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#include "SkBitmapHeap.h"
11#include "SkCanvas.h"
12#include "SkPaint.h"
13#include "SkGPipe.h"
14#include "SkGPipePriv.h"
15#include "SkReader32.h"
16#include "SkStream.h"
17
18#include "SkAnnotation.h"
19#include "SkColorFilter.h"
20#include "SkDrawLooper.h"
21#include "SkImageFilter.h"
22#include "SkMaskFilter.h"
23#include "SkOrderedReadBuffer.h"
24#include "SkPathEffect.h"
25#include "SkRasterizer.h"
26#include "SkRRect.h"
27#include "SkShader.h"
28#include "SkTypeface.h"
29#include "SkXfermode.h"
30
31static SkFlattenable::Type paintflat_to_flattype(PaintFlats pf) {
32    static const uint8_t gEffectTypesInPaintFlatsOrder[] = {
33        SkFlattenable::kSkColorFilter_Type,
34        SkFlattenable::kSkDrawLooper_Type,
35        SkFlattenable::kSkImageFilter_Type,
36        SkFlattenable::kSkMaskFilter_Type,
37        SkFlattenable::kSkPathEffect_Type,
38        SkFlattenable::kSkRasterizer_Type,
39        SkFlattenable::kSkShader_Type,
40        SkFlattenable::kSkXfermode_Type,
41    };
42
43    SkASSERT((size_t)pf < SK_ARRAY_COUNT(gEffectTypesInPaintFlatsOrder));
44    return (SkFlattenable::Type)gEffectTypesInPaintFlatsOrder[pf];
45}
46
47static void set_paintflat(SkPaint* paint, SkFlattenable* obj, unsigned paintFlat) {
48    SkASSERT(paintFlat < kCount_PaintFlats);
49    switch (paintFlat) {
50        case kColorFilter_PaintFlat:
51            paint->setColorFilter((SkColorFilter*)obj);
52            break;
53        case kDrawLooper_PaintFlat:
54            paint->setLooper((SkDrawLooper*)obj);
55            break;
56        case kMaskFilter_PaintFlat:
57            paint->setMaskFilter((SkMaskFilter*)obj);
58            break;
59        case kPathEffect_PaintFlat:
60            paint->setPathEffect((SkPathEffect*)obj);
61            break;
62        case kRasterizer_PaintFlat:
63            paint->setRasterizer((SkRasterizer*)obj);
64            break;
65        case kShader_PaintFlat:
66            paint->setShader((SkShader*)obj);
67            break;
68        case kImageFilter_PaintFlat:
69            paint->setImageFilter((SkImageFilter*)obj);
70            break;
71        case kXfermode_PaintFlat:
72            paint->setXfermode((SkXfermode*)obj);
73            break;
74        default:
75            SkDEBUGFAIL("never gets here");
76    }
77}
78
79template <typename T> class SkRefCntTDArray : public SkTDArray<T> {
80public:
81    ~SkRefCntTDArray() { this->unrefAll(); }
82};
83
84class SkGPipeState : public SkBitmapHeapReader {
85public:
86    SkGPipeState();
87    ~SkGPipeState();
88
89    void setSilent(bool silent) {
90        fSilent = silent;
91    }
92
93    bool shouldDraw() {
94        return !fSilent;
95    }
96
97    void setFlags(unsigned flags) {
98        if (fFlags != flags) {
99            fFlags = flags;
100            this->updateReader();
101        }
102    }
103
104    unsigned getFlags() const {
105        return fFlags;
106    }
107
108    void setReader(SkOrderedReadBuffer* reader) {
109        fReader = reader;
110        this->updateReader();
111    }
112
113    const SkPaint& paint() const { return fPaint; }
114    SkPaint* editPaint() { return &fPaint; }
115
116    SkFlattenable* getFlat(unsigned index) const {
117        if (0 == index) {
118            return NULL;
119        }
120        return fFlatArray[index - 1];
121    }
122
123    void defFlattenable(PaintFlats pf, int index) {
124        index--;
125        SkFlattenable* obj = fReader->readFlattenable(paintflat_to_flattype(pf));
126        if (fFlatArray.count() == index) {
127            *fFlatArray.append() = obj;
128        } else {
129            SkSafeUnref(fFlatArray[index]);
130            fFlatArray[index] = obj;
131        }
132    }
133
134    void defFactory(const char* name) {
135        SkFlattenable::Factory factory = SkFlattenable::NameToFactory(name);
136        if (factory) {
137            SkASSERT(fFactoryArray.find(factory) < 0);
138            *fFactoryArray.append() = factory;
139        }
140    }
141
142    /**
143     * Add a bitmap to the array of bitmaps, or replace an existing one.
