PictureTest.cpp revision a9157727f7ac11dffe5780a0cfdb6d2bbb179373 
1/*
2 * Copyright 2012 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#include "SkBitmapDevice.h"
9#include "SkCanvas.h"
10#include "SkColorPriv.h"
11#include "SkData.h"
12#include "SkDecodingImageGenerator.h"
13#include "SkError.h"
14#include "SkImageEncoder.h"
15#include "SkImageGenerator.h"
16#include "SkPaint.h"
17#include "SkPicture.h"
18#include "SkPictureUtils.h"
19#include "SkQuadTreePicture.h"
20#include "SkRRect.h"
21#include "SkRandom.h"
22#include "SkShader.h"
23#include "SkStream.h"
24#include "SkTileGrid.h"
25#include "Test.h"
26
27static const int gColorScale = 30;
28static const int gColorOffset = 60;
29
30static void make_bm(SkBitmap* bm, int w, int h, SkColor color, bool immutable) {
31    bm->allocN32Pixels(w, h);
32    bm->eraseColor(color);
33    if (immutable) {
34        bm->setImmutable();
35    }
36}
37
38static void make_checkerboard(SkBitmap* bm, int w, int h, bool immutable) {
39    SkASSERT(w % 2 == 0);
40    SkASSERT(h % 2 == 0);
41    bm->allocPixels(SkImageInfo::Make(w, h, kAlpha_8_SkColorType,
42                                      kPremul_SkAlphaType));
43    SkAutoLockPixels lock(*bm);
44    for (int y = 0; y < h; y += 2) {
45        uint8_t* s = bm->getAddr8(0, y);
46        for (int x = 0; x < w; x += 2) {
47            *s++ = 0xFF;
48            *s++ = 0x00;
49        }
50        s = bm->getAddr8(0, y + 1);
51        for (int x = 0; x < w; x += 2) {
52            *s++ = 0x00;
53            *s++ = 0xFF;
54        }
55    }
56    if (immutable) {
57        bm->setImmutable();
58    }
59}
60
61static void init_paint(SkPaint* paint, const SkBitmap &bm) {
62    SkShader* shader = SkShader::CreateBitmapShader(bm,
63                                                    SkShader::kClamp_TileMode,
64                                                    SkShader::kClamp_TileMode);
65    paint->setShader(shader)->unref();
66}
67
68typedef void (*DrawBitmapProc)(SkCanvas*, const SkBitmap&,
69                               const SkBitmap&, const SkPoint&,
70                               SkTDArray<SkPixelRef*>* usedPixRefs);
71
72static void drawpaint_proc(SkCanvas* canvas, const SkBitmap& bm,
73                           const SkBitmap& altBM, const SkPoint& pos,
74                           SkTDArray<SkPixelRef*>* usedPixRefs) {
75    SkPaint paint;
76    init_paint(&paint, bm);
77
78    canvas->drawPaint(paint);
79    *usedPixRefs->append() = bm.pixelRef();
80}
81
82static void drawpoints_proc(SkCanvas* canvas, const SkBitmap& bm,
83                            const SkBitmap& altBM, const SkPoint& pos,
84                            SkTDArray<SkPixelRef*>* usedPixRefs) {
85    SkPaint paint;
86    init_paint(&paint, bm);
87
88    // draw a rect
89    SkPoint points[5] = {
90        { pos.fX, pos.fY },
91        { pos.fX + bm.width() - 1, pos.fY },
92        { pos.fX + bm.width() - 1, pos.fY + bm.height() - 1 },
93        { pos.fX, pos.fY + bm.height() - 1 },
94        { pos.fX, pos.fY },
95    };
96
97    canvas->drawPoints(SkCanvas::kPolygon_PointMode, 5, points, paint);
98    *usedPixRefs->append() = bm.pixelRef();
99}
100
101static void drawrect_proc(SkCanvas* canvas, const SkBitmap& bm,
102                          const SkBitmap& altBM, const SkPoint& pos,
103                          SkTDArray<SkPixelRef*>* usedPixRefs) {
104    SkPaint paint;
105    init_paint(&paint, bm);
106
107    SkRect r = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
108    r.offset(pos.fX, pos.fY);
109
110    canvas->drawRect(r, paint);
111    *usedPixRefs->append() = bm.pixelRef();
112}
113
114static void drawoval_proc(SkCanvas* canvas, const SkBitmap& bm,
115                          const SkBitmap& altBM, const SkPoint& pos,
116                          SkTDArray<SkPixelRef*>* usedPixRefs) {
117    SkPaint paint;
118    init_paint(&paint, bm);
119
120    SkRect r = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
121    r.offset(pos.fX, pos.fY);
122
123    canvas->drawOval(r, paint);
124    *usedPixRefs->append() = bm.pixelRef();
125}
126
127static void drawrrect_proc(SkCanvas* canvas, const SkBitmap& bm,
128                           const SkBitmap& altBM, const SkPoint& pos,
129                           SkTDArray<SkPixelRef*>* usedPixRefs) {
130    SkPaint paint;
131    init_paint(&paint, bm);
132
133    SkRect r = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
134    r.offset(pos.fX, pos.fY);
135
136    SkRRect rr;
137    rr.setRectXY(r, SkIntToScalar(bm.width())/4, SkIntToScalar(bm.height())/4);
138    canvas->drawRRect(rr, paint);
139    *usedPixRefs->append() = bm.pixelRef();
140}
141
142static void drawpath_proc(SkCanvas* canvas, const SkBitmap& bm,
143                          const SkBitmap& altBM, const SkPoint& pos,
144                          SkTDArray<SkPixelRef*>* usedPixRefs) {
145    SkPaint paint;
146    init_paint(&paint, bm);
147
148    SkPath path;
149    path.lineTo(bm.width()/2.0f, SkIntToScalar(bm.height()));
150    path.lineTo(SkIntToScalar(bm.width()), 0);
151    path.close();
152    path.offset(pos.fX, pos.fY);
153
154    canvas->drawPath(path, paint);
155    *usedPixRefs->append() = bm.pixelRef();
156}
157
158static void drawbitmap_proc(SkCanvas* canvas, const SkBitmap& bm,
159                            const SkBitmap& altBM, const SkPoint& pos,
160                            SkTDArray<SkPixelRef*>* usedPixRefs) {
161    canvas->drawBitmap(bm, pos.fX, pos.fY, NULL);
162    *usedPixRefs->append() = bm.pixelRef();
163}
164
165static void drawbitmap_withshader_proc(SkCanvas* canvas, const SkBitmap& bm,
166                                       const SkBitmap& altBM, const SkPoint& pos,
167                                       SkTDArray<SkPixelRef*>* usedPixRefs) {
168    SkPaint paint;
169    init_paint(&paint, bm);
170
171    // The bitmap in the paint is ignored unless we're drawing an A8 bitmap
172    canvas->drawBitmap(altBM, pos.fX, pos.fY, &paint);
173    *usedPixRefs->append() = bm.pixelRef();
174    *usedPixRefs->append() = altBM.pixelRef();
175}
176
177static void drawsprite_proc(SkCanvas* canvas, const SkBitmap& bm,
178                            const SkBitmap& altBM, const SkPoint& pos,
179                            SkTDArray<SkPixelRef*>* usedPixRefs) {
180    const SkMatrix& ctm = canvas->getTotalMatrix();
181
182    SkPoint p(pos);
183    ctm.mapPoints(&p, 1);
184
185    canvas->drawSprite(bm, (int)p.fX, (int)p.fY, NULL);
186    *usedPixRefs->append() = bm.pixelRef();
187}
188
189#if 0
190// Although specifiable, this case doesn't seem to make sense (i.e., the
191// bitmap in the shader is never used).
