summaryrefslogtreecommitdiff
path: root/source/fitz/color-lcms.c
blob: 604573cb32b0ca2a184c2033d2229676b2b3afcd (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
#include "mupdf/fitz.h"
#include "lcms2art.h"
#include "lcms2art_plugin.h"
#include "colorspace-imp.h"

#define LCMS_BYTES_MASK 0x7
/* #define DEBUG_LCMS_MEM(A) do { printf A; fflush(stdout); } while (0) */
#define DEBUG_LCMS_MEM(A) do { } while (0)

static void
fz_lcms_log_error(cmsContext id, cmsUInt32Number error_code, const char *error_text)
{
	fz_context *ctx = (fz_context *)cmsGetContextUserData(id);
	fz_warn(ctx, "lcms error: %s", error_text);
}

static void
*fz_lcms_malloc(cmsContext id, unsigned int size)
{
	void *result;
	fz_context *ctx = (fz_context *)cmsGetContextUserData(id);
	result = fz_malloc_no_throw(ctx, size);
	DEBUG_LCMS_MEM(("Allocation::  mupdf ctx = %p lcms ctx = %p allocation = %p \n", (void*) ctx, (void*) id, (void*) result));
	return result;
}

static void
fz_lcms_free(cmsContext id, void *ptr)
{
	fz_context *ctx = (fz_context *)cmsGetContextUserData(id);
	DEBUG_LCMS_MEM(("Free:: mupdf ctx = %p lcms ctx = %p allocation = %p \n", (void*) ctx, (void*) id, (void*) ptr));
	fz_free(ctx, ptr);
}

static void*
fz_lcms_realloc(cmsContext id, void *ptr, unsigned int size)
{
	fz_context *ctx = (fz_context *)cmsGetContextUserData(id);
	DEBUG_LCMS_MEM(("Realloc:: mupdf ctx = %p lcms ctx = %p allocation = %p \n", (void*) ctx, (void*) id, (void*) ptr));
	if (ptr == 0)
		return fz_lcms_malloc(id, size);
	if (size == 0)
	{
		fz_lcms_free(id, ptr);
		return NULL;
	}
	return fz_resize_array_no_throw(ctx, ptr, size, 1);
}

static cmsPluginMemHandler fz_lcms_memhandler =
{
	{
		cmsPluginMagicNumber,
		LCMS_VERSION,
		cmsPluginMemHandlerSig,
		NULL
	},
	fz_lcms_malloc,
	fz_lcms_free,
	fz_lcms_realloc,
	NULL,
	NULL,
	NULL,
};

static int
fz_lcms_num_devcomps(cmsContext cmm_ctx, fz_iccprofile *profile)
{
	return cmsChannelsOf(cmm_ctx, cmsGetColorSpace(cmm_ctx, profile->cmm_handle));
}

static void
fz_lcms_premultiply_row(fz_context *ctx, int n, int c, int w, unsigned char *s)
{
	unsigned char a;
	int k;
	int n1 = n-1;

	for (; w > 0; w--)
	{
		a = s[n1];
		for (k = 0; k < c; k++)
			s[k] = fz_mul255(s[k], a);
		s += n;
	}
}

static void
fz_lcms_unmultiply_row(fz_context *ctx, int n, int c, int w, unsigned char *s, const unsigned char *in)
{
	int a, inva;
	int k;
	int n1 = n-1;

	for (; w > 0; w--)
	{
		a = in[n1];
		inva = a ? 255 * 256 / a : 0;
		for (k = 0; k < c; k++)
			s[k] = (in[k] * inva) >> 8;
		for (;k < n1; k++)
			s[k] = in[k];
		s[n1] = a;
		s += n;
		in += n;
	}
}

/* Transform pixmap */
void
fz_lcms_transform_pixmap(fz_cmm_instance *instance, fz_icclink *link, fz_pixmap *dst, fz_pixmap *src)
{
	cmsContext cmm_ctx = (cmsContext)instance;
	fz_context *ctx = (fz_context *)cmsGetContextUserData(cmm_ctx);
	cmsHTRANSFORM hTransform = (cmsHTRANSFORM)link->cmm_handle;
	int cmm_num_src, cmm_num_des, cmm_extras;
	unsigned char *inputpos, *outputpos, *buffer;
	int ss = src->stride;
	int ds = dst->stride;
	int sw = src->w;
	int dw = dst->w;
	int sn = src->n;
	int dn = dst->n;
	int sa = src->alpha;
	int da = dst->alpha;
	int ssp = src->s;
	int dsp = dst->s;
	int sc = sn - ssp - sa;
	int dc = dn - dsp - da;
	int h = src->h;
	cmsUInt32Number src_format, dst_format;
	DEBUG_LCMS_MEM(("@@@@@@@ Transform Pixmap Start:: mupdf ctx = %p lcms ctx = %p link = %p \n", (void*)ctx, (void*)cmm_ctx, (void*)link->cmm_handle));

