| /* |
| * 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/gm.h" |
| #include "include/core/SkBitmap.h" |
| #include "include/core/SkBlendMode.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkColorPriv.h" |
| #include "include/core/SkMatrix.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPath.h" |
| #include "include/core/SkPathBuilder.h" |
| #include "include/core/SkPoint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkTileMode.h" |
| #include "include/core/SkTypes.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 |
| }; |
| SkPathBuilder 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.detach(), 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); |
| |
| return bm.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat, SkSamplingOptions(), |
| SkMatrix::Scale(6, 6)); |
| } |
| |
| 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 < std::size(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); |
| } |
| } |