+++ /dev/null
-#! /bin/sh -e
-
-# DP: Lossless-crop patch from <http://sylvana.net/jpegcrop/croppatch.tar.gz>
-# DP: by <guido@jpegclub.org>.
-
-case "$1" in
- -patch) patch -f --no-backup-if-mismatch -p1 < $0;;
- -unpatch) patch -f --no-backup-if-mismatch -R -p1 < $0;;
- *)
- echo >&2 "`basename $0`: script expects -patch|-unpatch as argument"
- exit 1
-esac
-exit 0
-@DPATCH@
-diff -urNad /home/bill/debian/libjpeg/libjpeg6b-6b/jerror.h libjpeg6b-6b/jerror.h
---- /home/bill/debian/libjpeg/libjpeg6b-6b/jerror.h 2003-09-22 18:15:48.000000000 +0200
-+++ libjpeg6b-6b/jerror.h 2003-09-22 18:16:12.000000000 +0200
-@@ -45,6 +45,7 @@
- JMESSAGE(JERR_BAD_ALLOC_CHUNK, "MAX_ALLOC_CHUNK is wrong, please fix")
- JMESSAGE(JERR_BAD_BUFFER_MODE, "Bogus buffer control mode")
- JMESSAGE(JERR_BAD_COMPONENT_ID, "Invalid component ID %d in SOS")
-+JMESSAGE(JERR_BAD_CROP_SPEC, "Invalid crop request")
- JMESSAGE(JERR_BAD_DCT_COEF, "DCT coefficient out of range")
- JMESSAGE(JERR_BAD_DCTSIZE, "IDCT output block size %d not supported")
- JMESSAGE(JERR_BAD_HUFF_TABLE, "Bogus Huffman table definition")
-diff -urNad /home/bill/debian/libjpeg/libjpeg6b-6b/jpegtran.c libjpeg6b-6b/jpegtran.c
---- /home/bill/debian/libjpeg/libjpeg6b-6b/jpegtran.c 2003-09-22 18:15:48.000000000 +0200
-+++ libjpeg6b-6b/jpegtran.c 2003-09-22 18:16:22.000000000 +0200
-@@ -1,7 +1,7 @@
- /*
- * jpegtran.c
- *
-- * Copyright (C) 1995-1997, Thomas G. Lane.
-+ * Copyright (C) 1995-2001, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
-@@ -64,8 +64,10 @@
- #endif
- #if TRANSFORMS_SUPPORTED
- fprintf(stderr, "Switches for modifying the image:\n");
-+ fprintf(stderr, " -crop WxH+X+Y Crop to a rectangular subarea\n");
- fprintf(stderr, " -grayscale Reduce to grayscale (omit color data)\n");
- fprintf(stderr, " -flip [horizontal|vertical] Mirror image (left-right or top-bottom)\n");
-+ fprintf(stderr, " -perfect Fail if there is non-transformable edge blocks\n");
- fprintf(stderr, " -rotate [90|180|270] Rotate image (degrees clockwise)\n");
- fprintf(stderr, " -transpose Transpose image\n");
- fprintf(stderr, " -transverse Transverse transpose image\n");
-@@ -133,7 +135,9 @@
- copyoption = JCOPYOPT_DEFAULT;
- transformoption.transform = JXFORM_NONE;
- transformoption.trim = FALSE;
-+ transformoption.perfect = FALSE;
- transformoption.force_grayscale = FALSE;
-+ transformoption.crop = FALSE;
- cinfo->err->trace_level = 0;
-
- /* Scan command line options, adjust parameters */
-@@ -160,7 +164,7 @@
- exit(EXIT_FAILURE);
- #endif
-
-- } else if (keymatch(arg, "copy", 1)) {
-+ } else if (keymatch(arg, "copy", 2)) {
- /* Select which extra markers to copy. */
- if (++argn >= argc) /* advance to next argument */
- usage();
-@@ -173,6 +177,20 @@
- } else
- usage();
-
-+ } else if (keymatch(arg, "crop", 2)) {
-+ /* Perform lossless cropping. */
-+#if TRANSFORMS_SUPPORTED
-+ if (++argn >= argc) /* advance to next argument */
-+ usage();
-+ if (! jtransform_parse_crop_spec(&transformoption, argv[argn])) {
-+ fprintf(stderr, "%s: bogus -crop argument '%s'\n",
-+ progname, argv[argn]);
-+ exit(EXIT_FAILURE);
-+ }
-+#else
-+ select_transform(JXFORM_NONE); /* force an error */
-+#endif
-+
- } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
- /* Enable debug printouts. */
- /* On first -d, print version identification */
-@@ -233,7 +251,12 @@
- usage();
- outfilename = argv[argn]; /* save it away for later use */
-
-- } else if (keymatch(arg, "progressive", 1)) {
-+ } else if (keymatch(arg, "perfect", 2)) {
-+ /* Fail if there is any partial edge MCUs that the transform can't
-+ * handle. */
-+ transformoption.perfect = TRUE;
-+
-+ } else if (keymatch(arg, "progressive", 2)) {
- /* Select simple progressive mode. */
- #ifdef C_PROGRESSIVE_SUPPORTED
- simple_progressive = TRUE;
-@@ -342,8 +365,10 @@
- jvirt_barray_ptr * src_coef_arrays;
- jvirt_barray_ptr * dst_coef_arrays;
- int file_index;
-- FILE * input_file;
-- FILE * output_file;
-+ /* We assume all-in-memory processing and can therefore use only a
-+ * single file pointer for sequential input and output operation.
-+ */
-+ FILE * fp;
-
- /* On Mac, fetch a command line. */
- #ifdef USE_CCOMMAND
-@@ -406,24 +431,13 @@
-
- /* Open the input file. */
- if (file_index < argc) {
-- if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
-- fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
-+ if ((fp = fopen(argv[file_index], READ_BINARY)) == NULL) {
-+ fprintf(stderr, "%s: can't open %s for reading\n", progname, argv[file_index]);
- exit(EXIT_FAILURE);
- }
- } else {
- /* default input file is stdin */
-- input_file = read_stdin();
-- }
--
-- /* Open the output file. */
-- if (outfilename != NULL) {
-- if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
-- fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
-- exit(EXIT_FAILURE);
-- }
-- } else {
-- /* default output file is stdout */
-- output_file = write_stdout();
-+ fp = read_stdin();
- }
-
- #ifdef PROGRESS_REPORT
-@@ -431,7 +445,7 @@
- #endif
-
- /* Specify data source for decompression */
-- jpeg_stdio_src(&srcinfo, input_file);
-+ jpeg_stdio_src(&srcinfo, fp);
-
- /* Enable saving of extra markers that we want to copy */
- jcopy_markers_setup(&srcinfo, copyoption);
-@@ -443,6 +457,15 @@
- * jpeg_read_coefficients so that memory allocation will be done right.
- */
- #if TRANSFORMS_SUPPORTED
-+ /* Fails right away if -perfect is given and transformation is not perfect.
-+ */
-+ if (transformoption.perfect &&
-+ !jtransform_perfect_transform(srcinfo.image_width, srcinfo.image_height,
-+ srcinfo.max_h_samp_factor * DCTSIZE, srcinfo.max_v_samp_factor * DCTSIZE,
-+ transformoption.transform)) {
-+ fprintf(stderr, "%s: transformation is not perfect\n", progname);
-+ exit(EXIT_FAILURE);
-+ }
- jtransform_request_workspace(&srcinfo, &transformoption);
- #endif
-
-@@ -463,11 +486,32 @@
- dst_coef_arrays = src_coef_arrays;
- #endif
-
-+ /* Close input file, if we opened it.
-+ * Note: we assume that jpeg_read_coefficients consumed all input
-+ * until JPEG_REACHED_EOI, and that jpeg_finish_decompress will
-+ * only consume more while (! cinfo->inputctl->eoi_reached).
-+ * We cannot call jpeg_finish_decompress here since we still need the
-+ * virtual arrays allocated from the source object for processing.
-+ */
-+ if (fp != stdin)
-+ fclose(fp);
-+
-+ /* Open the output file. */
-+ if (outfilename != NULL) {
-+ if ((fp = fopen(outfilename, WRITE_BINARY)) == NULL) {
-+ fprintf(stderr, "%s: can't open %s for writing\n", progname, outfilename);
-+ exit(EXIT_FAILURE);
-+ }
-+ } else {
-+ /* default output file is stdout */
-+ fp = write_stdout();
-+ }
-+
- /* Adjust default compression parameters by re-parsing the options */
- file_index = parse_switches(&dstinfo, argc, argv, 0, TRUE);
-
- /* Specify data destination for compression */
-- jpeg_stdio_dest(&dstinfo, output_file);
-+ jpeg_stdio_dest(&dstinfo, fp);
-
- /* Start compressor (note no image data is actually written here) */
- jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
-@@ -488,11 +532,9 @@
- (void) jpeg_finish_decompress(&srcinfo);
- jpeg_destroy_decompress(&srcinfo);
-
-- /* Close files, if we opened them */
-- if (input_file != stdin)
-- fclose(input_file);
-- if (output_file != stdout)
-- fclose(output_file);
-+ /* Close output file, if we opened it */
-+ if (fp != stdout)
-+ fclose(fp);
-
- #ifdef PROGRESS_REPORT
- end_progress_monitor((j_common_ptr) &dstinfo);
-diff -urNad /home/bill/debian/libjpeg/libjpeg6b-6b/transupp.c libjpeg6b-6b/transupp.c
---- /home/bill/debian/libjpeg/libjpeg6b-6b/transupp.c 2003-09-22 18:15:49.000000000 +0200
-+++ libjpeg6b-6b/transupp.c 2003-09-22 18:16:28.000000000 +0200
-@@ -1,7 +1,7 @@
- /*
- * transupp.c
- *
-- * Copyright (C) 1997, Thomas G. Lane.
