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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.SurfaceTexture;
26import android.opengl.GLUtils;
27import android.os.Bundle;
28import android.os.Environment;
29import android.util.Log;
30import android.view.Gravity;
31import android.view.TextureView;
32import android.view.View;
33import android.view.ViewGroup;
34import android.widget.FrameLayout;
35
36import javax.microedition.khronos.egl.EGL10;
37import javax.microedition.khronos.egl.EGLConfig;
38import javax.microedition.khronos.egl.EGLContext;
39import javax.microedition.khronos.egl.EGLDisplay;
40import javax.microedition.khronos.egl.EGLSurface;
41import javax.microedition.khronos.opengles.GL;
42import java.io.BufferedOutputStream;
43import java.io.File;
44import java.io.FileNotFoundException;
45import java.io.FileOutputStream;
46import java.io.IOException;
47import java.nio.ByteBuffer;
48import java.nio.ByteOrder;
49import java.nio.FloatBuffer;
50
51import static android.opengl.GLES20.*;
52
53@SuppressWarnings({"UnusedDeclaration"})
54public class GLTextureViewActivity extends Activity implements TextureView.SurfaceTextureListener {
55    private RenderThread mRenderThread;
56    private TextureView mTextureView;
57
58    @Override
59    protected void onCreate(Bundle savedInstanceState) {
60        super.onCreate(savedInstanceState);
61
62        mTextureView = new TextureView(this);
63        mTextureView.setSurfaceTextureListener(this);
64        mTextureView.setOnClickListener(new View.OnClickListener() {
65            @Override
66            public void onClick(View v) {
67                Bitmap b = mTextureView.getBitmap(800, 800);
68                BufferedOutputStream out = null;
69                try {
70                    File dump = new File(Environment.getExternalStorageDirectory(), "out.png");
71                    out = new BufferedOutputStream(new FileOutputStream(dump));
72                    b.compress(Bitmap.CompressFormat.PNG, 100, out);
73                } catch (FileNotFoundException e) {
74                    e.printStackTrace();
75                } finally {
76                    if (out != null) try {
77                        out.close();
78                    } catch (IOException e) {
79                        e.printStackTrace();
80                    }
81                }
82            }
83        });
84
85        setContentView(mTextureView, new FrameLayout.LayoutParams(
86                ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT,
87                Gravity.CENTER));
88    }
89
90    @Override
91    public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
92        mRenderThread = new RenderThread(getResources(), surface);
93        mRenderThread.start();
94
95        mTextureView.setCameraDistance(5000);
96
97        ObjectAnimator animator = ObjectAnimator.ofFloat(mTextureView, "rotationY", 0.0f, 360.0f);
98        animator.setRepeatMode(ObjectAnimator.REVERSE);
99        animator.setRepeatCount(ObjectAnimator.INFINITE);
100        animator.setDuration(4000);
101        animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
102            @Override
103            public void onAnimationUpdate(ValueAnimator animation) {
104                mTextureView.invalidate();
105            }
106        });
107        animator.start();
108    }
109
110    @Override
111    public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
112    }
113
114    @Override
115    public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
116        mRenderThread.finish();
117        try {
118            mRenderThread.join();
119        } catch (InterruptedException e) {
120            Log.e(RenderThread.LOG_TAG, "Could not wait for render thread");
121        }
122        return true;
123    }
124
125    @Override
126    public void onSurfaceTextureUpdated(SurfaceTexture surface) {
127    }
128
129    private static class RenderThread extends Thread {
130        private static final String LOG_TAG = "GLTextureView";
131
132        static final int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
133        static final int EGL_OPENGL_ES2_BIT = 4;
134
135        private volatile boolean mFinished;
136
137        private final Resources mResources;
138        private final SurfaceTexture mSurface;
139
140        private EGL10 mEgl;
141        private EGLDisplay mEglDisplay;
142        private EGLConfig mEglConfig;
143        private EGLContext mEglContext;
144        private EGLSurface mEglSurface;
145        private GL mGL;
146
147        RenderThread(Resources resources, SurfaceTexture surface) {
148            mResources = resources;
149            mSurface = surface;
150        }
151
152        private static final String sSimpleVS =
153                "attribute vec4 position;\n" +
154                "attribute vec2 texCoords;\n" +
155                "varying vec2 outTexCoords;\n" +
156                "\nvoid main(void) {\n" +
157                "    outTexCoords = texCoords;\n" +
158                "    gl_Position = position;\n" +
159                "}\n\n";
160        private static final String sSimpleFS =
161                "precision mediump float;\n\n" +
162                "varying vec2 outTexCoords;\n" +
163                "uniform sampler2D texture;\n" +
164                "\nvoid main(void) {\n" +
