2 * Copyright 2014 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
9 #include "include/core/SkCanvas.h"
10 #include "include/core/SkColor.h"
11 #include "include/core/SkFont.h"
12 #include "include/core/SkFontStyle.h"
13 #include "include/core/SkFontTypes.h"
14 #include "include/core/SkPaint.h"
15 #include "include/core/SkPoint.h"
16 #include "include/core/SkRect.h"
17 #include "include/core/SkRefCnt.h"
18 #include "include/core/SkScalar.h"
19 #include "include/core/SkSize.h"
20 #include "include/core/SkString.h"
21 #include "include/core/SkTypeface.h"
22 #include "include/core/SkTypes.h"
23 #include "include/utils/SkRandom.h"
24 #include "tools/ToolUtils.h"
27 * Draws text with random parameters. The text draws each get their own clip rect. It is also
28 * used as a bench to measure how well the GPU backend combines draw ops for text draws.
31 class VariedTextGM : public skiagm::GM {
33 VariedTextGM(bool effectiveClip, bool lcd)
34 : fEffectiveClip(effectiveClip)
39 SkString onShortName() override {
40 SkString name("varied_text");
42 name.append("_clipped");
44 name.append("_ignorable_clip");
49 name.append("_no_lcd");
54 SkISize onISize() override {
55 return SkISize::Make(640, 480);
58 void onOnceBeforeDraw() override {
59 fPaint.setAntiAlias(true);
60 fFont.setEdging(fLCD ? SkFont::Edging::kSubpixelAntiAlias : SkFont::Edging::kAntiAlias);
62 SkISize size = this->getISize();
63 SkScalar w = SkIntToScalar(size.fWidth);
64 SkScalar h = SkIntToScalar(size.fHeight);
66 static_assert(4 == SK_ARRAY_COUNT(fTypefaces), "typeface_cnt");
67 fTypefaces[0] = ToolUtils::create_portable_typeface("sans-serif", SkFontStyle());
68 fTypefaces[1] = ToolUtils::create_portable_typeface("sans-serif", SkFontStyle::Bold());
69 fTypefaces[2] = ToolUtils::create_portable_typeface("serif", SkFontStyle());
70 fTypefaces[3] = ToolUtils::create_portable_typeface("serif", SkFontStyle::Bold());
73 for (int i = 0; i < kCnt; ++i) {
74 int length = random.nextRangeU(kMinLength, kMaxLength);
75 char text[kMaxLength];
76 for (int j = 0; j < length; ++j) {
77 text[j] = (char)random.nextRangeU('!', 'z');
79 fStrings[i].set(text, length);
81 fColors[i] = random.nextU();
82 fColors[i] |= 0xFF000000;
83 fColors[i] = ToolUtils::color_to_565(fColors[i]);
85 constexpr SkScalar kMinPtSize = 8.f;
86 constexpr SkScalar kMaxPtSize = 32.f;
88 fPtSizes[i] = random.nextRangeScalar(kMinPtSize, kMaxPtSize);
90 fTypefaceIndices[i] = random.nextULessThan(SK_ARRAY_COUNT(fTypefaces));
93 fPaint.setColor(fColors[i]);
94 fFont.setTypeface(fTypefaces[fTypefaceIndices[i]]);
95 fFont.setSize(fPtSizes[i]);
97 fFont.measureText(fStrings[i].c_str(), fStrings[i].size(), SkTextEncoding::kUTF8, &r);
98 // The set of x,y offsets which place the bounding box inside the GM's border.
99 SkRect safeRect = SkRect::MakeLTRB(-r.fLeft, -r.fTop, w - r.fRight, h - r.fBottom);
100 if (safeRect.isEmpty()) {
101 // If the bounds don't fit then allow any offset in the GM's border.
102 safeRect = SkRect::MakeWH(w, h);
104 fOffsets[i].fX = random.nextRangeScalar(safeRect.fLeft, safeRect.fRight);
105 fOffsets[i].fY = random.nextRangeScalar(safeRect.fTop, safeRect.fBottom);
108 fClipRects[i].offset(fOffsets[i].fX, fOffsets[i].fY);
109 fClipRects[i].outset(2.f, 2.f);
111 if (fEffectiveClip) {
112 fClipRects[i].fRight -= 0.25f * fClipRects[i].width();
117 void onDraw(SkCanvas* canvas) override {
118 for (int i = 0; i < kCnt; ++i) {
119 fPaint.setColor(fColors[i]);
120 fFont.setSize(fPtSizes[i]);
121 fFont.setTypeface(fTypefaces[fTypefaceIndices[i]]);
124 canvas->clipRect(fClipRects[i]);
125 canvas->translate(fOffsets[i].fX, fOffsets[i].fY);
126 canvas->drawSimpleText(fStrings[i].c_str(), fStrings[i].size(), SkTextEncoding::kUTF8,
127 0, 0, fFont, fPaint);
131 // Visualize the clips, but not in bench mode.
132 if (kBench_Mode != this->getMode()) {
134 wirePaint.setAntiAlias(true);
135 wirePaint.setStrokeWidth(0);
136 wirePaint.setStyle(SkPaint::kStroke_Style);
137 for (int i = 0; i < kCnt; ++i) {
138 canvas->drawRect(fClipRects[i], wirePaint);
143 bool runAsBench() const override { return true; }
146 inline static constexpr int kCnt = 30;
147 inline static constexpr int kMinLength = 15;
148 inline static constexpr int kMaxLength = 40;
152 sk_sp<SkTypeface> fTypefaces[4];
156 // precomputed for each text draw
157 SkString fStrings[kCnt];
158 SkColor fColors[kCnt];
159 SkScalar fPtSizes[kCnt];
160 int fTypefaceIndices[kCnt];
161 SkPoint fOffsets[kCnt];
162 SkRect fClipRects[kCnt];
164 using INHERITED = skiagm::GM;
167 DEF_GM(return new VariedTextGM(false, false);)
168 DEF_GM(return new VariedTextGM(true, false);)
169 DEF_GM(return new VariedTextGM(false, true);)
170 DEF_GM(return new VariedTextGM(true, true);)