-+ * Copyright (C) 1997-2001, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
-@@ -20,6 +20,7 @@
- #include "jinclude.h"
- #include "jpeglib.h"
- #include "transupp.h" /* My own external interface */
-+#include <ctype.h> /* to declare isdigit() */
-
-
- #if TRANSFORMS_SUPPORTED
-@@ -28,7 +29,8 @@
- * Lossless image transformation routines. These routines work on DCT
- * coefficient arrays and thus do not require any lossy decompression
- * or recompression of the image.
-- * Thanks to Guido Vollbeding for the initial design and code of this feature.
-+ * Thanks to Guido Vollbeding for the initial design and code of this feature,
-+ * and to Ben Jackson for introducing the cropping feature.
- *
- * Horizontal flipping is done in-place, using a single top-to-bottom
- * pass through the virtual source array. It will thus be much the
-@@ -42,6 +44,13 @@
- * arrays for most of the transforms. That could result in much thrashing
- * if the image is larger than main memory.
- *
-+ * If cropping or trimming is involved, the destination arrays may be smaller
-+ * than the source arrays. Note it is not possible to do horizontal flip
-+ * in-place when a nonzero Y crop offset is specified, since we'd have to move
-+ * data from one block row to another but the virtual array manager doesn't
-+ * guarantee we can touch more than one row at a time. So in that case,
-+ * we have to use a separate destination array.
-+ *
- * Some notes about the operating environment of the individual transform
- * routines:
- * 1. Both the source and destination virtual arrays are allocated from the
-@@ -54,20 +63,65 @@
- * and we may as well take that as the effective iMCU size.
- * 4. When "trim" is in effect, the destination's dimensions will be the
- * trimmed values but the source's will be untrimmed.
-- * 5. All the routines assume that the source and destination buffers are
-+ * 5. When "crop" is in effect, the destination's dimensions will be the
-+ * cropped values but the source's will be uncropped. Each transform
-+ * routine is responsible for picking up source data starting at the
-+ * correct X and Y offset for the crop region. (The X and Y offsets
-+ * passed to the transform routines are measured in iMCU blocks of the
-+ * destination.)
-+ * 6. All the routines assume that the source and destination buffers are
- * padded out to a full iMCU boundary. This is true, although for the
- * source buffer it is an undocumented property of jdcoefct.c.
-- * Notes 2,3,4 boil down to this: generally we should use the destination's
-- * dimensions and ignore the source's.
- */
-
-
- LOCAL(void)
--do_flip_h (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
-- jvirt_barray_ptr *src_coef_arrays)
--/* Horizontal flip; done in-place, so no separate dest array is required */
-+do_crop (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. */
- {
-- JDIMENSION MCU_cols, comp_width, blk_x, blk_y;
-+ JDIMENSION dst_blk_y, x_crop_blocks, y_crop_blocks;
-+ int ci, offset_y;
-+ JBLOCKARRAY src_buffer, dst_buffer;
-+ jpeg_component_info *compptr;
-+
-+ /* We simply have to copy the right amount of data (the destination's
-+ * image size) starting at the given X and Y offsets in the source.
-+ */
-+ for (ci = 0; ci < dstinfo->num_components; ci++) {
-+ compptr = dstinfo->comp_info + ci;
-+ 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);
-+ 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++) {
-+ jcopy_block_row(src_buffer[offset_y] + x_crop_blocks,
-+ dst_buffer[offset_y],
-+ compptr->width_in_blocks);
-+ }
-+ }
-+ }
-+}
-+
-+
-+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)
-+/* Horizontal flip; done in-place, so no separate dest array is required.
-+ * NB: this only works when y_crop_offset is zero.
-+ */
-+{
-+ JDIMENSION MCU_cols, comp_width, blk_x, blk_y, x_crop_blocks;
- int ci, k, offset_y;
- JBLOCKARRAY buffer;
- JCOEFPTR ptr1, ptr2;
-@@ -79,17 +133,19 @@
- * mirroring by changing the signs of odd-numbered columns.
- * Partial iMCUs at the right edge are left untouched.
- */
-- MCU_cols = dstinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE);
-+ MCU_cols = srcinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE);
-
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- comp_width = MCU_cols * compptr->h_samp_factor;
-+ x_crop_blocks = x_crop_offset * compptr->h_samp_factor;
- for (blk_y = 0; blk_y < compptr->height_in_blocks;
- blk_y += compptr->v_samp_factor) {
- buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci], blk_y,
- (JDIMENSION) compptr->v_samp_factor, TRUE);
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
-+ /* Do the mirroring */
- for (blk_x = 0; blk_x * 2 < comp_width; blk_x++) {
- ptr1 = buffer[offset_y][blk_x];
- ptr2 = buffer[offset_y][comp_width - blk_x - 1];
-@@ -105,6 +161,79 @@
- *ptr2++ = -temp1;
- }
- }
-+ if (x_crop_blocks > 0) {
-+ /* Now left-justify the portion of the data to be kept.
-+ * We can't use a single jcopy_block_row() call because that routine
-+ * depends on memcpy(), whose behavior is unspecified for overlapping
-+ * source and destination areas. Sigh.
-+ */
-+ for (blk_x = 0; blk_x < compptr->width_in_blocks; blk_x++) {
-+ jcopy_block_row(buffer[offset_y] + blk_x + x_crop_blocks,
-+ buffer[offset_y] + blk_x,
-+ (JDIMENSION) 1);
-+ }
-+ }
-+ }
-+ }
-+ }
-+}
-+
-+
-+LOCAL(void)
-+do_flip_h (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)
-+/* Horizontal flip in general cropping case */
-+{
-+ JDIMENSION MCU_cols, comp_width, dst_blk_x, dst_blk_y;
-+ JDIMENSION 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;
-+
-+ /* Here we must output into a separate array because we can't touch
-+ * different rows of a single virtual array simultaneously. Otherwise,
-+ * this is essentially the same as the routine above.
-+ */
-+ MCU_cols = srcinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE);
-+
-+ for (ci = 0; ci < dstinfo->num_components; ci++) {
-+ compptr = dstinfo->comp_info + ci;
-+ comp_width = MCU_cols * compptr->h_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);
-+ 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++) {
-+ dst_row_ptr = dst_buffer[offset_y];
-+ src_row_ptr = src_buffer[offset_y];
-+ for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; dst_blk_x++) {
-+ if (x_crop_blocks + dst_blk_x < comp_width) {
-+ /* Do the mirrorable blocks */
-+ dst_ptr = dst_row_ptr[dst_blk_x];
-+ src_ptr = src_row_ptr[comp_width - x_crop_blocks - dst_blk_x - 1];
-+ /* 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 {
-+ /* Copy last partial block(s) verbatim */
-+ jcopy_block_row(src_row_ptr + dst_blk_x + x_crop_blocks,
-+ dst_row_ptr + dst_blk_x,
-+ (JDIMENSION) 1);
-+ }
-+ }
- }
- }
- }
-@@ -113,11 +242,13 @@
-
- LOCAL(void)
- do_flip_v (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)
- /* Vertical flip */
- {
- JDIMENSION MCU_rows, comp_height, dst_blk_x, dst_blk_y;
-+ JDIMENSION x_crop_blocks, y_crop_blocks;
- int ci, i, j, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JBLOCKROW src_row_ptr, dst_row_ptr;
-@@ -131,33 +262,38 @@
- * of odd-numbered rows.
- * Partial iMCUs at the bottom edge are copied verbatim.
- */
-- MCU_rows = dstinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE);
-+ MCU_rows = srcinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE);
-
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- 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 (dst_blk_y < comp_height) {
-+ if (y_crop_blocks + dst_blk_y < comp_height) {
- /* Row is within the mirrorable area. */
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci],
-- comp_height - dst_blk_y - (JDIMENSION) compptr->v_samp_factor,
-+ comp_height - y_crop_blocks - dst_blk_y -
-+ (JDIMENSION) compptr->v_samp_factor,
- (JDIMENSION) compptr->v_samp_factor, FALSE);
- } else {
- /* Bottom-edge blocks will be copied verbatim. */
- src_buffer = (*srcinfo->mem->access_virt_barray)
-- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_y,
-+ ((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 (dst_blk_y < comp_height) {
-+ if (y_crop_blocks + dst_blk_y < comp_height) {
- /* Row is within the mirrorable area. */
- dst_row_ptr = dst_buffer[offset_y];
- src_row_ptr = src_buffer[compptr->v_samp_factor - offset_y - 1];
-+ src_row_ptr += x_crop_blocks;
- for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks;
- dst_blk_x++) {
- dst_ptr = dst_row_ptr[dst_blk_x];
-@@ -173,7 +309,8 @@
- }
- } else {
- /* Just copy row verbatim. */
-- jcopy_block_row(src_buffer[offset_y], dst_buffer[offset_y],
-+ jcopy_block_row(src_buffer[offset_y] + x_crop_blocks,
-+ dst_buffer[offset_y],
- compptr->width_in_blocks);
- }
- }
-@@ -184,11 +321,12 @@
-
- LOCAL(void)
- do_transpose (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)
- /* Transpose source into destination */
- {
-- JDIMENSION dst_blk_x, dst_blk_y;
-+ JDIMENSION dst_blk_x, dst_blk_y, x_crop_blocks, y_crop_blocks;
- int ci, i, j, offset_x, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JCOEFPTR src_ptr, dst_ptr;
-@@ -201,6 +339,8 @@
- */
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
-+ 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)
-@@ -210,11 +350,12 @@
- for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks;
- dst_blk_x += compptr->h_samp_factor) {
- src_buffer = (*srcinfo->mem->access_virt_barray)
-- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_x,
-+ ((j_common_ptr) srcinfo, src_coef_arrays[ci],
-+ dst_blk_x + x_crop_blocks,
- (JDIMENSION) compptr->h_samp_factor, FALSE);
- for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) {
-- src_ptr = src_buffer[offset_x][dst_blk_y + offset_y];
- dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
-+ src_ptr = src_buffer[offset_x][dst_blk_y + offset_y + y_crop_blocks];
- for (i = 0; i < DCTSIZE; i++)
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
-@@ -228,6 +369,7 @@
-
- LOCAL(void)
- do_rot_90 (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)
- /* 90 degree rotation is equivalent to
-@@ -237,6 +379,7 @@
- */
- {
- JDIMENSION MCU_cols, comp_width, dst_blk_x, dst_blk_y;
-+ JDIMENSION x_crop_blocks, y_crop_blocks;
- int ci, i, j, offset_x, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JCOEFPTR src_ptr, dst_ptr;
-@@ -246,11 +389,13 @@
- * at the (output) right edge properly. They just get transposed and
- * not mirrored.
