/* Store the format name. */ if (fmt_name != NULL) *fmt_name = gif_fmt_name; if (fmt_description != NULL) *fmt_description = gif_fmt_description; return 1; /* GIF */ } static void pngx_set_GIF_palette(png_structp png_ptr, png_infop info_ptr, unsigned char *color_table, unsigned int num_colors) { png_color palette[256]; unsigned int i; PNGX_ASSERT(color_table != NULL && num_colors <= 256); for (i = 0; i < num_colors; ++i) { palette[i].red = color_table[3 * i]; palette[i].green = color_table[3 * i + 1]; palette[i].blue = color_table[3 * i + 2]; } png_set_PLTE(png_ptr, info_ptr, palette, (int)num_colors); } static void pngx_set_GIF_transparent(png_structp png_ptr, png_infop info_ptr, unsigned int transparent) { png_byte trans[256]; unsigned int i; PNGX_ASSERT(transparent < 256); for (i = 0; i < transparent; ++i) trans[i] = 255; trans[transparent] = 0; png_set_tRNS(png_ptr, info_ptr, trans, (int)transparent + 1, NULL); } #if 0 /* ... need to implement ... */ static void pngx_set_GIF_meta(png_structp png_ptr, png_infop info_ptr, struct GIFImage *image, struct GIFExtension *ext) { /* If the GIF specifies an aspect ratio, turn it into a pHYs chunk. */ if (GifScreen.AspectRatio != 0 && GifScreen.AspectRatio != 49) png_set_pHYs(png_ptr, info_ptr, GifScreen.AspectRatio+15, 64, PNG_RESOLUTION_UNKNOWN); /* If the GIF specifies an image offset, turn it into a oFFs chunk. */ if (img->offset_x > 0 && img->offset_y > 0) png_set_oFFs(png_ptr, info_ptr, img->offset_x, img->offset_y, PNG_OFFSET_PIXEL); }
void write_header( const View& view ) { using png_rw_info_t = detail::png_write_support < typename channel_type<typename get_pixel_type<View>::type>::type, typename color_space_type<View>::type >; // Set the image information here. Width and height are up to 2^31, // bit_depth is one of 1, 2, 4, 8, or 16, but valid values also depend on // the color_type selected. color_type is one of PNG_COLOR_TYPE_GRAY, // PNG_COLOR_TYPE_GRAY_ALPHA, PNG_COLOR_TYPE_PALETTE, PNG_COLOR_TYPE_RGB, // or PNG_COLOR_TYPE_RGB_ALPHA. interlace is either PNG_INTERLACE_NONE or // PNG_INTERLACE_ADAM7, and the compression_type and filter_type MUST // currently be PNG_COMPRESSION_TYPE_BASE and PNG_FILTER_TYPE_BASE. REQUIRED png_set_IHDR( get_struct() , get_info() , static_cast< png_image_width::type >( view.width() ) , static_cast< png_image_height::type >( view.height() ) , static_cast< png_bitdepth::type >( png_rw_info_t::_bit_depth ) , static_cast< png_color_type::type >( png_rw_info_t::_color_type ) , _info._interlace_method , _info._compression_type , _info._filter_method ); #ifdef BOOST_GIL_IO_PNG_FLOATING_POINT_SUPPORTED if( _info._valid_cie_colors ) { png_set_cHRM( get_struct() , get_info() , _info._white_x , _info._white_y , _info._red_x , _info._red_y , _info._green_x , _info._green_y , _info._blue_x , _info._blue_y ); } if( _info._valid_file_gamma ) { png_set_gAMA( get_struct() , get_info() , _info._file_gamma ); } #else if( _info._valid_cie_colors ) { png_set_cHRM_fixed( get_struct() , get_info() , _info._white_x , _info._white_y , _info._red_x , _info._red_y , _info._green_x , _info._green_y , _info._blue_x , _info._blue_y ); } if( _info._valid_file_gamma ) { png_set_gAMA_fixed( get_struct() , get_info() , _info._file_gamma ); } #endif // BOOST_GIL_IO_PNG_FLOATING_POINT_SUPPORTED if( _info._valid_icc_profile ) { #if PNG_LIBPNG_VER_MINOR >= 5 png_set_iCCP( get_struct() , get_info() , const_cast< png_charp >( _info._icc_name.c_str() ) , _info._iccp_compression_type , reinterpret_cast< png_const_bytep >( & (_info._profile.front ()) ) , _info._profile_length ); #else png_set_iCCP( get_struct() , get_info() , const_cast< png_charp >( _info._icc_name.c_str() ) , _info._iccp_compression_type , const_cast< png_charp >( & (_info._profile.front()) ) , _info._profile_length ); #endif } if( _info._valid_intent ) { png_set_sRGB( get_struct() , get_info() , _info._intent ); } if( _info._valid_palette ) { png_set_PLTE( get_struct() , get_info() , const_cast< png_colorp >( &_info._palette.front() ) , _info._num_palette ); } if( _info._valid_background ) { png_set_bKGD( get_struct() , get_info() , const_cast< png_color_16p >( &_info._background ) ); } if( _info._valid_histogram ) { png_set_hIST( get_struct() , get_info() , const_cast< png_uint_16p >( &_info._histogram.front() ) ); } if( _info._valid_offset ) { png_set_oFFs( get_struct() , get_info() , _info._offset_x , _info._offset_y , _info._off_unit_type ); } if( _info._valid_pixel_calibration ) { std::vector< const char* > params( _info._num_params ); for( std::size_t i = 0; i < params.size(); ++i ) { params[i] = _info._params[ i ].c_str(); } png_set_pCAL( get_struct() , get_info() , const_cast< png_charp >( _info._purpose.c_str() ) , _info._X0 , _info._X1 , _info._cal_type , _info._num_params , const_cast< png_charp >( _info._units.c_str() ) , const_cast< png_charpp >( ¶ms.front() ) ); } if( _info._valid_resolution ) { png_set_pHYs( get_struct() , get_info() , _info._res_x , _info._res_y , _info._phy_unit_type ); } if( _info._valid_significant_bits ) { png_set_sBIT( get_struct() , get_info() , const_cast< png_color_8p >( &_info._sig_bits ) ); } #ifndef BOOST_GIL_IO_PNG_1_4_OR_LOWER #ifdef BOOST_GIL_IO_PNG_FLOATING_POINT_SUPPORTED if( _info._valid_scale_factors ) { png_set_sCAL( get_struct() , get_info() , this->_info._scale_unit , this->_info._scale_width , this->_info._scale_height ); } #else #ifdef BOOST_GIL_IO_PNG_FIXED_POINT_SUPPORTED if( _info._valid_scale_factors ) { png_set_sCAL_fixed( get_struct() , get_info() , this->_info._scale_unit , this->_info._scale_width , this->_info._scale_height ); } #else if( _info._valid_scale_factors ) { png_set_sCAL_s( get_struct() , get_info() , this->_info._scale_unit , const_cast< png_charp >( this->_info._scale_width.c_str() ) , const_cast< png_charp >( this->_info._scale_height.c_str() ) ); } #endif // BOOST_GIL_IO_PNG_FIXED_POINT_SUPPORTED #endif // BOOST_GIL_IO_PNG_FLOATING_POINT_SUPPORTED #endif // BOOST_GIL_IO_PNG_1_4_OR_LOWER if( _info._valid_text ) { std::vector< png_text > texts( _info._num_text ); for( std::size_t i = 0; i < texts.size(); ++i ) { png_text pt; pt.compression = _info._text[i]._compression; pt.key = const_cast< png_charp >( this->_info._text[i]._key.c_str() ); pt.text = const_cast< png_charp >( this->_info._text[i]._text.c_str() ); pt.text_length = _info._text[i]._text.length(); texts[i] = pt; } png_set_text( get_struct() , get_info() , &texts.front() , _info._num_text ); } if( _info._valid_modification_time ) { png_set_tIME( get_struct() , get_info() , const_cast< png_timep >( &_info._mod_time ) ); } if( _info._valid_transparency_factors ) { int sample_max = ( 1u << _info._bit_depth ); /* libpng doesn't reject a tRNS chunk with out-of-range samples */ if( !