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175 lines
4.4 KiB
175 lines
4.4 KiB
2 months ago
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/*
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* Image Library -- Pixels iteration
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*
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* (c) 2006 Pavel Charvat <pchar@ucw.cz>
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*
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* This software may be freely distributed and used according to the terms
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* of the GNU Lesser General Public License.
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*/
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#ifndef IMAGE_WALK_PREFIX
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# error Undefined IMAGE_WALK_PREFIX
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#endif
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#define P(x) IMAGE_WALK_PREFIX(x)
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#if !defined(IMAGE_WALK_UNROLL)
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# define IMAGE_WALK_UNROLL 1
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#elif IMAGE_WALK_UNROLL != 1 && IMAGE_WALK_UNROLL != 2 && IMAGE_WALK_UNROLL != 4
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# error IMAGE_WALK_UNROLL must be 1, 2 or 4
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#endif
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#ifndef IMAGE_WALK_IMAGE
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# define IMAGE_WALK_IMAGE P(img)
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#endif
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#ifndef IMAGE_WALK_PIXELS
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# define IMAGE_WALK_PIXELS (IMAGE_WALK_IMAGE->pixels)
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#endif
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#ifndef IMAGE_WALK_COLS
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# define IMAGE_WALK_COLS (IMAGE_WALK_IMAGE->cols)
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#endif
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#ifndef IMAGE_WALK_ROWS
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# define IMAGE_WALK_ROWS (IMAGE_WALK_IMAGE->rows)
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#endif
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#ifndef IMAGE_WALK_COL_STEP
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# define IMAGE_WALK_COL_STEP (IMAGE_WALK_IMAGE->pixel_size)
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#endif
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#ifndef IMAGE_WALK_ROW_STEP
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# define IMAGE_WALK_ROW_STEP (IMAGE_WALK_IMAGE->row_size)
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#endif
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#ifdef IMAGE_WALK_DOUBLE
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# ifndef IMAGE_WALK_SEC_IMAGE
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# define IMAGE_WALK_SEC_IMAGE P(sec_img)
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# endif
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# ifndef IMAGE_WALK_SEC_PIXELS
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# define IMAGE_WALK_SEC_PIXELS (IMAGE_WALK_SEC_IMAGE->pixels)
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# endif
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# ifndef IMAGE_WALK_SEC_COLS
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# define IMAGE_WALK_SEC_COLS (IMAGE_WALK_SEC_IMAGE->cols)
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# endif
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# ifndef IMAGE_WALK_SEC_ROWS
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# define IMAGE_WALK_SEC_ROWS (IMAGE_WALK_SEC_IMAGE->rows)
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# endif
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# ifndef IMAGE_WALK_SEC_COL_STEP
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# define IMAGE_WALK_SEC_COL_STEP (IMAGE_WALK_SEC_IMAGE->pixel_size)
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# endif
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# ifndef IMAGE_WALK_SEC_ROW_STEP
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# define IMAGE_WALK_SEC_ROW_STEP (IMAGE_WALK_SEC_IMAGE->row_size)
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# endif
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# define IMAGE_WALK__STEP IMAGE_WALK_DO_STEP; P(pos) += P(col_step); P(sec_pos) += P(sec_col_step)
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#else
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# define IMAGE_WALK__STEP IMAGE_WALK_DO_STEP; P(pos) += P(col_step)
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#endif
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#ifndef IMAGE_WALK_DO_START
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# define IMAGE_WALK_DO_START
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#endif
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#ifndef IMAGE_WALK_DO_END
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# define IMAGE_WALK_DO_END
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#endif
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#ifndef IMAGE_WALK_DO_ROW_START
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# define IMAGE_WALK_DO_ROW_START
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#endif
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#ifndef IMAGE_WALK_DO_ROW_END
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# define IMAGE_WALK_DO_ROW_END
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#endif
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#ifndef IMAGE_WALK_DO_STEP
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# define IMAGE_WALK_DO_STEP
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#endif
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#ifndef IMAGE_WALK_INLINE
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static void
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#ifdef IMAGE_WALK_FUNC_NAME
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IMAGE_WALK_FUNC_NAME
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#else
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P(walk)
