gimpbrushpipe.c 11.7 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 * Copyright (C) 1999 Adrian Likins and Tor Lillqvist
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

20 21 22 23
#include "config.h"

#include <math.h>
#include <stdio.h>
24
#include <stdlib.h>
25 26 27 28 29 30 31
#include <string.h>

#include "appenv.h"
#include "brush_header.h"
#include "pattern_header.h"
#include "patterns.h"
#include "gimpbrush.h"
32 33
#include "gimpbrushpipe.h"
#include "gimpbrushpipeP.h"
34 35 36 37
#include "paint_core.h"
#include "gimprc.h"
#include "libgimp/gimpintl.h"

38 39 40 41 42 43 44 45 46 47 48 49 50 51
static GimpBrushClass* gimp_brush_class;
static GtkObjectClass* gimp_object_class;

static GimpBrush *gimp_brush_pixmap_select_brush (PaintCore *paint_core);

static void paint_line_pixmap_mask(GImage	   *dest,
				   GimpDrawable    *drawable,
				   GimpBrushPixmap *brush,
				   guchar	   *d,
				   int		    x,
				   int              y,
				   int              bytes,
				   int              width);

52
static void
53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105
gimp_brush_pixmap_destroy (GtkObject *object)
{
  GimpBrushPixmap *pixmap;

  g_return_if_fail (GIMP_IS_BRUSH_PIXMAP (object));

  pixmap = GIMP_BRUSH_PIXMAP (object);
  
  temp_buf_free (pixmap->pixmap_mask);

  (* GTK_OBJECT_CLASS (gimp_object_class)->destroy) (object);
}

static void
gimp_brush_pixmap_class_init (GimpBrushPixmapClass *klass)
{
  GtkObjectClass *object_class;
  GimpBrushClass *brush_class;
  
  object_class = GTK_OBJECT_CLASS (klass);
  brush_class = GIMP_BRUSH_CLASS (klass);

  gimp_brush_class = gtk_type_class (gimp_brush_get_type ());

  object_class->destroy =  gimp_brush_pixmap_destroy;
  brush_class->select_brush = gimp_brush_pixmap_select_brush;
}

void
gimp_brush_pixmap_init (GimpBrushPixmap *brush)
{
  brush->pixmap_mask = NULL;
  brush->pipe = NULL;
}

GtkType
gimp_brush_pixmap_get_type (void)
{
  static GtkType type=0;
  if(!type){
    GtkTypeInfo info={
      "GimpBrushPixmap",
      sizeof (GimpBrushPixmap),
      sizeof (GimpBrushPixmapClass),
      (GtkClassInitFunc) gimp_brush_pixmap_class_init,
      (GtkObjectInitFunc) gimp_brush_pixmap_init,
     /* reserved_1 */ NULL,
     /* reserved_2 */ NULL,
    (GtkClassInitFunc) NULL};
    type = gtk_type_unique (GIMP_TYPE_BRUSH, &info);
  }
  return type;
}
106

107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127
static GimpBrush *
gimp_brush_pixmap_select_brush (PaintCore *paint_core)
{
  GimpBrushPixmap *pixmap;

  g_return_val_if_fail (GIMP_IS_BRUSH_PIXMAP (paint_core->brush), NULL);

  pixmap = GIMP_BRUSH_PIXMAP (paint_core->brush);

  if (pixmap->pipe->nbrushes == 1)
    return GIMP_BRUSH (pixmap->pipe->current);

