diff options
Diffstat (limited to 'jpeg/transupp.c')
| -rw-r--r-- | jpeg/transupp.c | 682 |
1 files changed, 649 insertions, 33 deletions
diff --git a/jpeg/transupp.c b/jpeg/transupp.c index d10f57b45..7ee74ef47 100644 --- a/jpeg/transupp.c +++ b/jpeg/transupp.c @@ -1,7 +1,7 @@ /* * transupp.c * - * Copyright (C) 1997-2017, Thomas G. Lane, Guido Vollbeding. + * Copyright (C) 1997-2019, Thomas G. Lane, Guido Vollbeding. * This file is part of the Independent JPEG Group's software. * For conditions of distribution and use, see the accompanying README file. * @@ -14,6 +14,8 @@ /* Although this file really shouldn't have access to the library internals, * it's helpful to let it call jround_up() and jcopy_block_row(). + * Also, the (switchable) virtual memory adaptation code for + * the drop feature has dependencies on library internals. */ #define JPEG_INTERNALS @@ -75,6 +77,274 @@ */ +/* Drop code may be used with or without virtual memory adaptation code. + * This code has some dependencies on internal library behavior, so you + * may choose to disable it. For example, it doesn't make a difference + * if you only use jmemnobs anyway. + */ +#ifndef DROP_REQUEST_FROM_SRC +#define DROP_REQUEST_FROM_SRC 1 /* 0 disables adaptation */ +#endif + + +#if DROP_REQUEST_FROM_SRC +/* Force jpeg_read_coefficients to request + * the virtual coefficient arrays from + * the source decompression object. + */ +METHODDEF(jvirt_barray_ptr) +drop_request_virt_barray (j_common_ptr cinfo, int pool_id, boolean pre_zero, + JDIMENSION blocksperrow, JDIMENSION numrows, + JDIMENSION maxaccess) +{ + j_common_ptr srcinfo = (j_common_ptr) cinfo->client_data; + + return (*srcinfo->mem->request_virt_barray) + (srcinfo, pool_id, pre_zero, + blocksperrow, numrows, maxaccess); +} + + +/* Force jpeg_read_coefficients to return + * after requesting and before accessing + * the virtual coefficient arrays. + */ +METHODDEF(int) +drop_consume_input (j_decompress_ptr cinfo) +{ + return JPEG_SUSPENDED; +} + + +METHODDEF(void) +drop_start_input_pass (j_decompress_ptr cinfo) +{ + cinfo->inputctl->consume_input = drop_consume_input; +} + + +LOCAL(void) +drop_request_from_src (j_decompress_ptr dropinfo, j_decompress_ptr srcinfo) +{ + void *save_client_data; + JMETHOD(jvirt_barray_ptr, save_request_virt_barray, + (j_common_ptr cinfo, int pool_id, boolean pre_zero, + JDIMENSION blocksperrow, JDIMENSION numrows, JDIMENSION maxaccess)); + JMETHOD(void, save_start_input_pass, (j_decompress_ptr cinfo)); + + /* Set custom method pointers, save original pointers */ + save_client_data = dropinfo->client_data; + dropinfo->client_data = (void *) srcinfo; + save_request_virt_barray = dropinfo->mem->request_virt_barray; + dropinfo->mem->request_virt_barray = drop_request_virt_barray; + save_start_input_pass = dropinfo->inputctl->start_input_pass; + dropinfo->inputctl->start_input_pass = drop_start_input_pass; + + /* Execute only initialization part. + * Requested coefficient arrays will be realized later by the srcinfo object. + * Next call to the same function will then do the actual data reading. + * NB: since we request the coefficient arrays from another object, + * the inherent realization call is effectively a no-op. + */ + (void) jpeg_read_coefficients(dropinfo); + + /* Reset method pointers */ + dropinfo->client_data = save_client_data; + dropinfo->mem->request_virt_barray = save_request_virt_barray; + dropinfo->inputctl->start_input_pass = save_start_input_pass; + /* Do input initialization for first scan now, + * which also resets the consume_input method. + */ + (*save_start_input_pass)(dropinfo); +} +#endif /* DROP_REQUEST_FROM_SRC */ + + +LOCAL(void) +dequant_comp (j_decompress_ptr cinfo, jpeg_component_info *compptr, + jvirt_barray_ptr coef_array, JQUANT_TBL *qtblptr1) +{ + JDIMENSION blk_x, blk_y; + int offset_y, k; + JQUANT_TBL *qtblptr; + JBLOCKARRAY buffer; + JBLOCKROW block; + JCOEFPTR ptr; + + qtblptr = compptr->quant_table; + for (blk_y = 0; blk_y < compptr->height_in_blocks; + blk_y += compptr->v_samp_factor) { + buffer = (*cinfo->mem->access_virt_barray) + ((j_common_ptr) cinfo, coef_array, blk_y, + (JDIMENSION) compptr->v_samp_factor, TRUE); + for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { + block = buffer[offset_y]; + for (blk_x = 0; blk_x < compptr->width_in_blocks; blk_x++) { + ptr = block[blk_x]; + for (k = 0; k < DCTSIZE2; k++) + if (qtblptr->quantval[k] != qtblptr1->quantval[k]) + ptr[k] *= qtblptr->quantval[k] / qtblptr1->quantval[k]; + } + } + } +} + + +LOCAL(void) +requant_comp (j_decompress_ptr cinfo, jpeg_component_info *compptr, + jvirt_barray_ptr coef_array, JQUANT_TBL *qtblptr1) +{ + JDIMENSION blk_x, blk_y; + int offset_y, k; + JQUANT_TBL *qtblptr; + JBLOCKARRAY buffer; + JBLOCKROW block; + JCOEFPTR ptr; + JCOEF temp, qval; + + qtblptr = compptr->quant_table; + for (blk_y = 0; blk_y < compptr->height_in_blocks; + blk_y += compptr->v_samp_factor) { + buffer = (*cinfo->mem->access_virt_barray) + ((j_common_ptr) cinfo, coef_array, blk_y, + (JDIMENSION) compptr->v_samp_factor, TRUE); + for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { + block = buffer[offset_y]; + for (blk_x = 0; blk_x < compptr->width_in_blocks; blk_x++) { + ptr = block[blk_x]; + for (k = 0; k < DCTSIZE2; k++) { + temp = qtblptr->quantval[k]; + qval = qtblptr1->quantval[k]; + if (temp != qval) { + temp *= ptr[k]; + /* The following quantization code is a copy from jcdctmgr.c */ +#ifdef FAST_DIVIDE +#define DIVIDE_BY(a,b) a /= b +#else +#define DIVIDE_BY(a,b) if (a >= b) a /= b; else a = 0 +#endif + if (temp < 0) { + temp = -temp; + temp += qval>>1; /* for rounding */ + DIVIDE_BY(temp, qval); + temp = -temp; + } else { + temp += qval>>1; /* for rounding */ + DIVIDE_BY(temp, qval); + } + ptr[k] = temp; + } + } + } + } + } +} + + +/* Calculate largest common denominator with Euclid's algorithm. + */ +LOCAL(JCOEF) +largest_common_denominator(JCOEF a, JCOEF b) +{ + JCOEF c; + + do { + c = a % b; + a = b; + b = c; + } while (c); + + return a; +} + + +LOCAL(void) +adjust_quant(j_decompress_ptr srcinfo, jvirt_barray_ptr *src_coef_arrays, + j_decompress_ptr dropinfo, jvirt_barray_ptr *drop_coef_arrays, + boolean trim, j_compress_ptr dstinfo) +{ + jpeg_component_info *compptr1, *compptr2; + JQUANT_TBL *qtblptr1, *qtblptr2, *qtblptr3; + int ci, k; + + for (ci = 0; ci < dstinfo->num_components && + ci < dropinfo->num_components; ci++) { + compptr1 = srcinfo->comp_info + ci; + compptr2 = dropinfo->comp_info + ci; + qtblptr1 = compptr1->quant_table; + qtblptr2 = compptr2->quant_table; + for (k = 0; k < DCTSIZE2; k++) { + if (qtblptr1->quantval[k] != qtblptr2->quantval[k]) { + if (trim) + requant_comp(dropinfo, compptr2, drop_coef_arrays[ci], qtblptr1); + else { + qtblptr3 = dstinfo->quant_tbl_ptrs[compptr1->quant_tbl_no]; + for (k = 0; k < DCTSIZE2; k++) + if (qtblptr1->quantval[k] != qtblptr2->quantval[k]) + qtblptr3->quantval[k] = largest_common_denominator + (qtblptr1->quantval[k], qtblptr2->quantval[k]); + dequant_comp(srcinfo, compptr1, src_coef_arrays[ci], qtblptr3); + dequant_comp(dropinfo, compptr2, drop_coef_arrays[ci], qtblptr3); + } + break; + } + } + } +} + + +LOCAL(void) +do_drop (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, + JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, + jvirt_barray_ptr *src_coef_arrays, + j_decompress_ptr dropinfo, jvirt_barray_ptr *drop_coef_arrays, + JDIMENSION drop_width, JDIMENSION drop_height) +/* Drop. If the dropinfo component number is smaller than the destination's, + * we fill in the remaining components with zero. This provides