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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 void test4(SkCanvas* canvas) {
SkPaint paint;
paint.setAntiAlias(true);
SkPoint pts[] = {
{10, 160}, {610, 160},
{610, 160}, {10, 160},
{610, 160}, {610, 160},
{610, 199}, {610, 199},
{10, 198}, {610, 198},
{610, 199}, {10, 199},
{10, 160}, {10, 160},
{10, 199}, {10, 199}
};
char verbs[] = {
0, 1, 1, 1, 4,
0, 1, 1, 1, 4,
0, 1, 1, 1, 4,
0, 1, 1, 1, 4
};
SkPath path;
SkPoint* ptPtr = pts;
for (size_t i = 0; i < sizeof(verbs); ++i) {
switch ((SkPath::Verb) verbs[i]) {
case SkPath::kMove_Verb:
path.moveTo(ptPtr->fX, ptPtr->fY);
++ptPtr;
break;
case SkPath::kLine_Verb:
path.lineTo(ptPtr->fX, ptPtr->fY);
++ptPtr;
break;
case SkPath::kClose_Verb:
path.close();
break;
default:
SkASSERT(false);
break;
}
}
SkRect clip = {0, 130, 772, 531};
canvas->clipRect(clip);
canvas->drawPath(path, paint);
}
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, 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(mode);
SkScalar offset = SK_Scalar1 / 3;
SkRect rect = SkRect::MakeXYWH(W / 4 + offset,
H / 4 + offset,
W / 2, H / 2);
canvas->drawRect(rect, paint);
return H;
}
static 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, 0xCC,
0xCC, 0xCC);
SkShader* s = SkShader::CreateBitmapShader(bm,
SkShader::kRepeat_TileMode,
SkShader::kRepeat_TileMode);
SkMatrix m;
m.setScale(SkIntToScalar(6), SkIntToScalar(6));
s->setLocalMatrix(m);
return s;
}
namespace skiagm {
class AARectModesGM : public GM {
SkPaint fBGPaint;
public:
AARectModesGM () {
fBGPaint.setShader(make_bg_shader())->unref();
}
protected:
virtual SkString onShortName() {
return SkString("aarectmodes");
}
virtual SkISize onISize() { return make_isize(640, 480); }
virtual void onDraw(SkCanvas* canvas) {
if (false) { // avoid bit rot, suppress warning
test4(canvas);
}
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();
}
SkXfermode* mode = SkXfermode::Create(gModes[i].fMode);
canvas->drawRect(bounds, fBGPaint);
canvas->saveLayer(&bounds, NULL);
SkScalar dy = drawCell(canvas, mode,
gAlphaValue[alpha & 1],
gAlphaValue[alpha & 2]);
canvas->restore();
canvas->translate(0, dy * 5 / 4);
SkSafeUnref(mode);
}
canvas->restore();
canvas->restore();
canvas->translate(W * 5 / 4, 0);
}
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new AARectModesGM; }
static GMRegistry reg(MyFactory);
}
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