summaryrefslogtreecommitdiff
path: root/source/fitz/load-jxr.c
blob: f7a60f9ffa7eb34515f5dcc165b99857c7be1ddf (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
#include "mupdf/fitz.h"

#ifdef HAVE_JPEGXR

#include <jpegxr.h>

struct info
{
	fz_context *ctx;

	float xres, yres;
	int width, height;
	int format;
	int has_alpha;
	int has_premul;

	int comps, stride;
	unsigned char *samples;
	fz_colorspace *cspace;
};

static const char *
jxr_error_string(int rc)
{
	switch (rc)
	{
	case JXR_EC_OK: return "No error";
	default:
	case JXR_EC_ERROR: return "Unspecified error";
	case JXR_EC_BADMAGIC: return "Stream lacks proper magic number";
	case JXR_EC_FEATURE_NOT_IMPLEMENTED: return "Feature not implemented";
	case JXR_EC_IO: return "Error reading/writing data";
	case JXR_EC_BADFORMAT: return "Bad file format";
	}
}

struct {
	jxrc_t_pixelFormat format;
	int comps;
} pixelformats[] = {
	{JXRC_FMT_BlackWhite, 1},
	{JXRC_FMT_8bppGray, 1},
	{JXRC_FMT_16bppGray, 1},
	{JXRC_FMT_16bppGrayFixedPoint, 1},
	{JXRC_FMT_16bppGrayHalf, 1},
	{JXRC_FMT_32bppGrayFixedPoint, 1},
	{JXRC_FMT_32bppGrayFloat, 1},
	{JXRC_FMT_16bppBGR555, 3},
	{JXRC_FMT_16bppBGR565, 3},
	{JXRC_FMT_24bppBGR, 3},
	{JXRC_FMT_24bppRGB, 3},
	{JXRC_FMT_32bppBGR101010, 3},
	{JXRC_FMT_32bppBGRA, 3},
	{JXRC_FMT_32bppBGR, 3},
	{JXRC_FMT_32bppPBGRA, 3},
	{JXRC_FMT_48bppRGBFixedPoint, 3},
	{JXRC_FMT_48bppRGBHalf, 3},
	{JXRC_FMT_48bppRGB, 3},
	{JXRC_FMT_64bppPRGBA, 3},
	{JXRC_FMT_64bppRGBAFixedPoint, 3},
	{JXRC_FMT_64bppRGBAHalf, 3},
	{JXRC_FMT_64bppRGBA, 3},
	{JXRC_FMT_64bppRGBFixedPoint, 3},
	{JXRC_FMT_64bppRGBHalf, 3},
	{JXRC_FMT_96bppRGBFixedPoint, 3},
	{JXRC_FMT_128bppPRGBAFloat, 3},
	{JXRC_FMT_128bppRGBAFixedPoint, 3},
	{JXRC_FMT_128bppRGBAFloat, 3},
	{JXRC_FMT_128bppRGBFixedPoint, 3},
	{JXRC_FMT_128bppRGBFloat, 3},
	{JXRC_FMT_32bppRGBE, 3},
	{JXRC_FMT_32bppCMYK, 4},
	{JXRC_FMT_40bppCMYKAlpha, 4},
	{JXRC_FMT_64bppCMYK, 4},
	{JXRC_FMT_80bppCMYKAlpha, 4},
	{JXRC_FMT_24bpp3Channels, 3},
	{JXRC_FMT_32bpp3ChannelsAlpha, 3},
	{JXRC_FMT_32bpp4Channels, 4},
	{JXRC_FMT_40bpp4ChannelsAlpha, 4},
	{JXRC_FMT_40bpp5Channels, 5},
	{JXRC_FMT_48bpp3Channels, 3},
	{JXRC_FMT_48bpp5ChannelsAlpha, 5},
	{JXRC_FMT_48bpp6Channels, 6},
	{JXRC_FMT_56bpp6ChannelsAlpha, 6},
	{JXRC_FMT_56bpp7Channels, 7},
	{JXRC_FMT_64bpp3ChannelsAlpha, 3},
	{JXRC_FMT_64bpp4Channels, 4},
	{JXRC_FMT_64bpp7ChannelsAlpha, 7},
	{JXRC_FMT_64bpp8Channels, 8},
	{JXRC_FMT_72bpp8ChannelsAlpha, 8},
	{JXRC_FMT_80bpp4ChannelsAlpha, 4},
	{JXRC_FMT_80bpp5Channels, 5},
	{JXRC_FMT_96bpp5ChannelsAlpha, 5},
	{JXRC_FMT_96bpp6Channels, 6},
	{JXRC_FMT_112bpp6ChannelsAlpha, 6},
	{JXRC_FMT_112bpp7Channels, 7},
	{JXRC_FMT_128bpp7ChannelsAlpha, 7},
	{JXRC_FMT_128bpp8Channels, 8},
	{JXRC_FMT_144bpp8ChannelsAlpha, 8},
};

