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 <EGL/eglext.h>
20 #include <GLES/gl.h>
21 #include <cutils/properties.h>
22 #include <log/log.h>
23 #include <sync/sync.h>
24 #include <utils/Trace.h>
25
26 #include <string>
27 #include <vector>
28
29 #include "Frame.h"
30 #include "Properties.h"
31 #include "utils/Color.h"
32 #include "utils/StringUtils.h"
33
34 #define GLES_VERSION 2
35
36 // Android-specific addition that is used to show when frames began in systrace
37 EGLAPI void EGLAPIENTRY eglBeginFrame(EGLDisplay dpy, EGLSurface surface);
38
39 namespace android {
40 namespace uirenderer {
41 namespace renderthread {
42
43 #define ERROR_CASE(x) \
44 case x: \
45 return #x;
egl_error_str(EGLint error)46 static const char* egl_error_str(EGLint error) {
47 switch (error) {
48 ERROR_CASE(EGL_SUCCESS)
49 ERROR_CASE(EGL_NOT_INITIALIZED)
50 ERROR_CASE(EGL_BAD_ACCESS)
51 ERROR_CASE(EGL_BAD_ALLOC)
52 ERROR_CASE(EGL_BAD_ATTRIBUTE)
53 ERROR_CASE(EGL_BAD_CONFIG)
54 ERROR_CASE(EGL_BAD_CONTEXT)
55 ERROR_CASE(EGL_BAD_CURRENT_SURFACE)
56 ERROR_CASE(EGL_BAD_DISPLAY)
57 ERROR_CASE(EGL_BAD_MATCH)
58 ERROR_CASE(EGL_BAD_NATIVE_PIXMAP)
59 ERROR_CASE(EGL_BAD_NATIVE_WINDOW)
60 ERROR_CASE(EGL_BAD_PARAMETER)
61 ERROR_CASE(EGL_BAD_SURFACE)
62 ERROR_CASE(EGL_CONTEXT_LOST)
63 default:
64 return "Unknown error";
65 }
66 }
eglErrorString()67 const char* EglManager::eglErrorString() {
68 return egl_error_str(eglGetError());
69 }
70
71 static struct {
72 bool bufferAge = false;
73 bool setDamage = false;
74 bool noConfigContext = false;
75 bool pixelFormatFloat = false;
76 bool glColorSpace = false;
77 bool scRGB = false;
78 bool displayP3 = false;
79 bool contextPriority = false;
80 bool surfacelessContext = false;
81 bool nativeFenceSync = false;
82 bool fenceSync = false;
83 bool waitSync = false;
84 } EglExtensions;
85
EglManager()86 EglManager::EglManager()
87 : mEglDisplay(EGL_NO_DISPLAY)
88 , mEglConfig(nullptr)
89 , mEglConfigWideGamut(nullptr)
90 , mEglContext(EGL_NO_CONTEXT)
91 , mPBufferSurface(EGL_NO_SURFACE)
92 , mCurrentSurface(EGL_NO_SURFACE)
93 , mHasWideColorGamutSupport(false) {}
94
~EglManager()95 EglManager::~EglManager() {
96 if (hasEglContext()) {
97 ALOGW("~EglManager() leaked an EGL context");
98 }
99 }
100
initialize()101 void EglManager::initialize() {
102 if (hasEglContext()) return;
103
104 ATRACE_NAME("Creating EGLContext");
105
106 mEglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
107 LOG_ALWAYS_FATAL_IF(mEglDisplay == EGL_NO_DISPLAY, "Failed to get EGL_DEFAULT_DISPLAY! err=%s",
108 eglErrorString());
109
110 EGLint major, minor;
111 LOG_ALWAYS_FATAL_IF(eglInitialize(mEglDisplay, &major, &minor) == EGL_FALSE,
112 "Failed to initialize display %p! err=%s", mEglDisplay, eglErrorString());
113
114 ALOGV("Initialized EGL, version %d.%d", (int)major, (int)minor);
115
116 initExtensions();
117
118 // Now that extensions are loaded, pick a swap behavior
119 if (Properties::enablePartialUpdates) {
120 // An Adreno driver bug is causing rendering problems for SkiaGL with
121 // buffer age swap behavior (b/31957043). To temporarily workaround,
122 // we will use preserved swap behavior.