( ( _info._color_type == PNG_COLOR_TYPE_GRAY && (int) _info._trans_values[0].gray > sample_max ) || ( _info._color_type == PNG_COLOR_TYPE_RGB &&( (int) _info._trans_values[0].red > sample_max || (int) _info._trans_values[0].green > sample_max || (int) _info._trans_values[0].blue > sample_max ) ) ) ) { //@todo Fix that once reading transparency values works /* png_set_tRNS( get_struct() , get_info() , trans , num_trans , trans_values ); */ } } // Compression Levels - valid values are [0,9] png_set_compression_level( get_struct() , _info._compression_level ); png_set_compression_mem_level( get_struct() , _info._compression_mem_level ); png_set_compression_strategy( get_struct() , _info._compression_strategy ); png_set_compression_window_bits( get_struct() , _info._compression_window_bits ); png_set_compression_method( get_struct() , _info._compression_method ); png_set_compression_buffer_size( get_struct() , _info._compression_buffer_size ); #ifdef BOOST_GIL_IO_PNG_DITHERING_SUPPORTED // Dithering if( _info._set_dithering ) { png_set_dither( get_struct() , &_info._dithering_palette.front() , _info._dithering_num_palette , _info._dithering_maximum_colors , &_info._dithering_histogram.front() , _info._full_dither ); } #endif // BOOST_GIL_IO_PNG_DITHERING_SUPPORTED // Filter if( _info._set_filter ) { png_set_filter( get_struct() , 0 , _info._filter ); } // Invert Mono if( _info._invert_mono ) { png_set_invert_mono( get_struct() ); } // True Bits if( _info._set_true_bits ) { png_set_sBIT( get_struct() , get_info() , &_info._true_bits.front() ); } // sRGB Intent if( _info._set_srgb_intent ) { png_set_sRGB( get_struct() , get_info() , _info._srgb_intent ); } // Strip Alpha if( _info._strip_alpha ) { png_set_strip_alpha( get_struct() ); } // Swap Alpha if( _info._swap_alpha ) { png_set_swap_alpha( get_struct() ); } png_write_info( get_struct() , get_info() ); }
/*! * Insert an image in the current document. * * The image is found in an in_line Psiconv element. */ UT_Error IE_Imp_Psion::insertImage(const psiconv_in_line_layout in_line) { psiconv_sketch_f sketch_file; psiconv_paint_data_section paint_data; png_byte *row; UT_UTF8String props,iname,buffer; int x,y,xsize,ysize; UT_uint32 iid; // Get the sketch file sketch_file = (psiconv_sketch_f) (in_line->object->object->file); paint_data = sketch_file->sketch_sec->picture; xsize = paint_data->xsize; ysize = paint_data->ysize; UT_DEBUGMSG(("PSION: Picture %d x %d\n",xsize,ysize)); // Prepare the PNG structure for writing png_structp png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); if (!png_ptr) return UT_IE_IMPORTERROR; // Prepare the PNG structure for info png_infop info_ptr = png_create_info_struct(png_ptr); if (!info_ptr) { png_destroy_write_struct(&png_ptr,NULL); return UT_IE_IMPORTERROR; } // Prepare PNG error handling if (setjmp(png_jmpbuf(png_ptr))) { UT_DEBUGMSG(("PSION: PNG Error handler")); png_destroy_write_struct(&png_ptr, &info_ptr); return (UT_IE_IMPORTERROR); } // Use our own functions for writing the PNG data stream UT_ByteBufPtr image_buffer(new UT_ByteBuf); png_set_write_fn(png_ptr, (void *)image_buffer.get(), write_png_data, write_png_flush); // Set picture data png_set_IHDR(png_ptr,info_ptr,xsize, ysize,8,PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); png_set_oFFs(png_ptr,info_ptr, sketch_file->sketch_sec->picture_data_x_offset, sketch_file->sketch_sec->picture_data_y_offset, PNG_OFFSET_PIXEL); // Not yet implemented: magnification, cuts // Allocate one row of pixels if (!