/src/ghostpdl/base/sdcte.c

Source (jump to first uncovered line)
/* Copyright (C) 2001-2025 Artifex Software, Inc.
   All Rights Reserved.

   This software is provided AS-IS with no warranty, either express or
   implied.

   This software is distributed under license and may not be copied,
   modified or distributed except as expressly authorized under the terms
   of the license contained in the file LICENSE in this distribution.

   Refer to licensing information at http://www.artifex.com or contact
   Artifex Software, Inc.,  39 Mesa Street, Suite 108A, San Francisco,
   CA 94129, USA, for further information.
*/


/* DCT encoding filter stream */
#include "memory_.h"
#include "stdio_.h"
#include "jpeglib_.h"
#include "jerror_.h"
#include "gdebug.h"
#include "gsmemory.h"
#include "strimpl.h"
#include "sdct.h"
#include "sjpeg.h"

#define ICC_OVERHEAD  16
#define MAX_MARKER_DATA_SIZE  (65535 - ICC_OVERHEAD)

public_st_jpeg_compress_data();

/* ------ DCTEncode ------ */

/* JPEG destination manager procedures */
static void
dcte_init_destination(j_compress_ptr cinfo)
{
}
static boolean
dcte_empty_output_buffer(j_compress_ptr cinfo)
{
    return FALSE;
}
static void
dcte_term_destination(j_compress_ptr cinfo)
{
}

/* Set the defaults for the DCTEncode filter. */
static void
s_DCTE_set_defaults(stream_state * st)
{
    stream_DCT_state *const ss = (stream_DCT_state *) st;

    s_DCT_set_defaults(st);
    ss->QFactor = 1.0;
    ss->ColorTransform = -1;
    ss->Markers.data = 0;
    ss->Markers.size = 0;
    ss->NoMarker = true;
}

/* Initialize DCTEncode filter */
static int
s_DCTE_init(stream_state * st)
{
    stream_DCT_state *const ss = (stream_DCT_state *) st;
    struct jpeg_destination_mgr *dest = &ss->data.compress->destination;

    dest->init_destination = dcte_init_destination;
    dest->empty_output_buffer = dcte_empty_output_buffer;
    dest->term_destination = dcte_term_destination;
    ss->data.common->memory = ss->jpeg_memory;
    ss->data.compress->cinfo.dest = dest;
    ss->phase = 0;
    ss->icc_marker = 0;
    ss->icc_position = -1;
    return 0;
}

/* Process a buffer */
static int
s_DCTE_process(stream_state * st, stream_cursor_read * pr,
               stream_cursor_write * pw, bool last)
{
    stream_DCT_state *const ss = (stream_DCT_state *) st;
    jpeg_compress_data *jcdp = ss->data.compress;
    struct jpeg_destination_mgr *dest = jcdp->cinfo.dest;

    if_debug2m('w', st->memory, "[wde]process avail=%u, last=%d\n",
               (uint) (pr->limit - pr->ptr), last);
    dest->next_output_byte = pw->ptr + 1;
    dest->free_in_buffer = pw->limit - pw->ptr;
    switch (ss->phase) {
        case 0:   /* not initialized yet */
            if (gs_jpeg_start_compress(ss, TRUE) < 0)
                return ERRC;
            if_debug4m('w', st->memory, "[wde]width=%u, height=%u, components=%d, scan_line_size=%u\n",
                       jcdp->cinfo.image_width,
                       jcdp->cinfo.image_height,
                       jcdp->cinfo.input_components,
                       ss->scan_line_size);
            pw->ptr = dest->next_output_byte - 1;
            ss->phase = 1;
            /* falls through */
        case 1:   /* initialized, Markers not written */
            if (pw->limit - pw->ptr < ss->Markers.size)
                return 1;
            if (ss->Markers.size)
                memcpy(pw->ptr + 1, ss->Markers.data, ss->Markers.size);
            pw->ptr += ss->Markers.size;
            ss->phase = 2;
            /* falls through */
        case 2:   /* still need to write Adobe marker */
            if (!ss->NoMarker) {
                static const byte Adobe[] =
                {
                    0xFF, JPEG_APP0 + 14, 0, 14, /* parameter length */
                    'A', 'd', 'o', 'b', 'e',
                    0, 100, /* Version */
                    0, 0, /* Flags0 */
                    0, 0, /* Flags1 */
                    0   /* ColorTransform */
                };