- */
-- MCU_cols = dstinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE);
-+ MCU_cols = srcinfo->image_height / (dstinfo->max_h_samp_factor * DCTSIZE);
-
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- comp_width = MCU_cols * compptr->h_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)
-@@ -259,15 +404,26 @@
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
- for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks;
- dst_blk_x += compptr->h_samp_factor) {
-- src_buffer = (*srcinfo->mem->access_virt_barray)
-- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_x,
-- (JDIMENSION) compptr->h_samp_factor, FALSE);
-+ if (x_crop_blocks + dst_blk_x < comp_width) {
-+ /* Block is within the mirrorable area. */
-+ src_buffer = (*srcinfo->mem->access_virt_barray)
-+ ((j_common_ptr) srcinfo, src_coef_arrays[ci],
-+ comp_width - x_crop_blocks - dst_blk_x -
-+ (JDIMENSION) compptr->h_samp_factor,
-+ (JDIMENSION) compptr->h_samp_factor, FALSE);
-+ } else {
-+ /* Edge blocks are transposed but not mirrored. */
-+ src_buffer = (*srcinfo->mem->access_virt_barray)
-+ ((j_common_ptr) srcinfo, src_coef_arrays[ci],
-+ dst_blk_x + x_crop_blocks,
-+ (JDIMENSION) compptr->h_samp_factor, FALSE);
-+ }
- for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) {
-- src_ptr = src_buffer[offset_x][dst_blk_y + offset_y];
-- if (dst_blk_x < comp_width) {
-+ dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
-+ if (x_crop_blocks + dst_blk_x < comp_width) {
- /* Block is within the mirrorable area. */
-- dst_ptr = dst_buffer[offset_y]
-- [comp_width - dst_blk_x - offset_x - 1];
-+ src_ptr = src_buffer[compptr->h_samp_factor - offset_x - 1]
-+ [dst_blk_y + offset_y + y_crop_blocks];
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
-@@ -277,7 +433,8 @@
- }
- } else {
- /* Edge blocks are transposed but not mirrored. */
-- dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
-+ src_ptr = src_buffer[offset_x]
-+ [dst_blk_y + offset_y + y_crop_blocks];
- for (i = 0; i < DCTSIZE; i++)
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
-@@ -292,6 +449,7 @@
-
- LOCAL(void)
- do_rot_270 (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)
- /* 270 degree rotation is equivalent to
-@@ -301,6 +459,7 @@
- */
- {
- JDIMENSION MCU_rows, comp_height, dst_blk_x, dst_blk_y;
-+ JDIMENSION x_crop_blocks, y_crop_blocks;
- int ci, i, j, offset_x, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JCOEFPTR src_ptr, dst_ptr;
-@@ -310,11 +469,13 @@
- * at the (output) bottom edge properly. They just get transposed and
- * not mirrored.
- */
-- MCU_rows = dstinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE);
-+ MCU_rows = srcinfo->image_width / (dstinfo->max_v_samp_factor * DCTSIZE);
-
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- 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)
-@@ -324,14 +485,15 @@
- for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks;
- dst_blk_x += compptr->h_samp_factor) {
- src_buffer = (*srcinfo->mem->access_virt_barray)
-- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_x,
-+ ((j_common_ptr) srcinfo, src_coef_arrays[ci],
-+ dst_blk_x + x_crop_blocks,
- (JDIMENSION) compptr->h_samp_factor, FALSE);
- for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) {
- dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
-- if (dst_blk_y < comp_height) {
-+ if (y_crop_blocks + dst_blk_y < comp_height) {
- /* Block is within the mirrorable area. */
- src_ptr = src_buffer[offset_x]
-- [comp_height - dst_blk_y - offset_y - 1];
-+ [comp_height - y_crop_blocks - dst_blk_y - offset_y - 1];
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < DCTSIZE; j++) {
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
-@@ -341,7 +503,8 @@
- }
- } else {
- /* Edge blocks are transposed but not mirrored. */
-- src_ptr = src_buffer[offset_x][dst_blk_y + offset_y];
-+ src_ptr = src_buffer[offset_x]
-+ [dst_blk_y + offset_y + y_crop_blocks];
- for (i = 0; i < DCTSIZE; i++)
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
-@@ -356,6 +519,7 @@
-
- LOCAL(void)
- do_rot_180 (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)
- /* 180 degree rotation is equivalent to
-@@ -365,89 +529,93 @@
- */
- {
- JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height, dst_blk_x, dst_blk_y;
-+ JDIMENSION x_crop_blocks, y_crop_blocks;
- int ci, i, j, 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 = dstinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE);
-- MCU_rows = dstinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE);
-+ MCU_cols = srcinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE);
-+ MCU_rows = srcinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE);
-
- 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 (dst_blk_y < comp_height) {
-+ if (y_crop_blocks + dst_blk_y < comp_height) {
- /* Row is within the vertically mirrorable area. */
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci],
-- comp_height - dst_blk_y - (JDIMENSION) compptr->v_samp_factor,
-+ comp_height - y_crop_blocks - dst_blk_y -
-+ (JDIMENSION) compptr->v_samp_factor,
- (JDIMENSION) compptr->v_samp_factor, FALSE);
- } else {
- /* Bottom-edge rows are only mirrored horizontally. */
- src_buffer = (*srcinfo->mem->access_virt_barray)
-- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_y,
-+ ((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 (dst_blk_y < comp_height) {
-+ dst_row_ptr = dst_buffer[offset_y];
-+ if (y_crop_blocks + dst_blk_y < comp_height) {
- /* Row is within the mirrorable area. */
-- dst_row_ptr = dst_buffer[offset_y];
- src_row_ptr = src_buffer[compptr->v_samp_factor - offset_y - 1];
-- /* Process the blocks that can be mirrored both ways. */
-- for (dst_blk_x = 0; dst_blk_x < comp_width; dst_blk_x++) {
-+ for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; dst_blk_x++) {
- dst_ptr = dst_row_ptr[dst_blk_x];
-- src_ptr = src_row_ptr[comp_width - dst_blk_x - 1];
-- for (i = 0; i < DCTSIZE; i += 2) {
-- /* For even row, negate every odd column. */
-- for (j = 0; j < DCTSIZE; j += 2) {
-- *dst_ptr++ = *src_ptr++;
-- *dst_ptr++ = - *src_ptr++;
-+ if (x_crop_blocks + dst_blk_x < comp_width) {
-+ /* Process the blocks that can be mirrored both ways. */
-+ src_ptr = src_row_ptr[comp_width - x_crop_blocks - dst_blk_x - 1];
-+ for (i = 0; i < DCTSIZE; i += 2) {
-+ /* For even row, negate every odd column. */
-+ for (j = 0; j < DCTSIZE; j += 2) {
-+ *dst_ptr++ = *src_ptr++;
-+ *dst_ptr++ = - *src_ptr++;
-+ }
-+ /* For odd row, negate every even column. */
-+ for (j = 0; j < DCTSIZE; j += 2) {
-+ *dst_ptr++ = - *src_ptr++;
-+ *dst_ptr++ = *src_ptr++;
-+ }
- }
-- /* For odd row, negate every even column. */
-- for (j = 0; j < DCTSIZE; j += 2) {
-- *dst_ptr++ = - *src_ptr++;
-- *dst_ptr++ = *src_ptr++;
-+ } else {
-+ /* Any remaining right-edge blocks are only mirrored vertically. */
-+ src_ptr = src_row_ptr[x_crop_blocks + dst_blk_x];
-+ for (i = 0; i < DCTSIZE; i += 2) {
-+ for (j = 0; j < DCTSIZE; j++)
-+ *dst_ptr++ = *src_ptr++;
-+ for (j = 0; j < DCTSIZE; j++)
-+ *dst_ptr++ = - *src_ptr++;
- }
- }
- }
-- /* Any remaining right-edge blocks are only mirrored vertically. */
-- for (; dst_blk_x < compptr->width_in_blocks; dst_blk_x++) {
-- dst_ptr = dst_row_ptr[dst_blk_x];
-- src_ptr = src_row_ptr[dst_blk_x];
-- for (i = 0; i < DCTSIZE; i += 2) {
-- for (j = 0; j < DCTSIZE; j++)
-- *dst_ptr++ = *src_ptr++;
-- for (j = 0; j < DCTSIZE; j++)
-- *dst_ptr++ = - *src_ptr++;
-- }
-- }
- } else {
- /* Remaining rows are just mirrored horizontally. */
-- dst_row_ptr = dst_buffer[offset_y];
- src_row_ptr = src_buffer[offset_y];
-- /* Process the blocks that can be mirrored. */
-- for (dst_blk_x = 0; dst_blk_x < comp_width; dst_blk_x++) {
