reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef SkDraw_DEFINED |
| 18 | #define SkDraw_DEFINED |
| 19 | |
| 20 | #include "SkBitmap.h" |
| 21 | #include "SkCanvas.h" |
| 22 | #include "SkMask.h" |
| 23 | #include "SkMatrix.h" |
| 24 | #include "SkPaint.h" |
| 25 | #include "SkRect.h" |
| 26 | #include "SkAutoKern.h" |
| 27 | |
| 28 | class SkBounder; |
| 29 | class SkDevice; |
| 30 | class SkPath; |
| 31 | class SkRegion; |
| 32 | struct SkDrawProcs; |
| 33 | |
| 34 | class SkDraw { |
| 35 | public: |
| 36 | SkDraw() : fDevice(NULL), fBounder(NULL), fProcs(NULL) {} |
| 37 | SkDraw(const SkDraw& src); |
| 38 | |
| 39 | void drawPaint(const SkPaint&) const; |
| 40 | void drawPoints(SkCanvas::PointMode, size_t count, const SkPoint[], |
| 41 | const SkPaint&) const; |
| 42 | void drawRect(const SkRect&, const SkPaint&) const; |
| 43 | /* To save on mallocs, we allow a flag that tells us that srcPath is |
| 44 | mutable, so that we don't have to make copies of it as we transform it. |
| 45 | */ |
| 46 | void drawPath(const SkPath& srcPath, const SkPaint&, |
| 47 | const SkMatrix* prePathMatrix, bool pathIsMutable) const; |
| 48 | void drawBitmap(const SkBitmap&, const SkMatrix&, const SkPaint&) const; |
| 49 | void drawSprite(const SkBitmap&, int x, int y, const SkPaint&) const; |
| 50 | void drawText(const char text[], size_t byteLength, SkScalar x, |
| 51 | SkScalar y, const SkPaint& paint) const; |
| 52 | void drawPosText(const char text[], size_t byteLength, |
| 53 | const SkScalar pos[], SkScalar constY, |
| 54 | int scalarsPerPosition, const SkPaint& paint) const; |
| 55 | void drawTextOnPath(const char text[], size_t byteLength, |
| 56 | const SkPath&, const SkMatrix*, const SkPaint&) const; |
| 57 | void drawVertices(SkCanvas::VertexMode mode, int count, |
| 58 | const SkPoint vertices[], const SkPoint textures[], |
| 59 | const SkColor colors[], SkXfermode* xmode, |
| 60 | const uint16_t indices[], int ptCount, |
| 61 | const SkPaint& paint) const; |
| 62 | |
| 63 | void drawPath(const SkPath& src, const SkPaint& paint) const { |
| 64 | this->drawPath(src, paint, NULL, false); |
| 65 | } |
| 66 | |
| 67 | /** Helper function that creates a mask from a path and an optional maskfilter. |
| 68 | Note however, that the resulting mask will not have been actually filtered, |
| 69 | that must be done afterwards (by calling filterMask). The maskfilter is provided |
| 70 | solely to assist in computing the mask's bounds (if the mode requests that). |
| 71 | */ |
| 72 | static bool DrawToMask(const SkPath& devPath, const SkIRect* clipBounds, |
| 73 | SkMaskFilter* filter, const SkMatrix* filterMatrix, |
| 74 | SkMask* mask, SkMask::CreateMode mode); |
| 75 | |
| 76 | private: |
| 77 | void drawText_asPaths(const char text[], size_t byteLength, |
| 78 | SkScalar x, SkScalar y, const SkPaint&) const; |
| 79 | void drawDevMask(const SkMask& mask, const SkPaint&) const; |
| 80 | void drawBitmapAsMask(const SkBitmap&, const SkPaint&) const; |
| 81 | |
| 82 | public: |
| 83 | const SkBitmap* fBitmap; // required |
| 84 | const SkMatrix* fMatrix; // required |
| 85 | const SkRegion* fClip; // required |
| 86 | SkDevice* fDevice; // optional |
| 87 | SkBounder* fBounder; // optional |
| 88 | SkDrawProcs* fProcs; // optional |
| 89 | |
| 90 | #ifdef SK_DEBUG |
| 91 | void validate() const; |
| 92 | #endif |
| 93 | }; |
| 94 | |
| 95 | #include "SkGlyphCache.h" |
| 96 | |
| 97 | class SkTextToPathIter { |
| 98 | public: |
| 99 | SkTextToPathIter(const char text[], size_t length, const SkPaint&, |
| 100 | bool applyStrokeAndPathEffects, bool forceLinearTextOn); |
| 101 | ~SkTextToPathIter(); |
| 102 | |
| 103 | const SkPaint& getPaint() const { return fPaint; } |
| 104 | SkScalar getPathScale() const { return fScale; } |
| 105 | |
| 106 | const SkPath* next(SkScalar* xpos); //!< returns nil when there are no more paths |
| 107 | |
| 108 | private: |
| 109 | SkGlyphCache* fCache; |
| 110 | SkPaint fPaint; |
| 111 | SkScalar fScale; |
| 112 | SkFixed fPrevAdvance; |
| 113 | const char* fText; |
| 114 | const char* fStop; |
| 115 | SkMeasureCacheProc fGlyphCacheProc; |
| 116 | |
| 117 | const SkPath* fPath; // returned in next |
| 118 | SkScalar fXPos; // accumulated xpos, returned in next |
| 119 | SkAutoKern fAutoKern; |
| 120 | }; |
| 121 | |
| 122 | #endif |
| 123 | |
| 124 | |