	/* check the channels. */
	src_format = cmsGetTransformInputFormat(cmm_ctx, hTransform);
	dst_format = cmsGetTransformOutputFormat(cmm_ctx, hTransform);
	cmm_num_src = T_CHANNELS(src_format);
	cmm_num_des = T_CHANNELS(dst_format);
	cmm_extras = T_EXTRA(src_format);
	if (cmm_num_src != sc || cmm_num_des != dc || cmm_extras != ssp+sa || sa != da || (link->copy_spots && ssp != dsp))
		fz_throw(ctx, FZ_ERROR_GENERIC, "Mismatching color setup in cmm pixmap transformation: src: %d vs %d+%d+%d, dst: %d vs %d+%d+%d", cmm_num_src, sc, ssp, sa, cmm_num_des, dc, dsp, da);

	/* Transform */
	inputpos = src->samples;
	outputpos = dst->samples;
	if (sa)
	{
		/* Allow for premultiplied alpha */
		buffer = fz_malloc(ctx, ss);
		for (; h > 0; h--)
		{
			fz_lcms_unmultiply_row(ctx, sn, sc, sw, buffer, inputpos);
			cmsDoTransform(cmm_ctx, hTransform, buffer, outputpos, sw);
			fz_lcms_premultiply_row(ctx, dn, dc, dw, outputpos);
			inputpos += ss;
			outputpos += ds;
		}
		fz_free(ctx, buffer);
	}
	else
	{
		for (; h > 0; h--)
		{
			cmsDoTransform(cmm_ctx, hTransform, inputpos, outputpos, sw);
			inputpos += ss;
			outputpos += ds;
		}
	}
	DEBUG_LCMS_MEM(("@@@@@@@ Transform Pixmap End:: mupdf ctx = %p lcms ctx = %p link = %p \n", (void*)ctx, (void*)cmm_ctx, (void*)link->cmm_handle));
}

/* Transform a single color. */
void
fz_lcms_transform_color(fz_cmm_instance *instance, fz_icclink *link, unsigned short *dst, const unsigned short *src)
{
	cmsContext cmm_ctx = (cmsContext)instance;
	cmsHTRANSFORM hTransform = (cmsHTRANSFORM) link->cmm_handle;

	cmsDoTransform(cmm_ctx, hTransform, src, dst, 1);
}

void
fz_lcms_init_link(fz_cmm_instance *instance, fz_icclink *link, const fz_iccprofile *dst, int dst_extras, const fz_iccprofile *src, int src_extras, const fz_iccprofile *prf, const fz_color_params *rend, int cmm_flags, int num_bytes, int copy_spots)
{
	cmsContext cmm_ctx = (cmsContext)instance;
	fz_context *ctx = (fz_context *)cmsGetContextUserData(cmm_ctx);

	cmsUInt32Number src_data_type, des_data_type;
	cmsColorSpaceSignature src_cs, des_cs;
	int src_num_chan, des_num_chan;
	int lcms_src_cs, lcms_des_cs;
	unsigned int flag = cmsFLAGS_LOWRESPRECALC | cmm_flags;

	DEBUG_LCMS_MEM(("@@@@@@@ Create Link Start:: mupdf ctx = %p lcms ctx = %p src = %p des = %p \n", (void*)ctx, (void*)cmm_ctx, (void*)src->cmm_handle, (void*)dst->cmm_handle));

	/* src */
	src_cs = cmsGetColorSpace(cmm_ctx, src->cmm_handle);
	lcms_src_cs = _cmsLCMScolorSpace(cmm_ctx, src_cs);
	if (lcms_src_cs < 0)
		lcms_src_cs = 0;
	src_num_chan = cmsChannelsOf(cmm_ctx, src_cs);
	src_data_type = (COLORSPACE_SH(lcms_src_cs) | CHANNELS_SH(src_num_chan) | DOSWAP_SH(src->bgr) | SWAPFIRST_SH(src->bgr && (src_extras != 0)) | BYTES_SH(num_bytes) | EXTRA_SH(src_extras));

