AdvaImg plugin folder renaming

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diff --git a/plugins/AdvaImg/src/LibJPEG/example.c b/plugins/AdvaImg/src/LibJPEG/example.c
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+/*

+ * example.c

+ *

+ * This file illustrates how to use the IJG code as a subroutine library

+ * to read or write JPEG image files.  You should look at this code in

+ * conjunction with the documentation file libjpeg.txt.

+ *

+ * This code will not do anything useful as-is, but it may be helpful as a

+ * skeleton for constructing routines that call the JPEG library.  

+ *

+ * We present these routines in the same coding style used in the JPEG code

+ * (ANSI function definitions, etc); but you are of course free to code your

+ * routines in a different style if you prefer.

+ */

+

+#include <stdio.h>

+

+/*

+ * Include file for users of JPEG library.

+ * You will need to have included system headers that define at least

+ * the typedefs FILE and size_t before you can include jpeglib.h.

+ * (stdio.h is sufficient on ANSI-conforming systems.)

+ * You may also wish to include "jerror.h".

+ */

+

+#include "jpeglib.h"

+

+/*

+ * <setjmp.h> is used for the optional error recovery mechanism shown in

+ * the second part of the example.

+ */

+

+#include <setjmp.h>

+

+

+

+/******************** JPEG COMPRESSION SAMPLE INTERFACE *******************/

+

+/* This half of the example shows how to feed data into the JPEG compressor.

+ * We present a minimal version that does not worry about refinements such

+ * as error recovery (the JPEG code will just exit() if it gets an error).

+ */

+

+

+/*

+ * IMAGE DATA FORMATS:

+ *

+ * The standard input image format is a rectangular array of pixels, with

+ * each pixel having the same number of "component" values (color channels).

+ * Each pixel row is an array of JSAMPLEs (which typically are unsigned chars).

+ * If you are working with color data, then the color values for each pixel

+ * must be adjacent in the row; for example, R,G,B,R,G,B,R,G,B,... for 24-bit

+ * RGB color.

+ *

+ * For this example, we'll assume that this data structure matches the way

+ * our application has stored the image in memory, so we can just pass a

+ * pointer to our image buffer.  In particular, let's say that the image is

+ * RGB color and is described by:

+ */

+

+extern JSAMPLE * image_buffer;	/* Points to large array of R,G,B-order data */

+extern int image_height;	/* Number of rows in image */

+extern int image_width;		/* Number of columns in image */

+

+

+/*

+ * Sample routine for JPEG compression.  We assume that the target file name

+ * and a compression quality factor are passed in.

+ */

+

+GLOBAL(void)

+write_JPEG_file (char * filename, int quality)

+{

+  /* This struct contains the JPEG compression parameters and pointers to

+   * working space (which is allocated as needed by the JPEG library).

+   * It is possible to have several such structures, representing multiple

+   * compression/decompression processes, in existence at once.  We refer

+   * to any one struct (and its associated working data) as a "JPEG object".

+   */

+  struct jpeg_compress_struct cinfo;

+  /* This struct represents a JPEG error handler.  It is declared separately

+   * because applications often want to supply a specialized error handler

+   * (see the second half of this file for an example).  But here we just

+   * take the easy way out and use the standard error handler, which will

+   * print a message on stderr and call exit() if compression fails.

+   * Note that this struct must live as long as the main JPEG parameter

+   * struct, to avoid dangling-pointer problems.

+   */

+  struct jpeg_error_mgr jerr;

+  /* More stuff */

+  FILE * outfile;		/* target file */

+  JSAMPROW row_pointer[1];	/* pointer to JSAMPLE row[s] */

+  int row_stride;		/* physical row width in image buffer */

+

+  /* Step 1: allocate and initialize JPEG compression object */

+

+  /* We have to set up the error handler first, in case the initialization

+   * step fails.  (Unlikely, but it could happen if you are out of memory.)

+   * This routine fills in the contents of struct jerr, and returns jerr's

+   * address which we place into the link field in cinfo.

+   */

+  cinfo.err = jpeg_std_error(&jerr);

+  /* Now we can initialize the JPEG compression object. */

+  jpeg_create_compress(&cinfo);

+

+  /* Step 2: specify data destination (eg, a file) */

+  /* Note: steps 2 and 3 can be done in either order. */

+

+  /* Here we use the library-supplied code to send compressed data to a

+   * stdio stream.  You can also write your own code to do something else.