-- dst_ptr = dst_row_ptr[dst_blk_x];
-- src_ptr = src_row_ptr[comp_width - dst_blk_x - 1];
-- for (i = 0; i < DCTSIZE2; i += 2) {
-- *dst_ptr++ = *src_ptr++;
-- *dst_ptr++ = - *src_ptr++;
-+ for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks; dst_blk_x++) {
-+ if (x_crop_blocks + dst_blk_x < comp_width) {
-+ /* Process the blocks that can be mirrored. */
-+ dst_ptr = dst_row_ptr[dst_blk_x];
-+ src_ptr = src_row_ptr[comp_width - x_crop_blocks - dst_blk_x - 1];
-+ for (i = 0; i < DCTSIZE2; i += 2) {
-+ *dst_ptr++ = *src_ptr++;
-+ *dst_ptr++ = - *src_ptr++;
-+ }
-+ } else {
-+ /* Any remaining right-edge blocks are only copied. */
-+ jcopy_block_row(src_row_ptr + dst_blk_x + x_crop_blocks,
-+ dst_row_ptr + dst_blk_x,
-+ (JDIMENSION) 1);
- }
- }
-- /* Any remaining right-edge blocks are only copied. */
-- for (; dst_blk_x < compptr->width_in_blocks; dst_blk_x++) {
-- dst_ptr = dst_row_ptr[dst_blk_x];
-- src_ptr = src_row_ptr[dst_blk_x];
-- for (i = 0; i < DCTSIZE2; i++)
-- *dst_ptr++ = *src_ptr++;
-- }
- }
- }
- }
-@@ -457,6 +625,7 @@
-
- LOCAL(void)
- do_transverse (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)
- /* Transverse transpose is equivalent to
-@@ -470,18 +639,21 @@
- */
- {
- JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height, dst_blk_x, dst_blk_y;
-+ JDIMENSION x_crop_blocks, y_crop_blocks;
- int ci, i, j, offset_x, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JCOEFPTR src_ptr, dst_ptr;
- jpeg_component_info *compptr;
-
-- MCU_cols = dstinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE);
-- MCU_rows = dstinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE);
-+ MCU_cols = srcinfo->image_height / (dstinfo->max_h_samp_factor * DCTSIZE);
-+ MCU_rows = srcinfo->image_width / (dstinfo->max_v_samp_factor * DCTSIZE);
-
- 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)
-@@ -490,17 +662,26 @@
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
- for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks;
- dst_blk_x += compptr->h_samp_factor) {
-- src_buffer = (*srcinfo->mem->access_virt_barray)
-- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_x,
-- (JDIMENSION) compptr->h_samp_factor, FALSE);
-+ if (x_crop_blocks + dst_blk_x < comp_width) {
-+ /* Block is within the mirrorable area. */
-+ src_buffer = (*srcinfo->mem->access_virt_barray)
-+ ((j_common_ptr) srcinfo, src_coef_arrays[ci],
-+ comp_width - x_crop_blocks - dst_blk_x -
-+ (JDIMENSION) compptr->h_samp_factor,
-+ (JDIMENSION) compptr->h_samp_factor, FALSE);
-+ } else {
-+ src_buffer = (*srcinfo->mem->access_virt_barray)
-+ ((j_common_ptr) srcinfo, src_coef_arrays[ci],
-+ dst_blk_x + x_crop_blocks,
-+ (JDIMENSION) compptr->h_samp_factor, FALSE);
-+ }
- for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) {
-- if (dst_blk_y < comp_height) {
-- src_ptr = src_buffer[offset_x]
-- [comp_height - dst_blk_y - offset_y - 1];
-- if (dst_blk_x < comp_width) {
-+ dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
-+ if (y_crop_blocks + dst_blk_y < comp_height) {
-+ if (x_crop_blocks + dst_blk_x < comp_width) {
- /* Block is within the mirrorable area. */
-- dst_ptr = dst_buffer[offset_y]
-- [comp_width - dst_blk_x - offset_x - 1];
-+ src_ptr = src_buffer[compptr->h_samp_factor - offset_x - 1]
-+ [comp_height - y_crop_blocks - dst_blk_y - offset_y - 1];
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < DCTSIZE; j++) {
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
-@@ -516,7 +697,8 @@
- }
- } else {
- /* Right-edge blocks are mirrored in y only */
-- dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
-+ src_ptr = src_buffer[offset_x]
-+ [comp_height - y_crop_blocks - dst_blk_y - offset_y - 1];
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < DCTSIZE; j++) {
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
-@@ -526,11 +708,10 @@
- }
- }
- } else {
-- src_ptr = src_buffer[offset_x][dst_blk_y + offset_y];
-- if (dst_blk_x < comp_width) {
-+ if (x_crop_blocks + dst_blk_x < comp_width) {
- /* Bottom-edge blocks are mirrored in x only */
-- dst_ptr = dst_buffer[offset_y]
-- [comp_width - dst_blk_x - offset_x - 1];
-+ src_ptr = src_buffer[compptr->h_samp_factor - offset_x - 1]
-+ [dst_blk_y + offset_y + y_crop_blocks];
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
-@@ -540,7 +721,8 @@
- }
- } else {
- /* At lower right corner, just transpose, no mirroring */
-- dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
-+ src_ptr = src_buffer[offset_x]
-+ [dst_blk_y + offset_y + y_crop_blocks];
- for (i = 0; i < DCTSIZE; i++)
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
-@@ -554,8 +736,116 @@
- }
-
-
-+/* Parse an unsigned integer: subroutine for jtransform_parse_crop_spec.
-+ * Returns TRUE if valid integer found, FALSE if not.
-+ * *strptr is advanced over the digit string, and *result is set to its value.
-+ */
-+
-+LOCAL(boolean)
-+jt_read_integer (const char ** strptr, JDIMENSION * result)
-+{
-+ const char * ptr = *strptr;
-+ JDIMENSION val = 0;
-+
-+ for (; isdigit(*ptr); ptr++) {
-+ val = val * 10 + (JDIMENSION) (*ptr - '0');
-+ }
-+ *result = val;
-+ if (ptr == *strptr)
-+ return FALSE; /* oops, no digits */
-+ *strptr = ptr;
-+ return TRUE;
-+}
-+
-+
-+/* Parse a crop specification (written in X11 geometry style).
-+ * The routine returns TRUE if the spec string is valid, FALSE if not.
-+ *
-+ * The crop spec string should have the format
-+ * <width>x<height>{+-}<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
-+ * while specifying yoffset, since they look alike.)
-+ *
-+ * This code is loosely based on XParseGeometry from the X11 distribution.
-+ */
-+
-+GLOBAL(boolean)
-+jtransform_parse_crop_spec (jpeg_transform_info *info, const char *spec)
-+{
-+ info->crop = FALSE;
-+ info->crop_width_set = JCROP_UNSET;
-+ info->crop_height_set = JCROP_UNSET;
-+ info->crop_xoffset_set = JCROP_UNSET;
-+ info->crop_yoffset_set = JCROP_UNSET;
-+
-+ if (isdigit(*spec)) {
-+ /* fetch width */
-+ if (! jt_read_integer(&spec, &info->crop_width))
-+ return FALSE;
-+ info->crop_width_set = JCROP_POS;
-+ }
-+ if (*spec == 'x' || *spec == 'X') {
-+ /* fetch height */
-+ spec++;
-+ if (! jt_read_integer(&spec, &info->crop_height))
-+ return FALSE;
-+ info->crop_height_set = JCROP_POS;
-+ }
-+ if (*spec == '+' || *spec == '-') {
-+ /* fetch xoffset */
-+ info->crop_xoffset_set = (*spec == '-') ? JCROP_NEG : JCROP_POS;
-+ spec++;
-+ if (! jt_read_integer(&spec, &info->crop_xoffset))
-+ return FALSE;
-+ }
-+ if (*spec == '+' || *spec == '-') {
-+ /* fetch yoffset */
-+ info->crop_yoffset_set = (*spec == '-') ? JCROP_NEG : JCROP_POS;
-+ spec++;
-+ if (! jt_read_integer(&spec, &info->crop_yoffset))
-+ return FALSE;
-+ }
-+ /* We had better have gotten to the end of the string. */
-+ if (*spec != '\0')
-+ return FALSE;
-+ info->crop = TRUE;
-+ return TRUE;
-+}
-+
-+
-+/* Trim off any partial iMCUs on the indicated destination edge */
-+
-+LOCAL(void)
-+trim_right_edge (jpeg_transform_info *info, JDIMENSION full_width)
-+{
-+ JDIMENSION MCU_cols;
-+
-+ MCU_cols = info->output_width / (info->max_h_samp_factor * DCTSIZE);
-+ if (MCU_cols > 0 && info->x_crop_offset + MCU_cols ==
-+ full_width / (info->max_h_samp_factor * DCTSIZE))
-+ info->output_width = MCU_cols * (info->max_h_samp_factor * DCTSIZE);
-+}
-+
-+LOCAL(void)
-+trim_bottom_edge (jpeg_transform_info *info, JDIMENSION full_height)
-+{
-+ JDIMENSION MCU_rows;
-+
-+ MCU_rows = info->output_height / (info->max_v_samp_factor * DCTSIZE);
-+ if (MCU_rows > 0 && info->y_crop_offset + MCU_rows ==
-+ full_height / (info->max_v_samp_factor * DCTSIZE))
-+ info->output_height = MCU_rows * (info->max_v_samp_factor * DCTSIZE);
-+}
-+
-+
- /* Request any required workspace.