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#endif
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(struct image *P(img)
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# ifdef IMAGE_WALK_DOUBLE
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, struct image *P(sec_img)
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# endif
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# ifdef IMAGE_WALK_EXTRA_ARGS
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, IMAGE_WALK_EXTRA_ARGS
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# endif
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)
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#endif
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{
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uint P(cols) = IMAGE_WALK_COLS;
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uint P(rows) = IMAGE_WALK_ROWS;
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# if IMAGE_WALK_UNROLL > 1
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uint P(cols_unroll_block_count) = P(cols) / IMAGE_WALK_UNROLL;
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uint P(cols_unroll_end_count) = P(cols) % IMAGE_WALK_UNROLL;
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# endif
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byte *P(pos) = IMAGE_WALK_PIXELS, *P(row_start) = P(pos);
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int P(col_step) = IMAGE_WALK_COL_STEP;
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int P(row_step) = IMAGE_WALK_ROW_STEP;
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# ifdef IMAGE_WALK_DOUBLE
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byte *P(sec_pos) = IMAGE_WALK_SEC_PIXELS, *P(sec_row_start) = P(sec_pos);
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int P(sec_col_step) = IMAGE_WALK_SEC_COL_STEP;
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int P(sec_row_step) = IMAGE_WALK_SEC_ROW_STEP;
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# endif
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IMAGE_WALK_DO_START;
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while (P(rows)--)
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{
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IMAGE_WALK_DO_ROW_START;
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# if IMAGE_WALK_UNROLL == 1
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for (uint P(_i) = P(cols); P(_i)--; )
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# else
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for (uint P(_i) = P(cols_unroll_block_count); P(_i)--; )
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# endif
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{
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# if IMAGE_WALK_UNROLL >= 4
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IMAGE_WALK__STEP;
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IMAGE_WALK__STEP;
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# endif
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# if IMAGE_WALK_UNROLL >= 2
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IMAGE_WALK__STEP;
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# endif
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IMAGE_WALK__STEP;
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}
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# if IMAGE_WALK_UNROLL > 1
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for (uint P(_i) = P(cols_unroll_end_count); P(_i)--; )
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{
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IMAGE_WALK__STEP;
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}
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# endif
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IMAGE_WALK_DO_ROW_END;
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P(pos) = (P(row_start) += P(row_step));
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# ifdef IMAGE_WALK_DOUBLE
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P(sec_pos) = (P(sec_row_start) += P(sec_row_step));
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# endif
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}
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IMAGE_WALK_DO_END;
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}
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#undef IMAGE_WALK_PREFIX
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#undef IMAGE_WALK_FUNC_NAME
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#undef IMAGE_WALK_INLINE
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#undef IMAGE_WALK_UNROLL
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#undef IMAGE_WALK_DOUBLE
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#undef IMAGE_WALK_EXTRA_ARGS
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#undef IMAGE_WALK_IMAGE
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#undef IMAGE_WALK_PIXELS
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#undef IMAGE_WALK_COLS
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#undef IMAGE_WALK_ROWS
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#undef IMAGE_WALK_COL_STEP
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#undef IMAGE_WALK_ROW_STEP
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#undef IMAGE_WALK_SEC_IMAGE
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#undef IMAGE_WALK_SEC_PIXELS
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#undef IMAGE_WALK_SEC_COLS
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#undef IMAGE_WALK_SEC_ROWS
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#undef IMAGE_WALK_SEC_COL_STEP
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#undef IMAGE_WALK_SEC_ROW_STEP
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#undef IMAGE_WALK_DO_START
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#undef IMAGE_WALK_DO_END
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#undef IMAGE_WALK_DO_ROW_START
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#undef IMAGE_WALK_DO_ROW_END
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#undef IMAGE_WALK_DO_STEP
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#undef IMAGE_WALK__STEP
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#undef P
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