static inline float
float32_from_int32_bits(int v)
{
	return *((float*) &v);
}

static inline float
float32_from_float16(int v)
{
	int s = (v >> 15) & 0x1;
	int e = (v >> 10) & 0x1f;
	int m = (v >> 0) & 0x3ff;
	int i = (s << 31) | ((e - 15 + 127) << 23) | (m << 13);
	return float32_from_int32_bits(i);
}

static inline float
sRGB_from_scRGB(float v)
{
	if (v <= 0.0031308f)
		return v * 12.92f;
	return 1.055f * powf(v, 1.0f / 2.4f) - 0.055f;
}

static inline void
jxr_unpack_sample(fz_context *ctx, struct info *info, jxr_image_t image, int *sp, unsigned char *dp)
{
	int k, bpc, comps, alpha;
	float v;

	if (info->format == JXRC_FMT_32bppRGBE)
	{
		dp[0] = sRGB_from_scRGB(ldexpf(sp[0], sp[3] - 128 - 8)) * 255 + 0.5f;
		dp[1] = sRGB_from_scRGB(ldexpf(sp[1], sp[3] - 128 - 8)) * 255 + 0.5f;
		dp[2] = sRGB_from_scRGB(ldexpf(sp[2], sp[3] - 128 - 8)) * 255 + 0.5f;
		return;
	}
	if (info->format == JXRC_FMT_16bppBGR565)
	{
		dp[0] = sp[0] << 3;
		dp[1] = sp[1] << 2;
		dp[2] = sp[2] << 3;
		return;
	}

	comps = fz_mini(fz_colorspace_n(ctx, info->cspace), jxr_get_IMAGE_CHANNELS(image));
	alpha = jxr_get_ALPHACHANNEL_FLAG(image);
	bpc = jxr_get_CONTAINER_BPC(image);

	for (k = 0; k < comps + alpha; k++)
	{
		switch (bpc)
		{
		default: fz_throw(ctx, FZ_ERROR_GENERIC, "unknown sample type: %d", bpc);
		case JXR_BD1WHITE1: dp[k] = sp[k] ? 255 : 0; break;
		case JXR_BD1BLACK1: dp[k] = sp[k] ? 0 : 255; break;
		case JXR_BD5: dp[k] = sp[k] << 3; break;
		case JXR_BD8: dp[k] = sp[k]; break;
		case JXR_BD10: dp[k] = sp[k] >> 2; break;
		case JXR_BD16: dp[k] = sp[k] >> 8; break;

		case JXR_BD16S:
			v = sp[k] * (1.0f / (1 << 13));
			goto decode_float32;
		case JXR_BD32S:
			v = sp[k] * (1.0f / (1 << 24));
			goto decode_float32;
		case JXR_BD16F:
			v = float32_from_float16(sp[k]);
			goto decode_float32;
		case JXR_BD32F:
			v = float32_from_int32_bits(sp[k]);
			goto decode_float32;
		decode_float32:
			if (k < comps)
				dp[k] = sRGB_from_scRGB(fz_clamp(v, 0, 1)) * 255 + 0.5f;
			else
				dp[k] = fz_clamp(v, 0, 1) * 255 + 0.5f;
			break;
		}
	}
}

static inline void
jxr_unpack_alpha_sample(fz_context *ctx, struct info *info, jxr_image_t image, int *sp, unsigned char *dp)
{
	int bpc = jxr_get_CONTAINER_BPC(image);
	switch (bpc)
	{
	default: fz_throw(ctx, FZ_ERROR_GENERIC, "unknown alpha sample type: %d", bpc);
	case JXR_BD8: dp[0] = sp[0]; break;
	case JXR_BD10: dp[0] = sp[0] >> 2; break;
	case JXR_BD16: dp[0] = sp[0] >> 8; break;

