PictureTest.cpp revision 5bee0543f0a42aff90f725fb313b34ed702f44d8 
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 "SkRRect.h"
20#include "SkRandom.h"
21#include "SkShader.h"
22#include "SkStream.h"
23#include "Test.h"
24
25static const int gColorScale = 30;
26static const int gColorOffset = 60;
27
28static void make_bm(SkBitmap* bm, int w, int h, SkColor color, bool immutable) {
29    bm->allocN32Pixels(w, h);
30    bm->eraseColor(color);
31    if (immutable) {
32        bm->setImmutable();
33    }
34}
35
36static void make_checkerboard(SkBitmap* bm, int w, int h, bool immutable) {
37    SkASSERT(w % 2 == 0);
38    SkASSERT(h % 2 == 0);
39    bm->allocPixels(SkImageInfo::Make(w, h, kAlpha_8_SkColorType,
40                                      kPremul_SkAlphaType));
41    SkAutoLockPixels lock(*bm);
42    for (int y = 0; y < h; y += 2) {
43        uint8_t* s = bm->getAddr8(0, y);
44        for (int x = 0; x < w; x += 2) {
45            *s++ = 0xFF;
46            *s++ = 0x00;
47        }
48        s = bm->getAddr8(0, y + 1);
49        for (int x = 0; x < w; x += 2) {
50            *s++ = 0x00;
51            *s++ = 0xFF;
52        }
53    }
54    if (immutable) {
55        bm->setImmutable();
56    }
57}
58
59static void init_paint(SkPaint* paint, const SkBitmap &bm) {
60    SkShader* shader = SkShader::CreateBitmapShader(bm,
61                                                    SkShader::kClamp_TileMode,
62                                                    SkShader::kClamp_TileMode);
63    paint->setShader(shader)->unref();
64}
65
66typedef void (*DrawBitmapProc)(SkCanvas*, const SkBitmap&,
67                               const SkBitmap&, const SkPoint&,
68                               SkTDArray<SkPixelRef*>* usedPixRefs);
69
70static void drawpaint_proc(SkCanvas* canvas, const SkBitmap& bm,
71                           const SkBitmap& altBM, const SkPoint& pos,
72                           SkTDArray<SkPixelRef*>* usedPixRefs) {
73    SkPaint paint;
74    init_paint(&paint, bm);
75
76    canvas->drawPaint(paint);
77    *usedPixRefs->append() = bm.pixelRef();
78}
79
80static void drawpoints_proc(SkCanvas* canvas, const SkBitmap& bm,
81                            const SkBitmap& altBM, const SkPoint& pos,
82                            SkTDArray<SkPixelRef*>* usedPixRefs) {
83    SkPaint paint;
84    init_paint(&paint, bm);
85
86    // draw a rect
87    SkPoint points[5] = {
88        { pos.fX, pos.fY },
89        { pos.fX + bm.width() - 1, pos.fY },
90        { pos.fX + bm.width() - 1, pos.fY + bm.height() - 1 },
91        { pos.fX, pos.fY + bm.height() - 1 },
92        { pos.fX, pos.fY },
93    };
94
95    canvas->drawPoints(SkCanvas::kPolygon_PointMode, 5, points, paint);
96    *usedPixRefs->append() = bm.pixelRef();
97}
98
99static void drawrect_proc(SkCanvas* canvas, const SkBitmap& bm,
100                          const SkBitmap& altBM, const SkPoint& pos,
101                          SkTDArray<SkPixelRef*>* usedPixRefs) {
102    SkPaint paint;
103    init_paint(&paint, bm);
104
105    SkRect r = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
106    r.offset(pos.fX, pos.fY);
107
108    canvas->drawRect(r, paint);
109    *usedPixRefs->append() = bm.pixelRef();
110}
111
112static void drawoval_proc(SkCanvas* canvas, const SkBitmap& bm,
113                          const SkBitmap& altBM, const SkPoint& pos,
114                          SkTDArray<SkPixelRef*>* usedPixRefs) {
115    SkPaint paint;
116    init_paint(&paint, bm);
117
118    SkRect r = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
119    r.offset(pos.fX, pos.fY);
120
121    canvas->drawOval(r, paint);
122    *usedPixRefs->append() = bm.pixelRef();
123}
124
125static void drawrrect_proc(SkCanvas* canvas, const SkBitmap& bm,
126                           const SkBitmap& altBM, const SkPoint& pos,
127                           SkTDArray<SkPixelRef*>* usedPixRefs) {
128    SkPaint paint;
129    init_paint(&paint, bm);
130
131    SkRect r = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
132    r.offset(pos.fX, pos.fY);
133
134    SkRRect rr;
135    rr.setRectXY(r, SkIntToScalar(bm.width())/4, SkIntToScalar(bm.height())/4);
136    canvas->drawRRect(rr, paint);
137    *usedPixRefs->append() = bm.pixelRef();
138}
139
140static void drawpath_proc(SkCanvas* canvas, const SkBitmap& bm,
141                          const SkBitmap& altBM, const SkPoint& pos,
142                          SkTDArray<SkPixelRef*>* usedPixRefs) {
143    SkPaint paint;
144    init_paint(&paint, bm);
145
146    SkPath path;
147    path.lineTo(bm.width()/2.0f, SkIntToScalar(bm.height()));
148    path.lineTo(SkIntToScalar(bm.width()), 0);
149    path.close();
150    path.offset(pos.fX, pos.fY);
151
152    canvas->drawPath(path, paint);
153    *usedPixRefs->append() = bm.pixelRef();
154}
155
156static void drawbitmap_proc(SkCanvas* canvas, const SkBitmap& bm,
157                            const SkBitmap& altBM, const SkPoint& pos,
158                            SkTDArray<SkPixelRef*>* usedPixRefs) {
159    canvas->drawBitmap(bm, pos.fX, pos.fY, NULL);
160    *usedPixRefs->append() = bm.pixelRef();
161}
162
163static void drawbitmap_withshader_proc(SkCanvas* canvas, const SkBitmap& bm,
164                                       const SkBitmap& altBM, const SkPoint& pos,
165                                       SkTDArray<SkPixelRef*>* usedPixRefs) {
166    SkPaint paint;
167    init_paint(&paint, bm);
168
169    // The bitmap in the paint is ignored unless we're drawing an A8 bitmap
170    canvas->drawBitmap(altBM, pos.fX, pos.fY, &paint);
171    *usedPixRefs->append() = bm.pixelRef();
172    *usedPixRefs->append() = altBM.pixelRef();
173}
174
175static void drawsprite_proc(SkCanvas* canvas, const SkBitmap& bm,
176                            const SkBitmap& altBM, const SkPoint& pos,
177                            SkTDArray<SkPixelRef*>* usedPixRefs) {
178    const SkMatrix& ctm = canvas->getTotalMatrix();
179
180    SkPoint p(pos);
181    ctm.mapPoints(&p, 1);
182
183    canvas->drawSprite(bm, (int)p.fX, (int)p.fY, NULL);
184    *usedPixRefs->append() = bm.pixelRef();
185}
186
187#if 0
188// Although specifiable, this case doesn't seem to make sense (i.e., the
189// bitmap in the shader is never used).
