Skip to content
This repository
tag: mh-e-8.2.90
Fetching contributors…

Octocat-spinner-32-eaf2f5

Cannot retrieve contributors at this time

file 506 lines (407 sloc) 13.157 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505
/* Image support for the NeXT/Open/GNUstep and MacOSX window system.
Copyright (C) 1989, 1992-1994, 2005-2006, 2008-2011
Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs 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 3 of the License, or
(at your option) any later version.

GNU Emacs 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */

/*
Originally by Carl Edman
Updated by Christian Limpach (chris@nice.ch)
OpenStep/Rhapsody port by Scott Bender (sbender@harmony-ds.com)
MacOSX/Aqua port by Christophe de Dinechin (descubes@earthlink.net)
GNUstep port and post-20 update by Adrian Robert (arobert@cogsci.ucsd.edu)
*/

/* This should be the first include, as it may set up #defines affecting
interpretation of even the system includes. */
#include <config.h>
#include <setjmp.h>

#include "lisp.h"
#include "dispextern.h"
#include "nsterm.h"
#include "frame.h"

extern Lisp_Object QCfile, QCdata;

/* call tracing */
#if 0
int image_trace_num = 0;
#define NSTRACE(x) fprintf (stderr, "%s:%d: [%d] " #x "\n", \
__FILE__, __LINE__, ++image_trace_num)
#else
#define NSTRACE(x)
#endif


/* ==========================================================================

C interface. This allows easy calling from C files. We could just
compile everything as Objective-C, but that might mean slower
compilation and possible difficulties on some platforms..

========================================================================== */

void *
ns_image_from_XBM (unsigned char *bits, int width, int height)
{
  NSTRACE (ns_image_from_XBM);
  return [[EmacsImage alloc] initFromXBM: bits
                                   width: width height: height
                                    flip: YES];
}

void *
ns_image_for_XPM (int width, int height, int depth)
{
  NSTRACE (ns_image_for_XPM);
  return [[EmacsImage alloc] initForXPMWithDepth: depth
                                           width: width height: height];
}

void *
ns_image_from_file (Lisp_Object file)
{
  NSTRACE (ns_image_from_bitmap_file);
  return [EmacsImage allocInitFromFile: file];
}

int
ns_load_image (struct frame *f, struct image *img,
               Lisp_Object spec_file, Lisp_Object spec_data)
{
  EmacsImage *eImg = nil;
  NSSize size;

  NSTRACE (ns_load_image);

  if (STRINGP (spec_file))
    {
      eImg = [EmacsImage allocInitFromFile: spec_file];
    }
  else if (STRINGP (spec_data))
    {
      NSData *data;

      data = [NSData dataWithBytes: SDATA (spec_data)
length: SBYTES (spec_data)];
      eImg = [[EmacsImage alloc] initWithData: data];
      [eImg setPixmapData];
    }

  if (eImg == nil)
    {
      add_to_log ("Unable to load image %s", img->spec, Qnil);
      return 0;
    }

  size = [eImg size];
  img->width = size.width;
  img->height = size.height;

  /* 4) set img->pixmap = emacsimage */
  img->pixmap = eImg;
  return 1;
}


int
ns_image_width (void *img)
{
  return [(id)img size].width;
}

int
ns_image_height (void *img)
{
  return [(id)img size].height;
}

unsigned long
ns_get_pixel (void *img, int x, int y)
{
  return [(EmacsImage *)img getPixelAtX: x Y: y];
}

void
ns_put_pixel (void *img, int x, int y, unsigned long argb)
{
  unsigned char alpha = (argb >> 24) & 0xFF;
  if (alpha == 0)
    alpha = 0xFF;
  [(EmacsImage *)img setPixelAtX: x Y: y toRed: (argb >> 16) & 0xFF
   green: (argb >> 8) & 0xFF blue: (argb & 0xFF) alpha: alpha];
}

void
ns_set_alpha (void *img, int x, int y, unsigned char a)
{
  [(EmacsImage *)img setAlphaAtX: x Y: y to: a];
}


/* ==========================================================================

Class supporting bitmaps and images of various sorts.