123 if (Properties::useBufferAge && EglExtensions.bufferAge) {
124 mSwapBehavior = SwapBehavior::BufferAge;
125 } else {
126 mSwapBehavior = SwapBehavior::Preserved;
127 }
128 }
129
130 loadConfigs();
131 createContext();
132 createPBufferSurface();
133 makeCurrent(mPBufferSurface, nullptr, /* force */ true);
134
135 skcms_Matrix3x3 wideColorGamut;
136 LOG_ALWAYS_FATAL_IF(!DeviceInfo::get()->getWideColorSpace()->toXYZD50(&wideColorGamut),
137 "Could not get gamut matrix from wideColorSpace");
138 bool hasWideColorSpaceExtension = false;
139 if (memcmp(&wideColorGamut, &SkNamedGamut::kDCIP3, sizeof(wideColorGamut)) == 0) {
140 hasWideColorSpaceExtension = EglExtensions.displayP3;
141 } else if (memcmp(&wideColorGamut, &SkNamedGamut::kSRGB, sizeof(wideColorGamut)) == 0) {
142 hasWideColorSpaceExtension = EglExtensions.scRGB;
143 } else {
144 LOG_ALWAYS_FATAL("Unsupported wide color space.");
145 }
146 mHasWideColorGamutSupport = EglExtensions.glColorSpace && hasWideColorSpaceExtension &&
147 mEglConfigWideGamut != EGL_NO_CONFIG_KHR;
148 }
149
load8BitsConfig(EGLDisplay display,EglManager::SwapBehavior swapBehavior)150 EGLConfig EglManager::load8BitsConfig(EGLDisplay display, EglManager::SwapBehavior swapBehavior) {
151 EGLint eglSwapBehavior =
152 (swapBehavior == SwapBehavior::Preserved) ? EGL_SWAP_BEHAVIOR_PRESERVED_BIT : 0;
153 EGLint attribs[] = {EGL_RENDERABLE_TYPE,
154 EGL_OPENGL_ES2_BIT,
155 EGL_RED_SIZE,
156 8,
157 EGL_GREEN_SIZE,
158 8,
159 EGL_BLUE_SIZE,
160 8,
161 EGL_ALPHA_SIZE,
162 8,
163 EGL_DEPTH_SIZE,
164 0,
165 EGL_CONFIG_CAVEAT,
166 EGL_NONE,
167 EGL_STENCIL_SIZE,
168 STENCIL_BUFFER_SIZE,
169 EGL_SURFACE_TYPE,
170 EGL_WINDOW_BIT | eglSwapBehavior,
171 EGL_NONE};
172 EGLConfig config = EGL_NO_CONFIG_KHR;
173 EGLint numConfigs = 1;
174 if (!eglChooseConfig(display, attribs, &config, numConfigs, &numConfigs) || numConfigs != 1) {
175 return EGL_NO_CONFIG_KHR;
176 }
177 return config;
178 }
179
loadFP16Config(EGLDisplay display,SwapBehavior swapBehavior)180 EGLConfig EglManager::loadFP16Config(EGLDisplay display, SwapBehavior swapBehavior) {
181 EGLint eglSwapBehavior =
182 (swapBehavior == SwapBehavior::Preserved) ? EGL_SWAP_BEHAVIOR_PRESERVED_BIT : 0;
183 // If we reached this point, we have a valid swap behavior
184 EGLint attribs[] = {EGL_RENDERABLE_TYPE,
185 EGL_OPENGL_ES2_BIT,
186 EGL_COLOR_COMPONENT_TYPE_EXT,
187 EGL_COLOR_COMPONENT_TYPE_FLOAT_EXT,
188 EGL_RED_SIZE,
189 16,
190 EGL_GREEN_SIZE,
191 16,
192 EGL_BLUE_SIZE,
193 16,
194 EGL_ALPHA_SIZE,
195 16,
196 EGL_DEPTH_SIZE,
197 0,
198 EGL_STENCIL_SIZE,
199 STENCIL_BUFFER_SIZE,
200 EGL_SURFACE_TYPE,
201 EGL_WINDOW_BIT | eglSwapBehavior,
202 EGL_NONE};
203 EGLConfig config = EGL_NO_CONFIG_KHR;
204 EGLint numConfigs = 1;
205 if (!eglChooseConfig(display, attribs, &config, numConfigs, &numConfigs) || numConfigs != 1) {
206 return EGL_NO_CONFIG_KHR;
207 }
208 return config;
209 }
210
initExtensions()211 void EglManager::initExtensions() {
212 auto extensions = StringUtils::split(eglQueryString(mEglDisplay, EGL_EXTENSIONS));
213
214 // For our purposes we don't care if EGL_BUFFER_AGE is a result of
215 // EGL_EXT_buffer_age or EGL_KHR_partial_update as our usage is covered
216 // under EGL_KHR_partial_update and we don't need the expanded scope
217 // that EGL_EXT_buffer_age provides.