(row = (png_byte *) malloc(sizeof(png_byte) * xsize * 3))) { png_destroy_write_struct(&png_ptr,&info_ptr); return UT_IE_IMPORTERROR; } // Writing the PNG file png_write_info(png_ptr,info_ptr); for (y = 0; y < ysize; y++) { for (x = 0; x < xsize; x++) { row[3*x] = (png_byte) (paint_data->red[y * xsize + x] * 255.0); row[3*x+1] = (png_byte) (paint_data->green[y * xsize + x] * 255.0); row[3*x+2] = (png_byte) (paint_data->blue[y * xsize + x] * 255.0); UT_DEBUGMSG(("PSION: Pixels %d %d %d\n",row[3*x],row[3*x+1],row[3*x+2])); } UT_DEBUGMSG(("PSION: Row %d\n",y)); png_write_row(png_ptr,row); } png_write_end(png_ptr,info_ptr); free(row); png_destroy_write_struct(&png_ptr,&info_ptr); // Width UT_UTF8String_sprintf(buffer,"width:%dpt",xsize); props += buffer; // Height UT_UTF8String_sprintf(buffer,"; height:%dpt",ysize); props += buffer; // Unique ID iid = getDoc()->getUID(UT_UniqueId::Image); UT_UTF8String_sprintf(iname,"image_%d",iid); // Set the properties // Note that we both have to add a Data Item (containing the image) and // the object (just a reference to the Data Item). const PP_PropertyVector propsArray = { "dataid", iname.utf8_str(), "props", props.utf8_str() }; if (!(getDoc()->appendObject(PTO_Image,propsArray))) return UT_IE_IMPORTERROR; if (!(getDoc()->createDataItem(iname.utf8_str(), false, image_buffer, "image/png",NULL))) return UT_IE_IMPORTERROR; return UT_OK; }
int main( int argc, char *argv[] ) { int f, rowbytes; char buf[256]; static FILE *fpout; /* "static" prevents setjmp corruption */ png_structp write_ptr; png_infop write_info_ptr, end_info_ptr; png_bytep row_buf, here; png_uint_32 y; png_textp text_ptr, new_text_ptr; int num_text; int interlace_type, compression_type, filter_type, bit_depth, color_type; int it, ct, ft, bd, clrt; png_uint_32 width, height, w, h; int duration; if( argc < 4 ) { printf( "makeanim v0.2\nusage: makeanim <duration in milliseconds> <input files ...> <output file>\n" ); printf( "example: makeanim 1500 a00.png a01.png a02.png a03.png a04.png a.anim\n" ); return 1; } duration = atoi( argv[1] ); if( duration < 1 ) { printf( "duration is incorrect\n" ); return 1; } numfiles = argc - 3; input = (struct inputstruct *)malloc( sizeof( struct inputstruct ) * numfiles ); if( !input ) return 1; for( f = 0; f < numfiles; f++ ) { input[f].name = argv[f + 2]; printf( "opening file %d, \"%s\"\n", f, input[f].name ); /* open the file handle */ input[f].file = fopen( input[f].name, "rb" ); if( input[f].file == NULL ) { printf( "fopen() failed\n" ); return 1; } /* check if it's PNG */ if( fread( buf, 1, 8, input[f].file ) != 8 ) { printf( "fread() failed for file \"%s\"\n", input[f].name ); return 1; } if( png_sig_cmp( buf, (png_size_t)0, 8 ) ) { printf( "not a PNG file\n" ); return 1; } fseek( input[f].file, 0, SEEK_SET ); /* allocate read structure */ input[f].read_ptr = png_create_read_struct( PNG_LIBPNG_VER_STRING, (png_voidp)NULL, (png_error_ptr)NULL, (png_error_ptr)NULL ); if( input[f].read_ptr == NULL ) { printf( "png_create_read_struct() failed\n" ); return 1; } /* allocate read info structure */ input[f].read_info_ptr = png_create_info_struct( input[f].read_ptr ); if( input[f].read_info_ptr == NULL ) { printf( "png_create_info_struct() failed\n" ); return 1; } /* set error handler code */ if( setjmp( input[f].read_ptr->jmpbuf ) ) { printf( "libpng read error\n" ); return 1; } /* initialize stream */ png_init_io( input[f].read_ptr, input[f].file ); png_set_read_status_fn( input[f].read_ptr, NULL ); /* read png info struct */ png_read_info( input[f].read_ptr, input[f].read_info_ptr ); /* get the info */ if( !png_get_IHDR( input[f].read_ptr, input[f].read_info_ptr, &w, &h, &bd, &clrt, &it, &ct, &ft ) ) { printf( "png_get_IHDR() failed\n" ); return 1; } /* save the info of the first frame */ if( f == 0 ) { width = w; height = h; bit_depth = bd; color_type = clrt; interlace_type = it; compression_type = ct; filter_type = ft; } /* compare all other frames to first frame */ else if( (w != width) || (h != height) || (bd != bit_depth) || (clrt != color_type) || (it != interlace_type) || (ct != compression_type) || (ft != filter_type) ) { if( w != width ) printf( "width is different\n" ); if( h != height ) printf( "height is different\n" ); if( bd != bit_depth ) printf( "bit depth is different\n" ); if( clrt != color_type ) printf( "color type is different\n" ); if( it != interlace_type ) printf( "interlace type is different\n" ); if( ct != compression_type ) printf( "compression type is different\n" ); if( ft != filter_type ) printf( "filter type is different\n" ); return 1; } } row_buf = (png_bytep)NULL; /* open output file */ printf( "opening file \"%s\"\n", argv[numfiles + 2] ); fpout = fopen( argv[numfiles + 2], "wb" ); if( fpout == NULL ) { printf( "fopen() failed\n" ); return 1; } /* allocate write structure */ write_ptr = png_create_write_struct( PNG_LIBPNG_VER_STRING, (png_voidp)NULL, (png_error_ptr)NULL, (png_error_ptr)NULL ); /* allocate info structures */ write_info_ptr = png_create_info_struct( write_ptr ); end_info_ptr = png_create_info_struct( write_ptr ); /* error handling */ if( setjmp( write_ptr->jmpbuf ) ) { printf( "libpng write error\n" ); return 1; } /* initialize output stream */ png_init_io( write_ptr, fpout ); png_set_write_status_fn( write_ptr, NULL ); /* set info */ png_set_IHDR( write_ptr, write_info_ptr, width * numfiles, height, bit_depth, color_type, PNG_INTERLACE_NONE, compression_type, filter_type); /* image characteristics */ { png_color_16p background; double white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; double gamma; int intent; png_uint_16p hist; png_uint_32 offset_x, offset_y; int unit_type; png_charp purpose, units; png_charpp params; png_int_32 X0, X1; int type, nparams; png_uint_32 res_x, res_y; png_colorp palette; int num_palette; png_color_8p sig_bit; png_bytep trans; int num_trans; png_color_16p trans_values; /* background color */ if( png_get_bKGD( input[0].read_ptr, input[0].read_info_ptr, &background ) ) { png_set_bKGD( write_ptr, write_info_ptr, background ); } if( png_get_cHRM( input[0].read_ptr, input[0].read_info_ptr, &white_x, &white_y, &red_x, &red_y, &green_x, &green_y, &blue_x, &blue_y ) ) { png_set_cHRM( write_ptr, write_info_ptr, white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y ); } /* gamma */ if( png_get_gAMA( input[0].read_ptr, input[0].read_info_ptr, &gamma ) ) { png_set_gAMA( write_ptr, write_info_ptr, gamma ); } /* rendering intent */ if( png_get_sRGB( input[0].read_ptr, input[0].read_info_ptr, &intent ) ) { png_set_sRGB( write_ptr, write_info_ptr, intent ); } /* Histogram */ if( png_get_hIST( input[0].read_ptr, input[0].read_info_ptr, &hist ) ) { png_set_hIST( write_ptr, write_info_ptr, hist ); } /* offsets */ if( png_get_oFFs( input[0].read_ptr, input[0].read_info_ptr, &offset_x, &offset_y, &unit_type ) ) { png_set_oFFs( write_ptr, write_info_ptr, offset_x, offset_y, unit_type ); } if( png_get_pCAL( input[0].read_ptr, input[0].read_info_ptr, &purpose, &X0, &X1, &type, &nparams, &units, ¶ms ) ) { png_set_pCAL( write_ptr, write_info_ptr, purpose, X0, X1, type, nparams, units, params ); } /* pixel density */ if( png_get_pHYs( input[0].read_ptr, input[0].read_info_ptr, &res_x, &res_y, &unit_type ) ) { png_set_pHYs( write_ptr, write_info_ptr, res_x, res_y, unit_type ); } /* text chunks */ /* if( png_get_text( input[0].read_ptr, input[0].read_info_ptr, &text_ptr, &num_text ) > 0 ) { printf( "Handling %d tEXt/zTXt chunks\n", num_text ); png_set_text( write_ptr, write_info_ptr, text_ptr, num_text ); } */ /* palette */ if( png_get_PLTE( input[0].read_ptr, input[0].read_info_ptr, &palette, &num_palette ) ) { png_set_PLTE( write_ptr, write_info_ptr, palette, num_palette ); } /* significant bits */ if( png_get_sBIT( input[0].read_ptr, input[0].read_info_ptr, &sig_bit ) ) { png_set_sBIT( write_ptr, write_info_ptr, sig_bit ); } /* transparency */ if( png_get_tRNS( input[0].read_ptr, input[0].read_info_ptr, &trans, &num_trans, &trans_values ) ) { png_set_tRNS( write_ptr, write_info_ptr, trans, num_trans, trans_values ); } } /* text chunks */ num_text = 0; if( !png_get_text( input[0].read_ptr, input[0].read_info_ptr, &text_ptr, &num_text ) ) num_text = 0; new_text_ptr = (struct png_text_struct *)malloc( sizeof( struct png_text_struct ) * num_text + 1 ); if( !new_text_ptr ) { printf( "malloc() failed\n" ); return 1; } memcpy( new_text_ptr, text_ptr, sizeof( struct png_text_struct ) * num_text ); snprintf( buf, 255, "SDL_anim %d %d %d", duration, width, numfiles ); buf[255] = 0; new_text_ptr[num_text].compression = PNG_TEXT_COMPRESSION_NONE; new_text_ptr[num_text].key = "format"; new_text_ptr[num_text].text = buf; new_text_ptr[num_text].text_length = strlen( buf ); num_text++; png_set_text( write_ptr, write_info_ptr, new_text_ptr, num_text ); /* write info */ png_write_info( write_ptr, write_info_ptr ); /* allocate buffer */ rowbytes = png_get_rowbytes( input[0].read_ptr, input[0].read_info_ptr ); row_buf = (png_bytep)png_malloc( write_ptr, rowbytes * numfiles ); if( row_buf == NULL ) { printf( "png_malloc() failed\n" ); return 1; } /* copy raw data */ for( y = 0; y < height; y++ ) { /* grab a scanline from each file */ here = row_buf; for( f = 0; f < numfiles; f++ ) { png_read_rows( input[f].read_ptr, (png_bytepp)&here, (png_bytepp)NULL, 1 ); here += rowbytes; } /* write the long scanline */ png_write_rows( write_ptr, (png_bytepp)&row_buf, 1 ); } /* end io */ for( f = 0; f < numfiles; f++ ) png_read_end( input[f].read_ptr, end_info_ptr ); png_write_end( write_ptr, end_info_ptr ); /* cleanup */ png_free( write_ptr, row_buf ); for( f = 0; f < numfiles; f++ ) { png_destroy_read_struct( &input[f].read_ptr, &input[f].read_info_ptr, &end_info_ptr); fclose( input[f].file ); } png_destroy_write_struct( &write_ptr, &write_info_ptr ); fclose( fpout ); return 0; }
bool Q_INTERNAL_WIN_NO_THROW QPNGImageWriter::writeImage(const QImage& image, volatile int quality_in, const QString &description, int off_x_in, int off_y_in) { QPoint offset = image.offset(); int off_x = off_x_in + offset.x(); int off_y = off_y_in + offset.y(); png_structp png_ptr; png_infop info_ptr; png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,0,0,0); if (!png_ptr) { return false; } png_set_error_fn(png_ptr, 0, 0, qt_png_warning); info_ptr = png_create_info_struct(png_ptr); if (!info_ptr) { png_destroy_write_struct(&png_ptr, 0); return false; } if (setjmp(png_jmpbuf(png_ptr))) { png_destroy_write_struct(&png_ptr, &info_ptr); return false; } int quality = quality_in; if (quality >= 0) { if (quality > 9) { qWarning("PNG: Quality %d out of range", quality); quality = 9; } png_set_compression_level(png_ptr, quality); } png_set_write_fn(png_ptr, (void*)this, qpiw_write_fn, qpiw_flush_fn); int color_type = 0; if (image.colorCount()) { if (image.isGrayscale()) color_type = PNG_COLOR_TYPE_GRAY; else color_type = PNG_COLOR_TYPE_PALETTE; } else if (image.format() == QImage::Format_Grayscale8) color_type = PNG_COLOR_TYPE_GRAY; else if (image.hasAlphaChannel()) color_type = PNG_COLOR_TYPE_RGB_ALPHA; else color_type = PNG_COLOR_TYPE_RGB; png_set_IHDR(png_ptr, info_ptr, image.width(), image.height(), image.depth() == 1 ? 