X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=utilities%2FCxImage%2Fximajpg.cpp;h=1cf5a00dba489fd626430e2309a094e00ba92857;hb=0141f3887fe8e6e429621b603b6359be679e9fb5;hp=30146aa731d1b0fa6b5b3b75e7316e74d669ed3b;hpb=19d5db17f1c0e98cf84a6cb83643404a550a12a4;p=clitk.git diff --git a/utilities/CxImage/ximajpg.cpp b/utilities/CxImage/ximajpg.cpp index 30146aa..1cf5a00 100644 --- a/utilities/CxImage/ximajpg.cpp +++ b/utilities/CxImage/ximajpg.cpp @@ -1,496 +1,496 @@ -/* - * File: ximajpg.cpp - * Purpose: Platform Independent JPEG Image Class Loader and Writer - * 07/Aug/2001 Davide Pizzolato - www.xdp.it - * CxImage version 6.0.0 02/Feb/2008 - */ - -#include "ximajpg.h" - -#if CXIMAGE_SUPPORT_JPG - -#include "../jpeg/jmorecfg.h" - -#include "ximaiter.h" - -#include - -struct jpg_error_mgr { - struct jpeg_error_mgr pub; /* "public" fields */ - jmp_buf setjmp_buffer; /* for return to caller */ - char* buffer; /* error message */ -}; -typedef jpg_error_mgr *jpg_error_ptr; - -//////////////////////////////////////////////////////////////////////////////// -// Here's the routine that will replace the standard error_exit method: -//////////////////////////////////////////////////////////////////////////////// -static void -ima_jpeg_error_exit (j_common_ptr cinfo) -{ - /* cinfo->err really points to a my_error_mgr struct, so coerce pointer */ - jpg_error_ptr myerr = (jpg_error_ptr) cinfo->err; - /* Create the message */ - myerr->pub.format_message (cinfo, myerr->buffer); - /* Send it to stderr, adding a newline */ - /* Return control to the setjmp point */ - longjmp(myerr->setjmp_buffer, 1); -} -//////////////////////////////////////////////////////////////////////////////// -CxImageJPG::CxImageJPG(): CxImage(CXIMAGE_FORMAT_JPG) -{ -#if CXIMAGEJPG_SUPPORT_EXIF - m_exif = NULL; - memset(&m_exifinfo, 0, sizeof(EXIFINFO)); -#endif -} -//////////////////////////////////////////////////////////////////////////////// -CxImageJPG::~CxImageJPG() -{ -#if CXIMAGEJPG_SUPPORT_EXIF - if (m_exif) delete m_exif; -#endif -} -//////////////////////////////////////////////////////////////////////////////// -#if CXIMAGEJPG_SUPPORT_EXIF -bool CxImageJPG::DecodeExif(CxFile * hFile) -{ - m_exif = new CxExifInfo(&m_exifinfo); - if (m_exif){ - long pos=hFile->Tell(); - m_exif->DecodeExif(hFile); - hFile->Seek(pos,SEEK_SET); - return m_exif->m_exifinfo->IsExif; - } else { - return false; - } -} -#endif //CXIMAGEJPG_SUPPORT_EXIF -//////////////////////////////////////////////////////////////////////////////// -#if CXIMAGE_SUPPORT_DECODE -//////////////////////////////////////////////////////////////////////////////// -bool CxImageJPG::Decode(CxFile * hFile) -{ - - bool is_exif = false; -#if CXIMAGEJPG_SUPPORT_EXIF - is_exif = DecodeExif(hFile); -#endif - - CImageIterator iter(this); - /* 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. */ - struct jpg_error_mgr jerr; - jerr.buffer=info.szLastError; - /* More stuff */ - 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. - */ - - /* 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 = ima_jpeg_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); - 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); - CxFileJpg src(hFile); - cinfo.src = &src; - - /* Step 3: read file parameters with jpeg_read_header() */ - (void) jpeg_read_header(&cinfo, TRUE); - - /* Step 4 handle decoder options*/ - if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & DECODE_GRAYSCALE) != 0) - cinfo.out_color_space = JCS_GRAYSCALE; - if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & DECODE_QUANTIZE) != 0) { - cinfo.quantize_colors = TRUE; - cinfo.desired_number_of_colors = GetJpegQuality(); - } - if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & DECODE_DITHER) != 0) - cinfo.dither_mode = m_nDither; - if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & DECODE_ONEPASS) != 0) - cinfo.two_pass_quantize = FALSE; - if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & DECODE_NOSMOOTH) != 0) - cinfo.do_fancy_upsampling = FALSE; - -//: Load true color images as RGB (no quantize) -/* Step 4: set parameters for decompression */ -/* if (cinfo.jpeg_color_space!