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-rw-r--r--Build/source/libs/gd/libgd-src/src/gd_jpeg.c1202
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diff --git a/Build/source/libs/gd/libgd-src/src/gd_jpeg.c b/Build/source/libs/gd/libgd-src/src/gd_jpeg.c
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index 00000000000..925b417fac3
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+++ b/Build/source/libs/gd/libgd-src/src/gd_jpeg.c
@@ -0,0 +1,1202 @@
+/*
+ * gd_jpeg.c: Read and write JPEG (JFIF) format image files using the
+ * gd graphics library (http://www.libgd.org).
+ *
+ * This software is based in part on the work of the Independent JPEG
+ * Group. For more information on the IJG JPEG software (and JPEG
+ * documentation, etc.), see ftp://ftp.uu.net/graphics/jpeg/.
+ *
+ * NOTE: IJG 12-bit JSAMPLE (BITS_IN_JSAMPLE == 12) mode is not
+ * supported at all on read in gd 2.0, and is not supported on write
+ * except for palette images, which is sort of pointless (TBB). Even that
+ * has never been tested according to DB.
+ *
+ * Copyright 2000 Doug Becker, mailto:thebeckers@home.com
+ *
+ * Modification 4/18/00 TBB: JPEG_DEBUG rather than just DEBUG,
+ * so VC++ builds don't spew to standard output, causing
+ * major CGI brain damage
+ *
+ * 2.0.10: more efficient gdImageCreateFromJpegCtx, thanks to
+ * Christian Aberger
+ */
+
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <setjmp.h>
+#include <limits.h>
+#include <string.h>
+
+#include "gd.h"
+#include "gd_errors.h"
+/* TBB: move this up so include files are not brought in */
+/* JCE: arrange HAVE_LIBJPEG so that it can be set in gd.h */
+#ifdef HAVE_LIBJPEG
+#include "gdhelpers.h"
+
+#if defined(_WIN32) && defined(__MINGW32__)
+# define HAVE_BOOLEAN
+#endif
+
+/* JCE undef two symbols that we don't need anymore but which are
+ may be defined in config.h from ./configure but which are
+ redefined incompatibly in jpeglib.h */
+#undef HAVE_STDDEF_H
+#undef HAVE_STDLIB_H
+
+/* 1.8.1: remove dependency on jinclude.h */
+#include "jpeglib.h"
+#include "jerror.h"
+
+static const char *const GD_JPEG_VERSION = "1.0";
+
+typedef struct _jmpbuf_wrapper {
+ jmp_buf jmpbuf;
+ int ignore_warning;
+}
+jmpbuf_wrapper;
+
+static void jpeg_emit_message(j_common_ptr jpeg_info, int level)
+{
+ char message[JMSG_LENGTH_MAX];
+ jmpbuf_wrapper *jmpbufw;
+ int ignore_warning = 0;
+
+ jmpbufw = (jmpbuf_wrapper *) jpeg_info->client_data;
+
+ if (jmpbufw != 0) {
+ ignore_warning = jmpbufw->ignore_warning;
+ }
+
+ (jpeg_info->err->format_message)(jpeg_info,message);
+
+ /* It is a warning message */
+ if (level < 0) {
+ /* display only the 1st warning, as would do a default libjpeg
+ * unless strace_level >= 3
+ */
+ if ((jpeg_info->err->num_warnings == 0) || (jpeg_info->err->trace_level >= 3)) {
+ if (!ignore_warning) {
+ gd_error("gd-jpeg, libjpeg: recoverable error: %s\n", message);
+ }
+ }
+
+ jpeg_info->err->num_warnings++;
+ } else {
+ /* strace msg, Show it if trace_level >= level. */
+ if (jpeg_info->err->trace_level >= level) {
+ if (!ignore_warning) {
+ gd_error("gd-jpeg, libjpeg: strace message: %s\n", message);
+ }
+ }
+ }
+}
+
+/* Called by the IJG JPEG library upon encountering a fatal error */
+static void fatal_jpeg_error(j_common_ptr cinfo)
+{
+ jmpbuf_wrapper *jmpbufw;
+ char buffer[JMSG_LENGTH_MAX];
+
+ (*cinfo->err->format_message)(cinfo, buffer);
+ gd_error_ex(GD_ERROR, "gd-jpeg: JPEG library reports unrecoverable error: %s", buffer);
+
+ jmpbufw = (jmpbuf_wrapper *)cinfo->client_data;
+ jpeg_destroy(cinfo);
+
+ if(jmpbufw != 0) {
+ longjmp(jmpbufw->jmpbuf, 1);
+ gd_error_ex(GD_ERROR, "gd-jpeg: EXTREMELY fatal error: longjmp returned control; terminating\n");
+ } else {
+ gd_error_ex(GD_ERROR, "gd-jpeg: EXTREMELY fatal error: jmpbuf unrecoverable; terminating\n");
+ }
+
+ exit(99);
+}
+
+/*
+ * Write IM to OUTFILE as a JFIF-formatted JPEG image, using quality
+ * QUALITY. If QUALITY is in the range 0-100, increasing values
+ * represent higher quality but also larger image size. If QUALITY is
+ * negative, the IJG JPEG library's default quality is used (which
+ * should be near optimal for many applications). See the IJG JPEG
+ * library documentation for more details.
+ */
+
+
+/*
+ Function: gdImageJpeg
+
+ <gdImageJpeg> outputs the specified image to the specified file in
+ JPEG format. The file must be open for writing. Under MSDOS and
+ all versions of Windows, it is important to use "wb" as opposed to
+ simply "w" as the mode when opening the file, and under Unix there
+ is no penalty for doing so. <gdImageJpeg> does not close the file;
+ your code must do so.