192static void drawsprite_withshader_proc(SkCanvas* canvas, const SkBitmap& bm,
193                                       const SkBitmap& altBM, const SkPoint& pos,
194                                       SkTDArray<SkPixelRef*>* usedPixRefs) {
195    SkPaint paint;
196    init_paint(&paint, bm);
197
198    const SkMatrix& ctm = canvas->getTotalMatrix();
199
200    SkPoint p(pos);
201    ctm.mapPoints(&p, 1);
202
203    canvas->drawSprite(altBM, (int)p.fX, (int)p.fY, &paint);
204    *usedPixRefs->append() = bm.pixelRef();
205    *usedPixRefs->append() = altBM.pixelRef();
206}
207#endif
208
209static void drawbitmaprect_proc(SkCanvas* canvas, const SkBitmap& bm,
210                                const SkBitmap& altBM, const SkPoint& pos,
211                                SkTDArray<SkPixelRef*>* usedPixRefs) {
212    SkRect r = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
213
214    r.offset(pos.fX, pos.fY);
215    canvas->drawBitmapRectToRect(bm, NULL, r, NULL);
216    *usedPixRefs->append() = bm.pixelRef();
217}
218
219static void drawbitmaprect_withshader_proc(SkCanvas* canvas,
220                                           const SkBitmap& bm,
221                                           const SkBitmap& altBM,
222                                           const SkPoint& pos,
223                                           SkTDArray<SkPixelRef*>* usedPixRefs) {
224    SkPaint paint;
225    init_paint(&paint, bm);
226
227    SkRect r = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
228    r.offset(pos.fX, pos.fY);
229
230    // The bitmap in the paint is ignored unless we're drawing an A8 bitmap
231    canvas->drawBitmapRectToRect(altBM, NULL, r, &paint);
232    *usedPixRefs->append() = bm.pixelRef();
233    *usedPixRefs->append() = altBM.pixelRef();
234}
235
236static void drawtext_proc(SkCanvas* canvas, const SkBitmap& bm,
237                          const SkBitmap& altBM, const SkPoint& pos,
238                          SkTDArray<SkPixelRef*>* usedPixRefs) {
239    SkPaint paint;
240    init_paint(&paint, bm);
241    paint.setTextSize(SkIntToScalar(1.5*bm.width()));
242
243    canvas->drawText("0", 1, pos.fX, pos.fY+bm.width(), paint);
244    *usedPixRefs->append() = bm.pixelRef();
245}
246
247static void drawpostext_proc(SkCanvas* canvas, const SkBitmap& bm,
248                             const SkBitmap& altBM, const SkPoint& pos,
249                             SkTDArray<SkPixelRef*>* usedPixRefs) {
250    SkPaint paint;
251    init_paint(&paint, bm);
252    paint.setTextSize(SkIntToScalar(1.5*bm.width()));
253
254    SkPoint point = { pos.fX, pos.fY + bm.height() };
255    canvas->drawPosText("O", 1, &point, paint);
256    *usedPixRefs->append() = bm.pixelRef();
257}
258
259static void drawtextonpath_proc(SkCanvas* canvas, const SkBitmap& bm,
260                                const SkBitmap& altBM, const SkPoint& pos,
261                                SkTDArray<SkPixelRef*>* usedPixRefs) {
262    SkPaint paint;
263
264    init_paint(&paint, bm);
265    paint.setTextSize(SkIntToScalar(1.5*bm.width()));
266
267    SkPath path;
268    path.lineTo(SkIntToScalar(bm.width()), 0);
269    path.offset(pos.fX, pos.fY+bm.height());
270
271    canvas->drawTextOnPath("O", 1, path, NULL, paint);
272    *usedPixRefs->append() = bm.pixelRef();
273}
274
275static void drawverts_proc(SkCanvas* canvas, const SkBitmap& bm,
276                           const SkBitmap& altBM, const SkPoint& pos,
277                           SkTDArray<SkPixelRef*>* usedPixRefs) {
278    SkPaint paint;
279    init_paint(&paint, bm);
280
281    SkPoint verts[4] = {
282        { pos.fX, pos.fY },
283        { pos.fX + bm.width(), pos.fY },
284        { pos.fX + bm.width(), pos.fY + bm.height() },
285        { pos.fX, pos.fY + bm.height() }
286    };
287    SkPoint texs[4] = { { 0, 0 },
288                        { SkIntToScalar(bm.width()), 0 },
289                        { SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) },
290                        { 0, SkIntToScalar(bm.height()) } };
291    uint16_t indices[6] = { 0, 1, 2, 0, 2, 3 };
292
293    canvas->drawVertices(SkCanvas::kTriangles_VertexMode, 4, verts, texs, NULL, NULL,
294                         indices, 6, paint);
295    *usedPixRefs->append() = bm.pixelRef();
296}
297
298// Return a picture with the bitmaps drawn at the specified positions.
299static SkPicture* record_bitmaps(const SkBitmap bm[],
300                                 const SkPoint pos[],
301                                 SkTDArray<SkPixelRef*> analytic[],
302                                 int count,
303                                 DrawBitmapProc proc) {
304    SkPicture* pic = new SkPicture;
305    SkCanvas* canvas = pic->beginRecording(1000, 1000);
306    for (int i = 0; i < count; ++i) {
307        analytic[i].rewind();
308        canvas->save();
309        SkRect clipRect = SkRect::MakeXYWH(pos[i].fX, pos[i].fY,
310                                           SkIntToScalar(bm[i].width()),
311                                           SkIntToScalar(bm[i].height()));
312        canvas->clipRect(clipRect, SkRegion::kIntersect_Op);
313        proc(canvas, bm[i], bm[count+i], pos[i], &analytic[i]);
314        canvas->restore();
315    }
316    pic->endRecording();
317    return pic;
318}
319
320static void rand_rect(SkRect* rect, SkRandom& rand, SkScalar W, SkScalar H) {
321    rect->fLeft   = rand.nextRangeScalar(-W, 2*W);
322    rect->fTop    = rand.nextRangeScalar(-H, 2*H);
323    rect->fRight  = rect->fLeft + rand.nextRangeScalar(0, W);
324    rect->fBottom = rect->fTop + rand.nextRangeScalar(0, H);
325
326    // we integralize rect to make our tests more predictable, since Gather is
327    // a little sloppy.
