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| 1 | |
| 2 /* | |
| 3 * Copyright 2011 Google Inc. | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 | |
| 10 #ifndef SkPDFDevice_DEFINED | |
| 11 #define SkPDFDevice_DEFINED | |
| 12 | |
| 13 #include "SkDevice.h" | |
| 14 #include "SkBitmap.h" | |
| 15 #include "SkCanvas.h" | |
| 16 #include "SkPaint.h" | |
| 17 #include "SkPath.h" | |
| 18 #include "SkPicture.h" | |
| 19 #include "SkRect.h" | |
| 20 #include "SkRefCnt.h" | |
| 21 #include "SkStream.h" | |
| 22 #include "SkTDArray.h" | |
| 23 #include "SkTemplates.h" | |
| 24 | |
| 25 class SkPDFArray; | |
| 26 class SkPDFDevice; | |
| 27 class SkPDFDict; | |
| 28 class SkPDFFont; | |
| 29 class SkPDFFormXObject; | |
| 30 class SkPDFGlyphSetMap; | |
| 31 class SkPDFGraphicState; | |
| 32 class SkPDFObject; | |
| 33 class SkPDFResourceDict; | |
| 34 class SkPDFShader; | |
| 35 class SkPDFStream; | |
| 36 class SkRRect; | |
| 37 template <typename T> class SkTSet; | |
| 38 | |
| 39 // Private classes. | |
| 40 struct ContentEntry; | |
| 41 struct GraphicStateEntry; | |
| 42 struct NamedDestination; | |
| 43 | |
| 44 /** \class SkPDFDevice | |
| 45 | |
| 46 The drawing context for the PDF backend. | |
| 47 */ | |
| 48 class SkPDFDevice : public SkBaseDevice { | |
| 49 public: | |
| 50 /** Create a PDF drawing context with the given width and height. | |
| 51 * 72 points/in means letter paper is 612x792. | |
| 52 * @param pageSize Page size in points. | |
| 53 * @param contentSize The content size of the page in points. This will be | |
| 54 * combined with the initial transform to determine the drawing area | |
| 55 * (as reported by the width and height methods). Anything outside | |
| 56 * of the drawing area will be clipped. | |
| 57 * @param initialTransform The initial transform to apply to the page. | |
| 58 * This may be useful to, for example, move the origin in and | |
| 59 * over a bit to account for a margin, scale the canvas, | |
| 60 * or apply a rotation. Note1: the SkPDFDevice also applies | |
| 61 * a scale+translate transform to move the origin from the | |
| 62 * bottom left (PDF default) to the top left. Note2: drawDevice | |
| 63 * (used by layer restore) draws the device after this initial | |
| 64 * transform is applied, so the PDF device does an | |
| 65 * inverse scale+translate to accommodate the one that SkPDFDevice | |
| 66 * always does. | |
| 67 */ | |
| 68 // Deprecated, please use SkDocument::CreatePdf() instead. | |
| 69 SK_API SkPDFDevice(const SkISize& pageSize, const SkISize& contentSize, | |
| 70 const SkMatrix& initialTransform); | |
| 71 SK_API virtual ~SkPDFDevice(); | |
| 72 | |
| 73 /** These are called inside the per-device-layer loop for each draw call. | |
| 74 When these are called, we have already applied any saveLayer operations, | |
| 75 and are handling any looping from the paint, and any effects from the | |
| 76 DrawFilter. | |
| 77 */ | |
| 78 void drawPaint(const SkDraw&, const SkPaint& paint) SK_OVERRIDE; | |
| 79 void drawPoints(const SkDraw&, SkCanvas::PointMode mode, | |
| 80 size_t count, const SkPoint[], | |
| 81 const SkPaint& paint) SK_OVERRIDE; | |
| 82 void drawRect(const SkDraw&, const SkRect& r, const SkPaint& paint) SK_OVERR
IDE; | |
| 83 void drawOval(const SkDraw&, const SkRect& oval, const SkPaint& paint) SK_OV
ERRIDE; | |
| 84 void drawRRect(const SkDraw&, const SkRRect& rr, const SkPaint& paint) SK_OV
ERRIDE; | |
| 85 void drawPath(const SkDraw&, const SkPath& origpath, | |
| 86 const SkPaint& paint, const SkMatrix* prePathMatrix, | |
| 87 bool pathIsMutable) SK_OVERRIDE; | |
| 88 void drawBitmapRect(const SkDraw& draw, const SkBitmap& bitmap, | |
