| /* |
| * 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 "SkXfermode.h" |
| |
| #include "SkStream.h" |
| #include "SkColorPriv.h" |
| #include "SkBlurMaskFilter.h" |
| |
| static void setNamedTypeface(SkPaint* paint, const char name[]) { |
| paint->setTypeface(SkTypeface::MakeFromName(name, SkTypeface::kNormal)); |
| } |
| |
| static uint16_t gBG[] = { 0xFFFF, 0xCCCF, 0xCCCF, 0xFFFF }; |
| |
| class XfermodesBlurView : public SampleView { |
| SkBitmap fBG; |
| SkBitmap fSrcB, fDstB; |
| |
| void draw_mode(SkCanvas* canvas, sk_sp<SkXfermode> 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.setXfermode(std::move(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", SkTypeface::kNormal)); |
| 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)); |
| 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, SkXfermode::Make(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); |