- *
-+ * This routine figures out the size that the output image will be
-+ * (which implies that all the transform parameters must be set before
-+ * it is called).
-+ *
- * We allocate the workspace virtual arrays from the source decompression
- * object, so that all the arrays (both the original data and the workspace)
- * will be taken into account while making memory management decisions.
-@@ -569,9 +859,13 @@
- jpeg_transform_info *info)
- {
- jvirt_barray_ptr *coef_arrays = NULL;
-+ boolean need_workspace, transpose_it;
- jpeg_component_info *compptr;
-- int ci;
-+ JDIMENSION xoffset, yoffset, width_in_iMCUs, height_in_iMCUs;
-+ JDIMENSION width_in_blocks, height_in_blocks;
-+ int ci, h_samp_factor, v_samp_factor;
-
-+ /* Determine number of components in output image */
- if (info->force_grayscale &&
- srcinfo->jpeg_color_space == JCS_YCbCr &&
- srcinfo->num_components == 3) {
-@@ -581,55 +875,181 @@
- /* Process all the components */
- info->num_components = srcinfo->num_components;
- }
-+ /* If there is only one output component, force the iMCU size to be 1;
-+ * else use the source iMCU size. (This allows us to do the right thing
-+ * when reducing color to grayscale, and also provides a handy way of
-+ * cleaning up "funny" grayscale images whose sampling factors are not 1x1.)
-+ */
-
- switch (info->transform) {
-+ case JXFORM_TRANSPOSE:
-+ case JXFORM_TRANSVERSE:
-+ case JXFORM_ROT_90:
-+ case JXFORM_ROT_270:
-+ info->output_width = srcinfo->image_height;
-+ info->output_height = srcinfo->image_width;
-+ if (info->num_components == 1) {
-+ info->max_h_samp_factor = 1;
-+ info->max_v_samp_factor = 1;
-+ } else {
-+ info->max_h_samp_factor = srcinfo->max_v_samp_factor;
-+ info->max_v_samp_factor = srcinfo->max_h_samp_factor;
-+ }
-+ break;
-+ default:
-+ info->output_width = srcinfo->image_width;
-+ info->output_height = srcinfo->image_height;
-+ if (info->num_components == 1) {
-+ info->max_h_samp_factor = 1;
-+ info->max_v_samp_factor = 1;
-+ } else {
-+ info->max_h_samp_factor = srcinfo->max_h_samp_factor;
-+ info->max_v_samp_factor = srcinfo->max_v_samp_factor;
-+ }
-+ break;
-+ }
-+
-+ /* If cropping has been requested, compute the crop area's position and
-+ * dimensions, ensuring that its upper left corner falls at an iMCU boundary.
-+ */
-+ if (info->crop) {
-+ /* Insert default values for unset crop parameters */
-+ if (info->crop_xoffset_set == JCROP_UNSET)
-+ info->crop_xoffset = 0; /* default to +0 */
-+ if (info->crop_yoffset_set == JCROP_UNSET)
-+ info->crop_yoffset = 0; /* default to +0 */
-+ if (info->crop_xoffset >= info->output_width ||
-+ info->crop_yoffset >= info->output_height)
-+ ERREXIT(srcinfo, JERR_BAD_CROP_SPEC);
-+ if (info->crop_width_set == JCROP_UNSET)
-+ info->crop_width = info->output_width - info->crop_xoffset;
-+ if (info->crop_height_set == JCROP_UNSET)
-+ info->crop_height = info->output_height - info->crop_yoffset;
-+ /* Ensure parameters are valid */
-+ if (info->crop_width <= 0 || info->crop_width > info->output_width ||
-+ info->crop_height <= 0 || info->crop_height > info->output_height ||
-+ info->crop_xoffset > info->output_width - info->crop_width ||
-+ info->crop_yoffset > info->output_height - info->crop_height)
-+ ERREXIT(srcinfo, JERR_BAD_CROP_SPEC);
-+ /* Convert negative crop offsets into regular offsets */
-+ if (info->crop_xoffset_set == JCROP_NEG)
-+ xoffset = info->output_width - info->crop_width - info->crop_xoffset;
-+ else
-+ xoffset = info->crop_xoffset;
-+ if (info->crop_yoffset_set == JCROP_NEG)
-+ yoffset = info->output_height - info->crop_height - info->crop_yoffset;
-+ else
-+ yoffset = info->crop_yoffset;
-+ /* Now adjust so that upper left corner falls at an iMCU boundary */
-+ info->output_width =
-+ info->crop_width + (xoffset % (info->max_h_samp_factor * DCTSIZE));
-+ info->output_height =
-+ info->crop_height + (yoffset % (info->max_v_samp_factor * DCTSIZE));
-+ /* Save x/y offsets measured in iMCUs */
-+ info->x_crop_offset = xoffset / (info->max_h_samp_factor * DCTSIZE);
-+ info->y_crop_offset = yoffset / (info->max_v_samp_factor * DCTSIZE);
-+ } else {
-+ info->x_crop_offset = 0;
-+ info->y_crop_offset = 0;
-+ }
-+
-+ /* Figure out whether we need workspace arrays,
-+ * and if so whether they are transposed relative to the source.
-+ */
-+ need_workspace = FALSE;
-+ transpose_it = FALSE;
-+ switch (info->transform) {
- case JXFORM_NONE:
-+ if (info->x_crop_offset != 0 || info->y_crop_offset != 0)
-+ need_workspace = TRUE;
-+ /* No workspace needed if neither cropping nor transforming */
-+ break;
- case JXFORM_FLIP_H:
-- /* Don't need a workspace array */
-+ if (info->trim)
-+ trim_right_edge(info, srcinfo->image_width);
-+ if (info->y_crop_offset != 0)
-+ need_workspace = TRUE;
-+ /* do_flip_h_no_crop doesn't need a workspace array */
- break;
- case JXFORM_FLIP_V:
-- case JXFORM_ROT_180:
-- /* Need workspace arrays having same dimensions as source image.
-- * Note that we allocate arrays padded out to the next iMCU boundary,
-- * so that transform routines need not worry about missing edge blocks.
-- */
-- coef_arrays = (jvirt_barray_ptr *)
-- (*srcinfo->mem->alloc_small) ((j_common_ptr) srcinfo, JPOOL_IMAGE,
-- SIZEOF(jvirt_barray_ptr) * info->num_components);
-- for (ci = 0; ci < info->num_components; ci++) {
-- compptr = srcinfo->comp_info + ci;
-- coef_arrays[ci] = (*srcinfo->mem->request_virt_barray)
-- ((j_common_ptr) srcinfo, JPOOL_IMAGE, FALSE,
-- (JDIMENSION) jround_up((long) compptr->width_in_blocks,
-- (long) compptr->h_samp_factor),
-- (JDIMENSION) jround_up((long) compptr->height_in_blocks,
-- (long) compptr->v_samp_factor),
-- (JDIMENSION) compptr->v_samp_factor);
-- }
-+ if (info->trim)
-+ trim_bottom_edge(info, srcinfo->image_height);
-+ /* Need workspace arrays having same dimensions as source image. */
-+ need_workspace = TRUE;
- break;
- case JXFORM_TRANSPOSE:
-+ /* transpose does NOT have to trim anything */
-+ /* Need workspace arrays having transposed dimensions. */
-+ need_workspace = TRUE;
-+ transpose_it = TRUE;
-+ break;
- case JXFORM_TRANSVERSE:
-+ if (info->trim) {
-+ trim_right_edge(info, srcinfo->image_height);
-+ trim_bottom_edge(info, srcinfo->image_width);
-+ }
-+ /* Need workspace arrays having transposed dimensions. */
-+ need_workspace = TRUE;
-+ transpose_it = TRUE;
-+ break;
- case JXFORM_ROT_90:
-+ if (info->trim)
-+ trim_right_edge(info, srcinfo->image_height);
-+ /* Need workspace arrays having transposed dimensions. */
-+ need_workspace = TRUE;
-+ transpose_it = TRUE;
-+ break;
-+ case JXFORM_ROT_180:
-+ if (info->trim) {
-+ trim_right_edge(info, srcinfo->image_width);
-+ trim_bottom_edge(info, srcinfo->image_height);
-+ }
-+ /* Need workspace arrays having same dimensions as source image. */
-+ need_workspace = TRUE;
-+ break;
- case JXFORM_ROT_270:
-- /* Need workspace arrays having transposed dimensions.
-- * Note that we allocate arrays padded out to the next iMCU boundary,
-- * so that transform routines need not worry about missing edge blocks.
-- */
-+ if (info->trim)
-+ trim_bottom_edge(info, srcinfo->image_width);
-+ /* Need workspace arrays having transposed dimensions. */
-+ need_workspace = TRUE;
-+ transpose_it = TRUE;
-+ break;
-+ }
-+
-+ /* Allocate workspace if needed.
