IRenderTarget.h

// Copyright @ MyScript. All rights reserved.
 
#pragma once
 
#include <memory>
 
namespace myscript {
namespace iink {
 
namespace graphics {
class ICanvas;
}
 
class Renderer;
 
enum LayerType
{
  MODEL         = 1 << 0,         
  CAPTURE       = 1 << 1,         
  LayerType_ALL = (1 << 2) - 1,   
};
 
class IRenderTarget
{
public:
  virtual ~IRenderTarget() = default;
 
  virtual void invalidate(std::shared_ptr<Renderer> renderer, std::underlying_type<LayerType>::type layers) = 0;
 
  virtual void invalidate(std::shared_ptr<Renderer> renderer, int x, int y, int width, int height, std::underlying_type<LayerType>::type layers) = 0;
 
  virtual bool supportsOffscreenRendering() { return false; }
 
  virtual float getPixelDensity() { return 1.0f; }
 
  virtual uint32_t createOffscreenRenderSurface(int width, int height, bool alphaMask) { return (uint32_t)-1; };
 
  virtual void releaseOffscreenRenderSurface(uint32_t surfaceId) {}
 
  virtual std::shared_ptr<graphics::ICanvas> createOffscreenRenderCanvas(uint32_t surfaceId) { return nullptr; }
 
  virtual void releaseOffscreenRenderCanvas(graphics::ICanvas* canvas) {}
};
 
}
}