328    SkIRect ir;
329    rect->round(&ir);
330    rect->set(ir);
331}
332
333static void draw(SkPicture* pic, int width, int height, SkBitmap* result) {
334    make_bm(result, width, height, SK_ColorBLACK, false);
335
336    SkCanvas canvas(*result);
337    canvas.drawPicture(*pic);
338}
339
340template <typename T> int find_index(const T* array, T elem, int count) {
341    for (int i = 0; i < count; ++i) {
342        if (array[i] == elem) {
343            return i;
344        }
345    }
346    return -1;
347}
348
349// Return true if 'ref' is found in array[]
350static bool find(SkPixelRef const * const * array, SkPixelRef const * ref, int count) {
351    return find_index<const SkPixelRef*>(array, ref, count) >= 0;
352}
353
354// Look at each pixel that is inside 'subset', and if its color appears in
355// colors[], find the corresponding value in refs[] and append that ref into
356// array, skipping duplicates of the same value.
357// Note that gathering pixelRefs from rendered colors suffers from the problem
358// that multiple simultaneous textures (e.g., A8 for alpha and 8888 for color)
359// isn't easy to reconstruct.
360static void gather_from_image(const SkBitmap& bm, SkPixelRef* const refs[],
361                              int count, SkTDArray<SkPixelRef*>* array,
362                              const SkRect& subset) {
363    SkIRect ir;
364    subset.roundOut(&ir);
365
366    if (!ir.intersect(0, 0, bm.width()-1, bm.height()-1)) {
367        return;
368    }
369
370    // Since we only want to return unique values in array, when we scan we just
371    // set a bit for each index'd color found. In practice we only have a few
372    // distinct colors, so we just use an int's bits as our array. Hence the
373    // assert that count <= number-of-bits-in-our-int.
374    SkASSERT((unsigned)count <= 32);
375    uint32_t bitarray = 0;
376
377    SkAutoLockPixels alp(bm);
378
379    for (int y = ir.fTop; y < ir.fBottom; ++y) {
380        for (int x = ir.fLeft; x < ir.fRight; ++x) {
381            SkPMColor pmc = *bm.getAddr32(x, y);
382            // the only good case where the color is not found would be if
383            // the color is transparent, meaning no bitmap was drawn in that
384            // pixel.
385            if (pmc) {
386                uint32_t index = SkGetPackedR32(pmc);
387                SkASSERT(SkGetPackedG32(pmc) == index);
388                SkASSERT(SkGetPackedB32(pmc) == index);
389                if (0 == index) {
390                    continue;           // background color
391                }
392                SkASSERT(0 == (index - gColorOffset) % gColorScale);
393                index = (index - gColorOffset) / gColorScale;
394                SkASSERT(static_cast<int>(index) < count);
395                bitarray |= 1 << index;
396            }
397        }
398    }
399
400    for (int i = 0; i < count; ++i) {
401        if (bitarray & (1 << i)) {
402            *array->append() = refs[i];
403        }
404    }
405}
406
407static void gather_from_analytic(const SkPoint pos[], SkScalar w, SkScalar h,
408                                 const SkTDArray<SkPixelRef*> analytic[],
409                                 int count,
410                                 SkTDArray<SkPixelRef*>* result,
411                                 const SkRect& subset) {
412    for (int i = 0; i < count; ++i) {
413        SkRect rect = SkRect::MakeXYWH(pos[i].fX, pos[i].fY, w, h);
414
415        if (SkRect::Intersects(subset, rect)) {
416            result->append(analytic[i].count(), analytic[i].begin());
417        }
418    }
419}
420
421
422static const struct {
423    const DrawBitmapProc proc;
424    const char* const desc;
425} gProcs[] = {
426    {drawpaint_proc, "drawpaint"},
427    {drawpoints_proc, "drawpoints"},
428    {drawrect_proc, "drawrect"},
429    {drawoval_proc, "drawoval"},
430    {drawrrect_proc, "drawrrect"},
431    {drawpath_proc, "drawpath"},
432    {drawbitmap_proc, "drawbitmap"},
433    {drawbitmap_withshader_proc, "drawbitmap_withshader"},
434    {drawsprite_proc, "drawsprite"},
435#if 0
436    {drawsprite_withshader_proc, "drawsprite_withshader"},
437#endif
438    {drawbitmaprect_proc, "drawbitmaprect"},
439    {drawbitmaprect_withshader_proc, "drawbitmaprect_withshader"},
440    {drawtext_proc, "drawtext"},
441    {drawpostext_proc, "drawpostext"},
442    {drawtextonpath_proc, "drawtextonpath"},
443    {drawverts_proc, "drawverts"},
444};
445
446static void create_textures(SkBitmap* bm, SkPixelRef** refs, int num, int w, int h) {
447    // Our convention is that the color components contain an encoding of
448    // the index of their corresponding bitmap/pixelref. (0,0,0,0) is
449    // reserved for the background
450    for (int i = 0; i < num; ++i) {
451        make_bm(&bm[i], w, h,
452                SkColorSetARGB(0xFF,
453                               gColorScale*i+gColorOffset,
454                               gColorScale*i+gColorOffset,
455                               gColorScale*i+gColorOffset),
456                true);
457        refs[i] = bm[i].pixelRef();
458    }
459
460    // The A8 alternate bitmaps are all BW checkerboards
461    for (int i = 0; i < num; ++i) {
462        make_checkerboard(&bm[num+i], w, h, true);
463        refs[num+i] = bm[num+i].pixelRef();
464    }
465}
466
467static void test_gatherpixelrefs(skiatest::Reporter* reporter) {
468    const int IW = 32;
469    const int IH = IW;
470    const SkScalar W = SkIntToScalar(IW);
471    const SkScalar H = W;
472
473    static const int N = 4;
474    SkBitmap bm[2*N];
475    SkPixelRef* refs[2*N];
476    SkTDArray<SkPixelRef*> analytic[N];
477
478    const SkPoint pos[N] = {
479        { 0, 0 }, { W, 0 }, { 0, H }, { W, H }
480    };
481
482    create_textures(bm, refs, N, IW, IH);
483
484    SkRandom rand;
485    for (size_t k = 0; k < SK_ARRAY_COUNT(gProcs); ++k) {
486        SkAutoTUnref<SkPicture> pic(
487            record_bitmaps(bm, pos, analytic, N, gProcs[k].proc));
488
489        REPORTER_ASSERT(reporter, pic->willPlayBackBitmaps() || N == 0);
490        // quick check for a small piece of each quadrant, which should just
491        // contain 1 or 2 bitmaps.