#define ADOBE_MARKER_LEN sizeof(Adobe)
                if (pw->limit - pw->ptr < ADOBE_MARKER_LEN)
                    return 1;
                memcpy(pw->ptr + 1, Adobe, ADOBE_MARKER_LEN);
                pw->ptr += ADOBE_MARKER_LEN;
                *pw->ptr = ss->ColorTransform;
#undef ADOBE_MARKER_LEN
            }
            dest->next_output_byte = pw->ptr + 1;
            dest->free_in_buffer = pw->limit - pw->ptr;
            ss->phase = 3;
            /* falls through */
        case  3:
            /* If we have it, then write out the ICC profile */
            /* Due to size limitations allowed in APP0 markers, the profile
               may have to be written in mutiple markers */
          if (ss->icc_profile != NULL) {
            static const char marker[2] = {0xFF, 0xE2};  /* JPEG_APP0 + 2 */
                byte num_mark;

                /* Number of markers */
                num_mark = ss->icc_profile->buffer_size / MAX_MARKER_DATA_SIZE;
                if (num_mark * MAX_MARKER_DATA_SIZE < ss->icc_profile->buffer_size) {
                    num_mark++;
                }
            while (ss->icc_marker < num_mark) {
                ulong offset = ss->icc_marker * MAX_MARKER_DATA_SIZE;
                ulong size;

                    size = ss->icc_profile->buffer_size - offset;
                    if (size > MAX_MARKER_DATA_SIZE)
                      size = MAX_MARKER_DATA_SIZE;

                    /* In this case we are just getting started with the
                       header of the marker.  Write that portion out */
                if (ss->icc_position == -1) {
                  byte length_byte[2];
                  byte curr_mark = ss->icc_marker + 1;
                  ulong total_length;

                  if ((uint) (pw->limit - pw->ptr) < (sizeof(marker) + ICC_OVERHEAD))
                        return 1;
                  total_length = size + ICC_OVERHEAD;
                  memcpy(pw->ptr + 1, marker, sizeof(marker));
                  length_byte[0] = total_length >> 8;
                  length_byte[1] = total_length & 0xFF;
                  memcpy(pw->ptr + 3, length_byte, sizeof(length_byte));
                  memcpy(pw->ptr + 5, "ICC_PROFILE", 12); /* Null included */
                  memcpy(pw->ptr + 17, &curr_mark, 1);
                  memcpy(pw->ptr + 18, &num_mark, 1);
                  pw->ptr += sizeof(marker) + ICC_OVERHEAD;
                  ss->icc_position = 0;
                }
                    /* Now write out the actual profile data */
                while (ss->icc_position < size) {
                  ulong avail_bytes, num_bytes;

                  avail_bytes = (ulong) (pw->limit - pw->ptr);
                  if (avail_bytes == 0)
                      return 1;
                  num_bytes = (size - ss->icc_position);
                  if (num_bytes > avail_bytes)
                      num_bytes = avail_bytes;
                  memcpy(pw->ptr + 1,  ss->icc_profile->buffer + offset + ss->icc_position, num_bytes);
                  ss->icc_position += num_bytes;
                  pw->ptr += num_bytes;
                }
                    /* Move on to the next marker */
                ++ss->icc_marker;
                ss->icc_position = -1;
            }
              dest->next_output_byte = pw->ptr + 1;
              dest->free_in_buffer = pw->limit - pw->ptr;
          }
          ss->phase = 4;
          /* falls through */
        case 4:   /* markers written, processing data */
            while (jcdp->cinfo.image_height > jcdp->cinfo.next_scanline) {
                int written;