190static void drawsprite_withshader_proc(SkCanvas* canvas, const SkBitmap& bm,
191                                       const SkBitmap& altBM, const SkPoint& pos,
192                                       SkTDArray<SkPixelRef*>* usedPixRefs) {
193    SkPaint paint;
194    init_paint(&paint, bm);
195
196    const SkMatrix& ctm = canvas->getTotalMatrix();
197
198    SkPoint p(pos);
199    ctm.mapPoints(&p, 1);
200
201    canvas->drawSprite(altBM, (int)p.fX, (int)p.fY, &paint);
202    *usedPixRefs->append() = bm.pixelRef();
203    *usedPixRefs->append() = altBM.pixelRef();
204}
205#endif
206
207static void drawbitmaprect_proc(SkCanvas* canvas, const SkBitmap& bm,
208                                const SkBitmap& altBM, const SkPoint& pos,
209                                SkTDArray<SkPixelRef*>* usedPixRefs) {
210    SkRect r = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
211
212    r.offset(pos.fX, pos.fY);
213    canvas->drawBitmapRectToRect(bm, NULL, r, NULL);
214    *usedPixRefs->append() = bm.pixelRef();
215}
216
217static void drawbitmaprect_withshader_proc(SkCanvas* canvas,
218                                           const SkBitmap& bm,
219                                           const SkBitmap& altBM,
220                                           const SkPoint& pos,
221                                           SkTDArray<SkPixelRef*>* usedPixRefs) {
222    SkPaint paint;
223    init_paint(&paint, bm);
224
225    SkRect r = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
226    r.offset(pos.fX, pos.fY);
227
228    // The bitmap in the paint is ignored unless we're drawing an A8 bitmap
229    canvas->drawBitmapRectToRect(altBM, NULL, r, &paint);
230    *usedPixRefs->append() = bm.pixelRef();
231    *usedPixRefs->append() = altBM.pixelRef();
232}
233
234static void drawtext_proc(SkCanvas* canvas, const SkBitmap& bm,
235                          const SkBitmap& altBM, const SkPoint& pos,
236                          SkTDArray<SkPixelRef*>* usedPixRefs) {
237    SkPaint paint;
238    init_paint(&paint, bm);
239    paint.setTextSize(SkIntToScalar(1.5*bm.width()));
240
241    canvas->drawText("0", 1, pos.fX, pos.fY+bm.width(), paint);
242    *usedPixRefs->append() = bm.pixelRef();
243}
244
245static void drawpostext_proc(SkCanvas* canvas, const SkBitmap& bm,
246                             const SkBitmap& altBM, const SkPoint& pos,
247                             SkTDArray<SkPixelRef*>* usedPixRefs) {
248    SkPaint paint;
249    init_paint(&paint, bm);
250    paint.setTextSize(SkIntToScalar(1.5*bm.width()));
251
252    SkPoint point = { pos.fX, pos.fY + bm.height() };
253    canvas->drawPosText("O", 1, &point, paint);
254    *usedPixRefs->append() = bm.pixelRef();
255}
256
257static void drawtextonpath_proc(SkCanvas* canvas, const SkBitmap& bm,
258                                const SkBitmap& altBM, const SkPoint& pos,
259                                SkTDArray<SkPixelRef*>* usedPixRefs) {
260    SkPaint paint;
261
262    init_paint(&paint, bm);
263    paint.setTextSize(SkIntToScalar(1.5*bm.width()));
264
265    SkPath path;
266    path.lineTo(SkIntToScalar(bm.width()), 0);
267    path.offset(pos.fX, pos.fY+bm.height());
268
269    canvas->drawTextOnPath("O", 1, path, NULL, paint);
270    *usedPixRefs->append() = bm.pixelRef();
271}
272
273static void drawverts_proc(SkCanvas* canvas, const SkBitmap& bm,
274                           const SkBitmap& altBM, const SkPoint& pos,
275                           SkTDArray<SkPixelRef*>* usedPixRefs) {
276    SkPaint paint;
277    init_paint(&paint, bm);
278
279    SkPoint verts[4] = {
280        { pos.fX, pos.fY },
281        { pos.fX + bm.width(), pos.fY },
282        { pos.fX + bm.width(), pos.fY + bm.height() },
283        { pos.fX, pos.fY + bm.height() }
284    };
285    SkPoint texs[4] = { { 0, 0 },
286                        { SkIntToScalar(bm.width()), 0 },
287                        { SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) },
288                        { 0, SkIntToScalar(bm.height()) } };
289    uint16_t indices[6] = { 0, 1, 2, 0, 2, 3 };
290
291    canvas->drawVertices(SkCanvas::kTriangles_VertexMode, 4, verts, texs, NULL, NULL,
292                         indices, 6, paint);
293    *usedPixRefs->append() = bm.pixelRef();
294}
295
296// Return a picture with the bitmaps drawn at the specified positions.