218 EglExtensions.bufferAge =
219 extensions.has("EGL_EXT_buffer_age") || extensions.has("EGL_KHR_partial_update");
220 EglExtensions.setDamage = extensions.has("EGL_KHR_partial_update");
221 LOG_ALWAYS_FATAL_IF(!extensions.has("EGL_KHR_swap_buffers_with_damage"),
222 "Missing required extension EGL_KHR_swap_buffers_with_damage");
223
224 EglExtensions.glColorSpace = extensions.has("EGL_KHR_gl_colorspace");
225 EglExtensions.noConfigContext = extensions.has("EGL_KHR_no_config_context");
226 EglExtensions.pixelFormatFloat = extensions.has("EGL_EXT_pixel_format_float");
227 EglExtensions.scRGB = extensions.has("EGL_EXT_gl_colorspace_scrgb");
228 EglExtensions.displayP3 = extensions.has("EGL_EXT_gl_colorspace_display_p3_passthrough");
229 EglExtensions.contextPriority = extensions.has("EGL_IMG_context_priority");
230 EglExtensions.surfacelessContext = extensions.has("EGL_KHR_surfaceless_context");
231 EglExtensions.nativeFenceSync = extensions.has("EGL_ANDROID_native_fence_sync");
232 EglExtensions.fenceSync = extensions.has("EGL_KHR_fence_sync");
233 EglExtensions.waitSync = extensions.has("EGL_KHR_wait_sync");
234 }
235
hasEglContext()236 bool EglManager::hasEglContext() {
237 return mEglDisplay != EGL_NO_DISPLAY;
238 }
239
loadConfigs()240 void EglManager::loadConfigs() {
241 // Note: The default pixel format is RGBA_8888, when other formats are
242 // available, we should check the target pixel format and configure the
243 // attributes list properly.
244 mEglConfig = load8BitsConfig(mEglDisplay, mSwapBehavior);
245 if (mEglConfig == EGL_NO_CONFIG_KHR) {
246 if (mSwapBehavior == SwapBehavior::Preserved) {
247 // Try again without dirty regions enabled
248 ALOGW("Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...");
249 mSwapBehavior = SwapBehavior::Discard;
250 mEglConfig = load8BitsConfig(mEglDisplay, mSwapBehavior);
251 } else {
252 // Failed to get a valid config
253 LOG_ALWAYS_FATAL("Failed to choose config, error = %s", eglErrorString());
254 }
255 }
256 SkColorType wideColorType = DeviceInfo::get()->getWideColorType();
257
258 // When we reach this point, we have a valid swap behavior
259 if (wideColorType == SkColorType::kRGBA_F16_SkColorType && EglExtensions.pixelFormatFloat) {
260 mEglConfigWideGamut = loadFP16Config(mEglDisplay, mSwapBehavior);
261 if (mEglConfigWideGamut == EGL_NO_CONFIG_KHR) {
262 ALOGE("Device claims wide gamut support, cannot find matching config, error = %s",
263 eglErrorString());
264 EglExtensions.pixelFormatFloat = false;
265 }
266 } else if (wideColorType == SkColorType::kN32_SkColorType) {
267 mEglConfigWideGamut = load8BitsConfig(mEglDisplay, mSwapBehavior);
268 }
269 }
270
createContext()271 void EglManager::createContext() {
272 std::vector<EGLint> contextAttributes;
273 contextAttributes.reserve(5);
274 contextAttributes.push_back(EGL_CONTEXT_CLIENT_VERSION);
275 contextAttributes.push_back(GLES_VERSION);
276 if (Properties::contextPriority != 0 && EglExtensions.contextPriority) {
277 contextAttributes.push_back(EGL_CONTEXT_PRIORITY_LEVEL_IMG);
278 contextAttributes.push_back(Properties::contextPriority);
279 }
280 contextAttributes.push_back(EGL_NONE);
281 mEglContext = eglCreateContext(
282 mEglDisplay, EglExtensions.noConfigContext ? ((EGLConfig) nullptr) : mEglConfig,
283 EGL_NO_CONTEXT, contextAttributes.data());
