summaryrefslogtreecommitdiff
path: root/source/fitz/separation.c
blob: 0baf30b4ea3c15482f80cc1b61b598687c111f10 (plain)
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
#include "mupdf/fitz.h"

enum
{
	FZ_SEPARATION_DISABLED_RENDER = 3
};


struct fz_separations_s
{
	int refs;
	int num_separations;
	int controllable;
	uint32_t state[(2*FZ_MAX_SEPARATIONS + 31) / 32];
	uint32_t equiv_rgb[FZ_MAX_SEPARATIONS];
	uint32_t equiv_cmyk[FZ_MAX_SEPARATIONS];
	char *name[FZ_MAX_SEPARATIONS];
};

fz_separations *fz_new_separations(fz_context *ctx, int controllable)
{
	fz_separations *sep;

	sep = fz_malloc_struct(ctx, fz_separations);
	sep->refs = 1;
	sep->controllable = controllable;

	return sep;
}

fz_separations *fz_keep_separations(fz_context *ctx, fz_separations *sep)
{
	return fz_keep_imp(ctx, sep, &sep->refs);
}

void fz_drop_separations(fz_context *ctx, fz_separations *sep)
{
	if (fz_drop_imp(ctx, sep, &sep->refs))
	{
		int i;
		for (i = 0; i < sep->num_separations; i++)
			fz_free(ctx, sep->name[i]);
		fz_free(ctx, sep);
	}
}

void fz_add_separation(fz_context *ctx, fz_separations *sep, uint32_t rgb, uint32_t cmyk, const char *name)
{
	int n;

	if (!sep)
		fz_throw(ctx, FZ_ERROR_GENERIC, "can't add to non-existent separations");

	n = sep->num_separations;
	if (n == FZ_MAX_SEPARATIONS)
		fz_throw(ctx, FZ_ERROR_GENERIC, "too many separations");

	sep->name[n] = fz_strdup(ctx, name);
	sep->equiv_rgb[n] = rgb;
	sep->equiv_cmyk[n] = cmyk;

	sep->num_separations++;
}

int fz_separations_controllable(fz_context *ctx, const fz_separations *sep)
{
	return (!sep || sep->controllable);
}

void fz_set_separation_behavior(fz_context *ctx, fz_separations *sep, int separation, fz_separation_behavior beh)
{
	int shift;
	fz_separation_behavior old;

	if (!sep || separation < 0 || separation >= sep->num_separations)
		fz_throw(ctx, FZ_ERROR_GENERIC, "can't control non-existent separation");

	if (beh == FZ_SEPARATION_DISABLED && !sep->controllable)
		beh = FZ_SEPARATION_DISABLED_RENDER;

	shift = ((2*separation) & 31);
	separation >>= 4;

	old = (sep->state[separation]>>shift) & 3;

	if (old == (fz_separation_behavior)FZ_SEPARATION_DISABLED_RENDER)
		old = FZ_SEPARATION_DISABLED;

	/* If no change, great */
	if (old == beh)
		return;

	sep->state[separation] = (sep->state[separation] & ~(3<<shift)) | (beh<<shift);

	/* FIXME: Could only empty images from the store, or maybe only
	 * images that depend on separations. */
	fz_empty_store(ctx);
}

static inline fz_separation_behavior
sep_state(const fz_separations *sep, int i)
{
	return (fz_separation_behavior)((sep->state[i>>5]>>((2*i) & 31)) & 3);
}

fz_separation_behavior fz_separation_current_behavior_internal(fz_context *ctx, const fz_separations *sep, int separation)
{
	if (!sep || separation < 0 || separation >= sep->num_separations)
		fz_throw(ctx, FZ_ERROR_GENERIC, "can't disable non-existent separation");

	return sep_state(sep, separation);
}

fz_separation_behavior fz_separation_current_behavior(fz_context *ctx, const fz_separations *sep, int separation)
{
	int beh = fz_separation_current_behavior_internal(ctx, sep, separation);

