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: TextBlobGeometryChange()20 TextBlobGeometryChange() { } 21 22 protected: onShortName()23 SkString onShortName() override { 24 return SkString("textblobgeometrychange"); 25 } 26 onISize()27 SkISize onISize() override { 28 return SkISize::Make(kWidth, kHeight); 29 } 30 onDraw(SkCanvas * canvas)31 void onDraw(SkCanvas* canvas) override { 32 const char text[] = "Hamburgefons"; 33 34 SkPaint paint; 35 sk_tool_utils::set_portable_typeface(&paint); 36 paint.setTextSize(20); 37 paint.setAntiAlias(true); 38 paint.setLCDRenderText(true); 39 40 SkTextBlobBuilder builder; 41 42 sk_tool_utils::add_to_text_blob(&builder, text, paint, 10, 10); 43 44 sk_sp<SkTextBlob> blob(builder.make()); 45 46 SkImageInfo info = SkImageInfo::MakeN32Premul(200, 200); 47 SkSurfaceProps props(0, kUnknown_SkPixelGeometry); 48 auto surface = canvas->makeSurface(info, &props); 49 if (!surface) { 50 surface = SkSurface::MakeRaster(info, &props); 51 } 52 SkCanvas* c = surface->getCanvas(); 53 54 // LCD text on white background 55 SkRect rect = SkRect::MakeLTRB(0.f, 0.f, SkIntToScalar(kWidth), kHeight / 2.f); 56 SkPaint rectPaint; 57 rectPaint.setColor(0xffffffff); 58 canvas->drawRect(rect, rectPaint); 59 canvas->drawTextBlob(blob, 10, 50, paint); 60 61 // This should not look garbled since we should disable LCD text in this case 62 // (i.e., unknown pixel geometry) 63 c->clear(0x00ffffff); 64 c->drawTextBlob(blob, 10, 150, paint); 65 surface->draw(canvas, 0, 0, nullptr); 66 } 67 68 private: 69 static constexpr int kWidth = 200; 70 static constexpr int kHeight = 200; 71 72 typedef GM INHERITED; 73 }; 74 75 ////////////////////////////////////////////////////////////////////////////// 76 77 DEF_GM(return new TextBlobGeometryChange;) 78 } 79