| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrResourceProvider_DEFINED |
| #define GrResourceProvider_DEFINED |
| |
| #include "GrBuffer.h" |
| #include "GrPathRange.h" |
| #include "GrResourceCache.h" |
| #include "SkImageInfo.h" |
| #include "SkScalerContext.h" |
| |
| class GrBackendRenderTarget; |
| class GrBackendSemaphore; |
| class GrBackendTexture; |
| class GrGpu; |
| class GrPath; |
| class GrRenderTarget; |
| class GrResourceProviderPriv; |
| class GrSemaphore; |
| class GrSingleOwner; |
| class GrStencilAttachment; |
| class GrTexture; |
| |
| class GrStyle; |
| class SkDescriptor; |
| class SkPath; |
| class SkTypeface; |
| |
| /** |
| * A factory for arbitrary resource types. This class is intended for use within the Gr code base. |
| * |
| * Some members force callers to make a flags (pendingIO) decision. This can be relaxed once |
| * https://bug.skia.org/4156 is fixed. |
| */ |
| class GrResourceProvider { |
| public: |
| GrResourceProvider(GrGpu* gpu, GrResourceCache* cache, GrSingleOwner* owner); |
| |
| /** |
| * Finds a resource in the cache, based on the specified key. Prior to calling this, the caller |
| * must be sure that if a resource of exists in the cache with the given unique key then it is |
| * of type T. |
| */ |
| template <typename T> |
| sk_sp<T> findByUniqueKey(const GrUniqueKey& key) { |
| return sk_sp<T>(static_cast<T*>(this->findResourceByUniqueKey(key).release())); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Textures |
| |
| /** |
| * Finds a texture that approximately matches the descriptor. Will be at least as large in width |
| * and height as desc specifies. If desc specifies that the texture should be a render target |
| * then result will be a render target. Format and sample count will always match the request. |
| * The contents of the texture are undefined. |
| */ |
| sk_sp<GrTexture> createApproxTexture(const GrSurfaceDesc&, uint32_t flags); |
| |
| /** Create an exact fit texture with no initial data to upload. |
| */ |
| sk_sp<GrTexture> createTexture(const GrSurfaceDesc&, SkBudgeted, uint32_t flags = 0); |
| |
| sk_sp<GrTexture> createTexture(const GrSurfaceDesc&, SkBudgeted, |
| const GrMipLevel texels[], int mipLevelCount, |
| SkDestinationSurfaceColorMode mipColorMode); |
| |
| // Create a potentially loose fit texture with the provided data |
| sk_sp<GrTexture> createTexture(const GrSurfaceDesc&, SkBudgeted, const GrMipLevel&); |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Wrapped Backend Surfaces |
| |
| /** |
| * Wraps an existing texture with a GrTexture object. |
| * |
| * OpenGL: if the object is a texture Gr may change its GL texture params |
| * when it is drawn. |
| * |
| * @return GrTexture object or NULL on failure. |
| */ |
| sk_sp<GrTexture> wrapBackendTexture(const GrBackendTexture& tex, |
| GrWrapOwnership = kBorrow_GrWrapOwnership); |
| |
| /** |
| * This makes the backend texture be renderable. If sampleCnt is > 1 and the underlying API |
| * uses separate MSAA render buffers then a MSAA render buffer is created that resolves |
| * to the texture. |
| */ |
| sk_sp<GrTexture> wrapRenderableBackendTexture(const GrBackendTexture& tex, |
| int sampleCnt, |
| GrWrapOwnership = kBorrow_GrWrapOwnership); |
| |
| /** |
| * Wraps an existing render target with a GrRenderTarget object. It is |
| * similar to wrapBackendTexture but can be used to draw into surfaces |
| * that are not also textures (e.g. FBO 0 in OpenGL, or an MSAA buffer that |
| * the client will resolve to a texture). Currently wrapped render targets |
| * always use the kBorrow_GrWrapOwnership semantics. |
| * |
| * @return GrRenderTarget object or NULL on failure. |
| */ |
| sk_sp<GrRenderTarget> wrapBackendRenderTarget(const GrBackendRenderTarget&); |
| |
