EglManager.cpp revision 44eb2c00861098dd3e2950d923646814b4cc57c2 
1/*
2 * Copyright (C) 2014 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 "EglManager.h"
18
19#include "../Caches.h"
20#include "../renderstate/RenderState.h"
21#include "RenderThread.h"
22
23#include <cutils/log.h>
24#include <cutils/properties.h>
25
26#define PROPERTY_RENDER_DIRTY_REGIONS "debug.hwui.render_dirty_regions"
27#define GLES_VERSION 2
28
29// Android-specific addition that is used to show when frames began in systrace
30EGLAPI void EGLAPIENTRY eglBeginFrame(EGLDisplay dpy, EGLSurface surface);
31
32namespace android {
33namespace uirenderer {
34namespace renderthread {
35
36#define ERROR_CASE(x) case x: return #x;
37static const char* egl_error_str(EGLint error) {
38    switch (error) {
39        ERROR_CASE(EGL_SUCCESS)
40        ERROR_CASE(EGL_NOT_INITIALIZED)
41        ERROR_CASE(EGL_BAD_ACCESS)
42        ERROR_CASE(EGL_BAD_ALLOC)
43        ERROR_CASE(EGL_BAD_ATTRIBUTE)
44        ERROR_CASE(EGL_BAD_CONFIG)
45        ERROR_CASE(EGL_BAD_CONTEXT)
46        ERROR_CASE(EGL_BAD_CURRENT_SURFACE)
47        ERROR_CASE(EGL_BAD_DISPLAY)
48        ERROR_CASE(EGL_BAD_MATCH)
49        ERROR_CASE(EGL_BAD_NATIVE_PIXMAP)
50        ERROR_CASE(EGL_BAD_NATIVE_WINDOW)
51        ERROR_CASE(EGL_BAD_PARAMETER)
52        ERROR_CASE(EGL_BAD_SURFACE)
53        ERROR_CASE(EGL_CONTEXT_LOST)
54    default:
55        return "Unknown error";
56    }
57}
58static const char* egl_error_str() {
59    return egl_error_str(eglGetError());
60}
61
62static bool load_dirty_regions_property() {
63    char buf[PROPERTY_VALUE_MAX];
64    int len = property_get(PROPERTY_RENDER_DIRTY_REGIONS, buf, "true");
65    return !strncasecmp("true", buf, len);
66}
67
68EglManager::EglManager(RenderThread& thread)
69        : mRenderThread(thread)
70        , mEglDisplay(EGL_NO_DISPLAY)
71        , mEglConfig(nullptr)
72        , mEglContext(EGL_NO_CONTEXT)
73        , mPBufferSurface(EGL_NO_SURFACE)
74        , mAllowPreserveBuffer(load_dirty_regions_property())
75        , mCurrentSurface(EGL_NO_SURFACE)
76        , mAtlasMap(nullptr)
77        , mAtlasMapSize(0)
78        , mInFrame(false) {
79    mCanSetPreserveBuffer = mAllowPreserveBuffer;
80    ALOGD("Use EGL_SWAP_BEHAVIOR_PRESERVED: %s", mAllowPreserveBuffer ? "true" : "false");
81}
82
83void EglManager::initialize() {
84    if (hasEglContext()) return;
85
86    ATRACE_NAME("Creating EGLContext");
87
88    mEglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
89    LOG_ALWAYS_FATAL_IF(mEglDisplay == EGL_NO_DISPLAY,
90            "Failed to get EGL_DEFAULT_DISPLAY! err=%s", egl_error_str());
91
92    EGLint major, minor;
93    LOG_ALWAYS_FATAL_IF(eglInitialize(mEglDisplay, &major, &minor) == EGL_FALSE,
94            "Failed to initialize display %p! err=%s", mEglDisplay, egl_error_str());
95
96    ALOGI("Initialized EGL, version %d.%d", (int)major, (int)minor);
97
98    loadConfig();
99    createContext();
100    usePBufferSurface();
101    mRenderThread.renderState().onGLContextCreated();
102    initAtlas();
103}
104
105bool EglManager::hasEglContext() {
106    return mEglDisplay != EGL_NO_DISPLAY;
107}
108
109void EglManager::requireGlContext() {
110    LOG_ALWAYS_FATAL_IF(mEglDisplay == EGL_NO_DISPLAY, "No EGL context");
111
112    if (!mInFrame) {
113        // We can't be certain about the state of the current surface (whether
114        // or not it is destroyed, for example), so err on the side of using
115        // the pbuffer surface which we fully control
116        usePBufferSurface();
117    }
118}
119
120void EglManager::loadConfig() {