                /*
                 * The data argument for jpeg_write_scanlines is
                 * declared as a JSAMPARRAY.  There is no corresponding
                 * const type, so we must remove const from the
                 * argument that we are passing here.  (Tom Lane of IJG
                 * judges that providing const analogues of the
                 * interface types wouldn't be worth the trouble.)
                 */
                /*const */ byte *samples = (byte *) (pr->ptr + 1);

                if_debug1m('w', st->memory, "[wde]next_scanline=%u\n",
                           jcdp->cinfo.next_scanline);
                if ((uint) (pr->limit - pr->ptr) < ss->scan_line_size) {
                    if (last)
                        return ERRC;  /* premature EOD */
                    return 0; /* need more data */
                }
                written = gs_jpeg_write_scanlines(ss, &samples, 1);
                if (written < 0)
                    return ERRC;
                if_debug3m('w', st->memory, "[wde]write returns %d, used=%u, written=%u\n",
                           written,
                           (uint) (samples - 1 - pr->ptr),
                           (uint) (dest->next_output_byte - 1 - pw->ptr));
                pw->ptr = dest->next_output_byte - 1;
                if (!written)
                    return 1;  /* output full */
                pr->ptr += ss->scan_line_size;
            }
            ss->phase = 5;
            /* falls through */
        case 5:   /* all data processed, finishing */
            /* jpeg_finish_compress can't suspend, so write its output
             * to a fixed-size internal buffer.
             */
            dest->next_output_byte = jcdp->finish_compress_buf;
            dest->free_in_buffer = sizeof(jcdp->finish_compress_buf);
            if (gs_jpeg_finish_compress(ss) < 0)
                return ERRC;
            jcdp->fcb_size =
                dest->next_output_byte - jcdp->finish_compress_buf;
            jcdp->fcb_pos = 0;
            ss->phase = 6;
            /* falls through */
        case 6:   /* copy the final data to the output */
            if (jcdp->fcb_pos < jcdp->fcb_size) {
                int count = min(jcdp->fcb_size - jcdp->fcb_pos,
                                pw->limit - pw->ptr);

                if_debug1m('w', st->memory, "[wde]copying final %d\n", count);
                memcpy(pw->ptr + 1, jcdp->finish_compress_buf + jcdp->fcb_pos,
                       count);
                jcdp->fcb_pos += count;
                pw->ptr += count;
                if (jcdp->fcb_pos < jcdp->fcb_size)
                    return 1;
            }
            return EOFC;
    }
    /* Default case can't happen.... */
    return ERRC;
}

/* Stream template */
const stream_template s_DCTE_template =
{&st_DCT_state, s_DCTE_init, s_DCTE_process, 1000, 4000, NULL,
 s_DCTE_set_defaults
};