+
+ If _quality_ is negative, the default IJG JPEG quality value (which
+ should yield a good general quality / size tradeoff for most
+ situations) is used. Otherwise, for practical purposes, _quality_
+ should be a value in the range 0-95, higher quality values usually
+ implying both higher quality and larger image sizes.
+
+ If you have set image interlacing using <gdImageInterlace>, this
+ function will interpret that to mean you wish to output a
+ progressive JPEG. Some programs (e.g., Web browsers) can display
+ progressive JPEGs incrementally; this can be useful when browsing
+ over a relatively slow communications link, for
+ example. Progressive JPEGs can also be slightly smaller than
+ sequential (non-progressive) JPEGs.
+
+ Variants:
+
+ <gdImageJpegCtx> stores the image using a <gdIOCtx> struct.
+
+ <gdImageJpegPtr> stores the image to RAM.
+
+ Parameters:
+
+ im - The image to save
+ outFile - The FILE pointer to write to.
+ quality - Compression quality (0-95, 0 means use the default).
+
+ Returns:
+
+ Nothing.
+
+ Example:
+
+ > gdImagePtr im;
+ > int black, white;
+ > FILE *out;
+ > // Create the image
+ > im = gdImageCreate(100, 100);
+ > // Allocate background
+ > white = gdImageColorAllocate(im, 255, 255, 255);
+ > // Allocate drawing color
+ > black = gdImageColorAllocate(im, 0, 0, 0);
+ > // Draw rectangle
+ > gdImageRectangle(im, 0, 0, 99, 99, black);
+ > // Open output file in binary mode
+ > out = fopen("rect.jpg", "wb");
+ > // Write JPEG using default quality
+ > gdImageJpeg(im, out, -1);
+ > // Close file
+ > fclose(out);
+ > // Destroy image
+ > gdImageDestroy(im);
+
+*/
+
+BGD_DECLARE(void) gdImageJpeg(gdImagePtr im, FILE *outFile, int quality)
+{
+ gdIOCtx *out = gdNewFileCtx(outFile);
+ if (out == NULL) return;
+ gdImageJpegCtx(im, out, quality);
+ out->gd_free(out);
+}
+
+/*
+ Function: gdImageJpegPtr
+
+ Identical to <gdImageJpeg> except that it returns a pointer to a
+ memory area with the JPEG data. This memory must be freed by the
+ caller when it is no longer needed.
+
+ The caller *must* invoke <gdFree>, not free(). This is because it
+ is not guaranteed that libgd will use the same implementation of
+ malloc, free, etc. as your proggram.
+
+ The 'size' parameter receives the total size of the block of
+ memory.
+
+ Parameters:
+
+ im - The image to write
+ size - Output: the size of the resulting image.
+ quality - Compression quality.
+
+ Returns:
+
+ A pointer to the JPEG data or NULL if an error occurred.
+
+*/
+BGD_DECLARE(void *) gdImageJpegPtr(gdImagePtr im, int *size, int quality)
+{
+ void *rv;
+ gdIOCtx *out = gdNewDynamicCtx(2048, NULL);
+ if (out == NULL) return NULL;
+ gdImageJpegCtx(im, out, quality);
+ rv = gdDPExtractData(out, size);
+ out->gd_free(out);
+ return rv;
+}
+
+void jpeg_gdIOCtx_dest(j_compress_ptr cinfo, gdIOCtx *outfile);
+
+/*
+ Function: gdImageJpegCtx
+
+ Write the image as JPEG data via a <gdIOCtx>. See <gdImageJpeg>
+ for more details.
+
+ Parameters:
+
+ im - The image to write.
+ outfile - The output sink.
+ quality - Image quality.
+
+*/
+BGD_DECLARE(void) gdImageJpegCtx(gdImagePtr im, gdIOCtx *outfile, int quality)
+{
+ struct jpeg_compress_struct cinfo;
+ struct jpeg_error_mgr jerr;
+ int i, j, jidx;
+ /* volatile so we can gdFree it on return from longjmp */
+ volatile JSAMPROW row = 0;
+ JSAMPROW rowptr[1];
+ jmpbuf_wrapper jmpbufw;
+ JDIMENSION nlines;
+ char comment[255];
+
+#ifdef JPEG_DEBUG
+ gd_error_ex(GD_DEBUG, "gd-jpeg: gd JPEG version %s\n", GD_JPEG_VERSION);
+ gd_error_ex(GD_DEBUG, "gd-jpeg: JPEG library version %d, %d-bit sample values\n", JPEG_LIB_VERSION, BITS_IN_JSAMPLE);
+ if (!im->trueColor) {
+ for(i = 0; i < im->colorsTotal; i++) {
+ if(!im->open[i]) {
+ gd_error_ex(GD_DEBUG, "gd-jpeg: gd colormap index %d: (%d, %d, %d)\n", i, im->red[i], im->green[i], im->blue[i]);
+ }
+ }
+ }
+#endif /* JPEG_DEBUG */
+
+ memset(&cinfo, 0, sizeof(cinfo));
+ memset(&jerr, 0, sizeof(jerr));
+
+ cinfo.err = jpeg_std_error(&jerr);
+ cinfo.client_data = &jmpbufw;
+
+ if(setjmp(jmpbufw.jmpbuf) != 0) {
+ /* we're here courtesy of longjmp */
+ if(row) {
+ gdFree(row);
+ }
+ return;
+ }
+
+ cinfo.err->emit_message = jpeg_emit_message;
+ cinfo.err->error_exit = fatal_jpeg_error;
+
+ jpeg_create_compress(&cinfo);
+
+ cinfo.image_width = im->sx;
+ cinfo.image_height = im->sy;
+ cinfo.input_components = 3; /* # of color components per pixel */
