зеркало из https://github.com/mozilla/moz-skia.git
122 строки
3.1 KiB
C++
122 строки
3.1 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 "SkBlurMaskFilter.h"
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#include "SkCanvas.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 "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 "SkXfermode.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 "SkOSFile.h"
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#include "SkStream.h"
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static void check_for_nonwhite(const SkBitmap& bm, int alpha) {
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if (bm.config() != SkBitmap::kRGB_565_Config) {
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return;
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}
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for (int y = 0; y < bm.height(); y++) {
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for (int x = 0; x < bm.width(); x++) {
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uint16_t c = *bm.getAddr16(x, y);
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if (c != 0xFFFF) {
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SkDebugf("------ nonwhite alpha=%x [%d %d] %x\n", alpha, x, y, c);
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return;
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}
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}
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}
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}
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class TextAlphaView : public SampleView {
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public:
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TextAlphaView() {
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fByte = 0xFF;
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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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SkString str("TextAlpha");
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SampleCode::TitleR(evt, str.c_str());
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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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const char* str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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SkPaint paint;
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SkScalar x = SkIntToScalar(10);
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SkScalar y = SkIntToScalar(20);
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paint.setFlags(0x105);
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paint.setARGB(fByte, 0xFF, 0xFF, 0xFF);
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paint.setMaskFilter(SkBlurMaskFilter::Create(SkIntToScalar(3),
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SkBlurMaskFilter::kNormal_BlurStyle));
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paint.getMaskFilter()->unref();
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SkRandom rand;
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for (int ps = 6; ps <= 35; ps++) {
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paint.setColor(rand.nextU() | (0xFF << 24));
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paint.setTextSize(SkIntToScalar(ps));
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paint.setTextSize(SkIntToScalar(24));
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canvas->drawText(str, strlen(str), x, y, paint);
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y += paint.getFontMetrics(NULL);
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}
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//check_for_nonwhite(canvas->getDevice()->accessBitmap(), fByte);
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//SkDebugf("------ byte %x\n", fByte);
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if (false) {
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fByte += 1;
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fByte &= 0xFF;
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this->inval(NULL);
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}
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}
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virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) {
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return new Click(this);
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}
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virtual bool onClick(Click* click) {
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int y = click->fICurr.fY;
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if (y < 0) {
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y = 0;
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} else if (y > 255) {
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y = 255;
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}
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fByte = y;
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this->inval(NULL);
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return true;
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}
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private:
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int fByte;
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typedef SampleView INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new TextAlphaView; }
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static SkViewRegister reg(MyFactory);
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