297static SkPicture* record_bitmaps(const SkBitmap bm[],
298                                 const SkPoint pos[],
299                                 SkTDArray<SkPixelRef*> analytic[],
300                                 int count,
301                                 DrawBitmapProc proc) {
302    SkPicture* pic = new SkPicture;
303    SkCanvas* canvas = pic->beginRecording(1000, 1000);
304    for (int i = 0; i < count; ++i) {
305        analytic[i].rewind();
306        canvas->save();
307        SkRect clipRect = SkRect::MakeXYWH(pos[i].fX, pos[i].fY,
308                                           SkIntToScalar(bm[i].width()),
309                                           SkIntToScalar(bm[i].height()));
310        canvas->clipRect(clipRect, SkRegion::kIntersect_Op);
311        proc(canvas, bm[i], bm[count+i], pos[i], &analytic[i]);
312        canvas->restore();
313    }
314    pic->endRecording();
315    return pic;
316}
317
318static void rand_rect(SkRect* rect, SkRandom& rand, SkScalar W, SkScalar H) {
319    rect->fLeft   = rand.nextRangeScalar(-W, 2*W);
320    rect->fTop    = rand.nextRangeScalar(-H, 2*H);
321    rect->fRight  = rect->fLeft + rand.nextRangeScalar(0, W);
322    rect->fBottom = rect->fTop + rand.nextRangeScalar(0, H);
323
324    // we integralize rect to make our tests more predictable, since Gather is
325    // a little sloppy.
326    SkIRect ir;
327    rect->round(&ir);
328    rect->set(ir);
329}
330
331static void draw(SkPicture* pic, int width, int height, SkBitmap* result) {
332    make_bm(result, width, height, SK_ColorBLACK, false);
333
334    SkCanvas canvas(*result);
335    canvas.drawPicture(*pic);
336}
337
338template <typename T> int find_index(const T* array, T elem, int count) {
339    for (int i = 0; i < count; ++i) {
340        if (array[i] == elem) {
341            return i;
342        }
343    }
344    return -1;
345}
346
347// Return true if 'ref' is found in array[]
348static bool find(SkPixelRef const * const * array, SkPixelRef const * ref, int count) {
349    return find_index<const SkPixelRef*>(array, ref, count) >= 0;
350}
351
352// Look at each pixel that is inside 'subset', and if its color appears in
353// colors[], find the corresponding value in refs[] and append that ref into
354// array, skipping duplicates of the same value.
355// Note that gathering pixelRefs from rendered colors suffers from the problem
356// that multiple simultaneous textures (e.g., A8 for alpha and 8888 for color)
357// isn't easy to reconstruct.
358static void gather_from_image(const SkBitmap& bm, SkPixelRef* const refs[],
359                              int count, SkTDArray<SkPixelRef*>* array,
360                              const SkRect& subset) {
361    SkIRect ir;
362    subset.roundOut(&ir);
363
364    if (!ir.intersect(0, 0, bm.width()-1, bm.height()-1)) {
365        return;
366    }
367
368    // Since we only want to return unique values in array, when we scan we just
369    // set a bit for each index'd color found. In practice we only have a few
370    // distinct colors, so we just use an int's bits as our array. Hence the
371    // assert that count <= number-of-bits-in-our-int.
372    SkASSERT((unsigned)count <= 32);
373    uint32_t bitarray = 0;
374
375    SkAutoLockPixels alp(bm);
376
377    for (int y = ir.fTop; y < ir.fBottom; ++y) {
378        for (int x = ir.fLeft; x < ir.fRight; ++x) {
379            SkPMColor pmc = *bm.getAddr32(x, y);
380            // the only good case where the color is not found would be if
381            // the color is transparent, meaning no bitmap was drawn in that
382            // pixel.
383            if (pmc) {
384                uint32_t index = SkGetPackedR32(pmc);
385                SkASSERT(SkGetPackedG32(pmc) == index);
386                SkASSERT(SkGetPackedB32(pmc) == index);
387                if (0 == index) {
388                    continue;           // background color
389                }
390                SkASSERT(0 == (index - gColorOffset) % gColorScale);
391                index = (index - gColorOffset) / gColorScale;
392                SkASSERT(static_cast<int>(index) < count);
393                bitarray |= 1 << index;
394            }
395        }
396    }
397
398    for (int i = 0; i < count; ++i) {
399        if (bitarray & (1 << i)) {
400            *array->append() = refs[i];
401        }
402    }
403}
404
405static void gather_from_analytic(const SkPoint pos[], SkScalar w, SkScalar h,
406                                 const SkTDArray<SkPixelRef*> analytic[],
407                                 int count,
408                                 SkTDArray<SkPixelRef*>* result,
409                                 const SkRect& subset) {
410    for (int i = 0; i < count; ++i) {
411        SkRect rect = SkRect::MakeXYWH(pos[i].fX, pos[i].fY, w, h);
412
413        if (SkRect::Intersects(subset, rect)) {
414            result->append(analytic[i].count(), analytic[i].begin());
415        }
416    }
417}
418
419
420static const struct {
421    const DrawBitmapProc proc;
422    const char* const desc;
423} gProcs[] = {
424    {drawpaint_proc, "drawpaint"},
425    {drawpoints_proc, "drawpoints"},
426    {drawrect_proc, "drawrect"},
427    {drawoval_proc, "drawoval"},
428    {drawrrect_proc, "drawrrect"},
429    {drawpath_proc, "drawpath"},
430    {drawbitmap_proc, "drawbitmap"},
431    {drawbitmap_withshader_proc, "drawbitmap_withshader"},
432    {drawsprite_proc, "drawsprite"},
433#if 0
434    {drawsprite_withshader_proc, "drawsprite_withshader"},
435#endif
436    {drawbitmaprect_proc, "drawbitmaprect"},
437    {drawbitmaprect_withshader_proc, "drawbitmaprect_withshader"},
438    {drawtext_proc, "drawtext"},
439    {drawpostext_proc, "drawpostext"},
440    {drawtextonpath_proc, "drawtextonpath"},
441    {drawverts_proc, "drawverts"},
442};
443
444static void create_textures(SkBitmap* bm, SkPixelRef** refs, int num, int w, int h) {
445    // Our convention is that the color components contain an encoding of
446    // the index of their corresponding bitmap/pixelref. (0,0,0,0) is
447    // reserved for the background
448    for (int i = 0; i < num; ++i) {
449        make_bm(&bm[i], w, h,
450                SkColorSetARGB(0xFF,
451                               gColorScale*i+gColorOffset,
452                               gColorScale*i+gColorOffset,
453                               gColorScale*i+gColorOffset),
454                true);
455        refs[i] = bm[i].pixelRef();
456    }
457
458    // The A8 alternate bitmaps are all BW checkerboards
459    for (int i = 0; i < num; ++i) {
460        make_checkerboard(&bm[num+i], w, h, true);
461        refs[num+i] = bm[num+i].pixelRef();
462    }
463}
464
465static void test_gatherpixelrefs(skiatest::Reporter* reporter) {
466    const int IW = 32;
467    const int IH = IW;
468    const SkScalar W = SkIntToScalar(IW);
469    const SkScalar H = W;
470
471    static const int N = 4;
472    SkBitmap bm[2*N];
473    SkPixelRef* refs[2*N];
474    SkTDArray<SkPixelRef*> analytic[N];
475
476    const SkPoint pos[N] = {
477        { 0, 0 }, { W, 0 }, { 0, H }, { W, H }
478    };
479
480    create_textures(bm, refs, N, IW, IH);
481
482    SkRandom rand;
483    for (size_t k = 0; k < SK_ARRAY_COUNT(gProcs); ++k) {
484        SkAutoTUnref<SkPicture> pic(
485            record_bitmaps(bm, pos, analytic, N, gProcs[k].proc));
486
487        REPORTER_ASSERT(reporter, pic->willPlayBackBitmaps() || N == 0);
488        // quick check for a small piece of each quadrant, which should just
489        // contain 1 or 2 bitmaps.
