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Side by Side Diff: gm/textblobmixedsizes.cpp

Issue 1316443006: Write a gm to verify append large glyph as path works (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Created 5 years, 3 months ago
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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 "gm.h"
9
10 #include "Resources.h"
11 #include "SkBlurMask.h"
12 #include "SkBlurMaskFilter.h"
13 #include "SkCanvas.h"
14 #include "SkGradientShader.h"
15 #include "SkImage.h"
16 #include "SkRandom.h"
17 #include "SkStream.h"
18 #include "SkSurface.h"
19 #include "SkTextBlob.h"
20 #include "SkTypeface.h"
21
22 namespace skiagm {
23 class TextBlobMixedSizes : public GM {
24 public:
25 // This gm tests that textblobs of mixed sizes with a large glyph will rende r properly
26 TextBlobMixedSizes(bool useDFT) : fUseDFT(useDFT) {}
27
28 protected:
29 void onOnceBeforeDraw() override {
30 SkAutoTUnref<SkTypeface> typeface(GetResourceAsTypeface("/fonts/HangingS .ttf"));
31 SkTextBlobBuilder builder;
32
33 // make textblob. To stress distance fields, we choose sizes appropriat ely
34 SkPaint paint;
35 paint.setAntiAlias(true);
36 paint.setSubpixelText(true);
37 paint.setLCDRenderText(true);
38 paint.setTypeface(typeface);
39
40 const char* text = "Sk";
41
42 // extra large
43 paint.setTextSize(262);
44 sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, 0);
45
46 // large
47 SkRect bounds;
48 paint.measureText(text, strlen(text), &bounds);
49 SkScalar yOffset = bounds.height();
50 paint.setTextSize(162);
51
52 sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset);
53
54 // Medium
55 paint.measureText(text, strlen(text), &bounds);
56 yOffset += bounds.height();
57 paint.setTextSize(72);
robertphillips 2015/08/26 17:33:58 add line ?
58 sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset);
59
60 // Small
61 paint.measureText(text, strlen(text), &bounds);
62 yOffset += bounds.height();
63
robertphillips 2015/08/26 17:33:58 rm line ?
64 paint.setTextSize(32);
robertphillips 2015/08/26 17:33:58 add line ?
65 sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset);
66
67 // micro (will fall out of distance field text even if distance field te xt is enabled)
68 paint.measureText(text, strlen(text), &bounds);
69 yOffset += bounds.height();
70
71 paint.setTextSize(14);
72 sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset);
73
74 // build
75 fBlob.reset(builder.build());
76 }
77
78 SkString onShortName() override {
79 SkString name("textblobmixedsizes");
80 if (fUseDFT) {
81 name.appendf("_df");
82 }
83 return name;
84 }
85
86 SkISize onISize() override {
87 return SkISize::Make(kWidth, kHeight);
88 }
89
90 void onDraw(SkCanvas* inputCanvas) override {
91 SkCanvas* canvas = inputCanvas;
92 SkAutoTUnref<SkSurface> surface;
93 if (fUseDFT) {
94 #if SK_SUPPORT_GPU
robertphillips 2015/08/26 17:33:58 // Create a new Canvas to enable DFT ?
95 GrContext* ctx = inputCanvas->getGrContext();
96 SkImageInfo info = SkImageInfo::MakeN32Premul(onISize());
97 SkSurfaceProps props(SkSurfaceProps::kUseDistanceFieldFonts_Flag,
98 SkSurfaceProps::kLegacyFontHost_InitType);
99 surface.reset(SkSurface::NewRenderTarget(ctx, SkSurface::kNo_Budgete d, info, 0,
100 &props));
101 canvas = surface.get() ? surface->getCanvas() : inputCanvas;
102 // init our new canvas with the old canvas's matrix
103 canvas->setMatrix(inputCanvas->getTotalMatrix());
104 canvas->drawColor(sk_tool_utils::color_to_565(SK_ColorWHITE));
105 #endif
106 } else {
107 canvas->drawColor(sk_tool_utils::color_to_565(SK_ColorBLACK));
108 }
109
110 SkRect bounds = fBlob->bounds();
111
112 static const int kPadX = bounds.width() / 3;
113 static const int kPadY = bounds.height() / 3;
114
115 int rowCount = 0;
116 canvas->translate(SkIntToScalar(kPadX), SkIntToScalar(kPadY));
117 canvas->save();
118 SkRandom random;
119
120 SkPaint paint;
121 paint.setAntiAlias(true);
122
123 static const SkScalar kSigma = SkBlurMask::ConvertRadiusToSigma(SkIntToS calar(8));
124
125 // setup blur paint
126 SkPaint blurPaint(paint);
127 blurPaint.setColor(sk_tool_utils::color_to_565(SK_ColorWHITE));
128 SkAutoTUnref<SkMaskFilter> mf(SkBlurMaskFilter::Create(kNormal_SkBlurSty le, kSigma));
129 blurPaint.setMaskFilter(mf);
130
131 for (int i = 0; i < 4; i++) {
132 canvas->save();
robertphillips 2015/08/26 17:33:58 Can this just be "i % 2" ?
133 switch (random.nextU() % 2) {
134 case 0:
135 canvas->rotate(random.nextF() * 45.f);
136 break;
137 case 1:
138 canvas->rotate(-random.nextF() * 45.f);
139 break;
140 }
141 if (!fUseDFT) {
142 canvas->drawTextBlob(fBlob, 0, 0, blurPaint);
143 }
144 canvas->drawTextBlob(fBlob, 0, 0, paint);
145 canvas->restore();
146 canvas->translate(bounds.width() + SK_Scalar1 * kPadX, 0);
147 ++rowCount;
148 if ((bounds.width() + 2 * kPadX) * rowCount > kWidth) {
149 canvas->restore();
150 canvas->translate(0, bounds.height() + SK_Scalar1 * kPadY);
151 canvas->save();
152 rowCount = 0;
153 }
154 }
155 canvas->restore();
156
157 #if SK_SUPPORT_GPU
158 // render offscreen buffer
159 if (surface) {
160 SkAutoCanvasRestore acr(inputCanvas, true);
161 // since we prepended this matrix already, we blit using identity
162 inputCanvas->resetMatrix();
163 SkImage* image = surface->newImageSnapshot();
164 inputCanvas->drawImage(image, 0, 0, NULL);
165 image->unref();
166 }
167 #endif
168 }
169
170 private:
171 SkAutoTUnref<const SkTextBlob> fBlob;
172
173 static const int kWidth = 2000;
174 static const int kHeight = 2000;
175
176 bool fUseDFT;
177
178 typedef GM INHERITED;
179 };
180
181 //////////////////////////////////////////////////////////////////////////////
182
183 DEF_GM( return SkNEW_ARGS(TextBlobMixedSizes, (false)); )
184 #if SK_SUPPORT_GPU
185 DEF_GM( return SkNEW_ARGS(TextBlobMixedSizes, (true)); )
186 #endif
187 }
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