+ cinfo.in_color_space = JCS_RGB; /* colorspace of input image */
+
+ jpeg_set_defaults(&cinfo);
+
+ cinfo.density_unit = 1;
+ cinfo.X_density = im->res_x;
+ cinfo.Y_density = im->res_y;
+
+ if(quality >= 0) {
+ jpeg_set_quality(&cinfo, quality, TRUE);
+ }
+
+ /* If user requests interlace, translate that to progressive JPEG */
+ if(gdImageGetInterlaced(im)) {
+#ifdef JPEG_DEBUG
+ gd_error_ex(GD_DEBUG, "gd-jpeg: interlace set, outputting progressive JPEG image\n");
+#endif
+ jpeg_simple_progression(&cinfo);
+ }
+
+ jpeg_gdIOCtx_dest(&cinfo, outfile);
+
+ row = (JSAMPROW)gdCalloc(1, cinfo.image_width * cinfo.input_components * sizeof(JSAMPLE));
+ if(row == 0) {
+ gd_error("gd-jpeg: error: unable to allocate JPEG row structure: gdCalloc returns NULL\n");
+ jpeg_destroy_compress(&cinfo);
+ return;
+ }
+
+ rowptr[0] = row;
+
+ jpeg_start_compress(&cinfo, TRUE);
+
+ sprintf(comment, "CREATOR: gd-jpeg v%s (using IJG JPEG v%d),", GD_JPEG_VERSION, JPEG_LIB_VERSION);
+
+ if(quality >= 0) {
+ sprintf (comment + strlen(comment), " quality = %d\n", quality);
+ } else {
+ strcat(comment + strlen(comment), " default quality\n");
+ }
+
+ jpeg_write_marker(&cinfo, JPEG_COM, (unsigned char *) comment, (unsigned int)strlen(comment));
+
+ if(im->trueColor) {
+#if BITS_IN_JSAMPLE == 12
+ gd_error(
+ "gd-jpeg: error: jpeg library was compiled for 12-bit\n"
+ "precision. This is mostly useless, because JPEGs on the web are\n"
+ "8-bit and such versions of the jpeg library won't read or write\n"
+ "them. GD doesn't support these unusual images. Edit your\n"
+ "jmorecfg.h file to specify the correct precision and completely\n"
+ "'make clean' and 'make install' libjpeg again. Sorry.\n"
+ );
+ goto error;
+#endif /* BITS_IN_JSAMPLE == 12 */
+ for(i = 0; i < im->sy; i++) {
+ for(jidx = 0, j = 0; j < im->sx; j++) {
+ int val = im->tpixels[i][j];
+ row[jidx++] = gdTrueColorGetRed(val);
+ row[jidx++] = gdTrueColorGetGreen(val);
+ row[jidx++] = gdTrueColorGetBlue(val);
+ }
+
+ nlines = jpeg_write_scanlines(&cinfo, rowptr, 1);
+
+ if(nlines != 1) {
+ gd_error("gd_jpeg: warning: jpeg_write_scanlines returns %u -- expected 1\n", nlines);
+ }
+ }
+ } else {
+ for(i = 0; i < im->sy; i++) {
+ for(jidx = 0, j = 0; j < im->sx; j++) {
+ int idx = im->pixels[i][j];
+
+ /*
+ * NB: Although gd RGB values are ints, their max value is
+ * 255 (see the documentation for gdImageColorAllocate())
+ * -- perfect for 8-bit JPEG encoding (which is the norm)
+ */
+#if BITS_IN_JSAMPLE == 8
+ row[jidx++] = im->red[idx];
+ row[jidx++] = im->green[idx];
+ row[jidx++] = im->blue[idx];
+#elif BITS_IN_JSAMPLE == 12
+ row[jidx++] = im->red[idx] << 4;
+ row[jidx++] = im->green[idx] << 4;
+ row[jidx++] = im->blue[idx] << 4;
+#else
+#error IJG JPEG library BITS_IN_JSAMPLE value must be 8 or 12
+#endif
+ }
+
+ nlines = jpeg_write_scanlines(&cinfo, rowptr, 1);
+ if(nlines != 1) {
+ gd_error("gd_jpeg: warning: jpeg_write_scanlines"
+ " returns %u -- expected 1\n", nlines);
+ }
+ }
+ }
+
+ jpeg_finish_compress(&cinfo);
+ jpeg_destroy_compress(&cinfo);
+ gdFree(row);
+}
+
+
+
+
+/*
+ Function: gdImageCreateFromJpeg
+
+ See <gdImageCreateFromJpegEx>.
+*/
+BGD_DECLARE(gdImagePtr) gdImageCreateFromJpeg(FILE *inFile)
+{
+ return gdImageCreateFromJpegEx(inFile, 1);
+}
+
+
+/*
+ Function: gdImageCreateFromJpegEx
+
+ <gdImageCreateFromJpegEx> is called to load truecolor images from
+ JPEG format files. Invoke <gdImageCreateFromJpegEx> with an
+ already opened pointer to a file containing the desired
+ image. <gdImageCreateFromJpegEx> returns a <gdImagePtr> to the new
+ truecolor image, or NULL if unable to load the image (most often
+ because the file is corrupt or does not contain a JPEG
+ image). <gdImageCreateFromJpegEx> does not close the file.
+
+ You can inspect the sx and sy members of the image to determine
+ its size. The image must eventually be destroyed using
+ <gdImageDestroy>.
+
+ *The returned image is always a truecolor image.*
+
+ Variants:
+
+ <gdImageCreateFromJpegPtrEx> creates an image from JPEG data
+ already in memory.
+
+ <gdImageCreateFromJpegCtxEx> reads its data via the function
+ pointers in a <gdIOCtx> structure.
+
+ <gdImageCreateFromJpeg>, <gdImageCreateFromJpegPtr> and
+ <gdImageCreateFromJpegCtx> are equivalent to calling their
+ _Ex_-named counterparts with an ignore_warning set to 1
+ (i.e. TRUE).
