1/*
2 * Copyright (C) 2011 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 com.android.test.hwui;
18
19import android.animation.ObjectAnimator;
20import android.animation.ValueAnimator;
21import android.app.Activity;
22import android.content.res.Resources;
23import android.graphics.Bitmap;
24import android.graphics.BitmapFactory;
25import android.graphics.Matrix;
26import android.graphics.SurfaceTexture;
27import android.opengl.GLUtils;
28import android.os.Bundle;
29import android.os.Environment;
30import android.util.Log;
31import android.view.Gravity;
32import android.view.TextureView;
33import android.view.View;
34import android.view.ViewGroup;
35import android.widget.FrameLayout;
36
37import javax.microedition.khronos.egl.EGL10;
38import javax.microedition.khronos.egl.EGLConfig;
39import javax.microedition.khronos.egl.EGLContext;
40import javax.microedition.khronos.egl.EGLDisplay;
41import javax.microedition.khronos.egl.EGLSurface;
42import javax.microedition.khronos.opengles.GL;
43import java.io.BufferedOutputStream;
44import java.io.File;
45import java.io.FileNotFoundException;
46import java.io.FileOutputStream;
47import java.io.IOException;
48import java.nio.ByteBuffer;
49import java.nio.ByteOrder;
50import java.nio.FloatBuffer;
51
52import static android.opengl.GLES20.*;
53
54@SuppressWarnings({"UnusedDeclaration"})
55public class GLTextureViewActivity extends Activity implements TextureView.SurfaceTextureListener {
56    private RenderThread mRenderThread;
57    private TextureView mTextureView;
58
59    @Override
60    protected void onCreate(Bundle savedInstanceState) {
61        super.onCreate(savedInstanceState);
62
63        mTextureView = new TextureView(this);
64        mTextureView.setSurfaceTextureListener(this);
65        mTextureView.setOnClickListener(new View.OnClickListener() {
66            @Override
67            public void onClick(View v) {
68                Bitmap b = mTextureView.getBitmap(800, 800);
69                BufferedOutputStream out = null;
70                try {
71                    File dump = new File(Environment.getExternalStorageDirectory(), "out.png");
72                    out = new BufferedOutputStream(new FileOutputStream(dump));
73                    b.compress(Bitmap.CompressFormat.PNG, 100, out);
74                } catch (FileNotFoundException e) {
75                    e.printStackTrace();
76                } finally {
77                    if (out != null) try {
78                        out.close();
79                    } catch (IOException e) {
80                        e.printStackTrace();
81                    }
82                }
83            }
84        });
85
86        setContentView(mTextureView, new FrameLayout.LayoutParams(
87                ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT,
88                Gravity.CENTER));
89    }
90
91    @Override
92    public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
93        mRenderThread = new RenderThread(getResources(), surface);
94        mRenderThread.start();
95
96        mTextureView.setCameraDistance(5000);
97
98        ObjectAnimator animator = ObjectAnimator.ofFloat(mTextureView, "rotationY", 0.0f, 360.0f);
99        animator.setRepeatMode(ObjectAnimator.REVERSE);
100        animator.setRepeatCount(ObjectAnimator.INFINITE);
101        animator.setDuration(4000);
102        animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
103            @Override
104            public void onAnimationUpdate(ValueAnimator animation) {
105                mTextureView.invalidate();
106            }
107        });
108        animator.start();
109    }
110
111    @Override
112    public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
113    }
114
115    @Override
116    public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
117        mRenderThread.finish();
118        try {
119            mRenderThread.join();
120        } catch (InterruptedException e) {
121            Log.e(RenderThread.LOG_TAG, "Could not wait for render thread");
122        }
123        return true;
124    }
125
126    @Override
127    public void onSurfaceTextureUpdated(SurfaceTexture surface) {
128    }
129
130    private static class RenderThread extends Thread {
131        private static final String LOG_TAG = "GLTextureView";
132
133        static final int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
134        static final int EGL_OPENGL_ES2_BIT = 4;
135
136        private volatile boolean mFinished;
137
138        private final Resources mResources;
139        private final SurfaceTexture mSurface;
140
141        private EGL10 mEgl;
142        private EGLDisplay mEglDisplay;
143        private EGLConfig mEglConfig;
144        private EGLContext mEglContext;
145        private EGLSurface mEglSurface;
146        private GL mGL;
147
148        RenderThread(Resources resources, SurfaceTexture surface) {
149            mResources = resources;
150            mSurface = surface;
151        }
152
153        private static final String sSimpleVS =
154                "attribute vec4 position;\n" +
155                "attribute vec2 texCoords;\n" +
156                "varying vec2 outTexCoords;\n" +
157                "\nvoid main(void) {\n" +
158                "    outTexCoords = texCoords;\n" +
159                "    gl_Position = position;\n" +
160                "}\n\n";
161        private static final String sSimpleFS =