490        for (size_t  i = 0; i < SK_ARRAY_COUNT(pos); ++i) {
491            SkRect r;
492            r.set(2, 2, W - 2, H - 2);
493            r.offset(pos[i].fX, pos[i].fY);
494            SkAutoDataUnref data(SkPictureUtils::GatherPixelRefs(pic, r));
495            if (!data) {
496                ERRORF(reporter, "SkPictureUtils::GatherPixelRefs returned "
497                       "NULL for %s.", gProcs[k].desc);
498                continue;
499            }
500            SkPixelRef** gatheredRefs = (SkPixelRef**)data->data();
501            int count = static_cast<int>(data->size() / sizeof(SkPixelRef*));
502            REPORTER_ASSERT(reporter, 1 == count || 2 == count);
503            if (1 == count) {
504                REPORTER_ASSERT(reporter, gatheredRefs[0] == refs[i]);
505            } else if (2 == count) {
506                REPORTER_ASSERT(reporter,
507                    (gatheredRefs[0] == refs[i] && gatheredRefs[1] == refs[i+N]) ||
508                    (gatheredRefs[1] == refs[i] && gatheredRefs[0] == refs[i+N]));
509            }
510        }
511
512        SkBitmap image;
513        draw(pic, 2*IW, 2*IH, &image);
514
515        // Test a bunch of random (mostly) rects, and compare the gather results
516        // with a deduced list of refs by looking at the colors drawn.
517        for (int j = 0; j < 100; ++j) {
518            SkRect r;
519            rand_rect(&r, rand, 2*W, 2*H);
520
521            SkTDArray<SkPixelRef*> fromImage;
522            gather_from_image(image, refs, N, &fromImage, r);
523
524            SkTDArray<SkPixelRef*> fromAnalytic;
525            gather_from_analytic(pos, W, H, analytic, N, &fromAnalytic, r);
526
527            SkData* data = SkPictureUtils::GatherPixelRefs(pic, r);
528            size_t dataSize = data ? data->size() : 0;
529            int gatherCount = static_cast<int>(dataSize / sizeof(SkPixelRef*));
530            SkASSERT(gatherCount * sizeof(SkPixelRef*) == dataSize);
531            SkPixelRef** gatherRefs = data ? (SkPixelRef**)(data->data()) : NULL;
532            SkAutoDataUnref adu(data);
533
534            // Everything that we saw drawn should appear in the analytic list
535            // but the analytic list may contain some pixelRefs that were not
536            // seen in the image (e.g., A8 textures used as masks)
537            for (int i = 0; i < fromImage.count(); ++i) {
538                if (-1 == fromAnalytic.find(fromImage[i])) {
539                    ERRORF(reporter, "PixelRef missing %d %s",
540                           i, gProcs[k].desc);
541                }
542            }
543
544            /*
545             *  GatherPixelRefs is conservative, so it can return more bitmaps
546             *  than are strictly required. Thus our check here is only that
547             *  Gather didn't miss any that we actually needed. Even that isn't
548             *  a strict requirement on Gather, which is meant to be quick and
549             *  only mostly-correct, but at the moment this test should work.
550             */
551            for (int i = 0; i < fromAnalytic.count(); ++i) {
552                bool found = find(gatherRefs, fromAnalytic[i], gatherCount);
553                if (!found) {
554                    ERRORF(reporter, "PixelRef missing %d %s",
555                           i, gProcs[k].desc);
556                }
557#if 0
558                // enable this block of code to debug failures, as it will rerun
559                // the case that failed.
560                if (!found) {
561                    SkData* data = SkPictureUtils::GatherPixelRefs(pic, r);
562                    size_t dataSize = data ? data->size() : 0;
563                }
564#endif
565            }
566        }
567    }
568}
569
570static void test_gatherpixelrefsandrects(skiatest::Reporter* reporter) {
571    const int IW = 32;
572    const int IH = IW;
573    const SkScalar W = SkIntToScalar(IW);
574    const SkScalar H = W;
575
576    static const int N = 4;
577    SkBitmap bm[2*N];
578    SkPixelRef* refs[2*N];
579    SkTDArray<SkPixelRef*> analytic[N];
580
581    const SkPoint pos[N] = {
582        { 0, 0 }, { W, 0 }, { 0, H }, { W, H }
583    };
584
585    create_textures(bm, refs, N, IW, IH);
586
587    SkRandom rand;
588    for (size_t k = 0; k < SK_ARRAY_COUNT(gProcs); ++k) {
589        SkAutoTUnref<SkPicture> pic(
590            record_bitmaps(bm, pos, analytic, N, gProcs[k].proc));
591
592        REPORTER_ASSERT(reporter, pic->willPlayBackBitmaps() || N == 0);
593
594        SkAutoTUnref<SkPictureUtils::SkPixelRefContainer> prCont(
595                                new SkPictureUtils::SkPixelRefsAndRectsList);
596
597        SkPictureUtils::GatherPixelRefsAndRects(pic, prCont);
598
599        // quick check for a small piece of each quadrant, which should just
600        // contain 1 or 2 bitmaps.
