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 "SkFontMgr.h"
12#include "SkGraphics.h"
13#include "SkPaint.h"
14#include "SkPoint.h"
15#include "SkRandomScalerContext.h"
16#include "SkSurface.h"
17#include "SkTextBlob.h"
18#include "SkTypeface.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
30static void draw(SkCanvas* canvas, int redraw, const SkTArray<sk_sp<SkTextBlob>>& blobs) {
31    int yOffset = 0;
32    for (int r = 0; r < redraw; r++) {
33        for (int i = 0; i < blobs.count(); i++) {
34            const auto& blob = blobs[i];
35            const SkRect& bounds = blob->bounds();
36            yOffset += SkScalarCeilToInt(bounds.height());
37            SkPaint paint;
38            canvas->drawTextBlob(blob, 0, SkIntToScalar(yOffset), paint);
39        }
40    }
41}
42
43static const int kWidth = 1024;
44static const int kHeight = 768;
45
46// This test hammers the GPU textblobcache and font atlas
47static void text_blob_cache_inner(skiatest::Reporter* reporter, GrContext* context,
48                                  int maxTotalText, int maxGlyphID, int maxFamilies, bool normal,
49                                  bool stressTest) {
50    // setup surface
51    uint32_t flags = 0;
52    SkSurfaceProps props(flags, SkSurfaceProps::kLegacyFontHost_InitType);
53
54    // configure our context for maximum stressing of cache and atlas
55    if (stressTest) {
56        GrTest::SetupAlwaysEvictAtlas(context);
57        context->setTextBlobCacheLimit_ForTesting(0);
58    }
59
60    SkImageInfo info = SkImageInfo::Make(kWidth, kHeight, kN32_SkColorType, kPremul_SkAlphaType);
61    auto surface(SkSurface::MakeRenderTarget(context, SkBudgeted::kNo, info, 0, &props));
62    REPORTER_ASSERT(reporter, surface);
63    if (!surface) {
64        return;
65    }
66
67    SkCanvas* canvas = surface->getCanvas();
68
69    sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault());
70
71    int count = SkMin32(fm->countFamilies(), maxFamilies);
72
73    // make a ton of text
74    SkAutoTArray<uint16_t> text(maxTotalText);
75    for (int i = 0; i < maxTotalText; i++) {
76        text[i] = i % maxGlyphID;
77    }
78
79    // generate textblobs
80    SkTArray<sk_sp<SkTextBlob>> blobs;
81    for (int i = 0; i < count; i++) {
82        SkPaint paint;
83        paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
84        paint.setTextSize(48); // draw big glyphs to really stress the atlas
85
86        SkString familyName;
87        fm->getFamilyName(i, &familyName);
88        sk_sp<SkFontStyleSet> set(fm->createStyleSet(i));
89        for (int j = 0; j < set->count(); ++j) {
90            SkFontStyle fs;
91            set->getStyle(j, &fs, nullptr);
92
93            // We use a typeface which randomy returns unexpected mask formats to fuzz
94            sk_sp<SkTypeface> orig(set->createTypeface(j));
95            if (normal) {
96                paint.setTypeface(orig);
97            } else {
98                paint.setTypeface(sk_make_sp<SkRandomTypeface>(orig, paint, true));
99            }
100
101            SkTextBlobBuilder builder;
102            for (int aa = 0; aa < 2; aa++) {
103                for (int subpixel = 0; subpixel < 2; subpixel++) {
104                    for (int lcd = 0; lcd < 2; lcd++) {
105                        paint.setAntiAlias(SkToBool(aa));
106                        paint.setSubpixelText(SkToBool(subpixel));
107                        paint.setLCDRenderText(SkToBool(lcd));
108                        if (!SkToBool(lcd)) {
109                            paint.setTextSize(160);
110                        }
111                        const SkTextBlobBuilder::RunBuffer& run = builder.allocRun(paint,
112                                                                                   maxTotalText,
113                                                                                   0, 0,
114                                                                                   nullptr);
115                        memcpy(run.glyphs, text.get(), maxTotalText * sizeof(uint16_t));
116                    }
117                }
118            }
119            blobs.emplace_back(builder.make());
120        }
121    }
122
123    // create surface where LCD is impossible
124    info = SkImageInfo::MakeN32Premul(kWidth, kHeight);
125    SkSurfaceProps propsNoLCD(0, kUnknown_SkPixelGeometry);
126    auto surfaceNoLCD(canvas->makeSurface(info, &propsNoLCD));
127    REPORTER_ASSERT(reporter, surface);
128    if (!surface) {
129        return;
130    }
131
132    SkCanvas* canvasNoLCD = surfaceNoLCD->getCanvas();
133
134    // test redraw
135    draw(canvas, 2, blobs);
136    draw(canvasNoLCD, 2, blobs);
137
138    // test draw after free
139    context->freeGpuResources();
140    draw(canvas, 1, blobs);
141
142    context->freeGpuResources();
143    draw(canvasNoLCD, 1, blobs);
144
145    // test draw after abandon
146    context->abandonContext();
147    draw(canvas, 1, blobs);
148}
149
150DEF_GPUTEST_FOR_NULLGL_CONTEXT(TextBlobCache, reporter, ctxInfo) {
151    text_blob_cache_inner(reporter, ctxInfo.grContext(), 1024, 256, 30, true, false);
152}
153
154DEF_GPUTEST_FOR_NULLGL_CONTEXT(TextBlobStressCache, reporter, ctxInfo) {
155    text_blob_cache_inner(reporter, ctxInfo.grContext(), 256, 256, 10, true, true);
156}
157
158DEF_GPUTEST_FOR_NULLGL_CONTEXT(TextBlobAbnormal, reporter, ctxInfo) {
159    text_blob_cache_inner(reporter, ctxInfo.grContext(), 256, 256, 10, false, false);
160}
161
162DEF_GPUTEST_FOR_NULLGL_CONTEXT(TextBlobStressAbnormal, reporter, ctxInfo) {
163    text_blob_cache_inner(reporter, ctxInfo.grContext(), 256, 256, 10, false, true);
164}
165#endif
166