skia2/samplecode/SampleXfermodesBlur.cpp
Mike Reed 0e39f97cd7 Revert "Revert "make it illegal to include SkXfermode.h""
This reverts commit e9d1b299cc.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> Revert "make it illegal to include SkXfermode.h"
> 
> This reverts commit 07764cefbb.
> 
> Reason for revert: breaking google3
> 
> Original change's description:
> > make it illegal to include SkXfermode.h
> > 
> > BUG=skia:
> > 
> > GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=5133
> > 
> > Change-Id: I6e8596dcb17cd7e8efa67859bb682bf9bfcac4db
> > Reviewed-on: https://skia-review.googlesource.com/5133
> > Reviewed-by: Mike Reed <reed@google.com>
> > Commit-Queue: Mike Reed <reed@google.com>
> > 
> 
> TBR=reed@google.com,reviews@skia.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> 
> Change-Id: I136f9e533eb60633c49dffa19b5747d50b6d98a8
> Reviewed-on: https://skia-review.googlesource.com/5196
> Commit-Queue: Greg Daniel <egdaniel@google.com>
> Reviewed-by: Greg Daniel <egdaniel@google.com>
> 

TBR=egdaniel@google.com,reviews@skia.org,reed@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: I0b767ce778a4ade83c2f07d5ece486bb46d7712c
Reviewed-on: https://skia-review.googlesource.com/5223
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Reed <reed@google.com>
2016-11-23 22:17:17 +00:00

186 lines
5.8 KiB
C++

/*
* 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 "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 "SkStream.h"
#include "SkColorPriv.h"
#include "SkBlurMaskFilter.h"
static void setNamedTypeface(SkPaint* paint, const char name[]) {
paint->setTypeface(SkTypeface::MakeFromName(name, SkFontStyle()));
}
static uint16_t gBG[] = { 0xFFFF, 0xCCCF, 0xCCCF, 0xFFFF };
class XfermodesBlurView : public SampleView {
SkBitmap fBG;
SkBitmap fSrcB, fDstB;
void draw_mode(SkCanvas* canvas, SkBlendMode mode, int alpha, SkScalar x, SkScalar y) {
SkPaint p;
p.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
SkBlurMask::ConvertRadiusToSigma(5),
SkBlurMaskFilter::kNone_BlurFlag));
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.setBlendMode(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::MakeFromName("Arial Unicode MS", SkFontStyle()));
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 {
SkBlendMode fMode;
const char* fLabel;
} gModes[] = {
{ SkBlendMode::kClear, "Clear" },
{ SkBlendMode::kSrc, "Src" },
{ SkBlendMode::kDst, "Dst" },
{ SkBlendMode::kSrcOver, "SrcOver" },
{ SkBlendMode::kDstOver, "DstOver" },
{ SkBlendMode::kSrcIn, "SrcIn" },
{ SkBlendMode::kDstIn, "DstIn" },
{ SkBlendMode::kSrcOut, "SrcOut" },
{ SkBlendMode::kDstOut, "DstOut" },
{ SkBlendMode::kSrcATop, "SrcATop" },
{ SkBlendMode::kDstATop, "DstATop" },
{ SkBlendMode::kXor, "Xor" },
{ SkBlendMode::kPlus, "Plus" },
};
const SkScalar w = SkIntToScalar(W);
const SkScalar h = SkIntToScalar(H);
SkMatrix m;
m.setScale(SkIntToScalar(6), SkIntToScalar(6));
auto s = SkShader::MakeBitmapShader(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++) {
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, nullptr);
draw_mode(canvas, gModes[i].fMode, twice ? 0x88 : 0xFF, r.fLeft, r.fTop);
canvas->restore();
r.inset(-SK_ScalarHalf, -SK_ScalarHalf);
p.setStyle(SkPaint::kStroke_Style);
p.setShader(nullptr);
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);
}
}
private:
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new XfermodesBlurView; }
static SkViewRegister reg(MyFactory);