+
+ Parameters:
+
+ infile - The input FILE pointer.
+ ignore_warning - Flag. If true, ignores recoverable warnings.
+
+ Returns:
+
+ A pointer to the new *truecolor* image. This will need to be
+ destroyed with <gdImageDestroy> once it is no longer needed.
+
+ On error, returns NULL.
+
+ Example:
+
+ > gdImagePtr im;
+ > FILE *in;
+ > in = fopen("myjpeg.jpg", "rb");
+ > im = gdImageCreateFromJpegEx(in, GD_TRUE);
+ > fclose(in);
+ > // ... Use the image ...
+ > gdImageDestroy(im);
+
+*/
+BGD_DECLARE(gdImagePtr) gdImageCreateFromJpegEx(FILE *inFile, int ignore_warning)
+{
+ gdImagePtr im;
+ gdIOCtx *in = gdNewFileCtx(inFile);
+ if (in == NULL) return NULL;
+ im = gdImageCreateFromJpegCtxEx(in, ignore_warning);
+ in->gd_free(in);
+ return im;
+}
+
+/*
+ Function: gdImageCreateFromJpegPtr
+
+ Parameters:
+
+ size - size of JPEG data in bytes.
+ data - pointer to JPEG data.
+
+ See <gdImageCreateFromJpegEx>.
+*/
+BGD_DECLARE(gdImagePtr) gdImageCreateFromJpegPtr(int size, void *data)
+{
+ return gdImageCreateFromJpegPtrEx(size, data, 1);
+}
+
+/*
+ Function: gdImageCreateFromJpegPtrEx
+
+ Parameters:
+
+ size - size of JPEG data in bytes.
+ data - pointer to JPEG data.
+ ignore_warning - if true, ignore recoverable warnings
+
+ See <gdImageCreateFromJpegEx>.
+*/
+BGD_DECLARE(gdImagePtr) gdImageCreateFromJpegPtrEx(int size, void *data, int ignore_warning)
+{
+ gdImagePtr im;
+ gdIOCtx *in = gdNewDynamicCtxEx(size, data, 0);
+ if(!in) {
+ return 0;
+ }
+ im = gdImageCreateFromJpegCtxEx(in, ignore_warning);
+ in->gd_free(in);
+ return im;
+}
+
+void jpeg_gdIOCtx_src(j_decompress_ptr cinfo, gdIOCtx *infile);
+
+static int CMYKToRGB(int c, int m, int y, int k, int inverted);
+
+/*
+ Function: gdImageCreateFromJpegCtx
+
+ See <gdImageCreateFromJpeg>.
+*/
+BGD_DECLARE(gdImagePtr) gdImageCreateFromJpegCtx(gdIOCtx *infile)
+{
+ return gdImageCreateFromJpegCtxEx(infile, 1);
+}
+
+/*
+ Function: gdImageCreateFromJpegCtxEx
+
+ See <gdImageCreateFromJpeg>.
+*/
+BGD_DECLARE(gdImagePtr) gdImageCreateFromJpegCtxEx(gdIOCtx *infile, int ignore_warning)
+{
+ struct jpeg_decompress_struct cinfo;
+ struct jpeg_error_mgr jerr;
+ jmpbuf_wrapper jmpbufw;
+ /* volatile so we can gdFree them after longjmp */
+ volatile JSAMPROW row = 0;
+ volatile gdImagePtr im = 0;
+ JSAMPROW rowptr[1];
+ JDIMENSION i, j;
+ int retval;
+ JDIMENSION nrows;
+ int channels = 3;
+ int inverted = 0;
+
+#ifdef JPEG_DEBUG
+ gd_error_ex(GD_DEBUG, "gd-jpeg: gd JPEG version %s\n", GD_JPEG_VERSION);
+ gd_error_ex(GD_DEBUG, "gd-jpeg: JPEG library version %d, %d-bit sample values\n", JPEG_LIB_VERSION, BITS_IN_JSAMPLE);
+ gd_error_ex(GD_DEBUG, "sizeof: %d\n", sizeof(struct jpeg_decompress_struct));
+#endif
+
+ memset(&cinfo, 0, sizeof(cinfo));
+ memset(&jerr, 0, sizeof(jerr));
+
+ jmpbufw.ignore_warning = ignore_warning;
+
+ cinfo.err = jpeg_std_error(&jerr);
+ cinfo.client_data = &jmpbufw;
+
+ cinfo.err->emit_message = jpeg_emit_message;
+
+ if(setjmp(jmpbufw.jmpbuf) != 0) {
+ /* we're here courtesy of longjmp */
+ if(row) {
+ gdFree(row);
+ }
+ if(im) {
+ gdImageDestroy(im);
+ }
+ return 0;
+ }
+
+ cinfo.err->error_exit = fatal_jpeg_error;
+
+ jpeg_create_decompress(&cinfo);
+
+ jpeg_gdIOCtx_src(&cinfo, infile);
+
+ /* 2.0.22: save the APP14 marker to check for Adobe Photoshop CMYK
+ * files with inverted components.