-+ * Note that we allocate arrays padded out to the next iMCU boundary,
-+ * 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);
-+ SIZEOF(jvirt_barray_ptr) * info->num_components);
-+ width_in_iMCUs = (JDIMENSION)
-+ jdiv_round_up((long) info->output_width,
-+ (long) (info->max_h_samp_factor * DCTSIZE));
-+ height_in_iMCUs = (JDIMENSION)
-+ jdiv_round_up((long) info->output_height,
-+ (long) (info->max_v_samp_factor * DCTSIZE));
- for (ci = 0; ci < info->num_components; ci++) {
- compptr = srcinfo->comp_info + ci;
-+ if (info->num_components == 1) {
-+ /* we're going to force samp factors to 1x1 in this case */
-+ h_samp_factor = v_samp_factor = 1;
-+ } else if (transpose_it) {
-+ h_samp_factor = compptr->v_samp_factor;
-+ v_samp_factor = compptr->h_samp_factor;
-+ } else {
-+ h_samp_factor = compptr->h_samp_factor;
-+ v_samp_factor = compptr->v_samp_factor;
-+ }
-+ width_in_blocks = width_in_iMCUs * h_samp_factor;
-+ height_in_blocks = height_in_iMCUs * v_samp_factor;
- coef_arrays[ci] = (*srcinfo->mem->request_virt_barray)
- ((j_common_ptr) srcinfo, JPOOL_IMAGE, FALSE,
-- (JDIMENSION) jround_up((long) compptr->height_in_blocks,
-- (long) compptr->v_samp_factor),
-- (JDIMENSION) jround_up((long) compptr->width_in_blocks,
-- (long) compptr->h_samp_factor),
-- (JDIMENSION) compptr->h_samp_factor);
-+ width_in_blocks, height_in_blocks, (JDIMENSION) v_samp_factor);
- }
-- break;
- }
-+
- info->workspace_coef_arrays = coef_arrays;
- }
-
-@@ -642,14 +1062,8 @@
- int tblno, i, j, ci, itemp;
- jpeg_component_info *compptr;
- JQUANT_TBL *qtblptr;
-- JDIMENSION dtemp;
- UINT16 qtemp;
-
-- /* Transpose basic image dimensions */
-- dtemp = dstinfo->image_width;
-- dstinfo->image_width = dstinfo->image_height;
-- dstinfo->image_height = dtemp;
--
- /* Transpose sampling factors */
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
-@@ -674,46 +1088,159 @@
- }
-
-
--/* Trim off any partial iMCUs on the indicated destination edge */
-+/* Adjust Exif image parameters.
-+ *
-+ * We try to adjust the Tags ExifImageWidth and ExifImageHeight if possible.
-+ */
-
- LOCAL(void)
--trim_right_edge (j_compress_ptr dstinfo)
-+adjust_exif_parameters (JOCTET FAR * data, unsigned int length,
-+ JDIMENSION new_width, JDIMENSION new_height)
- {
-- int ci, max_h_samp_factor;
-- JDIMENSION MCU_cols;
-+ boolean is_motorola; /* Flag for byte order */
-+ unsigned int number_of_tags, tagnum;
-+ unsigned int firstoffset, offset;
-+ JDIMENSION new_value;
-
-- /* We have to compute max_h_samp_factor ourselves,
-- * because it hasn't been set yet in the destination
-- * (and we don't want to use the source's value).
-- */
-- max_h_samp_factor = 1;
-- for (ci = 0; ci < dstinfo->num_components; ci++) {
-- int h_samp_factor = dstinfo->comp_info[ci].h_samp_factor;
-- max_h_samp_factor = MAX(max_h_samp_factor, h_samp_factor);
-+ if (length < 12) return; /* Length of an IFD entry */
-+
-+ /* Discover byte order */
-+ if (GETJOCTET(data[0]) == 0x49 && GETJOCTET(data[1]) == 0x49)
-+ is_motorola = FALSE;
-+ else if (GETJOCTET(data[0]) == 0x4D && GETJOCTET(data[1]) == 0x4D)
-+ is_motorola = TRUE;
-+ else
-+ return;
-+
-+ /* Check Tag Mark */
-+ if (is_motorola) {
-+ if (GETJOCTET(data[2]) != 0) return;
-+ if (GETJOCTET(data[3]) != 0x2A) return;
-+ } else {
-+ if (GETJOCTET(data[3]) != 0) return;
-+ if (GETJOCTET(data[2]) != 0x2A) return;
- }
-- MCU_cols = dstinfo->image_width / (max_h_samp_factor * DCTSIZE);
-- if (MCU_cols > 0) /* can't trim to 0 pixels */
-- dstinfo->image_width = MCU_cols * (max_h_samp_factor * DCTSIZE);
--}
-
--LOCAL(void)
--trim_bottom_edge (j_compress_ptr dstinfo)
--{
-- int ci, max_v_samp_factor;
-- JDIMENSION MCU_rows;
-+ /* Get first IFD offset (offset to IFD0) */
-+ if (is_motorola) {
-+ if (GETJOCTET(data[4]) != 0) return;
-+ if (GETJOCTET(data[5]) != 0) return;
-+ firstoffset = GETJOCTET(data[6]);
-+ firstoffset <<= 8;
-+ firstoffset += GETJOCTET(data[7]);
-+ } else {
-+ if (GETJOCTET(data[7]) != 0) return;
-+ if (GETJOCTET(data[6]) != 0) return;
-+ firstoffset = GETJOCTET(data[5]);
-+ firstoffset <<= 8;
-+ firstoffset += GETJOCTET(data[4]);
-+ }
-+ if (firstoffset > length - 2) return; /* check end of data segment */
-
-- /* We have to compute max_v_samp_factor ourselves,
-- * because it hasn't been set yet in the destination
-- * (and we don't want to use the source's value).
-- */
-- max_v_samp_factor = 1;
-- for (ci = 0; ci < dstinfo->num_components; ci++) {
-- int v_samp_factor = dstinfo->comp_info[ci].v_samp_factor;
-- max_v_samp_factor = MAX(max_v_samp_factor, v_samp_factor);
-+ /* Get the number of directory entries contained in this IFD */
-+ if (is_motorola) {
-+ number_of_tags = GETJOCTET(data[firstoffset]);
-+ number_of_tags <<= 8;
-+ number_of_tags += GETJOCTET(data[firstoffset+1]);
-+ } else {
-+ number_of_tags = GETJOCTET(data[firstoffset+1]);
-+ number_of_tags <<= 8;
-+ number_of_tags += GETJOCTET(data[firstoffset]);
- }
-- MCU_rows = dstinfo->image_height / (max_v_samp_factor * DCTSIZE);
-- if (MCU_rows > 0) /* can't trim to 0 pixels */
-- dstinfo->image_height = MCU_rows * (max_v_samp_factor * DCTSIZE);
-+ if (number_of_tags == 0) return;
-+ firstoffset += 2;
-+
-+ /* Search for ExifSubIFD offset Tag in IFD0 */
-+ for (;;) {
-+ if (firstoffset > length - 12) return; /* check end of data segment */
-+ /* Get Tag number */
-+ if (is_motorola) {
-+ tagnum = GETJOCTET(data[firstoffset]);
-+ tagnum <<= 8;
-+ tagnum += GETJOCTET(data[firstoffset+1]);
-+ } else {
-+ tagnum = GETJOCTET(data[firstoffset+1]);
-+ tagnum <<= 8;
-+ tagnum += GETJOCTET(data[firstoffset]);
-+ }
-+ if (tagnum == 0x8769) break; /* found ExifSubIFD offset Tag */
-+ if (--number_of_tags == 0) return;
-+ firstoffset += 12;
-+ }
-+
-+ /* Get the ExifSubIFD offset */
-+ if (is_motorola) {
-+ if (GETJOCTET(data[firstoffset+8]) != 0) return;
-+ if (GETJOCTET(data[firstoffset+9]) != 0) return;
-+ offset = GETJOCTET(data[firstoffset+10]);
-+ offset <<= 8;
-+ offset += GETJOCTET(data[firstoffset+11]);
-+ } else {
-+ if (GETJOCTET(data[firstoffset+11]) != 0) return;
-+ if (GETJOCTET(data[firstoffset+10]) != 0) return;
-+ offset = GETJOCTET(data[firstoffset+9]);
-+ offset <<= 8;
-+ offset += GETJOCTET(data[firstoffset+8]);
-+ }
-+ if (offset > length - 2) return; /* check end of data segment */
-+
-+ /* Get the number of directory entries contained in this SubIFD */
-+ if (is_motorola) {
-+ number_of_tags = GETJOCTET(data[offset]);
-+ number_of_tags <<= 8;
-+ number_of_tags += GETJOCTET(data[offset+1]);
-+ } else {
-+ number_of_tags = GETJOCTET(data[offset+1]);
-+ number_of_tags <<= 8;
-+ number_of_tags += GETJOCTET(data[offset]);
-+ }
-+ if (number_of_tags < 2) return;
-+ offset += 2;
-+
-+ /* Search for ExifImageWidth and ExifImageHeight Tags in this SubIFD */
-+ do {
-+ if (offset > length - 12) return; /* check end of data segment */
-+ /* Get Tag number */
-+ if (is_motorola) {
-+ tagnum = GETJOCTET(data[offset]);
-+ tagnum <<= 8;
-+ tagnum += GETJOCTET(data[offset+1]);
-+ } else {
-+ tagnum = GETJOCTET(data[offset+1]);
-+ tagnum <<= 8;
-+ tagnum += GETJOCTET(data[offset]);
-+ }
-+ if (tagnum == 0xA002 || tagnum == 0xA003) {
-+ if (tagnum == 0xA002)
-+ new_value = new_width; /* ExifImageWidth Tag */
-+ else
-+ new_value = new_height; /* ExifImageHeight Tag */
-+ if (is_motorola) {
-+ data[offset+2] = 0; /* Format = unsigned long (4 octets) */
-+ data[offset+3] = 4;
-+ data[offset+4] = 0; /* Number Of Components = 1 */
-+ data[offset+5] = 0;
-+ data[offset+6] = 0;
-+ data[offset+7] = 1;
-+ data[offset+8] = 0;
-+ data[offset+9] = 0;
-+ data[offset+10] = (JOCTET)((new_value >> 8) & 0xFF);
-+ data[offset+11] = (JOCTET)(new_value & 0xFF);
-+ } else {
-+ data[offset+2] = 4; /* Format = unsigned long (4 octets) */
-+ data[offset+3] = 0;
-+ data[offset+4] = 1; /* Number Of Components = 1 */
-+ data[offset+5] = 0;
-+ data[offset+6] = 0;
-+ data[offset+7] = 0;
-+ data[offset+8] = (JOCTET)(new_value & 0xFF);
-+ data[offset+9] = (JOCTET)((new_value >> 8) & 0xFF);
-+ data[offset+10] = 0;
-+ data[offset+11] = 0;
-+ }
-+ }
-+ offset += 12;
-+ } while (--number_of_tags);
- }
-
-
-@@ -736,18 +1263,22 @@
- {
- /* If force-to-grayscale is requested, adjust destination parameters */
- if (info->force_grayscale) {
-- /* We use jpeg_set_colorspace to make sure subsidiary settings get fixed
-- * properly. Among other things, the target h_samp_factor & v_samp_factor
-- * will get set to 1, which typically won't match the source.
