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Diffstat (limited to 'Build/source/libs/gd/gd_jpeg.c')
-rw-r--r--Build/source/libs/gd/gd_jpeg.c990
1 files changed, 0 insertions, 990 deletions
diff --git a/Build/source/libs/gd/gd_jpeg.c b/Build/source/libs/gd/gd_jpeg.c
deleted file mode 100644
index defa3cfb769..00000000000
--- a/Build/source/libs/gd/gd_jpeg.c
+++ /dev/null
@@ -1,990 +0,0 @@
-/*
- * gd_jpeg.c: Read and write JPEG (JFIF) format image files using the
- * gd graphics library (http://www.boutell.com/gd/).
- *
- * 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 <stdio.h>
-#include <stdlib.h>
-#include <setjmp.h>
-#include <limits.h>
-#include <string.h>
-
-#include "gd.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"
-
-/* 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;
-}
-jmpbuf_wrapper;
-
-/* Called by the IJG JPEG library upon encountering a fatal error */
-static void
-fatal_jpeg_error (j_common_ptr cinfo)
-{
- jmpbuf_wrapper *jmpbufw;
-
- fprintf (stderr, "gd-jpeg: JPEG library reports unrecoverable error: ");
- (*cinfo->err->output_message) (cinfo);
- fflush (stderr);
-
- jmpbufw = (jmpbuf_wrapper *) cinfo->client_data;
- jpeg_destroy (cinfo);
-
- if (jmpbufw != 0)
- {
- longjmp (jmpbufw->jmpbuf, 1);
- fprintf (stderr, "gd-jpeg: EXTREMELY fatal error: longjmp"
- " returned control; terminating\n");
- }
- else
- {
- fprintf (stderr, "gd-jpeg: EXTREMELY fatal error: jmpbuf"
- " unrecoverable; terminating\n");
- }
-
- fflush (stderr);
- 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. */
-
-BGD_DECLARE(void) gdImageJpeg (gdImagePtr im, FILE * outFile, int quality)
-{
- gdIOCtx *out = gdNewFileCtx (outFile);
- gdImageJpegCtx (im, out, quality);
- out->gd_free (out);
-}
-
-BGD_DECLARE(void *) gdImageJpegPtr (gdImagePtr im, int *size, int quality)
-{
- void *rv;
- gdIOCtx *out = gdNewDynamicCtx (2048, 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);
-
-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
- printf ("gd-jpeg: gd JPEG version %s\n", GD_JPEG_VERSION);
- printf ("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])
- printf ("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->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);
- if (quality >= 0)
- jpeg_set_quality (&cinfo, quality, TRUE);
-
- /* If user requests interlace, translate that to progressive JPEG */
- if (gdImageGetInterlaced (im))
- {
-#ifdef JPEG_DEBUG
- printf ("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)
- {
- fprintf (stderr, "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
- fprintf (stderr,
- "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)
- fprintf (stderr, "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)
- fprintf (stderr, "gd_jpeg: warning: jpeg_write_scanlines"
- " returns %u -- expected 1\n", nlines);
- }
- }
- jpeg_finish_compress (&cinfo);
- jpeg_destroy_compress (&cinfo);
- gdFree (row);
-}
-
-BGD_DECLARE(gdImagePtr) gdImageCreateFromJpeg (FILE * inFile)
-{
- gdImagePtr im;
- gdIOCtx *in = gdNewFileCtx (inFile);
- im = gdImageCreateFromJpegCtx (in);
- in->gd_free (in);
- return im;
-}
-
-BGD_DECLARE(gdImagePtr) gdImageCreateFromJpegPtr (int size, void *data)
-{
- gdImagePtr im;
- gdIOCtx *in = gdNewDynamicCtxEx (size, data, 0);
- im = gdImageCreateFromJpegCtx (in);
- 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);
-
-/*
- * Create a gd-format image from the JPEG-format INFILE. Returns the
- * image, or NULL upon error.
- */
-BGD_DECLARE(gdImagePtr) gdImageCreateFromJpegCtx (gdIOCtx * infile)
-{
- 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];
- int i, j, retval;
- JDIMENSION nrows;
- int channels = 3;
- int inverted = 0;
-#ifdef JPEG_DEBUG
- printf ("gd-jpeg: gd JPEG version %s\n", GD_JPEG_VERSION);
- printf ("gd-jpeg: JPEG library version %d, %d-bit sample values\n",
- JPEG_LIB_VERSION, BITS_IN_JSAMPLE);
-#endif
-
- 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);
- 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)
- fprintf (stderr, "gd-jpeg: warning: jpeg_read_header returns"
- " %d, expected %d\n", retval, JPEG_HEADER_OK);
-
- if (cinfo.image_height > INT_MAX)
- fprintf (stderr, "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)
- fprintf (stderr, "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)
- {
- fprintf (stderr, "gd-jpeg error: cannot allocate gdImage" " struct\n");
- goto error;
- }
- /* 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)
- fprintf (stderr, "gd-jpeg: warning: jpeg_start_decompress"
- " reports suspended data source\n");
-
-#ifdef JPEG_DEBUG
- printf ("gd-jpeg: JPEG image information:");
- if (cinfo.saw_JFIF_marker)
- printf (" JFIF version %d.%.2d",
- (int) cinfo.JFIF_major_version, (int) cinfo.JFIF_minor_version);
- else if (cinfo.saw_Adobe_marker)
- printf (" Adobe format");
- else
- printf (" UNKNOWN format");
-
- printf (" %ux%u (raw) / %ux%u (scaled) %d-bit", cinfo.image_width,
- cinfo.image_height, cinfo.output_width,
- cinfo.output_height, cinfo.data_precision);
- printf (" %s", (cinfo.progressive_mode ? "progressive" : "baseline"));
- printf (" image, %d quantized colors, ", cinfo.actual_number_of_colors);
-
- switch (cinfo.jpeg_color_space)
- {
- case JCS_GRAYSCALE:
- printf ("grayscale");
- break;
-
- case JCS_RGB:
- printf ("RGB");
- break;
-
- case JCS_YCbCr:
- printf ("YCbCr (a.k.a. YUV)");
- break;
-
- case JCS_CMYK:
- printf ("CMYK");
- break;
-
- case JCS_YCCK:
- printf ("YCbCrK");
- break;
-
- default:
- printf ("UNKNOWN (value: %d)", (int) cinfo.jpeg_color_space);
- break;
- }
- printf (" 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)
- {
- fprintf (stderr, "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)
- {
- fprintf (stderr, "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
- {
- fprintf (stderr, "gd-jpeg: error: unexpected colorspace\n");
- goto error;
- }
-#if BITS_IN_JSAMPLE == 12
- fprintf (stderr, "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)
- {
- fprintf (stderr, "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)
- {
- fprintf (stderr, "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)
- {
- fprintf (stderr, "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)
- fprintf (stderr, "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)
-{
-
-#if 0
-/* never used */
- my_src_ptr src = (my_src_ptr) cinfo->src;
-
-#endif
-}
-
-
-/*
- * 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;
- size_t 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 */