| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrSWMaskHelper_DEFINED |
| #define GrSWMaskHelper_DEFINED |
| |
| #include "include/core/SkMatrix.h" |
| #include "include/core/SkRegion.h" |
| #include "include/core/SkTypes.h" |
| #include "include/private/GrTypesPriv.h" |
| #include "src/core/SkAutoPixmapStorage.h" |
| #include "src/core/SkDraw.h" |
| #include "src/core/SkRasterClip.h" |
| |
| class GrShape; |
| class GrRecordingContext; |
| class GrTextureProxy; |
| |
| /** |
| * The GrSWMaskHelper helps generate clip masks using the software rendering |
| * path. It is intended to be used as: |
| * |
| * GrSWMaskHelper helper(context); |
| * helper.init(...); |
| * |
| * draw one or more paths/rects specifying the required boolean ops |
| * |
| * toTextureProxy(); // to get it from the internal bitmap to the GPU |
| * |
| * The result of this process will be the final mask (on the GPU) in the |
| * upper left hand corner of the texture. |
| */ |
| class GrSWMaskHelper : SkNoncopyable { |
| public: |
| GrSWMaskHelper(SkAutoPixmapStorage* pixels = nullptr) |
| : fPixels(pixels ? pixels : &fPixelsStorage) { } |
| |
| // set up the internal state in preparation for draws. Since many masks |
| // may be accumulated in the helper during creation, "resultBounds" |
| // allows the caller to specify the region of interest - to limit the |
| // amount of work. |
| bool init(const SkIRect& resultBounds); |
| |
| // Draw a single rect into the accumulation bitmap using the specified op |
| void drawRect(const SkRect& rect, const SkMatrix& matrix, SkRegion::Op op, GrAA, uint8_t alpha); |
| |
| // Draw a single path into the accumuation bitmap using the specified op |
| void drawShape(const GrShape&, const SkMatrix& matrix, SkRegion::Op op, GrAA, uint8_t alpha); |
| |
| sk_sp<GrTextureProxy> toTextureProxy(GrRecordingContext*, SkBackingFit fit); |
| |
| // Reset the internal bitmap |
| void clear(uint8_t alpha) { |
| fPixels->erase(SkColorSetARGB(alpha, 0xFF, 0xFF, 0xFF)); |
| } |
| |
| private: |
| SkVector fTranslate; |
| SkAutoPixmapStorage* fPixels; |
| SkAutoPixmapStorage fPixelsStorage; |
| SkDraw fDraw; |
| SkRasterClip fRasterClip; |
| |
| typedef SkNoncopyable INHERITED; |
| }; |
| |
| #endif // GrSWMaskHelper_DEFINED |