144     * This is only used when in cross process mode without a shared heap.
145     */
146    void addBitmap(int index) {
147        SkASSERT(shouldFlattenBitmaps(fFlags));
148        SkBitmap* bm;
149        if(fBitmaps.count() == index) {
150            bm = SkNEW(SkBitmap);
151            *fBitmaps.append() = bm;
152        } else {
153            bm = fBitmaps[index];
154        }
155        fReader->readBitmap(bm);
156    }
157
158    /**
159     * Override of SkBitmapHeapReader, so that SkOrderedReadBuffer can use
160     * these SkBitmaps for bitmap shaders. Used only in cross process mode
161     * without a shared heap.
162     */
163    virtual SkBitmap* getBitmap(int32_t index) const SK_OVERRIDE {
164        SkASSERT(shouldFlattenBitmaps(fFlags));
165        return fBitmaps[index];
166    }
167
168    /**
169     * Needed to be a non-abstract subclass of SkBitmapHeapReader.
170     */
171    virtual void releaseRef(int32_t) SK_OVERRIDE {}
172
173    void setSharedHeap(SkBitmapHeap* heap) {
174        SkASSERT(!shouldFlattenBitmaps(fFlags) || NULL == heap);
175        SkRefCnt_SafeAssign(fSharedHeap, heap);
176        this->updateReader();
177    }
178
179    /**
180     * Access the shared heap. Only used in the case when bitmaps are not
181     * flattened.
182     */
183    SkBitmapHeap* getSharedHeap() const {
184        SkASSERT(!shouldFlattenBitmaps(fFlags));
185        return fSharedHeap;
186    }
187
188    void addTypeface() {
189        size_t size = fReader->read32();
190        const void* data = fReader->skip(SkAlign4(size));
191        SkMemoryStream stream(data, size, false);
192        *fTypefaces.append() = SkTypeface::Deserialize(&stream);
193    }
194
195    void setTypeface(SkPaint* paint, unsigned id) {
196        paint->setTypeface(id ? fTypefaces[id - 1] : NULL);
197    }
198
199private:
200    void updateReader() {
201        if (NULL == fReader) {
202            return;
203        }
204        bool crossProcess = SkToBool(fFlags & SkGPipeWriter::kCrossProcess_Flag);
205        fReader->setFlags(SkSetClearMask(fReader->getFlags(), crossProcess,
206                                         SkFlattenableReadBuffer::kCrossProcess_Flag));
207        if (crossProcess) {
208            fReader->setFactoryArray(&fFactoryArray);
209        } else {
210            fReader->setFactoryArray(NULL);
211        }
212
213        if (shouldFlattenBitmaps(fFlags)) {
214            fReader->setBitmapStorage(this);
215        } else {
216            fReader->setBitmapStorage(fSharedHeap);
217        }
218    }
219    SkOrderedReadBuffer*      fReader;
220    SkPaint                   fPaint;
221    SkTDArray<SkFlattenable*> fFlatArray;
222    SkTDArray<SkTypeface*>    fTypefaces;
223    SkTDArray<SkFlattenable::Factory> fFactoryArray;
224    SkTDArray<SkBitmap*>      fBitmaps;
225    bool                      fSilent;
226    // Only used when sharing bitmaps with the writer.
