1 /* 2 * Copyright 2013 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkBitmapDevice_DEFINED 9 #define SkBitmapDevice_DEFINED 10 11 #include "include/core/SkBitmap.h" 12 #include "include/core/SkCanvas.h" 13 #include "include/core/SkColor.h" 14 #include "include/core/SkImageInfo.h" 15 #include "include/core/SkRect.h" 16 #include "include/core/SkScalar.h" 17 #include "include/core/SkSize.h" 18 #include "include/core/SkSurfaceProps.h" 19 #include "src/core/SkDevice.h" 20 #include "src/core/SkGlyphRunPainter.h" 21 #include "src/core/SkRasterClip.h" 22 #include "src/core/SkRasterClipStack.h" 23 24 class SkImageFilterCache; 25 class SkMatrix; 26 class SkPaint; 27 class SkPath; 28 class SkPixmap; 29 class SkRasterHandleAllocator; 30 class SkRRect; 31 class SkSurface; 32 struct SkPoint; 33 34 /////////////////////////////////////////////////////////////////////////////// 35 class SkBitmapDevice : public SkBaseDevice { 36 public: 37 /** 38 * Construct a new device with the specified bitmap as its backend. It is 39 * valid for the bitmap to have no pixels associated with it. In that case, 40 * any drawing to this device will have no effect. 41 */ 42 SkBitmapDevice(const SkBitmap& bitmap); 43 44 /** 45 * Create a new device along with its requisite pixel memory using 46 * default SkSurfaceProps (i.e., kLegacyFontHost_InitType-style). 47 * Note: this entry point is slated for removal - no one should call it. 48 */ 49 static SkBitmapDevice* Create(const SkImageInfo& info); 50 51 /** 52 * Construct a new device with the specified bitmap as its backend. It is 53 * valid for the bitmap to have no pixels associated with it. In that case, 54 * any drawing to this device will have no effect. 55 */ 56 SkBitmapDevice(const SkBitmap& bitmap, const SkSurfaceProps& surfaceProps, 57 void* externalHandle, const SkBitmap* coverage); 58 59 static SkBitmapDevice* Create(const SkImageInfo&, const SkSurfaceProps&, 60 bool trackCoverage, 61 SkRasterHandleAllocator*); 62 Create(const SkImageInfo & info,const SkSurfaceProps & props)63 static SkBitmapDevice* Create(const SkImageInfo& info, const SkSurfaceProps& props) { 64 return Create(info, props, false, nullptr); 65 } 66 accessCoverage()67 const SkPixmap* accessCoverage() const { 68 return fCoverage ? &fCoverage->pixmap() : nullptr; 69 } 70 71 protected: getRasterHandle()72 void* getRasterHandle() const override { return fRasterHandle; } 73 74 /** These are called inside the per-device-layer loop for each draw call. 75 When these are called, we have already applied any saveLayer operations, 76 and are handling any looping from the paint. 77 */ 78 void drawPaint(const SkPaint& paint) override; 79 void drawPoints(SkCanvas::PointMode mode, size_t count, 80 const SkPoint[], const SkPaint& paint) override; 81 void drawRect(const SkRect& r, const SkPaint& paint) override; 82 void drawOval(const SkRect& oval, const SkPaint& paint) override; 83 void drawRRect(const SkRRect& rr, const SkPaint& paint) override; 84 85 /** 86 * If pathIsMutable, then the implementation is allowed to cast path to a 87 * non-const pointer and modify it in place (as an optimization). Canvas 88 * may do this to implement helpers such as drawOval, by placing a temp 89 * path on the stack to hold the representation of the oval. 90 */ 91 void drawPath(const SkPath&, const SkPaint&, bool pathIsMutable) override; 92 93 void drawImageRect(const SkImage*, const SkRect* src, const SkRect& dst, 94 const SkSamplingOptions&, const SkPaint&, 95 SkCanvas::SrcRectConstraint) override; 96 97 void drawVertices(const SkVertices*, SkBlendMode, const SkPaint&) override; 98 void drawAtlas(const SkRSXform[], const SkRect[], const SkColor[], int count, SkBlendMode, 99 const SkPaint&) override; 100 101 /////////////////////////////////////////////////////////////////////////// 