-- * In fact we do this even if the source is already grayscale; that
-- * provides an easy way of coercing a grayscale JPEG with funny sampling
-- * factors to the customary 1,1. (Some decoders fail on other factors.)
-+ /* First, ensure we have YCbCr or grayscale data, and that the source's
-+ * Y channel is full resolution. (No reasonable person would make Y
-+ * be less than full resolution, so actually coping with that case
-+ * isn't worth extra code space. But we check it to avoid crashing.)
- */
-- if ((dstinfo->jpeg_color_space == JCS_YCbCr &&
-- dstinfo->num_components == 3) ||
-- (dstinfo->jpeg_color_space == JCS_GRAYSCALE &&
-- dstinfo->num_components == 1)) {
-- /* We have to preserve the source's quantization table number. */
-+ if (((dstinfo->jpeg_color_space == JCS_YCbCr &&
-+ dstinfo->num_components == 3) ||
-+ (dstinfo->jpeg_color_space == JCS_GRAYSCALE &&
-+ dstinfo->num_components == 1)) &&
-+ srcinfo->comp_info[0].h_samp_factor == srcinfo->max_h_samp_factor &&
-+ srcinfo->comp_info[0].v_samp_factor == srcinfo->max_v_samp_factor) {
-+ /* We use jpeg_set_colorspace to make sure subsidiary settings get fixed
-+ * properly. Among other things, it sets the target h_samp_factor &
-+ * v_samp_factor to 1, which typically won't match the source.
-+ * We have to preserve the source's quantization table number, however.
-+ */
- int sv_quant_tbl_no = dstinfo->comp_info[0].quant_tbl_no;
- jpeg_set_colorspace(dstinfo, JCS_GRAYSCALE);
- dstinfo->comp_info[0].quant_tbl_no = sv_quant_tbl_no;
-@@ -755,50 +1286,52 @@
- /* Sorry, can't do it */
- ERREXIT(dstinfo, JERR_CONVERSION_NOTIMPL);
- }
-+ } else if (info->num_components == 1) {
-+ /* For a single-component source, we force the destination sampling factors
-+ * to 1x1, with or without force_grayscale. This is useful because some
-+ * decoders choke on grayscale images with other sampling factors.
-+ */
-+ dstinfo->comp_info[0].h_samp_factor = 1;
-+ dstinfo->comp_info[0].v_samp_factor = 1;
- }
-
-- /* Correct the destination's image dimensions etc if necessary */
-+ /* Correct the destination's image dimensions as necessary
-+ * for crop and rotate/flip operations.
-+ */
-+ dstinfo->image_width = info->output_width;
-+ dstinfo->image_height = info->output_height;
-+
-+ /* Transpose destination image parameters */
- switch (info->transform) {
-- case JXFORM_NONE:
-- /* Nothing to do */
-- break;
-- case JXFORM_FLIP_H:
-- if (info->trim)
-- trim_right_edge(dstinfo);
-- break;
-- case JXFORM_FLIP_V:
-- if (info->trim)
-- trim_bottom_edge(dstinfo);
-- break;
- case JXFORM_TRANSPOSE:
-- transpose_critical_parameters(dstinfo);
-- /* transpose does NOT have to trim anything */
-- break;
- case JXFORM_TRANSVERSE:
-- transpose_critical_parameters(dstinfo);
-- if (info->trim) {
-- trim_right_edge(dstinfo);
-- trim_bottom_edge(dstinfo);
-- }
-- break;
- case JXFORM_ROT_90:
-- transpose_critical_parameters(dstinfo);
-- if (info->trim)
-- trim_right_edge(dstinfo);
-- break;
-- case JXFORM_ROT_180:
-- if (info->trim) {
-- trim_right_edge(dstinfo);
-- trim_bottom_edge(dstinfo);
-- }
-- break;
- case JXFORM_ROT_270:
- transpose_critical_parameters(dstinfo);
-- if (info->trim)
-- trim_bottom_edge(dstinfo);
- break;
- }
-
-+ /* Adjust Exif properties */
-+ if (srcinfo->marker_list != NULL &&
-+ srcinfo->marker_list->marker == JPEG_APP0+1 &&
-+ srcinfo->marker_list->data_length >= 6 &&
-+ GETJOCTET(srcinfo->marker_list->data[0]) == 0x45 &&
-+ GETJOCTET(srcinfo->marker_list->data[1]) == 0x78 &&
-+ GETJOCTET(srcinfo->marker_list->data[2]) == 0x69 &&
-+ GETJOCTET(srcinfo->marker_list->data[3]) == 0x66 &&
-+ GETJOCTET(srcinfo->marker_list->data[4]) == 0 &&
-+ GETJOCTET(srcinfo->marker_list->data[5]) == 0) {
-+ /* Suppress output of JFIF marker */
-+ dstinfo->write_JFIF_header = FALSE;
-+ /* Adjust Exif image parameters */
-+ if (dstinfo->image_width != srcinfo->image_width ||
-+ dstinfo->image_height != srcinfo->image_height)
-+ /* Align data segment to start of TIFF structure for parsing */
-+ adjust_exif_parameters(srcinfo->marker_list->data + 6,
-+ srcinfo->marker_list->data_length - 6,
-+ dstinfo->image_width, dstinfo->image_height);
-+ }
-+
- /* Return the appropriate output data set */
- if (info->workspace_coef_arrays != NULL)
- return info->workspace_coef_arrays;
-@@ -816,38 +1349,106 @@
- */
-
- GLOBAL(void)
--jtransform_execute_transformation (j_decompress_ptr srcinfo,
-- j_compress_ptr dstinfo,
-- jvirt_barray_ptr *src_coef_arrays,
-- jpeg_transform_info *info)
-+jtransform_execute_transform (j_decompress_ptr srcinfo,
-+ j_compress_ptr dstinfo,
-+ jvirt_barray_ptr *src_coef_arrays,
-+ jpeg_transform_info *info)
- {
- jvirt_barray_ptr *dst_coef_arrays = info->workspace_coef_arrays;
-
-+ /* Note: conditions tested here should match those in switch statement
-+ * in jtransform_request_workspace()
-+ */
- switch (info->transform) {
- case JXFORM_NONE:
-+ 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;
- case JXFORM_FLIP_H:
-- do_flip_h(srcinfo, dstinfo, src_coef_arrays);
-+ if (info->y_crop_offset != 0)
-+ do_flip_h(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset,
-+ src_coef_arrays, dst_coef_arrays);
-+ else
-+ do_flip_h_no_crop(srcinfo, dstinfo, info->x_crop_offset,
-+ src_coef_arrays);
- break;
- case JXFORM_FLIP_V:
-- do_flip_v(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
-+ do_flip_v(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset,
-+ src_coef_arrays, dst_coef_arrays);
- break;
- case JXFORM_TRANSPOSE:
-- do_transpose(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
-+ do_transpose(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset,
-+ src_coef_arrays, dst_coef_arrays);
- break;
- case JXFORM_TRANSVERSE:
-- do_transverse(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
-+ do_transverse(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset,
-+ src_coef_arrays, dst_coef_arrays);
- break;
- case JXFORM_ROT_90:
-- do_rot_90(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
-+ do_rot_90(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset,
-+ src_coef_arrays, dst_coef_arrays);
- break;
- case JXFORM_ROT_180:
-- do_rot_180(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
-+ do_rot_180(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset,
-+ src_coef_arrays, dst_coef_arrays);
- break;
- case JXFORM_ROT_270:
-- do_rot_270(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
-+ do_rot_270(srcinfo, dstinfo, info->x_crop_offset, info->y_crop_offset,
-+ src_coef_arrays, dst_coef_arrays);
-+ break;
-+ }
-+}
-+
-+/* jtransform_perfect_transform
-+ *
-+ * Determine whether lossless transformation is perfectly
-+ * possible for a specified image and transformation.
-+ *
-+ * Inputs:
-+ * image_width, image_height: source image dimensions.
-+ * MCU_width, MCU_height: pixel dimensions of MCU.
-+ * transform: transformation identifier.