| 89 const SkRect* src, const SkRect& dst, | |
| 90 const SkPaint& paint, | |
| 91 SkCanvas::DrawBitmapRectFlags flags) SK_OVERRIDE; | |
| 92 void drawBitmap(const SkDraw&, const SkBitmap& bitmap, | |
| 93 const SkMatrix& matrix, const SkPaint&) SK_OVERRIDE; | |
| 94 void drawSprite(const SkDraw&, const SkBitmap& bitmap, int x, int y, | |
| 95 const SkPaint& paint) SK_OVERRIDE; | |
| 96 void drawText(const SkDraw&, const void* text, size_t len, | |
| 97 SkScalar x, SkScalar y, const SkPaint&) SK_OVERRIDE; | |
| 98 void drawPosText(const SkDraw&, const void* text, size_t len, | |
| 99 const SkScalar pos[], int scalarsPerPos, | |
| 100 const SkPoint& offset, const SkPaint&) SK_OVERRIDE; | |
| 101 void drawVertices(const SkDraw&, SkCanvas::VertexMode, | |
| 102 int vertexCount, const SkPoint verts[], | |
| 103 const SkPoint texs[], const SkColor colors[], | |
| 104 SkXfermode* xmode, const uint16_t indices[], | |
| 105 int indexCount, const SkPaint& paint) SK_OVERRIDE; | |
| 106 void drawDevice(const SkDraw&, SkBaseDevice*, int x, int y, | |
| 107 const SkPaint&) SK_OVERRIDE; | |
| 108 | |
| 109 void onAttachToCanvas(SkCanvas* canvas) SK_OVERRIDE; | |
| 110 void onDetachFromCanvas() SK_OVERRIDE; | |
| 111 SkImageInfo imageInfo() const SK_OVERRIDE; | |
| 112 | |
| 113 enum DrawingArea { | |
| 114 kContent_DrawingArea, // Drawing area for the page content. | |
| 115 kMargin_DrawingArea, // Drawing area for the margin content. | |
| 116 }; | |
| 117 | |
| 118 /** Sets the drawing area for the device. Subsequent draw calls are directed | |
| 119 * to the specific drawing area (margin or content). The default drawing | |
| 120 * area is the content drawing area. | |
| 121 * | |
| 122 * Currently if margin content is drawn and then a complex (for PDF) xfer | |
| 123 * mode is used, like SrcIn, Clear, etc, the margin content will get | |
| 124 * clipped. A simple way to avoid the bug is to always draw the margin | |
| 125 * content last. | |
| 126 */ | |
| 127 SK_API void setDrawingArea(DrawingArea drawingArea); | |
| 128 | |
| 129 /** Sets the DCTEncoder for images. | |
| 130 * @param encoder The encoder to encode a bitmap as JPEG (DCT). | |
| 131 * Result of encodings are cached, if the encoder changes the | |
| 132 * behaivor dynamically and an image is added to a second catalog, | |
| 133 * we will likely use the result of the first encoding call. | |
| 134 * By returning false from the encoder function, the encoder result | |
| 135 * is not used. | |
| 136 * Callers might not want to encode small images, as the time spent | |
| 137 * encoding and decoding might not be worth the space savings, | |
| 138 * if any at all. | |
| 139 */ | |
| 140 void setDCTEncoder(SkPicture::EncodeBitmap encoder) { | |
| 141 fEncoder = encoder; | |
| 142 } | |
| 143 | |
| 144 // PDF specific methods. | |
| 145 | |
| 146 /** Returns the resource dictionary for this device. | |
| 147 */ | |
| 148 SK_API SkPDFResourceDict* getResourceDict(); | |
| 149 | |
| 150 /** Get the fonts used on this device. | |
| 151 */ | |
| 152 SK_API const SkTDArray<SkPDFFont*>& getFontResources() const; | |
| 153 | |
| 154 /** Add our named destinations to the supplied dictionary. | |
| 155 * @param dict Dictionary to add destinations to. | |
| 156 * @param page The PDF object representing the page for this device. | |
| 157 */ | |
| 158 void appendDestinations(SkPDFDict* dict, SkPDFObject* page); | |
| 159 | |
| 160 /** Returns a copy of the media box for this device. The caller is required | |
| 161 * to unref() this when it is finished. | |
| 162 */ | |
| 163 SK_API SkPDFArray* copyMediaBox() const; | |
| 164 | |