  /* Just select the next one for now. This is the place where we
   * will select the correct brush based on various parameters
   * in paint_core.
   */
  pixmap->pipe->index[0] = (pixmap->pipe->index[0] + 1) % pixmap->pipe->nbrushes;
  pixmap->pipe->current = pixmap->pipe->brushes[pixmap->pipe->index[0]];

  return GIMP_BRUSH (pixmap->pipe->current);
}
128 129 130 131

static void
gimp_brush_pipe_destroy(GtkObject *object)
{
132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150
  GimpBrushPipe *pipe;
  int i;

  g_return_if_fail (object != NULL);
  g_return_if_fail (GIMP_IS_BRUSH_PIPE (object));

  pipe = GIMP_BRUSH_PIPE (object);

  g_free (pipe->rank);

  for (i = 1; i < pipe->nbrushes; i++)
    gimp_object_destroy (pipe->brushes[i]);

  g_free (pipe->brushes);
  g_free (pipe->select);
  g_free (pipe->index);

  if (GTK_OBJECT_CLASS (gimp_object_class)->destroy)
    (* GTK_OBJECT_CLASS (gimp_object_class)->destroy) (object);
151 152 153 154 155 156 157
}

static void
gimp_brush_pipe_class_init (GimpBrushPipeClass *klass)
{
  GtkObjectClass *object_class;
  
158 159 160 161
  object_class = GTK_OBJECT_CLASS (klass);

  gimp_object_class = gtk_type_class (GIMP_TYPE_OBJECT);
  object_class->destroy =  gimp_brush_pipe_destroy;
162 163 164
}

void
165
gimp_brush_pipe_init (GimpBrushPipe *pipe)
166
{
167 168 169 170 171
  pipe->dimension = 0;
  pipe->rank = NULL;
  pipe->nbrushes = 0;
  pipe->select = NULL;
  pipe->index = NULL;
172 173
}

174 175
GtkType
gimp_brush_pipe_get_type (void)
176 177
{
  static GtkType type=0;
178
  if (!type){
179 180
    GtkTypeInfo info={
      "GimpBrushPipe",
181 182 183 184 185 186
      sizeof (GimpBrushPipe),
      sizeof (GimpBrushPipeClass),
      (GtkClassInitFunc) gimp_brush_pipe_class_init,
      (GtkObjectInitFunc) gimp_brush_pipe_init,
     /* reserved_1 */ NULL,
     /* reserved_2 */ NULL,
187
    (GtkClassInitFunc) NULL};
188
    type = gtk_type_unique (GIMP_TYPE_BRUSH_PIXMAP, &info);
189 190 191 192 193
  }
  return type;
}

GimpBrushPipe *
194
gimp_brush_pipe_load (char *filename)
195 196 197 198
{
  GimpBrushPipe *pipe;
  GPatternP pattern;
  FILE *fp;
199 200
  guchar buf[1024];
  guchar *name;
201
  int num_of_brushes;
202
  guchar *params;
203

204 205
  if ((fp = fopen (filename, "rb")) == NULL)
    return NULL;
206

207 208 209 210 211 212 213 214 215
  /* The file format starts with a painfully simple text header
   * and we use a painfully simple way to read it
   */
  if (fgets (buf, 1024, fp) == NULL)
    {
      fclose (fp);
      return NULL;
    }
  buf[strlen (buf) - 1] = 0;
216

217 218
  pipe = GIMP_BRUSH_PIPE (gimp_type_new (GIMP_TYPE_BRUSH_PIPE));
  name = g_strdup (buf);
219 220

  /* get the number of brushes */
221 222 223 224 225 226 227 228 229 230 231 232 233 234
  if (fgets (buf, 1024, fp) == NULL)
    {
      fclose (fp);
      gimp_object_destroy (pipe);
      return NULL;
    }
  num_of_brushes = strtol(buf, &params, 10);
  if (num_of_brushes < 1)
    {
      g_message (_("pixmap brush pipe should have at least one brush"));
      fclose (fp);
      gimp_object_destroy (pipe);
      return NULL;
    }
235

236 237 238 239 240 241 242 243 244 245
  /* Here we should parse the params to get the dimension, ranks,
   * placement options, etc. But just use defaults for now.
   */
  pipe->dimension = 1;
  pipe->rank = g_new (int, 1);
  pipe->rank[0] = num_of_brushes;
  pipe->select = g_new (PipeSelectModes, 1);
  pipe->select[0] = PIPE_SELECT_INCREMENTAL;
  pipe->index = g_new (int, 1);
  pipe->index[0] = 0;
246