+ */
+ jpeg_save_markers(&cinfo, JPEG_APP0 + 14, 256);
+
+ retval = jpeg_read_header(&cinfo, TRUE);
+ if(retval != JPEG_HEADER_OK) {
+ gd_error("gd-jpeg: warning: jpeg_read_header returns"
+ " %d, expected %d\n", retval, JPEG_HEADER_OK);
+ }
+
+ if(cinfo.image_height > INT_MAX) {
+ gd_error("gd-jpeg: warning: JPEG image height (%u) is"
+ " greater than INT_MAX (%d) (and thus greater than"
+ " gd can handle)", cinfo.image_height, INT_MAX);
+ }
+
+ if(cinfo.image_width > INT_MAX) {
+ gd_error("gd-jpeg: warning: JPEG image width (%u) is"
+ " greater than INT_MAX (%d) (and thus greater than"
+ " gd can handle)\n", cinfo.image_width, INT_MAX);
+ }
+
+ im = gdImageCreateTrueColor((int)cinfo.image_width, (int)cinfo.image_height);
+ if(im == 0) {
+ gd_error("gd-jpeg error: cannot allocate gdImage struct\n");
+ goto error;
+ }
+
+ /* check if the resolution is specified */
+ switch (cinfo.density_unit) {
+ case 1:
+ im->res_x = cinfo.X_density;
+ im->res_y = cinfo.Y_density;
+ break;
+ case 2:
+ im->res_x = DPCM2DPI(cinfo.X_density);
+ im->res_y = DPCM2DPI(cinfo.Y_density);
+ break;
+ }
+
+ /* 2.0.22: very basic support for reading CMYK colorspace files. Nice for
+ * thumbnails but there's no support for fussy adjustment of the
+ * assumed properties of inks and paper.
+ */
+ if((cinfo.jpeg_color_space == JCS_CMYK) || (cinfo.jpeg_color_space == JCS_YCCK)) {
+ cinfo.out_color_space = JCS_CMYK;
+ } else {
+ cinfo.out_color_space = JCS_RGB;
+ }
+
+ if(jpeg_start_decompress(&cinfo) != TRUE) {
+ gd_error("gd-jpeg: warning: jpeg_start_decompress"
+ " reports suspended data source\n");
+ }
+
+#ifdef JPEG_DEBUG
+ gd_error_ex(GD_DEBUG, "gd-jpeg: JPEG image information:");
+ if(cinfo.saw_JFIF_marker) {
+ gd_error_ex(GD_DEBUG, " JFIF version %d.%.2d", (int)cinfo.JFIF_major_version, (int)cinfo.JFIF_minor_version);
+ } else if(cinfo.saw_Adobe_marker) {
+ gd_error_ex(GD_DEBUG, " Adobe format");
+ } else {
+ gd_error_ex(GD_DEBUG, " UNKNOWN format");
+ }
+
+ gd_error_ex(GD_DEBUG, " %ux%u (raw) / %ux%u (scaled) %d-bit", cinfo.image_width,
+ cinfo.image_height, cinfo.output_width,
+ cinfo.output_height, cinfo.data_precision
+ );
+ gd_error_ex(GD_DEBUG, " %s", (cinfo.progressive_mode ? "progressive" : "baseline"));
+ gd_error_ex(GD_DEBUG, " image, %d quantized colors, ", cinfo.actual_number_of_colors);
+
+ switch(cinfo.jpeg_color_space) {
+ case JCS_GRAYSCALE:
+ gd_error_ex(GD_DEBUG, "grayscale");
+ break;
+
+ case JCS_RGB:
+ gd_error_ex(GD_DEBUG, "RGB");
+ break;
+
+ case JCS_YCbCr:
+ gd_error_ex(GD_DEBUG, "YCbCr (a.k.a. YUV)");
+ break;
+
+ case JCS_CMYK:
+ gd_error_ex(GD_DEBUG, "CMYK");
+ break;
+
+ case JCS_YCCK:
+ gd_error_ex(GD_DEBUG, "YCbCrK");
+ break;
+
+ default:
+ gd_error_ex(GD_DEBUG, "UNKNOWN (value: %d)", (int)cinfo.jpeg_color_space);
+ break;
+ }
+
+ gd_error_ex(GD_DEBUG, " colorspace\n");
+ fflush(stdout);
+#endif /* JPEG_DEBUG */
+
+ /* REMOVED by TBB 2/12/01. This field of the structure is
+ * documented as private, and sure enough it's gone in the
+ * latest libjpeg, replaced by something else. Unfortunately
+ * there is still no right way to find out if the file was
+ * progressive or not; just declare your intent before you
+ * write one by calling gdImageInterlace(im, 1) yourself.
+ * After all, we're not really supposed to rework JPEGs and
+ * write them out again anyway. Lossy compression, remember? */
+#if 0
+ gdImageInterlace (im, cinfo.progressive_mode != 0);
+#endif
+ if(cinfo.out_color_space == JCS_RGB) {
+ if(cinfo.output_components != 3) {
+ gd_error("gd-jpeg: error: JPEG color quantization"
+ " request resulted in output_components == %d"
+ " (expected 3 for RGB)\n", cinfo.output_components);
+ goto error;
+ }
+ channels = 3;
+ } else if(cinfo.out_color_space == JCS_CMYK) {
+ jpeg_saved_marker_ptr marker;
+ if(cinfo.output_components != 4) {
+ gd_error("gd-jpeg: error: JPEG color quantization"
+ " request resulted in output_components == %d"
+ " (expected 4 for CMYK)\n", cinfo.output_components);
+ goto error;
+ }
+ channels = 4;
+
+ marker = cinfo.marker_list;
+ while(marker) {
+ if( (marker->marker == (JPEG_APP0 + 14)) &&
+ (marker->data_length >= 12) &&
+ (!strncmp((const char *)marker->data, "Adobe", 5))) {
+ inverted = 1;
+ break;
+ }
+ marker = marker->next;
+ }
+ } else {
+ gd_error("gd-jpeg: error: unexpected colorspace\n");
+ goto error;
+ }
+#if BITS_IN_JSAMPLE == 12
+ gd_error_ex(GD_ERROR,
+ "gd-jpeg: error: jpeg library was compiled for 12-bit\n"
