Page Speed Optimization Libraries
1.4.26.1
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00001 /* 00002 * Copyright 2011 Google Inc. 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http:///www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00017 00018 #ifndef NET_INSTAWEB_SPRITER_LIBPNG_IMAGE_LIBRARY_H_ 00019 #define NET_INSTAWEB_SPRITER_LIBPNG_IMAGE_LIBRARY_H_ 00020 00021 #include <png.h> 00022 #include "net/instaweb/spriter/image_library_interface.h" 00023 #include "net/instaweb/util/public/string.h" 00024 00025 namespace net_instaweb { 00026 namespace spriter { 00027 00034 class LibpngImageLibrary : public ImageLibraryInterface { 00035 public: 00036 LibpngImageLibrary(const FilePath& base_input_path, 00037 const FilePath& base_output_path, 00038 Delegate* delegate); 00039 virtual ~LibpngImageLibrary() {} 00040 00041 protected: 00043 class Image : public ImageLibraryInterface::Image { 00044 public: 00046 Image(ImageLibraryInterface* lib, 00047 png_structp png_struct, png_infop png_info, png_bytep* rows); 00048 virtual ~Image(); 00049 00050 virtual bool GetDimensions(int* out_width, int* out_height) const; 00051 const png_bytep* Rows() const; 00052 00053 private: 00054 png_structp png_struct_; 00055 png_infop png_info_; 00056 png_bytep* rows_; 00057 DISALLOW_COPY_AND_ASSIGN(Image); 00058 }; 00059 00062 virtual ImageLibraryInterface::Image* ReadFromFile(const FilePath& path); 00063 00067 class Canvas : public ImageLibraryInterface::Canvas { 00068 public: 00069 Canvas(ImageLibraryInterface* lib, const Delegate* d, 00070 const GoogleString& base_out_path, 00071 int width, int height); 00072 virtual ~Canvas(); 00073 virtual bool DrawImage(const ImageLibraryInterface::Image* image, int x, 00074 int y); 00075 virtual bool WriteToFile(const FilePath& write_path, ImageFormat format); 00076 00077 private: 00078 const Delegate* delegate_; 00079 const GoogleString base_out_path_; 00080 int width_; 00081 int height_; 00082 png_bytep* rows_; 00083 DISALLOW_COPY_AND_ASSIGN(Canvas); 00084 }; 00085 00086 virtual ImageLibraryInterface::Canvas* CreateCanvas(int width, int height); 00087 00088 private: 00089 friend class LibpngImageLibraryTest; 00090 DISALLOW_COPY_AND_ASSIGN(LibpngImageLibrary); 00091 }; 00092 00093 } 00094 } 00095 00096 #endif ///< NET_INSTAWEB_SPRITER_LIBPNG_IMAGE_LIBRARY_H_