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 10 #include "SkCanvas.h" 11 #include "SkSurface.h" 12 #include "SkTextBlob.h" 13 14 // This tests that we don't try to reuse textblobs from the GPU textblob cache across pixel geometry 15 // changes when we have LCD. crbug/486744 16 namespace skiagm { 17 class TextBlobGeometryChange : public GM { 18 public: TextBlobGeometryChange()19 TextBlobGeometryChange() { } 20 21 protected: onShortName()22 SkString onShortName() override { 23 return SkString("textblobgeometrychange"); 24 } 25 onISize()26 SkISize onISize() override { 27 return SkISize::Make(kWidth, kHeight); 28 } 29 onDraw(SkCanvas * canvas)30 void onDraw(SkCanvas* canvas) override { 31 const char text[] = "Hamburgefons"; 32 33 SkPaint paint; 34 sk_tool_utils::set_portable_typeface(&paint); 35 paint.setTextSize(20); 36 paint.setAntiAlias(true); 37 paint.setLCDRenderText(true); 38 39 SkTextBlobBuilder builder; 40 41 sk_tool_utils::add_to_text_blob(&builder, text, paint, 10, 10); 42 43 SkAutoTUnref<const SkTextBlob> blob(builder.build()); 44 45 SkImageInfo info = SkImageInfo::MakeN32Premul(200, 200); 46 SkSurfaceProps props(0, kUnknown_SkPixelGeometry); 47 SkAutoTUnref<SkSurface> surface(canvas->newSurface(info, &props)); 48 if (surface) { 49 SkCanvas* c = surface->getCanvas(); 50 51 // LCD text on white background 52 SkRect rect = SkRect::MakeLTRB(0.f, 0.f, SkIntToScalar(kWidth), kHeight / 2.f); 53 SkPaint rectPaint; 54 rectPaint.setColor(0xffffffff); 55 canvas->drawRect(rect, rectPaint); 56 canvas->drawTextBlob(blob.get(), 10, 50, paint); 57 58 // This should not look garbled since we should disable LCD text in this case 59 // (i.e., unknown pixel geometry) 60 c->clear(0x00ffffff); 61 c->drawTextBlob(blob.get(), 10, 150, paint); 62 surface->draw(canvas, 0, 0, nullptr); 63 } else { 64 const char* text = "This test requires a surface"; 65 size_t len = strlen(text); 66 SkPaint paint; 67 canvas->drawText(text, len, 10, 100, paint); 68 } 69 } 70 71 private: 72 static const int kWidth = 200; 73 static const int kHeight = 200; 74 75 typedef GM INHERITED; 76 }; 77 78 ////////////////////////////////////////////////////////////////////////////// 79 80 DEF_GM(return new TextBlobGeometryChange;) 81 } 82