mask.mask->height);
 348             break;
 349         case RR_TEXTURE_TEXT:
 350             m = RrFontMeasureString(a->texture[i].data.text.font,
 351                                     a->texture[i].data.text.string);
 352             *w = MAX(*w, m->width + 4);
 353             m->height = RrFontHeight(a->texture[i].data.text.font);
 354             *h += MAX(*h, m->height);
 355             g_free(m);
 356             break;
 357         case RR_TEXTURE_RGBA:
 358             *w += MAX(*w, a->texture[i].data.rgba.width);
 359             *h += MAX(*h, a->texture[i].data.rgba.height);
 360             break;
 361         case RR_TEXTURE_LINE_ART:
 362             *w += MAX(*w, MAX(a->texture[i].data.lineart.x1,
 363                               a->texture[i].data.lineart.x2));
 364             *h += MAX(*h, MAX(a->texture[i].data.lineart.y1,
 365                               a->texture[i].data.lineart.y2));
 366             break;
 367         }
 368     }
 369
 370     RrMargins(a, &l, &t, &r, &b);
 371
 372     *w += l + r;
 373     *h += t + b;
 374
 375     if (*w < 1) *w = 1;
 376     if (*h < 1) *h = 1;
 377 }
 378
 379 static void reverse_bits(gchar *c, gint n)
 380 {
 381     gint i;
 382     for (i = 0; i < n; i++, c++)
 383         *c = (((*c * 0x0802UL & 0x22110UL) |
 384                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
 385 }
 386
 387 gboolean RrPixmapToRGBA(const RrInstance *inst,
 388                         Pixmap pmap, Pixmap mask,
 389                         gint *w, gint *h, RrPixel32 **data)
 390 {
 391     Window xr;
 392     gint xx, xy;
 393     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
 394     XImage *xi, *xm = NULL;
 395
 396     if (!XGetGeometry(RrDisplay(inst), pmap,
 397                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
 398         return FALSE;
 399
 400     if (mask) {
 401         if (!XGetGeometry(RrDisplay(inst), mask,
 402                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
 403             return FALSE;
 404         if (pw != mw || ph != mh || xd != 1)
 405             return FALSE;
 406     }
 407
 408     xi = XGetImage(RrDisplay(inst), pmap,
 409                    0, 0, pw, ph, 0xffffffff, ZPixmap);
 410     if (!xi)
 411         return FALSE;
 412
 413     if (mask) {
 414         xm = XGetImage(RrDisplay(inst), mask,
 415                        0, 0, mw, mh, 0xffffffff, ZPixmap);
 416         if (!xm) {
 417             XDestroyImage(xi);
 418             return FALSE;
 419         }
 420         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
 421             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
 422     }
 423
 424     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
 425         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
 426
 427     *data = g_new(RrPixel32, pw * ph);
 428     RrIncreaseDepth(inst, *data, xi);
 429
 430     if (mask) {
 431         /* apply transparency from the mask */
 432         di = 0;
 433         for (i = 0, y = 0; y < ph; ++y) {
 434             for (x = 0; x < pw; ++x, ++i) {
 435                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
 436                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
 437             }
 438             di += xm->bytes_per_line;
 439         }
 440     }
 441
 442     *w = pw;
 443     *h = ph;
 444
 445     XDestroyImage(xi);
 446     if (mask)
 447         XDestroyImage(xm);
 448
 449     return TRUE;
 450 }