========================================================================== */

@implementation EmacsImage

static EmacsImage *ImageList = nil;

+ allocInitFromFile: (Lisp_Object)file
{
  EmacsImage *image = ImageList;
  NSImageRep *imgRep;
  Lisp_Object found;

  /* look for an existing image of the same name */
  while (image != nil &&
         [[image name] compare: [NSString stringWithUTF8String: SDATA (file)]]
             != NSOrderedSame)
    image = [image imageListNext];

  if (image != nil)
    {
      [image reference];
      return image;
    }

  /* Search bitmap-file-path for the file, if appropriate. */
  found = x_find_image_file (file);
  if (!STRINGP (found))
    return nil;

  image = [[EmacsImage alloc] initByReferencingFile:
                     [NSString stringWithUTF8String: SDATA (found)]];

#if defined (NS_IMPL_COCOA) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6
  imgRep = [NSBitmapImageRep imageRepWithData:[image TIFFRepresentation]];
#else
  imgRep = [image bestRepresentationForDevice: nil];
#endif
  if (imgRep == nil)
    {
      [image release];
      return nil;
    }

  /* The next two lines cause the DPI of the image to be ignored.
This seems to be the behavior users expect. */
  [image setScalesWhenResized: YES];
  [image setSize: NSMakeSize([imgRep pixelsWide], [imgRep pixelsHigh])];

  [image setName: [NSString stringWithUTF8String: SDATA (file)]];
  [image reference];
  ImageList = [image imageListSetNext: ImageList];

  return image;
}


- reference
{
  refCount++;
  return self;
}


- imageListSetNext: (id)arg
{
  imageListNext = arg;
  return self;
}


- imageListNext
{
  return imageListNext;
}


- (void)dealloc
{
  id list = ImageList;

  if (refCount > 1)
    {
      refCount--;
      return;
    }

  [stippleMask release];

  if (list == self)
    ImageList = imageListNext;
  else
    {
      while (list != nil && [list imageListNext] != self)
        list = [list imageListNext];
      [list imageListSetNext: imageListNext];
    }

  [super dealloc];
}


- initFromXBM: (unsigned char *)bits width: (int)w height: (int)h
         flip: (BOOL)flip
{
  return [self initFromSkipXBM: bits width: w height: h flip: flip length: 0];
}


- initFromSkipXBM: (unsigned char *)bits width: (int)w height: (int)h
             flip: (BOOL)flip length: (int)length;
{
  int bpr = (w + 7) / 8;
  unsigned char *planes[5];

  [self initWithSize: NSMakeSize (w, h)];

  bmRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes: NULL
                                    pixelsWide: w pixelsHigh: h
                                    bitsPerSample: 8 samplesPerPixel: 4
                                    hasAlpha: YES isPlanar: YES
                                    colorSpaceName: NSCalibratedRGBColorSpace
                                    bytesPerRow: w bitsPerPixel: 0];

  [bmRep getBitmapDataPlanes: planes];
  {
    /* pull bits out to set the (bytewise) alpha mask */
    int i, j, k;
    unsigned char *s = bits;
    unsigned char *alpha = planes[3];
    unsigned char swt[16] = {0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13,
                             3, 11, 7, 15};
    unsigned char c, bitPat;

    for (j = 0; j < h; j++)
      for (i = 0; i < bpr; i++)
        {
          if (length)
            {
              unsigned char s1, s2;
              while (*s++ != 'x' && s < bits + length);
              if (s >= bits + length)
                {
                  [bmRep release];
                  return nil;
                }
#define hexchar(x) (isdigit (x) ? x - '0' : x - 'a' + 10)
              s1 = *s++;
              s2 = *s++;
              c = hexchar (s1) * 0x10 + hexchar (s2);
            }
          else
            c = *s++;

          bitPat = flip ? swt[c >> 4] | (swt[c & 0xf] << 4) : c ^ 255;
          for (k =0; k<8; k++)
            {
              *alpha++ = (bitPat & 0x80) ? 0xff : 0;
              bitPat <<= 1;
            }
        }
  }

  [self addRepresentation: bmRep];

  memset (planes[0], 0, w*h);
  memset (planes[1], 0, w*h);
  memset (planes[2], 0, w*h);
  [self setXBMColor: [NSColor blackColor]];
  return self;
}


/* Set color for a bitmap image (see initFromSkipXBM). Note that the alpha
is used as a mask, so we just memset the entire array. */
- setXBMColor: (NSColor *)color
{
  NSSize s = [self size];
  int len = (int) s.width * s.height;
  unsigned char *planes[5];
  CGFloat r, g, b, a;
  NSColor *rgbColor;

  if (bmRep == nil || color == nil)
    return self;

  if ([color colorSpaceName] != NSCalibratedRGBColorSpace)
    rgbColor = [color colorUsingColorSpaceName: NSCalibratedRGBColorSpace];
  else
    rgbColor = color;

  [rgbColor getRed: &r green: &g blue: &b alpha: &a];

  [bmRep getBitmapDataPlanes: planes];