	/* dst */
	des_cs = cmsGetColorSpace(cmm_ctx, dst->cmm_handle);
	lcms_des_cs = _cmsLCMScolorSpace(cmm_ctx, des_cs);
	if (lcms_des_cs < 0)
		lcms_des_cs = 0;
	des_num_chan = cmsChannelsOf(cmm_ctx, des_cs);
	des_data_type = (COLORSPACE_SH(lcms_des_cs) | CHANNELS_SH(des_num_chan) | DOSWAP_SH(dst->bgr) | SWAPFIRST_SH(dst->bgr && (dst_extras != 0)) | BYTES_SH(num_bytes) | EXTRA_SH(dst_extras));

	/* flags */
	if (rend->bp)
		flag |= cmsFLAGS_BLACKPOINTCOMPENSATION;

	if (copy_spots)
		flag |= cmsFLAGS_COPY_ALPHA;

	link->depth = num_bytes;
	link->src_extras = src_extras;
	link->dst_extras = dst_extras;
	link->copy_spots = copy_spots;

	if (prf == NULL)
	{
		link->cmm_handle = cmsCreateTransformTHR(cmm_ctx, src->cmm_handle, src_data_type, dst->cmm_handle, des_data_type, rend->ri, flag);
		if (!link->cmm_handle)
			fz_throw(ctx, FZ_ERROR_GENERIC, "cmsCreateTransform failed");
	}
	else
	{
		/* littleCMS proof creation links don't work properly with the Ghent
		 * test files. Handle this in a brutish manner.
		 */
		if (src == prf)
		{
			link->cmm_handle = cmsCreateTransformTHR(cmm_ctx, src->cmm_handle, src_data_type, dst->cmm_handle, des_data_type, INTENT_RELATIVE_COLORIMETRIC, flag);
			if (!link->cmm_handle)
				fz_throw(ctx, FZ_ERROR_GENERIC, "cmsCreateTransform failed");
		}
		else if (prf == dst)
		{
			link->cmm_handle = cmsCreateTransformTHR(cmm_ctx, src->cmm_handle, src_data_type, prf->cmm_handle, des_data_type, rend->ri, flag);
			if (!link->cmm_handle)
				fz_throw(ctx, FZ_ERROR_GENERIC, "cmsCreateTransform failed");
		}
		else
		{
			cmsHPROFILE src_to_prf_profile;
			cmsHTRANSFORM src_to_prf_link;
			cmsColorSpaceSignature prf_cs;
			int prf_num_chan;
			int lcms_prf_cs;
			cmsUInt32Number prf_data_type;
			cmsHPROFILE hProfiles[3];

			prf_cs = cmsGetColorSpace(cmm_ctx, prf->cmm_handle);
			lcms_prf_cs = _cmsLCMScolorSpace(cmm_ctx, prf_cs);
			if (lcms_prf_cs < 0)
				lcms_prf_cs = 0;
			prf_num_chan = cmsChannelsOf(cmm_ctx, prf_cs);
			prf_data_type = (COLORSPACE_SH(lcms_prf_cs) | CHANNELS_SH(prf_num_chan) | BYTES_SH(num_bytes));
			src_to_prf_link = cmsCreateTransformTHR(cmm_ctx, src->cmm_handle, src_data_type, prf->cmm_handle, prf_data_type, rend->ri, flag);
			if (!src_to_prf_link)
				fz_throw(ctx, FZ_ERROR_GENERIC, "cmsCreateTransform failed");
			src_to_prf_profile = cmsTransform2DeviceLink(cmm_ctx, src_to_prf_link, 3.4, flag);
			cmsDeleteTransform(cmm_ctx, src_to_prf_link);
			if (!src_to_prf_profile)
				fz_throw(ctx, FZ_ERROR_GENERIC, "cmsTransform2DeviceLink failed");

			hProfiles[0] = src_to_prf_profile;
			hProfiles[1] = prf->cmm_handle;
			hProfiles[2] = dst->cmm_handle;
			link->cmm_handle = cmsCreateMultiprofileTransformTHR(cmm_ctx, hProfiles, 3, src_data_type, des_data_type, INTENT_RELATIVE_COLORIMETRIC, flag);
			cmsCloseProfile(cmm_ctx, src_to_prf_profile);
			if (!link->cmm_handle)
				fz_throw(ctx, FZ_ERROR_GENERIC, "cmsCreateMultiprofileTransform failed");
		}
	}