121    EGLint swapBehavior = mCanSetPreserveBuffer ? EGL_SWAP_BEHAVIOR_PRESERVED_BIT : 0;
122    EGLint attribs[] = {
123            EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
124            EGL_RED_SIZE, 8,
125            EGL_GREEN_SIZE, 8,
126            EGL_BLUE_SIZE, 8,
127            EGL_ALPHA_SIZE, 8,
128            EGL_DEPTH_SIZE, 0,
129            EGL_CONFIG_CAVEAT, EGL_NONE,
130            EGL_STENCIL_SIZE, Stencil::getStencilSize(),
131            EGL_SURFACE_TYPE, EGL_WINDOW_BIT | swapBehavior,
132            EGL_NONE
133    };
134
135    EGLint num_configs = 1;
136    if (!eglChooseConfig(mEglDisplay, attribs, &mEglConfig, num_configs, &num_configs)
137            || num_configs != 1) {
138        // Failed to get a valid config
139        if (mCanSetPreserveBuffer) {
140            ALOGW("Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...");
141            // Try again without dirty regions enabled
142            mCanSetPreserveBuffer = false;
143            loadConfig();
144        } else {
145            LOG_ALWAYS_FATAL("Failed to choose config, error = %s", egl_error_str());
146        }
147    }
148}
149
150void EglManager::createContext() {
151    EGLint attribs[] = { EGL_CONTEXT_CLIENT_VERSION, GLES_VERSION, EGL_NONE };
152    mEglContext = eglCreateContext(mEglDisplay, mEglConfig, EGL_NO_CONTEXT, attribs);
153    LOG_ALWAYS_FATAL_IF(mEglContext == EGL_NO_CONTEXT,
154        "Failed to create context, error = %s", egl_error_str());
155}
156
157void EglManager::setTextureAtlas(const sp<GraphicBuffer>& buffer,
158        int64_t* map, size_t mapSize) {
159
160    // Already initialized
161    if (mAtlasBuffer.get()) {
162        ALOGW("Multiple calls to setTextureAtlas!");
163        delete map;
164        return;
165    }
166
167    mAtlasBuffer = buffer;
168    mAtlasMap = map;
169    mAtlasMapSize = mapSize;
170
171    if (hasEglContext()) {
172        usePBufferSurface();
173        initAtlas();
174    }
175}
176
177void EglManager::initAtlas() {
178    if (mAtlasBuffer.get()) {
179        mRenderThread.renderState().assetAtlas().init(mAtlasBuffer,
180                mAtlasMap, mAtlasMapSize);
181    }
182}
183
184void EglManager::usePBufferSurface() {
185    LOG_ALWAYS_FATAL_IF(mEglDisplay == EGL_NO_DISPLAY,
186            "usePBufferSurface() called on uninitialized GlobalContext!");
187
188    if (mPBufferSurface == EGL_NO_SURFACE) {
189        EGLint attribs[] = { EGL_WIDTH, 1, EGL_HEIGHT, 1, EGL_NONE };
190        mPBufferSurface = eglCreatePbufferSurface(mEglDisplay, mEglConfig, attribs);
191    }
192    makeCurrent(mPBufferSurface);
193}
194
195EGLSurface EglManager::createSurface(EGLNativeWindowType window) {
196    initialize();
197    EGLSurface surface = eglCreateWindowSurface(mEglDisplay, mEglConfig, window, nullptr);
198    LOG_ALWAYS_FATAL_IF(surface == EGL_NO_SURFACE,
199            "Failed to create EGLSurface for window %p, eglErr = %s",
200            (void*) window, egl_error_str());
201    return surface;
202}
203
204void EglManager::destroySurface(EGLSurface surface) {
205    if (isCurrent(surface)) {
206        makeCurrent(EGL_NO_SURFACE);
207    }
208    if (!eglDestroySurface(mEglDisplay, surface)) {
209        ALOGW("Failed to destroy surface %p, error=%s", (void*)surface, egl_error_str());
210    }
211}
212
213void EglManager::destroy() {
214    if (mEglDisplay == EGL_NO_DISPLAY) return;
215
216    usePBufferSurface();
217
218    mRenderThread.renderState().onGLContextDestroyed();
219    eglDestroyContext(mEglDisplay, mEglContext);
220    eglDestroySurface(mEglDisplay, mPBufferSurface);
