/*
 * File:	ximajas.cpp
 * Purpose:	Platform Independent JasPer Image Class Loader and Writer
 * 12/Apr/2003 Davide Pizzolato - www.xdp.it
 * CxImage version 7.0.1 07/Jan/2011
 */

#include "ximajas.h"

#if CXIMAGE_SUPPORT_JASPER

////////////////////////////////////////////////////////////////////////////////
#if CXIMAGE_SUPPORT_DECODE
////////////////////////////////////////////////////////////////////////////////
bool CxImageJAS::Decode(CxFile *hFile, uint32_t imagetype)
{
	if (hFile == NULL) return false;

	jas_image_t *image=0;
	jas_stream_t *in=0;
	jas_matrix_t **bufs=0;
	int32_t i,error=0;
	int32_t fmt;
	//jas_setdbglevel(0);

  cx_try
  {
	if (jas_init())
		cx_throw("cannot initialize jasper");

	in = jas_stream_fdopen(0, "rb");
	if (!in)
		cx_throw("error: cannot open standard input");

	CxFileJas src(hFile,in);

	fmt = jas_image_getfmt(in);
	if (fmt<0)
		cx_throw("error: unknowm format");

	image = jas_image_decode(in, fmt, 0);
	if (!image){
		fmt = -1;
		cx_throw("error: cannot load image data");
	}

	char szfmt[4];
	*szfmt = '\0';
	strncpy(szfmt,jas_image_fmttostr(fmt),3);
	szfmt[3] = '\0';

	fmt = -1;
#if CXIMAGE_SUPPORT_JP2
	if (strcmp(szfmt,"jp2")==0) fmt = CXIMAGE_FORMAT_JP2;
#endif
#if CXIMAGE_SUPPORT_JPC
	if (strcmp(szfmt,"jpc")==0) fmt = CXIMAGE_FORMAT_JPC;
#endif
#if CXIMAGE_SUPPORT_RAS
	if (strcmp(szfmt,"ras")==0) fmt = CXIMAGE_FORMAT_RAS;
#endif
#if CXIMAGE_SUPPORT_PNM
	if (strcmp(szfmt,"pnm")==0) fmt = CXIMAGE_FORMAT_PNM;
#endif
#if CXIMAGE_SUPPORT_PGX
	if (strcmp(szfmt,"pgx")==0) fmt = CXIMAGE_FORMAT_PGX;
#endif

	//if (fmt<0)
	//	cx_throw("error: unknowm format");

	int32_t x,y,w,h,depth,cmptno;

	w = jas_image_cmptwidth(image,0);
	h = jas_image_cmptheight(image,0);
	depth = jas_image_cmptprec(image,0);

	if (info.nEscape == -1){
		head.biWidth = w;
		head.biHeight= h;
		info.dwType = fmt<0 ? 0 : fmt;
		cx_throw("output dimensions returned");
	}

	if (image->numcmpts_ > 64 || image->numcmpts_ < 0)
		cx_throw("error: too many components");

	// <LD> 01/Jan/2005: Always force conversion to sRGB. Seems to be required for many types of JPEG2000 file.
	// if (depth!=1 && depth!=4 && depth!=8)
	if (image->numcmpts_>=3 && depth <=8)
	{
		jas_image_t *newimage;
		jas_cmprof_t *outprof;
		//jas_eprintf("forcing conversion to sRGB\n");
		outprof = jas_cmprof_createfromclrspc(JAS_CLRSPC_SRGB);
		if (!outprof) {
			cx_throw("cannot create sRGB profile");
		}
		newimage = jas_image_chclrspc(image, outprof, JAS_CMXFORM_INTENT_PER);
		if (!newimage) {
			jas_cmprof_destroy(outprof); // <LD> 01/Jan/2005: Destroy color profile on error.
			cx_throw("cannot convert to sRGB");
		}
		jas_image_destroy(image);
		jas_cmprof_destroy(outprof);
		image = newimage;
	}

	bufs = (jas_matrix_t **)calloc(image->numcmpts_, sizeof(jas_matrix_t**));
	for (i = 0; i < image->numcmpts_; ++i) {
		bufs[i] = jas_matrix_create(1, w);
		if (!bufs[i]) {
			cx_throw("error: cannot allocate memory");
		}
	}

