diff options
author | Stan Iliev <stani@google.com> | 2017-05-25 22:07:16 +0000 |
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committer | Skia Commit-Bot <skia-commit-bot@chromium.org> | 2017-05-25 22:30:19 +0000 |
commit | d8872be505c5c9c48072fe62c244e53e9b7334f1 (patch) | |
tree | ef6ae54d394f1bf0794393c42129811b93d0f6be /src/shaders/SkShaderBase.h | |
parent | 5b474d36238e38642add8d4b54cb9ac80935262b (diff) |
Revert "Relocate shaders to own dir"
This reverts commit fabe0b26d05624ce7374f6ca89bd66df6142534e.
Reason for revert: Last android roll failed with "external/skia/src/effects/SkGaussianEdgeShader.h:11:10: fatal error: 'SkShaderBase.h' file not found"
Original change's description:
> Relocate shaders to own dir
>
> Consolidate all shader impls under src/shaders/.
>
> Change-Id: I450e37541214704c1ad9e379d9d753b7cc62fac3
> Reviewed-on: https://skia-review.googlesource.com/17927
> Commit-Queue: Florin Malita <fmalita@chromium.org>
> Reviewed-by: Herb Derby <herb@google.com>
>
TBR=mtklein@google.com,herb@google.com,fmalita@chromium.org,reed@google.com
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: Idbb2b75053969df1dad9d8ce0217cd39189b9ddb
Reviewed-on: https://skia-review.googlesource.com/18020
Reviewed-by: Stan Iliev <stani@google.com>
Commit-Queue: Stan Iliev <stani@google.com>
Diffstat (limited to 'src/shaders/SkShaderBase.h')
-rw-r--r-- | src/shaders/SkShaderBase.h | 303 |
1 files changed, 0 insertions, 303 deletions
diff --git a/src/shaders/SkShaderBase.h b/src/shaders/SkShaderBase.h deleted file mode 100644 index 895fc6cf05..0000000000 --- a/src/shaders/SkShaderBase.h +++ /dev/null @@ -1,303 +0,0 @@ -/* - * Copyright 2017 Google Inc. - * - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -#ifndef SkShaderBase_DEFINED -#define SkShaderBase_DEFINED - -#include "SkFilterQuality.h" -#include "SkMatrix.h" -#include "SkShader.h" - -class GrContext; -class GrFragmentProcessor; -class SkArenaAlloc; -class SkColorSpace; -class SkColorSpaceXformer; -class SkImage; -struct SkImageInfo; -class SkPaint; -class SkRasterPipeline; - -class SkShaderBase : public SkShader { -public: - SkShaderBase(const SkMatrix* localMatrix = nullptr); - - ~SkShaderBase() override; - - /** - * Returns true if the shader is guaranteed to produce only a single color. - * Subclasses can override this to allow loop-hoisting optimization. - */ - virtual bool isConstant() const { return false; } - - const SkMatrix& getLocalMatrix() const { return fLocalMatrix; } - - enum Flags { - //!< set if all of the colors will be opaque - kOpaqueAlpha_Flag = 1 << 0, - - /** set if the spans only vary in X (const in Y). - e.g. an Nx1 bitmap that is being tiled in Y, or a linear-gradient - that varies from left-to-right. This flag specifies this for - shadeSpan(). - */ - kConstInY32_Flag = 1 << 1, - - /** hint for the blitter that 4f is the preferred shading mode. - */ - kPrefers4f_Flag = 1 << 2, - }; - - /** - * ContextRec acts as a parameter bundle for creating Contexts. - */ - struct ContextRec { - enum DstType { - kPMColor_DstType, // clients prefer shading into PMColor dest - kPM4f_DstType, // clients prefer shading into PM4f dest - }; - - ContextRec(const SkPaint& paint, const SkMatrix& matrix, const SkMatrix* localM, - DstType dstType, SkColorSpace* dstColorSpace) - : fPaint(&paint) - , fMatrix(&matrix) - , fLocalMatrix(localM) - , fPreferredDstType(dstType) - , fDstColorSpace(dstColorSpace) {} - - const SkPaint* fPaint; // the current paint associated with the draw - const SkMatrix* fMatrix; // the current matrix in the canvas - const