162                "precision mediump float;\n\n" +
163                "varying vec2 outTexCoords;\n" +
164                "uniform sampler2D texture;\n" +
165                "\nvoid main(void) {\n" +
166                "    gl_FragColor = texture2D(texture, outTexCoords);\n" +
167                "}\n\n";
168
169        private static final int FLOAT_SIZE_BYTES = 4;
170        private static final int TRIANGLE_VERTICES_DATA_STRIDE_BYTES = 5 * FLOAT_SIZE_BYTES;
171        private static final int TRIANGLE_VERTICES_DATA_POS_OFFSET = 0;
172        private static final int TRIANGLE_VERTICES_DATA_UV_OFFSET = 3;
173        private final float[] mTriangleVerticesData = {
174                // X, Y, Z, U, V
175                -1.0f, -1.0f, 0.0f, 0.0f, 0.0f,
176                 1.0f, -1.0f, 0.0f, 1.0f, 0.0f,
177                -1.0f,  1.0f, 0.0f, 0.0f, 1.0f,
178                 1.0f,  1.0f, 0.0f, 1.0f, 1.0f,
179        };
180
181        @Override
182        public void run() {
183            initGL();
184
185            FloatBuffer triangleVertices = ByteBuffer.allocateDirect(mTriangleVerticesData.length
186                    * FLOAT_SIZE_BYTES).order(ByteOrder.nativeOrder()).asFloatBuffer();
187            triangleVertices.put(mTriangleVerticesData).position(0);
188
189            int texture = loadTexture(R.drawable.large_photo);
190            int program = buildProgram(sSimpleVS, sSimpleFS);
191
192            int attribPosition = glGetAttribLocation(program, "position");
193            checkGlError();
194
195            int attribTexCoords = glGetAttribLocation(program, "texCoords");
196            checkGlError();
197
198            int uniformTexture = glGetUniformLocation(program, "texture");
199            checkGlError();
200
201            glBindTexture(GL_TEXTURE_2D, texture);
202            checkGlError();
203
204            glUseProgram(program);
205            checkGlError();
206
207            glEnableVertexAttribArray(attribPosition);
208            checkGlError();
209
210            glEnableVertexAttribArray(attribTexCoords);
211            checkGlError();
212
213            glUniform1i(uniformTexture, texture);
214            checkGlError();
215
216            while (!mFinished) {
217                checkCurrent();
218
219                glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
220                checkGlError();
221
222                glClear(GL_COLOR_BUFFER_BIT);
223                checkGlError();
224
225                // drawQuad
226                triangleVertices.position(TRIANGLE_VERTICES_DATA_POS_OFFSET);
227                glVertexAttribPointer(attribPosition, 3, GL_FLOAT, false,
228                        TRIANGLE_VERTICES_DATA_STRIDE_BYTES, triangleVertices);
229
230                triangleVertices.position(TRIANGLE_VERTICES_DATA_UV_OFFSET);
231                glVertexAttribPointer(attribTexCoords, 3, GL_FLOAT, false,
232                        TRIANGLE_VERTICES_DATA_STRIDE_BYTES, triangleVertices);
233
234                glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
235
236                if (!mEgl.eglSwapBuffers(mEglDisplay, mEglSurface)) {
237                    throw new RuntimeException("Cannot swap buffers");
238                }
239                checkEglError();
240
241                try {
242                    Thread.sleep(2000);
243                } catch (InterruptedException e) {
244                    // Ignore
245                }
246            }
247
248            finishGL();
249        }
250
251        private int loadTexture(int resource) {
252            int[] textures = new int[1];
253
254            glActiveTexture(GL_TEXTURE0);
255            glGenTextures(1, textures, 0);
256            checkGlError();
257
258            int texture = textures[0];
259            glBindTexture(GL_TEXTURE_2D, texture);
260            checkGlError();
261
262            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
263            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
264
265            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
266            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
267
268            Bitmap bitmap = BitmapFactory.decodeResource(mResources, resource);
269
270            GLUtils.texImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bitmap, GL_UNSIGNED_BYTE, 0);
271            checkGlError();
272
273            bitmap.recycle();
274
275            return texture;
276        }
277
278        private int buildProgram(String vertex, String fragment) {
279            int vertexShader = buildShader(vertex, GL_VERTEX_SHADER);
280            if (vertexShader == 0) return 0;
281
282            int fragmentShader = buildShader(fragment, GL_FRAGMENT_SHADER);
283            if (fragmentShader == 0) return 0;
284
285            int program = glCreateProgram();
286            glAttachShader(program, vertexShader);
287            checkGlError();
288
289            glAttachShader(program, fragmentShader);
290            checkGlError();
291
292            glLinkProgram(program);
293            checkGlError();
294
295            int[] status = new int[1];
296            glGetProgramiv(program, GL_LINK_STATUS, status, 0);
297            if (status[0] != GL_TRUE) {
298                String error = glGetProgramInfoLog(program);
299                Log.d(LOG_TAG, "Error while linking program:\n" + error);
300                glDeleteShader(vertexShader);