247 248 249 250
  pattern = (GPatternP) g_malloc (sizeof (GPattern));
  pattern->filename = NULL;
  pattern->name = NULL;
  pattern->mask = NULL;
251

252 253
  pipe->brushes =
    (GimpBrushPixmap **) g_new0 (GimpBrushPixmap *, num_of_brushes);
254

255 256
  /* First pixmap brush in the list is the pipe itself */
  pipe->brushes[0] = GIMP_BRUSH_PIXMAP (pipe);
257

258 259 260 261 262 263
  /* Current pixmap brush is the first one. */
  pipe->current = pipe->brushes[0];

  while (pipe->nbrushes < num_of_brushes)
    {
      if (pipe->nbrushes > 0)
264
	{
265 266 267
	  pipe->brushes[pipe->nbrushes] =
	    GIMP_BRUSH_PIXMAP (gimp_type_new (GIMP_TYPE_BRUSH_PIXMAP));
	  GIMP_BRUSH (pipe->brushes[pipe->nbrushes])->name = NULL;
268
	}
269 270
      
      pipe->brushes[pipe->nbrushes]->pipe = pipe;
271

272 273 274 275
      /* load the brush */
      if (!gimp_brush_load_brush (GIMP_BRUSH (pipe->brushes[pipe->nbrushes]),
				  fp, filename)
	  || !load_pattern_pattern (pattern, fp, filename))
276
       {
277 278 279 280
	  g_message (_("failed to load one of the pixmap brushes in the pipe"));
	  fclose (fp);
	  g_free (pattern);
	  gimp_object_destroy (pipe);
281 282
	  return NULL;
       }
283 284 285 286 287 288 289 290 291

      if (pipe->nbrushes == 0)
	{
	  /* Replace name with the whole pipe's name */
	  GIMP_BRUSH (pipe)->name = name;
	}
      pipe->brushes[pipe->nbrushes]->pixmap_mask = pattern->mask;

      pipe->nbrushes++;
292
    }
293 294

  /*  Clean up  */
295 296
  fclose (fp);

297 298 299 300 301 302 303 304 305 306 307 308 309 310 311
  g_free(pattern);
  return pipe;
}

GimpBrushPipe *
gimp_brush_pixmap_load (char *filename)
{
  GimpBrushPipe *pipe;
  GPatternP pattern;
  FILE *fp;

  if ((fp = fopen (filename, "rb")) == NULL)
    return NULL;

  pipe = GIMP_BRUSH_PIPE (gimp_type_new (GIMP_TYPE_BRUSH_PIPE));
312

313 314 315 316 317 318 319 320
  /* A (single) pixmap brush is a pixmap pipe brush with just one pixmap */
  pipe->dimension = 1;
  pipe->rank = g_new (int, 1);
  pipe->rank[0] = 1;
  pipe->select = g_new (PipeSelectModes, 1);
  pipe->select[0] = PIPE_SELECT_INCREMENTAL;
  pipe->index = g_new (int, 1);
  pipe->index[0] = 0;
321

322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352
  pattern = (GPatternP) g_malloc (sizeof (GPattern));
  pattern->filename = NULL;
  pattern->name = NULL;
  pattern->mask = NULL;

  pipe->brushes = (GimpBrushPixmap **) g_new (GimpBrushPixmap *, 1);

  pipe->brushes[0] = GIMP_BRUSH_PIXMAP (pipe);
  pipe->current = pipe->brushes[0];

  pipe->brushes[0]->pipe = pipe;

  /* load the brush */
  if (!gimp_brush_load_brush (GIMP_BRUSH (pipe->brushes[0]),
			      fp, filename)
      || !load_pattern_pattern (pattern, fp, filename))
    {
      g_message (_("failed to load pixmap brush"));
      fclose (fp);
      g_free (pattern);
      gimp_object_destroy (pipe);
      return NULL;
    }
  
  pipe->brushes[0]->pixmap_mask = pattern->mask;

  pipe->nbrushes = 1;
  /*  Clean up  */
  fclose (fp);

  g_free(pattern);
353
  return pipe;
354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389
}