601        for (size_t  i = 0; i < SK_ARRAY_COUNT(pos); ++i) {
602            SkRect r;
603            r.set(2, 2, W - 2, H - 2);
604            r.offset(pos[i].fX, pos[i].fY);
605
606            SkTDArray<SkPixelRef*> gatheredRefs;
607            prCont->query(r, &gatheredRefs);
608
609            int count = gatheredRefs.count();
610            REPORTER_ASSERT(reporter, 1 == count || 2 == count);
611            if (1 == count) {
612                REPORTER_ASSERT(reporter, gatheredRefs[0] == refs[i]);
613            } else if (2 == count) {
614                REPORTER_ASSERT(reporter,
615                    (gatheredRefs[0] == refs[i] && gatheredRefs[1] == refs[i+N]) ||
616                    (gatheredRefs[1] == refs[i] && gatheredRefs[0] == refs[i+N]));
617            }
618        }
619
620        SkBitmap image;
621        draw(pic, 2*IW, 2*IH, &image);
622
623        // Test a bunch of random (mostly) rects, and compare the gather results
624        // with the analytic results and the pixel refs seen in a rendering.
625        for (int j = 0; j < 100; ++j) {
626            SkRect r;
627            rand_rect(&r, rand, 2*W, 2*H);
628
629            SkTDArray<SkPixelRef*> fromImage;
630            gather_from_image(image, refs, N, &fromImage, r);
631
632            SkTDArray<SkPixelRef*> fromAnalytic;
633            gather_from_analytic(pos, W, H, analytic, N, &fromAnalytic, r);
634
635            SkTDArray<SkPixelRef*> gatheredRefs;
636            prCont->query(r, &gatheredRefs);
637
638            // Everything that we saw drawn should appear in the analytic list
639            // but the analytic list may contain some pixelRefs that were not
640            // seen in the image (e.g., A8 textures used as masks)
641            for (int i = 0; i < fromImage.count(); ++i) {
642                REPORTER_ASSERT(reporter, -1 != fromAnalytic.find(fromImage[i]));
643            }
644
645            // Everything in the analytic list should appear in the gathered
646            // list.
647            for (int i = 0; i < fromAnalytic.count(); ++i) {
648                REPORTER_ASSERT(reporter, -1 != gatheredRefs.find(fromAnalytic[i]));
649            }
650        }
651    }
652}
653
654#ifdef SK_DEBUG
655// Ensure that deleting SkPicturePlayback does not assert. Asserts only fire in debug mode, so only
656// run in debug mode.
657static void test_deleting_empty_playback() {
658    SkPicture picture;
659    // Creates an SkPictureRecord
660    picture.beginRecording(0, 0);
661    // Turns that into an SkPicturePlayback
662    picture.endRecording();
663    // Deletes the old SkPicturePlayback, and creates a new SkPictureRecord
664    picture.beginRecording(0, 0);
665}
666
667// Ensure that serializing an empty picture does not assert. Likewise only runs in debug mode.
668static void test_serializing_empty_picture() {
669    SkPicture picture;
670    picture.beginRecording(0, 0);
671    picture.endRecording();
672    SkDynamicMemoryWStream stream;
673    picture.serialize(&stream);
674}
675#endif
676
677static void rand_op(SkCanvas* canvas, SkRandom& rand) {
678    SkPaint paint;
679    SkRect rect = SkRect::MakeWH(50, 50);
680
681    SkScalar unit = rand.nextUScalar1();
682    if (unit <= 0.3) {
683//        SkDebugf("save\n");
684        canvas->save();
685    } else if (unit <= 0.6) {
686//        SkDebugf("restore\n");
687        canvas->restore();
688    } else if (unit <= 0.9) {
689//        SkDebugf("clip\n");
690        canvas->clipRect(rect);
691    } else {
692//        SkDebugf("draw\n");
693        canvas->drawPaint(paint);
694    }
695}
696
697static void set_canvas_to_save_count_4(SkCanvas* canvas) {
698    canvas->restoreToCount(1);
699    canvas->save();
700    canvas->save();
701    canvas->save();
702}
703
704static void test_unbalanced_save_restores(skiatest::Reporter* reporter) {
705    SkCanvas testCanvas(100, 100);
706    set_canvas_to_save_count_4(&testCanvas);
707
708    REPORTER_ASSERT(reporter, 4 == testCanvas.getSaveCount());
709
710    SkPaint paint;
711    SkRect rect = SkRect::MakeLTRB(-10000000, -10000000, 10000000, 10000000);
712
713    SkPicture extra_save_picture;
714    extra_save_picture.beginRecording(100, 100);
715    extra_save_picture.getRecordingCanvas()->save();
716    extra_save_picture.getRecordingCanvas()->translate(10, 10);
717    extra_save_picture.getRecordingCanvas()->drawRect(rect, paint);
718    extra_save_picture.getRecordingCanvas()->save();
719    extra_save_picture.getRecordingCanvas()->translate(10, 10);
720    extra_save_picture.getRecordingCanvas()->drawRect(rect, paint);
721
722    testCanvas.drawPicture(extra_save_picture);
723    REPORTER_ASSERT(reporter, 4 == testCanvas.getSaveCount());
724
725    set_canvas_to_save_count_4(&testCanvas);
726
727    SkPicture extra_restore_picture;
728    extra_restore_picture.beginRecording(100, 100);
729    extra_restore_picture.getRecordingCanvas()->save();
730    extra_restore_picture.getRecordingCanvas()->translate(10, 10);
731    extra_restore_picture.getRecordingCanvas()->drawRect(rect, paint);
732    extra_restore_picture.getRecordingCanvas()->save();
733    extra_restore_picture.getRecordingCanvas()->translate(10, 10);
734    extra_restore_picture.getRecordingCanvas()->drawRect(rect, paint);
735    extra_restore_picture.getRecordingCanvas()->restore();
736    extra_restore_picture.getRecordingCanvas()->restore();
737    extra_restore_picture.getRecordingCanvas()->restore();
738    extra_restore_picture.getRecordingCanvas()->restore();
739
740    testCanvas.drawPicture(extra_save_picture);
741    REPORTER_ASSERT(reporter, 4 == testCanvas.getSaveCount());
742
743    SkPicture no_save_picture;
744    extra_restore_picture.beginRecording(100, 100);
745    extra_restore_picture.getRecordingCanvas()->translate(10, 10);
746    extra_restore_picture.getRecordingCanvas()->drawRect(rect, paint);
747
748    testCanvas.drawPicture(extra_save_picture);
749    REPORTER_ASSERT(reporter, 4 == testCanvas.getSaveCount());
750    REPORTER_ASSERT(reporter, testCanvas.getTotalMatrix().isIdentity());
751}
752
753static void test_peephole() {
754    SkRandom rand;
755
756    for (int j = 0; j < 100; j++) {
757        SkRandom rand2(rand); // remember the seed
758
759        SkPicture picture;
760        SkCanvas* canvas = picture.beginRecording(100, 100);
761
762        for (int i = 0; i < 1000; ++i) {
763            rand_op(canvas, rand);
764        }
765        picture.endRecording();
766
767        rand = rand2;
768    }
769
770    {
771        SkPicture picture;
772        SkCanvas* canvas = picture.beginRecording(100, 100);
773        SkRect rect = SkRect::MakeWH(50, 50);
774
775        for (int i = 0; i < 100; ++i) {
776            canvas->save();
777        }
778        while (canvas->getSaveCount() > 1) {
779            canvas->clipRect(rect);
780            canvas->restore();
781        }
782        picture.endRecording();
783    }
784}
785
786#ifndef SK_DEBUG
787// Only test this is in release mode. We deliberately crash in debug mode, since a valid caller
788// should never do this.