Coverage Report

Created: 2025-06-24 07:01

Line	Count	Source (jump to first uncovered line)
1		/* Copyright (C) 2001-2025 Artifex Software, Inc.
2		All Rights Reserved.
3
4		This software is provided AS-IS with no warranty, either express or
5		implied.
6
7		This software is distributed under license and may not be copied,
8		modified or distributed except as expressly authorized under the terms
9		of the license contained in the file LICENSE in this distribution.
10
11		Refer to licensing information at http://www.artifex.com or contact
12		Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
13		CA 94129, USA, for further information.
14		*/
15
16
17		/* DCT encoding filter stream */
18		#include "memory_.h"
19		#include "stdio_.h"
20		#include "jpeglib_.h"
21		#include "jerror_.h"
22		#include "gdebug.h"
23		#include "gsmemory.h"
24		#include "strimpl.h"
25		#include "sdct.h"
26		#include "sjpeg.h"
27
28	0	#define ICC_OVERHEAD 16
29	0	#define MAX_MARKER_DATA_SIZE (65535 - ICC_OVERHEAD)
30
31		public_st_jpeg_compress_data();
32
33		/* ------ DCTEncode ------ */
34
35		/* JPEG destination manager procedures */
36		static void
37		dcte_init_destination(j_compress_ptr cinfo)
38	6.15k	{
39	6.15k	}
40		static boolean
41		dcte_empty_output_buffer(j_compress_ptr cinfo)
42	5.47k	{
43	5.47k	return FALSE;
44	5.47k	}
45		static void
46		dcte_term_destination(j_compress_ptr cinfo)
47	5.80k	{
48	5.80k	}
49
50		/* Set the defaults for the DCTEncode filter. */
51		static void
52		s_DCTE_set_defaults(stream_state * st)
53	6.15k	{
54	6.15k	stream_DCT_state const ss = (stream_DCT_state ) st;
55
56	6.15k	s_DCT_set_defaults(st);
57	6.15k	ss->QFactor = 1.0;
58	6.15k	ss->ColorTransform = -1;
59	6.15k	ss->Markers.data = 0;
60	6.15k	ss->Markers.size = 0;
61	6.15k	ss->NoMarker = true;
62	6.15k	}
63
64		/* Initialize DCTEncode filter */
65		static int
66		s_DCTE_init(stream_state * st)
67	6.15k	{
68	6.15k	stream_DCT_state const ss = (stream_DCT_state ) st;
69	6.15k	struct jpeg_destination_mgr *dest = &ss->data.compress->destination;
70
71	6.15k	dest->init_destination = dcte_init_destination;
72	6.15k	dest->empty_output_buffer = dcte_empty_output_buffer;
73	6.15k	dest->term_destination = dcte_term_destination;
74	6.15k	ss->data.common->memory = ss->jpeg_memory;
75	6.15k	ss->data.compress->cinfo.dest = dest;
76	6.15k	ss->phase = 0;
77	6.15k	ss->icc_marker = 0;
78	6.15k	ss->icc_position = -1;
79	6.15k	return 0;
80	6.15k	}
81
82		/* Process a buffer */
83		static int
84		s_DCTE_process(stream_state * st, stream_cursor_read * pr,
85		stream_cursor_write * pw, bool last)
86	109k	{
87	109k	stream_DCT_state const ss = (stream_DCT_state ) st;
88	109k	jpeg_compress_data *jcdp = ss->data.compress;
89	109k	struct jpeg_destination_mgr *dest = jcdp->cinfo.dest;
90
91	109k	if_debug2m('w', st->memory, "[wde]process avail=%u, last=%d\n",
92	109k	(uint) (pr->limit - pr->ptr), last);
93	109k	dest->next_output_byte = pw->ptr + 1;
94	109k	dest->free_in_buffer = pw->limit - pw->ptr;
95	109k	switch (ss->phase) {
96	6.15k	case 0: /* not initialized yet */
97	6.15k	if (gs_jpeg_start_compress(ss, TRUE) < 0)
98	23	return ERRC;
99	6.15k	if_debug4m('w', st->memory, "[wde]width=%u, height=%u, components=%d, scan_line_size=%u\n",