	if (beh == FZ_SEPARATION_DISABLED_RENDER)
		return FZ_SEPARATION_DISABLED;
	return beh;
}

int fz_separations_all_composite(fz_context *ctx, const fz_separations *sep)
{
	int i;

	if (!sep)
		return 1;

	for (i = 0; i < (FZ_MAX_SEPARATIONS + 31) / 32; i++)
		if (sep->state[i] != FZ_SEPARATION_COMPOSITE)
			return 0;

	return 1;
}

const char *fz_get_separation(fz_context *ctx, const fz_separations *sep, int separation, uint32_t *rgb, uint32_t *cmyk)
{
	if (!sep || separation < 0 || separation >= sep->num_separations)
		fz_throw(ctx, FZ_ERROR_GENERIC, "can't access non-existent separation");

	if (rgb)
		*rgb = sep->equiv_rgb[separation];
	if (cmyk)
		*cmyk = sep->equiv_cmyk[separation];

	return sep->name[separation];
}

int fz_count_separations(fz_context *ctx, const fz_separations *sep)
{
	if (!sep)
		return 0;
	return sep->num_separations;
}

int fz_count_active_separations(fz_context *ctx, const fz_separations *sep)
{
	int i, n, c;

	if (!sep)
		return 0;
	n = sep->num_separations;
	c = 0;
	for (i = 0; i < n; i++)
		if (sep_state(sep, i) == FZ_SEPARATION_SPOT)
			c++;
	return c;
}

fz_separations *fz_clone_separations_for_overprint(fz_context *ctx, fz_separations *sep)
{
	int i, j, n, c;
	fz_separations *clone;

	if (!sep)
		return NULL;

	n = sep->num_separations;
	c = 0;
	for (i = 0; i < n; i++)
	{
		fz_separation_behavior state = sep_state(sep, i);
		if (state == FZ_SEPARATION_COMPOSITE)
			c++;
	}

	/* If no composites, then we are fine to render direct. */
	if (c == 0)
		return NULL;

	/* We need to clone us a separation structure, with all
	 * the composite separations marked as enabled. */
	clone = fz_malloc_struct(ctx, fz_separations);

	fz_try(ctx)
	{
		clone->refs = 1;
		clone->controllable = 0;
		for (i = 0; i < n; i++)
		{
			fz_separation_behavior beh = sep_state(sep, i);
			if (beh == FZ_SEPARATION_DISABLED)
				continue;
			j = clone->num_separations++;
			if (beh == FZ_SEPARATION_COMPOSITE)
				beh = FZ_SEPARATION_SPOT;
			fz_set_separation_behavior(ctx, clone, j, beh);
			clone->name[j] = sep->name[i] ? fz_strdup(ctx, sep->name[i]) : NULL;
			clone->equiv_rgb[j] = sep->equiv_rgb[i];
			clone->equiv_cmyk[j] = sep->equiv_cmyk[i];
		}
	}
	fz_catch(ctx)
	{
		fz_drop_separations(ctx, clone);
		fz_rethrow(ctx);
	}

	return clone;
}

fz_pixmap *
fz_clone_pixmap_area_with_different_seps(fz_context *ctx, fz_pixmap *src, const fz_irect *bbox, fz_colorspace *dcs, fz_separations *dseps, fz_colorspace *prf, fz_default_colorspaces *default_cs)
{
	fz_irect local_bbox;
	fz_pixmap *dst;
	fz_colorspace *oi = fz_default_output_intent(ctx, default_cs);

	if (fz_colorspace_n(ctx, dcs) == fz_colorspace_n(ctx, oi))
		dcs = oi;

	if (bbox == NULL)
	{
		local_bbox.x0 = src->x;
		local_bbox.y0 = src->y;
		local_bbox.x1 = src->x + src->w;
		local_bbox.y1 = src->y + src->h;
		bbox = &local_bbox;
	}

