SOURCES: libjpeg-crop.patch (NEW) - croppatch in diff form
qboosh
qboosh at pld-linux.org
Sun Jan 27 21:30:30 CET 2008
Author: qboosh Date: Sun Jan 27 20:30:30 2008 GMT
Module: SOURCES Tag: HEAD
---- Log message:
- croppatch in diff form
---- Files affected:
SOURCES:
libjpeg-crop.patch (NONE -> 1.1) (NEW)
---- Diffs:
================================================================
Index: SOURCES/libjpeg-crop.patch
diff -u /dev/null SOURCES/libjpeg-crop.patch:1.1
--- /dev/null Sun Jan 27 21:30:30 2008
+++ SOURCES/libjpeg-crop.patch Sun Jan 27 21:30:24 2008
@@ -0,0 +1,1884 @@
+diff -Nur jpeg-6b.orig/jerror.h jpeg-6b/jerror.h
+--- jpeg-6b.orig/jerror.h 1997-10-18 20:59:10.000000000 +0200
++++ jpeg-6b/jerror.h 2000-03-05 23:34:27.000000000 +0100
+@@ -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 -Nur jpeg-6b.orig/jpegtran.c jpeg-6b/jpegtran.c
+--- jpeg-6b.orig/jpegtran.c 1997-07-24 04:37:26.000000000 +0200
++++ jpeg-6b/jpegtran.c 2003-09-21 21:30:21.000000000 +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 -Nur jpeg-6b.orig/transupp.c jpeg-6b/transupp.c
+--- jpeg-6b.orig/transupp.c 1997-08-10 02:15:26.000000000 +0200
++++ jpeg-6b/transupp.c 2003-09-21 22:50:33.000000000 +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 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;
++ 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++)
<<Diff was trimmed, longer than 597 lines>>
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