100	6.12k	jcdp->cinfo.image_width,
101	6.12k	jcdp->cinfo.image_height,
102	6.12k	jcdp->cinfo.input_components,
103	6.12k	ss->scan_line_size);
104	6.12k	pw->ptr = dest->next_output_byte - 1;
105	6.12k	ss->phase = 1;
106		/* falls through */
107	6.12k	case 1: /* initialized, Markers not written */
108	6.12k	if (pw->limit - pw->ptr < ss->Markers.size)
109	0	return 1;
110	6.12k	if (ss->Markers.size)
111	0	memcpy(pw->ptr + 1, ss->Markers.data, ss->Markers.size);
112	6.12k	pw->ptr += ss->Markers.size;
113	6.12k	ss->phase = 2;
114		/* falls through */
115	6.12k	case 2: /* still need to write Adobe marker */
116	6.12k	if (!ss->NoMarker) {
117	6.12k	static const byte Adobe[] =
118	6.12k	{
119	6.12k	0xFF, JPEG_APP0 + 14, 0, 14, /* parameter length */
120	6.12k	'A', 'd', 'o', 'b', 'e',
121	6.12k	0, 100, /* Version */
122	6.12k	0, 0, /* Flags0 */
123	6.12k	0, 0, /* Flags1 */
124	6.12k	0 /* ColorTransform */
125	6.12k	};
126
127	18.3k	#define ADOBE_MARKER_LEN sizeof(Adobe)
128	6.12k	if (pw->limit - pw->ptr < ADOBE_MARKER_LEN)
129	0	return 1;
130	6.12k	memcpy(pw->ptr + 1, Adobe, ADOBE_MARKER_LEN);
131	6.12k	pw->ptr += ADOBE_MARKER_LEN;
132	6.12k	*pw->ptr = ss->ColorTransform;
133	6.12k	#undef ADOBE_MARKER_LEN
134	6.12k	}
135	6.12k	dest->next_output_byte = pw->ptr + 1;
136	6.12k	dest->free_in_buffer = pw->limit - pw->ptr;
137	6.12k	ss->phase = 3;
138		/* falls through */
139	6.12k	case 3:
140		/* If we have it, then write out the ICC profile */
141		/* Due to size limitations allowed in APP0 markers, the profile
142		may have to be written in mutiple markers */
143	6.12k	if (ss->icc_profile != NULL) {
144	0	static const char marker[2] = {0xFF, 0xE2}; /* JPEG_APP0 + 2 */
145	0	byte num_mark;
146
147		/* Number of markers */
148	0	num_mark = ss->icc_profile->buffer_size / MAX_MARKER_DATA_SIZE;
149	0	if (num_mark * MAX_MARKER_DATA_SIZE < ss->icc_profile->buffer_size) {
150	0	num_mark++;
151	0	}
152	0	while (ss->icc_marker < num_mark) {
153	0	ulong offset = ss->icc_marker * MAX_MARKER_DATA_SIZE;
154	0	ulong size;
155
156	0	size = ss->icc_profile->buffer_size - offset;
157	0	if (size > MAX_MARKER_DATA_SIZE)
158	0	size = MAX_MARKER_DATA_SIZE;
159
160		/* In this case we are just getting started with the
161		header of the marker. Write that portion out */
162	0	if (ss->icc_position == -1) {
163	0	byte length_byte[2];
164	0	byte curr_mark = ss->icc_marker + 1;
165	0	ulong total_length;
166
167	0	if ((uint) (pw->limit - pw->ptr) < (sizeof(marker) + ICC_OVERHEAD))
168	0	return 1;
169	0	total_length = size + ICC_OVERHEAD;
170	0	memcpy(pw->ptr + 1, marker, sizeof(marker));
171	0	length_byte[0] = total_length >> 8;
172	0	length_byte[1] = total_length & 0xFF;
173	0	memcpy(pw->ptr + 3, length_byte, sizeof(length_byte));
174	0	memcpy(pw->ptr + 5, "ICC_PROFILE", 12); /* Null included */
175	0	memcpy(pw->ptr + 17, &curr_mark, 1);
176	0	memcpy(pw->ptr + 18, &num_mark, 1);
177	0	pw->ptr += sizeof(marker) + ICC_OVERHEAD;
178	0	ss->icc_position = 0;
179	0	}
180		/* Now write out the actual profile data */
181	0	while (ss->icc_position < size) {
182	0	ulong avail_bytes, num_bytes;
183
184	0	avail_bytes = (ulong) (pw->limit - pw->ptr);
185	0	if (avail_bytes == 0)
