TextBlobCacheTest.cpp revision 1530283c483cb88aa725bce50a6d193dd00ee570 
1/*
2 * Copyright 2015 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 "sk_tool_utils.h"
9
10#include "SkCanvas.h"
11#include "SkPaint.h"
12#include "SkPoint.h"
13#include "SkTextBlob.h"
14#include "SkFontMgr.h"
15#include "SkGraphics.h"
16#include "SkSurface.h"
17#include "SkTypeface.h"
18#include "../src/fonts/SkRandomScalerContext.h"
19
20#ifdef SK_BUILD_FOR_WIN
21    #include "SkTypeface_win.h"
22#endif
23
24#include "Test.h"
25
26#if SK_SUPPORT_GPU
27#include "GrContext.h"
28#include "GrTest.h"
29
30struct TextBlobWrapper {
31    // This class assumes it 'owns' the textblob it wraps, and thus does not need to take a ref
32    explicit TextBlobWrapper(const SkTextBlob* blob) : fBlob(blob) {}
33    TextBlobWrapper(const TextBlobWrapper& blob) : fBlob(SkRef(blob.fBlob.get())) {}
34
35    SkAutoTUnref<const SkTextBlob> fBlob;
36};
37
38static void draw(SkCanvas* canvas, int redraw, const SkTArray<TextBlobWrapper>& blobs) {
39    int yOffset = 0;
40    for (int r = 0; r < redraw; r++) {
41        for (int i = 0; i < blobs.count(); i++) {
42            const SkTextBlob* blob = blobs[i].fBlob.get();
43            const SkRect& bounds = blob->bounds();
44            yOffset += SkScalarCeilToInt(bounds.height());
45            SkPaint paint;
46            canvas->drawTextBlob(blob, 0, SkIntToScalar(yOffset), paint);
47        }
48    }
49}
50
51static const int kWidth = 1024;
52static const int kHeight = 768;
53
54// This test hammers the GPU textblobcache and font atlas
55static void text_blob_cache_inner(skiatest::Reporter* reporter, GrContext* context,
56                                  int maxTotalText, int maxGlyphID, int maxFamilies, bool normal,
57                                  bool stressTest) {
58    // setup surface
59    uint32_t flags = 0;
60    SkSurfaceProps props(flags, SkSurfaceProps::kLegacyFontHost_InitType);
61
62    // configure our context for maximum stressing of cache and atlas
63    if (stressTest) {
64        GrTest::SetupAlwaysEvictAtlas(context);
65        context->setTextBlobCacheLimit_ForTesting(0);
66    }
67
68    SkImageInfo info = SkImageInfo::Make(kWidth, kHeight, kN32_SkColorType, kPremul_SkAlphaType);
69    SkAutoTUnref<SkSurface> surface(SkSurface::NewRenderTarget(context, SkSurface::kNo_Budgeted, info,
70                                                               0, &props));
71    REPORTER_ASSERT(reporter, surface);
72    if (!surface) {
73        return;
74    }
75
76    SkCanvas* canvas = surface->getCanvas();
77
78    SkAutoTUnref<SkFontMgr> fm(SkFontMgr::RefDefault());
79
80    int count = SkMin32(fm->countFamilies(), maxFamilies);
81
82    // make a ton of text
83    SkAutoTArray<uint16_t> text(maxTotalText);
84    for (int i = 0; i < maxTotalText; i++) {
85        text[i] = i % maxGlyphID;
86    }
87
88    // generate textblobs
89    SkTArray<TextBlobWrapper> blobs;
90    for (int i = 0; i < count; i++) {
91        SkPaint paint;
92        paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
93        paint.setTextSize(48); // draw big glyphs to really stress the atlas
94
95        SkString familyName;
96        fm->getFamilyName(i, &familyName);
97        SkAutoTUnref<SkFontStyleSet> set(fm->createStyleSet(i));
98        for (int j = 0; j < set->count(); ++j) {
99            SkFontStyle fs;
100            set->getStyle(j, &fs, nullptr);
101
102            // We use a typeface which randomy returns unexpected mask formats to fuzz
103            SkAutoTUnref<SkTypeface> orig(set->createTypeface(j));
104            if (normal) {
105                paint.setTypeface(orig);
106            } else {
107                SkAutoTUnref<SkTypeface> typeface(new SkRandomTypeface(orig, paint, true));
108                paint.setTypeface(typeface);
109            }
110
111            SkTextBlobBuilder builder;
112            for (int aa = 0; aa < 2; aa++) {
113                for (int subpixel = 0; subpixel < 2; subpixel++) {
114                    for (int lcd = 0; lcd < 2; lcd++) {
115                        paint.setAntiAlias(SkToBool(aa));
116                        paint.setSubpixelText(SkToBool(subpixel));
117                        paint.setLCDRenderText(SkToBool(lcd));
118                        if (!SkToBool(lcd)) {
119                            paint.setTextSize(160);
120                        }
121                        const SkTextBlobBuilder::RunBuffer& run = builder.allocRun(paint,
122                                                                                   maxTotalText,
123                                                                                   0, 0,
124                                                                                   nullptr);
125                        memcpy(run.glyphs, text.get(), maxTotalText * sizeof(uint16_t));
126                    }
127                }
128            }
129            SkNEW_APPEND_TO_TARRAY(&blobs, TextBlobWrapper, (builder.build()));
130        }
131    }
132
133    // create surface where LCD is impossible
134    info = SkImageInfo::MakeN32Premul(kWidth, kHeight);
135    SkSurfaceProps propsNoLCD(0, kUnknown_SkPixelGeometry);
136    SkAutoTUnref<SkSurface> surfaceNoLCD(canvas->newSurface(info, &propsNoLCD));
137    REPORTER_ASSERT(reporter, surface);
138    if (!surface) {
139        return;
140    }
141
142    SkCanvas* canvasNoLCD = surfaceNoLCD->getCanvas();
143
144    // test redraw
145    draw(canvas, 2, blobs);
146    draw(canvasNoLCD, 2, blobs);
147
148    // test draw after free
149    context->freeGpuResources();
150    draw(canvas, 1, blobs);
151
152    context->freeGpuResources();
153    draw(canvasNoLCD, 1, blobs);
154
155    // test draw after abandon
156    context->abandonContext();
157    draw(canvas, 1, blobs);
158}
159
160DEF_GPUTEST_FOR_NULL_CONTEXT(TextBlobCache, reporter, context) {
161    text_blob_cache_inner(reporter, context, 1024, 256, 30, true, false);
162}
163
164DEF_GPUTEST_FOR_NULL_CONTEXT(TextBlobStressCache, reporter, context) {
165    text_blob_cache_inner(reporter, context, 256, 256, 10, true, true);
166}
167
168DEF_GPUTEST_FOR_NULL_CONTEXT(TextBlobAbnormal, reporter, context) {
169    text_blob_cache_inner(reporter, context, 256, 256, 10, false, false);
170}
171
172DEF_GPUTEST_FOR_NULL_CONTEXT(TextBlobStressAbnormal, reporter, context) {
173    text_blob_cache_inner(reporter, context, 256, 256, 10, false, true);
174}
175#endif
176