} opj_cparameters_t;
#define OPJ_DPARAMETERS_IGNORE_PCLR_CMAP_CDEF_FLAG 0x0001
+#define OPJ_DPARAMETERS_DUMP_FLAG 0x0002
/**
* Decompression parameters
OPJ_UINT32 csty;
/** number of resolutions */
OPJ_UINT32 numresolutions;
- /** code-blocks width */
+ /** log2 of code-blocks width */
OPJ_UINT32 cblkw;
- /** code-blocks height */
+ /** log2 of code-blocks height */
OPJ_UINT32 cblkh;
/** code-block coding style */
OPJ_UINT32 cblksty;
- /** discrete wavelet transform identifier */
+ /** discrete wavelet transform identifier: 0 = 9-7 irreversible, 1 = 5-3 reversible */
OPJ_UINT32 qmfbid;
/** quantisation style */
OPJ_UINT32 qntsty;
/**
* Sets the given area to be decoded. This function should be called right after opj_read_header and before any tile header reading.
*
+ * The coordinates passed to this function should be expressed in the reference grid,
+ * that is to say at the highest resolution level, even if requesting the image at lower
+ * resolution levels.
+ *
+ * Generally opj_set_decode_area() should be followed by opj_decode(), and the
+ * codec cannot be re-used.
+ * In the particular case of an image made of a single tile, several sequences of
+ * calls to opoj_set_decode_area() and opj_decode() are allowed, and will bring
+ * performance improvements when reading an image by chunks.
+ *
* @param p_codec the jpeg2000 codec.
* @param p_image the decoded image previously setted by opj_read_header
* @param p_start_x the left position of the rectangle to decode (in image coordinates).