492        for (size_t  i = 0; i < SK_ARRAY_COUNT(pos); ++i) {
493            SkRect r;
494            r.set(2, 2, W - 2, H - 2);
495            r.offset(pos[i].fX, pos[i].fY);
496            SkAutoDataUnref data(SkPictureUtils::GatherPixelRefs(pic, r));
497            if (!data) {
498                ERRORF(reporter, "SkPictureUtils::GatherPixelRefs returned "
499                       "NULL for %s.", gProcs[k].desc);
500                continue;
501            }
502            SkPixelRef** gatheredRefs = (SkPixelRef**)data->data();
503            int count = static_cast<int>(data->size() / sizeof(SkPixelRef*));
504            REPORTER_ASSERT(reporter, 1 == count || 2 == count);
505            if (1 == count) {
506                REPORTER_ASSERT(reporter, gatheredRefs[0] == refs[i]);
507            } else if (2 == count) {
508                REPORTER_ASSERT(reporter,
509                    (gatheredRefs[0] == refs[i] && gatheredRefs[1] == refs[i+N]) ||
510                    (gatheredRefs[1] == refs[i] && gatheredRefs[0] == refs[i+N]));
511            }
512        }
513
514        SkBitmap image;
515        draw(pic, 2*IW, 2*IH, &image);
516
517        // Test a bunch of random (mostly) rects, and compare the gather results
518        // with a deduced list of refs by looking at the colors drawn.
519        for (int j = 0; j < 100; ++j) {
520            SkRect r;
521            rand_rect(&r, rand, 2*W, 2*H);
522
523            SkTDArray<SkPixelRef*> fromImage;
524            gather_from_image(image, refs, N, &fromImage, r);
525
526            SkTDArray<SkPixelRef*> fromAnalytic;
527            gather_from_analytic(pos, W, H, analytic, N, &fromAnalytic, r);
528
529            SkData* data = SkPictureUtils::GatherPixelRefs(pic, r);
530            size_t dataSize = data ? data->size() : 0;
531            int gatherCount = static_cast<int>(dataSize / sizeof(SkPixelRef*));
532            SkASSERT(gatherCount * sizeof(SkPixelRef*) == dataSize);
533            SkPixelRef** gatherRefs = data ? (SkPixelRef**)(data->data()) : NULL;
534            SkAutoDataUnref adu(data);
535
536            // Everything that we saw drawn should appear in the analytic list
537            // but the analytic list may contain some pixelRefs that were not
538            // seen in the image (e.g., A8 textures used as masks)
539            for (int i = 0; i < fromImage.count(); ++i) {
540                if (-1 == fromAnalytic.find(fromImage[i])) {
541                    ERRORF(reporter, "PixelRef missing %d %s",
542                           i, gProcs[k].desc);
543                }
544            }
545
546            /*
547             *  GatherPixelRefs is conservative, so it can return more bitmaps
548             *  than are strictly required. Thus our check here is only that
549             *  Gather didn't miss any that we actually needed. Even that isn't
550             *  a strict requirement on Gather, which is meant to be quick and
551             *  only mostly-correct, but at the moment this test should work.
552             */
553            for (int i = 0; i < fromAnalytic.count(); ++i) {
554                bool found = find(gatherRefs, fromAnalytic[i], gatherCount);
555                if (!found) {
556                    ERRORF(reporter, "PixelRef missing %d %s",
557                           i, gProcs[k].desc);
558                }
559#if 0
560                // enable this block of code to debug failures, as it will rerun
561                // the case that failed.
562                if (!found) {
563                    SkData* data = SkPictureUtils::GatherPixelRefs(pic, r);
564                    size_t dataSize = data ? data->size() : 0;
565                }
566#endif
567            }
568        }
569    }
570}
571
572static void test_gatherpixelrefsandrects(skiatest::Reporter* reporter) {
573    const int IW = 32;
574    const int IH = IW;
575    const SkScalar W = SkIntToScalar(IW);
576    const SkScalar H = W;
577
578    static const int N = 4;
579    SkBitmap bm[2*N];
580    SkPixelRef* refs[2*N];
581    SkTDArray<SkPixelRef*> analytic[N];
582
583    const SkPoint pos[N] = {
584        { 0, 0 }, { W, 0 }, { 0, H }, { W, H }
585    };
586
587    create_textures(bm, refs, N, IW, IH);
588
589    SkRandom rand;
590    for (size_t k = 0; k < SK_ARRAY_COUNT(gProcs); ++k) {
591        SkAutoTUnref<SkPicture> pic(
592            record_bitmaps(bm, pos, analytic, N, gProcs[k].proc));
593
594        REPORTER_ASSERT(reporter, pic->willPlayBackBitmaps() || N == 0);
595
596        SkAutoTUnref<SkPictureUtils::SkPixelRefContainer> prCont(
597                                new SkPictureUtils::SkPixelRefsAndRectsList);
598
599        SkPictureUtils::GatherPixelRefsAndRects(pic, prCont);
600
601        // quick check for a small piece of each quadrant, which should just
602        // contain 1 or 2 bitmaps.
603        for (size_t  i = 0; i < SK_ARRAY_COUNT(pos); ++i) {
604            SkRect r;
605            r.set(2, 2, W - 2, H - 2);
606            r.offset(pos[i].fX, pos[i].fY);
607
608            SkTDArray<SkPixelRef*> gatheredRefs;
609            prCont->query(r, &gatheredRefs);
610
611            int count = gatheredRefs.count();
612            REPORTER_ASSERT(reporter, 1 == count || 2 == count);
613            if (1 == count) {
614                REPORTER_ASSERT(reporter, gatheredRefs[0] == refs[i]);
615            } else if (2 == count) {
616                REPORTER_ASSERT(reporter,
617                    (gatheredRefs[0] == refs[i] && gatheredRefs[1] == refs[i+N]) ||
618                    (gatheredRefs[1] == refs[i] && gatheredRefs[0] == refs[i+N]));
619            }
620        }
621
622        SkBitmap image;
623        draw(pic, 2*IW, 2*IH, &image);
624
625        // Test a bunch of random (mostly) rects, and compare the gather results
626        // with the analytic results and the pixel refs seen in a rendering.
627        for (int j = 0; j < 100; ++j) {
628            SkRect r;
629            rand_rect(&r, rand, 2*W, 2*H);
630
631            SkTDArray<SkPixelRef*> fromImage;
632            gather_from_image(image, refs, N, &fromImage, r);
633
634            SkTDArray<SkPixelRef*> fromAnalytic;
635            gather_from_analytic(pos, W, H, analytic, N, &fromAnalytic, r);
636
637            SkTDArray<SkPixelRef*> gatheredRefs;
638            prCont->query(r, &gatheredRefs);
639
640            // Everything that we saw drawn should appear in the analytic list
641            // but the analytic list may contain some pixelRefs that were not
642            // seen in the image (e.g., A8 textures used as masks)
643            for (int i = 0; i < fromImage.count(); ++i) {
644                REPORTER_ASSERT(reporter, -1 != fromAnalytic.find(fromImage[i]));
645            }
646
647            // Everything in the analytic list should appear in the gathered
648            // list.
