VariantMap SaveAdapter::load( vfs::NFile f ) { if( f.isOpen() ) { ByteArray data = f.readAll(); bool jsonParsingOk; Variant ret = Json::parse( data.toString(), jsonParsingOk ); if( jsonParsingOk ) { return ret.toMap(); } else { Logger::warning( "Can't parse file " + f.path().toString() + " error: " + ret.toString() ); Logger::warning( "Last parsed object is " + Json::lastParsedObject() ); } } else { Logger::warning( "Can't find file " + f.path().toString() ); } return VariantMap(); }
//! returns true if the file maybe is able to be loaded by this class bool PictureLoaderPng::isALoadableFileFormat( vfs::NFile file) const { if( !file.isOpen() ) return false; png_byte buffer[8]; // Read the first few bytes of the PNG file if( file.read(buffer, 8) != 8 ) return false; // Check if it really is a PNG file return !png_sig_cmp(buffer, 0, 8); }
void ResourceLoader::loadAtlases(vfs::NFile archiveInfo, bool lazy) { if( archiveInfo.isOpen() ) { VariantMap vm = config::load( archiveInfo ); StringArray atlasNames = vm.get( atlasListSection ).toStringArray(); for( auto& name : atlasNames ) { if( lazy ) { gfx::PictureBank::instance().addAtlas( name ); } else { gfx::PictureBank::instance().loadAtlas( name ); } } } }
// load in the image data Picture PictureLoaderPng::load(vfs::NFile file , bool streaming) const { if(!file.isOpen()) { Logger::warning( "LOAD PNG: can't open file " + file.path().toString() ); return Picture::getInvalid(); } png_byte buffer[8]; // Read the first few bytes of the PNG file if( file.read(buffer, 8) != 8 ) { Logger::warning( "LOAD PNG: can't read file " + file.path().toString() ); return Picture::getInvalid(); } // Check if it really is a PNG file if( png_sig_cmp(buffer, 0, 8) ) { Logger::warning( "LOAD PNG: not really a png " + file.path().toString() ); return Picture::getInvalid(); } // Allocate the png read struct png_structp png_ptr = png_create_read_struct( PNG_LIBPNG_VER_STRING, NULL, (png_error_ptr)png_cpexcept_error, (png_error_ptr)png_cpexcept_warn); if( !png_ptr ) { Logger::warning( "LOAD PNG: Internal PNG create read struct failure " + file.path().toString() ); return Picture::getInvalid(); } // Allocate the png info struct png_infop info_ptr = png_create_info_struct(png_ptr); if (!info_ptr) { Logger::warning( "LOAD PNG: Couldn't create image information for PNG file " + file.path().toString() ); png_destroy_read_struct(&png_ptr, NULL, NULL); return Picture::getInvalid(); } // for proper error handling if (setjmp(png_jmpbuf(png_ptr))) { png_destroy_read_struct(&png_ptr, &info_ptr, NULL); Logger::warning( "LOAD PNG: Error reading the PNG file. " + file.path().toString() ); return Picture::getInvalid(); } // changed by zola so we don't need to have public FILE pointers png_set_read_fn(png_ptr, &file, user_read_data_fcn); png_set_sig_bytes(png_ptr, 8); // Tell png that we read the signature png_read_info(png_ptr, info_ptr); // Read the info section of the png file unsigned int Width; unsigned int Height; int BitDepth; int ColorType; { // Use temporary variables to avoid passing casted pointers png_uint_32 w,h; // Extract info png_get_IHDR(png_ptr, info_ptr, &w, &h, &BitDepth, &ColorType, NULL, NULL, NULL); Width=w; Height=h; } // Convert palette color to true color if (ColorType==PNG_COLOR_TYPE_PALETTE) png_set_palette_to_rgb(png_ptr); // Convert low bit colors to 8 bit colors if (BitDepth < 8) { if (ColorType==PNG_COLOR_TYPE_GRAY || ColorType==PNG_COLOR_TYPE_GRAY_ALPHA) png_set_expand_gray_1_2_4_to_8(png_ptr); else png_set_packing(png_ptr); } if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) png_set_tRNS_to_alpha(png_ptr); // Convert high bit colors to 8 bit colors if (BitDepth == 16) png_set_strip_16(png_ptr); // Convert gray color to true color if (ColorType==PNG_COLOR_TYPE_GRAY || ColorType==PNG_COLOR_TYPE_GRAY_ALPHA) png_set_gray_to_rgb(png_ptr); int intent; const double screen_gamma = 2.2; if (png_get_sRGB(png_ptr, info_ptr, &intent)) png_set_gamma(png_ptr, screen_gamma, 0.45455); else { double image_gamma; if (png_get_gAMA(png_ptr, info_ptr, &image_gamma)) png_set_gamma(png_ptr, screen_gamma, image_gamma); else png_set_gamma(png_ptr, screen_gamma, 0.45455); } // Update the changes in between, as we need to get the new color type // for proper processing of the RGBA type png_read_update_info(png_ptr, info_ptr); { // Use temporary variables to avoid passing casted pointers png_uint_32 w,h; // Extract info png_get_IHDR(png_ptr, info_ptr, &w, &h, &BitDepth, &ColorType, NULL, NULL, NULL); Width=w; Height=h; } // Convert RGBA to BGRA if (ColorType==PNG_COLOR_TYPE_RGB_ALPHA) { png_set_bgr(png_ptr); } if( !Height ) { Logger::warning( "LOAD PNG: Internal PNG create row pointers failure %s", file.path().toCString() ); png_destroy_read_struct(&png_ptr, NULL, NULL); return Picture::getInvalid(); } // Create array of pointers to rows in image data std::vector<unsigned char> bytes; int pixelSize = (ColorType==PNG_COLOR_TYPE_RGB_ALPHA ? 4 : 3); bytes.resize( Width * Height * pixelSize ); ScopedArrayPtr<unsigned char*> RowPointers( (unsigned char**)new png_bytep[ Height ] ); // Fill array of pointers to rows in image data unsigned char* data = &bytes[0]; for(unsigned int i=0; i<Height; ++i) { RowPointers.data()[i] = data; data += Width * pixelSize; } // for proper error handling if( setjmp( png_jmpbuf( png_ptr ) ) ) { png_destroy_read_struct(&png_ptr, &info_ptr, NULL); return Picture::getInvalid(); } // Read data using the library function that handles all transformations including interlacing png_read_image( png_ptr, RowPointers.data() ); png_read_end( png_ptr, NULL ); png_destroy_read_struct( &png_ptr, &info_ptr, 0 ); // Clean up memory // Create the image structure to be filled by png data Picture pic; if( ColorType==PNG_COLOR_TYPE_RGB_ALPHA ) { pic = Picture( Size( Width, Height ), bytes.data(), streaming ); } else { std::vector<unsigned char> b4; b4.resize( Width * Height * 4 ); for( unsigned int index=0; index < Width * Height; index++ ) { b4[ index*4+3 ] = 0xff; b4[ index*4+0 ] = bytes[index*3+2]; b4[ index*4+1 ] = bytes[index*3+1]; b4[ index*4+2 ] = bytes[index*3+0]; } pic = Picture( Size( Width, Height ), b4.data(), streaming ); } return pic; }