789static void test_bad_bitmap() {
790    // This bitmap has a width and height but no pixels. As a result, attempting to record it will
791    // fail.
792    SkBitmap bm;
793    bm.setConfig(SkImageInfo::MakeN32Premul(100, 100));
794    SkPicture picture;
795    SkCanvas* recordingCanvas = picture.beginRecording(100, 100);
796    recordingCanvas->drawBitmap(bm, 0, 0);
797    picture.endRecording();
798
799    SkCanvas canvas;
800    canvas.drawPicture(picture);
801}
802#endif
803
804static SkData* encode_bitmap_to_data(size_t*, const SkBitmap& bm) {
805    return SkImageEncoder::EncodeData(bm, SkImageEncoder::kPNG_Type, 100);
806}
807
808static SkData* serialized_picture_from_bitmap(const SkBitmap& bitmap) {
809    SkPicture picture;
810    SkCanvas* canvas = picture.beginRecording(bitmap.width(), bitmap.height());
811    canvas->drawBitmap(bitmap, 0, 0);
812    SkDynamicMemoryWStream wStream;
813    picture.serialize(&wStream, &encode_bitmap_to_data);
814    return wStream.copyToData();
815}
816
817struct ErrorContext {
818    int fErrors;
819    skiatest::Reporter* fReporter;
820};
821
822static void assert_one_parse_error_cb(SkError error, void* context) {
823    ErrorContext* errorContext = static_cast<ErrorContext*>(context);
824    errorContext->fErrors++;
825    // This test only expects one error, and that is a kParseError. If there are others,
826    // there is some unknown problem.
827    REPORTER_ASSERT_MESSAGE(errorContext->fReporter, 1 == errorContext->fErrors,
828                            "This threw more errors than expected.");
829    REPORTER_ASSERT_MESSAGE(errorContext->fReporter, kParseError_SkError == error,
830                            SkGetLastErrorString());
831}
832
833static void test_bitmap_with_encoded_data(skiatest::Reporter* reporter) {
834    // Create a bitmap that will be encoded.
835    SkBitmap original;
836    make_bm(&original, 100, 100, SK_ColorBLUE, true);
837    SkDynamicMemoryWStream wStream;
838    if (!SkImageEncoder::EncodeStream(&wStream, original, SkImageEncoder::kPNG_Type, 100)) {
839        return;
840    }
841    SkAutoDataUnref data(wStream.copyToData());
842
843    SkBitmap bm;
844    bool installSuccess = SkInstallDiscardablePixelRef(
845         SkDecodingImageGenerator::Create(data, SkDecodingImageGenerator::Options()), &bm, NULL);
846    REPORTER_ASSERT(reporter, installSuccess);
847
848    // Write both bitmaps to pictures, and ensure that the resulting data streams are the same.
849    // Flattening original will follow the old path of performing an encode, while flattening bm
850    // will use the already encoded data.
851    SkAutoDataUnref picture1(serialized_picture_from_bitmap(original));
852    SkAutoDataUnref picture2(serialized_picture_from_bitmap(bm));
853    REPORTER_ASSERT(reporter, picture1->equals(picture2));
854    // Now test that a parse error was generated when trying to create a new SkPicture without
855    // providing a function to decode the bitmap.
856    ErrorContext context;
857    context.fErrors = 0;
858    context.fReporter = reporter;
859    SkSetErrorCallback(assert_one_parse_error_cb, &context);
860    SkMemoryStream pictureStream(picture1);
861    SkClearLastError();
862    SkAutoUnref pictureFromStream(SkPicture::CreateFromStream(&pictureStream, NULL));
863    REPORTER_ASSERT(reporter, pictureFromStream.get() != NULL);
864    SkClearLastError();
865    SkSetErrorCallback(NULL, NULL);
866}
867
868static void test_clone_empty(skiatest::Reporter* reporter) {
869    // This is a regression test for crbug.com/172062
870    // Before the fix, we used to crash accessing a null pointer when we
871    // had a picture with no paints. This test passes by not crashing.