284 LOG_ALWAYS_FATAL_IF(mEglContext == EGL_NO_CONTEXT, "Failed to create context, error = %s",
285 eglErrorString());
286 }
287
createPBufferSurface()288 void EglManager::createPBufferSurface() {
289 LOG_ALWAYS_FATAL_IF(mEglDisplay == EGL_NO_DISPLAY,
290 "usePBufferSurface() called on uninitialized GlobalContext!");
291
292 if (mPBufferSurface == EGL_NO_SURFACE && !EglExtensions.surfacelessContext) {
293 EGLint attribs[] = {EGL_WIDTH, 1, EGL_HEIGHT, 1, EGL_NONE};
294 mPBufferSurface = eglCreatePbufferSurface(mEglDisplay, mEglConfig, attribs);
295 LOG_ALWAYS_FATAL_IF(mPBufferSurface == EGL_NO_SURFACE,
296 "Failed to create a pixel buffer display=%p, "
297 "mEglConfig=%p, error=%s",
298 mEglDisplay, mEglConfig, eglErrorString());
299 }
300 }
301
createSurface(EGLNativeWindowType window,ColorMode colorMode,sk_sp<SkColorSpace> colorSpace)302 Result<EGLSurface, EGLint> EglManager::createSurface(EGLNativeWindowType window,
303 ColorMode colorMode,
304 sk_sp<SkColorSpace> colorSpace) {
305 LOG_ALWAYS_FATAL_IF(!hasEglContext(), "Not initialized");
306
307 bool wideColorGamut = colorMode == ColorMode::WideColorGamut && mHasWideColorGamutSupport &&
308 EglExtensions.noConfigContext;
309
310 // The color space we want to use depends on whether linear blending is turned
311 // on and whether the app has requested wide color gamut rendering. When wide
312 // color gamut rendering is off, the app simply renders in the display's native
313 // color gamut.
314 //
315 // When wide gamut rendering is off:
316 // - Blending is done by default in gamma space, which requires using a
317 // linear EGL color space (the GPU uses the color values as is)
318 // - If linear blending is on, we must use the non-linear EGL color space
319 // (the GPU will perform sRGB to linear and linear to SRGB conversions
320 // before and after blending)
321 //
322 // When wide gamut rendering is on we cannot rely on the GPU performing
323 // linear blending for us. We use two different color spaces to tag the
324 // surface appropriately for SurfaceFlinger:
325 // - Gamma blending (default) requires the use of the non-linear color space
326 // - Linear blending requires the use of the linear color space
327
328 // Not all Android targets support the EGL_GL_COLORSPACE_KHR extension
329 // We insert to placeholders to set EGL_GL_COLORSPACE_KHR and its value.
330 // According to section 3.4.1 of the EGL specification, the attributes
331 // list is considered empty if the first entry is EGL_NONE
332 EGLint attribs[] = {EGL_NONE, EGL_NONE, EGL_NONE};
333
334 if (EglExtensions.glColorSpace) {
335 attribs[0] = EGL_GL_COLORSPACE_KHR;
336 if (wideColorGamut) {
337 skcms_Matrix3x3 colorGamut;
338 LOG_ALWAYS_FATAL_IF(!colorSpace->toXYZD50(&colorGamut),
339 "Could not get gamut matrix from color space");
340 if (memcmp(&colorGamut, &SkNamedGamut::kDCIP3, sizeof(colorGamut)) == 0) {
341 attribs[1] = EGL_GL_COLORSPACE_DISPLAY_P3_PASSTHROUGH_EXT;
342 } else if (memcmp(&colorGamut, &SkNamedGamut::kSRGB, sizeof(colorGamut)) == 0) {
343 attribs[1] = EGL_GL_COLORSPACE_SCRGB_EXT;
344 } else {
345 LOG_ALWAYS_FATAL("Unreachable: unsupported wide color space.");
346 }
347 } else {
348 attribs[1] = EGL_GL_COLORSPACE_LINEAR_KHR;
349 }
350 }
351
352 EGLSurface surface = eglCreateWindowSurface(
353 mEglDisplay, wideColorGamut ? mEglConfigWideGamut : mEglConfig, window, attribs);