649            for (int i = 0; i < fromAnalytic.count(); ++i) {
650                REPORTER_ASSERT(reporter, -1 != gatheredRefs.find(fromAnalytic[i]));
651            }
652        }
653    }
654}
655
656#ifdef SK_DEBUG
657// Ensure that deleting SkPicturePlayback does not assert. Asserts only fire in debug mode, so only
658// run in debug mode.
659static void test_deleting_empty_playback() {
660    SkPicture picture;
661    // Creates an SkPictureRecord
662    picture.beginRecording(0, 0);
663    // Turns that into an SkPicturePlayback
664    picture.endRecording();
665    // Deletes the old SkPicturePlayback, and creates a new SkPictureRecord
666    picture.beginRecording(0, 0);
667}
668
669// Ensure that serializing an empty picture does not assert. Likewise only runs in debug mode.
670static void test_serializing_empty_picture() {
671    SkPicture picture;
672    picture.beginRecording(0, 0);
673    picture.endRecording();
674    SkDynamicMemoryWStream stream;
675    picture.serialize(&stream);
676}
677#endif
678
679static void rand_op(SkCanvas* canvas, SkRandom& rand) {
680    SkPaint paint;
681    SkRect rect = SkRect::MakeWH(50, 50);
682
683    SkScalar unit = rand.nextUScalar1();
684    if (unit <= 0.3) {
685//        SkDebugf("save\n");
686        canvas->save();
687    } else if (unit <= 0.6) {
688//        SkDebugf("restore\n");
689        canvas->restore();
690    } else if (unit <= 0.9) {
691//        SkDebugf("clip\n");
692        canvas->clipRect(rect);
693    } else {
694//        SkDebugf("draw\n");
695        canvas->drawPaint(paint);
696    }
697}
698
699static void set_canvas_to_save_count_4(SkCanvas* canvas) {
700    canvas->restoreToCount(1);
701    canvas->save();
702    canvas->save();
703    canvas->save();
704}
705
706static void test_unbalanced_save_restores(skiatest::Reporter* reporter) {
707    SkCanvas testCanvas(100, 100);
708    set_canvas_to_save_count_4(&testCanvas);
709
710    REPORTER_ASSERT(reporter, 4 == testCanvas.getSaveCount());
711
712    SkPaint paint;
713    SkRect rect = SkRect::MakeLTRB(-10000000, -10000000, 10000000, 10000000);
714
715    SkPicture extra_save_picture;
716    extra_save_picture.beginRecording(100, 100);
717    extra_save_picture.getRecordingCanvas()->save();
718    extra_save_picture.getRecordingCanvas()->translate(10, 10);
719    extra_save_picture.getRecordingCanvas()->drawRect(rect, paint);
720    extra_save_picture.getRecordingCanvas()->save();
721    extra_save_picture.getRecordingCanvas()->translate(10, 10);
722    extra_save_picture.getRecordingCanvas()->drawRect(rect, paint);
723
724    testCanvas.drawPicture(extra_save_picture);
725    REPORTER_ASSERT(reporter, 4 == testCanvas.getSaveCount());
726
727    set_canvas_to_save_count_4(&testCanvas);
728
729    SkPicture extra_restore_picture;
730    extra_restore_picture.beginRecording(100, 100);
731    extra_restore_picture.getRecordingCanvas()->save();
732    extra_restore_picture.getRecordingCanvas()->translate(10, 10);
733    extra_restore_picture.getRecordingCanvas()->drawRect(rect, paint);
734    extra_restore_picture.getRecordingCanvas()->save();
735    extra_restore_picture.getRecordingCanvas()->translate(10, 10);
736    extra_restore_picture.getRecordingCanvas()->drawRect(rect, paint);
737    extra_restore_picture.getRecordingCanvas()->restore();
738    extra_restore_picture.getRecordingCanvas()->restore();
739    extra_restore_picture.getRecordingCanvas()->restore();
740    extra_restore_picture.getRecordingCanvas()->restore();
741
742    testCanvas.drawPicture(extra_save_picture);
743    REPORTER_ASSERT(reporter, 4 == testCanvas.getSaveCount());
744
745    SkPicture no_save_picture;
746    extra_restore_picture.beginRecording(100, 100);
747    extra_restore_picture.getRecordingCanvas()->translate(10, 10);
748    extra_restore_picture.getRecordingCanvas()->drawRect(rect, paint);
749
750    testCanvas.drawPicture(extra_save_picture);
751    REPORTER_ASSERT(reporter, 4 == testCanvas.getSaveCount());
752    REPORTER_ASSERT(reporter, testCanvas.getTotalMatrix().isIdentity());
753}
754
755static void test_peephole() {
756    SkRandom rand;
757
758    for (int j = 0; j < 100; j++) {
759        SkRandom rand2(rand); // remember the seed
760
761        SkPicture picture;
762        SkCanvas* canvas = picture.beginRecording(100, 100);
763
764        for (int i = 0; i < 1000; ++i) {
765            rand_op(canvas, rand);
766        }
767        picture.endRecording();
768
769        rand = rand2;
770    }
771
772    {
773        SkPicture picture;
774        SkCanvas* canvas = picture.beginRecording(100, 100);
775        SkRect rect = SkRect::MakeWH(50, 50);
776
777        for (int i = 0; i < 100; ++i) {
778            canvas->save();
779        }
780        while (canvas->getSaveCount() > 1) {
781            canvas->clipRect(rect);
782            canvas->restore();
783        }
784        picture.endRecording();
785    }
786}
787
788#ifndef SK_DEBUG
789// Only test this is in release mode. We deliberately crash in debug mode, since a valid caller
790// should never do this.
791static void test_bad_bitmap() {
792    // This bitmap has a width and height but no pixels. As a result, attempting to record it will
793    // fail.
794    SkBitmap bm;
795    bm.setConfig(SkImageInfo::MakeN32Premul(100, 100));
796    SkPicture picture;
797    SkCanvas* recordingCanvas = picture.beginRecording(100, 100);
798    recordingCanvas->drawBitmap(bm, 0, 0);
799    picture.endRecording();
800
801    SkCanvas canvas;
802    canvas.drawPicture(picture);
803}
804#endif
805
806static SkData* encode_bitmap_to_data(size_t*, const SkBitmap& bm) {
807    return SkImageEncoder::EncodeData(bm, SkImageEncoder::kPNG_Type, 100);
808}
809
810static SkData* serialized_picture_from_bitmap(const SkBitmap& bitmap) {
811    SkPicture picture;
812    SkCanvas* canvas = picture.beginRecording(bitmap.width(), bitmap.height());
813    canvas->drawBitmap(bitmap, 0, 0);
814    SkDynamicMemoryWStream wStream;
815    picture.serialize(&wStream, &encode_bitmap_to_data);
816    return wStream.copyToData();
817}
818
819struct ErrorContext {
820    int fErrors;
821    skiatest::Reporter* fReporter;
822};
823
824static void assert_one_parse_error_cb(SkError error, void* context) {
825    ErrorContext* errorContext = static_cast<ErrorContext*>(context);
826    errorContext->fErrors++;
827    // This test only expects one error, and that is a kParseError. If there are others,
828    // there is some unknown problem.
