/* * 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(); )