354 if (surface == EGL_NO_SURFACE) {
355 return Error<EGLint>{eglGetError()};
356 }
357
358 if (mSwapBehavior != SwapBehavior::Preserved) {
359 LOG_ALWAYS_FATAL_IF(eglSurfaceAttrib(mEglDisplay, surface, EGL_SWAP_BEHAVIOR,
360 EGL_BUFFER_DESTROYED) == EGL_FALSE,
361 "Failed to set swap behavior to destroyed for window %p, eglErr = %s",
362 (void*)window, eglErrorString());
363 }
364
365 return surface;
366 }
367
destroySurface(EGLSurface surface)368 void EglManager::destroySurface(EGLSurface surface) {
369 if (isCurrent(surface)) {
370 makeCurrent(EGL_NO_SURFACE);
371 }
372 if (!eglDestroySurface(mEglDisplay, surface)) {
373 ALOGW("Failed to destroy surface %p, error=%s", (void*)surface, eglErrorString());
374 }
375 }
376
destroy()377 void EglManager::destroy() {
378 if (mEglDisplay == EGL_NO_DISPLAY) return;
379
380 eglDestroyContext(mEglDisplay, mEglContext);
381 if (mPBufferSurface != EGL_NO_SURFACE) {
382 eglDestroySurface(mEglDisplay, mPBufferSurface);
383 }
384 eglMakeCurrent(mEglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
385 eglTerminate(mEglDisplay);
386 eglReleaseThread();
387
388 mEglDisplay = EGL_NO_DISPLAY;
389 mEglContext = EGL_NO_CONTEXT;
390 mPBufferSurface = EGL_NO_SURFACE;
391 mCurrentSurface = EGL_NO_SURFACE;
392 }
393
makeCurrent(EGLSurface surface,EGLint * errOut,bool force)394 bool EglManager::makeCurrent(EGLSurface surface, EGLint* errOut, bool force) {
395 if (!force && isCurrent(surface)) return false;
396
397 if (surface == EGL_NO_SURFACE) {
398 // Ensure we always have a valid surface & context
399 surface = mPBufferSurface;
400 }
401 if (!eglMakeCurrent(mEglDisplay, surface, surface, mEglContext)) {
402 if (errOut) {
403 *errOut = eglGetError();
404 ALOGW("Failed to make current on surface %p, error=%s", (void*)surface,
405 egl_error_str(*errOut));
406 } else {
407 LOG_ALWAYS_FATAL("Failed to make current on surface %p, error=%s", (void*)surface,
408 eglErrorString());
409 }
410 }
411 mCurrentSurface = surface;
412 if (Properties::disableVsync) {
413 eglSwapInterval(mEglDisplay, 0);
414 }
415 return true;
416 }
417
queryBufferAge(EGLSurface surface)418 EGLint EglManager::queryBufferAge(EGLSurface surface) {
419 switch (mSwapBehavior) {
420 case SwapBehavior::Discard:
421 return 0;
422 case SwapBehavior::Preserved:
423 return 1;
424 case SwapBehavior::BufferAge:
425 EGLint bufferAge;
426 eglQuerySurface(mEglDisplay, surface, EGL_BUFFER_AGE_EXT, &bufferAge);
427 return bufferAge;
428 }
429 return 0;
430 }
431
beginFrame(EGLSurface surface)432 Frame EglManager::beginFrame(EGLSurface surface) {
433 LOG_ALWAYS_FATAL_IF(surface == EGL_NO_SURFACE, "Tried to beginFrame on EGL_NO_SURFACE!");
434 makeCurrent(surface);
435 Frame frame;
436 frame.mSurface = surface;
437 eglQuerySurface(mEglDisplay, surface, EGL_WIDTH, &frame.mWidth);
438 eglQuerySurface(mEglDisplay, surface, EGL_HEIGHT, &frame.mHeight);
439 frame.mBufferAge = queryBufferAge(surface);
440 eglBeginFrame(mEglDisplay, surface);
441 return frame;
442 }
443
damageFrame(const Frame & frame,const SkRect & dirty)444 void EglManager::damageFrame(const Frame& frame, const SkRect& dirty) {
445 #ifdef EGL_KHR_partial_update
446 if (EglExtensions.setDamage && mSwapBehavior == SwapBehavior::BufferAge) {
447 EGLint rects[4];
448 frame.map(dirty, rects);
449 if (!eglSetDamageRegionKHR(mEglDisplay, frame.mSurface, rects, 1)) {
