ede860e91c
Bug: skia: Change-Id: I41480aa89dfcd8cb7e016e477cbabe354f35ce8a Reviewed-on: https://skia-review.googlesource.com/75480 Reviewed-by: Mike Reed <reed@google.com> Commit-Queue: Brian Osman <brianosman@google.com>
131 lines
3.6 KiB
C++
131 lines
3.6 KiB
C++
/*
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* Copyright 2017 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 "Resources.h"
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#include "SampleCode.h"
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#include "sk_tool_utils.h"
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#include "SkCanvas.h"
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#include "SkFontMgr.h"
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#include "SkRandom.h"
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#include "SkTypeface.h"
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#include "SkTextBlob.h"
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static void make_paint(SkPaint* paint, sk_sp<SkTypeface> typeface) {
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static const int kTextSize = 56;
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paint->setAntiAlias(true);
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paint->setColor(0xDE000000);
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paint->setTypeface(typeface);
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paint->setTextSize(kTextSize);
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paint->setTextEncoding(SkPaint::kUTF32_TextEncoding);
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}
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static sk_sp<SkTypeface> chinese_typeface() {
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#ifdef SK_BUILD_FOR_ANDROID
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return MakeResourceAsTypeface("/fonts/NotoSansCJK-Regular.ttc");
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#elif defined(SK_BUILD_FOR_WIN32)
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return SkTypeface::MakeFromName("SimSun", SkFontStyle());
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#elif defined(SK_BUILD_FOR_MAC)
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return SkTypeface::MakeFromName("Hiragino Sans GB W3", SkFontStyle());
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#elif defined(SK_BUILD_FOR_IOS)
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return SkTypeface::MakeFromName("Hiragino Sans GB W3", SkFontStyle());
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#elif defined(SK_BUILD_FOR_UNIX)
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return SkTypeface::MakeFromName("Noto Sans CJK SC", SkFontStyle());
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#else
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return nullptr;
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#endif
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}
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class ChineseFlingView : public SampleView {
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public:
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ChineseFlingView() : fBlobs(kNumBlobs) {}
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protected:
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bool onQuery(SkEvent* evt) override {
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if (SampleCode::TitleQ(*evt)) {
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SampleCode::TitleR(evt, "chinese-fling");
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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 onDrawContent(SkCanvas* canvas) override {
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if (!fInitialized) {
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this->init();
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fInitialized = true;
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}
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canvas->clear(0xFFDDDDDD);
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SkPaint paint;
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make_paint(&paint, fTypeface);
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// draw a consistent run of the 'words' - one word per line
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int index = fIndex;
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for (SkScalar y = 0.0f; y < 1024.0f; ) {
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y += -fMetrics.fAscent;
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canvas->drawTextBlob(fBlobs[index], 0, y, paint);
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y += fMetrics.fDescent + fMetrics.fLeading;
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++index;
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index %= fBlobs.count();
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}
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// now "fling" a random amount
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fIndex += fRand.nextRangeU(5, 20);
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fIndex %= fBlobs.count();
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}
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private:
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static constexpr auto kNumBlobs = 200;
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static constexpr auto kWordLength = 16;
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void init() {
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fTypeface = chinese_typeface();
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SkPaint paint;
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make_paint(&paint, fTypeface);
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paint.getFontMetrics(&fMetrics);
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SkUnichar glyphs[kWordLength];
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for (int32_t i = 0; i < kNumBlobs; ++i) {
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this->createRandomWord(glyphs);
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SkTextBlobBuilder builder;
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sk_tool_utils::add_to_text_blob_w_len(&builder, (const char*) glyphs, kWordLength*4,
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paint, 0, 0);
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fBlobs.emplace_back(builder.make());
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}
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fIndex = 0;
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}
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// Construct a random kWordLength character 'word' drawing from the full Chinese set
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void createRandomWord(SkUnichar glyphs[kWordLength]) {
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for (int i = 0; i < kWordLength; ++i) {
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glyphs[i] = fRand.nextRangeU(0x4F00, 0x9FA0);
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}
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}
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bool fInitialized = false;
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sk_sp<SkTypeface> fTypeface;
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SkPaint::FontMetrics fMetrics;
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SkTArray<sk_sp<SkTextBlob>> fBlobs;
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SkRandom fRand;
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int fIndex;
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typedef SkView INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new ChineseFlingView; }
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static SkViewRegister reg(MyFactory);
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