the feature + * of dropping grayscale into (arbitrarily sampled) color images. + */ +{ + JDIMENSION comp_width, comp_height; + JDIMENSION blk_y, x_drop_blocks, y_drop_blocks; + int ci, offset_y; + JBLOCKARRAY src_buffer, dst_buffer; + jpeg_component_info *compptr; + + for (ci = 0; ci < dstinfo->num_components; ci++) { + compptr = dstinfo->comp_info + ci; + comp_width = drop_width * compptr->h_samp_factor; + comp_height = drop_height * compptr->v_samp_factor; + x_drop_blocks = x_crop_offset * compptr->h_samp_factor; + y_drop_blocks = y_crop_offset * compptr->v_samp_factor; + for (blk_y = 0; blk_y < comp_height; blk_y += compptr->v_samp_factor) { + dst_buffer = (*srcinfo->mem->access_virt_barray) + ((j_common_ptr) srcinfo, src_coef_arrays[ci], blk_y + y_drop_blocks, + (JDIMENSION) compptr->v_samp_factor, TRUE); + if (ci < dropinfo->num_components) { +#if DROP_REQUEST_FROM_SRC + src_buffer = (*srcinfo->mem->access_virt_barray) + ((j_common_ptr) srcinfo, drop_coef_arrays[ci], blk_y, +#else + src_buffer = (*dropinfo->mem->access_virt_barray) + ((j_common_ptr) dropinfo, drop_coef_arrays[ci], blk_y, +#endif + (JDIMENSION) compptr->v_samp_factor, FALSE); + for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { + jcopy_block_row(src_buffer[offset_y], + dst_buffer[offset_y] + x_drop_blocks, + comp_width); + } + } else { + for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { + FMEMZERO(dst_buffer[offset_y] + x_drop_blocks, + comp_width * SIZEOF(JBLOCK)); + } + } + } + } +} + + LOCAL(void) do_crop (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, @@ -114,10 +384,10 @@ do_crop (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, LOCAL(void) -do_crop_ext (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, - JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, - jvirt_barray_ptr *src_coef_arrays, - jvirt_barray_ptr *dst_coef_arrays) +do_crop_ext_zero (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, + JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, + jvirt_barray_ptr *src_coef_arrays, + jvirt_barray_ptr *dst_coef_arrays) /* Crop. This is only used when no rotate/flip is requested with the crop. * Extension: If the destination size is larger than the source, we fill in * the extra area with zero (neutral gray). Note we also have to zero partial @@ -148,7 +418,7 @@ do_crop_ext (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, (JDIMENSION) compptr->v_samp_factor, TRUE); if (dstinfo->jpeg_height > srcinfo->output_height) { if (dst_blk_y < y_crop_blocks || - dst_blk_y >= comp_height + y_crop_blocks) { + dst_blk_y >= y_crop_blocks + comp_height) { for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { FMEMZERO(dst_buffer[offset_y], compptr->width_in_blocks * SIZEOF(JBLOCK)); @@ -174,11 +444,11 @@ do_crop_ext (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, jcopy_block_row(src_buffer[offset_y], dst_buffer[offset_y] + x_crop_blocks, comp_width); - if (compptr->width_in_blocks > comp_width + x_crop_blocks) { + if (compptr->width_in_blocks > x_crop_blocks + comp_width) { FMEMZERO(dst_buffer[offset_y] + - comp_width + x_crop_blocks, + x_crop_blocks + comp_width, (compptr->width_in_blocks - - comp_width - x_crop_blocks) * SIZEOF(JBLOCK)); + x_crop_blocks - comp_width) * SIZEOF(JBLOCK)); } } else { jcopy_block_row(src_buffer[offset_y] + x_crop_blocks, @@ -192,6 +462,190 @@ do_crop_ext (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, LOCAL(void) +do_crop_ext_flat (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, + JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, + jvirt_barray_ptr *src_coef_arrays, + jvirt_barray_ptr *dst_coef_arrays) +/* Crop. This is only used when no rotate/flip is requested with the crop. + * Extension: The destination width is larger than the source and