texture.h

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// Copyright 2013 The Flutter 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 FLUTTER_LIB_GPU_TEXTURE_H_
#define FLUTTER_LIB_GPU_TEXTURE_H_
 
#include "flutter/lib/gpu/context.h"
#include "flutter/lib/gpu/export.h"
#include "flutter/lib/ui/dart_wrapper.h"
#include "impeller/core/formats.h"
#include "third_party/tonic/typed_data/dart_byte_data.h"
 
namespace flutter {
namespace gpu {
 
class Texture : public RefCountedDartWrappable<Texture> {
  DEFINE_WRAPPERTYPEINFO();
  FML_FRIEND_MAKE_REF_COUNTED(Texture);
 
 public:
  explicit Texture(std::shared_ptr<impeller::Texture> texture);
 
  ~Texture() override;
 
  std::shared_ptr<impeller::Texture> GetTexture();
 
  void SetCoordinateSystem(impeller::TextureCoordinateSystem coordinate_system);
 
  bool Overwrite(Context& gpu_context,
                 const tonic::DartByteData& source_bytes,
                 uint32_t mip_level,
                 uint32_t slice);
 
  size_t GetBytesPerTexel();
 
  Dart_Handle AsImage() const;
 
 private:
  std::shared_ptr<impeller::Texture> texture_;
 
  FML_DISALLOW_COPY_AND_ASSIGN(Texture);
};
 
}  // namespace gpu
}  // namespace flutter
 
//----------------------------------------------------------------------------
/// Exports
///
 
extern "C" {
 
FLUTTER_GPU_EXPORT
extern bool InternalFlutterGpu_Texture_Initialize(
    Dart_Handle wrapper,
    flutter::gpu::Context* gpu_context,
    int storage_mode,
    int format,
    int width,
    int height,
    int sample_count,
    int coordinate_system,
    int texture_type,
    bool enable_render_target_usage,
    bool enable_shader_read_usage,
    bool enable_shader_write_usage,
    int mip_level_count);
 
FLUTTER_GPU_EXPORT
extern void InternalFlutterGpu_Texture_SetCoordinateSystem(
    flutter::gpu::Texture* wrapper,
    int coordinate_system);
 
FLUTTER_GPU_EXPORT
extern bool InternalFlutterGpu_Texture_Overwrite(
    flutter::gpu::Texture* wrapper,
    flutter::gpu::Context* gpu_context,
    Dart_Handle source_byte_data,
    int mip_level,
    int slice);
 
FLUTTER_GPU_EXPORT
extern int InternalFlutterGpu_Texture_BytesPerTexel(
    flutter::gpu::Texture* wrapper);
 
FLUTTER_GPU_EXPORT
extern Dart_Handle InternalFlutterGpu_Texture_AsImage(
    flutter::gpu::Texture* wrapper);
 
}  // extern "C"
 
#endif  // FLUTTER_LIB_GPU_TEXTURE_H_