1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17
18#include "TestSceneBase.h"
19
20#include <SkGradientShader.h>
21
22class SimpleGradientAnimation;
23
24static TestScene::Registrar _SimpleGradient(TestScene::Info{
25    "simpleGradient",
26    "A benchmark of shader performance of linear, 2 color gradients with black in them.",
27    TestScene::simpleCreateScene<SimpleGradientAnimation>
28});
29
30class SimpleGradientAnimation : public TestScene {
31public:
32    std::vector< sp<RenderNode> > cards;
33    void createContent(int width, int height, Canvas& canvas) override {
34        canvas.drawColor(Color::White, SkBlendMode::kSrcOver);
35
36        sp<RenderNode> card = createCard(0, 0, width, height);
37        canvas.drawRenderNode(card.get());
38        cards.push_back(card);
39    }
40    void doFrame(int frameNr) override {
41        int curFrame = frameNr % 20;
42        for (size_t ci = 0; ci < cards.size(); ci++) {
43            cards[ci]->mutateStagingProperties().setTranslationX(curFrame);
44            cards[ci]->mutateStagingProperties().setTranslationY(curFrame);
45            cards[ci]->setPropertyFieldsDirty(RenderNode::X | RenderNode::Y);
46        }
47    }
48private:
49    sp<RenderNode> createCard(int x, int y, int width, int height) {
50        return TestUtils::createNode(x, y, x + width, y + height,
51                [width, height](RenderProperties& props, Canvas& canvas) {
52            float pos[] = { 0, 1 };
53            SkPoint pts[] = { SkPoint::Make(0, 0), SkPoint::Make(width, height) };
54            SkPaint paint;
55            // overdraw several times to emphasize shader cost
56            for (int i = 0; i < 10; i++) {
57                // use i%2 start position to pick 2 color combo with black in it
58                SkColor colors[3] = { Color::Transparent, Color::Black, Color::Cyan_500 };
59                paint.setShader(SkGradientShader::MakeLinear(pts, colors + (i % 2), pos, 2,
60                    SkShader::kClamp_TileMode));
61                canvas.drawRect(i, i, width, height, paint);
62            }
63        });
64    }
65};
66