зеркало из https://github.com/mozilla/moz-skia.git
150 строки
4.2 KiB
C++
150 строки
4.2 KiB
C++
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/*
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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 "SampleCode.h"
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#include "SkView.h"
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#include "SkCanvas.h"
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#include "Sk64.h"
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#include "SkGradientShader.h"
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#include "SkGraphics.h"
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#include "SkImageDecoder.h"
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#include "SkKernel33MaskFilter.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 "SkUtils.h"
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#include "SkColorPriv.h"
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#include "SkColorFilter.h"
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#include "SkTime.h"
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#include "SkTypeface.h"
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#include "SkXfermode.h"
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static void lettersToBitmap(SkBitmap* dst, const char chars[],
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const SkPaint& original, SkBitmap::Config config) {
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SkPath path;
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SkScalar x = 0;
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SkScalar width;
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SkPath p;
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for (size_t i = 0; i < strlen(chars); i++) {
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original.getTextPath(&chars[i], 1, x, 0, &p);
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path.addPath(p);
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original.getTextWidths(&chars[i], 1, &width);
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x += width;
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}
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SkRect bounds = path.getBounds();
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SkScalar sw = -original.getStrokeWidth();
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bounds.inset(sw, sw);
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path.offset(-bounds.fLeft, -bounds.fTop);
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bounds.offset(-bounds.fLeft, -bounds.fTop);
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int w = SkScalarRound(bounds.width());
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int h = SkScalarRound(bounds.height());
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SkPaint paint(original);
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SkBitmap src;
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src.setConfig(config, w, h);
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src.allocPixels();
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src.eraseColor(0);
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{
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SkCanvas canvas(src);
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paint.setAntiAlias(true);
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paint.setColor(SK_ColorBLACK);
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paint.setStyle(SkPaint::kFill_Style);
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canvas.drawPath(path, paint);
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}
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dst->setConfig(config, w, h);
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dst->allocPixels();
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dst->eraseColor(SK_ColorWHITE);
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{
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SkCanvas canvas(*dst);
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paint.setXfermodeMode(SkXfermode::kDstATop_Mode);
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canvas.drawBitmap(src, 0, 0, &paint);
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paint.setColor(original.getColor());
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paint.setStyle(SkPaint::kStroke_Style);
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canvas.drawPath(path, paint);
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}
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}
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static void lettersToBitmap2(SkBitmap* dst, const char chars[],
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const SkPaint& original, SkBitmap::Config config) {
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SkPath path;
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SkScalar x = 0;
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SkScalar width;
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SkPath p;
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for (size_t i = 0; i < strlen(chars); i++) {
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original.getTextPath(&chars[i], 1, x, 0, &p);
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path.addPath(p);
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original.getTextWidths(&chars[i], 1, &width);
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x += width;
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}
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SkRect bounds = path.getBounds();
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SkScalar sw = -original.getStrokeWidth();
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bounds.inset(sw, sw);
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path.offset(-bounds.fLeft, -bounds.fTop);
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bounds.offset(-bounds.fLeft, -bounds.fTop);
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int w = SkScalarRound(bounds.width());
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int h = SkScalarRound(bounds.height());
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SkPaint paint(original);
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paint.setAntiAlias(true);
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paint.setXfermodeMode(SkXfermode::kDstATop_Mode);
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paint.setColor(original.getColor());
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paint.setStyle(SkPaint::kStroke_Style);
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dst->setConfig(config, w, h);
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dst->allocPixels();
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dst->eraseColor(SK_ColorWHITE);
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SkCanvas canvas(*dst);
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canvas.drawPath(path, paint);
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}
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class StrokeTextView : public SampleView {
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bool fAA;
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public:
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StrokeTextView() : fAA(false) {
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this->setBGColor(0xFFCC8844);
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}
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protected:
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// overrides from SkEventSink
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virtual bool onQuery(SkEvent* evt) {
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if (SampleCode::TitleQ(*evt)) {
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SampleCode::TitleR(evt, "StrokeText");
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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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virtual void onDrawContent(SkCanvas* canvas) {
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SkBitmap bm;
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SkPaint paint;
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paint.setStrokeWidth(SkIntToScalar(6));
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paint.setTextSize(SkIntToScalar(80));
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// paint.setTypeface(Typeface.DEFAULT_BOLD);
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lettersToBitmap(&bm, "Test Case", paint, SkBitmap::kARGB_4444_Config);
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if (false) { // avoid bit rot, suppress warning
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lettersToBitmap2(&bm, "Test Case", paint, SkBitmap::kARGB_4444_Config);
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}
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canvas->drawBitmap(bm, 0, 0);
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}
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private:
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typedef SampleView INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new StrokeTextView; }
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static SkViewRegister reg(MyFactory);
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