301                glDeleteShader(fragmentShader);
302                glDeleteProgram(program);
303                return 0;
304            }
305
306            return program;
307        }
308
309        private int buildShader(String source, int type) {
310            int shader = glCreateShader(type);
311
312            glShaderSource(shader, source);
313            checkGlError();
314
315            glCompileShader(shader);
316            checkGlError();
317
318            int[] status = new int[1];
319            glGetShaderiv(shader, GL_COMPILE_STATUS, status, 0);
320            if (status[0] != GL_TRUE) {
321                String error = glGetShaderInfoLog(shader);
322                Log.d(LOG_TAG, "Error while compiling shader:\n" + error);
323                glDeleteShader(shader);
324                return 0;
325            }
326
327            return shader;
328        }
329
330        private void checkEglError() {
331            int error = mEgl.eglGetError();
332            if (error != EGL10.EGL_SUCCESS) {
333                Log.w(LOG_TAG, "EGL error = 0x" + Integer.toHexString(error));
334            }
335        }
336
337        private void checkGlError() {
338            int error = glGetError();
339            if (error != GL_NO_ERROR) {
340                Log.w(LOG_TAG, "GL error = 0x" + Integer.toHexString(error));
341            }
342        }
343
344        private void finishGL() {
345            mEgl.eglDestroyContext(mEglDisplay, mEglContext);
346            mEgl.eglDestroySurface(mEglDisplay, mEglSurface);
347        }
348
349        private void checkCurrent() {
350            if (!mEglContext.equals(mEgl.eglGetCurrentContext()) ||
351                    !mEglSurface.equals(mEgl.eglGetCurrentSurface(EGL10.EGL_DRAW))) {
352                if (!mEgl.eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mEglContext)) {
353                    throw new RuntimeException("eglMakeCurrent failed "
354                            + GLUtils.getEGLErrorString(mEgl.eglGetError()));
355                }
356            }
357        }
358
359        private void initGL() {
360            mEgl = (EGL10) EGLContext.getEGL();
361
362            mEglDisplay = mEgl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
363            if (mEglDisplay == EGL10.EGL_NO_DISPLAY) {
364                throw new RuntimeException("eglGetDisplay failed "
365                        + GLUtils.getEGLErrorString(mEgl.eglGetError()));
366            }
367
368            int[] version = new int[2];
369            if (!mEgl.eglInitialize(mEglDisplay, version)) {
370                throw new RuntimeException("eglInitialize failed " +
371                        GLUtils.getEGLErrorString(mEgl.eglGetError()));
372            }
373
374            mEglConfig = chooseEglConfig();
375            if (mEglConfig == null) {
376                throw new RuntimeException("eglConfig not initialized");
377            }
378
379            mEglContext = createContext(mEgl, mEglDisplay, mEglConfig);
380
381            mEglSurface = mEgl.eglCreateWindowSurface(mEglDisplay, mEglConfig, mSurface, null);
382
383            if (mEglSurface == null || mEglSurface == EGL10.EGL_NO_SURFACE) {
384                int error = mEgl.eglGetError();
385                if (error == EGL10.EGL_BAD_NATIVE_WINDOW) {
386                    Log.e(LOG_TAG, "createWindowSurface returned EGL_BAD_NATIVE_WINDOW.");
387                    return;
388                }
389                throw new RuntimeException("createWindowSurface failed "
390                        + GLUtils.getEGLErrorString(error));
391            }
392
393            if (!mEgl.eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mEglContext)) {
394                throw new RuntimeException("eglMakeCurrent failed "
395                        + GLUtils.getEGLErrorString(mEgl.eglGetError()));
396            }
397
398            mGL = mEglContext.getGL();
399        }
400
401
402        EGLContext createContext(EGL10 egl, EGLDisplay eglDisplay, EGLConfig eglConfig) {
403            int[] attrib_list = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL10.EGL_NONE };
404            return egl.eglCreateContext(eglDisplay, eglConfig, EGL10.EGL_NO_CONTEXT, attrib_list);
405        }
406
407        private EGLConfig chooseEglConfig() {
408            int[] configsCount = new int[1];
409            EGLConfig[] configs = new EGLConfig[1];
410            int[] configSpec = getConfig();
411            if (!mEgl.eglChooseConfig(mEglDisplay, configSpec, configs, 1, configsCount)) {
412                throw new IllegalArgumentException("eglChooseConfig failed " +
413                        GLUtils.getEGLErrorString(mEgl.eglGetError()));
414            } else if (configsCount[0] > 0) {
415                return configs[0];
416            }
417            return null;
418        }
419
420        private int[] getConfig() {
421            return new int[] {
422                    EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
423                    EGL10.EGL_RED_SIZE, 8,
424                    EGL10.EGL_GREEN_SIZE, 8,
425                    EGL10.EGL_BLUE_SIZE, 8,
426                    EGL10.EGL_ALPHA_SIZE, 8,
427                    EGL10.EGL_DEPTH_SIZE, 0,
428                    EGL10.EGL_STENCIL_SIZE, 0,
429                    EGL10.EGL_NONE
430            };
431        }
432
433        void finish() {
434            mFinished = true;
435        }
436    }
437}
438