	case JXR_BD16S:
		dp[0] = fz_clamp(sp[0] * (1.0f / (1 << 13)), 0, 1) * 255 + 0.5f;
		break;
	case JXR_BD32S:
		dp[0] = fz_clamp(sp[0] * (1.0f / (1 << 24)), 0, 1) * 255 + 0.5f;
		break;
	case JXR_BD16F:
		dp[0] = fz_clamp(float32_from_float16(sp[0]), 0, 1) * 255 + 0.5f;
		break;
	case JXR_BD32F:
		dp[0] = fz_clamp(float32_from_int32_bits(sp[0]), 0, 1) * 255 + 0.5f;
		break;
	}
}

static void
jxr_decode_block(jxr_image_t image, int mx, int my, int *data)
{
	struct info *info = jxr_get_user_data(image);
	fz_context *ctx = info->ctx;
	unsigned char *p;
	int x, y, n1;

	mx *= 16;
	my *= 16;

	n1 = fz_colorspace_n(ctx, info->cspace) + 1;
	for (y = 0; y < 16; y++)
	{
		if ((my + y) >= info->height)
			return;

		p = info->samples + (my + y) * info->stride + mx * n1;

		for (x = 0; x < 16; x++)
		{
			if ((mx + x) < info->width)
			{
				jxr_unpack_sample(ctx, info, image, data, p);
				p += n1;
			}

			data += jxr_get_IMAGE_CHANNELS(image) + jxr_get_ALPHACHANNEL_FLAG(image);
			data += (info->format == JXRC_FMT_32bppRGBE ? 1 : 0);
		}
	}
}

static void
jxr_decode_block_alpha(jxr_image_t image, int mx, int my, int *data)
{
	struct info *info = jxr_get_user_data(image);
	fz_context *ctx = info->ctx;
	unsigned char *p;
	int x, y, n;

	mx *= 16;
	my *= 16;

	n = fz_colorspace_n(ctx, info->cspace);
	for (y = 0; y < 16; y++)
	{
		if ((my + y) >= info->height)
			return;

		p = info->samples + (my + y) * info->stride + mx * (n + 1);

		for (x = 0; x < 16; x++)
		{
			if ((mx + x) < info->width)
			{
				jxr_unpack_alpha_sample(ctx, info, image, data, p + n);
				p += n + 1;
			}

			data++;
		}
	}
}

static void
jxr_read_image(fz_context *ctx, unsigned char *data, int size, struct info *info, int only_metadata)
{
	jxr_container_t container;
	jxr_image_t image = NULL;
	jxr_image_t alpha = NULL;
	int rc, i;

	fz_try(ctx)
	{
		container = jxr_create_container();

		rc = jxr_read_image_container_memory(container, data, size);
		if (rc < 0)
			fz_throw(ctx, FZ_ERROR_GENERIC, "cannot read jxr image container: %s", jxr_error_string(rc));

		info->xres = jxrc_width_resolution(container, 0);
		info->yres = jxrc_height_resolution(container, 0);
		info->width = jxrc_image_width(container, 0);
		info->height = jxrc_image_height(container, 0);

		info->format = jxrc_image_pixelformat(container, 0);

		for (i = 0; i < nelem(pixelformats); i++)
			if (pixelformats[i].format == info->format)
			{
				info->comps = pixelformats[i].comps;
				break;
			}
		if (i == nelem(pixelformats))
			fz_throw(ctx, FZ_ERROR_GENERIC, "unsupported pixel format: %u", info->format);

		if (info->comps == 1)
			info->cspace = fz_device_gray(ctx);
		else if (info->comps == 3)
			info->cspace = fz_device_rgb(ctx);
		else if (info->comps >= 4)
			info->cspace = fz_device_cmyk(ctx);

		info->stride = info->width * (fz_colorspace_n(ctx, info->cspace) + 1);

		if (!only_metadata)
		{
			unsigned long image_offset;
			unsigned char image_band;
			unsigned long alpha_offset;
			unsigned char alpha_band;

			info->ctx = ctx;
			info->samples = fz_malloc(ctx, info->stride * info->height);
			memset(info->samples, 0xff, info->stride * info->height);