  /* we used to just do this, but Cocoa seems to have a bug when rendering
an alpha-masked image onto a dark background where it bloats the mask */
   /* memset (planes[0..2], r, g, b*0xff, len); */
  {
    int i, len = s.width*s.height;
    int rr = r * 0xff, gg = g * 0xff, bb = b * 0xff;
    for (i =0; i<len; i++)
      if (planes[3][i] != 0)
        {
          planes[0][i] = rr;
          planes[1][i] = gg;
          planes[2][i] = bb;
        }
  }

  return self;
}


- initForXPMWithDepth: (int)depth width: (int)width height: (int)height
{
  NSSize s = {width, height};
  int i;

  [self initWithSize: s];

  bmRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes: NULL
                                  pixelsWide: width pixelsHigh: height
                                  /* keep things simple for now */
                                  bitsPerSample: 8 samplesPerPixel: 4 /*RGB+A*/
                                  hasAlpha: YES isPlanar: YES
                                  colorSpaceName: NSCalibratedRGBColorSpace
                                  bytesPerRow: width bitsPerPixel: 0];

  [bmRep getBitmapDataPlanes: pixmapData];
  for (i =0; i<4; i++)
    memset (pixmapData[i], 0, width*height);
  [self addRepresentation: bmRep];
  return self;
}


/* attempt to pull out pixmap data from a BitmapImageRep; returns NO if fails */
- (void) setPixmapData
{
  NSEnumerator *reps;
  NSImageRep *rep;

  reps = [[self representations] objectEnumerator];
  while (rep = (NSImageRep *) [reps nextObject])
    {
      if ([rep respondsToSelector: @selector (getBitmapDataPlanes:)])
        {
          bmRep = (NSBitmapImageRep *) rep;
          onTiger = [bmRep respondsToSelector: @selector (colorAtX:y:)];

          if ([bmRep numberOfPlanes] >= 3)
              [bmRep getBitmapDataPlanes: pixmapData];

          /* The next two lines cause the DPI of the image to be ignored.
This seems to be the behavior users expect. */
          [self setScalesWhenResized: YES];
          [self setSize: NSMakeSize([bmRep pixelsWide], [bmRep pixelsHigh])];

          break;
        }
    }
}


/* note; this and next work only for image created with initForXPMWithDepth,
initFromSkipXBM, or where setPixmapData was called successfully */
/* return ARGB */
- (unsigned long) getPixelAtX: (int)x Y: (int)y
{
  if (bmRep == nil)
    return 0;

  /* this method is faster but won't work for bitmaps */
  if (pixmapData[0] != NULL)
    {
      int loc = x + y * [self size].width;
      return (pixmapData[3][loc] << 24) /* alpha */
       | (pixmapData[0][loc] << 16) | (pixmapData[1][loc] << 8)
       | (pixmapData[2][loc]);
    }
  else if (onTiger)
    {
      NSColor *color = [bmRep colorAtX: x y: y];
      CGFloat r, g, b, a;
      [color getRed: &r green: &g blue: &b alpha: &a];
      return ((int)(a * 255.0) << 24)
        | ((int)(r * 255.0) << 16) | ((int)(g * 255.0) << 8)
        | ((int)(b * 255.0));

    }
  return 0;
}

- (void) setPixelAtX: (int)x Y: (int)y toRed: (unsigned char)r
               green: (unsigned char)g blue: (unsigned char)b
               alpha:(unsigned char)a;
{
  if (bmRep == nil)
    return;

  if (pixmapData[0] != NULL)
    {
      int loc = x + y * [self size].width;
      pixmapData[0][loc] = r;
      pixmapData[1][loc] = g;
      pixmapData[2][loc] = b;
      pixmapData[3][loc] = a;
    }
  else if (onTiger)
    {
      [bmRep setColor:
               [NSColor colorWithCalibratedRed: (r/255.0) green: (g/255.0)
                                          blue: (b/255.0) alpha: (a/255.0)]
                  atX: x y: y];
    }
}

- (void) setAlphaAtX: (int) x Y: (int) y to: (unsigned char) a
{
  if (bmRep == nil)
    return;

  if (pixmapData[0] != NULL)
    {
      int loc = x + y * [self size].width;

      pixmapData[3][loc] = a;
    }
  else if (onTiger)
    {
      NSColor *color = [bmRep colorAtX: x y: y];
      color = [color colorWithAlphaComponent: (a / 255.0)];
      [bmRep setColor: color atX: x y: y];
    }
}

/* returns a pattern color, which is cached here */
- (NSColor *)stippleMask
{
  if (stippleMask == nil)
      stippleMask = [[NSColor colorWithPatternImage: self] retain];
  return stippleMask;
}

@end

Something went wrong with that request. Please try again.