+   * VERY IMPORTANT: use "b" option to fopen() if you are on a machine that

+   * requires it in order to write binary files.

+   */

+  if ((outfile = fopen(filename, "wb")) == NULL) {

+    fprintf(stderr, "can't open %s\n", filename);

+    exit(1);

+  }

+  jpeg_stdio_dest(&cinfo, outfile);

+

+  /* Step 3: set parameters for compression */

+

+  /* First we supply a description of the input image.

+   * Four fields of the cinfo struct must be filled in:

+   */

+  cinfo.image_width = image_width; 	/* image width and height, in pixels */

+  cinfo.image_height = image_height;

+  cinfo.input_components = 3;		/* # of color components per pixel */

+  cinfo.in_color_space = JCS_RGB; 	/* colorspace of input image */

+  /* Now use the library's routine to set default compression parameters.

+   * (You must set at least cinfo.in_color_space before calling this,

+   * since the defaults depend on the source color space.)

+   */

+  jpeg_set_defaults(&cinfo);

+  /* Now you can set any non-default parameters you wish to.

+   * Here we just illustrate the use of quality (quantization table) scaling:

+   */

+  jpeg_set_quality(&cinfo, quality, TRUE /* limit to baseline-JPEG values */);

+

+  /* Step 4: Start compressor */

+

+  /* TRUE ensures that we will write a complete interchange-JPEG file.

+   * Pass TRUE unless you are very sure of what you're doing.

+   */

+  jpeg_start_compress(&cinfo, TRUE);

+

+  /* Step 5: while (scan lines remain to be written) */

+  /*           jpeg_write_scanlines(...); */

+

+  /* Here we use the library's state variable cinfo.next_scanline as the

+   * loop counter, so that we don't have to keep track ourselves.

+   * To keep things simple, we pass one scanline per call; you can pass

+   * more if you wish, though.

+   */

+  row_stride = image_width * 3;	/* JSAMPLEs per row in image_buffer */

+

+  while (cinfo.next_scanline < cinfo.image_height) {

+    /* jpeg_write_scanlines expects an array of pointers to scanlines.

+     * Here the array is only one element long, but you could pass

+     * more than one scanline at a time if that's more convenient.

+     */

+    row_pointer[0] = & image_buffer[cinfo.next_scanline * row_stride];

+    (void) jpeg_write_scanlines(&cinfo, row_pointer, 1);

+  }

+

+  /* Step 6: Finish compression */

+

+  jpeg_finish_compress(&cinfo);

+  /* After finish_compress, we can close the output file. */

+  fclose(outfile);

+

+  /* Step 7: release JPEG compression object */

+

+  /* This is an important step since it will release a good deal of memory. */

+  jpeg_destroy_compress(&cinfo);

+

+  /* And we're done! */

+}

+

+

+/*

+ * SOME FINE POINTS:

+ *

+ * In the above loop, we ignored the return value of jpeg_write_scanlines,

+ * which is the number of scanlines actually written.  We could get away

+ * with this because we were only relying on the value of cinfo.next_scanline,

+ * which will be incremented correctly.  If you maintain additional loop

+ * variables then you should be careful to increment them properly.

+ * Actually, for output to a stdio stream you needn't worry, because

+ * then jpeg_write_scanlines will write all the lines passed (or else exit

+ * with a fatal error).  Partial writes can only occur if you use a data

+ * destination module that can demand suspension of the compressor.

+ * (If you don't know what that's for, you don't need it.)

+ *

+ * If the compressor requires full-image buffers (for entropy-coding

+ * optimization or a multi-scan JPEG file), it will create temporary

+ * files for anything that doesn't fit within the maximum-memory setting.

+ * (Note that temp files are NOT needed if you use the default parameters.)

+ * On some systems you may need to set up a signal handler to ensure that

+ * temporary files are deleted if the program is interrupted.  See libjpeg.txt.

+ *

+ * Scanlines MUST be supplied in top-to-bottom order if you want your JPEG

+ * files to be compatible with everyone else's.  If you cannot readily read

+ * your data in that order, you'll need an intermediate array to hold the

+ * image.  See rdtarga.c or rdbmp.c for examples of handling bottom-to-top

+ * source data using the JPEG code's internal virtual-array mechanisms.

+ */

+

+

+

+/******************** JPEG DECOMPRESSION SAMPLE INTERFACE *******************/

+

+/* This half of the example shows how to read data from the JPEG decompressor.

