/* * 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/SkColorPriv.h" #include "include/core/SkShader.h" #include "samplecode/Sample.h" static 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, }; const int gWidth = 64; const int gHeight = 64; const SkScalar W = SkIntToScalar(gWidth); const SkScalar H = SkIntToScalar(gHeight); static SkScalar drawCell(SkCanvas* canvas, SkBlendMode mode, SkAlpha a0, SkAlpha a1) { SkPaint paint; paint.setAntiAlias(true); SkRect r = SkRect::MakeWH(W, H); r.inset(W/10, H/10); paint.setColor(SK_ColorBLUE); paint.setAlpha(a0); canvas->drawOval(r, paint); paint.setColor(SK_ColorRED); paint.setAlpha(a1); paint.setBlendMode(mode); SkScalar offset = SK_Scalar1 / 3; SkRect rect = SkRect::MakeXYWH(W / 4 + offset, H / 4 + offset, W / 2, H / 2); canvas->drawRect(rect, paint); return H; } static sk_sp make_bg_shader() { SkBitmap bm; bm.allocN32Pixels(2, 2); *bm.getAddr32(0, 0) = *bm.getAddr32(1, 1) = 0xFFFFFFFF; *bm.getAddr32(1, 0) = *bm.getAddr32(0, 1) = SkPackARGB32(0xFF, 0xCC, 0xCC, 0xCC); SkMatrix m; m.setScale(SkIntToScalar(6), SkIntToScalar(6)); return bm.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat, &m); } class AARectsModesView : public Sample { SkPaint fBGPaint; void onOnceBeforeDraw() override { fBGPaint.setShader(make_bg_shader()); } SkString name() override { return SkString("AARectsModes"); } void onDrawContent(SkCanvas* canvas) override { const SkRect bounds = SkRect::MakeWH(W, H); static const SkAlpha gAlphaValue[] = { 0xFF, 0x88, 0x88 }; canvas->translate(SkIntToScalar(4), SkIntToScalar(4)); for (int alpha = 0; alpha < 4; ++alpha) { canvas->save(); canvas->save(); for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); ++i) { if (6 == i) { canvas->restore(); canvas->translate(W * 5, 0); canvas->save(); } canvas->drawRect(bounds, fBGPaint); canvas->saveLayer(&bounds, nullptr); SkScalar dy = drawCell(canvas, gModes[i], gAlphaValue[alpha & 1], gAlphaValue[alpha & 2]); canvas->restore(); canvas->translate(0, dy * 5 / 4); } canvas->restore(); canvas->restore(); canvas->translate(W * 5 / 4, 0); } } }; DEF_SAMPLE( return new AARectsModesView(); )