1 : 8, // per channel color_type, 0, 0, 0); // sets #channels if (gamma != 0.0) { png_set_gAMA(png_ptr, info_ptr, 1.0/gamma); } if (image.format() == QImage::Format_MonoLSB) png_set_packswap(png_ptr); if (color_type == PNG_COLOR_TYPE_PALETTE) { // Paletted int num_palette = qMin(256, image.colorCount()); png_color palette[256]; png_byte trans[256]; int num_trans = 0; for (int i=0; i<num_palette; i++) { QRgb rgba=image.color(i); palette[i].red = qRed(rgba); palette[i].green = qGreen(rgba); palette[i].blue = qBlue(rgba); trans[i] = qAlpha(rgba); if (trans[i] < 255) { num_trans = i+1; } } png_set_PLTE(png_ptr, info_ptr, palette, num_palette); if (num_trans) { png_set_tRNS(png_ptr, info_ptr, trans, num_trans, 0); } } // Swap ARGB to RGBA (normal PNG format) before saving on // BigEndian machines if (QSysInfo::ByteOrder == QSysInfo::BigEndian) { png_set_swap_alpha(png_ptr); } // Qt==ARGB==Big(ARGB)==Little(BGRA). But RGB888 is RGB regardless if (QSysInfo::ByteOrder == QSysInfo::LittleEndian && image.format() != QImage::Format_RGB888) { png_set_bgr(png_ptr); } if (off_x || off_y) { png_set_oFFs(png_ptr, info_ptr, off_x, off_y, PNG_OFFSET_PIXEL); } if (frames_written > 0) png_set_sig_bytes(png_ptr, 8); if (image.dotsPerMeterX() > 0 || image.dotsPerMeterY() > 0) { png_set_pHYs(png_ptr, info_ptr, image.dotsPerMeterX(), image.dotsPerMeterY(), PNG_RESOLUTION_METER); } set_text(image, png_ptr, info_ptr, description); png_write_info(png_ptr, info_ptr); if (image.depth() != 1) png_set_packing(png_ptr); if (color_type == PNG_COLOR_TYPE_RGB && image.format() != QImage::Format_RGB888) png_set_filler(png_ptr, 0, QSysInfo::ByteOrder == QSysInfo::BigEndian ? PNG_FILLER_BEFORE : PNG_FILLER_AFTER); if (looping >= 0 && frames_written == 0) { uchar data[13] = "NETSCAPE2.0"; // 0123456789aBC data[0xB] = looping%0x100; data[0xC] = looping/0x100; png_write_chunk(png_ptr, const_cast<png_bytep>((const png_byte *)"gIFx"), data, 13); } if (ms_delay >= 0 || disposal!=Unspecified) { uchar data[4]; data[0] = disposal; data[1] = 0; data[2] = (ms_delay/10)/0x100; // hundredths data[3] = (ms_delay/10)%0x100; png_write_chunk(png_ptr, const_cast<png_bytep>((const png_byte *)"gIFg"), data, 4); } int height = image.height(); int width = image.width(); switch (image.format()) { case QImage::Format_Mono: case QImage::Format_MonoLSB: case QImage::Format_Indexed8: case QImage::Format_Grayscale8: case QImage::Format_RGB32: case QImage::Format_ARGB32: case QImage::Format_RGB888: { png_bytep* row_pointers = new png_bytep[height]; for (int y=0; y<height; y++) row_pointers[y] = const_cast<png_bytep>(image.constScanLine(y)); png_write_image(png_ptr, row_pointers); delete [] row_pointers; } break; default: { QImage::Format fmt = image.hasAlphaChannel() ? QImage::Format_ARGB32 : QImage::Format_RGB32; QImage row; png_bytep row_pointers[1]; for (int y=0; y<height; y++) { row = image.copy(0, y, width, 1).convertToFormat(fmt); row_pointers[0] = const_cast<png_bytep>(row.constScanLine(0)); png_write_rows(png_ptr, row_pointers, 1); } } break; } png_write_end(png_ptr, info_ptr); frames_written++; png_destroy_write_struct(&png_ptr, &info_ptr); return true; }