450 LOG_ALWAYS_FATAL("Failed to set damage region on surface %p, error=%s",
451 (void*)frame.mSurface, eglErrorString());
452 }
453 }
454 #endif
455 }
456
damageRequiresSwap()457 bool EglManager::damageRequiresSwap() {
458 return EglExtensions.setDamage && mSwapBehavior == SwapBehavior::BufferAge;
459 }
460
swapBuffers(const Frame & frame,const SkRect & screenDirty)461 bool EglManager::swapBuffers(const Frame& frame, const SkRect& screenDirty) {
462 if (CC_UNLIKELY(Properties::waitForGpuCompletion)) {
463 ATRACE_NAME("Finishing GPU work");
464 fence();
465 }
466
467 EGLint rects[4];
468 frame.map(screenDirty, rects);
469 eglSwapBuffersWithDamageKHR(mEglDisplay, frame.mSurface, rects, screenDirty.isEmpty() ? 0 : 1);
470
471 EGLint err = eglGetError();
472 if (CC_LIKELY(err == EGL_SUCCESS)) {
473 return true;
474 }
475 if (err == EGL_BAD_SURFACE || err == EGL_BAD_NATIVE_WINDOW) {
476 // For some reason our surface was destroyed out from under us
477 // This really shouldn't happen, but if it does we can recover easily
478 // by just not trying to use the surface anymore
479 ALOGW("swapBuffers encountered EGL error %d on %p, halting rendering...", err,
480 frame.mSurface);
481 return false;
482 }
483 LOG_ALWAYS_FATAL("Encountered EGL error %d %s during rendering", err, egl_error_str(err));
484 // Impossible to hit this, but the compiler doesn't know that
485 return false;
486 }
487
fence()488 void EglManager::fence() {
489 EGLSyncKHR fence = eglCreateSyncKHR(mEglDisplay, EGL_SYNC_FENCE_KHR, NULL);
490 eglClientWaitSyncKHR(mEglDisplay, fence, EGL_SYNC_FLUSH_COMMANDS_BIT_KHR, EGL_FOREVER_KHR);
491 eglDestroySyncKHR(mEglDisplay, fence);
492 }
493
setPreserveBuffer(EGLSurface surface,bool preserve)494 bool EglManager::setPreserveBuffer(EGLSurface surface, bool preserve) {
495 if (mSwapBehavior != SwapBehavior::Preserved) return false;
496
497 bool preserved = eglSurfaceAttrib(mEglDisplay, surface, EGL_SWAP_BEHAVIOR,
498 preserve ? EGL_BUFFER_PRESERVED : EGL_BUFFER_DESTROYED);
499 if (!preserved) {
500 ALOGW("Failed to set EGL_SWAP_BEHAVIOR on surface %p, error=%s", (void*)surface,
501 eglErrorString());
502 // Maybe it's already set?
503 EGLint swapBehavior;
504 if (eglQuerySurface(mEglDisplay, surface, EGL_SWAP_BEHAVIOR, &swapBehavior)) {
505 preserved = (swapBehavior == EGL_BUFFER_PRESERVED);
506 } else {
507 ALOGW("Failed to query EGL_SWAP_BEHAVIOR on surface %p, error=%p", (void*)surface,
508 eglErrorString());
509 }
510 }
511
512 return preserved;
513 }
514
waitForeverOnFence(int fence,const char * logname)515 static status_t waitForeverOnFence(int fence, const char* logname) {
516 ATRACE_CALL();
517 if (fence == -1) {
518 return NO_ERROR;
519 }
520 constexpr int warningTimeout = 3000;
521 int err = sync_wait(fence, warningTimeout);
522 if (err < 0 && errno == ETIME) {
523 ALOGE("%s: fence %d didn't signal in %d ms", logname, fence, warningTimeout);
524 err = sync_wait(fence, -1);
525 }
526 return err < 0 ? -errno : status_t(NO_ERROR);
527 }
528
fenceWait(int fence)529 status_t EglManager::fenceWait(int fence) {
530 if (!hasEglContext()) {
531 ALOGE("EglManager::fenceWait: EGLDisplay not initialized");
532 return INVALID_OPERATION;
533 }
534
535 if (EglExtensions.waitSync && EglExtensions.nativeFenceSync) {
536 // Block GPU on the fence.
537 // Create an EGLSyncKHR from the current fence.