165                "    gl_FragColor = texture2D(texture, outTexCoords);\n" +
166                "}\n\n";
167
168        private static final int FLOAT_SIZE_BYTES = 4;
169        private static final int TRIANGLE_VERTICES_DATA_STRIDE_BYTES = 5 * FLOAT_SIZE_BYTES;
170        private static final int TRIANGLE_VERTICES_DATA_POS_OFFSET = 0;
171        private static final int TRIANGLE_VERTICES_DATA_UV_OFFSET = 3;
172        private final float[] mTriangleVerticesData = {
173                // X, Y, Z, U, V
174                -1.0f, -1.0f, 0.0f, 0.0f, 0.0f,
175                 1.0f, -1.0f, 0.0f, 1.0f, 0.0f,
176                -1.0f,  1.0f, 0.0f, 0.0f, 1.0f,
177                 1.0f,  1.0f, 0.0f, 1.0f, 1.0f,
178        };
179
180        @Override
181        public void run() {
182            initGL();
183
184            FloatBuffer triangleVertices = ByteBuffer.allocateDirect(mTriangleVerticesData.length
185                    * FLOAT_SIZE_BYTES).order(ByteOrder.nativeOrder()).asFloatBuffer();
186            triangleVertices.put(mTriangleVerticesData).position(0);
187
188            int texture = loadTexture(R.drawable.large_photo);
189            int program = buildProgram(sSimpleVS, sSimpleFS);
190
191            int attribPosition = glGetAttribLocation(program, "position");
192            checkGlError();
193
194            int attribTexCoords = glGetAttribLocation(program, "texCoords");
195            checkGlError();
196
197            int uniformTexture = glGetUniformLocation(program, "texture");
198            checkGlError();
199
200            glBindTexture(GL_TEXTURE_2D, texture);
201            checkGlError();
202
203            glUseProgram(program);
204            checkGlError();
205
206            glEnableVertexAttribArray(attribPosition);
207            checkGlError();
208
209            glEnableVertexAttribArray(attribTexCoords);
210            checkGlError();
211
212            glUniform1i(uniformTexture, 0);
213            checkGlError();
214
215            // drawQuad
216            triangleVertices.position(TRIANGLE_VERTICES_DATA_POS_OFFSET);
217            glVertexAttribPointer(attribPosition, 3, GL_FLOAT, false,
218                    TRIANGLE_VERTICES_DATA_STRIDE_BYTES, triangleVertices);
219            checkGlError();
220
221            triangleVertices.position(TRIANGLE_VERTICES_DATA_UV_OFFSET);
222            glVertexAttribPointer(attribTexCoords, 3, GL_FLOAT, false,
223                    TRIANGLE_VERTICES_DATA_STRIDE_BYTES, triangleVertices);
224            checkGlError();
225
226            glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
227            checkGlError();
228
229            while (!mFinished) {
230                checkCurrent();
231
232                glClear(GL_COLOR_BUFFER_BIT);
233                checkGlError();
234
235                glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
236                checkGlError();
237
238                if (!mEgl.eglSwapBuffers(mEglDisplay, mEglSurface)) {
239                    throw new RuntimeException("Cannot swap buffers");
240                }
241                checkEglError();
242
243                try {
244                    Thread.sleep(2000);
245                } catch (InterruptedException e) {
246                    // Ignore
247                }
248            }
249
250            finishGL();
251        }
252
253        private int loadTexture(int resource) {
254            int[] textures = new int[1];
255
256            glActiveTexture(GL_TEXTURE0);
257            glGenTextures(1, textures, 0);
258            checkGlError();
259
260            int texture = textures[0];
261            glBindTexture(GL_TEXTURE_2D, texture);
262            checkGlError();
263
264            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
265            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
266
267            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
268            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
269
270            Bitmap bitmap = BitmapFactory.decodeResource(mResources, resource);
271
272            GLUtils.texImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bitmap, GL_UNSIGNED_BYTE, 0);
273            checkGlError();
274
275            bitmap.recycle();
276
277            return texture;
278        }
279
280        private static int buildProgram(String vertex, String fragment) {
281            int vertexShader = buildShader(vertex, GL_VERTEX_SHADER);
282            if (vertexShader == 0) return 0;
283
284            int fragmentShader = buildShader(fragment, GL_FRAGMENT_SHADER);
285            if (fragmentShader == 0) return 0;
286
287            int program = glCreateProgram();
288            glAttachShader(program, vertexShader);
289            checkGlError();
290
291            glAttachShader(program, fragmentShader);
292            checkGlError();
293
294            glLinkProgram(program);
295            checkGlError();
296
297            int[] status = new int[1];
298            glGetProgramiv(program, GL_LINK_STATUS, status, 0);
299            if (status[0] != GL_TRUE) {
300                String error = glGetProgramInfoLog(program);
301                Log.d(LOG_TAG, "Error while linking program:\n" + error);
302                glDeleteShader(vertexShader);
303                glDeleteShader(fragmentShader);
304                glDeleteProgram(program);
305                return 0;