| static const uint32_t kMinScratchTextureSize; |
| |
| /** |
| * Either finds and refs, or creates a static buffer with the given parameters and contents. |
| * |
| * @param intendedType hint to the graphics subsystem about what the buffer will be used for. |
| * @param size minimum size of buffer to return. |
| * @param data optional data with which to initialize the buffer. |
| * @param key Key to be assigned to the buffer. |
| * |
| * @return The buffer if successful, otherwise nullptr. |
| */ |
| sk_sp<const GrBuffer> findOrMakeStaticBuffer(GrBufferType intendedType, size_t size, |
| const void* data, const GrUniqueKey& key); |
| |
| /** |
| * Either finds and refs, or creates an index buffer with a repeating pattern for drawing |
| * contiguous vertices of a repeated mesh. If the return is non-null, the caller owns a ref on |
| * the returned GrBuffer. |
| * |
| * @param pattern the pattern of indices to repeat |
| * @param patternSize size in bytes of the pattern |
| * @param reps number of times to repeat the pattern |
| * @param vertCount number of vertices the pattern references |
| * @param key Key to be assigned to the index buffer. |
| * |
| * @return The index buffer if successful, otherwise nullptr. |
| */ |
| sk_sp<const GrBuffer> findOrCreatePatternedIndexBuffer(const uint16_t* pattern, |
| int patternSize, |
| int reps, |
| int vertCount, |
| const GrUniqueKey& key) { |
| if (auto buffer = this->findByUniqueKey<GrBuffer>(key)) { |
| return buffer; |
| } |
| return this->createPatternedIndexBuffer(pattern, patternSize, reps, vertCount, key); |
| } |
| |
| /** |
| * Returns an index buffer that can be used to render quads. |
| * Six indices per quad: 0, 1, 2, 2, 1, 3, etc. |
| * The max number of quads is the buffer's index capacity divided by 6. |
| * Draw with GrPrimitiveType::kTriangles |
| * @ return the quad index buffer |
| */ |
| sk_sp<const GrBuffer> refQuadIndexBuffer() { |
| if (auto buffer = this->findByUniqueKey<const GrBuffer>(fQuadIndexBufferKey)) { |
| return buffer; |
| } |
| return this->createQuadIndexBuffer(); |
| } |
| |
| static int QuadCountOfQuadBuffer(); |
| |
| /** |
| * Factories for GrPath and GrPathRange objects. It's an error to call these if path rendering |
| * is not supported. |
| */ |
| sk_sp<GrPath> createPath(const SkPath&, const GrStyle&); |
| sk_sp<GrPathRange> createPathRange(GrPathRange::PathGenerator*, const GrStyle&); |
| sk_sp<GrPathRange> createGlyphs(const SkTypeface*, const SkScalerContextEffects&, |
| const SkDescriptor*, const GrStyle&); |
| |
| /** These flags govern which scratch resources we are allowed to return */ |
| enum Flags { |
| /** If the caller intends to do direct reads/writes to/from the CPU then this flag must be |
| * set when accessing resources during a GrOpList flush. This includes the execution of |
| * GrOp objects. The reason is that these memory operations are done immediately and |
| * will occur out of order WRT the operations being flushed. |
| * Make this automatic: https://bug.skia.org/4156 |
| */ |
| kNoPendingIO_Flag = 0x1, |
| |
| /** Normally the caps may indicate a preference for client-side buffers. Set this flag when |
| * creating a buffer to guarantee it resides in GPU memory. |
| */ |
| kRequireGpuMemory_Flag = 0x2, |
| }; |
| |
| /** |
| * Returns a buffer. |
| * |
| * @param size minimum size of buffer to return. |
| * @param intendedType hint to the graphics subsystem about what the buffer will be used for. |
| * @param GrAccessPattern hint to the graphics subsystem about how the data will be accessed. |
| * @param flags see Flags enum. |
| * @param data optional data with which to initialize the buffer. |
| * |
| * @return the buffer if successful, otherwise nullptr. |
| */ |