186	0	return 1;
187	0	num_bytes = (size - ss->icc_position);
188	0	if (num_bytes > avail_bytes)
189	0	num_bytes = avail_bytes;
190	0	memcpy(pw->ptr + 1, ss->icc_profile->buffer + offset + ss->icc_position, num_bytes);
191	0	ss->icc_position += num_bytes;
192	0	pw->ptr += num_bytes;
193	0	}
194		/* Move on to the next marker */
195	0	++ss->icc_marker;
196	0	ss->icc_position = -1;
197	0	}
198	0	dest->next_output_byte = pw->ptr + 1;
199	0	dest->free_in_buffer = pw->limit - pw->ptr;
200	0	}
201	6.12k	ss->phase = 4;
202		/* falls through */
203	109k	case 4: /* markers written, processing data */
204	687k	while (jcdp->cinfo.image_height > jcdp->cinfo.next_scanline) {
205	681k	int written;
206
207		/*
208		* The data argument for jpeg_write_scanlines is
209		* declared as a JSAMPARRAY. There is no corresponding
210		* const type, so we must remove const from the
211		* argument that we are passing here. (Tom Lane of IJG
212		* judges that providing const analogues of the
213		* interface types wouldn't be worth the trouble.)
214		*/
215		/const / byte samples = (byte ) (pr->ptr + 1);
216
217	681k	if_debug1m('w', st->memory, "[wde]next_scanline=%u\n",
218	681k	jcdp->cinfo.next_scanline);
219	681k	if ((uint) (pr->limit - pr->ptr) < ss->scan_line_size) {
220	98.3k	if (last)
221	329	return ERRC; /* premature EOD */
222	97.9k	return 0; /* need more data */
223	98.3k	}
224	582k	written = gs_jpeg_write_scanlines(ss, &samples, 1);
225	582k	if (written < 0)
226	0	return ERRC;
227	582k	if_debug3m('w', st->memory, "[wde]write returns %d, used=%u, written=%u\n",
228	582k	written,
229	582k	(uint) (samples - 1 - pr->ptr),
230	582k	(uint) (dest->next_output_byte - 1 - pw->ptr));
231	582k	pw->ptr = dest->next_output_byte - 1;
232	582k	if (!written)
233	5.47k	return 1; /* output full */
234	577k	pr->ptr += ss->scan_line_size;
235	577k	}
236	5.80k	ss->phase = 5;
237		/* falls through */
238	5.80k	case 5: /* all data processed, finishing */
239		/* jpeg_finish_compress can't suspend, so write its output
240		* to a fixed-size internal buffer.
241		*/
242	5.80k	dest->next_output_byte = jcdp->finish_compress_buf;
243	5.80k	dest->free_in_buffer = sizeof(jcdp->finish_compress_buf);
244	5.80k	if (gs_jpeg_finish_compress(ss) < 0)
245	0	return ERRC;
246	5.80k	jcdp->fcb_size =
247	5.80k	dest->next_output_byte - jcdp->finish_compress_buf;
248	5.80k	jcdp->fcb_pos = 0;
249	5.80k	ss->phase = 6;
250		/* falls through */
251	5.80k	case 6: /* copy the final data to the output */
252	5.80k	if (jcdp->fcb_pos < jcdp->fcb_size) {
253	5.80k	int count = min(jcdp->fcb_size - jcdp->fcb_pos,
254	5.80k	pw->limit - pw->ptr);
255
256	5.80k	if_debug1m('w', st->memory, "[wde]copying final %d\n", count);
257	5.80k	memcpy(pw->ptr + 1, jcdp->finish_compress_buf + jcdp->fcb_pos,
258	5.80k	count);
259	5.80k	jcdp->fcb_pos += count;
260	5.80k	pw->ptr += count;
261	5.80k	if (jcdp->fcb_pos < jcdp->fcb_size)
262	0	return 1;
263	5.80k	}
264	5.80k	return EOFC;
265	109k	}
266		/* Default case can't happen.... */
267	0	return ERRC;
268	109k	}
269
270		/* Stream template */
271		const stream_template s_DCTE_template =
272		{&st_DCT_state, s_DCTE_init, s_DCTE_process, 1000, 4000, NULL,
273		s_DCTE_set_defaults
274		};