=JCS_GRAYSCALE) { - * cinfo.quantize_colors = TRUE; - * cinfo.desired_number_of_colors = 128; - *} - */ // - - // Set the scale - cinfo.scale_denom = GetJpegScale(); - - // Borrowed the idea from GIF implementation - if (info.nEscape == -1) { - // Return output dimensions only - jpeg_calc_output_dimensions(&cinfo); - head.biWidth = cinfo.output_width; - head.biHeight = cinfo.output_height; - info.dwType = CXIMAGE_FORMAT_JPG; - jpeg_destroy_decompress(&cinfo); - return true; - } - - /* Step 5: Start decompressor */ - jpeg_start_decompress(&cinfo); - - /* 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. - */ - //Create the image using output dimensions - //Create(cinfo.image_width, cinfo.image_height, 8*cinfo.output_components, CXIMAGE_FORMAT_JPG); - Create(cinfo.output_width, cinfo.output_height, 8*cinfo.output_components, CXIMAGE_FORMAT_JPG); - - if (!pDib) longjmp(jerr.setjmp_buffer, 1); // check if the image has been created - - if (is_exif){ -#if CXIMAGEJPG_SUPPORT_EXIF - if ((m_exifinfo.Xresolution != 0.0) && (m_exifinfo.ResolutionUnit != 0)) - SetXDPI((long)(m_exifinfo.Xresolution/m_exifinfo.ResolutionUnit)); - if ((m_exifinfo.Yresolution != 0.0) && (m_exifinfo.ResolutionUnit != 0)) - SetYDPI((long)(m_exifinfo.Yresolution/m_exifinfo.ResolutionUnit)); -#endif - } else { - switch (cinfo.density_unit) { - case 0: // [andy] fix for aspect ratio... - if((cinfo.Y_density > 0) && (cinfo.X_density > 0)){ - SetYDPI((long)(GetXDPI()*(float(cinfo.Y_density)/float(cinfo.X_density)))); - } - break; - case 2: // [andy] fix: cinfo.X/Y_density is pixels per centimeter - SetXDPI((long)floor(cinfo.X_density * 2.54 + 0.5)); - SetYDPI((long)floor(cinfo.Y_density * 2.54 + 0.5)); - break; - default: - SetXDPI(cinfo.X_density); - SetYDPI(cinfo.Y_density); - } - } - - if (cinfo.out_color_space==JCS_GRAYSCALE){ - SetGrayPalette(); - head.biClrUsed =256; - } else { - if (cinfo.quantize_colors){ - SetPalette(cinfo.actual_number_of_colors, cinfo.colormap[0], cinfo.colormap[1], cinfo.colormap[2]); - head.biClrUsed=cinfo.actual_number_of_colors; - } else { - head.biClrUsed=0; - } - } - - /* 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. - */ - iter.Upset(); - while (cinfo.output_scanline < cinfo.output_height) { - - if (info.nEscape) longjmp(jerr.setjmp_buffer, 1); // - cancel decoding - - (void) jpeg_read_scanlines(&cinfo, buffer, 1); - // info.nProgress = (long)(100*cinfo.output_scanline/cinfo.output_height); - // Step 6a: CMYK->RGB */ - if ((cinfo.num_components==4)&&(cinfo.quantize_colors==FALSE)){ - BYTE k,*dst,*src; - dst=iter.GetRow(); - src=buffer[0]; - for(long x3=0,x4=0; x3<(long)info.dwEffWidth && x4 Step 7A: Swap red and blue components - // not necessary if swapped red and blue definition in jmorecfg.h;ln322 - if ((cinfo.num_components==3)&&(cinfo.quantize_colors==FALSE)){ - BYTE* r0=GetBits(); - for(long y=0;y - cancel decoding - RGBtoBGR(r0,3*head.biWidth); - r0+=info.dwEffWidth; - } - } - - /* Step 8: Release JPEG decompression object */ - /* This is an important step since it will release a good deal of memory. */ - jpeg_destroy_decompress(&cinfo); - - /* 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 true; -} -//////////////////////////////////////////////////////////////////////////////// -#endif //CXIMAGE_SUPPORT_DECODE -//////////////////////////////////////////////////////////////////////////////// -#if CXIMAGE_SUPPORT_ENCODE -//////////////////////////////////////////////////////////////////////////////// -bool CxImageJPG::Encode(CxFile * hFile) -{ - if (EncodeSafeCheck(hFile)) return false; - - if (head.biClrUsed!