/* * 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 "SkCanvas.h" #include "Sk64.h" #include "SkCornerPathEffect.h" #include "SkGradientShader.h" #include "SkGraphics.h" #include "SkImageDecoder.h" #include "SkKernel33MaskFilter.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(5, SkBlurMaskFilter::kNormal_BlurStyle, 0); 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() { const int W = 64; const int H = 64; fBG.setConfig(SkBitmap::kARGB_4444_Config, 2, 2, 4); fBG.setPixels(gBG); fBG.setIsOpaque(true); } 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)); 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::kMultiply_Mode, "Multiply" }, { 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); SkShader* s = SkShader::CreateBitmapShader(fBG, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode); SkMatrix m; m.setScale(SkIntToScalar(6), SkIntToScalar(6)); s->setLocalMatrix(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, SkCanvas::kARGB_ClipLayer_SaveFlag); 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);