/* * Copyright 2011 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "samplecode/Sample.h" #include "include/core/SkCanvas.h" #include "include/core/SkColorFilter.h" #include "include/core/SkColorPriv.h" #include "include/core/SkGraphics.h" #include "include/core/SkPath.h" #include "include/core/SkRegion.h" #include "include/core/SkShader.h" #include "include/core/SkStream.h" #include "include/core/SkTextBlob.h" #include "include/core/SkTime.h" #include "include/core/SkTypeface.h" #include "include/effects/SkBlurMaskFilter.h" #include "include/effects/SkGradientShader.h" #include "include/utils/SkRandom.h" #include "modules/skshaper/include/SkShaper.h" #include "src/core/SkOSFile.h" #include "src/shaders/SkColorShader.h" #include "src/utils/SkUTF.h" static const char gText[] = "When in the Course of human events it becomes necessary for one people " "to dissolve the political bands which have connected them with another " "and to assume among the powers of the earth, the separate and equal " "station to which the Laws of Nature and of Nature's God entitle them, " "a decent respect to the opinions of mankind requires that they should " "declare the causes which impel them to the separation."; class TextBoxView : public Sample { public: TextBoxView() : fShaper(SkShaper::Make()) {} protected: SkString name() override { return SkString("TextBox"); } void drawTest(SkCanvas* canvas, SkScalar w, SkScalar h, SkColor fg, SkColor bg) { SkAutoCanvasRestore acr(canvas, true); canvas->clipRect(SkRect::MakeWH(w, h)); canvas->drawColor(bg); SkScalar margin = 20; SkPaint paint; paint.setColor(fg); for (int i = 9; i < 24; i += 2) { SkTextBlobBuilderRunHandler builder(gText, { margin, margin }); SkFont font(nullptr, SkIntToScalar(i)); font.setEdging(SkFont::Edging::kSubpixelAntiAlias); fShaper->shape(gText, strlen(gText), font, true, w - margin, &builder); canvas->drawTextBlob(builder.makeBlob(), 0, 0, paint); canvas->translate(0, builder.endPoint().y()); } } void onDrawContent(SkCanvas* canvas) override { SkScalar width = this->width() / 3; drawTest(canvas, width, this->height(), SK_ColorBLACK, SK_ColorWHITE); canvas->translate(width, 0); drawTest(canvas, width, this->height(), SK_ColorWHITE, SK_ColorBLACK); canvas->translate(width, 0); drawTest(canvas, width, this->height()/2, SK_ColorGRAY, SK_ColorWHITE); canvas->translate(0, this->height()/2); drawTest(canvas, width, this->height()/2, SK_ColorGRAY, SK_ColorBLACK); } private: std::unique_ptr fShaper; typedef Sample INHERITED; }; ////////////////////////////////////////////////////////////////////////////// DEF_SAMPLE( return new TextBoxView(); )