+ * It's a bit more refined than the above, in that we show:

+ *   (a) how to modify the JPEG library's standard error-reporting behavior;

+ *   (b) how to allocate workspace using the library's memory manager.

+ *

+ * Just to make this example a little different from the first one, we'll

+ * assume that we do not intend to put the whole image into an in-memory

+ * buffer, but to send it line-by-line someplace else.  We need a one-

+ * scanline-high JSAMPLE array as a work buffer, and we will let the JPEG

+ * memory manager allocate it for us.  This approach is actually quite useful

+ * because we don't need to remember to deallocate the buffer separately: it

+ * will go away automatically when the JPEG object is cleaned up.

+ */

+

+

+/*

+ * ERROR HANDLING:

+ *

+ * The JPEG library's standard error handler (jerror.c) is divided into

+ * several "methods" which you can override individually.  This lets you

+ * adjust the behavior without duplicating a lot of code, which you might

+ * have to update with each future release.

+ *

+ * Our example here shows how to override the "error_exit" method so that

+ * control is returned to the library's caller when a fatal error occurs,

+ * rather than calling exit() as the standard error_exit method does.

+ *

+ * We use C's setjmp/longjmp facility to return control.  This means that the

+ * routine which calls the JPEG library must first execute a setjmp() call to

+ * establish the return point.  We want the replacement error_exit to do a

+ * longjmp().  But we need to make the setjmp buffer accessible to the

+ * error_exit routine.  To do this, we make a private extension of the

+ * standard JPEG error handler object.  (If we were using C++, we'd say we

+ * were making a subclass of the regular error handler.)

+ *

+ * Here's the extended error handler struct:

+ */

+

+struct my_error_mgr {

+  struct jpeg_error_mgr pub;	/* "public" fields */

+

+  jmp_buf setjmp_buffer;	/* for return to caller */

+};

+

+typedef struct my_error_mgr * my_error_ptr;

+

+/*

+ * Here's the routine that will replace the standard error_exit method:

+ */

+

+METHODDEF(void)

+my_error_exit (j_common_ptr cinfo)

+{

+  /* cinfo->err really points to a my_error_mgr struct, so coerce pointer */

+  my_error_ptr myerr = (my_error_ptr) cinfo->err;

+

+  /* Always display the message. */

+  /* We could postpone this until after returning, if we chose. */

+  (*cinfo->err->output_message) (cinfo);

+

+  /* Return control to the setjmp point */

+  longjmp(myerr->setjmp_buffer, 1);

+}

+

+

+/*

+ * Sample routine for JPEG decompression.  We assume that the source file name

+ * is passed in.  We want to return 1 on success, 0 on error.

+ */

+

+

+GLOBAL(int)

+read_JPEG_file (char * filename)

+{

+  /* This struct contains the JPEG decompression parameters and pointers to

+   * working space (which is allocated as needed by the JPEG library).

+   */

+  struct jpeg_decompress_struct cinfo;

+  /* We use our private extension JPEG error handler.

+   * Note that this struct must live as long as the main JPEG parameter

+   * struct, to avoid dangling-pointer problems.

+   */

+  struct my_error_mgr jerr;

+  /* More stuff */

+  FILE * infile;		/* source file */

+  JSAMPARRAY buffer;		/* Output row buffer */

+  int row_stride;		/* physical row width in output buffer */

+

+  /* In this example we want to open the input file before doing anything else,

+   * so that the setjmp() error recovery below can assume the file is open.

+   * VERY IMPORTANT: use "b" option to fopen() if you are on a machine that

+   * requires it in order to read binary files.

+   */

+

+  if ((infile = fopen(filename, "rb")) == NULL) {

+    fprintf(stderr, "can't open %s\n", filename);

+    return 0;

+  }

+

+  /* Step 1: allocate and initialize JPEG decompression object */

+

+  /* We set up the normal JPEG error routines, then override error_exit. */

+  cinfo.err = jpeg_std_error(&jerr.pub);

+  jerr.pub.error_exit = my_error_exit;

+  /* Establish the setjmp return context for my_error_exit to use. */

+  if (setjmp(jerr.setjmp_buffer)) {

+    /* If we get here, the JPEG code has signaled an error.

+     * We need to clean up the JPEG object, close the input file, and return.