227    SkBitmapHeap*             fSharedHeap;
228    unsigned                  fFlags;
229};
230
231///////////////////////////////////////////////////////////////////////////////
232
233template <typename T> const T* skip(SkReader32* reader, int count = 1) {
234    SkASSERT(count >= 0);
235    size_t size = sizeof(T) * count;
236    SkASSERT(SkAlign4(size) == size);
237    return reinterpret_cast<const T*>(reader->skip(size));
238}
239
240template <typename T> const T* skipAlign(SkReader32* reader, int count = 1) {
241    SkASSERT(count >= 0);
242    size_t size = SkAlign4(sizeof(T) * count);
243    return reinterpret_cast<const T*>(reader->skip(size));
244}
245
246///////////////////////////////////////////////////////////////////////////////
247///////////////////////////////////////////////////////////////////////////////
248
249static void clipPath_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
250                        SkGPipeState* state) {
251    SkPath path;
252    reader->readPath(&path);
253    bool doAA = SkToBool(DrawOp_unpackFlags(op32) & kClip_HasAntiAlias_DrawOpFlag);
254    canvas->clipPath(path, (SkRegion::Op)DrawOp_unpackData(op32), doAA);
255}
256
257static void clipRegion_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
258                          SkGPipeState* state) {
259    SkRegion rgn;
260    reader->readRegion(&rgn);
261    canvas->clipRegion(rgn, (SkRegion::Op)DrawOp_unpackData(op32));
262}
263
264static void clipRect_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
265                        SkGPipeState* state) {
266    const SkRect* rect = skip<SkRect>(reader);
267    bool doAA = SkToBool(DrawOp_unpackFlags(op32) & kClip_HasAntiAlias_DrawOpFlag);
268    canvas->clipRect(*rect, (SkRegion::Op)DrawOp_unpackData(op32), doAA);
269}
270
271static void clipRRect_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
272                         SkGPipeState* state) {
273    SkRRect rrect;
274    reader->readRRect(&rrect);
275    bool doAA = SkToBool(DrawOp_unpackFlags(op32) & kClip_HasAntiAlias_DrawOpFlag);
276    canvas->clipRRect(rrect, (SkRegion::Op)DrawOp_unpackData(op32), doAA);
277}
278
279///////////////////////////////////////////////////////////////////////////////
280
281static void setMatrix_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
282                      SkGPipeState* state) {
283    SkMatrix matrix;
284    reader->readMatrix(&matrix);
285    canvas->setMatrix(matrix);
286}
287
288static void concat_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
289                      SkGPipeState* state) {
290    SkMatrix matrix;
291    reader->readMatrix(&matrix);
292    canvas->concat(matrix);
293}
294
295static void scale_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
296                      SkGPipeState* state) {
297    const SkScalar* param = skip<SkScalar>(reader, 2);
298    canvas->scale(param[0], param[1]);
299}
300
301static void skew_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
302                      SkGPipeState* state) {
303    const SkScalar* param = skip<SkScalar>(reader, 2);
304    canvas->skew(param[0], param[1]);
305}
306
307static void rotate_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
308                      SkGPipeState* state) {
309    canvas->rotate(reader->readScalar());
310}
311
312static void translate_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
313                      SkGPipeState* state) {
314    const SkScalar* param = skip<SkScalar>(reader, 2);
315    canvas->translate(param[0], param[1]);
316}
317
318///////////////////////////////////////////////////////////////////////////////
319
320static void save_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
321                    SkGPipeState* state) {
322    canvas->save((SkCanvas::SaveFlags)DrawOp_unpackData(op32));
323}
324
325static void saveLayer_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
326                         SkGPipeState* state) {
327    unsigned flags = DrawOp_unpackFlags(op32);
328    SkCanvas::SaveFlags saveFlags = (SkCanvas::SaveFlags)DrawOp_unpackData(op32);
