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/*
* Copyright 2017 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 "tools/Resources.h"
#include "tools/ToolUtils.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkFontMetrics.h"
#include "include/core/SkFontMgr.h"
#include "include/core/SkTextBlob.h"
#include "include/core/SkTypeface.h"
#include "include/utils/SkRandom.h"
#if SK_SUPPORT_GPU
#include "include/gpu/GrContext.h"
#include "src/gpu/GrContextPriv.h"
#endif
static sk_sp<SkTypeface> chinese_typeface() {
#ifdef SK_BUILD_FOR_ANDROID
return MakeResourceAsTypeface("fonts/NotoSansCJK-Regular.ttc");
#elif defined(SK_BUILD_FOR_WIN)
return SkTypeface::MakeFromName("SimSun", SkFontStyle());
#elif defined(SK_BUILD_FOR_MAC)
return SkTypeface::MakeFromName("Hiragino Sans GB W3", SkFontStyle());
#elif defined(SK_BUILD_FOR_IOS)
return SkTypeface::MakeFromName("Hiragino Sans GB W3", SkFontStyle());
#elif defined(SK_BUILD_FOR_UNIX)
return SkTypeface::MakeFromName("Noto Sans CJK SC", SkFontStyle());
#else
return nullptr;
#endif
}
class ChineseFlingView : public Sample {
static constexpr int kNumBlobs = 200;
static constexpr int kWordLength = 16;
sk_sp<SkTypeface> fTypeface;
SkFontMetrics fMetrics;
sk_sp<SkTextBlob> fBlobs[kNumBlobs];
SkRandom fRand;
int fIndex = 0;
SkString name() override { return SkString("chinese-fling"); }
void onDrawContent(SkCanvas* canvas) override {
canvas->clear(0xFFDDDDDD);
SkPaint paint;
paint.setColor(0xDE000000);
// draw a consistent run of the 'words' - one word per line
int index = fIndex;
for (SkScalar y = 0.0f; y < 1024.0f; ) {
y += -fMetrics.fAscent;
canvas->drawTextBlob(fBlobs[index], 0, y, paint);
y += fMetrics.fDescent + fMetrics.fLeading;
++index;
index %= kNumBlobs;
}
// now "fling" a random amount
fIndex += fRand.nextRangeU(5, 20);
fIndex %= kNumBlobs;
}
void onOnceBeforeDraw() override {
fTypeface = chinese_typeface();
SkFont font(fTypeface, 56);
font.getMetrics(&fMetrics);
SkUnichar glyphs[kWordLength];
for (int32_t i = 0; i < kNumBlobs; ++i) {
this->createRandomWord(glyphs);
SkTextBlobBuilder builder;
ToolUtils::add_to_text_blob_w_len(&builder,
(const char*)glyphs,
kWordLength * 4,
SkTextEncoding::kUTF32,
font,
0,
0);
fBlobs[i] = builder.make();
}
}
// Construct a random kWordLength character 'word' drawing from the full Chinese set
void createRandomWord(SkUnichar glyphs[kWordLength]) {
for (int i = 0; i < kWordLength; ++i) {
glyphs[i] = fRand.nextRangeU(0x4F00, 0x9FA0);
}
}
};
class ChineseZoomView : public Sample {
static constexpr int kNumBlobs = 8;
static constexpr int kParagraphLength = 175;
bool fAfterFirstFrame = false;
sk_sp<SkTypeface> fTypeface;
SkFontMetrics fMetrics;
sk_sp<SkTextBlob> fBlobs[kNumBlobs];
SkRandom fRand;
SkScalar fScale = 15;
SkScalar fTranslate = 0;
SkString name() override { return SkString("chinese-zoom"); }
bool onChar(SkUnichar uni) override {
if ('>' == uni) {
fScale += 0.125f;
return true;
}
if ('<' == uni) {
fScale -= 0.125f;
return true;
}
return false;
}
void onDrawContent(SkCanvas* canvas) override {
canvas->clear(0xFFDDDDDD);
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(0xDE000000);
if (fAfterFirstFrame) {
#if SK_SUPPORT_GPU
GrContext* grContext = canvas->getGrContext();
if (grContext) {
sk_sp<SkImage> image = grContext->priv().testingOnly_getFontAtlasImage(
GrMaskFormat::kA8_GrMaskFormat, 0);
canvas->drawImageRect(image,
SkRect::MakeXYWH(10.0f, 10.0f, 512.0f, 512.0), &paint);
image = grContext->priv().testingOnly_getFontAtlasImage(
GrMaskFormat::kA8_GrMaskFormat, 1);
canvas->drawImageRect(image,
SkRect::MakeXYWH(522.0f, 10.0f, 512.f, 512.0f), &paint);
image = grContext->priv().testingOnly_getFontAtlasImage(
GrMaskFormat::kA8_GrMaskFormat, 2);
canvas->drawImageRect(image,
SkRect::MakeXYWH(10.0f, 522.0f, 512.0f, 512.0f), &paint);
image = grContext->priv().testingOnly_getFontAtlasImage(
GrMaskFormat::kA8_GrMaskFormat, 3);
canvas->drawImageRect(image,
SkRect::MakeXYWH(522.0f, 522.0f, 512.0f, 512.0f), &paint);
}
#endif
}
canvas->scale(fScale, fScale);
canvas->translate(0, fTranslate);
fTranslate -= 0.5f;
// draw a consistent run of the 'words' - one word per line
SkScalar y = 0;
for (int index = 0; index < kNumBlobs; ++index) {
y += -fMetrics.fAscent;
canvas->drawTextBlob(fBlobs[index], 0, y, paint);
y += 3*(fMetrics.fDescent - fMetrics.fAscent + fMetrics.fLeading);
}
if (!fAfterFirstFrame) {
fAfterFirstFrame = true;
}
}
void onOnceBeforeDraw() override {
fTypeface = chinese_typeface();
SkFont font(fTypeface, 11);
font.getMetrics(&fMetrics);
SkPaint paint;
paint.setColor(0xDE000000);
SkUnichar glyphs[45];
for (int32_t i = 0; i < kNumBlobs; ++i) {
SkTextBlobBuilder builder;
auto paragraphLength = kParagraphLength;
SkScalar y = 0;
while (paragraphLength - 45 > 0) {
auto currentLineLength = std::min(45, paragraphLength - 45);
this->createRandomLine(glyphs, currentLineLength);
ToolUtils::add_to_text_blob_w_len(&builder,
(const char*)glyphs,
currentLineLength * 4,
SkTextEncoding::kUTF32,
font,
0,
y);
y += fMetrics.fDescent - fMetrics.fAscent + fMetrics.fLeading;
paragraphLength -= 45;
}
fBlobs[i] = builder.make();
}
}
// Construct a random kWordLength character 'word' drawing from the full Chinese set
void createRandomLine(SkUnichar glyphs[45], int lineLength) {
for (auto i = 0; i < lineLength; ++i) {
glyphs[i] = fRand.nextRangeU(0x4F00, 0x9FA0);
}
}
};
//////////////////////////////////////////////////////////////////////////////
DEF_SAMPLE( return new ChineseFlingView(); )
DEF_SAMPLE( return new ChineseZoomView(); )
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