we fill in + * the extra area with the DC of the adjacent block. Note we also have to + * fill partial iMCUs at the right and bottom edge of the source image area + * in this case. + */ +{ + JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height; + JDIMENSION dst_blk_x, dst_blk_y, x_crop_blocks, y_crop_blocks; + int ci, offset_y; + JCOEF dc; + JBLOCKARRAY src_buffer, dst_buffer; + jpeg_component_info *compptr; + + MCU_cols = srcinfo->output_width / + (dstinfo->max_h_samp_factor * dstinfo->min_DCT_h_scaled_size); + MCU_rows = srcinfo->output_height / + (dstinfo->max_v_samp_factor * dstinfo->min_DCT_v_scaled_size); + + for (ci = 0; ci < dstinfo->num_components; ci++) { + compptr = dstinfo->comp_info + ci; + comp_width = MCU_cols * compptr->h_samp_factor; + comp_height = MCU_rows * compptr->v_samp_factor; + x_crop_blocks = x_crop_offset * compptr->h_samp_factor; + y_crop_blocks = y_crop_offset * compptr->v_samp_factor; + for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; + dst_blk_y += compptr->v_samp_factor) { + dst_buffer = (*srcinfo->mem->access_virt_barray) + ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y, + (JDIMENSION) compptr->v_samp_factor, TRUE); + if (dstinfo->jpeg_height > srcinfo->output_height) { + if (dst_blk_y < y_crop_blocks || + dst_blk_y >= y_crop_blocks + comp_height) { + for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { + FMEMZERO(dst_buffer[offset_y], + compptr->width_in_blocks * SIZEOF(JBLOCK)); + } + continue; + } + src_buffer = (*srcinfo->mem->access_virt_barray) + ((j_common_ptr) srcinfo, src_coef_arrays[ci], + dst_blk_y - y_crop_blocks, + (JDIMENSION) compptr->v_samp_factor, FALSE); + } else { + src_buffer = (*srcinfo->mem->access_virt_barray) + ((j_common_ptr) srcinfo, src_coef_arrays[ci], + dst_blk_y + y_crop_blocks, + (JDIMENSION) compptr->v_samp_factor, FALSE); + } + for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { + if (x_crop_blocks > 0) { + FMEMZERO(dst_buffer[offset_y], + x_crop_blocks * SIZEOF(JBLOCK)); + dc = src_buffer[offset_y][0][0]; + for (dst_blk_x = 0; dst_blk_x < x_crop_blocks; dst_blk_x++) { + dst_buffer[offset_y][dst_blk_x][0] = dc; + } + } + jcopy_block_row(src_buffer[offset_y], + dst_buffer[offset_y] + x_crop_blocks, + comp_width); + if (compptr->width_in_blocks > x_crop_blocks + comp_width) { + FMEMZERO(dst_buffer[offset_y] + + x_crop_blocks + comp_width, + (compptr->width_in_blocks - + x_crop_blocks - comp_width) * SIZEOF(JBLOCK)); + dc = src_buffer[offset_y][comp_width - 1][0]; + for (dst_blk_x = x_crop_blocks + comp_width; + dst_blk_x < compptr->width_in_blocks; dst_blk_x++) { + dst_buffer[offset_y][dst_blk_x][0] = dc; + } + } + } + } + } +} + + +LOCAL(void) +do_crop_ext_reflect (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, + JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, + jvirt_barray_ptr *src_coef_arrays, + jvirt_barray_ptr *dst_coef_arrays) +/* Crop. This is only used when no rotate/flip is requested with the crop. + * Extension: The destination width is larger than the source and we fill in + * the extra area with repeated reflections of the source region. Note we + * also have to fill partial iMCUs at the right and bottom edge of the source + * image area in this case. + */ +{ + JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height, src_blk_x; + JDIMENSION dst_blk_x, dst_blk_y, x_crop_blocks, y_crop_blocks; + int ci, k, offset_y; + JBLOCKARRAY src_buffer, dst_buffer; + JBLOCKROW src_row_ptr, dst_row_ptr; + JCOEFPTR src_ptr, dst_ptr; + jpeg_component_info *compptr; + + MCU_cols = srcinfo->output_width / + (dstinfo->max_h_samp_factor * dstinfo->min_DCT_h_scaled_size); + MCU_rows = srcinfo->output_height / + (dstinfo->max_v_samp_factor * dstinfo->min_DCT_v_scaled_size); + + for (ci = 0; ci < dstinfo->num_components; ci++) { + compptr = dstinfo->comp_info + ci; + comp_width = MCU_cols * compptr->h_samp_factor; + comp_height = MCU_rows * compptr->v_samp_factor; + x_crop_blocks = x_crop_offset * compptr->h_samp_factor; + y_crop_blocks = y_crop_offset * compptr->v_samp_factor; + for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks; + dst_blk_y += compptr->v_samp_factor) { + dst_buffer = (*srcinfo->mem->access_virt_barray) + ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y, + (JDIMENSION) compptr->v_samp_factor, TRUE); + if (dstinfo->jpeg_height > srcinfo->output_height) { + if (dst_blk_y < y_crop_blocks || + dst_blk_y >= y_crop_blocks + comp_height) { + for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { + FMEMZERO(dst_buffer[offset_y], + compptr->width_in_blocks * SIZEOF(JBLOCK)); + } + continue; + } + src_buffer = (*srcinfo->mem->access_virt_barray) + ((j_common_ptr) srcinfo, src_coef_arrays[ci], + dst_blk_y - y_crop_blocks, + (JDIMENSION) compptr->v_samp_factor, FALSE); + } else { + src_buffer = (*srcinfo->mem->access_virt_barray) + ((j_common_ptr) srcinfo, src_coef_arrays[ci], + dst_blk_y + y_crop_blocks, + (JDIMENSION) compptr->v_samp_factor, FALSE); + } + for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { + /* Copy source region */ + jcopy_block_row(src_buffer[offset_y], + dst_buffer[offset_y] + x_crop_blocks, + comp_width); + if (x_crop_blocks > 0) { + /* Reflect to left */ + dst_row_ptr = dst_buffer[offset_y] + x_crop_blocks; + for (dst_blk_x = x_crop_blocks; dst_blk_x > 0;) { + src_row_ptr = dst_row_ptr; /* (re)set axis of reflection */ + for (src_blk_x = comp_width; src_blk_x > 0 && dst_blk_x > 0; + src_blk_x--, dst_blk_x--) { + dst_ptr = *--dst_row_ptr; /* destination goes left */ + src_ptr = *src_row_ptr++; /* source goes right */ + /* this unrolled loop doesn't need to know which row it's on... */ + for (k = 0; k < DCTSIZE2; k += 2) { + *dst_ptr++ = *src_ptr++; /* copy even column */ + *dst_ptr++ = - *src_ptr++; /* copy odd column with sign change */ + } + } + } + } + if (compptr->width_in_blocks > x_crop_blocks + comp_width) { + /* Reflect to right */ + dst_row_ptr = dst_buffer[offset_y] + x_crop_blocks + comp_width; + for (dst_blk_x = compptr->width_in_blocks - x_crop_blocks - comp_width; + dst_blk_x > 0;) { + src_row_ptr = dst_row_ptr; /* (re)set axis of reflection */ + for (src_blk_x = comp_width; src_blk_x > 0 && dst_blk_x > 0; + src_blk_x--, dst_blk_x--) { + dst_ptr = *dst_row_ptr++; /* destination goes right */ + src_ptr = *--src_row_ptr; /* source goes left */ + /* this unrolled loop doesn't need to know which row it's on... */ + for (k = 0; k < DCTSIZE2; k += 2) { + *dst_ptr++ = *src_ptr++; /* copy even column */ + *dst_ptr++ = - *src_ptr++; /* copy odd column with sign change */ + } + } + } + } + } + } + } +} + + +LOCAL(void) do_wipe (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, JDIMENSION x_crop_offset, JDIMENSION y_crop_offset, jvirt_barray_ptr *src_coef_arrays, @@ -275,6 +729,78 @@ do_flatten (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, LOCAL(void) +do_reflect (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, + JDIMENSION x_crop_offset, + jvirt_barray_ptr *src_coef_arrays, + JDIMENSION drop_width, JDIMENSION drop_height) +/* Reflect - drop content of specified area, similar to wipe, but + * fill with repeated reflections of the outside area, instead of zero. + * NB: y_crop_offset is assumed to be zero. + */ +{ + JDIMENSION x_wipe_blocks, wipe_width; + JDIMENSION y_wipe_blocks, wipe_bottom; + JDIMENSION src_blk_x, dst_blk_x; + int ci, k, offset_y; + JBLOCKARRAY buffer; + JBLOCKROW src_row_ptr, dst_row_ptr; + JCOEFPTR src_ptr, dst_ptr; + jpeg_component_info *compptr; + + for (ci = 0; ci < dstinfo->num_components; ci++) { + compptr = dstinfo->comp_info + ci; + x_wipe_blocks = x_crop_offset * compptr->h_samp_factor; + wipe_width = drop_width * compptr->h_samp_factor; + wipe_bottom = drop_height * compptr->v_samp_factor; + for (y_wipe_blocks = 0; y_wipe_blocks < wipe_bottom; + y_wipe_blocks += compptr->v_samp_factor) { + buffer = (*srcinfo->mem->access_virt_barray) + ((j_common_ptr) srcinfo, src_coef_arrays[ci], y_wipe_blocks, + (JDIMENSION) compptr->v_samp_factor, TRUE); + for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) { + if (x_wipe_blocks > 0) { + /* Reflect from left */ + dst_row_ptr = buffer[offset_y] + x_wipe_blocks; + for (dst_blk_x = wipe_width; dst_blk_x > 0;) { + src_row_ptr = dst_row_ptr; /* (re)set axis of reflection */ + for (src_blk_x = x_wipe_blocks; + src_blk_x > 0 && dst_blk_x > 0; src_blk_x--, dst_blk_x--) { + dst_ptr = *dst_row_ptr++; /* destination goes right */ + src_ptr = *--src_row_ptr; /* source goes left */ + /* this unrolled loop doesn't need to know which row it's on... */ + for (k = 0; k < DCTSIZE2; k += 2) { + *dst_ptr++ = *src_ptr++; /* copy even column */ + *dst_ptr++ = - *src_ptr++; /* copy odd column with sign change */ + } + } + } + } else if (compptr->width_in_blocks > x_wipe_blocks + wipe_width) { + /* Reflect from right */ + dst_row_ptr = buffer[offset_y] + x_wipe_blocks + wipe_width; + for (dst_blk_x = wipe_width; dst_blk_x > 0;) { + src_row_ptr = dst_row_ptr; /* (re)set axis of reflection */ + src_blk_x = compptr->width_in_blocks - x_wipe_blocks - wipe_width; + for (; src_blk_x > 0 && dst_blk_x > 0; src_blk_x--, dst_blk_x--) { + dst_ptr = *--dst_row_ptr; /* destination goes left */ + src_ptr = *src_row_ptr++; /* source goes right */ + /* this unrolled loop doesn't need to know which row it's on... */ + for (k = 0; k < DCTSIZE2; k += 2) { + *dst_ptr++ = *src_ptr++; /* copy even column */ + *dst_ptr++ = - *src_ptr++; /* copy odd column with sign change */ + } + } + } + } else { + FMEMZERO(buffer[offset_y] + x_wipe_blocks, + wipe_width * SIZEOF(JBLOCK)); + } + } + } + } +} + + +LOCAL(void) do_flip_h_no_crop (j_decompress_ptr srcinfo, j_compress_ptr dstinfo, JDIMENSION x_crop_offset, jvirt_barray_ptr *src_coef_arrays) @@ -932,7 +1458,7 @@ jt_read_integer (const char ** strptr, JDIMENSION * result) * The routine returns TRUE if the spec string is valid, FALSE if not. * * The crop spec string should have the format - * <width>[f]x<height>[f]{+-}<xoffset>{+-}<yoffset> + * <width>[{fr}]x<height>[{fr}]{+-}<xoffset>{+-}<yoffset> * where width, height, xoffset, and yoffset are unsigned integers. * Each of the elements can be omitted to indicate a default value. * (A weakness of this style is that it is not possible to omit xoffset @@ -957,6 +1483,9 @@ jtransform_parse_crop_spec (jpeg_transform_info *info, const char *spec) if (*spec == 'f' || *spec == 'F') { spec++; info->crop_width_set = JCROP_FORCE; + } else if (*spec == 'r' || *spec == 'R') { + spec++; + info->crop_width_set = JCROP_REFLECT; } else info->crop_width_set = JCROP_POS; } @@ -968,6 +1497,9 @@ jtransform_parse_crop_spec (jpeg_transform_info *info, const char *spec) if (*spec == 'f' || *spec == 'F') { spec++; info->crop_height_set = JCROP_FORCE; + } else if (*spec == 'r' || *spec == 'R') { + spec++; + info->crop_height_set = JCROP_REFLECT; } else info->crop_height_set = JCROP_POS; } @@ -1042,10 +1574,10 @@ jtransform_request_workspace (j_decompress_ptr srcinfo, jvirt_barray_ptr *coef_arrays; boolean need_workspace, transpose_it; jpeg_component_info *compptr; - JDIMENSION xoffset, yoffset; + JDIMENSION xoffset, yoffset, dtemp; JDIMENSION width_in_iMCUs, height_in_iMCUs; JDIMENSION width_in_blocks, height_in_blocks; - int ci, h_samp_factor, v_samp_factor; + int itemp, ci, h_samp_factor, v_samp_factor; /* Determine number of components in output image */ if (info->force_grayscale && @@ -1115,7 +1647,6 @@ jtransform_request_workspace (j_decompress_ptr srcinfo, info->iMCU_sample_height = srcinfo->max_v_samp_factor * srcinfo->min_DCT_v_scaled_size; } - break; } /* If cropping has been requested, compute the crop area's position and @@ -1179,7 +1710,54 @@ jtransform_request_workspace (j_decompress_ptr srcinfo, else yoffset = info->output_height - info->crop_height - info->crop_yoffset; /* Now adjust so that upper left corner falls at an iMCU boundary */ - if (info->transform == JXFORM_WIPE) { + switch (info->transform) { + case JXFORM_DROP: + /* Ensure the effective drop region will not exceed the requested */ + itemp = info->iMCU_sample_width; + dtemp = itemp - 1 - ((xoffset + itemp - 1) % itemp); + xoffset += dtemp; + if (info->crop_width <= dtemp) + info->drop_width = 0; + else if (xoffset + info->crop_width - dtemp == info->output_width) + /* Matching right edge: include partial iMCU */ + info->drop_width = (info->crop_width - dtemp + itemp - 1) / itemp; + else + info->drop_width = (info->crop_width - dtemp) / itemp; + itemp = info->iMCU_sample_height; + dtemp = itemp - 1 - ((yoffset + itemp - 1) % itemp); + yoffset += dtemp; + if (info->crop_height <= dtemp) + info->drop_height = 0; + else if (yoffset + info->crop_height - dtemp == info->output_height) + /* Matching bottom edge: include partial iMCU */ + info->drop_height = (info->crop_height - dtemp + itemp - 1) / itemp; + else + info->drop_height = (info->crop_height - dtemp) / itemp; + /* Check if sampling factors match for dropping */ + if (info->drop_width != 0 && info->drop_height != 0) + for (ci = 0; ci < info->num_components && + ci < info->drop_ptr->num_components; ci++) { + if (info->drop_ptr->comp_info[ci].h_samp_factor * + srcinfo->max_h_samp_factor != + srcinfo->comp_info[ci].h_samp_factor * + info->drop_ptr->max_h_samp_factor) + ERREXIT6(srcinfo, JERR_BAD_DROP_SAMPLING, ci, + info->drop_ptr->comp_info[ci].h_samp_factor, + info->drop_ptr->max_h_samp_factor, + srcinfo->comp_info[ci].h_samp_factor, + srcinfo->max_h_samp_factor, 'h'); + if (info->drop_ptr->comp_info[ci].v_samp_factor * + srcinfo->max_v_samp_factor != + srcinfo->comp_info[ci].v_samp_factor * + info->drop_ptr->max_v_samp_factor) + ERREXIT6(srcinfo, JERR_BAD_DROP_SAMPLING, ci, + info->drop_ptr->comp_info[ci].v_samp_factor, + info->drop_ptr->max_v_samp_factor, + srcinfo->comp_info[ci].v_samp_factor, + srcinfo->max_v_samp_factor, 'v'); + } + break; + case JXFORM_WIPE: /* Ensure the effective wipe region will cover the requested */ info->drop_width = (JDIMENSION) jdiv_round_up ((long) (info->crop_width + (xoffset % info->iMCU_sample_width)), @@ -1187,7 +1765,8 @@ jtransform_request_workspace (j_decompress_ptr srcinfo, info->drop_height = (JDIMENSION) jdiv_round_up ((long) (info->crop_height + (yoffset % info->iMCU_sample_height)), (long) info->iMCU_sample_height); - } else { + break; + default: /* Ensure the effective crop region will cover the requested */ if (info->crop_width_set == JCROP_FORCE || info->crop_width > info->output_width) @@ -1275,6 +1854,11 @@ jtransform_request_workspace (j_decompress_ptr srcinfo, break; case JXFORM_WIPE: break; + case JXFORM_DROP: +#if DROP_REQUEST_FROM_SRC + drop_request_from_src(info->drop_ptr, srcinfo); +#endif + break; } /* Allocate workspace if needed. @@ -1282,15 +1866,13 @@ jtransform_request_workspace (j_decompress_ptr srcinfo, * so that transform routines need not worry about missing edge blocks. */ if (need_workspace) { - coef_arrays = (jvirt_barray_ptr *) - (*srcinfo->mem->alloc_small) ((j_common_ptr) srcinfo, JPOOL_IMAGE, - SIZEOF(jvirt_barray_ptr) * info->num_components); - width_in_iMCUs = (JDIMENSION) - jdiv_round_up((long) info->output_width, - (long) info->iMCU_sample_width); - height_in_iMCUs = (JDIMENSION) - jdiv_round_up((long) info->output_height, - (long) info->iMCU_sample_height); + coef_arrays = (jvirt_barray_ptr *) (*srcinfo->mem->alloc_small) + ((j_common_ptr) srcinfo, JPOOL_IMAGE, + SIZEOF(jvirt_barray_ptr) * info->num_components); + width_in_iMCUs = (JDIMENSION) jdiv_round_up + ((long) info->output_width, (long) info->iMCU_sample_width); + height_in_iMCUs = (JDIMENSION) jdiv_round_up + ((long) info->output_height, (long) info->iMCU_sample_height); for (ci = 0; ci < info->num_components; ci++) { compptr = srcinfo->comp_info + ci; if (info->num_components == 1) { @@ -1574,7 +2156,7 @@ jtransform_adjust_parameters (j_decompress_ptr srcinfo, dstinfo->jpeg_width = info->output_width; dstinfo->jpeg_height = info->output_height; - /* Transpose destination image parameters */ + /* Transpose destination image parameters, adjust quantization */ switch (info->transform) { case JXFORM_TRANSPOSE: case JXFORM_TRANSVERSE: @@ -1582,6 +2164,12 @@ jtransform_adjust_parameters (j_decompress_ptr srcinfo, case JXFORM_ROT_270: transpose_critical_parameters(dstinfo); break; + case JXFORM_DROP: + if (info->drop_width != 0 && info->drop_height != 0) + adjust_quant(srcinfo, src_coef_arrays, + info->drop_ptr, info->drop_coef_arrays, + info->trim, dstinfo); + break; default: break; } @@ -1637,10 +2225,22 @@ jtransform_execute_transform (j_decompress_ptr srcinfo, switch (info->transform) { case JXFORM_NONE: if (info->output_width > srcinfo->output_width || - info->output_height > srcinfo->output_height) - do_crop_ext(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, - src_coef_arrays, dst_coef_arrays); - else if (info->x_crop_offset != 0 || info->y_crop_offset != 0) + info->output_height > srcinfo->output_height) { + if (info->output_width > srcinfo->output_width && + info->crop_width_set == JCROP_REFLECT) + do_crop_ext_reflect(srcinfo, dstinfo, + info->x_crop_offset, info->y_crop_offset, + src_coef_arrays, dst_coef_arrays); + else if (info->output_width > srcinfo->output_width && + info->crop_width_set == JCROP_FORCE) + do_crop_ext_flat(srcinfo, dstinfo, + info->x_crop_offset, info->y_crop_offset, + src_coef_arrays, dst_coef_arrays); + else + do_crop_ext_zero(srcinfo, dstinfo, + info->x_crop_offset, info->y_crop_offset, + src_coef_arrays, dst_coef_arrays); + } else if (info->x_crop_offset != 0 || info->y_crop_offset != 0) do_crop(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, src_coef_arrays, dst_coef_arrays); break; @@ -1677,12 +2277,28 @@ jtransform_execute_transform (j_decompress_ptr srcinfo, src_coef_arrays, dst_coef_arrays); break; case JXFORM_WIPE: - if (info->crop_width_set != JCROP_FORCE) - do_wipe(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, - src_coef_arrays, info->drop_width, info->drop_height); - else + if (info->crop_width_set == JCROP_REFLECT && + info->y_crop_offset == 0 && info->drop_height == + (JDIMENSION) jdiv_round_up + ((long) info->output_height, (long) info->iMCU_sample_height) && + (info->x_crop_offset == 0 || + info->x_crop_offset + info->drop_width == + (JDIMENSION) jdiv_round_up + ((long) info->output_width, (long) info->iMCU_sample_width))) + do_reflect(srcinfo, dstinfo, info->x_crop_offset, + src_coef_arrays, info->drop_width, info->drop_height); + else if (info->crop_width_set == JCROP_FORCE) do_flatten(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, src_coef_arrays, info->drop_width, info->drop_height); + else + do_wipe(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, + src_coef_arrays, info->drop_width, info->drop_height); + break; + case JXFORM_DROP: + if (info->drop_width != 0 && info->drop_height != 0) + do_drop(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset, + src_coef_arrays, info->drop_ptr, info->drop_coef_arrays, + info->drop_width, info->drop_height); break; } } |