152 lines
4.3 KiB
C++
152 lines
4.3 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 "gm.h"
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#include "SkCanvas.h"
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#include "SkColorPriv.h"
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#include "SkPath.h"
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#include "SkShader.h"
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static void test4(SkCanvas* canvas) {
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SkPaint paint;
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paint.setAntiAlias(true);
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SkPoint pts[] = {
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{10, 160}, {610, 160},
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{610, 160}, {10, 160},
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{610, 160}, {610, 160},
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{610, 199}, {610, 199},
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{10, 198}, {610, 198},
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{610, 199}, {10, 199},
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{10, 160}, {10, 160},
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{10, 199}, {10, 199}
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};
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char verbs[] = {
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0, 1, 1, 1, 4,
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0, 1, 1, 1, 4,
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0, 1, 1, 1, 4,
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0, 1, 1, 1, 4
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};
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SkPath path;
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SkPoint* ptPtr = pts;
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for (size_t i = 0; i < sizeof(verbs); ++i) {
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switch ((SkPath::Verb) verbs[i]) {
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case SkPath::kMove_Verb:
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path.moveTo(ptPtr->fX, ptPtr->fY);
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++ptPtr;
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break;
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case SkPath::kLine_Verb:
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path.lineTo(ptPtr->fX, ptPtr->fY);
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++ptPtr;
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break;
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case SkPath::kClose_Verb:
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path.close();
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break;
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default:
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SkASSERT(false);
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break;
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}
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}
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SkRect clip = {0, 130, 772, 531};
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canvas->clipRect(clip);
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canvas->drawPath(path, paint);
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}
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constexpr 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, 0xCE,
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0xCF, 0xCE);
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const SkMatrix m = SkMatrix::MakeScale(SkIntToScalar(6), SkIntToScalar(6));
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return SkShader::MakeBitmapShader(bm, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode,
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&m);
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}
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DEF_SIMPLE_GM(aarectmodes, canvas, 640, 480) {
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SkPaint bgPaint;
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bgPaint.setShader(make_bg_shader());
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if (false) { // avoid bit rot, suppress warning
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test4(canvas);
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}
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const SkRect bounds = SkRect::MakeWH(W, H);
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constexpr 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, bgPaint);
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canvas->saveLayer(&bounds, nullptr);
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SkScalar dy = drawCell(canvas, gModes[i],
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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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