-+ * Parameter sources from initialized jpeg_struct
-+ * (after reading source header):
-+ * image_width = cinfo.image_width
-+ * image_height = cinfo.image_height
-+ * MCU_width = cinfo.max_h_samp_factor * DCTSIZE
-+ * MCU_height = cinfo.max_v_samp_factor * DCTSIZE
-+ * Result:
-+ * TRUE = perfect transformation possible
-+ * FALSE = perfect transformation not possible
-+ * (may use custom action then)
-+ */
-+
-+GLOBAL(boolean)
-+jtransform_perfect_transform(JDIMENSION image_width, JDIMENSION image_height,
-+ int MCU_width, int MCU_height,
-+ JXFORM_CODE transform)
-+{
-+ boolean result = TRUE; /* initialize TRUE */
-+
-+ switch (transform) {
-+ case JXFORM_FLIP_H:
-+ case JXFORM_ROT_270:
-+ if (image_width % (JDIMENSION) MCU_width)
-+ result = FALSE;
-+ break;
-+ case JXFORM_FLIP_V:
-+ case JXFORM_ROT_90:
-+ if (image_height % (JDIMENSION) MCU_height)
-+ result = FALSE;
-+ break;
-+ case JXFORM_TRANSVERSE:
-+ case JXFORM_ROT_180:
-+ if (image_width % (JDIMENSION) MCU_width)
-+ result = FALSE;
-+ if (image_height % (JDIMENSION) MCU_height)
-+ result = FALSE;
- break;
- }
-+
-+ return result;
- }
-
- #endif /* TRANSFORMS_SUPPORTED */
-diff -urNad /home/bill/debian/libjpeg/libjpeg6b-6b/transupp.h libjpeg6b-6b/transupp.h
---- /home/bill/debian/libjpeg/libjpeg6b-6b/transupp.h 2003-09-22 18:15:49.000000000 +0200
-+++ libjpeg6b-6b/transupp.h 2003-09-22 18:16:16.000000000 +0200
-@@ -1,7 +1,7 @@
- /*
- * transupp.h
- *
-- * Copyright (C) 1997, Thomas G. Lane.
-+ * Copyright (C) 1997-2001, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
-@@ -22,32 +22,6 @@
- #define TRANSFORMS_SUPPORTED 1 /* 0 disables transform code */
- #endif
-
--/* Short forms of external names for systems with brain-damaged linkers. */
--
--#ifdef NEED_SHORT_EXTERNAL_NAMES
--#define jtransform_request_workspace jTrRequest
--#define jtransform_adjust_parameters jTrAdjust
--#define jtransform_execute_transformation jTrExec
--#define jcopy_markers_setup jCMrkSetup
--#define jcopy_markers_execute jCMrkExec
--#endif /* NEED_SHORT_EXTERNAL_NAMES */
--
--
--/*
-- * Codes for supported types of image transformations.
-- */
--
--typedef enum {
-- JXFORM_NONE, /* no transformation */
-- JXFORM_FLIP_H, /* horizontal flip */
-- JXFORM_FLIP_V, /* vertical flip */
-- JXFORM_TRANSPOSE, /* transpose across UL-to-LR axis */
-- JXFORM_TRANSVERSE, /* transpose across UR-to-LL axis */
-- JXFORM_ROT_90, /* 90-degree clockwise rotation */
-- JXFORM_ROT_180, /* 180-degree rotation */
-- JXFORM_ROT_270 /* 270-degree clockwise (or 90 ccw) */
--} JXFORM_CODE;
--
- /*
- * Although rotating and flipping data expressed as DCT coefficients is not
- * hard, there is an asymmetry in the JPEG format specification for images
-@@ -75,6 +49,19 @@
- * (For example, -rot 270 -trim trims only the bottom edge, but -rot 90 -trim
- * followed by -rot 180 -trim trims both edges.)
- *
-+ * We also offer a lossless-crop option, which discards data outside a given
-+ * image region but losslessly preserves what is inside. Like the rotate and
-+ * flip transforms, lossless crop is restricted by the JPEG format: the upper
-+ * left corner of the selected region must fall on an iMCU boundary. If this
-+ * does not hold for the given crop parameters, we silently move the upper left
-+ * corner up and/or left to make it so, simultaneously increasing the region
-+ * dimensions to keep the lower right crop corner unchanged. (Thus, the
-+ * output image covers at least the requested region, but may cover more.)
-+ *
-+ * If both crop and a rotate/flip transform are requested, the crop is applied
-+ * last --- that is, the crop region is specified in terms of the destination
-+ * image.
-+ *
- * We also offer a "force to grayscale" option, which simply discards the
- * chrominance channels of a YCbCr image. This is lossless in the sense that
- * the luminance channel is preserved exactly. It's not the same kind of
-@@ -83,20 +70,89 @@
- * be aware of the option to know how many components to work on.
- */
-
-+
-+/* Short forms of external names for systems with brain-damaged linkers. */
-+
-+#ifdef NEED_SHORT_EXTERNAL_NAMES
-+#define jtransform_parse_crop_spec jTrParCrop
-+#define jtransform_request_workspace jTrRequest
-+#define jtransform_adjust_parameters jTrAdjust
-+#define jtransform_execute_transform jTrExec
-+#define jtransform_perfect_transform jTrPerfect
-+#define jcopy_markers_setup jCMrkSetup
-+#define jcopy_markers_execute jCMrkExec
-+#endif /* NEED_SHORT_EXTERNAL_NAMES */
-+
-+
-+/*
-+ * Codes for supported types of image transformations.
-+ */
-+
-+typedef enum {
-+ JXFORM_NONE, /* no transformation */
-+ JXFORM_FLIP_H, /* horizontal flip */
-+ JXFORM_FLIP_V, /* vertical flip */
-+ JXFORM_TRANSPOSE, /* transpose across UL-to-LR axis */
-+ JXFORM_TRANSVERSE, /* transpose across UR-to-LL axis */
-+ JXFORM_ROT_90, /* 90-degree clockwise rotation */
-+ JXFORM_ROT_180, /* 180-degree rotation */
-+ JXFORM_ROT_270 /* 270-degree clockwise (or 90 ccw) */
-+} JXFORM_CODE;
-+
-+/*
-+ * Codes for crop parameters, which can individually be unspecified,
-+ * positive, or negative. (Negative width or height makes no sense, though.)
-+ */
-+
-+typedef enum {
-+ JCROP_UNSET,
-+ JCROP_POS,
-+ JCROP_NEG
-+} JCROP_CODE;
-+
-+/*
-+ * Transform parameters struct.
-+ * NB: application must not change any elements of this struct after
-+ * calling jtransform_request_workspace.
-+ */
-+
- typedef struct {
- /* Options: set by caller */
- JXFORM_CODE transform; /* image transform operator */
-+ boolean perfect; /* if TRUE, fail if partial MCUs are requested */
- boolean trim; /* if TRUE, trim partial MCUs as needed */
- boolean force_grayscale; /* if TRUE, convert color image to grayscale */
-+ boolean crop; /* if TRUE, crop source image */
-+
-+ /* Crop parameters: application need not set these unless crop is TRUE.
-+ * These can be filled in by jtransform_parse_crop_spec().
-+ */
-+ JDIMENSION crop_width; /* Width of selected region */
-+ JCROP_CODE crop_width_set;
-+ JDIMENSION crop_height; /* Height of selected region */
-+ JCROP_CODE crop_height_set;
-+ JDIMENSION crop_xoffset; /* X offset of selected region */
-+ JCROP_CODE crop_xoffset_set; /* (negative measures from right edge) */
-+ JDIMENSION crop_yoffset; /* Y offset of selected region */
-+ JCROP_CODE crop_yoffset_set; /* (negative measures from bottom edge) */
-
- /* Internal workspace: caller should not touch these */
- int num_components; /* # of components in workspace */
- jvirt_barray_ptr * workspace_coef_arrays; /* workspace for transformations */
-+ JDIMENSION output_width; /* cropped destination dimensions */
-+ JDIMENSION output_height;
-+ JDIMENSION x_crop_offset; /* destination crop offsets measured in iMCUs */
-+ JDIMENSION y_crop_offset;
-+ int max_h_samp_factor; /* destination iMCU size */
-+ int max_v_samp_factor;
- } jpeg_transform_info;
-
-
- #if TRANSFORMS_SUPPORTED
-
-+/* Parse a crop specification (written in X11 geometry style) */
-+EXTERN(boolean) jtransform_parse_crop_spec
-+ JPP((jpeg_transform_info *info, const char *spec));
- /* Request any required workspace */
- EXTERN(void) jtransform_request_workspace
- JPP((j_decompress_ptr srcinfo, jpeg_transform_info *info));
-@@ -106,10 +162,24 @@
- jvirt_barray_ptr *src_coef_arrays,
- jpeg_transform_info *info));
- /* Execute the actual transformation, if any */
--EXTERN(void) jtransform_execute_transformation
-+EXTERN(void) jtransform_execute_transform
- JPP((j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jpeg_transform_info *info));
-+/* Determine whether lossless transformation is perfectly
-+ * possible for a specified image and transformation.
-+ */
-+EXTERN(boolean) jtransform_perfect_transform
-+ JPP((JDIMENSION image_width, JDIMENSION image_height,
-+ int MCU_width, int MCU_height,
-+ JXFORM_CODE transform));
-+
-+/* jtransform_execute_transform used to be called
-+ * jtransform_execute_transformation, but some compilers complain about
-+ * routine names that long. This macro is here to avoid breaking any
-+ * old source code that uses the original name...
-+ */
-+#define jtransform_execute_transformation jtransform_execute_transform
-
- #endif /* TRANSFORMS_SUPPORTED */
-
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