872    {
873        SkPicture picture;
874        picture.beginRecording(1, 1);
875        picture.endRecording();
876        SkPicture* destPicture = picture.clone();
877        REPORTER_ASSERT(reporter, NULL != destPicture);
878        destPicture->unref();
879    }
880    {
881        // Test without call to endRecording
882        SkPicture picture;
883        picture.beginRecording(1, 1);
884        SkPicture* destPicture = picture.clone();
885        REPORTER_ASSERT(reporter, NULL != destPicture);
886        destPicture->unref();
887    }
888}
889
890static void test_clip_bound_opt(skiatest::Reporter* reporter) {
891    // Test for crbug.com/229011
892    SkRect rect1 = SkRect::MakeXYWH(SkIntToScalar(4), SkIntToScalar(4),
893                                    SkIntToScalar(2), SkIntToScalar(2));
894    SkRect rect2 = SkRect::MakeXYWH(SkIntToScalar(7), SkIntToScalar(7),
895                                    SkIntToScalar(1), SkIntToScalar(1));
896    SkRect rect3 = SkRect::MakeXYWH(SkIntToScalar(6), SkIntToScalar(6),
897                                    SkIntToScalar(1), SkIntToScalar(1));
898
899    SkPath invPath;
900    invPath.addOval(rect1);
901    invPath.setFillType(SkPath::kInverseEvenOdd_FillType);
902    SkPath path;
903    path.addOval(rect2);
904    SkPath path2;
905    path2.addOval(rect3);
906    SkIRect clipBounds;
907    // Minimalist test set for 100% code coverage of
908    // SkPictureRecord::updateClipConservativelyUsingBounds
909    {
910        SkPicture picture;
911        SkCanvas* canvas = picture.beginRecording(10, 10,
912            SkPicture::kUsePathBoundsForClip_RecordingFlag);
913        canvas->clipPath(invPath, SkRegion::kIntersect_Op);
914        bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
915        REPORTER_ASSERT(reporter, true == nonEmpty);
916        REPORTER_ASSERT(reporter, 0 == clipBounds.fLeft);
917        REPORTER_ASSERT(reporter, 0 == clipBounds.fTop);
918        REPORTER_ASSERT(reporter, 10 == clipBounds.fBottom);
919        REPORTER_ASSERT(reporter, 10 == clipBounds.fRight);
920    }
921    {
922        SkPicture picture;
923        SkCanvas* canvas = picture.beginRecording(10, 10,
924            SkPicture::kUsePathBoundsForClip_RecordingFlag);
925        canvas->clipPath(path, SkRegion::kIntersect_Op);
926        canvas->clipPath(invPath, SkRegion::kIntersect_Op);
927        bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
928        REPORTER_ASSERT(reporter, true == nonEmpty);
929        REPORTER_ASSERT(reporter, 7 == clipBounds.fLeft);
930        REPORTER_ASSERT(reporter, 7 == clipBounds.fTop);
931        REPORTER_ASSERT(reporter, 8 == clipBounds.fBottom);
932        REPORTER_ASSERT(reporter, 8 == clipBounds.fRight);
933    }
934    {
935        SkPicture picture;
936        SkCanvas* canvas = picture.beginRecording(10, 10,
937            SkPicture::kUsePathBoundsForClip_RecordingFlag);
938        canvas->clipPath(path, SkRegion::kIntersect_Op);
939        canvas->clipPath(invPath, SkRegion::kUnion_Op);
940        bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
941        REPORTER_ASSERT(reporter, true == nonEmpty);
942        REPORTER_ASSERT(reporter, 0 == clipBounds.fLeft);
943        REPORTER_ASSERT(reporter, 0 == clipBounds.fTop);
944        REPORTER_ASSERT(reporter, 10 == clipBounds.fBottom);
945        REPORTER_ASSERT(reporter, 10 == clipBounds.fRight);
946    }
947    {
948        SkPicture picture;
949        SkCanvas* canvas = picture.beginRecording(10, 10,
950            SkPicture::kUsePathBoundsForClip_RecordingFlag);
951        canvas->clipPath(path, SkRegion::kDifference_Op);
952        bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
953        REPORTER_ASSERT(reporter, true == nonEmpty);
954        REPORTER_ASSERT(reporter, 0 == clipBounds.fLeft);
955        REPORTER_ASSERT(reporter, 0 == clipBounds.fTop);
956        REPORTER_ASSERT(reporter, 10 == clipBounds.fBottom);
957        REPORTER_ASSERT(reporter, 10 == clipBounds.fRight);
958    }
959    {
960        SkPicture picture;
961        SkCanvas* canvas = picture.beginRecording(10, 10,
962            SkPicture::kUsePathBoundsForClip_RecordingFlag);
963        canvas->clipPath(path, SkRegion::kReverseDifference_Op);
964        bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
965        // True clip is actually empty in this case, but the best
966        // determination we can make using only bounds as input is that the
967        // clip is included in the bounds of 'path'.
968        REPORTER_ASSERT(reporter, true == nonEmpty);
969        REPORTER_ASSERT(reporter, 7 == clipBounds.fLeft);
970        REPORTER_ASSERT(reporter, 7 == clipBounds.fTop);
971        REPORTER_ASSERT(reporter, 8 == clipBounds.fBottom);
972        REPORTER_ASSERT(reporter, 8 == clipBounds.fRight);
973    }
974    {
975        SkPicture picture;
976        SkCanvas* canvas = picture.beginRecording(10, 10,
977            SkPicture::kUsePathBoundsForClip_RecordingFlag);
978        canvas->clipPath(path, SkRegion::kIntersect_Op);
979        canvas->clipPath(path2, SkRegion::kXOR_Op);
980        bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
981        REPORTER_ASSERT(reporter, true == nonEmpty);
982        REPORTER_ASSERT(reporter, 6 == clipBounds.fLeft);
983        REPORTER_ASSERT(reporter, 6 == clipBounds.fTop);
984        REPORTER_ASSERT(reporter, 8 == clipBounds.fBottom);
985        REPORTER_ASSERT(reporter, 8 == clipBounds.fRight);
986    }
987}
988
989/**
990 * A canvas that records the number of clip commands.
