* @return 1 on success, 0 on error
*/
-//GLOBAL(bool)
bool gdcmFile::gdcm_read_JPEG_file (FILE *fp,void * image_buffer) {
char *pimage;
/* This struct contains the JPEG decompression parameters and pointers to
- * working space (which is allocated as needed by the JPEG library).
- */
+ * working space (which is allocated as needed by the JPEG library).
+ */
struct jpeg_decompress_struct cinfo;
/* -------------- inside, we found :
- JDIMENSION image_width; // input image width
- JDIMENSION image_height; // input image height
- int input_components; // nb of color components in input image
- J_COLOR_SPACE in_color_space; // colorspace of input image
- double input_gamma; // image gamma of input image
- -------------- */
+ * JDIMENSION image_width; // input image width
+ * JDIMENSION image_height; // input image height
+ * int input_components; // nb of color components in input image
+ * J_COLOR_SPACE in_color_space; // colorspace of input image
+ * double input_gamma; // image gamma of input image
+ * -------------- */
/* 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.
- */
+ * 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 */
// typedef JSAMPLE FAR *JSAMPROW; /* ptr to one image row of pixel samples. */
// typedef JSAMPROW *JSAMPARRAY; /* ptr to some rows (a 2-D sample array) */
// typedef JSAMPARRAY *JSAMPIMAGE; /* a 3-D sample array: top index is color */
+
int row_stride; /* physical row width in output buffer */
- if (DEBUG) printf("entree dans gdcmFile::gdcm_read_JPEG_file, depuis gdcmJpeg\n");
-
+ if (DEBUG) printf("entree dans gdcmFile::gdcm_read_JPEG_file12, depuis gdcmJpeg\n");
- /* 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.
- */
-
- /* Step 1: allocate and initialize JPEG decompression object */
-
+ /* 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.
+ */
+
+ /* Step 1: allocate and initialize JPEG decompression object */
if (DEBUG)printf("Entree Step 1\n");
-
+
/* 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. */
-
+ /* 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.
}
-/*
- JDIMENSION image_width; // input image width
- JDIMENSION image_height; // input image height
- int output_components; // # of color components returned
- J_COLOR_SPACE in_color_space; // colorspace of input image
- double input_gamma; // image gamma of input image
- int data_precision; // bits of precision in image data
-
-*/
+ /*
+ * JDIMENSION image_width; // input image width
+ * JDIMENSION image_height; // input image height
+ * int output_components; // # of color components returned
+ * J_COLOR_SPACE in_color_space; // colorspace of input image
+ * double input_gamma; // image gamma of input image
+ * int data_precision; // bits of precision in image data
+ */
/* Step 4: set parameters for decompression */
if (DEBUG) printf("Entree Step 4\n");
/* Step 5: Start decompressor */
if (DEBUG) printf("Entree Step 5\n");
- (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;
+ (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;
if (DEBUG) printf ("cinfo.output_width %d cinfo.output_components %d row_stride %d\n",
- cinfo.output_width, cinfo.output_components,row_stride);
+ cinfo.output_width, cinfo.output_components,row_stride);
/* Make a one-row-high sample array that will go away when done with image */
buffer = (*cinfo.mem->alloc_sarray)
pimage=(char *)image_buffer;
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.
- */
+ /* 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.
+ */
// l'image est deja allouée (et passée en param)
// on ecrit directement les pixels
/* Step 7: Finish decompression */
if (DEBUG) printf("Entree Step 7\n");
-
(void) jpeg_finish_decompress(&cinfo);
+
/* We can ignore the return value since suspension is not possible
* with the stdio data source.
*/
/* And we're done! */
- return 1;
+ return(true);
}
/*
git://git.creatis.insa-lyon.fr / gdcm.git / blobdiff