| /* |
| * Copyright 2020 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrDynamicAtlas_DEFINED |
| #define GrDynamicAtlas_DEFINED |
| |
| #include "src/base/SkArenaAlloc.h" |
| #include "src/gpu/ganesh/GrTextureProxy.h" |
| |
| class GrOnFlushResourceProvider; |
| class GrResourceProvider; |
| class GrSurfaceProxyView; |
| struct SkIPoint16; |
| struct SkIRect; |
| |
| /** |
| * This class implements a dynamic size skgpu::Rectanizer that grows until it reaches the |
| * implementation-dependent max texture size. When finalized, it also creates and stores a |
| * GrTextureProxy for the underlying atlas. |
| */ |
| class GrDynamicAtlas { |
| public: |
| // As long as GrSurfaceOrigin exists, we just have to decide on one for the atlas texture. |
| inline static constexpr GrSurfaceOrigin kTextureOrigin = kTopLeft_GrSurfaceOrigin; |
| inline static constexpr int kPadding = 1; // Amount of padding below and to the right of each |
| // path. |
| |
| using LazyAtlasDesc = GrSurfaceProxy::LazySurfaceDesc; |
| using LazyInstantiateAtlasCallback = GrSurfaceProxy::LazyInstantiateCallback; |
| |
| enum class InternalMultisample : bool { |
| kNo = false, |
| kYes = true |
| }; |
| |
| static sk_sp<GrTextureProxy> MakeLazyAtlasProxy(LazyInstantiateAtlasCallback&&, |
| GrColorType colorType, |
| InternalMultisample, |
| const GrCaps&, |
| GrSurfaceProxy::UseAllocator); |
| |
| enum class RectanizerAlgorithm { |
| kSkyline, |
| kPow2 |
| }; |
| |
| GrDynamicAtlas(GrColorType colorType, InternalMultisample, SkISize initialSize, |
| int maxAtlasSize, const GrCaps&, |
| RectanizerAlgorithm = RectanizerAlgorithm::kSkyline); |
| virtual ~GrDynamicAtlas(); |
| |
| void reset(SkISize initialSize, const GrCaps& desc); |
| |
| GrColorType colorType() const { return fColorType; } |
| int maxAtlasSize() const { return fMaxAtlasSize; } |
| GrTextureProxy* textureProxy() const { return fTextureProxy.get(); } |
| GrSurfaceProxyView readView(const GrCaps&) const; |
| GrSurfaceProxyView writeView(const GrCaps&) const; |
| bool isInstantiated() const { return fTextureProxy->isInstantiated(); } |
| |
| // Attempts to add a rect to the atlas. Returns true if successful, along with the rect's |
| // top-left location in the atlas. |
| bool addRect(int width, int height, SkIPoint16* location); |
| const SkISize& drawBounds() { return fDrawBounds; } |
| |
| // Instantiates our texture proxy for the atlas. After this call, it is no longer valid to call |
| // addRect(), setUserBatchID(), or this method again. |
| // |
| // 'backingTexture', if provided, is a renderable texture with which to instantiate our proxy. |
| // If null then we will create a texture using the resource provider. The purpose of this param |
| // is to provide a guaranteed way to recycle textures from previous atlases. |
| [[nodiscard]] bool instantiate(GrOnFlushResourceProvider*, |
| sk_sp<GrTexture> backingTexture = nullptr); |
| |
| private: |
| class Node; |
| |
| Node* makeNode(Node* previous, int l, int t, int r, int b); |
| bool internalPlaceRect(int w, int h, SkIPoint16* loc); |
| |
| const GrColorType fColorType; |
| const InternalMultisample fInternalMultisample; |
| const int fMaxAtlasSize; |
| const RectanizerAlgorithm fRectanizerAlgorithm; |
| int fWidth; |
| int fHeight; |
| SkISize fDrawBounds; |
| |
| SkSTArenaAllocWithReset<512> fNodeAllocator; |
| Node* fTopNode = nullptr; |
| |
| sk_sp<GrTextureProxy> fTextureProxy; |
| sk_sp<GrTexture> fBackingTexture; |
| }; |
| |
| #endif |