1 /* 2 * Copyright 2015 Google Inc. 3 * 4 * Use of this source code is governed by a BD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "gm.h" 9 #include "sk_tool_utils.h" 10 11 #include "SkCanvas.h" 12 #include "SkSurface.h" 13 #include "SkTextBlob.h" 14 15 // This tests that we don't try to reuse textblobs from the GPU textblob cache across pixel geometry 16 // changes when we have LCD. crbug/486744 17 namespace skiagm { 18 class TextBlobGeometryChange : public GM { 19 public: 20 TextBlobGeometryChange() { } 21 22 protected: 23 SkString onShortName() override { 24 return SkString("textblobgeometrychange"); 25 } 26 27 SkISize onISize() override { 28 return SkISize::Make(kWidth, kHeight); 29 } 30 31 void onDraw(SkCanvas* canvas) override { 32 const char text[] = "Hamburgefons"; 33 34 SkFont font(sk_tool_utils::create_portable_typeface(), 20); 35 font.setEdging(SkFont::Edging::kSubpixelAntiAlias); 36 37 SkTextBlobBuilder builder; 38 39 sk_tool_utils::add_to_text_blob(&builder, text, font, 10, 10); 40 41 sk_sp<SkTextBlob> blob(builder.make()); 42 43 SkImageInfo info = SkImageInfo::MakeN32Premul(200, 200); 44 SkSurfaceProps props(0, kUnknown_SkPixelGeometry); 45 auto surface = sk_tool_utils::makeSurface(canvas, info, &props); 46 SkCanvas* c = surface->getCanvas(); 47 48 // LCD text on white background 49 SkRect rect = SkRect::MakeLTRB(0.f, 0.f, SkIntToScalar(kWidth), kHeight / 2.f); 50 SkPaint rectPaint; 51 rectPaint.setColor(0xffffffff); 52 canvas->drawRect(rect, rectPaint); 53 canvas->drawTextBlob(blob, 10, 50, SkPaint()); 54 55 // This should not look garbled since we should disable LCD text in this case 56 // (i.e., unknown pixel geometry) 57 c->clear(0x00ffffff); 58 c->drawTextBlob(blob, 10, 150, SkPaint()); 59 surface->draw(canvas, 0, 0, nullptr); 60 } 61 62 private: 63 static constexpr int kWidth = 200; 64 static constexpr int kHeight = 200; 65 66 typedef GM INHERITED; 67 }; 68 69 ////////////////////////////////////////////////////////////////////////////// 70 71 DEF_GM(return new TextBlobGeometryChange;) 72 } 73