329
330    const SkRect* bounds = NULL;
331    if (flags & kSaveLayer_HasBounds_DrawOpFlag) {
332        bounds = skip<SkRect>(reader);
333    }
334    const SkPaint* paint = NULL;
335    if (flags & kSaveLayer_HasPaint_DrawOpFlag) {
336        paint = &state->paint();
337    }
338    canvas->saveLayer(bounds, paint, saveFlags);
339}
340
341static void restore_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
342                       SkGPipeState* state) {
343    canvas->restore();
344}
345
346///////////////////////////////////////////////////////////////////////////////
347
348static void drawClear_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
349                         SkGPipeState* state) {
350    SkColor color = 0;
351    if (DrawOp_unpackFlags(op32) & kClear_HasColor_DrawOpFlag) {
352        color = reader->readU32();
353    }
354    canvas->clear(color);
355}
356
357static void drawPaint_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
358                         SkGPipeState* state) {
359    if (state->shouldDraw()) {
360        canvas->drawPaint(state->paint());
361    }
362}
363
364static void drawPoints_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
365                          SkGPipeState* state) {
366    SkCanvas::PointMode mode = (SkCanvas::PointMode)DrawOp_unpackFlags(op32);
367    size_t count = reader->readU32();
368    const SkPoint* pts = skip<SkPoint>(reader, count);
369    if (state->shouldDraw()) {
370        canvas->drawPoints(mode, count, pts, state->paint());
371    }
372}
373
374static void drawOval_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
375                        SkGPipeState* state) {
376    const SkRect* rect = skip<SkRect>(reader);
377    if (state->shouldDraw()) {
378        canvas->drawOval(*rect, state->paint());
379    }
380}
381
382static void drawRect_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
383                        SkGPipeState* state) {
384    const SkRect* rect = skip<SkRect>(reader);
385    if (state->shouldDraw()) {
386        canvas->drawRect(*rect, state->paint());
387    }
388}
389
390static void drawRRect_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
391                         SkGPipeState* state) {
392    SkRRect rrect;
393    reader->readRRect(&rrect);
394    if (state->shouldDraw()) {
395        canvas->drawRRect(rrect, state->paint());
396    }
397}
398
399static void drawPath_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
400                        SkGPipeState* state) {
401    SkPath path;
402    reader->readPath(&path);
403    if (state->shouldDraw()) {
404        canvas->drawPath(path, state->paint());
405    }
406}
407
408static void drawVertices_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
409                            SkGPipeState* state) {
410    unsigned flags = DrawOp_unpackFlags(op32);
411
412    SkCanvas::VertexMode mode = (SkCanvas::VertexMode)reader->readU32();
413    int vertexCount = reader->readU32();
414    const SkPoint* verts = skip<SkPoint>(reader, vertexCount);
415
416    const SkPoint* texs = NULL;
417    if (flags & kDrawVertices_HasTexs_DrawOpFlag) {
418        texs = skip<SkPoint>(reader, vertexCount);
419    }
420
421    const SkColor* colors = NULL;
422    if (flags & kDrawVertices_HasColors_DrawOpFlag) {
423        colors = skip<SkColor>(reader, vertexCount);
424    }
425
426    // TODO: flatten/unflatten xfermodes
427    SkXfermode* xfer = NULL;
428
429    int indexCount = 0;
430    const uint16_t* indices = NULL;
431    if (flags & kDrawVertices_HasIndices_DrawOpFlag) {
432        indexCount = reader->readU32();
433        indices = skipAlign<uint16_t>(reader, indexCount);
434    }
435    if (state->shouldDraw()) {
436        canvas->drawVertices(mode, vertexCount, verts, texs, colors, xfer,
437                             indices, indexCount, state->paint());
438    }
439}
440
441///////////////////////////////////////////////////////////////////////////////
442
443static void drawText_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
