| // 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_ENTITY_CONTENTS_TILED_TEXTURE_CONTENTS_H_ |
| #define FLUTTER_IMPELLER_ENTITY_CONTENTS_TILED_TEXTURE_CONTENTS_H_ |
| |
| #include <functional> |
| #include <memory> |
| #include <vector> |
| |
| #include "flutter/fml/macros.h" |
| #include "impeller/core/sampler_descriptor.h" |
| #include "impeller/entity/contents/color_source_contents.h" |
| #include "impeller/entity/contents/filters/color_filter_contents.h" |
| #include "impeller/entity/entity.h" |
| #include "impeller/geometry/path.h" |
| #include "impeller/renderer/capabilities.h" |
| |
| namespace impeller { |
| |
| class TiledTextureContents final : public ColorSourceContents { |
| public: |
| TiledTextureContents(); |
| |
| ~TiledTextureContents() override; |
| |
| using ColorFilterProc = |
| std::function<std::shared_ptr<ColorFilterContents>(FilterInput::Ref)>; |
| |
| // |Contents| |
| bool IsOpaque() const override; |
| |
| // |Contents| |
| bool Render(const ContentContext& renderer, |
| const Entity& entity, |
| RenderPass& pass) const override; |
| |
| void SetTexture(std::shared_ptr<Texture> texture); |
| |
| void SetTileModes(Entity::TileMode x_tile_mode, Entity::TileMode y_tile_mode); |
| |
| void SetSamplerDescriptor(SamplerDescriptor desc); |
| |
| /// @brief Set a color filter to apply directly to this tiled texture |
| /// @param color_filter |
| /// |
| /// When applying a color filter to a tiled texture, we can reduce the |
| /// size and number of the subpasses required and the shader workload by |
| /// applying the filter to the untiled image and absorbing the opacity before |
| /// tiling it into the final location. |
| /// |
| /// This may not be a performance improvement if the image is tiled into a |
| /// much smaller size that its original texture size. |
| void SetColorFilter(ColorFilterProc color_filter); |
| |
| // |Contents| |
| std::optional<Snapshot> RenderToSnapshot( |
| const ContentContext& renderer, |
| const Entity& entity, |
| std::optional<Rect> coverage_limit = std::nullopt, |
| const std::optional<SamplerDescriptor>& sampler_descriptor = std::nullopt, |
| bool msaa_enabled = true, |
| int32_t mip_count = 1, |
| const std::string& label = "Tiled Texture Snapshot") const override; |
| |
| private: |
| std::shared_ptr<Texture> CreateFilterTexture( |
| const ContentContext& renderer) const; |
| |
| SamplerDescriptor CreateSamplerDescriptor( |
| const Capabilities& capabilities) const; |
| |
| bool UsesEmulatedTileMode(const Capabilities& capabilities) const; |
| |
| std::shared_ptr<Texture> texture_; |
| SamplerDescriptor sampler_descriptor_ = {}; |
| Entity::TileMode x_tile_mode_ = Entity::TileMode::kClamp; |
| Entity::TileMode y_tile_mode_ = Entity::TileMode::kClamp; |
| ColorFilterProc color_filter_ = nullptr; |
| |
| TiledTextureContents(const TiledTextureContents&) = delete; |
| |
| TiledTextureContents& operator=(const TiledTextureContents&) = delete; |
| }; |
| |
| } // namespace impeller |
| |
| #endif // FLUTTER_IMPELLER_ENTITY_CONTENTS_TILED_TEXTURE_CONTENTS_H_ |