52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define BLOCKROWS 3
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#define NEXT2(x) (((x) + 1) & -2) // uguale o successivo (pad)
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#define NEXT4(x) (((x) + 3) & -4) // uguale o successivo multiplo di 4 (pad)
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#define FIXDPI(x) ((x) / 65536.) // fixedpt
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typedef long psdByte;
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typedef unsigned short psdUint16;
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typedef long psdPixel;
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enum { RAWDATA,
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RLECOMP,
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ZIPWITHOUTPREDICTION,
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ZIPWITHPREDICTION };
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struct TPSDChannelInfo {
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int id; // channel id
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int comptype; // channel's compression type
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psdPixel rows, cols, rowbytes; // computed by dochannel()
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// FIXME: need depth??
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psdByte length; // channel byte count in file
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psdByte filepos; // file offset of channel data (AFTER compression type)
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psdByte *rowpos; // row data file positions (RLE ONLY)
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unsigned char *unzipdata; // uncompressed data (ZIP ONLY)
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};
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int unpackrow(unsigned char *out, unsigned char *in, psdPixel outlen, psdPixel inlen);
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void readrow(FILE *psd,
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TPSDChannelInfo *chan,
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psdPixel rowIndex,
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unsigned char *inbuffer,
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unsigned char *outbuffer);
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void skipBlock(FILE *f);
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void *mymalloc(long n);
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unsigned read2UBytes(FILE *f);
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int read2Bytes(FILE *f);
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long read4Bytes(FILE *f);
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int psdUnzipWithoutPrediction(unsigned char *src_buf, int src_len,
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unsigned char *dst_buf, int dst_len);
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int psdUnzipWithPrediction(unsigned char *src_buf, int src_len,
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unsigned char *dst_buf, int dst_len,
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int row_size, int color_depth);
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