=0 && !IsGrayScale()){ - strcpy(info.szLastError,"JPEG can save only RGB or GreyScale images"); - return false; - } - - // necessary for EXIF, and for roll backs - long pos=hFile->Tell(); - - /* 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; - /* We use our private extension JPEG error handler. */ - struct jpg_error_mgr jerr; - jerr.buffer=info.szLastError; - /* More stuff */ - int row_stride; /* physical row width in image buffer */ - JSAMPARRAY buffer; /* Output row 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); - /* We set up the normal JPEG error routines, then override error_exit. */ - cinfo.err = jpeg_std_error(&jerr.pub); - jerr.pub.error_exit = ima_jpeg_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. - */ - strcpy(info.szLastError, jerr.buffer); // - jpeg_destroy_compress(&cinfo); - return 0; - } - - /* 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. - */ - - //jpeg_stdio_dest(&cinfo, outfile); - CxFileJpg dest(hFile); - cinfo.dest = &dest; - - /* 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 = GetWidth(); // image width and height, in pixels - cinfo.image_height = GetHeight(); - - if (IsGrayScale()){ - cinfo.input_components = 1; // # of color components per pixel - cinfo.in_color_space = JCS_GRAYSCALE; /* colorspace of input image */ - } else { - 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: - */ - -//#ifdef C_ARITH_CODING_SUPPORTED - if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_ARITHMETIC) != 0) - cinfo.arith_code = TRUE; -//#endif - -//#ifdef ENTROPY_OPT_SUPPORTED - if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_OPTIMIZE) != 0) - cinfo.optimize_coding = TRUE; -//#endif - - if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_GRAYSCALE) != 0) - jpeg_set_colorspace(&cinfo, JCS_GRAYSCALE); - - if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_SMOOTHING) != 0) - cinfo.smoothing_factor = m_nSmoothing; - - jpeg_set_quality(&cinfo, GetJpegQuality(), (GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_BASELINE) != 0); - -//#ifdef C_PROGRESSIVE_SUPPORTED - if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_PROGRESSIVE) != 0) - jpeg_simple_progression(&cinfo); -//#endif - -#ifdef C_LOSSLESS_SUPPORTED - if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_LOSSLESS) != 0) - jpeg_simple_lossless(&cinfo, m_nPredictor, m_nPointTransform); -#endif - - //SetCodecOption(ENCODE_SUBSAMPLE_444 | GetCodecOption(CXIMAGE_FORMAT_JPG),CXIMAGE_FORMAT_JPG); - - // 2x2, 1x1, 1x1 (4:1:1) : High (default sub sampling) - cinfo.comp_info[0].h_samp_factor = 2; - cinfo.comp_info[0].v_samp_factor = 2; - cinfo.comp_info[1].h_samp_factor = 1; - cinfo.comp_info[1].v_samp_factor = 1; - cinfo.comp_info[2].h_samp_factor = 1; - cinfo.comp_info[2].v_samp_factor = 1; - - if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_SUBSAMPLE_422) != 0){ - // 2x1, 1x1, 1x1 (4:2:2) : Medium - cinfo.comp_info[0].h_samp_factor = 2; - cinfo.comp_info[0].v_samp_factor = 1; - cinfo.comp_info[1].h_samp_factor = 1; - cinfo.comp_info[1].v_samp_factor = 1; - cinfo.comp_info[2].h_samp_factor = 1; - cinfo.comp_info[2].v_samp_factor = 1; - } - - if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_SUBSAMPLE_444) != 0){ - // 1x1 1x1 1x1 (4:4:4) : None - cinfo.comp_info[0].h_samp_factor = 1; - cinfo.comp_info[0].v_samp_factor = 1; - cinfo.comp_info[1].h_samp_factor = 1; - cinfo.comp_info[1].v_samp_factor = 1; - cinfo.comp_info[2].h_samp_factor = 1; - cinfo.comp_info[2].v_samp_factor = 1; - } - - cinfo.density_unit=1; - cinfo.X_density=(unsigned short)GetXDPI(); - cinfo.Y_density=(unsigned short)GetYDPI(); - - /* 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 = info.dwEffWidth; /* JSAMPLEs per row in image_buffer */ - - // "8+row_stride" fix heap deallocation problem during debug??? - buffer = (*cinfo.mem->alloc_sarray) - ((j_common_ptr) &cinfo, JPOOL_IMAGE, 8+row_stride, 1); - - CImageIterator iter(this); - - iter.Upset(); - while (cinfo.next_scanline < cinfo.image_height) { - // info.nProgress = (long)(100*cinfo.next_scanline/cinfo.image_height); - iter.GetRow(buffer[0], row_stride); - // not necessary if swapped red and blue definition in jmorecfg.h;ln322 - if (head.biClrUsed==0){ // swap R & B for RGB images - RGBtoBGR(buffer[0], row_stride); // Lance : 1998/09/01 : Bug ID: EXP-2.1.1-9 - } - iter.PrevRow(); - (void) jpeg_write_scanlines(&cinfo, buffer, 1); - } - - /* Step 6: Finish compression */ - jpeg_finish_compress(&cinfo); - - /* Step 7: release JPEG compression object */ - /* This is an important step since it will release a good deal of memory. */ - jpeg_destroy_compress(&cinfo); - - -#if CXIMAGEJPG_SUPPORT_EXIF - if (m_exif && m_exif->m_exifinfo->IsExif){ - // discard useless sections (if any) read from original image - m_exif->DiscardAllButExif(); - // read new created image, to split the sections - hFile->Seek(pos,SEEK_SET); - m_exif->DecodeExif(hFile,EXIF_READ_IMAGE); - // save back the image, adding EXIF section - hFile->Seek(pos,SEEK_SET); - m_exif->EncodeExif(hFile); - } -#endif - - - /* And we're done! */ - return true; -} -//////////////////////////////////////////////////////////////////////////////// -#endif // CXIMAGE_SUPPORT_ENCODE -//////////////////////////////////////////////////////////////////////////////// -#endif // CXIMAGE_SUPPORT_JPG - +/* + * File: ximajpg.cpp + * Purpose: Platform Independent JPEG Image Class Loader and Writer + * 07/Aug/2001 Davide Pizzolato - www.xdp.it + * CxImage version 6.0.0 02/Feb/2008 + */ + +#include "ximajpg.h" + +#if CXIMAGE_SUPPORT_JPG + +#include "../jpeg/jmorecfg.h" + +#include "ximaiter.h" + +#include + +struct jpg_error_mgr { + struct jpeg_error_mgr pub; /* "public" fields */ + jmp_buf setjmp_buffer; /* for return to caller */ + char* buffer; /* error message */ +}; +typedef jpg_error_mgr *jpg_error_ptr; + +//////////////////////////////////////////////////////////////////////////////// +// Here's the routine that will replace the standard error_exit method: +//////////////////////////////////////////////////////////////////////////////// +static void +ima_jpeg_error_exit (j_common_ptr cinfo) +{ + /* cinfo->err really points to a my_error_mgr struct, so coerce pointer */ + jpg_error_ptr myerr = (jpg_error_ptr) cinfo->err; + /* Create the message */ + myerr->pub.format_message (cinfo, myerr->buffer); + /* Send it to stderr, adding a newline */ + /* Return control to the setjmp point */ + longjmp(myerr->setjmp_buffer, 1); +} +//////////////////////////////////////////////////////////////////////////////// +CxImageJPG::CxImageJPG(): CxImage(CXIMAGE_FORMAT_JPG) +{ +#if CXIMAGEJPG_SUPPORT_EXIF + m_exif = NULL; + memset(&m_exifinfo, 0, sizeof(EXIFINFO)); +#endif +} +//////////////////////////////////////////////////////////////////////////////// +CxImageJPG::~CxImageJPG() +{ +#if CXIMAGEJPG_SUPPORT_EXIF + if (m_exif) delete m_exif; +#endif +} +//////////////////////////////////////////////////////////////////////////////// +#if CXIMAGEJPG_SUPPORT_EXIF +bool CxImageJPG::DecodeExif(CxFile * hFile) +{ + m_exif = new CxExifInfo(&m_exifinfo); + if (m_exif){ + long pos=hFile->Tell(); + m_exif->DecodeExif(hFile); + hFile->Seek(pos,SEEK_SET); + return m_exif->m_exifinfo->IsExif; + } else { + return false; + } +} +#endif //CXIMAGEJPG_SUPPORT_EXIF +//////////////////////////////////////////////////////////////////////////////// +#if CXIMAGE_SUPPORT_DECODE +//////////////////////////////////////////////////////////////////////////////// +bool CxImageJPG::Decode(CxFile * hFile) +{ + + bool is_exif = false; +#if CXIMAGEJPG_SUPPORT_EXIF + is_exif = DecodeExif(hFile); +#endif + + CImageIterator iter(this); + /* 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. */ + struct jpg_error_mgr jerr; + jerr.buffer=info.szLastError; + /* More stuff */ + 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. + */ + + /* 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 = ima_jpeg_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); + 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); + CxFileJpg src(hFile); + cinfo.src = &src; + + /* Step 3: read file parameters with jpeg_read_header() */ + (void) jpeg_read_header(&cinfo, TRUE); + + /* Step 4 handle decoder options*/ + if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & DECODE_GRAYSCALE) != 0) + cinfo.out_color_space = JCS_GRAYSCALE; + if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & DECODE_QUANTIZE) != 0) { + cinfo.quantize_colors = TRUE; + cinfo.desired_number_of_colors = GetJpegQuality(); + } + if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & DECODE_DITHER) != 0) + cinfo.dither_mode = m_nDither; + if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & DECODE_ONEPASS) != 0) + cinfo.two_pass_quantize = FALSE; + if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & DECODE_NOSMOOTH) != 0) + cinfo.do_fancy_upsampling = FALSE; + +//: Load true color images as RGB (no quantize) +/* Step 4: set parameters for decompression */ +/* if (cinfo.jpeg_color_space!=JCS_GRAYSCALE) { + * cinfo.quantize_colors = TRUE; + * cinfo.desired_number_of_colors = 128; + *} + */ // + + // Set the scale + cinfo.scale_denom = GetJpegScale(); + + // Borrowed the idea from GIF implementation + if (info.nEscape == -1) { + // Return output dimensions only + jpeg_calc_output_dimensions(&cinfo); + head.biWidth = cinfo.output_width; + head.biHeight = cinfo.output_height; + info.dwType = CXIMAGE_FORMAT_JPG; + jpeg_destroy_decompress(&cinfo); + return true; + } + + /* Step 5: Start decompressor */ + jpeg_start_decompress(&cinfo); + + /* 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. + */ + //Create the image using output dimensions + //Create(cinfo.image_width, cinfo.image_height, 8*cinfo.output_components, CXIMAGE_FORMAT_JPG); + Create(cinfo.output_width, cinfo.output_height, 8*cinfo.output_components, CXIMAGE_FORMAT_JPG); + + if (!pDib) longjmp(jerr.setjmp_buffer, 1); // check if the image has been created + + if (is_exif){ +#if CXIMAGEJPG_SUPPORT_EXIF + if ((m_exifinfo.Xresolution != 0.0) && (m_exifinfo.ResolutionUnit != 0)) + SetXDPI((long)(m_exifinfo.Xresolution/m_exifinfo.ResolutionUnit)); + if ((m_exifinfo.Yresolution != 0.0) && (m_exifinfo.ResolutionUnit != 0)) + SetYDPI((long)(m_exifinfo.Yresolution/m_exifinfo.ResolutionUnit)); +#endif + } else { + switch (cinfo.density_unit) { + case 0: // [andy] fix for aspect ratio... + if((cinfo.Y_density > 0) && (cinfo.X_density > 0)){ + SetYDPI((long)(GetXDPI()*(float(cinfo.Y_density)/float(cinfo.X_density)))); + } + break; + case 2: // [andy] fix: cinfo.X/Y_density is pixels