| /* |
| * 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<SkShaper> fShaper; |
| typedef Sample INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_SAMPLE( return new TextBoxView(); ) |