+ "precision. This is mostly useless, because JPEGs on the web are\n"
+ "8-bit and such versions of the jpeg library won't read or write\n"
+ "them. GD doesn't support these unusual images. Edit your\n"
+ "jmorecfg.h file to specify the correct precision and completely\n"
+ "'make clean' and 'make install' libjpeg again. Sorry.\n");
+ goto error;
+#endif /* BITS_IN_JSAMPLE == 12 */
+
+ row = gdCalloc(cinfo.output_width *channels, sizeof(JSAMPLE));
+ if(row == 0) {
+ gd_error("gd-jpeg: error: unable to allocate row for"
+ " JPEG scanline: gdCalloc returns NULL\n");
+ goto error;
+ }
+ rowptr[0] = row;
+ if(cinfo.out_color_space == JCS_CMYK) {
+ for(i = 0; i < cinfo.output_height; i++) {
+ register JSAMPROW currow = row;
+ register int *tpix = im->tpixels[i];
+ nrows = jpeg_read_scanlines(&cinfo, rowptr, 1);
+ if(nrows != 1) {
+ gd_error("gd-jpeg: error: jpeg_read_scanlines"
+ " returns %u, expected 1\n", nrows);
+ goto error;
+ }
+ for(j = 0; j < cinfo.output_width; j++, currow += 4, tpix++) {
+ *tpix = CMYKToRGB(currow[0], currow[1], currow[2], currow[3], inverted);
+ }
+ }
+ } else {
+ for(i = 0; i < cinfo.output_height; i++) {
+ register JSAMPROW currow = row;
+ register int *tpix = im->tpixels[i];
+ nrows = jpeg_read_scanlines(&cinfo, rowptr, 1);
+ if(nrows != 1) {
+ gd_error("gd-jpeg: error: jpeg_read_scanlines"
+ " returns %u, expected 1\n", nrows);
+ goto error;
+ }
+ for(j = 0; j < cinfo.output_width; j++, currow += 3, tpix++) {
+ *tpix = gdTrueColor(currow[0], currow[1], currow[2]);
+ }
+ }
+ }
+
+ if(jpeg_finish_decompress (&cinfo) != TRUE) {
+ gd_error("gd-jpeg: warning: jpeg_finish_decompress"
+ " reports suspended data source\n");
+ }
+ /* TBB 2.0.29: we should do our best to read whatever we can read, and a
+ * warning is a warning. A fatal error on warnings doesn't make sense. */
+#if 0
+ /* This was originally added by Truxton Fulton */
+ if (cinfo.err->num_warnings > 0)
+ goto error;
+#endif
+
+ jpeg_destroy_decompress(&cinfo);
+ gdFree(row);
+ return im;
+
+error:
+ jpeg_destroy_decompress(&cinfo);
+
+ if(row) {
+ gdFree(row);
+ }
+ if(im) {
+ gdImageDestroy(im);
+ }
+
+ return 0;
+}
+
+/* A very basic conversion approach, TBB */
+
+static int CMYKToRGB(int c, int m, int y, int k, int inverted)
+{
+ if(inverted) {
+ c = 255 - c;
+ m = 255 - m;
+ y = 255 - y;
+ k = 255 - k;
+ }
+
+ return gdTrueColor(
+ (255 - c) * (255 - k) / 255,
+ (255 - m) * (255 - k) / 255,
+ (255 - y) * (255 - k) / 255
+ );
+#if 0
+ if (inverted) {
+ c = 255 - c;
+ m = 255 - m;
+ y = 255 - y;
+ k = 255 - k;
+ }
+ c = c * (255 - k) / 255 + k;
+ if (c > 255) {
+ c = 255;
+ }
+ if (c < 0) {
+ c = 0;
+ }
+ m = m * (255 - k) / 255 + k;
+ if (m > 255) {
+ m = 255;
+ }
+ if (m < 0) {
+ m = 0;
+ }
+ y = y * (255 - k) / 255 + k;
+ if (y > 255) {
+ y = 255;
+ }
+ if (y < 0) {
+ y = 0;
+ }
+ c = 255 - c;
+ m = 255 - m;
+ y = 255 - y;
+ return gdTrueColor (c, m, y);
+#endif
+}
+
+/*
+ * gdIOCtx JPEG data sources and sinks, T. Boutell
+ * almost a simple global replace from T. Lane's stdio versions.
+ */
+
+/* Different versions of libjpeg use either 'jboolean' or 'boolean', and
+ * some platforms define 'boolean', and so forth. Deal with this
+ * madness by typedeffing 'safeboolean' to 'boolean' if HAVE_BOOLEAN
+ * is already set, because this is the test that libjpeg uses.
+ * Otherwise, typedef it to int, because that's what libjpeg does
+ * if HAVE_BOOLEAN is not defined. -TBB
+ */
+
+#ifdef HAVE_BOOLEAN
+typedef boolean safeboolean;
+#else
+typedef int safeboolean;
+#endif /* HAVE_BOOLEAN */
+
+/* Expanded data source object for gdIOCtx input */
+typedef struct {
+ struct jpeg_source_mgr pub; /* public fields */
+ gdIOCtx *infile; /* source stream */
+ unsigned char *buffer; /* start of buffer */
+ safeboolean start_of_file; /* have we gotten any data yet? */
+}
+my_source_mgr;
+
+typedef my_source_mgr *my_src_ptr;
+
+#define INPUT_BUF_SIZE 4096 /* choose an efficiently fread'able size */
+
+/*
+ * Initialize source --- called by jpeg_read_header
+ * before any data is actually read.
+ */
+
+void init_source(j_decompress_ptr cinfo)
+{
+ my_src_ptr src = (my_src_ptr)cinfo->src;
+
+ /* We reset the empty-input-file flag for each image,
+ * but we don't clear the input buffer.
+ * This is correct behavior for reading a series of images from one source.
+ */
+ src->start_of_file = TRUE;
+}
+
+
+/*
+ * Fill the input buffer --- called whenever buffer is emptied.