	DEBUG_LCMS_MEM(("@@@@@@@ Create Link End:: mupdf ctx = %p lcms ctx = %p link = %p link_cmm = %p src = %p des = %p \n", (void*)ctx, (void*)cmm_ctx, (void*)link, (void*)link->cmm_handle, (void*)src->cmm_handle, (void*)dst->cmm_handle));
}

void
fz_lcms_fin_link(fz_cmm_instance *instance, fz_icclink *link)
{
	cmsContext cmm_ctx = (cmsContext)instance;
	DEBUG_LCMS_MEM(("Free Link:: link = %p \n", (void*)link->cmm_handle));
	if (link->cmm_handle != NULL)
		cmsDeleteTransform(cmm_ctx, link->cmm_handle);
	link->cmm_handle = NULL;
}

static fz_cmm_instance *
fz_lcms_new_instance(fz_context *ctx)
{
	cmsContext cmm_ctx;

	cmm_ctx = cmsCreateContext(&fz_lcms_memhandler, ctx);
	DEBUG_LCMS_MEM(("Context Creation:: mupdf ctx = %p lcms ctx = %p \n", (void*) ctx, (void*) cmm_ctx));
	if (cmm_ctx == NULL)
		fz_throw(ctx, FZ_ERROR_GENERIC, "cmsCreateContext failed");
	cmsSetLogErrorHandlerTHR(cmm_ctx, fz_lcms_log_error);
	return (fz_cmm_instance *)cmm_ctx;
}

static void
fz_lcms_drop_instance(fz_cmm_instance *instance)
{
	DEBUG_LCMS_MEM(("Context Destruction:: lcms ctx = %p \n", (void*)instance));
	if (instance == NULL)
		return;
	cmsDeleteContext((cmsContext)instance);
}

static void
fz_lcms_init_profile(fz_cmm_instance *instance, fz_iccprofile *profile)
{
	cmsContext cmm_ctx = (cmsContext)instance;
	fz_context *ctx = (fz_context *)cmsGetContextUserData(cmm_ctx);
	size_t size;
	unsigned char *data;

	DEBUG_LCMS_MEM(("@@@@@@@ Create Profile Start:: mupdf ctx = %p lcms ctx = %p \n", (void*)ctx, (void*)cmm_ctx));

	size = fz_buffer_storage(ctx, profile->buffer, &data);
	profile->cmm_handle = cmsOpenProfileFromMemTHR(cmm_ctx, data, (cmsUInt32Number)size);
	if (profile->cmm_handle == NULL)
	{
		profile->num_devcomp = 0;
		fz_throw(ctx, FZ_ERROR_GENERIC, "cmsOpenProfileFromMem failed");
	}
	profile->num_devcomp = fz_lcms_num_devcomps(cmm_ctx, profile);

	DEBUG_LCMS_MEM(("@@@@@@@ Create Profile End:: mupdf ctx = %p lcms ctx = %p profile = %p profile_cmm = %p \n", (void*)ctx, (void*)cmm_ctx, (void*)profile, (void*)profile->cmm_handle));
}

static void
fz_lcms_fin_profile(fz_cmm_instance *instance, fz_iccprofile *profile)
{
	cmsContext cmm_ctx = (cmsContext)instance;
	DEBUG_LCMS_MEM(("Free Profile:: profile = %p \n", (void*) profile->cmm_handle));
	if (profile->cmm_handle != NULL)
		cmsCloseProfile(cmm_ctx, profile->cmm_handle);
	profile->cmm_handle = NULL;
}

fz_cmm_engine fz_cmm_engine_lcms = {
	fz_lcms_new_instance,
	fz_lcms_drop_instance,
	fz_lcms_transform_pixmap,
	fz_lcms_transform_color,
	fz_lcms_init_link,
	fz_lcms_fin_link,
	fz_lcms_init_profile,
	fz_lcms_fin_profile,
	cmsFLAGS_NOWHITEONWHITEFIXUP
};