221    eglMakeCurrent(mEglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
222    eglTerminate(mEglDisplay);
223    eglReleaseThread();
224
225    mEglDisplay = EGL_NO_DISPLAY;
226    mEglContext = EGL_NO_CONTEXT;
227    mPBufferSurface = EGL_NO_SURFACE;
228    mCurrentSurface = EGL_NO_SURFACE;
229}
230
231bool EglManager::makeCurrent(EGLSurface surface) {
232    if (isCurrent(surface)) return false;
233
234    if (surface == EGL_NO_SURFACE) {
235        // If we are setting EGL_NO_SURFACE we don't care about any of the potential
236        // return errors, which would only happen if mEglDisplay had already been
237        // destroyed in which case the current context is already NO_CONTEXT
238        eglMakeCurrent(mEglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
239    } else if (!eglMakeCurrent(mEglDisplay, surface, surface, mEglContext)) {
240        LOG_ALWAYS_FATAL("Failed to make current on surface %p, error=%s",
241                (void*)surface, egl_error_str());
242    }
243    mCurrentSurface = surface;
244    return true;
245}
246
247void EglManager::beginFrame(EGLSurface surface, EGLint* width, EGLint* height) {
248    LOG_ALWAYS_FATAL_IF(surface == EGL_NO_SURFACE,
249            "Tried to beginFrame on EGL_NO_SURFACE!");
250    makeCurrent(surface);
251    if (width) {
252        eglQuerySurface(mEglDisplay, surface, EGL_WIDTH, width);
253    }
254    if (height) {
255        eglQuerySurface(mEglDisplay, surface, EGL_HEIGHT, height);
256    }
257    eglBeginFrame(mEglDisplay, surface);
258    mInFrame = true;
259}
260
261bool EglManager::swapBuffers(EGLSurface surface) {
262    mInFrame = false;
263    eglSwapBuffers(mEglDisplay, surface);
264    EGLint err = eglGetError();
265    if (CC_LIKELY(err == EGL_SUCCESS)) {
266        return true;
267    }
268    if (err == EGL_BAD_SURFACE) {
269        // For some reason our surface was destroyed out from under us
270        // This really shouldn't happen, but if it does we can recover easily
271        // by just not trying to use the surface anymore
272        ALOGW("swapBuffers encountered EGL_BAD_SURFACE on %p, halting rendering...", surface);
273        return false;
274    }
275    LOG_ALWAYS_FATAL("Encountered EGL error %d %s during rendering",
276            err, egl_error_str(err));
277    // Impossible to hit this, but the compiler doesn't know that
278    return false;
279}
280
281void EglManager::cancelFrame() {
282    mInFrame = false;
283}
284
285bool EglManager::setPreserveBuffer(EGLSurface surface, bool preserve) {
286    if (CC_UNLIKELY(!mAllowPreserveBuffer)) return false;
287
288    bool preserved = false;
289    if (mCanSetPreserveBuffer) {
290        preserved = eglSurfaceAttrib(mEglDisplay, surface, EGL_SWAP_BEHAVIOR,
291                preserve ? EGL_BUFFER_PRESERVED : EGL_BUFFER_DESTROYED);
292        if (CC_UNLIKELY(!preserved)) {
293            ALOGW("Failed to set EGL_SWAP_BEHAVIOR on surface %p, error=%s",
294                    (void*) surface, egl_error_str());
295        }
296    }
297    if (CC_UNLIKELY(!preserved)) {
298        // Maybe it's already set?
299        EGLint swapBehavior;
300        if (eglQuerySurface(mEglDisplay, surface, EGL_SWAP_BEHAVIOR, &swapBehavior)) {
301            preserved = (swapBehavior == EGL_BUFFER_PRESERVED);
302        } else {
303            ALOGW("Failed to query EGL_SWAP_BEHAVIOR on surface %p, error=%p",
304                                (void*) surface, egl_error_str());
305        }
306    }
307
308    return preserved;
309}
310
311} /* namespace renderthread */
312} /* namespace uirenderer */
313} /* namespace android */
314