| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrPathRendering_DEFINED |
| #define GrPathRendering_DEFINED |
| |
| #include "SkPath.h" |
| |
| class SkStrokeRec; |
| class GrPath; |
| class GrPathRange; |
| class GrGpu; |
| |
| /** |
| * Abstract class wrapping HW path rendering API. |
| * |
| * The subclasses of this class use the possible HW API to render paths (as opposed to path |
| * rendering implemented in Skia on top of a "3d" HW API). |
| * The subclasses hold the global state needed to render paths, including shadow of the global HW |
| * API state. Similar to GrGpu. |
| * |
| * It is expected that the lifetimes of GrGpuXX and GrXXPathRendering are the same. The call context |
| * interface (eg. * the concrete instance of GrGpu subclass) should be provided to the instance |
| * during construction. |
| */ |
| class GrPathRendering { |
| public: |
| virtual ~GrPathRendering() { } |
| |
| enum PathTransformType { |
| kNone_PathTransformType, //!< [] |
| kTranslateX_PathTransformType, //!< [kMTransX] |
| kTranslateY_PathTransformType, //!< [kMTransY] |
| kTranslate_PathTransformType, //!< [kMTransX, kMTransY] |
| kAffine_PathTransformType, //!< [kMScaleX, kMSkewX, kMTransX, kMSkewY, kMScaleY, kMTransY] |
| |
| kLast_PathTransformType = kAffine_PathTransformType |
| }; |
| |
| static inline int PathTransformSize(PathTransformType type) { |
| switch (type) { |
| case kNone_PathTransformType: |
| return 0; |
| case kTranslateX_PathTransformType: |
| case kTranslateY_PathTransformType: |
| return 1; |
| case kTranslate_PathTransformType: |
| return 2; |
| case kAffine_PathTransformType: |
| return 6; |
| |
| default: |
| SkFAIL("Unknown path transform type"); |
| return 0; |
| } |
| } |
| |
| virtual GrPath* createPath(const SkPath&, const SkStrokeRec&) = 0; |
| virtual GrPathRange* createPathRange(size_t size, const SkStrokeRec&) = 0; |
| virtual void stencilPath(const GrPath*, SkPath::FillType) = 0; |
| virtual void drawPath(const GrPath*, SkPath::FillType) = 0; |
| virtual void drawPaths(const GrPathRange*, const uint32_t indices[], int count, |
| const float transforms[], PathTransformType, SkPath::FillType) = 0; |
| protected: |
| GrPathRendering() { } |
| |
| private: |
| GrPathRendering& operator=(const GrPathRendering&); |
| }; |
| |
| #endif |