blob: 1d31524e66db9f1fda2483b46e894f196599aff9 [file] [log] [blame]
/*
* 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 "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkColorPriv.h"
#include "include/core/SkFont.h"
#include "include/core/SkGraphics.h"
#include "include/core/SkPath.h"
#include "include/core/SkRegion.h"
#include "include/core/SkShader.h"
#include "include/core/SkTime.h"
#include "include/core/SkTypeface.h"
#include "include/effects/SkCornerPathEffect.h"
#include "include/effects/SkGradientShader.h"
#include "include/utils/SkRandom.h"
#include "include/utils/SkTextUtils.h"
#include "samplecode/Sample.h"
#include "src/core/SkBlurMask.h"
#include "src/utils/SkUTF.h"
#include "include/core/SkColorPriv.h"
#include "include/core/SkStream.h"
#include "include/effects/SkBlurMaskFilter.h"
static void setNamedTypeface(SkFont* font, const char name[]) {
font->setTypeface(SkTypeface::MakeFromName(name, SkFontStyle()));
}
static uint16_t gBG[] = { 0xFFFF, 0xCCCF, 0xCCCF, 0xFFFF };
class XfermodesBlurView : public Sample {
SkBitmap fBG;
SkBitmap fSrcB, fDstB;
void draw_mode(SkCanvas* canvas, SkBlendMode mode, int alpha, SkScalar x, SkScalar y) {
SkPaint p;
p.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle,
SkBlurMask::ConvertRadiusToSigma(5)));
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:
virtual SkString name() { return SkString("XfermodesBlur"); }
virtual void onDrawContent(SkCanvas* canvas) {
canvas->translate(SkIntToScalar(10), SkIntToScalar(20));
const SkBlendMode gModes[] = {
SkBlendMode::kClear,
SkBlendMode::kSrc,
SkBlendMode::kDst,
SkBlendMode::kSrcOver,
SkBlendMode::kDstOver,
SkBlendMode::kSrcIn,
SkBlendMode::kDstIn,
SkBlendMode::kSrcOut,
SkBlendMode::kDstOut,
SkBlendMode::kSrcATop,
SkBlendMode::kDstATop,
SkBlendMode::kXor,
SkBlendMode::kPlus,
};
const SkScalar w = SkIntToScalar(W);
const SkScalar h = SkIntToScalar(H);
SkMatrix m;
m.setScale(SkIntToScalar(6), SkIntToScalar(6));
auto s = fBG.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat, &m);
SkFont font;
font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
setNamedTypeface(&font, "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], 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);
const char* label = SkBlendMode_Name(gModes[i]);
SkTextUtils::DrawString(canvas, label, x + w/2, y - font.getSize()/2, font, SkPaint(),
SkTextUtils::kCenter_Align);
x += w + SkIntToScalar(10);
if ((i % W) == W - 1) {
x = x0;
y += h + SkIntToScalar(30);
}
}
x0 += SkIntToScalar(400);
}
}
private:
typedef Sample INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_SAMPLE( return new XfermodesBlurView(); )