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| #define JPEG_INTERNALS |
| #include "jinclude.h" |
| #include "jpeglib.h" |
| #include "jerror.h" |
| |
| #ifndef HAVE_STDLIB_H |
| extern void *malloc(size_t size); |
| #endif |
| |
| |
| #define ICC_MARKER (JPEG_APP0 + 2) |
| #define ICC_OVERHEAD_LEN 14 |
| |
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| LOCAL(boolean) |
| marker_is_icc(jpeg_saved_marker_ptr marker) |
| { |
| return |
| marker->marker == ICC_MARKER && |
| marker->data_length >= ICC_OVERHEAD_LEN && |
| |
| GETJOCTET(marker->data[0]) == 0x49 && |
| GETJOCTET(marker->data[1]) == 0x43 && |
| GETJOCTET(marker->data[2]) == 0x43 && |
| GETJOCTET(marker->data[3]) == 0x5F && |
| GETJOCTET(marker->data[4]) == 0x50 && |
| GETJOCTET(marker->data[5]) == 0x52 && |
| GETJOCTET(marker->data[6]) == 0x4F && |
| GETJOCTET(marker->data[7]) == 0x46 && |
| GETJOCTET(marker->data[8]) == 0x49 && |
| GETJOCTET(marker->data[9]) == 0x4C && |
| GETJOCTET(marker->data[10]) == 0x45 && |
| GETJOCTET(marker->data[11]) == 0x0; |
| } |
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| GLOBAL(boolean) |
| jpeg_read_icc_profile(j_decompress_ptr cinfo, JOCTET **icc_data_ptr, |
| unsigned int *icc_data_len) |
| { |
| jpeg_saved_marker_ptr marker; |
| int num_markers = 0; |
| int seq_no; |
| JOCTET *icc_data; |
| unsigned int total_length; |
| #define MAX_SEQ_NO 255 |
| char marker_present[MAX_SEQ_NO + 1]; |
| unsigned int data_length[MAX_SEQ_NO + 1]; |
| unsigned int data_offset[MAX_SEQ_NO + 1]; |
| |
| if (icc_data_ptr == NULL || icc_data_len == NULL) |
| ERREXIT(cinfo, JERR_BUFFER_SIZE); |
| if (cinfo->global_state < DSTATE_READY) |
| ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); |
| |
| *icc_data_ptr = NULL; |
| *icc_data_len = 0; |
| |
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| |
| for (seq_no = 1; seq_no <= MAX_SEQ_NO; seq_no++) |
| marker_present[seq_no] = 0; |
| |
| for (marker = cinfo->marker_list; marker != NULL; marker = marker->next) { |
| if (marker_is_icc(marker)) { |
| if (num_markers == 0) |
| num_markers = GETJOCTET(marker->data[13]); |
| else if (num_markers != GETJOCTET(marker->data[13])) { |
| WARNMS(cinfo, JWRN_BOGUS_ICC); |
| return FALSE; |
| } |
| seq_no = GETJOCTET(marker->data[12]); |
| if (seq_no <= 0 || seq_no > num_markers) { |
| WARNMS(cinfo, JWRN_BOGUS_ICC); |
| return FALSE; |
| } |
| if (marker_present[seq_no]) { |
| WARNMS(cinfo, JWRN_BOGUS_ICC); |
| return FALSE; |
| } |
| marker_present[seq_no] = 1; |
| data_length[seq_no] = marker->data_length - ICC_OVERHEAD_LEN; |
| } |
| } |
| |
| if (num_markers == 0) |
| return FALSE; |
| |
| |
| |
| |
| |
| total_length = 0; |
| for (seq_no = 1; seq_no <= num_markers; seq_no++) { |
| if (marker_present[seq_no] == 0) { |
| WARNMS(cinfo, JWRN_BOGUS_ICC); |
| return FALSE; |
| } |
| data_offset[seq_no] = total_length; |
| total_length += data_length[seq_no]; |
| } |
| |
| if (total_length == 0) { |
| WARNMS(cinfo, JWRN_BOGUS_ICC); |
| return FALSE; |
| } |
| |
| |
| icc_data = (JOCTET *)malloc(total_length * sizeof(JOCTET)); |
| if (icc_data == NULL) |
| ERREXIT1(cinfo, JERR_OUT_OF_MEMORY, 11); |
| |
| |
| for (marker = cinfo->marker_list; marker != NULL; marker = marker->next) { |
| if (marker_is_icc(marker)) { |
| JOCTET FAR *src_ptr; |
| JOCTET *dst_ptr; |
| unsigned int length; |
| seq_no = GETJOCTET(marker->data[12]); |
| dst_ptr = icc_data + data_offset[seq_no]; |
| src_ptr = marker->data + ICC_OVERHEAD_LEN; |
| length = data_length[seq_no]; |
| while (length--) { |
| *dst_ptr++ = *src_ptr++; |
| } |
| } |
| } |
| |
| *icc_data_ptr = icc_data; |
| *icc_data_len = total_length; |
| |
| return TRUE; |
| } |