1/*
2 * Copyright (C) 2015 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
17package android.uirendering.cts.testclasses;
18
19import android.graphics.Bitmap;
20import android.graphics.BitmapShader;
21import android.graphics.Canvas;
22import android.graphics.Color;
23import android.graphics.ComposeShader;
24import android.graphics.LinearGradient;
25import android.graphics.Paint;
26import android.graphics.PorterDuff;
27import android.graphics.RadialGradient;
28import android.graphics.Shader;
29import android.support.test.filters.MediumTest;
30import android.support.test.runner.AndroidJUnit4;
31import android.uirendering.cts.bitmapcomparers.MSSIMComparer;
32import android.uirendering.cts.bitmapverifiers.ColorVerifier;
33import android.uirendering.cts.testinfrastructure.ActivityTestBase;
34import android.uirendering.cts.testinfrastructure.CanvasClient;
35
36import org.junit.Test;
37import org.junit.runner.RunWith;
38
39@MediumTest
40@RunWith(AndroidJUnit4.class)
41public class ShaderTests extends ActivityTestBase {
42    @Test
43    public void testSinglePixelBitmapShader() {
44        createTest()
45                .addCanvasClient(new CanvasClient() {
46                    Paint mPaint = new Paint();
47                    @Override
48                    public void draw(Canvas canvas, int width, int height) {
49                        if (mPaint.getShader() == null) {
50                            Bitmap shaderBitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888);
51                            shaderBitmap.eraseColor(Color.BLUE);
52                            mPaint.setShader(new BitmapShader(shaderBitmap,
53                                    Shader.TileMode.REPEAT, Shader.TileMode.REPEAT));
54                        }
55                        canvas.drawRect(0, 0, width, height, mPaint);
56                    }
57                })
58                .runWithVerifier(new ColorVerifier(Color.BLUE));
59    }
60
61    @Test
62    public void testSinglePixelComposeShader() {
63        createTest()
64                .addCanvasClient(new CanvasClient() {
65                    Paint mPaint = new Paint();
66
67                    @Override
68                    public void draw(Canvas canvas, int width, int height) {
69                        if (mPaint.getShader() == null) {
70                            // BLUE as SRC for Compose
71                            Bitmap shaderBitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888);
72                            shaderBitmap.eraseColor(Color.BLUE);
73                            BitmapShader bitmapShader = new BitmapShader(shaderBitmap,
74                                    Shader.TileMode.REPEAT, Shader.TileMode.REPEAT);
75
76                            // Fully opaque gradient mask (via DST_IN).
77                            // In color array, only alpha channel will matter.
78                            RadialGradient gradientShader = new RadialGradient(
79                                    10, 10, 10,
80                                    new int[] { Color.RED, Color.GREEN, Color.BLUE }, null,
81                                    Shader.TileMode.CLAMP);
82
83                            mPaint.setShader(new ComposeShader(
84                                    bitmapShader, gradientShader, PorterDuff.Mode.DST_IN));
85                        }
86                        canvas.drawRect(0, 0, width, height, mPaint);
87                    }
88                })
89                .runWithVerifier(new ColorVerifier(Color.BLUE));
90    }
91
92    @Test
93    public void testComplexShaderUsage() {
94        /*
95         * This test not only builds a very complex drawing operation, but also tests an
96         * implementation detail of HWUI, using the largest number of texture sample sources
97         * possible - 4.
98         *
99         * 1) Bitmap passed to canvas.drawBitmap
100         * 2) gradient color lookup
101         * 3) gradient dither lookup
102         * 4) Bitmap in BitmapShader
103          */
104        createTest()
105                .addCanvasClient(new CanvasClient() {
106                    Paint mPaint = new Paint();
107                    Bitmap mBitmap;
108
109                    @Override
110                    public void draw(Canvas canvas, int width, int height) {
111                        if (mBitmap == null) {
112                            mBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ALPHA_8);
113                            // Primary content mask
114                            Canvas bitmapCanvas = new Canvas(mBitmap);
115                            final float radius = width / 2.0f;
116                            bitmapCanvas.drawCircle(width / 2, height / 2, radius, mPaint);
117
118                            // Bitmap shader mask, partially overlapping content
119                            Bitmap shaderBitmap = Bitmap.createBitmap(
120                                    width, height, Bitmap.Config.ALPHA_8);
121                            bitmapCanvas = new Canvas(shaderBitmap);
122                            bitmapCanvas.drawCircle(width / 2, 0, radius, mPaint);
123                            bitmapCanvas.drawCircle(width / 2, height, radius, mPaint);
124                            BitmapShader bitmapShader = new BitmapShader(shaderBitmap,
125                                    Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
126
127                            // Gradient fill
128                            RadialGradient gradientShader = new RadialGradient(
129                                    width / 2, height / 2, radius,
130                                    new int[] { Color.RED, Color.BLUE, Color.GREEN },
131                                    null, Shader.TileMode.CLAMP);
132
133                            mPaint.setShader(new ComposeShader(gradientShader, bitmapShader,
134                                    PorterDuff.Mode.DST_IN));
135                        }
136                        canvas.drawBitmap(mBitmap, 0, 0, mPaint);
137                    }
138                })
139                // expect extremely similar rendering results between SW and HW, since there's no AA
140                .runWithComparer(new MSSIMComparer(0.98f));
141    }
142
143    @Test
144    public void testRepeatAlphaGradientShader() {
145        createTest()
146                .addCanvasClient(new CanvasClient() {
147                    Paint mPaint = new Paint();
148                    @Override
149                    public void draw(Canvas canvas, int width, int height) {
150                        if (mPaint.getShader() == null) {
151                            mPaint.setShader(new LinearGradient(0, 0, width / 2.0f, height,
152                                    Color.TRANSPARENT, Color.WHITE, Shader.TileMode.REPEAT));
153                        }
154                        canvas.drawColor(Color.WHITE);
155                        canvas.drawRect(0, 0, width, height, mPaint);
156                    }
157                })
158                .runWithVerifier(new ColorVerifier(Color.WHITE));
159    }
160
161    @Test
162    public void testClampAlphaGradientShader() {
163        createTest()
164                .addCanvasClient(new CanvasClient() {
165                    Paint mPaint = new Paint();
166                    @Override
167                    public void draw(Canvas canvas, int width, int height) {
168                        if (mPaint.getShader() == null) {
169                            mPaint.setShader(new LinearGradient(0, 0, width / 2.0f, height,
170                                    Color.TRANSPARENT, Color.WHITE, Shader.TileMode.CLAMP));
171                        }
172                        canvas.drawColor(Color.WHITE);
173                        canvas.drawRect(0, 0, width, height, mPaint);
174                    }
175                })
176                .runWithVerifier(new ColorVerifier(Color.WHITE));
177    }
178}
179