| 165 /** Get the annotations from this page, or NULL if there are none. | |
| 166 */ | |
| 167 SK_API SkPDFArray* getAnnotations() const { return fAnnotations; } | |
| 168 | |
| 169 /** Returns a SkStream with the page contents. The caller is responsible | |
| 170 for a reference to the returned value. | |
| 171 DEPRECATED: use copyContentToData() | |
| 172 */ | |
| 173 SK_API SkStream* content() const; | |
| 174 | |
| 175 /** Returns a SkStream with the page contents. The caller is responsible | |
| 176 * for calling data->unref() when it is finished. | |
| 177 */ | |
| 178 SK_API SkData* copyContentToData() const; | |
| 179 | |
| 180 SK_API const SkMatrix& initialTransform() const { | |
| 181 return fInitialTransform; | |
| 182 } | |
| 183 | |
| 184 /** Returns a SkPDFGlyphSetMap which represents glyph usage of every font | |
| 185 * that shows on this device. | |
| 186 */ | |
| 187 const SkPDFGlyphSetMap& getFontGlyphUsage() const { | |
| 188 return *(fFontGlyphUsage.get()); | |
| 189 } | |
| 190 | |
| 191 | |
| 192 /** | |
| 193 * rasterDpi - the DPI at which features without native PDF support | |
| 194 * will be rasterized (e.g. draw image with perspective, | |
| 195 * draw text with perspective, ...) | |
| 196 * A larger DPI would create a PDF that reflects the original | |
| 197 * intent with better fidelity, but it can make for larger | |
| 198 * PDF files too, which would use more memory while rendering, | |
| 199 * and it would be slower to be processed or sent online or | |
| 200 * to printer. | |
| 201 */ | |
| 202 void setRasterDpi(SkScalar rasterDpi) { | |
| 203 fRasterDpi = rasterDpi; | |
| 204 } | |
| 205 | |
| 206 protected: | |
| 207 const SkBitmap& onAccessBitmap() SK_OVERRIDE { | |
| 208 return fLegacyBitmap; | |
| 209 } | |
| 210 | |
| 211 SkSurface* newSurface(const SkImageInfo&, const SkSurfaceProps&) SK_OVERRIDE
; | |
| 212 | |
| 213 private: | |
| 214 // TODO(vandebo): push most of SkPDFDevice's state into a core object in | |
| 215 // order to get the right access levels without using friend. | |
| 216 friend class ScopedContentEntry; | |
| 217 | |
| 218 SkISize fPageSize; | |
| 219 SkISize fContentSize; | |
| 220 SkMatrix fInitialTransform; | |
| 221 SkClipStack fExistingClipStack; | |
| 222 SkRegion fExistingClipRegion; | |
| 223 SkPDFArray* fAnnotations; | |
| 224 SkPDFResourceDict* fResourceDict; | |
| 225 SkTDArray<NamedDestination*> fNamedDestinations; | |
| 226 | |
| 227 SkTDArray<SkPDFGraphicState*> fGraphicStateResources; | |
| 228 SkTDArray<SkPDFObject*> fXObjectResources; | |
| 229 SkTDArray<SkPDFFont*> fFontResources; | |
| 230 SkTDArray<SkPDFObject*> fShaderResources; | |
| 231 | |
| 232 SkAutoTDelete<ContentEntry> fContentEntries; | |
| 233 ContentEntry* fLastContentEntry; | |
| 234 SkAutoTDelete<ContentEntry> fMarginContentEntries; | |
| 235 ContentEntry* fLastMarginContentEntry; | |
| 236 DrawingArea fDrawingArea; | |
| 237 | |
| 238 const SkClipStack* fClipStack; | |
| 239 | |
| 240 // Accessor and setter functions based on the current DrawingArea. | |
| 241 SkAutoTDelete<ContentEntry>* getContentEntries(); | |
| 242 ContentEntry* getLastContentEntry(); | |
| 243 void setLastContentEntry(ContentEntry* contentEntry); | |
| 244 | |
| 245 // Glyph ids used for each font on this device. | |
| 246 SkAutoTDelete<SkPDFGlyphSetMap> fFontGlyphUsage; | |
| 247 | |
| 248 SkPicture::EncodeBitmap fEncoder; | |
| 249 SkScalar fRasterDpi; | |
| 250 | |
| 251 SkBitmap fLegacyBitmap; | |
| 252 | |
| 253 SkPDFDevice(const SkISize& layerSize, const SkClipStack& existingClipStack, | |
| 254 const SkRegion& existingClipRegion); | |
| 255 | |
| 256 // override from SkBaseDevice | |