TempBuf *
gimp_brush_pixmap_pixmap (GimpBrushPixmap *brush)
{
  g_return_val_if_fail (brush != NULL, NULL);
  g_return_val_if_fail (GIMP_IS_BRUSH_PIXMAP (brush), NULL);

  return brush->pixmap_mask;
}

void
color_area_with_pixmap (PaintCore *paint_core,
			GImage *dest,
			GimpDrawable *drawable,
			TempBuf *area)
{

  PixelRegion destPR;
  void *pr;
  guchar *d;
  int ulx, uly, offsetx, offsety, y;
  GimpBrushPixmap *pixmap;
  
  g_return_if_fail (GIMP_IS_BRUSH_PIXMAP (paint_core->brush));

  pixmap = GIMP_BRUSH_PIXMAP (paint_core->brush);

  destPR.bytes = area->bytes;
  destPR.x = 0; destPR.y = 0;
  destPR.w = area->width;
  destPR.h = area->height;
  destPR.rowstride = destPR.bytes * area->width;
  destPR.data = temp_buf_data (area);
		
  pr = pixel_regions_register (1, &destPR);
390

391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424
  /* Calculate upper left corner of brush as in
   * paint_core_get_paint_area.  Ugly to have to do this here, too.
   */

  ulx = (int) paint_core->curx - (paint_core->brush->mask->width >> 1);
  uly = (int) paint_core->cury - (paint_core->brush->mask->height >> 1);

  offsetx = area->x - ulx;
  offsety = area->y - uly;

  for (; pr != NULL; pr = pixel_regions_process (pr))
    {
      d = destPR.data;
      for (y = 0; y < destPR.h; y++)
	{
	  paint_line_pixmap_mask (dest, drawable, pixmap,
				  d, offsetx, y + offsety,
				  destPR.bytes, destPR.w);
	  d += destPR.rowstride;
	}
    }
}

static void
paint_line_pixmap_mask (GImage          *dest,
			GimpDrawable    *drawable,
			GimpBrushPixmap *brush,
			guchar	        *d,
			int		 x,
			int              y,
			int              bytes,
			int              width)
{
  guchar *b, *p;
425 426 427 428 429 430
  int x_index;
  gdouble alpha;
  gdouble factor = 0.00392156986;  /* 1.0/255.0 */
  gint i;
  gint j;
  guchar *mask;
431 432 433 434 435 436 437 438 439 440 441

  /*  Make sure x, y are positive  */
  while (x < 0)
    x += brush->pixmap_mask->width;
  while (y < 0)
    y += brush->pixmap_mask->height;

  /* Point to the approriate scanline */
  b = temp_buf_data (brush->pixmap_mask) +
    (y % brush->pixmap_mask->height) * brush->pixmap_mask->width * brush->pixmap_mask->bytes;
    
442 443 444 445
  /* ditto, except for the brush mask, so we can pre-multiply the alpha value */
  mask = temp_buf_data((brush->gbrush).mask) +
    (y % brush->pixmap_mask->height) * brush->pixmap_mask->width;
 
446 447
  for (i = 0; i < width; i++)
    {
448 449 450 451 452 453 454 455 456 457 458 459
      /* attempt to avoid doing this calc twice in the loop */
      x_index = ((i + x) % brush->pixmap_mask->width);
      p = b + x_index * brush->pixmap_mask->bytes;
      d[bytes-1] = mask[x_index];

      /* multiply alpha into the pixmap data */
      /* maybe we could do this at tool creation or brush switch time? */
      /* and compute it for the whole brush at once and cache it?  */
      alpha = d[bytes-1] * factor;
      d[0] *= alpha;
      d[1] *= alpha;
      d[2] *= alpha;
460 461 462 463
      /* printf("i: %i d->r: %i d->g: %i d->b: %i d->a: %i\n",i,(int)d[0], (int)d[1], (int)d[2], (int)d[3]); */
      gimage_transform_color (dest, drawable, p, d, RGB);
      d += bytes;
    }
464
}
465