HwBitmapInCompositeShader.cpp revision 2bd7d98fe844ebd6632a55eee9abf6d18651caf5 
1/*
2 * Copyright (C) 2016 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#include "TestSceneBase.h"
18#include "utils/Color.h"
19
20#include <ui/PixelFormat.h>
21#include <SkGradientShader.h>
22#include <SkImagePriv.h>
23
24class HwBitmapInCompositeShader;
25
26static TestScene::Registrar _HwBitmapInCompositeShader(TestScene::Info{
27    "hwbitmapcompositeshader",
28    "Draws composite shader with hardware bitmap",
29    TestScene::simpleCreateScene<HwBitmapInCompositeShader>
30});
31
32class HwBitmapInCompositeShader : public TestScene {
33public:
34    sp<RenderNode> card;
35    void createContent(int width, int height, Canvas& canvas) override {
36        canvas.drawColor(Color::Red_500, SkBlendMode::kSrcOver);
37
38        uint32_t usage = GraphicBuffer::USAGE_HW_TEXTURE
39                | GraphicBuffer::USAGE_SW_READ_NEVER
40                | GRALLOC_USAGE_SW_WRITE_RARELY;
41
42        sp<GraphicBuffer> buffer = new GraphicBuffer(400, 200, PIXEL_FORMAT_RGBA_8888, usage);
43
44        unsigned char* pixels = nullptr;
45        buffer->lock(GraphicBuffer::USAGE_SW_WRITE_RARELY, ((void**)&pixels));
46        size_t size = bytesPerPixel(buffer->getPixelFormat()) * buffer->getStride()
47                * buffer->getHeight();
48        memset(pixels, 0, size);
49        for (int i = 0; i < 6000; i++) {
50            pixels[4000 + 4 * i + 0] = 255;
51            pixels[4000 + 4 * i + 1] = 255;
52            pixels[4000 + 4 * i + 2] = 0;
53            pixels[4000 + 4 * i + 3] = 255;
54        }
55        buffer->unlock();
56        sk_sp<Bitmap> hardwareBitmap(Bitmap::createFrom(buffer));
57        sk_sp<SkShader> hardwareShader(createBitmapShader(*hardwareBitmap));
58
59        SkPoint center;
60        center.set(50, 50);
61        SkColor colors[2];
62        colors[0] = Color::Black;
63        colors[1] = Color::White;
64        sk_sp<SkShader> gradientShader = SkGradientShader::MakeRadial(center, 50, colors, nullptr,
65                2, SkShader::TileMode::kRepeat_TileMode);
66
67        sk_sp<SkShader> compositeShader(
68                SkShader::MakeComposeShader(hardwareShader, gradientShader, SkBlendMode::kDstATop));
69
70        SkPaint paint;
71        paint.setShader(std::move(compositeShader));
72        canvas.drawRoundRect(0, 0, 400, 200, 10.0f, 10.0f, paint);
73    }
74
75    void doFrame(int frameNr) override { }
76
77    sk_sp<SkShader> createBitmapShader(Bitmap& bitmap) {
78        SkBitmap skBitmap;
79        bitmap.getSkBitmapForShaders(&skBitmap);
80        sk_sp<SkImage> image = SkMakeImageFromRasterBitmap(skBitmap, kNever_SkCopyPixelsMode);
81        return image->makeShader(SkShader::TileMode::kClamp_TileMode,
82                SkShader::TileMode::kClamp_TileMode);
83    }
84};
85