			image_offset = jxrc_image_offset(container, 0);
			image_band = jxrc_image_band_presence(container, 0);
			alpha_offset = jxrc_alpha_offset(container, 0);
			alpha_band = jxrc_alpha_band_presence(container, 0);

			image = jxr_create_input();

			jxr_set_PROFILE_IDC(image, 111);
			jxr_set_LEVEL_IDC(image, 255);
			jxr_set_pixel_format(image, info->format);
			jxr_set_container_parameters(image, info->format,
				info->width, info->height, alpha_offset,
				image_band, alpha_band, 0);

			jxr_set_user_data(image, info);
			jxr_set_block_output(image, jxr_decode_block);

			rc = jxr_read_image_bitstream_memory(image, data + image_offset, size - image_offset);
			if (rc < 0)
				fz_throw(ctx, FZ_ERROR_GENERIC, "cannot read jxr image: %s", jxr_error_string(rc));

			if (info->format == JXRC_FMT_32bppPBGRA ||
					info->format == JXRC_FMT_64bppPRGBA ||
					info->format == JXRC_FMT_128bppPRGBAFloat)
				info->has_premul = 1;

			if (jxr_get_ALPHACHANNEL_FLAG(image))
				info->has_alpha = 1;

			if (alpha_offset > 0)
			{
				info->has_alpha = 1;

				alpha = jxr_create_input();

				jxr_set_PROFILE_IDC(alpha, 111);
				jxr_set_LEVEL_IDC(alpha, 255);
				jxr_set_pixel_format(alpha, info->format);
				jxr_set_container_parameters(alpha, info->format,
					info->width, info->height, alpha_offset,
					image_band, alpha_band, 1);

				jxr_set_user_data(alpha, info);
				jxr_set_block_output(alpha, jxr_decode_block_alpha);

				rc = jxr_read_image_bitstream_memory(alpha, data + alpha_offset, size - alpha_offset);
				if (rc < 0)
					fz_throw(ctx, FZ_ERROR_GENERIC, "cannot read jxr image: %s", jxr_error_string(rc));
			}
		}
	}
	fz_always(ctx)
	{
		if (alpha)
			jxr_destroy(alpha);
		if (image)
			jxr_destroy(image);
		jxr_destroy_container(container);
	}
	fz_catch(ctx)
	{
		fz_rethrow(ctx);
	}
}

fz_pixmap *
fz_load_jxr(fz_context *ctx, unsigned char *data, size_t size)
{
	struct info info = { 0 };
	fz_pixmap *image = NULL;

	fz_var(image);

	jxr_read_image(ctx, data, size, &info, 0);

	image = fz_new_pixmap(ctx, info.cspace, info.width, info.height, 1);

	image->xres = info.xres;
	image->yres = info.yres;

	fz_try(ctx)
	{
		fz_unpack_tile(ctx, image, info.samples, fz_colorspace_n(ctx, info.cspace) + 1, 8, info.stride, 0);
		if (info.has_alpha && !info.has_premul)
			fz_premultiply_pixmap(ctx, image);
	}
	fz_always(ctx)
	{
		fz_free(ctx, info.samples);
		fz_drop_colorspace(ctx, info.cspace);
	}
	fz_catch(ctx)
	{
		fz_drop_pixmap(ctx, image);
		fz_rethrow(ctx);
	}

	return image;
}

void
fz_load_jxr_info(fz_context *ctx, unsigned char *data, size_t size, int *wp, int *hp, int *xresp, int *yresp, fz_colorspace **cspacep)
{
	struct info info = { 0 };

	jxr_read_image(ctx, data, size, &info, 1);

	*xresp = info.xres;
	*yresp = info.yres;
	*wp = info.width;
	*hp = info.height;
	*cspacep = info.cspace;
}
#else /* HAVE_JPEGXR */

fz_pixmap *
fz_load_jxr(fz_context *ctx, unsigned char *data, size_t size)
{
	fz_throw(ctx, FZ_ERROR_GENERIC, "JPEG-XR codec is not available");
}

void
fz_load_jxr_info(fz_context *ctx, unsigned char *data, size_t size, int *wp, int *hp, int *xresp, int *yresp, fz_colorspace **cspacep)
{
	fz_throw(ctx, FZ_ERROR_GENERIC, "JPEG-XR codec is not available");
}

#endif /* HAVE_JPEGXR */