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- #define JPEG_INTERNALS
- #include "jinclude.h"
- #include "jpeglib.h"
- const int jpeg_zigzag_order[DCTSIZE2] = {
- 0, 1, 5, 6, 14, 15, 27, 28,
- 2, 4, 7, 13, 16, 26, 29, 42,
- 3, 8, 12, 17, 25, 30, 41, 43,
- 9, 11, 18, 24, 31, 40, 44, 53,
- 10, 19, 23, 32, 39, 45, 52, 54,
- 20, 22, 33, 38, 46, 51, 55, 60,
- 21, 34, 37, 47, 50, 56, 59, 61,
- 35, 36, 48, 49, 57, 58, 62, 63
- };
- const int jpeg_natural_order[DCTSIZE2+16] = {
- 0, 1, 8, 16, 9, 2, 3, 10,
- 17, 24, 32, 25, 18, 11, 4, 5,
- 12, 19, 26, 33, 40, 48, 41, 34,
- 27, 20, 13, 6, 7, 14, 21, 28,
- 35, 42, 49, 56, 57, 50, 43, 36,
- 29, 22, 15, 23, 30, 37, 44, 51,
- 58, 59, 52, 45, 38, 31, 39, 46,
- 53, 60, 61, 54, 47, 55, 62, 63,
- 63, 63, 63, 63, 63, 63, 63, 63,
- 63, 63, 63, 63, 63, 63, 63, 63
- };
- GLOBAL long
- jdiv_round_up (long a, long b)
- {
- return (a + b - 1L) / b;
- }
- GLOBAL long
- jround_up (long a, long b)
- {
- a += b - 1L;
- return a - (a % b);
- }
- #ifndef NEED_FAR_POINTERS
- #define FMEMCOPY(dest,src,size) MEMCOPY(dest,src,size)
- #define FMEMZERO(target,size) MEMZERO(target,size)
- #else
- #ifdef USE_FMEM
- #define FMEMCOPY(dest,src,size) _fmemcpy((void FAR *)(dest), (const void FAR *)(src), (size_t)(size))
- #define FMEMZERO(target,size) _fmemset((void FAR *)(target), 0, (size_t)(size))
- #endif
- #endif
- GLOBAL void
- jcopy_sample_rows (JSAMPARRAY input_array, int source_row,
- JSAMPARRAY output_array, int dest_row,
- int num_rows, JDIMENSION num_cols)
- {
- register JSAMPROW inptr, outptr;
- #ifdef FMEMCOPY
- register size_t count = (size_t) (num_cols * SIZEOF(JSAMPLE));
- #else
- register JDIMENSION count;
- #endif
- register int row;
- input_array += source_row;
- output_array += dest_row;
- for (row = num_rows; row > 0; row--) {
- inptr = *input_array++;
- outptr = *output_array++;
- #ifdef FMEMCOPY
- FMEMCOPY(outptr, inptr, count);
- #else
- for (count = num_cols; count > 0; count--)
- *outptr++ = *inptr++;
- #endif
- }
- }
- GLOBAL void
- jcopy_block_row (JBLOCKROW input_row, JBLOCKROW output_row,
- JDIMENSION num_blocks)
- {
- #ifdef FMEMCOPY
- FMEMCOPY(output_row, input_row, num_blocks * (DCTSIZE2 * SIZEOF(JCOEF)));
- #else
- register JCOEFPTR inptr, outptr;
- register long count;
- inptr = (JCOEFPTR) input_row;
- outptr = (JCOEFPTR) output_row;
- for (count = (long) num_blocks * DCTSIZE2; count > 0; count--) {
- *outptr++ = *inptr++;
- }
- #endif
- }
- GLOBAL void
- jzero_far (void FAR * target, size_t bytestozero)
- {
- #ifdef FMEMZERO
- FMEMZERO(target, bytestozero);
- #else
- register char FAR * ptr = (char FAR *) target;
- register size_t count;
- for (count = bytestozero; count > 0; count--) {
- *ptr++ = 0;
- }
- #endif
- }
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