//--------------------------------------------------------------------------- void __fastcall TDeePNG::SaveToStream(Classes::TStream * Stream) { // SaveToStream method // warning: this method would change the pixelformat to pf24bit // if the pixelformat is pfDevice, pf15bit, pf16bit, or pfCustom. png_structp png_ptr = NULL; png_infop info_ptr = NULL; png_bytep row_buffer = NULL; try { // create png_struct png_ptr = png_create_write_struct_2 (PNG_LIBPNG_VER_STRING, (png_voidp)this, DeePNG_error, DeePNG_warning, (png_voidp)this, DeePNG_malloc, DeePNG_free); // create png_info info_ptr = png_create_info_struct(png_ptr); // set write function png_set_write_fn(png_ptr, (png_voidp)Stream, DeePNG_write_data, DeePNG_flush); // set IHDR if(PixelFormat == pfDevice || PixelFormat == pf15bit || PixelFormat == pf16bit || PixelFormat == pfCustom) PixelFormat = pf24bit; bool grayscale = IsGrayscaleBitmap(this); int colordepth = GetBitmapColorDepth(this); int w = Width; int h = Height; int color_type; if(grayscale) color_type = PNG_COLOR_TYPE_GRAY; else if(colordepth <= 8) color_type = PNG_COLOR_TYPE_PALETTE; else if(colordepth == 32) color_type = PNG_COLOR_TYPE_RGB_ALPHA; else color_type = PNG_COLOR_TYPE_RGB; png_set_IHDR(png_ptr, info_ptr, w, h, colordepth < 8 ? colordepth : 8, color_type, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); // set oFFs if(ofs_set) png_set_oFFs(png_ptr, info_ptr, ofs_x, ofs_y, ofs_unit); // set palette if(color_type == PNG_COLOR_TYPE_PALETTE) { png_color *palette = (png_colorp)png_malloc(png_ptr, 256 * sizeof(png_color)); PALETTEENTRY palentry[256]; int num_palette = GetPaletteEntries(Palette, 0, (1<<colordepth), palentry); for(int i = 0; i < num_palette; i++) { palette[i].red = palentry[i].peRed; palette[i].green = palentry[i].peGreen; palette[i].blue = palentry[i].peBlue; } png_set_PLTE(png_ptr, info_ptr, palette, num_palette); } // write info png_write_info(png_ptr, info_ptr); // write vpAg private chunk if(vpag_set) { png_byte png_vpAg[5] = {118, 112, 65, 103, '\0'}; unsigned char vpag_chunk_data[9]; #define PNG_write_be32(p, a) (\ ((unsigned char *)(p))[0] = (unsigned char)(((a) >>24) & 0xff), \ ((unsigned char *)(p))[1] = (unsigned char)(((a) >>16) & 0xff), \ ((unsigned char *)(p))[2] = (unsigned char)(((a) >> 8) & 0xff), \ ((unsigned char *)(p))[3] = (unsigned char)(((a) ) & 0xff) ) PNG_write_be32(vpag_chunk_data, vpag_w); PNG_write_be32(vpag_chunk_data + 4, vpag_h); vpag_chunk_data[8] = (unsigned char)vpag_unit; png_write_chunk(png_ptr, png_vpAg, vpag_chunk_data, 9); } /* // change RGB order if(color_type = PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) png_set_bgr(png_ptr); // ???? why this does not work ? */ // write image if(color_type == PNG_COLOR_TYPE_RGB) { row_buffer = (png_bytep)png_malloc(png_ptr, 3 * w + 6); try { png_bytep row_pointer = row_buffer; for(int i = 0; i < h; i++) { png_bytep in = (png_bytep)ScanLine[i]; png_bytep out = row_buffer; for(int x = 0; x < w; x++) { out[2] = in[0]; out[1] = in[1]; out[0] = in[2]; out += 3; in += 3; } png_write_row(png_ptr, row_pointer); } } catch(...) { png_free(png_ptr, row_buffer); throw; } png_free(png_ptr, row_buffer); } else if(color_type == PNG_COLOR_TYPE_RGB_ALPHA) { row_buffer = (png_bytep)png_malloc(png_ptr, 4 * w + 6); try { png_bytep row_pointer = row_buffer; for(int i = 0; i < h; i++) { png_bytep in = (png_bytep)ScanLine[i]; png_bytep out = row_buffer; for(int x = 0; x < w; x++) { out[2] = in[0]; out[1] = in[1]; out[0] = in[2]; out[3] = in[3]; out += 4; in += 4; } png_write_row(png_ptr, row_pointer); } } catch(...) { png_free(png_ptr, row_buffer); throw; } png_free(png_ptr, row_buffer); } else { for(int i = 0; i < h; i++) { png_bytep row_pointer = (png_bytep)ScanLine[i]; png_write_row(png_ptr, row_pointer); } } // finish writing png_write_end(png_ptr, info_ptr); } catch(...) { png_destroy_write_struct(&png_ptr, &info_ptr); throw; } png_destroy_write_struct(&png_ptr, &info_ptr); }