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#include "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkColorFilter.h"
#include "SkDevice.h"
#include "SkPaint.h"
#include "SkShader.h"
static SkShader* createChecker() {
SkBitmap bm;
bm.setConfig(SkBitmap::kARGB_8888_Config, 2, 2);
bm.allocPixels();
bm.lockPixels();
*bm.getAddr32(0, 0) = *bm.getAddr32(1, 1) = SkPreMultiplyColor(0xFFFFFFFF);
*bm.getAddr32(0, 1) = *bm.getAddr32(1, 0) = SkPreMultiplyColor(0xFFCCCCCC);
SkShader* s = SkShader::CreateBitmapShader(bm, SkShader::kRepeat_TileMode,
SkShader::kRepeat_TileMode);
SkMatrix m;
m.setScale(12, 12);
s->setLocalMatrix(m);
return s;
}
static SkBitmap createBitmap(int n) {
SkBitmap bitmap;
bitmap.setConfig(SkBitmap::kARGB_8888_Config, n, n);
bitmap.allocPixels();
bitmap.eraseColor(0);
SkCanvas canvas(bitmap);
SkRect r;
r.set(0, 0, SkIntToScalar(n), SkIntToScalar(n));
r.inset(SK_Scalar1, SK_Scalar1);
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(SK_ColorRED);
canvas.drawOval(r, paint);
r.inset(SK_Scalar1*n/4, SK_Scalar1*n/4);
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
paint.setColor(0x800000FF);
canvas.drawOval(r, paint);
return bitmap;
}
class ColorFilterView : public SampleView {
SkBitmap fBitmap;
SkShader* fShader;
enum {
N = 64
};
public:
ColorFilterView() {
fBitmap = createBitmap(N);
fShader = createChecker();
}
virtual ~ColorFilterView() {
fShader->unref();
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "ColorFilter");
return true;
}
return this->INHERITED::onQuery(evt);
}
virtual void onDrawBackground(SkCanvas* canvas) {
SkPaint paint;
paint.setShader(fShader);
canvas->drawPaint(paint);
}
virtual void onDrawContent(SkCanvas* canvas) {
if (false) {
SkPaint p;
p.setAntiAlias(true);
SkRect r = { 20.4f, 10, 20.6f, 20 };
canvas->drawRect(r, p);
r.set(30.9f, 10, 31.1f, 20);
canvas->drawRect(r, p);
return;
}
static const SkXfermode::Mode gModes[] = {
SkXfermode::kSrc_Mode,
SkXfermode::kDst_Mode,
SkXfermode::kSrcIn_Mode,
SkXfermode::kDstIn_Mode,
SkXfermode::kSrcOut_Mode,
SkXfermode::kDstOut_Mode,
SkXfermode::kSrcATop_Mode,
SkXfermode::kDstATop_Mode,
};
static const SkColor gColors[] = {
0xFF000000,
0x80000000,
0xFF00FF00,
0x8000FF00,
0x00000000,
};
float scale = 1.5f;
SkPaint paint;
canvas->translate(N / 8, N / 8);
for (size_t y = 0; y < SK_ARRAY_COUNT(gColors); y++) {
for (size_t x = 0; x < SK_ARRAY_COUNT(gModes); x++) {
SkColorFilter* cf = SkColorFilter::CreateModeFilter(gColors[y], gModes[x]);
SkSafeUnref(paint.setColorFilter(cf));
canvas->drawBitmap(fBitmap, x * N * 1.25f, y * N * scale, &paint);
}
}
}
private:
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new ColorFilterView; }
static SkViewRegister reg(MyFactory);
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