ioJPG.hpp

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/*  Visualization Library                                                             */
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#if !defined(ioJPG_INCLUDE_ONCE)
#define ioJPG_INCLUDE_ONCE

#include <vlCore/Object.hpp>
#include <vlCore/ResourceLoadWriter.hpp>
#include <vlCore/ResourceDatabase.hpp>
#include <vlCore/Image.hpp>

namespace vl
{
  class VirtualFile;
  class String;
  class Image;

  VLCORE_EXPORT ref<Image> loadJPG(VirtualFile* file);
  VLCORE_EXPORT ref<Image> loadJPG(const String& path);
  VLCORE_EXPORT bool isJPG(VirtualFile* file);
  VLCORE_EXPORT bool saveJPG(const Image* src, const String& path, int quality = 95);
  VLCORE_EXPORT bool saveJPG(const Image* src, VirtualFile* file, int quality = 95);

  //---------------------------------------------------------------------------
  // LoadWriterJPG
  //---------------------------------------------------------------------------
  class LoadWriterJPG: public ResourceLoadWriter
  {
    VL_INSTRUMENT_CLASS(vl::LoadWriterJPG, ResourceLoadWriter)

  public:
    LoadWriterJPG(): ResourceLoadWriter("|jpg|", "|jpg|"), mQuality(95)
    {
      VL_DEBUG_SET_OBJECT_NAME()
    }

    ref<ResourceDatabase> loadResource(const String& path) const
    {
      ref<ResourceDatabase> res_db = new ResourceDatabase;
      ref<Image> img = loadJPG(path);
      if (img)
        res_db->resources().push_back(img);
      return res_db;
    }

    ref<ResourceDatabase> loadResource(VirtualFile* file) const
    {
      ref<ResourceDatabase> res_db = new ResourceDatabase;
      ref<Image> img = loadJPG(file);
      if (img)
        res_db->resources().push_back(img);
      return res_db;
    }

    bool writeResource(const String& path, ResourceDatabase* resource) const
    {
      bool ok = true;
      for(unsigned i=0; i<resource->count<Image>(); ++i)
        ok &= saveJPG(resource->get<Image>(i), path, quality());
      return ok;
    }

    bool writeResource(VirtualFile* file, ResourceDatabase* resource) const
    {
      bool ok = true;
      for(unsigned i=0; i<resource->count<Image>(); ++i)
        ok &= saveJPG(resource->get<Image>(i), file, quality());
      return ok;
    }

    int quality() const { return mQuality; }
    void setQuality(int quality) { mQuality = quality; }

  protected:
    int mQuality;
  };
}

#endif