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#include "SampleCode.h"
#include "SkColorPriv.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkUtils.h"
static SkBitmap make_bitmap() {
SkBitmap bm;
SkColorTable* ctable = new SkColorTable(256);
SkPMColor* c = ctable->lockColors();
for (int i = 0; i < 256; i++) {
c[i] = SkPackARGB32(0xFF, 0, 0, i);
}
ctable->unlockColors(true);
bm.setConfig(SkBitmap::kIndex8_Config, 256, 32);
bm.allocPixels(ctable);
ctable->unref();
bm.lockPixels();
for (int y = 0; y < bm.height(); y++) {
uint8_t* p = bm.getAddr8(0, y);
for (int x = 0; x < 256; x++) {
p[x] = x;
}
}
bm.unlockPixels();
return bm;
}
class DitherBitmapView : public SkView {
SkBitmap fBM8;
SkBitmap fBM32;
public:
DitherBitmapView() {
fBM8 = make_bitmap();
fBM8.copyTo(&fBM32, SkBitmap::kARGB_8888_Config);
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "DitherBitmap");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawBG(SkCanvas* canvas) {
canvas->drawColor(0xFFDDDDDD);
}
static void draw2(SkCanvas* canvas, const SkBitmap& bm) {
SkPaint paint;
canvas->drawBitmap(bm, 0, 0, &paint);
paint.setDither(true);
canvas->drawBitmap(bm, 0, SkIntToScalar(bm.height() + 10), &paint);
}
virtual void onDraw(SkCanvas* canvas) {
drawBG(canvas);
canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
draw2(canvas, fBM8);
canvas->translate(0, SkIntToScalar(fBM8.height() *3));
draw2(canvas, fBM32);
}
private:
typedef SkView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new DitherBitmapView; }
static SkViewRegister reg(MyFactory);
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