444                        SkGPipeState* state) {
445    size_t len = reader->readU32();
446    const void* text = reader->skip(SkAlign4(len));
447    const SkScalar* xy = skip<SkScalar>(reader, 2);
448    if (state->shouldDraw()) {
449        canvas->drawText(text, len, xy[0], xy[1], state->paint());
450    }
451}
452
453static void drawPosText_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
454                        SkGPipeState* state) {
455    size_t len = reader->readU32();
456    const void* text = reader->skip(SkAlign4(len));
457    size_t posCount = reader->readU32();    // compute by our writer
458    const SkPoint* pos = skip<SkPoint>(reader, posCount);
459    if (state->shouldDraw()) {
460        canvas->drawPosText(text, len, pos, state->paint());
461    }
462}
463
464static void drawPosTextH_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
465                        SkGPipeState* state) {
466    size_t len = reader->readU32();
467    const void* text = reader->skip(SkAlign4(len));
468    size_t posCount = reader->readU32();    // compute by our writer
469    const SkScalar* xpos = skip<SkScalar>(reader, posCount);
470    SkScalar constY = reader->readScalar();
471    if (state->shouldDraw()) {
472        canvas->drawPosTextH(text, len, xpos, constY, state->paint());
473    }
474}
475
476static void drawTextOnPath_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
477                              SkGPipeState* state) {
478    size_t len = reader->readU32();
479    const void* text = reader->skip(SkAlign4(len));
480
481    SkPath path;
482    reader->readPath(&path);
483
484    SkMatrix matrixStorage;
485    const SkMatrix* matrix = NULL;
486    if (DrawOp_unpackFlags(op32) & kDrawTextOnPath_HasMatrix_DrawOpFlag) {
487        reader->readMatrix(&matrixStorage);
488        matrix = &matrixStorage;
489    }
490    if (state->shouldDraw()) {
491        canvas->drawTextOnPath(text, len, path, matrix, state->paint());
492    }
493}
494
495///////////////////////////////////////////////////////////////////////////////
496
497class BitmapHolder : SkNoncopyable {
498public:
499    BitmapHolder(SkReader32* reader, uint32_t op32, SkGPipeState* state);
500    ~BitmapHolder() {
501        if (fHeapEntry != NULL) {
502            fHeapEntry->releaseRef();
503        }
504    }
505    const SkBitmap* getBitmap() {
506        return fBitmap;
507    }
508private:
509    SkBitmapHeapEntry* fHeapEntry;
510    const SkBitmap*    fBitmap;
511    SkBitmap           fBitmapStorage;
512};
513
514BitmapHolder::BitmapHolder(SkReader32* reader, uint32_t op32,
515                           SkGPipeState* state) {
516    const unsigned flags = state->getFlags();
517    const unsigned index = DrawOp_unpackData(op32);
518    if (shouldFlattenBitmaps(flags)) {
519        fHeapEntry = NULL;
520        fBitmap = state->getBitmap(index);
521    } else {
522        SkBitmapHeapEntry* entry = state->getSharedHeap()->getEntry(index);
523        if (SkToBool(flags & SkGPipeWriter::kSimultaneousReaders_Flag)) {
524            // Make a shallow copy for thread safety. Each thread will point to the same SkPixelRef,
525            // which is thread safe.
526            fBitmapStorage = *entry->getBitmap();
527            fBitmap = &fBitmapStorage;
528            // Release the ref on the bitmap now, since we made our own copy.
529            entry->releaseRef();
530            fHeapEntry = NULL;
531        } else {
532            SkASSERT(!shouldFlattenBitmaps(flags));
533            SkASSERT(!SkToBool(flags & SkGPipeWriter::kSimultaneousReaders_Flag));
534            fHeapEntry = entry;
535            fBitmap = fHeapEntry->getBitmap();
536        }
537    }
538}
539
540static void drawBitmap_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
541                          SkGPipeState* state) {
542    BitmapHolder holder(reader, op32, state);
543    bool hasPaint = SkToBool(DrawOp_unpackFlags(op32) & kDrawBitmap_HasPaint_DrawOpFlag);
544    SkScalar left = reader->readScalar();
545    SkScalar top = reader->readScalar();
546    const SkBitmap* bitmap = holder.getBitmap();
