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