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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SampleCode.h"
#include "SkView.h"
#include "SkBlurMaskFilter.h"
#include "SkCanvas.h"
#include "SkDevice.h"
#include "SkGradientShader.h"
#include "SkGraphics.h"
#include "SkImageDecoder.h"
#include "SkPath.h"
#include "SkRandom.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include "SkXfermode.h"
#include "SkColorPriv.h"
#include "SkColorFilter.h"
#include "SkTime.h"
#include "SkTypeface.h"
#include "SkOSFile.h"
#include "SkStream.h"
static void check_for_nonwhite(const SkBitmap& bm, int alpha) {
if (bm.config() != SkBitmap::kRGB_565_Config) {
return;
}
for (int y = 0; y < bm.height(); y++) {
for (int x = 0; x < bm.width(); x++) {
uint16_t c = *bm.getAddr16(x, y);
if (c != 0xFFFF) {
SkDebugf("------ nonwhite alpha=%x [%d %d] %x\n", alpha, x, y, c);
return;
}
}
}
}
class TextAlphaView : public SampleView {
public:
TextAlphaView() {
fByte = 0xFF;
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "TextAlpha");
return true;
}
return this->INHERITED::onQuery(evt);
}
virtual void onDrawContent(SkCanvas* canvas) {
const char* str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
SkPaint paint;
SkScalar x = SkIntToScalar(10);
SkScalar y = SkIntToScalar(20);
paint.setFlags(0x105);
paint.setARGB(fByte, 0xFF, 0xFF, 0xFF);
paint.setMaskFilter(SkBlurMaskFilter::Create(SkIntToScalar(3),
SkBlurMaskFilter::kNormal_BlurStyle));
paint.getMaskFilter()->unref();
SkRandom rand;
for (int ps = 6; ps <= 35; ps++) {
paint.setColor(rand.nextU() | (0xFF << 24));
paint.setTextSize(SkIntToScalar(ps));
paint.setTextSize(SkIntToScalar(24));
canvas->drawText(str, strlen(str), x, y, paint);
y += paint.getFontMetrics(NULL);
}
if (false) { // avoid bit rot, suppress warning
check_for_nonwhite(canvas->getDevice()->accessBitmap(false), fByte);
SkDebugf("------ byte %x\n", fByte);
}
if (false) {
fByte += 1;
fByte &= 0xFF;
this->inval(NULL);
}
}
virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) SK_OVERRIDE {
return new Click(this);
}
virtual bool onClick(Click* click) {
int y = click->fICurr.fY;
if (y < 0) {
y = 0;
} else if (y > 255) {
y = 255;
}
fByte = y;
this->inval(NULL);
return true;
}
private:
int fByte;
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new TextAlphaView; }
static SkViewRegister reg(MyFactory);
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