	int32_t nshift = (depth>8) ? (depth-8) : 0;

	if (image->numcmpts_==3 &&
		image->cmpts_[0]->width_ == image->cmpts_[1]->width_ &&
		image->cmpts_[1]->width_ == image->cmpts_[2]->width_ &&
		image->cmpts_[0]->height_ == image->cmpts_[1]->height_ &&
		image->cmpts_[1]->height_ == image->cmpts_[2]->height_ &&
		image->cmpts_[0]->prec_  == image->cmpts_[1]->prec_ &&
		image->cmpts_[1]->prec_ == image->cmpts_[2]->prec_ )
	{

		if(!Create(w,h,24,fmt))
			cx_throw("");

		RGBQUAD c;
        for (y=0; y<h; y++) {
			for (cmptno = 0; cmptno < image->numcmpts_; ++cmptno) {
				jas_image_readcmpt(image, cmptno, 0, y, w, 1, bufs[cmptno]);
			}

			for (x=0; x<w; x++){
				c.rgbRed   = (uint8_t)((jas_matrix_getv(bufs[0], x)>>nshift));
				c.rgbGreen = (uint8_t)((jas_matrix_getv(bufs[1], x)>>nshift));
				c.rgbBlue  = (uint8_t)((jas_matrix_getv(bufs[2], x)>>nshift));
				SetPixelColor(x,h-1-y,c);
			}
		}
	} else {
		info.nNumFrames = image->numcmpts_;
		if ((info.nFrame<0)||(info.nFrame>=info.nNumFrames)){
			cx_throw("wrong frame!");
		}
		for (cmptno=0; cmptno<=info.nFrame; cmptno++) {
			w = jas_image_cmptwidth(image,cmptno);
			h = jas_image_cmptheight(image,cmptno);
			depth = jas_image_cmptprec(image,cmptno);
			if (depth>8) depth=8;
			if(!Create(w,h,depth,imagetype))
				cx_throw("");
			SetGrayPalette();
			for (y=0; y<h; y++) {
				jas_image_readcmpt(image, cmptno, 0, y, w, 1, bufs[0]);
				for (x=0; x<w; x++){
					SetPixelIndex(x,h-1-y,(uint8_t)((jas_matrix_getv(bufs[0], x)>>nshift)));
				}
			}
		}
	}


  } cx_catch {
	if (strcmp(message,"")) strncpy(info.szLastError,message,255);
	if (info.nEscape == -1 && fmt>0){
		error = 0;
	} else {
		error = 1;
	}
  }

	if (bufs) {
		for (i = 0; i < image->numcmpts_; ++i){	if (bufs[i]) jas_matrix_destroy(bufs[i]);}
		free(bufs);
	}
	jas_cleanup();
	if (image) jas_image_destroy(image);
	if (in) jas_stream_close(in);
	return (error==0);
}
////////////////////////////////////////////////////////////////////////////////
#endif //CXIMAGE_SUPPORT_DECODE
////////////////////////////////////////////////////////////////////////////////
#if CXIMAGE_SUPPORT_ENCODE
////////////////////////////////////////////////////////////////////////////////
bool CxImageJAS::Encode(CxFile * hFile, uint32_t imagetype)
{
	if (EncodeSafeCheck(hFile)) return false;

	if (head.biClrUsed!=0 && !IsGrayScale()){
		strcpy(info.szLastError,"JasPer can save only RGB or GrayScale images");
		return false;
	}

	jas_image_t *image=0;
	jas_stream_t *out=0;
	jas_matrix_t *cmpts[3];
	int32_t x,y,yflip,error=0;
	uint_fast16_t cmptno, numcmpts=0;
	jas_image_cmptparm_t cmptparms[3], *cmptparm;

  cx_try {

	if (jas_init())
		cx_throw("cannot initialize jasper");

	out = jas_stream_fdopen(0, "wb");
	if (!out)
		cx_throw("error: cannot open standard output");

