| // Copyright 2018 The Fuchsia 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 LIB_ESCHER_IMPL_GAUSSIAN_3X3F_H_ |
| #define LIB_ESCHER_IMPL_GAUSSIAN_3X3F_H_ |
| |
| #include <memory> |
| #include "lib/escher/forward_declarations.h" |
| #include "lib/escher/impl/compute_shader.h" |
| #include "lib/fxl/macros.h" |
| #include "vulkan/vulkan.hpp" |
| |
| namespace escher { |
| namespace impl { |
| |
| // A helper class that wraps up a compute shader for Gaussian blur on images |
| // with vk::Format::eR32G32B32A32Sfloat. |
| // TODO(SCN-619): Investigate the performance issue. |
| class Gaussian3x3f { |
| public: |
| explicit Gaussian3x3f(EscherWeakPtr escher); |
| |
| // Apply two-pass gaussian on the input texture, and render into the output |
| // texture. Mipmap is not supported. Assumes the image layout is |
| // vk::ImageLayout::eGeneral. |
| void Apply(CommandBuffer* command_buffer, const TexturePtr& input, |
| const TexturePtr& output); |
| |
| private: |
| EscherWeakPtr escher_; |
| std::unique_ptr<ComputeShader> kernel_; |
| |
| FXL_DISALLOW_COPY_AND_ASSIGN(Gaussian3x3f); |
| }; |
| |
| } // namespace impl |
| } // namespace escher |
| |
| #endif // LIB_ESCHER_IMPL_GAUSSIAN_3X3F_H_ |