306            }
307
308            return program;
309        }
310
311        private static int buildShader(String source, int type) {
312            int shader = glCreateShader(type);
313
314            glShaderSource(shader, source);
315            checkGlError();
316
317            glCompileShader(shader);
318            checkGlError();
319
320            int[] status = new int[1];
321            glGetShaderiv(shader, GL_COMPILE_STATUS, status, 0);
322            if (status[0] != GL_TRUE) {
323                String error = glGetShaderInfoLog(shader);
324                Log.d(LOG_TAG, "Error while compiling shader:\n" + error);
325                glDeleteShader(shader);
326                return 0;
327            }
328
329            return shader;
330        }
331
332        private void checkEglError() {
333            int error = mEgl.eglGetError();
334            if (error != EGL10.EGL_SUCCESS) {
335                Log.w(LOG_TAG, "EGL error = 0x" + Integer.toHexString(error));
336            }
337        }
338
339        private static void checkGlError() {
340            int error = glGetError();
341            if (error != GL_NO_ERROR) {
342                Log.w(LOG_TAG, "GL error = 0x" + Integer.toHexString(error));
343            }
344        }
345
346        private void finishGL() {
347            mEgl.eglDestroyContext(mEglDisplay, mEglContext);
348            mEgl.eglDestroySurface(mEglDisplay, mEglSurface);
349        }
350
351        private void checkCurrent() {
352            if (!mEglContext.equals(mEgl.eglGetCurrentContext()) ||
353                    !mEglSurface.equals(mEgl.eglGetCurrentSurface(EGL10.EGL_DRAW))) {
354                if (!mEgl.eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mEglContext)) {
355                    throw new RuntimeException("eglMakeCurrent failed "
356                            + GLUtils.getEGLErrorString(mEgl.eglGetError()));
357                }
358            }
359        }
360
361        private void initGL() {
362            mEgl = (EGL10) EGLContext.getEGL();
363
364            mEglDisplay = mEgl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
365            if (mEglDisplay == EGL10.EGL_NO_DISPLAY) {
366                throw new RuntimeException("eglGetDisplay failed "
367                        + GLUtils.getEGLErrorString(mEgl.eglGetError()));
368            }
369
370            int[] version = new int[2];
371            if (!mEgl.eglInitialize(mEglDisplay, version)) {
372                throw new RuntimeException("eglInitialize failed " +
373                        GLUtils.getEGLErrorString(mEgl.eglGetError()));
374            }
375
376            mEglConfig = chooseEglConfig();
377            if (mEglConfig == null) {
378                throw new RuntimeException("eglConfig not initialized");
379            }
380
381            mEglContext = createContext(mEgl, mEglDisplay, mEglConfig);
382
383            mEglSurface = mEgl.eglCreateWindowSurface(mEglDisplay, mEglConfig, mSurface, null);
384
385            if (mEglSurface == null || mEglSurface == EGL10.EGL_NO_SURFACE) {
386                int error = mEgl.eglGetError();
387                if (error == EGL10.EGL_BAD_NATIVE_WINDOW) {
388                    Log.e(LOG_TAG, "createWindowSurface returned EGL_BAD_NATIVE_WINDOW.");
389                    return;
390                }
391                throw new RuntimeException("createWindowSurface failed "
392                        + GLUtils.getEGLErrorString(error));
393            }
394
395            if (!mEgl.eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mEglContext)) {
396                throw new RuntimeException("eglMakeCurrent failed "
397                        + GLUtils.getEGLErrorString(mEgl.eglGetError()));
398            }
399
400            mGL = mEglContext.getGL();
401        }
402
403
404        EGLContext createContext(EGL10 egl, EGLDisplay eglDisplay, EGLConfig eglConfig) {
405            int[] attrib_list = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL10.EGL_NONE };
406            return egl.eglCreateContext(eglDisplay, eglConfig, EGL10.EGL_NO_CONTEXT, attrib_list);
407        }
408
409        private EGLConfig chooseEglConfig() {
410            int[] configsCount = new int[1];
411            EGLConfig[] configs = new EGLConfig[1];
412            int[] configSpec = getConfig();
413            if (!mEgl.eglChooseConfig(mEglDisplay, configSpec, configs, 1, configsCount)) {
414                throw new IllegalArgumentException("eglChooseConfig failed " +
415                        GLUtils.getEGLErrorString(mEgl.eglGetError()));
416            } else if (configsCount[0] > 0) {
417                return configs[0];
418            }
419            return null;
420        }
421
422        private static int[] getConfig() {
423            return new int[] {
424                    EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
425                    EGL10.EGL_RED_SIZE, 8,
426                    EGL10.EGL_GREEN_SIZE, 8,
427                    EGL10.EGL_BLUE_SIZE, 8,
428                    EGL10.EGL_ALPHA_SIZE, 8,
429                    EGL10.EGL_DEPTH_SIZE, 0,
430                    EGL10.EGL_STENCIL_SIZE, 0,
431                    EGL10.EGL_NONE
432            };
433        }
434
435        void finish() {
436            mFinished = true;
437        }
438    }
439}
440