per centimeter + SetXDPI((long)floor(cinfo.X_density * 2.54 + 0.5)); + SetYDPI((long)floor(cinfo.Y_density * 2.54 + 0.5)); + break; + default: + SetXDPI(cinfo.X_density); + SetYDPI(cinfo.Y_density); + } + } + + if (cinfo.out_color_space==JCS_GRAYSCALE){ + SetGrayPalette(); + head.biClrUsed =256; + } else { + if (cinfo.quantize_colors){ + SetPalette(cinfo.actual_number_of_colors, cinfo.colormap[0], cinfo.colormap[1], cinfo.colormap[2]); + head.biClrUsed=cinfo.actual_number_of_colors; + } else { + head.biClrUsed=0; + } + } + + /* 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. + */ + iter.Upset(); + while (cinfo.output_scanline < cinfo.output_height) { + + if (info.nEscape) longjmp(jerr.setjmp_buffer, 1); // - cancel decoding + + (void) jpeg_read_scanlines(&cinfo, buffer, 1); + // info.nProgress = (long)(100*cinfo.output_scanline/cinfo.output_height); + // Step 6a: CMYK->RGB */ + if ((cinfo.num_components==4)&&(cinfo.quantize_colors==FALSE)){ + BYTE k,*dst,*src; + dst=iter.GetRow(); + src=buffer[0]; + for(long x3=0,x4=0; x3<(long)info.dwEffWidth && x4 Step 7A: Swap red and blue components + // not necessary if swapped red and blue definition in jmorecfg.h;ln322 + if ((cinfo.num_components==3)&&(cinfo.quantize_colors==FALSE)){ + BYTE* r0=GetBits(); + for(long y=0;y - cancel decoding + RGBtoBGR(r0,3*head.biWidth); + r0+=info.dwEffWidth; + } + } + + /* Step 8: Release JPEG decompression object */ + /* This is an important step since it will release a good deal of memory. */ + jpeg_destroy_decompress(&cinfo); + + /* 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 true; +} +//////////////////////////////////////////////////////////////////////////////// +#endif //CXIMAGE_SUPPORT_DECODE +//////////////////////////////////////////////////////////////////////////////// +#if CXIMAGE_SUPPORT_ENCODE +//////////////////////////////////////////////////////////////////////////////// +bool CxImageJPG::Encode(CxFile * hFile) +{ + if (EncodeSafeCheck(hFile)) return false; + + if (head.biClrUsed!=0 && !IsGrayScale()){ + strcpy(info.szLastError,"JPEG can save only RGB or GreyScale images"); + return false; + } + + // necessary for EXIF, and for roll backs + long pos=hFile->Tell(); + + /* 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; + /* We use our private extension JPEG error handler. */ + struct jpg_error_mgr jerr; + jerr.buffer=info.szLastError; + /* More stuff */ + int row_stride; /* physical row width in image buffer */ + JSAMPARRAY buffer; /* Output row 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); + /* We set up the normal JPEG error routines, then override error_exit. */ + cinfo.err = jpeg_std_error(&jerr.pub); + jerr.pub.error_exit = ima_jpeg_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. + */ + strcpy(info.szLastError, jerr.buffer); // + jpeg_destroy_compress(&cinfo); + return 0; + } + + /* 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. + */ + + //jpeg_stdio_dest(&cinfo, outfile); + CxFileJpg dest(hFile); + cinfo.dest = &dest; + + /* 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 = GetWidth(); // image width and height, in pixels + cinfo.image_height = GetHeight(); + + if (IsGrayScale()){ + cinfo.input_components = 1; // # of color components per pixel + cinfo.in_color_space = JCS_GRAYSCALE; /* colorspace of input image */ + } else { + 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: + */ + +//#ifdef C_ARITH_CODING_SUPPORTED + if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_ARITHMETIC) != 0) + cinfo.arith_code = TRUE; +//#endif + +//#ifdef ENTROPY_OPT_SUPPORTED + if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_OPTIMIZE) != 