829    REPORTER_ASSERT_MESSAGE(errorContext->fReporter, 1 == errorContext->fErrors,
830                            "This threw more errors than expected.");
831    REPORTER_ASSERT_MESSAGE(errorContext->fReporter, kParseError_SkError == error,
832                            SkGetLastErrorString());
833}
834
835static void test_bitmap_with_encoded_data(skiatest::Reporter* reporter) {
836    // Create a bitmap that will be encoded.
837    SkBitmap original;
838    make_bm(&original, 100, 100, SK_ColorBLUE, true);
839    SkDynamicMemoryWStream wStream;
840    if (!SkImageEncoder::EncodeStream(&wStream, original, SkImageEncoder::kPNG_Type, 100)) {
841        return;
842    }
843    SkAutoDataUnref data(wStream.copyToData());
844
845    SkBitmap bm;
846    bool installSuccess = SkInstallDiscardablePixelRef(
847         SkDecodingImageGenerator::Create(data, SkDecodingImageGenerator::Options()), &bm, NULL);
848    REPORTER_ASSERT(reporter, installSuccess);
849
850    // Write both bitmaps to pictures, and ensure that the resulting data streams are the same.
851    // Flattening original will follow the old path of performing an encode, while flattening bm
852    // will use the already encoded data.
853    SkAutoDataUnref picture1(serialized_picture_from_bitmap(original));
854    SkAutoDataUnref picture2(serialized_picture_from_bitmap(bm));
855    REPORTER_ASSERT(reporter, picture1->equals(picture2));
856    // Now test that a parse error was generated when trying to create a new SkPicture without
857    // providing a function to decode the bitmap.
858    ErrorContext context;
859    context.fErrors = 0;
860    context.fReporter = reporter;
861    SkSetErrorCallback(assert_one_parse_error_cb, &context);
862    SkMemoryStream pictureStream(picture1);
863    SkClearLastError();
864    SkAutoUnref pictureFromStream(SkPicture::CreateFromStream(&pictureStream, NULL));
865    REPORTER_ASSERT(reporter, pictureFromStream.get() != NULL);
866    SkClearLastError();
867    SkSetErrorCallback(NULL, NULL);
868}
869
870static void test_clone_empty(skiatest::Reporter* reporter) {
871    // This is a regression test for crbug.com/172062
872    // Before the fix, we used to crash accessing a null pointer when we
873    // had a picture with no paints. This test passes by not crashing.
874    {
875        SkPicture picture;
876        picture.beginRecording(1, 1);
877        picture.endRecording();
878        SkPicture* destPicture = picture.clone();
879        REPORTER_ASSERT(reporter, NULL != destPicture);
880        destPicture->unref();
881    }
882    {
883        // Test without call to endRecording
884        SkPicture picture;
885        picture.beginRecording(1, 1);
886        SkPicture* destPicture = picture.clone();
887        REPORTER_ASSERT(reporter, NULL != destPicture);
888        destPicture->unref();
889    }
890}
891
892static void test_draw_empty(skiatest::Reporter* reporter) {
893    SkBitmap result;
894    make_bm(&result, 2, 2, SK_ColorBLACK, false);
895
896    SkCanvas canvas(result);
897
898    {
899        // stock SkPicture
900        SkPicture picture;
901        picture.beginRecording(1, 1);
902        picture.endRecording();
903
904        canvas.drawPicture(picture);
905    }
906
907    {
908        // tile grid
909        SkTileGridPicture::TileGridInfo gridInfo;
910        gridInfo.fMargin.setEmpty();
911        gridInfo.fOffset.setZero();
912        gridInfo.fTileInterval.set(1, 1);
913
914        SkTileGridPicture picture(1, 1, gridInfo);
915        picture.beginRecording(1, 1, SkPicture::kOptimizeForClippedPlayback_RecordingFlag);
916        picture.endRecording();
917
918        canvas.drawPicture(picture);
919    }
920
921    {
922        // RTree
923        SkPicture picture;
924        picture.beginRecording(1, 1, SkPicture::kOptimizeForClippedPlayback_RecordingFlag);
925        picture.endRecording();
926
927        canvas.drawPicture(picture);
928    }
929
930    {
931        // quad tree
932        SkQuadTreePicture picture(SkIRect::MakeWH(1, 1));
933        picture.beginRecording(1, 1, SkPicture::kOptimizeForClippedPlayback_RecordingFlag);
934        picture.endRecording();
935
936        canvas.drawPicture(picture);
937    }
938}
939
940static void test_clip_bound_opt(skiatest::Reporter* reporter) {
941    // Test for crbug.com/229011
942    SkRect rect1 = SkRect::MakeXYWH(SkIntToScalar(4), SkIntToScalar(4),
943                                    SkIntToScalar(2), SkIntToScalar(2));
944    SkRect rect2 = SkRect::MakeXYWH(SkIntToScalar(7), SkIntToScalar(7),
945                                    SkIntToScalar(1), SkIntToScalar(1));
946    SkRect rect3 = SkRect::MakeXYWH(SkIntToScalar(6), SkIntToScalar(6),
947                                    SkIntToScalar(1), SkIntToScalar(1));
948
949    SkPath invPath;
950    invPath.addOval(rect1);
951    invPath.setFillType(SkPath::kInverseEvenOdd_FillType);
952    SkPath path;
953    path.addOval(rect2);
954    SkPath path2;
955    path2.addOval(rect3);
956    SkIRect clipBounds;
957    // Minimalist test set for 100% code coverage of
958    // SkPictureRecord::updateClipConservativelyUsingBounds
959    {
960        SkPicture picture;
961        SkCanvas* canvas = picture.beginRecording(10, 10,
962            SkPicture::kUsePathBoundsForClip_RecordingFlag);
963        canvas->clipPath(invPath, SkRegion::kIntersect_Op);
964        bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
965        REPORTER_ASSERT(reporter, true == nonEmpty);
966        REPORTER_ASSERT(reporter, 0 == clipBounds.fLeft);
967        REPORTER_ASSERT(reporter, 0 == clipBounds.fTop);
968        REPORTER_ASSERT(reporter, 10 == clipBounds.fBottom);