991 */
992class ClipCountingCanvas : public SkCanvas {
993public:
994    explicit ClipCountingCanvas(int width, int height)
995        : INHERITED(width, height)
996        , fClipCount(0){
997    }
998
999    virtual void onClipRect(const SkRect& r,
1000                            SkRegion::Op op,
1001                            ClipEdgeStyle edgeStyle) SK_OVERRIDE {
1002        fClipCount += 1;
1003        this->INHERITED::onClipRect(r, op, edgeStyle);
1004    }
1005
1006    virtual void onClipRRect(const SkRRect& rrect,
1007                             SkRegion::Op op,
1008                             ClipEdgeStyle edgeStyle)SK_OVERRIDE {
1009        fClipCount += 1;
1010        this->INHERITED::onClipRRect(rrect, op, edgeStyle);
1011    }
1012
1013    virtual void onClipPath(const SkPath& path,
1014                            SkRegion::Op op,
1015                            ClipEdgeStyle edgeStyle) SK_OVERRIDE {
1016        fClipCount += 1;
1017        this->INHERITED::onClipPath(path, op, edgeStyle);
1018    }
1019
1020    virtual void onClipRegion(const SkRegion& deviceRgn, SkRegion::Op op) SK_OVERRIDE {
1021        fClipCount += 1;
1022        this->INHERITED::onClipRegion(deviceRgn, op);
1023    }
1024
1025    unsigned getClipCount() const { return fClipCount; }
1026
1027private:
1028    unsigned fClipCount;
1029
1030    typedef SkCanvas INHERITED;
1031};
1032
1033static void test_clip_expansion(skiatest::Reporter* reporter) {
1034    SkPicture picture;
1035    SkCanvas* canvas = picture.beginRecording(10, 10, 0);
1036
1037    canvas->clipRect(SkRect::MakeEmpty(), SkRegion::kReplace_Op);
1038    // The following expanding clip should not be skipped.
1039    canvas->clipRect(SkRect::MakeXYWH(4, 4, 3, 3), SkRegion::kUnion_Op);
1040    // Draw something so the optimizer doesn't just fold the world.
1041    SkPaint p;
1042    p.setColor(SK_ColorBLUE);
1043    canvas->drawPaint(p);
1044
1045    ClipCountingCanvas testCanvas(10, 10);
1046    picture.draw(&testCanvas);
1047
1048    // Both clips should be present on playback.
1049    REPORTER_ASSERT(reporter, testCanvas.getClipCount() == 2);
1050}
1051
1052static void test_hierarchical(skiatest::Reporter* reporter) {
1053    SkBitmap bm;
1054    make_bm(&bm, 10, 10, SK_ColorRED, true);
1055
1056    SkCanvas* canvas;
1057
1058    SkPicture childPlain;
1059    childPlain.beginRecording(10, 10);
1060    childPlain.endRecording();
1061    REPORTER_ASSERT(reporter, !childPlain.willPlayBackBitmaps()); // 0
1062
1063    SkPicture childWithBitmap;
1064    childWithBitmap.beginRecording(10, 10)->drawBitmap(bm, 0, 0);
1065    childWithBitmap.endRecording();
1066    REPORTER_ASSERT(reporter, childWithBitmap.willPlayBackBitmaps()); // 1
1067
1068    SkPicture parentPP;
1069    canvas = parentPP.beginRecording(10, 10);
1070    canvas->drawPicture(childPlain);
1071    parentPP.endRecording();
1072    REPORTER_ASSERT(reporter, !parentPP.willPlayBackBitmaps()); // 0
1073
1074    SkPicture parentPWB;
1075    canvas = parentPWB.beginRecording(10, 10);
1076    canvas->drawPicture(childWithBitmap);
1077    parentPWB.endRecording();
1078    REPORTER_ASSERT(reporter, parentPWB.willPlayBackBitmaps()); // 1
1079
1080    SkPicture parentWBP;
1081    canvas = parentWBP.beginRecording(10, 10);
1082    canvas->drawBitmap(bm, 0, 0);
1083    canvas->drawPicture(childPlain);
1084    parentWBP.endRecording();
1085    REPORTER_ASSERT(reporter, parentWBP.willPlayBackBitmaps()); // 1
1086
1087    SkPicture parentWBWB;
1088    canvas = parentWBWB.beginRecording(10, 10);
1089    canvas->drawBitmap(bm, 0, 0);
1090    canvas->drawPicture(childWithBitmap);
1091    parentWBWB.endRecording();
1092    REPORTER_ASSERT(reporter, parentWBWB.willPlayBackBitmaps()); // 2
1093}
1094
1095DEF_TEST(Picture, reporter) {
1096#ifdef SK_DEBUG
1097    test_deleting_empty_playback();
1098    test_serializing_empty_picture();
1099#else
1100    test_bad_bitmap();
1101#endif
1102    test_unbalanced_save_restores(reporter);
1103    test_peephole();
1104    test_gatherpixelrefs(reporter);
1105    test_gatherpixelrefsandrects(reporter);
1106    test_bitmap_with_encoded_data(reporter);
1107    test_clone_empty(reporter);
1108    test_clip_bound_opt(reporter);
1109    test_clip_expansion(reporter);
1110    test_hierarchical(reporter);
1111}
1112
1113static void draw_bitmaps(const SkBitmap bitmap, SkCanvas* canvas) {
1114    const SkPaint paint;
1115    const SkRect rect = { 5.0f, 5.0f, 8.0f, 8.0f };
1116    const SkIRect irect =  { 2, 2, 3, 3 };
1117
1118    // Don't care what these record, as long as they're legal.
1119    canvas->drawBitmap(bitmap, 0.0f, 0.0f, &paint);
1120    canvas->drawBitmapRectToRect(bitmap, &rect, rect, &paint, SkCanvas::kNone_DrawBitmapRectFlag);
1121    canvas->drawBitmapMatrix(bitmap, SkMatrix::I(), &paint);
1122    canvas->drawBitmapNine(bitmap, irect, rect, &paint);
1123    canvas->drawSprite(bitmap, 1, 1);
1124}
1125
1126static void test_draw_bitmaps(SkCanvas* canvas) {
1127    SkBitmap empty;
1128    draw_bitmaps(empty, canvas);
1129    empty.setConfig(SkImageInfo::MakeN32Premul(10, 10));
1130    draw_bitmaps(empty, canvas);
1131}
1132
1133DEF_TEST(Picture_EmptyBitmap, r) {
1134    SkPicture picture;
1135    test_draw_bitmaps(picture.beginRecording(10, 10));
1136    picture.endRecording();
1137}
1138
1139DEF_TEST(Canvas_EmptyBitmap, r) {
1140    SkBitmap dst;
1141    dst.allocN32Pixels(10, 10);
1142    SkCanvas canvas(dst);
1143
1144    test_draw_bitmaps(&canvas);
1145}
1146