	dst = fz_new_pixmap_with_bbox(ctx, dcs, bbox, dseps, src->alpha);
	if (src->flags & FZ_PIXMAP_FLAG_INTERPOLATE)
		dst->flags |= FZ_PIXMAP_FLAG_INTERPOLATE;
	else
		dst->flags &= ~FZ_PIXMAP_FLAG_INTERPOLATE;

	return fz_copy_pixmap_area_converting_seps(ctx, dst, src, prf, default_cs);
}

fz_pixmap *
fz_copy_pixmap_area_converting_seps(fz_context *ctx, fz_pixmap *dst, fz_pixmap *src, fz_colorspace *prf, fz_default_colorspaces *default_cs)
{
	int dw = dst->w;
	int dh = dst->h;
	fz_separations *sseps = src->seps;
	fz_separations *dseps = dst->seps;
	int sseps_n = sseps ? sseps->num_separations : 0;
	int dseps_n = dseps ? dseps->num_separations : 0;
	int sstride = src->stride;
	int dstride = dst->stride;
	int sn = src->n;
	int dn = dst->n;
	int sa = src->alpha;
	int da = dst->alpha;
	int ss = src->s;
	int ds = dst->s;
	int sc = sn - ss - sa;
	int dc = dn - ds - da;
	const unsigned char *sdata = src->samples + sstride * (dst->y - src->y) + (dst->x - src->x) * sn;
	unsigned char *ddata = dst->samples;
	signed char map[FZ_MAX_COLORS];
	int x, y, i, j, k;
	unsigned char mapped[FZ_MAX_COLORS];
	int unmapped = sseps_n;

	assert(da == sa);
	assert(ss == fz_count_active_separations(ctx, sseps));
	assert(ds == fz_count_active_separations(ctx, dseps));

	dstride -= dn * dw;
	sstride -= sn * dw;

	/* Process colorants first */
	if (dst->colorspace == src->colorspace)
	{
		/* Simple copy */
		unsigned char *dd = ddata;
		const unsigned char *sd = sdata;
		for (y = dh; y > 0; y--)
		{
			for (x = dw; x > 0; x--)
			{
				for (i = 0; i < dn; i++)
					dd[i] = sd[i];
				dd += dn;
				sd += sn;
			}
			dd += dstride;
			sd += sstride;
		}
	}
	else
	{
		fz_pixmap_converter *pc = fz_lookup_pixmap_converter(ctx, dst->colorspace, src->colorspace);

		pc(ctx, dst, src, prf, default_cs, NULL, 0);
	}

	/* Make a map of what spots go where */
	for (i = 0, k = 0; i < dseps_n; i++)
	{
		const char *name;

		if (sep_state(dseps, i) >= FZ_SEPARATION_DISABLED)
			continue;
		name = dseps->name[i];
		map[k] = -1;
		mapped[k] = 0;
		for (j = 0; j < sseps_n; j++)
		{
			if (sep_state(sseps, j) >= FZ_SEPARATION_DISABLED)
				continue;
			if (!strcmp(name, sseps->name[j]))
			{
				map[k] = j;
				unmapped--;
				mapped[k] = 1;
				break;
			}
		}
		k++;
	}
	if (sa)
		map[k] = sseps_n;

	/* Now we need to make d[i] = map[i] < 0 : 255 ? s[map[i]] */

	{
		unsigned char *dd = ddata + dc;
		const unsigned char *sd = sdata + sc;
		for (y = dh; y > 0; y--)
		{
			for (x = dw; x > 0; x--)
			{
				for (i = 0; i < ds; i++)
					dd[i] = map[i] < 0 ? 255 : sd[map[i]];
				dd += dn;
				sd += sn;
			}
			dd += dstride;
			sd += sstride;
		}
	}

	/* If we've handled all the spots, we're done. */
	if (unmapped == 0)
		return dst;