547    if (state->shouldDraw()) {
548        canvas->drawBitmap(*bitmap, left, top, hasPaint ? &state->paint() : NULL);
549    }
550}
551
552static void drawBitmapMatrix_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
553                                SkGPipeState* state) {
554    BitmapHolder holder(reader, op32, state);
555    bool hasPaint = SkToBool(DrawOp_unpackFlags(op32) & kDrawBitmap_HasPaint_DrawOpFlag);
556    SkMatrix matrix;
557    reader->readMatrix(&matrix);
558    const SkBitmap* bitmap = holder.getBitmap();
559    if (state->shouldDraw()) {
560        canvas->drawBitmapMatrix(*bitmap, matrix,
561                                 hasPaint ? &state->paint() : NULL);
562    }
563}
564
565static void drawBitmapNine_rp(SkCanvas* canvas, SkReader32* reader,
566                              uint32_t op32, SkGPipeState* state) {
567    BitmapHolder holder(reader, op32, state);
568    bool hasPaint = SkToBool(DrawOp_unpackFlags(op32) & kDrawBitmap_HasPaint_DrawOpFlag);
569    const SkIRect* center = skip<SkIRect>(reader);
570    const SkRect* dst = skip<SkRect>(reader);
571    const SkBitmap* bitmap = holder.getBitmap();
572    if (state->shouldDraw()) {
573        canvas->drawBitmapNine(*bitmap, *center, *dst,
574                               hasPaint ? &state->paint() : NULL);
575    }
576}
577
578static void drawBitmapRect_rp(SkCanvas* canvas, SkReader32* reader,
579                              uint32_t op32, SkGPipeState* state) {
580    BitmapHolder holder(reader, op32, state);
581    unsigned flags = DrawOp_unpackFlags(op32);
582    bool hasPaint = SkToBool(flags & kDrawBitmap_HasPaint_DrawOpFlag);
583    bool hasSrc = SkToBool(flags & kDrawBitmap_HasSrcRect_DrawOpFlag);
584    const SkRect* src;
585    if (hasSrc) {
586        src = skip<SkRect>(reader);
587    } else {
588        src = NULL;
589    }
590    SkCanvas::DrawBitmapRectFlags dbmrFlags = SkCanvas::kNone_DrawBitmapRectFlag;
591    if (flags & kDrawBitmap_Bleed_DrawOpFlag) {
592        dbmrFlags = (SkCanvas::DrawBitmapRectFlags)(dbmrFlags|SkCanvas::kBleed_DrawBitmapRectFlag);
593    }
594    const SkRect* dst = skip<SkRect>(reader);
595    const SkBitmap* bitmap = holder.getBitmap();
596    if (state->shouldDraw()) {
597        canvas->drawBitmapRectToRect(*bitmap, src, *dst,
598                                     hasPaint ? &state->paint() : NULL, dbmrFlags);
599    }
600}
601
602static void drawSprite_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
603                          SkGPipeState* state) {
604    BitmapHolder holder(reader, op32, state);
605    bool hasPaint = SkToBool(DrawOp_unpackFlags(op32) & kDrawBitmap_HasPaint_DrawOpFlag);
606    const SkIPoint* point = skip<SkIPoint>(reader);
607    const SkBitmap* bitmap = holder.getBitmap();
608    if (state->shouldDraw()) {
609        canvas->drawSprite(*bitmap, point->fX, point->fY, hasPaint ? &state->paint() : NULL);
610    }
611}
612
613///////////////////////////////////////////////////////////////////////////////
614
615static void drawData_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
616                        SkGPipeState* state) {
617    // since we don't have a paint, we can use data for our (small) sizes
618    size_t size = DrawOp_unpackData(op32);
619    if (0 == size) {
620        size = reader->readU32();
621    }
622    const void* data = reader->skip(SkAlign4(size));
623    if (state->shouldDraw()) {
624        canvas->drawData(data, size);
625    }
626}
627
628static void drawPicture_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
629                           SkGPipeState* state) {
630    UNIMPLEMENTED
631}
632
633///////////////////////////////////////////////////////////////////////////////
634
635static void paintOp_rp(SkCanvas*, SkReader32* reader, uint32_t op32,
636                       SkGPipeState* state) {
637    size_t offset = reader->offset();
638    size_t stop = offset + PaintOp_unpackData(op32);
639    SkPaint* p = state->editPaint();
640
641    do {
642        uint32_t p32 = reader->readU32();
643        unsigned op = PaintOp_unpackOp(p32);