538 int fenceFd = ::dup(fence);
539 if (fenceFd == -1) {
540 ALOGE("EglManager::fenceWait: error dup'ing fence fd: %d", errno);
541 return -errno;
542 }
543 EGLint attribs[] = {EGL_SYNC_NATIVE_FENCE_FD_ANDROID, fenceFd, EGL_NONE};
544 EGLSyncKHR sync = eglCreateSyncKHR(mEglDisplay, EGL_SYNC_NATIVE_FENCE_ANDROID, attribs);
545 if (sync == EGL_NO_SYNC_KHR) {
546 close(fenceFd);
547 ALOGE("EglManager::fenceWait: error creating EGL fence: %#x", eglGetError());
548 return UNKNOWN_ERROR;
549 }
550
551 // XXX: The spec draft is inconsistent as to whether this should
552 // return an EGLint or void. Ignore the return value for now, as
553 // it's not strictly needed.
554 eglWaitSyncKHR(mEglDisplay, sync, 0);
555 EGLint eglErr = eglGetError();
556 eglDestroySyncKHR(mEglDisplay, sync);
557 if (eglErr != EGL_SUCCESS) {
558 ALOGE("EglManager::fenceWait: error waiting for EGL fence: %#x", eglErr);
559 return UNKNOWN_ERROR;
560 }
561 } else {
562 // Block CPU on the fence.
563 status_t err = waitForeverOnFence(fence, "EglManager::fenceWait");
564 if (err != NO_ERROR) {
565 ALOGE("EglManager::fenceWait: error waiting for fence: %d", err);
566 return err;
567 }
568 }
569 return OK;
570 }
571
createReleaseFence(bool useFenceSync,EGLSyncKHR * eglFence,int * nativeFence)572 status_t EglManager::createReleaseFence(bool useFenceSync, EGLSyncKHR* eglFence, int* nativeFence) {
573 *nativeFence = -1;
574 if (!hasEglContext()) {
575 ALOGE("EglManager::createReleaseFence: EGLDisplay not initialized");
576 return INVALID_OPERATION;
577 }
578
579 if (EglExtensions.nativeFenceSync) {
580 EGLSyncKHR sync = eglCreateSyncKHR(mEglDisplay, EGL_SYNC_NATIVE_FENCE_ANDROID, nullptr);
581 if (sync == EGL_NO_SYNC_KHR) {
582 ALOGE("EglManager::createReleaseFence: error creating EGL fence: %#x", eglGetError());
583 return UNKNOWN_ERROR;
584 }
585 glFlush();
586 int fenceFd = eglDupNativeFenceFDANDROID(mEglDisplay, sync);
587 eglDestroySyncKHR(mEglDisplay, sync);
588 if (fenceFd == EGL_NO_NATIVE_FENCE_FD_ANDROID) {
589 ALOGE("EglManager::createReleaseFence: error dup'ing native fence "
590 "fd: %#x",
591 eglGetError());
592 return UNKNOWN_ERROR;
593 }
594 *nativeFence = fenceFd;
595 *eglFence = EGL_NO_SYNC_KHR;
596 } else if (useFenceSync && EglExtensions.fenceSync) {
597 if (*eglFence != EGL_NO_SYNC_KHR) {
598 // There is already a fence for the current slot. We need to
599 // wait on that before replacing it with another fence to
600 // ensure that all outstanding buffer accesses have completed
601 // before the producer accesses it.
602 EGLint result = eglClientWaitSyncKHR(mEglDisplay, *eglFence, 0, 1000000000);
603 if (result == EGL_FALSE) {
604 ALOGE("EglManager::createReleaseFence: error waiting for previous fence: %#x",
605 eglGetError());
606 return UNKNOWN_ERROR;
607 } else if (result == EGL_TIMEOUT_EXPIRED_KHR) {
608 ALOGE("EglManager::createReleaseFence: timeout waiting for previous fence");
609 return TIMED_OUT;
610 }
611 eglDestroySyncKHR(mEglDisplay, *eglFence);
612 }
613
614 // Create a fence for the outstanding accesses in the current
615 // OpenGL ES context.
616 *eglFence = eglCreateSyncKHR(mEglDisplay, EGL_SYNC_FENCE_KHR, nullptr);
617 if (*eglFence == EGL_NO_SYNC_KHR) {
618 ALOGE("EglManager::createReleaseFence: error creating fence: %#x", eglGetError());
619 return UNKNOWN_ERROR;
620 }
621 glFlush();
622 }
623 return OK;
624 }
625
626 } /* namespace renderthread */
627 } /* namespace uirenderer */
628 } /* namespace android */
629