SkMatrix* fLocalMatrix; // optional local matrix - const DstType fPreferredDstType; // the "natural" client dest type - SkColorSpace* fDstColorSpace; // the color space of the dest surface (if any) - }; - - class Context : public ::SkNoncopyable { - public: - Context(const SkShaderBase& shader, const ContextRec&); - - virtual ~Context(); - - /** - * Called sometimes before drawing with this shader. Return the type of - * alpha your shader will return. The default implementation returns 0. - * Your subclass should override if it can (even sometimes) report a - * non-zero value, since that will enable various blitters to perform - * faster. - */ - virtual uint32_t getFlags() const { return 0; } - - /** - * Called for each span of the object being drawn. Your subclass should - * set the appropriate colors (with premultiplied alpha) that correspond - * to the specified device coordinates. - */ - virtual void shadeSpan(int x, int y, SkPMColor[], int count) = 0; - - virtual void shadeSpan4f(int x, int y, SkPM4f[], int count); - - struct BlitState; - typedef void (*BlitBW)(BlitState*, - int x, int y, const SkPixmap&, int count); - typedef void (*BlitAA)(BlitState*, - int x, int y, const SkPixmap&, int count, const SkAlpha[]); - - struct BlitState { - // inputs - Context* fCtx; - SkBlendMode fMode; - - // outputs - enum { N = 2 }; - void* fStorage[N]; - BlitBW fBlitBW; - BlitAA fBlitAA; - }; - - // Returns true if one or more of the blitprocs are set in the BlitState - bool chooseBlitProcs(const SkImageInfo& info, BlitState* state) { - state->fBlitBW = nullptr; - state->fBlitAA = nullptr; - if (this->onChooseBlitProcs(info, state)) { - SkASSERT(state->fBlitBW || state->fBlitAA); - return true; - } - return false; - } - - /** - * The const void* ctx is only const because all the implementations are const. - * This can be changed to non-const if a new shade proc needs to change the ctx. - */ - typedef void (*ShadeProc)(const void* ctx, int x, int y, SkPMColor[], int count); - virtual ShadeProc asAShadeProc(void** ctx); - - /** - * Similar to shadeSpan, but only returns the alpha-channel for a span. - * The default implementation calls shadeSpan() and then extracts the alpha - * values from the returned colors. - */ - virtual void shadeSpanAlpha(int x, int y, uint8_t alpha[], int count); - - // Notification from blitter::blitMask in case we need to see the non-alpha channels - virtual void set3DMask(const SkMask*) {} - - protected: - // Reference to shader, so we don't have to dupe information. - const SkShaderBase& fShader; - - enum MatrixClass { - kLinear_MatrixClass, // no perspective - kFixedStepInX_MatrixClass, // fast perspective, need to call fixedStepInX() each - // scanline - kPerspective_MatrixClass // slow perspective, need to mappoints each pixel - }; - static MatrixClass ComputeMatrixClass(const SkMatrix&); - - uint8_t getPaintAlpha() const { return fPaintAlpha; } - const SkMatrix& getTotalInverse() const { return fTotalInverse; } - MatrixClass getInverseClass() const { return (MatrixClass)fTotalInverseClass; } - const SkMatrix& getCTM() const { return fCTM; } - - virtual bool onChooseBlitProcs(const SkImageInfo&, BlitState*) { return false; } - - private: - SkMatrix fCTM; - SkMatrix fTotalInverse; - uint8_t fPaintAlpha; - uint8_t fTotalInverseClass; - - typedef SkNoncopyable INHERITED; - }; - - /** - * Make a context using the memory provided by the arena. - * - * @return pointer to context or nullptr if can't be created - */ - Context* makeContext(const ContextRec&, SkArenaAlloc*) const; - -#if SK_SUPPORT_GPU - struct AsFPArgs { - AsFPArgs() {} - AsFPArgs(GrContext* context, - const SkMatrix* viewMatrix, - const SkMatrix* localMatrix, - SkFilterQuality filterQuality, - SkColorSpace* dstColorSpace) - : fContext(context) - , fViewMatrix(viewMatrix) - , fLocalMatrix(localMatrix) - , fFilterQuality(filterQuality) - , fDstColorSpace(dstColorSpace) {} - - GrContext* fContext; - const SkMatrix* fViewMatrix; - const SkMatrix* fLocalMatrix; - SkFilterQuality fFilterQuality; - SkColorSpace* fDstColorSpace; - }; - - /** - * Returns a GrFragmentProcessor that implements the shader for the GPU backend. NULL is - * returned if there is no GPU implementation. - * - * The GPU device does not call SkShader::createContext(), instead we pass the view matrix, - * local matrix, and filter quality directly. - * - * The GrContext may be used by the to create textures that are required by the returned - * processor. - * - * The returned GrFragmentProcessor should expect an unpremultiplied input color and - * produce a premultiplied output. - */ - virtual sk_sp<GrFragmentProcessor> asFragmentProcessor(const AsFPArgs&) const; -#endif - - /** - * If the shader can represent its "average" luminance in a single color, return true and - * if color is not NULL, return that color. If it cannot, return false and ignore the color - * parameter. - * - * Note: if this returns true, the returned color will always be opaque, as only the RGB - * components are used to compute luminance. - */ - bool asLuminanceColor(SkColor*) const; - - /** - * Returns a shader transformed into a new color space via the |xformer|. - */ - sk_sp<SkShader> makeColorSpace(SkColorSpaceXformer* xformer) const { - return this->onMakeColorSpace(xformer); - } - - virtual bool isRasterPipelineOnly() const { return false; } - - bool appendStages(SkRasterPipeline*, SkColorSpace* dstCS, SkArenaAlloc*, - const SkMatrix& ctm, const SkPaint&, const SkMatrix* localM=nullptr) const; - - bool computeTotalInverse(const SkMatrix& ctm, - const SkMatrix* outerLocalMatrix, - SkMatrix* totalInverse) const; - -#ifdef SK_SUPPORT_LEGACY_SHADER_ISABITMAP - virtual bool onIsABitmap(SkBitmap*, SkMatrix*, TileMode[2]) const { - return false; - } -#endif - - virtual SkImage* onIsAImage(SkMatrix*, TileMode[2]) const { - return nullptr; - } - - SK_TO_STRING_VIRT() - - SK_DEFINE_FLATTENABLE_TYPE(SkShaderBase) - SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() - -protected: - void flatten(SkWriteBuffer&) const override; - - /** - * Specialize creating a SkShader context using the supplied allocator. - * @return pointer to context owned by the arena allocator. - */ - virtual Context* onMakeContext(const ContextRec&, SkArenaAlloc*) const { - return nullptr; - } - - virtual bool onAsLuminanceColor(SkColor*) const { - return false; - } - - virtual sk_sp<SkShader> onMakeColorSpace(SkColorSpaceXformer*) const { - return sk_ref_sp(const_cast<SkShaderBase*>(this)); - } - - virtual bool onAppendStages(SkRasterPipeline*, SkColorSpace* dstCS, SkArenaAlloc*, - const SkMatrix&, const SkPaint&, const SkMatrix* localM) const; - -private: - // This is essentially const, but not officially so it can be modified in constructors. - SkMatrix fLocalMatrix; - - typedef SkShader INHERITED; -}; - -inline SkShaderBase* as_SB(SkShader* shader) { - return static_cast<SkShaderBase*>(shader); -} - -inline const SkShaderBase* as_SB(const SkShader* shader) { - return static_cast<const SkShaderBase*>(shader); -} - -inline const SkShaderBase* as_SB(const sk_sp<SkShader>& shader) { - return static_cast<SkShaderBase*>(shader.get()); -} - -#endif // SkShaderBase_DEFINED |