| 257 SkBaseDevice* onCreateCompatibleDevice(const CreateInfo&) SK_OVERRIDE; | |
| 258 | |
| 259 void init(); | |
| 260 void cleanUp(bool clearFontUsage); | |
| 261 SkPDFFormXObject* createFormXObjectFromDevice(); | |
| 262 | |
| 263 void drawFormXObjectWithMask(int xObjectIndex, | |
| 264 SkPDFFormXObject* mask, | |
| 265 const SkClipStack* clipStack, | |
| 266 const SkRegion& clipRegion, | |
| 267 SkXfermode::Mode mode, | |
| 268 bool invertClip); | |
| 269 | |
| 270 // If the paint or clip is such that we shouldn't draw anything, this | |
| 271 // returns NULL and does not create a content entry. | |
| 272 // setUpContentEntry and finishContentEntry can be used directly, but | |
| 273 // the preferred method is to use the ScopedContentEntry helper class. | |
| 274 ContentEntry* setUpContentEntry(const SkClipStack* clipStack, | |
| 275 const SkRegion& clipRegion, | |
| 276 const SkMatrix& matrix, | |
| 277 const SkPaint& paint, | |
| 278 bool hasText, | |
| 279 SkPDFFormXObject** dst); | |
| 280 void finishContentEntry(SkXfermode::Mode xfermode, | |
| 281 SkPDFFormXObject* dst, | |
| 282 SkPath* shape); | |
| 283 bool isContentEmpty(); | |
| 284 | |
| 285 void populateGraphicStateEntryFromPaint(const SkMatrix& matrix, | |
| 286 const SkClipStack& clipStack, | |
| 287 const SkRegion& clipRegion, | |
| 288 const SkPaint& paint, | |
| 289 bool hasText, | |
| 290 GraphicStateEntry* entry); | |
| 291 int addGraphicStateResource(SkPDFGraphicState* gs); | |
| 292 int addXObjectResource(SkPDFObject* xObject); | |
| 293 | |
| 294 void updateFont(const SkPaint& paint, uint16_t glyphID, | |
| 295 ContentEntry* contentEntry); | |
| 296 int getFontResourceIndex(SkTypeface* typeface, uint16_t glyphID); | |
| 297 | |
| 298 void internalDrawPaint(const SkPaint& paint, ContentEntry* contentEntry); | |
| 299 void internalDrawBitmap(const SkMatrix& matrix, | |
| 300 const SkClipStack* clipStack, | |
| 301 const SkRegion& clipRegion, | |
| 302 const SkBitmap& bitmap, | |
| 303 const SkIRect* srcRect, | |
| 304 const SkPaint& paint); | |
| 305 | |
| 306 /** Helper method for copyContentToData. It is responsible for copying the | |
| 307 * list of content entries |entry| to |data|. | |
| 308 */ | |
| 309 void copyContentEntriesToData(ContentEntry* entry, SkWStream* data) const; | |
| 310 | |
| 311 #ifdef SK_PDF_USE_PATHOPS | |
| 312 bool handleInversePath(const SkDraw& d, const SkPath& origPath, | |
| 313 const SkPaint& paint, bool pathIsMutable, | |
| 314 const SkMatrix* prePathMatrix = NULL); | |
| 315 #endif | |
| 316 bool handleRectAnnotation(const SkRect& r, const SkMatrix& matrix, | |
| 317 const SkPaint& paint); | |
| 318 bool handlePointAnnotation(const SkPoint* points, size_t count, | |
| 319 const SkMatrix& matrix, const SkPaint& paint); | |
| 320 SkPDFDict* createLinkAnnotation(const SkRect& r, const SkMatrix& matrix); | |
| 321 void handleLinkToURL(SkData* urlData, const SkRect& r, | |
| 322 const SkMatrix& matrix); | |
| 323 void handleLinkToNamedDest(SkData* nameData, const SkRect& r, | |
| 324 const SkMatrix& matrix); | |
| 325 void defineNamedDestination(SkData* nameData, const SkPoint& point, | |
| 326 const SkMatrix& matrix); | |
| 327 | |
| 328 typedef SkBaseDevice INHERITED; | |
| 329 | |
| 330 // TODO(edisonn): Only SkDocument_PDF and SkPDFImageShader should be able to
create | |
| 331 // an SkPDFDevice | |
| 332 //friend class SkDocument_PDF; | |
| 333 //friend class SkPDFImageShader; | |
| 334 }; | |
| 335 | |
| 336 #endif | |
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Chromium Code Reviews
Issue 727343002:
move SkPDFD*.h from include to src (Closed)
Base URL: https://skia.googlesource.com/skia.git@master