+ *
+ * In typical applications, this should read fresh data into the buffer
+ * (ignoring the current state of next_input_byte & bytes_in_buffer),
+ * reset the pointer & count to the start of the buffer, and return TRUE
+ * indicating that the buffer has been reloaded. It is not necessary to
+ * fill the buffer entirely, only to obtain at least one more byte.
+ *
+ * There is no such thing as an EOF return. If the end of the file has been
+ * reached, the routine has a choice of ERREXIT() or inserting fake data into
+ * the buffer. In most cases, generating a warning message and inserting a
+ * fake EOI marker is the best course of action --- this will allow the
+ * decompressor to output however much of the image is there. However,
+ * the resulting error message is misleading if the real problem is an empty
+ * input file, so we handle that case specially.
+ *
+ * In applications that need to be able to suspend compression due to input
+ * not being available yet, a FALSE return indicates that no more data can be
+ * obtained right now, but more may be forthcoming later. In this situation,
+ * the decompressor will return to its caller (with an indication of the
+ * number of scanlines it has read, if any). The application should resume
+ * decompression after it has loaded more data into the input buffer. Note
+ * that there are substantial restrictions on the use of suspension --- see
+ * the documentation.
+ *
+ * When suspending, the decompressor will back up to a convenient restart point
+ * (typically the start of the current MCU). next_input_byte & bytes_in_buffer
+ * indicate where the restart point will be if the current call returns FALSE.
+ * Data beyond this point must be rescanned after resumption, so move it to
+ * the front of the buffer rather than discarding it.
+ */
+
+#define END_JPEG_SEQUENCE "\r\n[*]--:END JPEG:--[*]\r\n"
+
+safeboolean fill_input_buffer(j_decompress_ptr cinfo)
+{
+ my_src_ptr src = (my_src_ptr)cinfo->src;
+ /* 2.0.12: signed size. Thanks to Geert Jansen */
+ /* 2.0.14: some platforms (mingw-msys) don't have ssize_t. Call
+ * an int an int.
+ */
+ int nbytes = 0;
+ memset(src->buffer, 0, INPUT_BUF_SIZE);
+
+ while(nbytes < INPUT_BUF_SIZE) {
+ int got = gdGetBuf(src->buffer + nbytes, INPUT_BUF_SIZE - nbytes, src->infile);
+
+ if((got == EOF) || (got == 0)) {
+ /* EOF or error. If we got any data, don't worry about it.
+ * If we didn't, then this is unexpected. */
+ if(!nbytes) {
+ nbytes = -1;
+ }
+ break;
+ }
+ nbytes += got;
+ }
+
+ if(nbytes <= 0) {
+ if(src->start_of_file) {
+ /* Treat empty input file as fatal error */
+ ERREXIT(cinfo, JERR_INPUT_EMPTY);
+ }
+ WARNMS(cinfo, JWRN_JPEG_EOF);
+ /* Insert a fake EOI marker */
+ src->buffer[0] = (unsigned char)0xFF;
+ src->buffer[1] = (unsigned char)JPEG_EOI;
+ nbytes = 2;
+ }
+
+ src->pub.next_input_byte = src->buffer;
+ src->pub.bytes_in_buffer = nbytes;
+ src->start_of_file = FALSE;
+
+ return TRUE;
+}
+
+/*
+ * Skip data --- used to skip over a potentially large amount of
+ * uninteresting data (such as an APPn marker).
+ *
+ * Writers of suspendable-input applications must note that skip_input_data
+ * is not granted the right to give a suspension return. If the skip extends
+ * beyond the data currently in the buffer, the buffer can be marked empty so
+ * that the next read will cause a fill_input_buffer call that can suspend.
+ * Arranging for additional bytes to be discarded before reloading the input
+ * buffer is the application writer's problem.
+ */
+
+void skip_input_data(j_decompress_ptr cinfo, long num_bytes)
+{
+ my_src_ptr src = (my_src_ptr)cinfo->src;
+
+ /* Just a dumb implementation for now. Not clear that being smart is worth
+ * any trouble anyway --- large skips are infrequent.
+ */
+ if(num_bytes > 0) {
+ while(num_bytes > (long)src->pub.bytes_in_buffer) {
+ num_bytes -= (long)src->pub.bytes_in_buffer;
+ (void)fill_input_buffer(cinfo);
+ /* note we assume that fill_input_buffer will never return FALSE,
+ * so suspension need not be handled.
+ */
+ }
+ src->pub.next_input_byte += (size_t)num_bytes;
+ src->pub.bytes_in_buffer -= (size_t)num_bytes;
+ }
+}
+
+/*
+ * An additional method that can be provided by data source modules is the
+ * resync_to_restart method for error recovery in the presence of RST markers.
+ * For the moment, this source module just uses the default resync method
+ * provided by the JPEG library. That method assumes that no backtracking
+ * is possible.
+ */
+
+/*
+ * Terminate source --- called by jpeg_finish_decompress
+ * after all data has been read. Often a no-op.
+ *
+ * NB: *not* called by jpeg_abort or jpeg_destroy; surrounding
+ * application must deal with any cleanup that should happen even
+ * for error exit.
+ */
+void term_source(j_decompress_ptr cinfo)
+{
+ (void)cinfo;
+}
+
+
+/*
+ * Prepare for input from a gdIOCtx stream.
+ * The caller must have already opened the stream, and is responsible
+ * for closing it after finishing decompression.
+ */
+
+void jpeg_gdIOCtx_src(j_decompress_ptr cinfo, gdIOCtx *infile)
+{
+ my_src_ptr src;
+
+ /* The source object and input buffer are made permanent so that a series
+ * of JPEG images can be read from the same file by calling jpeg_gdIOCtx_src
+ * only before the first one. (If we discarded the buffer at the end of
+ * one image, we'd likely lose the start of the next one.)
+ * This makes it unsafe to use this manager and a different source
+ * manager serially with the same JPEG object. Caveat programmer.