0) + cinfo.optimize_coding = TRUE; +//#endif + + if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_GRAYSCALE) != 0) + jpeg_set_colorspace(&cinfo, JCS_GRAYSCALE); + + if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_SMOOTHING) != 0) + cinfo.smoothing_factor = m_nSmoothing; + + jpeg_set_quality(&cinfo, GetJpegQuality(), (GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_BASELINE) != 0); + +//#ifdef C_PROGRESSIVE_SUPPORTED + if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_PROGRESSIVE) != 0) + jpeg_simple_progression(&cinfo); +//#endif + +#ifdef C_LOSSLESS_SUPPORTED + if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_LOSSLESS) != 0) + jpeg_simple_lossless(&cinfo, m_nPredictor, m_nPointTransform); +#endif + + //SetCodecOption(ENCODE_SUBSAMPLE_444 | GetCodecOption(CXIMAGE_FORMAT_JPG),CXIMAGE_FORMAT_JPG); + + // 2x2, 1x1, 1x1 (4:1:1) : High (default sub sampling) + cinfo.comp_info[0].h_samp_factor = 2; + cinfo.comp_info[0].v_samp_factor = 2; + cinfo.comp_info[1].h_samp_factor = 1; + cinfo.comp_info[1].v_samp_factor = 1; + cinfo.comp_info[2].h_samp_factor = 1; + cinfo.comp_info[2].v_samp_factor = 1; + + if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_SUBSAMPLE_422) != 0){ + // 2x1, 1x1, 1x1 (4:2:2) : Medium + cinfo.comp_info[0].h_samp_factor = 2; + cinfo.comp_info[0].v_samp_factor = 1; + cinfo.comp_info[1].h_samp_factor = 1; + cinfo.comp_info[1].v_samp_factor = 1; + cinfo.comp_info[2].h_samp_factor = 1; + cinfo.comp_info[2].v_samp_factor = 1; + } + + if ((GetCodecOption(CXIMAGE_FORMAT_JPG) & ENCODE_SUBSAMPLE_444) != 0){ + // 1x1 1x1 1x1 (4:4:4) : None + cinfo.comp_info[0].h_samp_factor = 1; + cinfo.comp_info[0].v_samp_factor = 1; + cinfo.comp_info[1].h_samp_factor = 1; + cinfo.comp_info[1].v_samp_factor = 1; + cinfo.comp_info[2].h_samp_factor = 1; + cinfo.comp_info[2].v_samp_factor = 1; + } + + cinfo.density_unit=1; + cinfo.X_density=(unsigned short)GetXDPI(); + cinfo.Y_density=(unsigned short)GetYDPI(); + + /* 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 = info.dwEffWidth; /* JSAMPLEs per row in image_buffer */ + + // "8+row_stride" fix heap deallocation problem during debug??? + buffer = (*cinfo.mem->alloc_sarray) + ((j_common_ptr) &cinfo, JPOOL_IMAGE, 8+row_stride, 1); + + CImageIterator iter(this); + + iter.Upset(); + while (cinfo.next_scanline < cinfo.image_height) { + // info.nProgress = (long)(100*cinfo.next_scanline/cinfo.image_height); + iter.GetRow(buffer[0], row_stride); + // not necessary if swapped red and blue definition in jmorecfg.h;ln322 + if (head.biClrUsed==0){ // swap R & B for RGB images + RGBtoBGR(buffer[0], row_stride); // Lance : 1998/09/01 : Bug ID: EXP-2.1.1-9 + } + iter.PrevRow(); + (void) jpeg_write_scanlines(&cinfo, buffer, 1); + } + + /* Step 6: Finish compression */ + jpeg_finish_compress(&cinfo); + + /* Step 7: release JPEG compression object */ + /* This is an important step since it will release a good deal of memory. */ + jpeg_destroy_compress(&cinfo); + + +#if CXIMAGEJPG_SUPPORT_EXIF + if (m_exif && m_exif->m_exifinfo->IsExif){ + // discard useless sections (if any) read from original image + m_exif->DiscardAllButExif(); + // read new created image, to split the sections + hFile->Seek(pos,SEEK_SET); + m_exif->DecodeExif(hFile,EXIF_READ_IMAGE); + // save back the image, adding EXIF section + hFile->Seek(pos,SEEK_SET); + m_exif->EncodeExif(hFile); + } +#endif + + + /* And we're done! */ + return true; +} +//////////////////////////////////////////////////////////////////////////////// +#endif // CXIMAGE_SUPPORT_ENCODE +//////////////////////////////////////////////////////////////////////////////// +#endif // CXIMAGE_SUPPORT_JPG +