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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 "gm.h"
#include "SkCanvas.h"
#include "SkColorPriv.h"
#include "SkShader.h"
static const struct {
SkXfermode::Mode fMode;
const char* fLabel;
} gModes[] = {
{ SkXfermode::kClear_Mode, "Clear" },
{ SkXfermode::kSrc_Mode, "Src" },
{ SkXfermode::kDst_Mode, "Dst" },
{ SkXfermode::kSrcOver_Mode, "SrcOver" },
{ SkXfermode::kDstOver_Mode, "DstOver" },
{ SkXfermode::kSrcIn_Mode, "SrcIn" },
{ SkXfermode::kDstIn_Mode, "DstIn" },
{ SkXfermode::kSrcOut_Mode, "SrcOut" },
{ SkXfermode::kDstOut_Mode, "DstOut" },
{ SkXfermode::kSrcATop_Mode, "SrcATop" },
{ SkXfermode::kDstATop_Mode, "DstATop" },
{ SkXfermode::kXor_Mode, "Xor" },
};
const int gWidth = 64;
const int gHeight = 64;
const SkScalar W = SkIntToScalar(gWidth);
const SkScalar H = SkIntToScalar(gHeight);
static SkScalar drawCell(SkCanvas* canvas, sk_sp<SkXfermode> mode, SkAlpha a0, SkAlpha a1) {
SkPaint paint;
paint.setAntiAlias(true);
SkRect r = SkRect::MakeWH(W, H);
r.inset(W/10, H/10);
paint.setColor(SK_ColorBLUE);
paint.setAlpha(a0);
canvas->drawOval(r, paint);
paint.setColor(SK_ColorRED);
paint.setAlpha(a1);
paint.setXfermode(std::move(mode));
for (int angle = 0; angle < 24; ++angle) {
SkScalar x = SkScalarCos(SkIntToScalar(angle) * (SK_ScalarPI * 2) / 24) * gWidth;
SkScalar y = SkScalarSin(SkIntToScalar(angle) * (SK_ScalarPI * 2) / 24) * gHeight;
paint.setStrokeWidth(SK_Scalar1 * angle * 2 / 24);
canvas->drawLine(W/2, H/2, W/2 + x, H/2 + y, paint);
}
return H;
}
static sk_sp<SkShader> make_bg_shader() {
SkBitmap bm;
bm.allocN32Pixels(2, 2);
*bm.getAddr32(0, 0) = *bm.getAddr32(1, 1) = 0xFFFFFFFF;
*bm.getAddr32(1, 0) = *bm.getAddr32(0, 1) = SkPackARGB32(0xFF, 0xCE, 0xCF, 0xCE);
SkMatrix m;
m.setScale(SkIntToScalar(6), SkIntToScalar(6));
return SkShader::MakeBitmapShader(bm,
SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode, &m);
}
namespace skiagm {
class HairModesGM : public GM {
SkPaint fBGPaint;
protected:
SkString onShortName() override {
return SkString("hairmodes");
}
virtual SkISize onISize() override { return SkISize::Make(640, 480); }
void onOnceBeforeDraw() override {
fBGPaint.setShader(make_bg_shader());
}
void onDraw(SkCanvas* canvas) override {
const SkRect bounds = SkRect::MakeWH(W, H);
static const SkAlpha gAlphaValue[] = { 0xFF, 0x88, 0x88 };
canvas->translate(SkIntToScalar(4), SkIntToScalar(4));
for (int alpha = 0; alpha < 4; ++alpha) {
canvas->save();
canvas->save();
for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); ++i) {
if (6 == i) {
canvas->restore();
canvas->translate(W * 5, 0);
canvas->save();
}
canvas->drawRect(bounds, fBGPaint);
canvas->saveLayer(&bounds, nullptr);
SkScalar dy = drawCell(canvas, SkXfermode::Make(gModes[i].fMode),
gAlphaValue[alpha & 1],
gAlphaValue[alpha & 2]);
canvas->restore();
canvas->translate(0, dy * 5 / 4);
}
canvas->restore();
canvas->restore();
canvas->translate(W * 5 / 4, 0);
}
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new HairModesGM; }
static GMRegistry reg(MyFactory);
}
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