+ */
+ if(cinfo->src == NULL) {
+ /* first time for this JPEG object? */
+ cinfo->src = (struct jpeg_source_mgr *)
+ (*cinfo->mem->alloc_small)((j_common_ptr)cinfo, JPOOL_PERMANENT,
+ sizeof(my_source_mgr));
+ src = (my_src_ptr)cinfo->src;
+ src->buffer = (unsigned char *)
+ (*cinfo->mem->alloc_small)((j_common_ptr)cinfo, JPOOL_PERMANENT,
+ INPUT_BUF_SIZE * sizeof(unsigned char));
+ }
+
+ src = (my_src_ptr)cinfo->src;
+ src->pub.init_source = init_source;
+ src->pub.fill_input_buffer = fill_input_buffer;
+ src->pub.skip_input_data = skip_input_data;
+ src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */
+ src->pub.term_source = term_source;
+ src->infile = infile;
+ src->pub.bytes_in_buffer = 0; /* forces fill_input_buffer on first read */
+ src->pub.next_input_byte = NULL; /* until buffer loaded */
+}
+
+/* Expanded data destination object for stdio output */
+typedef struct {
+ struct jpeg_destination_mgr pub; /* public fields */
+ gdIOCtx *outfile; /* target stream */
+ unsigned char *buffer; /* start of buffer */
+}
+my_destination_mgr;
+
+typedef my_destination_mgr *my_dest_ptr;
+
+#define OUTPUT_BUF_SIZE 4096 /* choose an efficiently fwrite'able size */
+
+/*
+ * Initialize destination --- called by jpeg_start_compress
+ * before any data is actually written.
+ */
+
+void init_destination(j_compress_ptr cinfo)
+{
+ my_dest_ptr dest = (my_dest_ptr)cinfo->dest;
+
+ /* Allocate the output buffer --- it will be released when done with image */
+ dest->buffer = (unsigned char *)
+ (*cinfo->mem->alloc_small)((j_common_ptr)cinfo, JPOOL_IMAGE,
+ OUTPUT_BUF_SIZE * sizeof(unsigned char));
+
+ dest->pub.next_output_byte = dest->buffer;
+ dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
+}
+
+
+/*
+ * Empty the output buffer --- called whenever buffer fills up.
+ *
+ * In typical applications, this should write the entire output buffer
+ * (ignoring the current state of next_output_byte & free_in_buffer),
+ * reset the pointer & count to the start of the buffer, and return TRUE
+ * indicating that the buffer has been dumped.
+ *
+ * In applications that need to be able to suspend compression due to output
+ * overrun, a FALSE return indicates that the buffer cannot be emptied now.
+ * In this situation, the compressor will return to its caller (possibly with
+ * an indication that it has not accepted all the supplied scanlines). The
+ * application should resume compression after it has made more room in the
+ * output buffer. Note that there are substantial restrictions on the use of
+ * suspension --- see the documentation.
+ *
+ * When suspending, the compressor will back up to a convenient restart point
+ * (typically the start of the current MCU). next_output_byte & free_in_buffer
+ * indicate where the restart point will be if the current call returns FALSE.
+ * Data beyond this point will be regenerated after resumption, so do not
+ * write it out when emptying the buffer externally.
+ */
+
+safeboolean empty_output_buffer(j_compress_ptr cinfo)
+{
+ my_dest_ptr dest = (my_dest_ptr)cinfo->dest;
+
+ if(gdPutBuf(dest->buffer, OUTPUT_BUF_SIZE, dest->outfile) != (size_t)OUTPUT_BUF_SIZE) {
+ ERREXIT(cinfo, JERR_FILE_WRITE);
+ }
+
+ dest->pub.next_output_byte = dest->buffer;
+ dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
+
+ return TRUE;
+}
+
+
+/*
+ * Terminate destination --- called by jpeg_finish_compress
+ * after all data has been written. Usually needs to flush buffer.
+ *
+ * NB: *not* called by jpeg_abort or jpeg_destroy; surrounding
+ * application must deal with any cleanup that should happen even
+ * for error exit.
+ */
+
+void term_destination(j_compress_ptr cinfo)
+{
+ my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
+ int datacount = OUTPUT_BUF_SIZE - dest->pub.free_in_buffer;
+
+ /* Write any data remaining in the buffer */
+ if(datacount > 0) {
+ if(gdPutBuf(dest->buffer, datacount, dest->outfile) != datacount) {
+ ERREXIT(cinfo, JERR_FILE_WRITE);
+ }
+ }
+}
+
+/*
+ * Prepare for output to a stdio stream.
+ * The caller must have already opened the stream, and is responsible
+ * for closing it after finishing compression.
+ */
+
+void jpeg_gdIOCtx_dest(j_compress_ptr cinfo, gdIOCtx *outfile)
+{
+ my_dest_ptr dest;
+
+ /* The destination object is made permanent so that multiple JPEG images
+ * can be written to the same file without re-executing jpeg_stdio_dest.
+ * This makes it dangerous to use this manager and a different destination
+ * manager serially with the same JPEG object, because their private object
+ * sizes may be different. Caveat programmer.
+ */
+ if(cinfo->dest == NULL) {
+ /* first time for this JPEG object? */
+ cinfo->dest = (struct jpeg_destination_mgr *)
+ (*cinfo->mem->alloc_small)((j_common_ptr)cinfo, JPOOL_PERMANENT,
+ sizeof(my_destination_mgr));
+ }
+
+ dest = (my_dest_ptr)cinfo->dest;
+ dest->pub.init_destination = init_destination;
+ dest->pub.empty_output_buffer = empty_output_buffer;
+ dest->pub.term_destination = term_destination;
+ dest->outfile = outfile;
+}
+
+#endif /* HAVE_LIBJPEG */