644        unsigned data = PaintOp_unpackData(p32);
645
646//        SkDebugf(" read %08X op=%d flags=%d data=%d\n", p32, op, done, data);
647
648        switch (op) {
649            case kReset_PaintOp: p->reset(); break;
650            case kFlags_PaintOp: p->setFlags(data); break;
651            case kColor_PaintOp: p->setColor(reader->readU32()); break;
652            case kStyle_PaintOp: p->setStyle((SkPaint::Style)data); break;
653            case kJoin_PaintOp: p->setStrokeJoin((SkPaint::Join)data); break;
654            case kCap_PaintOp: p->setStrokeCap((SkPaint::Cap)data); break;
655            case kWidth_PaintOp: p->setStrokeWidth(reader->readScalar()); break;
656            case kMiter_PaintOp: p->setStrokeMiter(reader->readScalar()); break;
657            case kEncoding_PaintOp:
658                p->setTextEncoding((SkPaint::TextEncoding)data);
659                break;
660            case kHinting_PaintOp: p->setHinting((SkPaint::Hinting)data); break;
661            case kAlign_PaintOp: p->setTextAlign((SkPaint::Align)data); break;
662            case kTextSize_PaintOp: p->setTextSize(reader->readScalar()); break;
663            case kTextScaleX_PaintOp: p->setTextScaleX(reader->readScalar()); break;
664            case kTextSkewX_PaintOp: p->setTextSkewX(reader->readScalar()); break;
665
666            case kFlatIndex_PaintOp: {
667                PaintFlats pf = (PaintFlats)PaintOp_unpackFlags(p32);
668                unsigned index = data;
669                set_paintflat(p, state->getFlat(index), pf);
670                break;
671            }
672
673            case kTypeface_PaintOp:
674                SkASSERT(SkToBool(state->getFlags() &
675                                  SkGPipeWriter::kCrossProcess_Flag));
676                state->setTypeface(p, data); break;
677            default: SkDEBUGFAIL("bad paintop"); return;
678        }
679        SkASSERT(reader->offset() <= stop);
680    } while (reader->offset() < stop);
681}
682
683static void typeface_rp(SkCanvas*, SkReader32* reader, uint32_t,
684                        SkGPipeState* state) {
685    SkASSERT(!SkToBool(state->getFlags() & SkGPipeWriter::kCrossProcess_Flag));
686    SkPaint* p = state->editPaint();
687    p->setTypeface(static_cast<SkTypeface*>(reader->readPtr()));
688}
689
690static void annotation_rp(SkCanvas*, SkReader32* reader, uint32_t op32,
691                          SkGPipeState* state) {
692    SkPaint* p = state->editPaint();
693
694    const size_t size = DrawOp_unpackData(op32);
695    if (size > 0) {
696        SkOrderedReadBuffer buffer(reader->skip(size), size);
697        p->setAnnotation(SkNEW_ARGS(SkAnnotation, (buffer)))->unref();
698        SkASSERT(buffer.offset() == size);
699    } else {
700        p->setAnnotation(NULL);
701    }
702}
703
704///////////////////////////////////////////////////////////////////////////////
705
706static void def_Typeface_rp(SkCanvas*, SkReader32*, uint32_t, SkGPipeState* state) {
707    state->addTypeface();
708}
709
710static void def_PaintFlat_rp(SkCanvas*, SkReader32*, uint32_t op32,
711                             SkGPipeState* state) {
712    PaintFlats pf = (PaintFlats)DrawOp_unpackFlags(op32);
713    unsigned index = DrawOp_unpackData(op32);
714    state->defFlattenable(pf, index);
715}
716
717static void def_Bitmap_rp(SkCanvas*, SkReader32*, uint32_t op32,
718                          SkGPipeState* state) {
719    unsigned index = DrawOp_unpackData(op32);
720    state->addBitmap(index);
721}
722
723static void def_Factory_rp(SkCanvas*, SkReader32* reader, uint32_t,
724                           SkGPipeState* state) {
725    state->defFactory(reader->readString());
726}
727
728///////////////////////////////////////////////////////////////////////////////
729
730static void skip_rp(SkCanvas*, SkReader32* reader, uint32_t op32, SkGPipeState*) {
731    size_t bytes = DrawOp_unpackData(op32);
732    (void)reader->skip(bytes);
733}
734
735static void reportFlags_rp(SkCanvas*, SkReader32*, uint32_t op32,
736                           SkGPipeState* state) {
737    unsigned flags = DrawOp_unpackFlags(op32);