	CxFileJas src(hFile,out);

	numcmpts = head.biClrUsed==0 ? 3 : 1;

	for (cmptno = 0, cmptparm = cmptparms; cmptno < numcmpts; ++cmptno, ++cmptparm) {
		cmptparm->tlx = 0;
		cmptparm->tly = 0;
		cmptparm->hstep = 1;
		cmptparm->vstep = 1;
		cmptparm->width = head.biWidth;
		cmptparm->height = head.biHeight;
		cmptparm->prec = 8;
		cmptparm->sgnd = false;
	}

	/* Create image object. */
	image = jas_image_create(numcmpts, cmptparms, JAS_CLRSPC_UNKNOWN);
	if (!image)
		cx_throw("error : jas_image_create");

	if (numcmpts == 3) {
		jas_image_setclrspc(image, JAS_CLRSPC_SRGB);
		jas_image_setcmpttype(image, 0,
		  JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_R));
		jas_image_setcmpttype(image, 1,
		  JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_G));
		jas_image_setcmpttype(image, 2,
		  JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_B));
	} else {
		jas_image_setclrspc(image, JAS_CLRSPC_SGRAY);
		jas_image_setcmpttype(image, 0,
		  JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_GRAY_Y));
	}


	for (x = 0; x < numcmpts; ++x) { cmpts[x] = 0; }
	/* Create temporary matrices to hold component data. */
	for (x = 0; x < numcmpts; ++x) {
		cmpts[x] = jas_matrix_create(1, head.biWidth);
		if (!cmpts[x]) {
			cx_throw("error : can't allocate memory");
		}
	}

	RGBQUAD c;
	for (y = 0; y < head.biHeight; ++y) {
		for (x = 0; x < head.biWidth; ++x) {
			if (head.biClrUsed==0){
				c = GetPixelColor(x,y);
				jas_matrix_setv(cmpts[0], x, c.rgbRed);
				jas_matrix_setv(cmpts[1], x, c.rgbGreen);
				jas_matrix_setv(cmpts[2], x, c.rgbBlue);
			} else {
				jas_matrix_setv(cmpts[0], x, GetPixelIndex(x,y));
			}
		}
		yflip = head.biHeight - 1 - y;
		for (cmptno = 0; cmptno < numcmpts; ++cmptno) {
			if (jas_image_writecmpt(image, cmptno, 0, yflip, head.biWidth, 1, cmpts[cmptno])) {
				cx_throw("error : jas_image_writecmpt");
			}
		}
	}

	 char szfmt[4];
	*szfmt = '\0';
#if CXIMAGE_SUPPORT_JP2
	if (imagetype == CXIMAGE_FORMAT_JP2) strcpy(szfmt,"jp2");
#endif
#if CXIMAGE_SUPPORT_JPC
	if (imagetype == CXIMAGE_FORMAT_JPC) strcpy(szfmt,"jpc");
#endif
#if CXIMAGE_SUPPORT_RAS
	if (imagetype == CXIMAGE_FORMAT_RAS) strcpy(szfmt,"ras");
#endif
#if CXIMAGE_SUPPORT_PNM
	if (imagetype == CXIMAGE_FORMAT_PNM) strcpy(szfmt,"pnm");
#endif
#if CXIMAGE_SUPPORT_PGX
	if (imagetype == CXIMAGE_FORMAT_PGX){
		strcpy(szfmt,"pgx");
		if (head.biClrUsed==0) cx_throw("PGX can save only GrayScale images");
	}
#endif
	int32_t outfmt = jas_image_strtofmt(szfmt);

	char szoutopts[32];
	sprintf(szoutopts,"rate=%.3f", info.fQuality/100.0f);

	if (jas_image_encode(image, out, outfmt, szoutopts)) {
		cx_throw("error: cannot encode image");
	}
	jas_stream_flush(out);

  } cx_catch {
	if (strcmp(message,"")) strncpy(info.szLastError,message,255);
	error = 1;
  }

	for (x = 0; x < numcmpts; ++x) { if (cmpts[x]) { jas_matrix_destroy(cmpts[x]); } }
	jas_cleanup();
	if (image) jas_image_destroy(image);
	if (out) jas_stream_close(out);

	return (error==0);
}
////////////////////////////////////////////////////////////////////////////////
#endif // CXIMAGE_SUPPORT_ENCODE
////////////////////////////////////////////////////////////////////////////////
#endif // CXIMAGE_SUPPORT_JASPER

