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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 "SkBlurMask.h"
#include "SkCanvas.h"
#include "SkCornerPathEffect.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 "SkColorPriv.h"
#include "SkColorFilter.h"
#include "SkTime.h"
#include "SkTypeface.h"
#include "SkXfermode.h"
#include "SkStream.h"
#include "SkXMLParser.h"
#include "SkColorPriv.h"
#include "SkImageDecoder.h"
#include "SkBlurMaskFilter.h"
static void setNamedTypeface(SkPaint* paint, const char name[]) {
SkTypeface* face = SkTypeface::CreateFromName(name, SkTypeface::kNormal);
paint->setTypeface(face);
SkSafeUnref(face);
}
static uint16_t gBG[] = { 0xFFFF, 0xCCCF, 0xCCCF, 0xFFFF };
class XfermodesBlurView : public SampleView {
SkBitmap fBG;
SkBitmap fSrcB, fDstB;
void draw_mode(SkCanvas* canvas, SkXfermode* mode, int alpha,
SkScalar x, SkScalar y) {
SkPaint p;
SkMaskFilter* mf = SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5)),
SkBlurMaskFilter::kNone_BlurFlag);
p.setMaskFilter(mf)->unref();
SkScalar ww = SkIntToScalar(W);
SkScalar hh = SkIntToScalar(H);
// draw a circle covering the upper
// left three quarters of the canvas
p.setColor(0xFFCC44FF);
SkRect r;
r.set(0, 0, ww*3/4, hh*3/4);
r.offset(x, y);
canvas->drawOval(r, p);
p.setXfermode(mode);
// draw a square overlapping the circle
// in the lower right of the canvas
p.setColor(0x00AA6633 | alpha << 24);
r.set(ww/3, hh/3, ww*19/20, hh*19/20);
r.offset(x, y);
canvas->drawRect(r, p);
}
public:
const static int W = 64;
const static int H = 64;
XfermodesBlurView() {
fBG.installPixels(SkImageInfo::Make(2, 2, kARGB_4444_SkColorType, kPremul_SkAlphaType),
gBG, 4);
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "XfermodesBlur");
return true;
}
return this->INHERITED::onQuery(evt);
}
virtual void onDrawContent(SkCanvas* canvas) {
canvas->translate(SkIntToScalar(10), SkIntToScalar(20));
if (false) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setTextSize(50);
paint.setTypeface(SkTypeface::CreateFromName("Arial Unicode MS", SkTypeface::kNormal));
SkSafeUnref(paint.getTypeface());
char buffer[10];
size_t len = SkUTF8_FromUnichar(0x8500, buffer);
canvas->drawText(buffer, len, 40, 40, paint);
return;
}
if (false) {
SkPaint paint;
paint.setAntiAlias(true);
SkRect r0 = { 0, 0, 10.5f, 20 };
SkRect r1 = { 10.5f, 10, 20, 30 };
paint.setColor(SK_ColorRED);
canvas->drawRect(r0, paint);
paint.setColor(SK_ColorBLUE);
canvas->drawRect(r1, paint);
return;
}
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" },
{ SkXfermode::kPlus_Mode, "Plus" },
/*{ SkXfermode::kModulate_Mode, "Modulate" },
{ SkXfermode::kScreen_Mode, "Screen" },
{ SkXfermode::kOverlay_Mode, "Overlay" },
{ SkXfermode::kDarken_Mode, "Darken" },
{ SkXfermode::kLighten_Mode, "Lighten" },
{ SkXfermode::kColorDodge_Mode, "ColorDodge" },
{ SkXfermode::kColorBurn_Mode, "ColorBurn" },
{ SkXfermode::kHardLight_Mode, "HardLight" },
{ SkXfermode::kSoftLight_Mode, "SoftLight" },
{ SkXfermode::kDifference_Mode, "Difference" },
{ SkXfermode::kExclusion_Mode, "Exclusion" },*/
};
const SkScalar w = SkIntToScalar(W);
const SkScalar h = SkIntToScalar(H);
SkMatrix m;
m.setScale(SkIntToScalar(6), SkIntToScalar(6));
SkShader* s = SkShader::CreateBitmapShader(fBG,
SkShader::kRepeat_TileMode,
SkShader::kRepeat_TileMode,
&m);
SkPaint labelP;
labelP.setAntiAlias(true);
labelP.setLCDRenderText(true);
labelP.setTextAlign(SkPaint::kCenter_Align);
setNamedTypeface(&labelP, "Menlo Regular");
const int W = 5;
SkScalar x0 = 0;
for (int twice = 0; twice < 2; twice++) {
SkScalar x = x0, y = 0;
for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++) {
SkXfermode* mode = SkXfermode::Create(gModes[i].fMode);
SkAutoUnref aur(mode);
SkRect r;
r.set(x, y, x+w, y+h);
SkPaint p;
p.setStyle(SkPaint::kFill_Style);
p.setShader(s);
canvas->drawRect(r, p);
canvas->saveLayer(&r, NULL);
draw_mode(canvas, mode, twice ? 0x88 : 0xFF, r.fLeft, r.fTop);
canvas->restore();
r.inset(-SK_ScalarHalf, -SK_ScalarHalf);
p.setStyle(SkPaint::kStroke_Style);
p.setShader(NULL);
canvas->drawRect(r, p);
canvas->drawText(gModes[i].fLabel, strlen(gModes[i].fLabel),
x + w/2, y - labelP.getTextSize()/2, labelP);
x += w + SkIntToScalar(10);
if ((i % W) == W - 1) {
x = x0;
y += h + SkIntToScalar(30);
}
}
x0 += SkIntToScalar(400);
}
s->unref();
}
private:
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new XfermodesBlurView; }
static SkViewRegister reg(MyFactory);
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