| GrBuffer* createBuffer(size_t size, GrBufferType intendedType, GrAccessPattern, uint32_t flags, |
| const void* data = nullptr); |
| |
| |
| /** |
| * If passed in render target already has a stencil buffer, return true. Otherwise attempt to |
| * attach one and return true on success. |
| */ |
| bool attachStencilAttachment(GrRenderTarget* rt); |
| |
| /** |
| * Wraps an existing texture with a GrRenderTarget object. This is useful when the provided |
| * texture has a format that cannot be textured from by Skia, but we want to raster to it. |
| * |
| * The texture is wrapped as borrowed. The texture object will not be freed once the |
| * render target is destroyed. |
| * |
| * @return GrRenderTarget object or NULL on failure. |
| */ |
| sk_sp<GrRenderTarget> wrapBackendTextureAsRenderTarget(const GrBackendTexture&, |
| int sampleCnt); |
| |
| /** |
| * Assigns a unique key to a resource. If the key is associated with another resource that |
| * association is removed and replaced by this resource. |
| */ |
| void assignUniqueKeyToResource(const GrUniqueKey&, GrGpuResource*); |
| |
| sk_sp<GrSemaphore> SK_WARN_UNUSED_RESULT makeSemaphore(bool isOwned = true); |
| |
| enum class SemaphoreWrapType { |
| kWillSignal, |
| kWillWait, |
| }; |
| |
| sk_sp<GrSemaphore> wrapBackendSemaphore(const GrBackendSemaphore&, |
| SemaphoreWrapType wrapType, |
| GrWrapOwnership = kBorrow_GrWrapOwnership); |
| |
| // Takes the GrSemaphore and sets the ownership of the semaphore to the GrGpu object used by |
| // this class. This call is only used when passing a GrSemaphore from one context to another. |
| void takeOwnershipOfSemaphore(sk_sp<GrSemaphore>); |
| // Takes the GrSemaphore and resets the ownership of the semaphore so that it is not owned by |
| // any GrGpu. A follow up call to takeOwnershipofSemaphore must be made so that the underlying |
| // semaphore can be deleted. This call is only used when passing a GrSemaphore from one context |
| // to another. |
| void releaseOwnershipOfSemaphore(sk_sp<GrSemaphore>); |
| |
| void abandon() { |
| fCache = nullptr; |
| fGpu = nullptr; |
| } |
| |
| const GrCaps* caps() const { return fCaps.get(); } |
| bool overBudget() const { return fCache->overBudget(); } |
| |
| inline GrResourceProviderPriv priv(); |
| inline const GrResourceProviderPriv priv() const; |
| |
| private: |
| sk_sp<GrGpuResource> findResourceByUniqueKey(const GrUniqueKey&); |
| |
| // Attempts to find a resource in the cache that exactly matches the GrSurfaceDesc. Failing that |
| // it returns null. If non-null, the resulting texture is always budgeted. |
| sk_sp<GrTexture> refScratchTexture(const GrSurfaceDesc&, uint32_t scratchTextureFlags); |
| |
| /* |
| * Try to find an existing scratch texture that exactly matches 'desc'. If successful |
| * update the budgeting accordingly. |
| */ |
| sk_sp<GrTexture> getExactScratch(const GrSurfaceDesc&, SkBudgeted, uint32_t flags); |
| |
| GrResourceCache* cache() { return fCache; } |
| const GrResourceCache* cache() const { return fCache; } |
| |
| friend class GrResourceProviderPriv; |
| |
| // Method made available via GrResourceProviderPriv |
| GrGpu* gpu() { return fGpu; } |
| const GrGpu* gpu() const { return fGpu; } |
| |
| bool isAbandoned() const { |
| SkASSERT(SkToBool(fGpu) == SkToBool(fCache)); |
| return !SkToBool(fCache); |
| } |
| |
| sk_sp<const GrBuffer> createPatternedIndexBuffer(const uint16_t* pattern, |
| int patternSize, |
| int reps, |
| int vertCount, |
| const GrUniqueKey& key); |
| |
| sk_sp<const GrBuffer> createQuadIndexBuffer(); |
| |
| GrResourceCache* fCache; |
| GrGpu* fGpu; |
| sk_sp<const GrCaps> fCaps; |
| GrUniqueKey fQuadIndexBufferKey; |
| |
| // In debug builds we guard against improper thread handling |
| SkDEBUGCODE(mutable GrSingleOwner* fSingleOwner;) |
| }; |
| |
| #endif |