	/* Still need to handle mapping 'lost' spots down to process colors */
	for (i = 0; i < sseps_n; i++)
	{
		uint8_t convert[4];
		uint32_t c;

		if (mapped[i])
			continue;
		/* Src spot i is not mapped. We need to convert that down. */
		switch (dc)
		{
		case 1: /* Grey */
			/* FIXME: Should we hold a grey equivalent in each spot? */
			c = sseps->equiv_rgb[i];
			convert[0] = ((c & 0xff) * 77 + ((c>>8) & 0xff) * 150 + ((c>>16) & 0xff) * 28 + 255)>>8;
			break;
		case 3: /* RGB */
			c = sseps->equiv_rgb[i];
			convert[0] = c;
			convert[1] = c>>8;
			convert[2] = c>>16;
			break;
		case 4: /* CMYK */
			c = sseps->equiv_cmyk[i];
			convert[0] = c;
			convert[1] = c>>8;
			convert[2] = c>>16;
			convert[3] = c>>24;
			break;
		}

		{
			unsigned char *dd = ddata;
			const unsigned char *sd = sdata + sc;
			for (y = dh; y > 0; y--)
			{
				for (x = dw; x > 0; x--)
				{
					unsigned char  v = sd[i];
					if (v == 0)
						continue;
					for (i = 0; i < dc; i++)
						dd[i] = fz_clampi(dd[i] + fz_mul255(v, convert[i]), 0, 255);
					dd += dn;
					sd += sn;
				}
				dd += dstride;
				sd += sstride;
			}
		}
	}

	return dst;
}

void fz_convert_separation_colors(fz_context *ctx, const fz_color_params *color_params, const fz_colorspace *dst_cs, const fz_separations *dst_seps, float *dst_color, const fz_colorspace *src_cs, const float *src_color)
{
	int i, j, n, dc, ds, dn, pred;
	float remainders[FZ_MAX_COLORS];
	int remaining = 0;

	assert(dst_cs && dst_seps && src_cs && dst_color && src_color);
	assert(fz_colorspace_is_device_n(ctx, src_cs));

	dc = fz_colorspace_n(ctx, dst_cs);
	ds = dst_seps->num_separations;
	dn = dc + ds;

	i = 0;
	if (!fz_colorspace_is_subtractive(ctx, dst_cs))
		for (; i < dc; i++)
			dst_color[i] = 1;
	for (; i < dn; i++)
		dst_color[i] = 0;

	n = fz_colorspace_n(ctx, src_cs);
	pred = 0;
	for (i = 0; i < n; i++)
	{
		const char *name = fz_colorspace_colorant(ctx, src_cs, i);

		if (i == 0 && !strcmp(name, "All"))
		{
			/* This is only supposed to happen in separation spaces, not DeviceN */
			if (n != 1)
				fz_warn(ctx, "All found in DeviceN space");
			for (i = 0; i < dn; i++)
				dst_color[i] = src_color[0];
			break;
		}
		if (!strcmp(name, "None"))
			continue;

		/* The most common case is that the colorant we match is the
		 * one after the one we matched before, so optimise for that. */
		for (j = pred; j < ds; j++)
		{
			const char *dname = dst_seps->name[j];
			if (!strcmp(name, dname))
				goto found_sep;
		}
		for (j = 0; j < pred; j++)
		{
			const char *dname = dst_seps->name[j];
			if (!strcmp(name, dname))
				goto found_sep;
		}
		for (j = 0; j < dc; j++)
		{
			const char *dname = fz_colorspace_colorant(ctx, dst_cs, j);
			if (!strcmp(name, dname))
				goto found_process;
		}
		if (0) {
found_sep:
			dst_color[j+dc] = src_color[i];
			pred = j+1;
		}
		else if (0)
		{
found_process:
			dst_color[j] += src_color[i];
		}
		else
		{
			if (remaining == 0)
			{
				memset(remainders, 0, sizeof(float) * n);
				remaining = 1;
			}
			remainders[i] = src_color[i];
		}
	}

	if (remaining)
	{
		/* There were some spots that didn't copy over */
		float converted[FZ_MAX_COLORS];
		fz_convert_color(ctx, color_params, NULL, dst_cs, converted, src_cs, remainders);

		for (i = 0; i < dc; i++)
			dst_color[i] += converted[i];
	}
}