969        REPORTER_ASSERT(reporter, 10 == clipBounds.fRight);
970    }
971    {
972        SkPicture picture;
973        SkCanvas* canvas = picture.beginRecording(10, 10,
974            SkPicture::kUsePathBoundsForClip_RecordingFlag);
975        canvas->clipPath(path, SkRegion::kIntersect_Op);
976        canvas->clipPath(invPath, SkRegion::kIntersect_Op);
977        bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
978        REPORTER_ASSERT(reporter, true == nonEmpty);
979        REPORTER_ASSERT(reporter, 7 == clipBounds.fLeft);
980        REPORTER_ASSERT(reporter, 7 == clipBounds.fTop);
981        REPORTER_ASSERT(reporter, 8 == clipBounds.fBottom);
982        REPORTER_ASSERT(reporter, 8 == clipBounds.fRight);
983    }
984    {
985        SkPicture picture;
986        SkCanvas* canvas = picture.beginRecording(10, 10,
987            SkPicture::kUsePathBoundsForClip_RecordingFlag);
988        canvas->clipPath(path, SkRegion::kIntersect_Op);
989        canvas->clipPath(invPath, SkRegion::kUnion_Op);
990        bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
991        REPORTER_ASSERT(reporter, true == nonEmpty);
992        REPORTER_ASSERT(reporter, 0 == clipBounds.fLeft);
993        REPORTER_ASSERT(reporter, 0 == clipBounds.fTop);
994        REPORTER_ASSERT(reporter, 10 == clipBounds.fBottom);
995        REPORTER_ASSERT(reporter, 10 == clipBounds.fRight);
996    }
997    {
998        SkPicture picture;
999        SkCanvas* canvas = picture.beginRecording(10, 10,
1000            SkPicture::kUsePathBoundsForClip_RecordingFlag);
1001        canvas->clipPath(path, SkRegion::kDifference_Op);
1002        bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
1003        REPORTER_ASSERT(reporter, true == nonEmpty);
1004        REPORTER_ASSERT(reporter, 0 == clipBounds.fLeft);
1005        REPORTER_ASSERT(reporter, 0 == clipBounds.fTop);
1006        REPORTER_ASSERT(reporter, 10 == clipBounds.fBottom);
1007        REPORTER_ASSERT(reporter, 10 == clipBounds.fRight);
1008    }
1009    {
1010        SkPicture picture;
1011        SkCanvas* canvas = picture.beginRecording(10, 10,
1012            SkPicture::kUsePathBoundsForClip_RecordingFlag);
1013        canvas->clipPath(path, SkRegion::kReverseDifference_Op);
1014        bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
1015        // True clip is actually empty in this case, but the best
1016        // determination we can make using only bounds as input is that the
1017        // clip is included in the bounds of 'path'.
1018        REPORTER_ASSERT(reporter, true == nonEmpty);
1019        REPORTER_ASSERT(reporter, 7 == clipBounds.fLeft);
1020        REPORTER_ASSERT(reporter, 7 == clipBounds.fTop);
1021        REPORTER_ASSERT(reporter, 8 == clipBounds.fBottom);
1022        REPORTER_ASSERT(reporter, 8 == clipBounds.fRight);
1023    }
1024    {
1025        SkPicture picture;
1026        SkCanvas* canvas = picture.beginRecording(10, 10,
1027            SkPicture::kUsePathBoundsForClip_RecordingFlag);
1028        canvas->clipPath(path, SkRegion::kIntersect_Op);
1029        canvas->clipPath(path2, SkRegion::kXOR_Op);
1030        bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
1031        REPORTER_ASSERT(reporter, true == nonEmpty);
1032        REPORTER_ASSERT(reporter, 6 == clipBounds.fLeft);
1033        REPORTER_ASSERT(reporter, 6 == clipBounds.fTop);
1034        REPORTER_ASSERT(reporter, 8 == clipBounds.fBottom);
1035        REPORTER_ASSERT(reporter, 8 == clipBounds.fRight);
1036    }
1037}
1038
1039/**
1040 * A canvas that records the number of clip commands.
1041 */
1042class ClipCountingCanvas : public SkCanvas {
1043public:
1044    explicit ClipCountingCanvas(int width, int height)
1045        : INHERITED(width, height)
1046        , fClipCount(0){
1047    }
1048
1049    virtual void onClipRect(const SkRect& r,
1050                            SkRegion::Op op,
1051                            ClipEdgeStyle edgeStyle) SK_OVERRIDE {
1052        fClipCount += 1;
1053        this->INHERITED::onClipRect(r, op, edgeStyle);
1054    }
1055
1056    virtual void onClipRRect(const SkRRect& rrect,
1057                             SkRegion::Op op,
1058                             ClipEdgeStyle edgeStyle)SK_OVERRIDE {
1059        fClipCount += 1;
1060        this->INHERITED::onClipRRect(rrect, op, edgeStyle);
1061    }
1062
1063    virtual void onClipPath(const SkPath& path,
1064                            SkRegion::Op op,
1065                            ClipEdgeStyle edgeStyle) SK_OVERRIDE {
1066        fClipCount += 1;
1067        this->INHERITED::onClipPath(path, op, edgeStyle);
1068    }
1069
1070    virtual void onClipRegion(const SkRegion& deviceRgn, SkRegion::Op op) SK_OVERRIDE {
1071        fClipCount += 1;
1072        this->INHERITED::onClipRegion(deviceRgn, op);
1073    }
1074
1075    unsigned getClipCount() const { return fClipCount; }
1076
1077private:
1078    unsigned fClipCount;
1079
1080    typedef SkCanvas INHERITED;
1081};
1082
1083static void test_clip_expansion(skiatest::Reporter* reporter) {
1084    SkPicture picture;
1085    SkCanvas* canvas = picture.beginRecording(10, 10, 0);
1086
1087    canvas->clipRect(SkRect::MakeEmpty(), SkRegion::kReplace_Op);
1088    // The following expanding clip should not be skipped.
1089    canvas->clipRect(SkRect::MakeXYWH(4, 4, 3, 3), SkRegion::kUnion_Op);
1090    // Draw something so the optimizer doesn't just fold the world.
1091    SkPaint p;
1092    p.setColor(SK_ColorBLUE);
1093    canvas->drawPaint(p);
1094
1095    ClipCountingCanvas testCanvas(10, 10);
1096    picture.draw(&testCanvas);
1097
1098    // Both clips should be present on playback.
