d7639aff10
- replace virtual with override.
- remove default constructor.
- use default field initializers
- move work from constructor into onOnceBeforeDraw
- mark everything private
- enum { N = 100 }; constants to constexpr
- remove unused variables
Change-Id: I8c7a19bc24fec416a6b88d634ee948d3e842b986
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/228056
Commit-Queue: Ben Wagner <bungeman@google.com>
Auto-Submit: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
111 lines
3.1 KiB
C++
111 lines
3.1 KiB
C++
/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "include/core/SkBitmap.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColorPriv.h"
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#include "include/core/SkShader.h"
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#include "samplecode/Sample.h"
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static const SkBlendMode gModes[] = {
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SkBlendMode::kClear,
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SkBlendMode::kSrc,
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SkBlendMode::kDst,
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SkBlendMode::kSrcOver,
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SkBlendMode::kDstOver,
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SkBlendMode::kSrcIn,
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SkBlendMode::kDstIn,
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SkBlendMode::kSrcOut,
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SkBlendMode::kDstOut,
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SkBlendMode::kSrcATop,
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SkBlendMode::kDstATop,
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SkBlendMode::kXor,
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};
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const int gWidth = 64;
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const int gHeight = 64;
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const SkScalar W = SkIntToScalar(gWidth);
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const SkScalar H = SkIntToScalar(gHeight);
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static SkScalar drawCell(SkCanvas* canvas, SkBlendMode mode, SkAlpha a0, SkAlpha a1) {
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SkPaint paint;
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paint.setAntiAlias(true);
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SkRect r = SkRect::MakeWH(W, H);
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r.inset(W/10, H/10);
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paint.setColor(SK_ColorBLUE);
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paint.setAlpha(a0);
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canvas->drawOval(r, paint);
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paint.setColor(SK_ColorRED);
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paint.setAlpha(a1);
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paint.setBlendMode(mode);
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SkScalar offset = SK_Scalar1 / 3;
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SkRect rect = SkRect::MakeXYWH(W / 4 + offset,
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H / 4 + offset,
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W / 2, H / 2);
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canvas->drawRect(rect, paint);
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return H;
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}
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static sk_sp<SkShader> make_bg_shader() {
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SkBitmap bm;
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bm.allocN32Pixels(2, 2);
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*bm.getAddr32(0, 0) = *bm.getAddr32(1, 1) = 0xFFFFFFFF;
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*bm.getAddr32(1, 0) = *bm.getAddr32(0, 1) = SkPackARGB32(0xFF, 0xCC,
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0xCC, 0xCC);
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SkMatrix m;
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m.setScale(SkIntToScalar(6), SkIntToScalar(6));
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return bm.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat, &m);
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}
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class AARectsModesView : public Sample {
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SkPaint fBGPaint;
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void onOnceBeforeDraw() override {
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fBGPaint.setShader(make_bg_shader());
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}
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SkString name() override { return SkString("AARectsModes"); }
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void onDrawContent(SkCanvas* canvas) override {
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const SkRect bounds = SkRect::MakeWH(W, H);
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static const SkAlpha gAlphaValue[] = { 0xFF, 0x88, 0x88 };
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canvas->translate(SkIntToScalar(4), SkIntToScalar(4));
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for (int alpha = 0; alpha < 4; ++alpha) {
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canvas->save();
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canvas->save();
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for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); ++i) {
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if (6 == i) {
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canvas->restore();
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canvas->translate(W * 5, 0);
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canvas->save();
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}
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canvas->drawRect(bounds, fBGPaint);
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canvas->saveLayer(&bounds, nullptr);
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SkScalar dy = drawCell(canvas, gModes[i], gAlphaValue[alpha & 1],
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gAlphaValue[alpha & 2]);
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canvas->restore();
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canvas->translate(0, dy * 5 / 4);
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}
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canvas->restore();
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canvas->restore();
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canvas->translate(W * 5 / 4, 0);
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}
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}
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};
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DEF_SAMPLE( return new AARectsModesView(); )
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