102 103 void drawDevice(SkBaseDevice*, const SkSamplingOptions&, const SkPaint&) override; 104 void drawSpecial(SkSpecialImage*, const SkMatrix&, const SkSamplingOptions&, 105 const SkPaint&) override; 106 107 sk_sp<SkSpecialImage> makeSpecial(const SkBitmap&) override; 108 sk_sp<SkSpecialImage> makeSpecial(const SkImage*) override; 109 sk_sp<SkSpecialImage> snapSpecial(const SkIRect&, bool = false) override; setImmutable()110 void setImmutable() override { fBitmap.setImmutable(); } 111 112 /////////////////////////////////////////////////////////////////////////// 113 114 void onDrawGlyphRunList(const SkGlyphRunList& glyphRunList, const SkPaint& paint) override; 115 bool onReadPixels(const SkPixmap&, int x, int y) override; 116 bool onWritePixels(const SkPixmap&, int, int) override; 117 bool onPeekPixels(SkPixmap*) override; 118 bool onAccessPixels(SkPixmap*) override; 119 120 void onSave() override; 121 void onRestore() override; 122 void onClipRect(const SkRect& rect, SkClipOp, bool aa) override; 123 void onClipRRect(const SkRRect& rrect, SkClipOp, bool aa) override; 124 void onClipPath(const SkPath& path, SkClipOp, bool aa) override; 125 void onClipShader(sk_sp<SkShader>) override; 126 void onClipRegion(const SkRegion& deviceRgn, SkClipOp) override; 127 void onReplaceClip(const SkIRect& rect) override; 128 bool onClipIsAA() const override; 129 bool onClipIsWideOpen() const override; 130 void onAsRgnClip(SkRegion*) const override; 131 void validateDevBounds(const SkIRect& r) override; 132 ClipType onGetClipType() const override; 133 SkIRect onDevClipBounds() const override; 134 135 void drawBitmap(const SkBitmap&, const SkMatrix&, const SkRect* dstOrNull, 136 const SkSamplingOptions&, const SkPaint&); 137 138 private: 139 friend class SkCanvas; 140 friend class SkDraw; 141 friend class SkDrawTiler; 142 friend class SkSurface_Raster; 143 144 class BDDraw; 145 146 // used to change the backend's pixels (and possibly config/rowbytes) 147 // but cannot change the width/height, so there should be no change to 148 // any clip information. 149 void replaceBitmapBackendForRasterSurface(const SkBitmap&) override; 150 151 SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) override; 152 153 sk_sp<SkSurface> makeSurface(const SkImageInfo&, const SkSurfaceProps&) override; 154 155 SkImageFilterCache* getImageFilterCache() override; 156 157 SkBitmap fBitmap; 158 void* fRasterHandle = nullptr; 159 SkRasterClipStack fRCStack; 160 std::unique_ptr<SkBitmap> fCoverage; // if non-null, will have the same dimensions as fBitmap 161 SkGlyphRunListPainter fGlyphPainter; 162 163 164 using INHERITED = SkBaseDevice; 165 }; 166 167 class SkBitmapDeviceFilteredSurfaceProps { 168 public: SkBitmapDeviceFilteredSurfaceProps(const SkBitmap & bitmap,const SkPaint & paint,const SkSurfaceProps & surfaceProps)169 SkBitmapDeviceFilteredSurfaceProps(const SkBitmap& bitmap, const SkPaint& paint, 170 const SkSurfaceProps& surfaceProps) 171 : fSurfaceProps((kN32_SkColorType != bitmap.colorType() || !paint.isSrcOver()) 172 ? fLazy.init(surfaceProps.flags(), kUnknown_SkPixelGeometry) 173 : &surfaceProps) 174 { } 175 176 SkBitmapDeviceFilteredSurfaceProps(const SkBitmapDeviceFilteredSurfaceProps&) = delete; 177 SkBitmapDeviceFilteredSurfaceProps& operator=(const SkBitmapDeviceFilteredSurfaceProps&) = delete; 178 SkBitmapDeviceFilteredSurfaceProps(SkBitmapDeviceFilteredSurfaceProps&&) = delete; 179 SkBitmapDeviceFilteredSurfaceProps& operator=(SkBitmapDeviceFilteredSurfaceProps&&) = delete; 180 operator()181 const SkSurfaceProps& operator()() const { return *fSurfaceProps; } 182 183 private: 184 SkTLazy<SkSurfaceProps> fLazy; 185 SkSurfaceProps const * const fSurfaceProps; 186 }; 187 188 #endif // SkBitmapDevice_DEFINED 189