1099    REPORTER_ASSERT(reporter, testCanvas.getClipCount() == 2);
1100}
1101
1102static void test_hierarchical(skiatest::Reporter* reporter) {
1103    SkBitmap bm;
1104    make_bm(&bm, 10, 10, SK_ColorRED, true);
1105
1106    SkCanvas* canvas;
1107
1108    SkPicture childPlain;
1109    childPlain.beginRecording(10, 10);
1110    childPlain.endRecording();
1111    REPORTER_ASSERT(reporter, !childPlain.willPlayBackBitmaps()); // 0
1112
1113    SkPicture childWithBitmap;
1114    childWithBitmap.beginRecording(10, 10)->drawBitmap(bm, 0, 0);
1115    childWithBitmap.endRecording();
1116    REPORTER_ASSERT(reporter, childWithBitmap.willPlayBackBitmaps()); // 1
1117
1118    SkPicture parentPP;
1119    canvas = parentPP.beginRecording(10, 10);
1120    canvas->drawPicture(childPlain);
1121    parentPP.endRecording();
1122    REPORTER_ASSERT(reporter, !parentPP.willPlayBackBitmaps()); // 0
1123
1124    SkPicture parentPWB;
1125    canvas = parentPWB.beginRecording(10, 10);
1126    canvas->drawPicture(childWithBitmap);
1127    parentPWB.endRecording();
1128    REPORTER_ASSERT(reporter, parentPWB.willPlayBackBitmaps()); // 1
1129
1130    SkPicture parentWBP;
1131    canvas = parentWBP.beginRecording(10, 10);
1132    canvas->drawBitmap(bm, 0, 0);
1133    canvas->drawPicture(childPlain);
1134    parentWBP.endRecording();
1135    REPORTER_ASSERT(reporter, parentWBP.willPlayBackBitmaps()); // 1
1136
1137    SkPicture parentWBWB;
1138    canvas = parentWBWB.beginRecording(10, 10);
1139    canvas->drawBitmap(bm, 0, 0);
1140    canvas->drawPicture(childWithBitmap);
1141    parentWBWB.endRecording();
1142    REPORTER_ASSERT(reporter, parentWBWB.willPlayBackBitmaps()); // 2
1143}
1144
1145static void test_gen_id(skiatest::Reporter* reporter) {
1146
1147    SkPicture hasData, empty, midRecord;
1148
1149    uint32_t beforeID = hasData.getGenerationID();
1150    REPORTER_ASSERT(reporter, SkPicture::kInvalidGenID != beforeID);
1151
1152    // all 3 pictures should have different ids
1153    REPORTER_ASSERT(reporter, beforeID != empty.getGenerationID());
1154    REPORTER_ASSERT(reporter, beforeID != midRecord.getGenerationID());
1155    REPORTER_ASSERT(reporter, empty.getGenerationID() != midRecord.getGenerationID());
1156
1157    hasData.beginRecording(1, 1);
1158    // gen ID should be invalid mid-record
1159    REPORTER_ASSERT(reporter, SkPicture::kInvalidGenID == hasData.getGenerationID());
1160    hasData.endRecording();
1161    // picture should get a new (non-zero) id after recording
1162    REPORTER_ASSERT(reporter, hasData.getGenerationID() != beforeID);
1163    REPORTER_ASSERT(reporter, hasData.getGenerationID() != SkPicture::kInvalidGenID);
1164
1165    midRecord.beginRecording(1, 1);
1166    REPORTER_ASSERT(reporter, SkPicture::kInvalidGenID == midRecord.getGenerationID());
1167
1168    // test out copy constructor
1169    SkPicture copyWithData(hasData);
1170    REPORTER_ASSERT(reporter, hasData.getGenerationID() == copyWithData.getGenerationID());
1171
1172    SkPicture emptyCopy(empty);
1173    REPORTER_ASSERT(reporter, empty.getGenerationID() != emptyCopy.getGenerationID());
1174
1175    SkPicture copyMidRecord(midRecord);
1176    REPORTER_ASSERT(reporter, midRecord.getGenerationID() != copyMidRecord.getGenerationID());
1177    REPORTER_ASSERT(reporter, copyMidRecord.getGenerationID() != SkPicture::kInvalidGenID);
1178
1179    // test out swap
1180    beforeID = copyMidRecord.getGenerationID();
1181    copyWithData.swap(copyMidRecord);
1182    REPORTER_ASSERT(reporter, copyWithData.getGenerationID() == beforeID);
1183    REPORTER_ASSERT(reporter, copyMidRecord.getGenerationID() == hasData.getGenerationID());
1184
1185    // test out clone
1186    SkAutoTUnref<SkPicture> cloneWithData(hasData.clone());
1187    REPORTER_ASSERT(reporter, hasData.getGenerationID() == cloneWithData->getGenerationID());
1188
1189    SkAutoTUnref<SkPicture> emptyClone(empty.clone());
1190    REPORTER_ASSERT(reporter, empty.getGenerationID() != emptyClone->getGenerationID());
1191
1192    SkAutoTUnref<SkPicture> cloneMidRecord(midRecord.clone());
1193    REPORTER_ASSERT(reporter, midRecord.getGenerationID() != cloneMidRecord->getGenerationID());
1194    REPORTER_ASSERT(reporter, cloneMidRecord->getGenerationID() != SkPicture::kInvalidGenID);
1195}
1196
1197DEF_TEST(Picture, reporter) {
1198#ifdef SK_DEBUG
1199    test_deleting_empty_playback();
1200    test_serializing_empty_picture();
1201#else
1202    test_bad_bitmap();
1203#endif
1204    test_unbalanced_save_restores(reporter);
1205    test_peephole();
1206    test_gatherpixelrefs(reporter);
1207    test_gatherpixelrefsandrects(reporter);
1208    test_bitmap_with_encoded_data(reporter);
1209    test_clone_empty(reporter);
1210    test_draw_empty(reporter);
1211    test_clip_bound_opt(reporter);
1212    test_clip_expansion(reporter);
1213    test_hierarchical(reporter);
1214    test_gen_id(reporter);
1215}
1216
1217static void draw_bitmaps(const SkBitmap bitmap, SkCanvas* canvas) {
1218    const SkPaint paint;
1219    const SkRect rect = { 5.0f, 5.0f, 8.0f, 8.0f };
1220    const SkIRect irect =  { 2, 2, 3, 3 };
1221
1222    // Don't care what these record, as long as they're legal.
1223    canvas->drawBitmap(bitmap, 0.0f, 0.0f, &paint);
1224    canvas->drawBitmapRectToRect(bitmap, &rect, rect, &paint, SkCanvas::kNone_DrawBitmapRectFlag);
1225    canvas->drawBitmapMatrix(bitmap, SkMatrix::I(), &paint);
1226    canvas->drawBitmapNine(bitmap, irect, rect, &paint);
1227    canvas->drawSprite(bitmap, 1, 1);
1228}
1229
1230static void test_draw_bitmaps(SkCanvas* canvas) {
1231    SkBitmap empty;
1232    draw_bitmaps(empty, canvas);
1233    empty.setConfig(SkImageInfo::MakeN32Premul(10, 10));
1234    draw_bitmaps(empty, canvas);
1235}
1236
1237DEF_TEST(Picture_EmptyBitmap, r) {
1238    SkPicture picture;
1239    test_draw_bitmaps(picture.beginRecording(10, 10));
1240    picture.endRecording();
1241}
1242
1243DEF_TEST(Canvas_EmptyBitmap, r) {
1244    SkBitmap dst;
1245    dst.allocN32Pixels(10, 10);
1246    SkCanvas canvas(dst);
1247
1248    test_draw_bitmaps(&canvas);
1249}
1250