738    state->setFlags(flags);
739}
740
741static void shareBitmapHeap_rp(SkCanvas*, SkReader32* reader, uint32_t,
742                           SkGPipeState* state) {
743    state->setSharedHeap(static_cast<SkBitmapHeap*>(reader->readPtr()));
744}
745
746static void done_rp(SkCanvas*, SkReader32*, uint32_t, SkGPipeState*) {}
747
748typedef void (*ReadProc)(SkCanvas*, SkReader32*, uint32_t op32, SkGPipeState*);
749
750static const ReadProc gReadTable[] = {
751    skip_rp,
752    clipPath_rp,
753    clipRegion_rp,
754    clipRect_rp,
755    clipRRect_rp,
756    concat_rp,
757    drawBitmap_rp,
758    drawBitmapMatrix_rp,
759    drawBitmapNine_rp,
760    drawBitmapRect_rp,
761    drawClear_rp,
762    drawData_rp,
763    drawOval_rp,
764    drawPaint_rp,
765    drawPath_rp,
766    drawPicture_rp,
767    drawPoints_rp,
768    drawPosText_rp,
769    drawPosTextH_rp,
770    drawRect_rp,
771    drawRRect_rp,
772    drawSprite_rp,
773    drawText_rp,
774    drawTextOnPath_rp,
775    drawVertices_rp,
776    restore_rp,
777    rotate_rp,
778    save_rp,
779    saveLayer_rp,
780    scale_rp,
781    setMatrix_rp,
782    skew_rp,
783    translate_rp,
784
785    paintOp_rp,
786    typeface_rp,
787    annotation_rp,
788
789    def_Typeface_rp,
790    def_PaintFlat_rp,
791    def_Bitmap_rp,
792    def_Factory_rp,
793
794    reportFlags_rp,
795    shareBitmapHeap_rp,
796    done_rp
797};
798
799///////////////////////////////////////////////////////////////////////////////
800
801SkGPipeState::SkGPipeState()
802    : fReader(0)
803    , fSilent(false)
804    , fSharedHeap(NULL)
805    , fFlags(0) {
806
807}
808
809SkGPipeState::~SkGPipeState() {
810    fTypefaces.safeUnrefAll();
811    fFlatArray.safeUnrefAll();
812    fBitmaps.deleteAll();
813    SkSafeUnref(fSharedHeap);
814}
815
816///////////////////////////////////////////////////////////////////////////////
817
818#include "SkGPipe.h"
819
820SkGPipeReader::SkGPipeReader() {
821    fCanvas = NULL;
822    fState = NULL;
823    fProc = NULL;
824}
825
826SkGPipeReader::SkGPipeReader(SkCanvas* target) {
827    fCanvas = NULL;
828    this->setCanvas(target);
829    fState = NULL;
830    fProc = NULL;
831}
832
833void SkGPipeReader::setCanvas(SkCanvas *target) {
834    SkRefCnt_SafeAssign(fCanvas, target);
835}
836
837SkGPipeReader::~SkGPipeReader() {
838    SkSafeUnref(fCanvas);
839    delete fState;
840}
841
842SkGPipeReader::Status SkGPipeReader::playback(const void* data, size_t length,
843                                              uint32_t playbackFlags, size_t* bytesRead) {
844    if (NULL == fCanvas) {
845        return kError_Status;
846    }
847
848    if (NULL == fState) {
849        fState = new SkGPipeState;
850    }
851
852    fState->setSilent(playbackFlags & kSilent_PlaybackFlag);
853
854    SkASSERT(SK_ARRAY_COUNT(gReadTable) == (kDone_DrawOp + 1));
855
856    const ReadProc* table = gReadTable;
857    SkOrderedReadBuffer reader(data, length);
858    reader.setBitmapDecoder(fProc);
859    SkCanvas* canvas = fCanvas;
860    Status status = kEOF_Status;
861
862    fState->setReader(&reader);
863    while (!reader.eof()) {
864        uint32_t op32 = reader.readUInt();
865        unsigned op = DrawOp_unpackOp(op32);
866        // SkDEBUGCODE(DrawOps drawOp = (DrawOps)op;)
867
868        if (op >= SK_ARRAY_COUNT(gReadTable)) {
869            SkDebugf("---- bad op during GPipeState::playback\n");
870            status = kError_Status;
871            break;
872        }
873        if (kDone_DrawOp == op) {
874            status = kDone_Status;
875            break;
876        }
877        table[op](canvas, reader.getReader32(), op32, fState);
878        if ((playbackFlags & kReadAtom_PlaybackFlag) &&
879            (table[op] != paintOp_rp &&
880             table[op] != def_Typeface_rp &&
881             table[op] != def_PaintFlat_rp &&
882             table[op] != def_Bitmap_rp
883             )) {
884                status = kReadAtom_Status;
885                break;
886            }
887    }
888
889    if (bytesRead) {
890        *bytesRead = reader.offset();
891    }
892    return status;
893}
894