+     */

+    jpeg_destroy_decompress(&cinfo);

+    fclose(infile);

+    return 0;

+  }

+  /* Now we can initialize the JPEG decompression object. */

+  jpeg_create_decompress(&cinfo);

+

+  /* Step 2: specify data source (eg, a file) */

+

+  jpeg_stdio_src(&cinfo, infile);

+

+  /* Step 3: read file parameters with jpeg_read_header() */

+

+  (void) jpeg_read_header(&cinfo, TRUE);

+  /* We can ignore the return value from jpeg_read_header since

+   *   (a) suspension is not possible with the stdio data source, and

+   *   (b) we passed TRUE to reject a tables-only JPEG file as an error.

+   * See libjpeg.txt for more info.

+   */

+

+  /* Step 4: set parameters for decompression */

+

+  /* In this example, we don't need to change any of the defaults set by

+   * jpeg_read_header(), so we do nothing here.

+   */

+

+  /* Step 5: Start decompressor */

+

+  (void) jpeg_start_decompress(&cinfo);

+  /* We can ignore the return value since suspension is not possible

+   * with the stdio data source.

+   */

+

+  /* We may need to do some setup of our own at this point before reading

+   * the data.  After jpeg_start_decompress() we have the correct scaled

+   * output image dimensions available, as well as the output colormap

+   * if we asked for color quantization.

+   * In this example, we need to make an output work buffer of the right size.

+   */ 

+  /* JSAMPLEs per row in output buffer */

+  row_stride = cinfo.output_width * cinfo.output_components;

+  /* Make a one-row-high sample array that will go away when done with image */

+  buffer = (*cinfo.mem->alloc_sarray)

+		((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1);

+

+  /* Step 6: while (scan lines remain to be read) */

+  /*           jpeg_read_scanlines(...); */

+

+  /* Here we use the library's state variable cinfo.output_scanline as the

+   * loop counter, so that we don't have to keep track ourselves.

+   */

+  while (cinfo.output_scanline < cinfo.output_height) {

+    /* jpeg_read_scanlines expects an array of pointers to scanlines.

+     * Here the array is only one element long, but you could ask for

+     * more than one scanline at a time if that's more convenient.

+     */

+    (void) jpeg_read_scanlines(&cinfo, buffer, 1);

+    /* Assume put_scanline_someplace wants a pointer and sample count. */

+    put_scanline_someplace(buffer[0], row_stride);

+  }

+

+  /* Step 7: Finish decompression */

+

+  (void) jpeg_finish_decompress(&cinfo);

+  /* We can ignore the return value since suspension is not possible

+   * with the stdio data source.

+   */

+

+  /* Step 8: Release JPEG decompression object */

+

+  /* This is an important step since it will release a good deal of memory. */

+  jpeg_destroy_decompress(&cinfo);

+

+  /* After finish_decompress, we can close the input file.

+   * Here we postpone it until after no more JPEG errors are possible,

+   * so as to simplify the setjmp error logic above.  (Actually, I don't

+   * think that jpeg_destroy can do an error exit, but why assume anything...)

+   */

+  fclose(infile);

+

+  /* At this point you may want to check to see whether any corrupt-data

+   * warnings occurred (test whether jerr.pub.num_warnings is nonzero).

+   */

+

+  /* And we're done! */

+  return 1;

+}

+

+

+/*

+ * SOME FINE POINTS:

+ *

+ * In the above code, we ignored the return value of jpeg_read_scanlines,

+ * which is the number of scanlines actually read.  We could get away with

+ * this because we asked for only one line at a time and we weren't using

+ * a suspending data source.  See libjpeg.txt for more info.

+ *

+ * We cheated a bit by calling alloc_sarray() after jpeg_start_decompress();

+ * we should have done it beforehand to ensure that the space would be

+ * counted against the JPEG max_memory setting.  In some systems the above

+ * code would risk an out-of-memory error.  However, in general we don't

+ * know the output image dimensions before jpeg_start_decompress(), unless we

+ * call jpeg_calc_output_dimensions().  See libjpeg.txt for more about this.

+ *

+ * Scanlines are returned in the same order as they appear in the JPEG file,

+ * which is standardly top-to-bottom.  If you must emit data bottom-to-top,

+ * you can use one of the virtual arrays provided by the JPEG memory manager

+ * to invert the data.  See wrbmp.c for an example.

+ *

+ * As with compression, some operating modes may require temporary files.

+ * On some systems you may need to set up a signal handler to ensure that

+ * temporary files are deleted if the program is interrupted.  See libjpeg.txt.

+ */