First round of dead file removal

experimental/flocking_geese/nacl_app/png_loader.h

-// Copyright (c) 2011 The Native Client Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef PNG_LOADER_H_
-#define PNG_LOADER_H_
-
-#include <png.h>
-#include <string.h>
-
-#include "boost/scoped_array.hpp"
-#include "ppapi/cpp/size.h"
-#include "threading/thread_condition.h"
-#include "url_io/web_resource_loader.h"
-
-namespace flocking_geese {
-
-// Class that knows how to load and unpack a .png file into a buffer.  The
-// caller is expected to provide the memory for the final decompressed ARGB
-// pixel buffer.
-class PngLoader : public url_io::WebResourceLoader::Delegate {
- public:
-  PngLoader()
-      : content_length_(0),
-        url_bytes_read_(0),
-        is_valid_(false),
-        png_data_pos_(0),
-        png_ptr_(NULL),
-        png_info_ptr_(NULL) {}
-  ~PngLoader();
-
-  // WebResourceLoader::Delegate interface.
-  virtual void OnLoaderReceivedResponseInfo(url_io::WebResourceLoader* loader);
-  virtual void OnLoaderReceivedData(url_io::WebResourceLoader* loader);
-  virtual void OnLoaderCompletedDownload(url_io::WebResourceLoader* loader);
-  virtual void OnLoaderError(int32_t error, url_io::WebResourceLoader* loader);
-  virtual void OnLoaderDone(url_io::WebResourceLoader* loader);
-
-  // Fill in the given buffer with the decompressed image.  |pixel_buffer| is
-  // assumed to point to enough memory to hold all the pixel data.  If there
-  // isn't enough memory, there will be unpredictable results.
-  void FillPixelBuffer(uint32_t* pixel_buffer);
-
-  // Return |true| if the PNG data was sucessfully downloaded.
-  bool is_valid() const {
-    return is_valid_;
-  }
-
-  const uint8_t* png_data() const {
-    return png_data_.get();
-  }
-
-  // The size in pixels of the final, decompressed pixel buffer.
-  const pp::Size& png_image_size() const {
-    return png_image_size_;
-  }
-
- private:
-  // Support routines for using libpng.
-
-  // Wrapper function given to libpng.
-  friend void ReadDataFromInputStream(png_structp png_ptr,
-                                      png_bytep out_bytes,
-                                      png_size_t byte_count);
-
-  // Copy the next |byte_count| bytes from the PNG buffer into the supplied
-  // buffer.  This advances the internal stream pointer by |byte_count|.
-  // Returns the actual number of bytes read.  This method is passed into the
-  // libpng API.
-  size_t ReadPngData(uint8_t* buffer, const size_t byte_count);
-
-  // Premultiply all pixels in a scanline by their alpha.
-  void PreMultiplyAlpha(uint32_t* scanline, int32_t line_width) ;
-
-  // Delete all internal PNG sturctures and invlaidate this object.
-  void ReleaseAndInvalidate();
-
-  int32_t content_length_;  // The total content length.
-  int32_t url_bytes_read_;  // The number of bytes read so far.
-  bool is_valid_;
-  boost::scoped_array<uint8_t> png_data_;
-  size_t png_data_pos_;
-  png_structp png_ptr_;  // The main PNG structure maintained by libpng.
-  png_infop png_info_ptr_;
-  pp::Size png_image_size_;
-};
-
-}  // namespace flocking_geese
-
-#endif  // PNG_LOADER_H_