/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "Sample.h"
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#include "SkBlurMaskFilter.h"
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#include "SkCanvas.h"
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#include "SkColorFilter.h"
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#include "SkColorPriv.h"
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#include "SkColorShader.h"
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#include "SkGradientShader.h"
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#include "SkGraphics.h"
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#include "SkOSFile.h"
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#include "SkPath.h"
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#include "SkRandom.h"
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#include "SkRegion.h"
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#include "SkShader.h"
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#include "SkShaper.h"
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#include "SkStream.h"
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#include "SkTextBlob.h"
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#include "SkTime.h"
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#include "SkTypeface.h"
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#include "SkUTF.h"
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extern void skia_set_text_gamma(float blackGamma, float whiteGamma);
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#if defined(SK_BUILD_FOR_WIN) && defined(SK_FONTHOST_WIN_GDI)
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extern SkTypeface* SkCreateTypefaceFromLOGFONT(const LOGFONT&);
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#endif
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static const char gText[] =
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"When in the Course of human events it becomes necessary for one people "
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"to dissolve the political bands which have connected them with another "
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"and to assume among the powers of the earth, the separate and equal "
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"station to which the Laws of Nature and of Nature's God entitle them, "
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"a decent respect to the opinions of mankind requires that they should "
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"declare the causes which impel them to the separation.";
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class TextBoxView : public Sample {
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public:
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TextBoxView() {
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#if defined(SK_BUILD_FOR_WIN) && defined(SK_FONTHOST_WIN_GDI)
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LOGFONT lf;
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sk_bzero(&lf, sizeof(lf));
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lf.lfHeight = 9;
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SkTypeface* tf0 = SkCreateTypefaceFromLOGFONT(lf);
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lf.lfHeight = 12;
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SkTypeface* tf1 = SkCreateTypefaceFromLOGFONT(lf);
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// we assert that different sizes should not affect which face we get
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SkASSERT(tf0 == tf1);
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tf0->unref();
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tf1->unref();
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#endif
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}
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protected:
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bool onQuery(Sample::Event* evt) override {
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if (Sample::TitleQ(*evt)) {
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Sample::TitleR(evt, "TextBox");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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void drawTest(SkCanvas* canvas, SkScalar w, SkScalar h, SkColor fg, SkColor bg) {
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SkAutoCanvasRestore acr(canvas, true);
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canvas->clipRect(SkRect::MakeWH(w, h));
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canvas->drawColor(bg);
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SkShaper shaper(nullptr);
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SkScalar margin = 20;
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SkPaint paint;
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paint.setColor(fg);
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for (int i = 9; i < 24; i += 2) {
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SkTextBlobBuilderRunHandler builder;
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SkFont font(nullptr, SkIntToScalar(i));
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font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
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SkPoint end = shaper.shape(&builder, font, gText, strlen(gText), true,
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{ margin, margin }, w - margin);
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canvas->drawTextBlob(builder.makeBlob(), 0, 0, paint);
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canvas->translate(0, end.y());
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}
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}
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void onDrawContent(SkCanvas* canvas) override {
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SkScalar width = this->width() / 3;
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drawTest(canvas, width, this->height(), SK_ColorBLACK, SK_ColorWHITE);
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canvas->translate(width, 0);
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drawTest(canvas, width, this->height(), SK_ColorWHITE, SK_ColorBLACK);
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canvas->translate(width, 0);
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drawTest(canvas, width, this->height()/2, SK_ColorGRAY, SK_ColorWHITE);
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canvas->translate(0, this->height()/2);
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drawTest(canvas, width, this->height()/2, SK_ColorGRAY, SK_ColorBLACK);
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}
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private:
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typedef Sample INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_SAMPLE( return new TextBoxView(); )
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