pipeline_gles.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_IMPELLER_RENDERER_BACKEND_GLES_PIPELINE_GLES_H_
#define FLUTTER_IMPELLER_RENDERER_BACKEND_GLES_PIPELINE_GLES_H_
 
#include "impeller/base/backend_cast.h"
#include "impeller/renderer/backend/gles/buffer_bindings_gles.h"
#include "impeller/renderer/backend/gles/reactor_gles.h"
#include "impeller/renderer/backend/gles/unique_handle_gles.h"
#include "impeller/renderer/pipeline.h"
 
namespace impeller {
 
class PipelineLibraryGLES;
 
namespace testing {
class RenderPassGLESCommandTest;
}  // namespace testing
 
class PipelineGLES final
    : public Pipeline<PipelineDescriptor>,
      public BackendCast<PipelineGLES, Pipeline<PipelineDescriptor>> {
 public:
  // |Pipeline|
  ~PipelineGLES() override;
 
  const HandleGLES& GetProgramHandle() const;
 
  const std::shared_ptr<UniqueHandleGLES> GetSharedHandle() const;
 
  [[nodiscard]] bool BindProgram() const;
 
  [[nodiscard]] bool UnbindProgram() const;
 
  BufferBindingsGLES* GetBufferBindings() const;
 
  [[nodiscard]] bool BuildVertexDescriptor(const ProcTableGLES& gl,
                                           GLuint program);
 
  // GL location of the `_impeller_y_flip` uniform (flutter/flutter#186554),
  // cached at link time. -1 if the shader doesn't declare it.
  GLint GetYFlipUniformLocation() const { return y_flip_uniform_location_; }
 
 private:
  friend PipelineLibraryGLES;
  friend class testing::RenderPassGLESCommandTest;
 
  std::shared_ptr<ReactorGLES> reactor_;
  std::shared_ptr<UniqueHandleGLES> handle_;
  std::unique_ptr<BufferBindingsGLES> buffer_bindings_;
  GLint y_flip_uniform_location_ = -1;
  bool is_valid_ = false;
 
  // |Pipeline|
  bool IsValid() const override;
 
  PipelineGLES(std::shared_ptr<ReactorGLES> reactor,
               std::weak_ptr<PipelineLibrary> library,
               const PipelineDescriptor& desc,
               std::shared_ptr<UniqueHandleGLES> handle);
 
  PipelineGLES(const PipelineGLES&) = delete;
 
  PipelineGLES& operator=(const PipelineGLES&) = delete;
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_RENDERER_BACKEND_GLES_PIPELINE_GLES_H_