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      1 /*
      2  * Copyright (C) 2018 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 #if defined(__ANDROID__)
     18 
     19 #include <cutils/properties.h>
     20 #include "Loader.h"
     21 #include "egl_angle_platform.h"
     22 
     23 #pragma GCC diagnostic push
     24 #pragma GCC diagnostic ignored "-Wunused-parameter"
     25 #include <EGL/Platform.h>
     26 #pragma GCC diagnostic pop
     27 
     28 #include <android/dlext.h>
     29 #include <dlfcn.h>
     30 #include <graphicsenv/GraphicsEnv.h>
     31 #include <time.h>
     32 #include <log/log.h>
     33 
     34 namespace angle {
     35 
     36 static GetDisplayPlatformFunc angleGetDisplayPlatform = nullptr;
     37 static ResetDisplayPlatformFunc angleResetDisplayPlatform = nullptr;
     38 
     39 static time_t startTime = time(nullptr);
     40 
     41 static const unsigned char* getTraceCategoryEnabledFlag(PlatformMethods* /*platform*/,
     42                                                         const char* /*categoryName*/) {
     43     // Returning ptr to 'g' (non-zero) to ALWAYS enable tracing initially.
     44     // This ptr is what will be passed into "category_group_enabled" of addTraceEvent
     45     static const unsigned char traceEnabled = 'g';
     46     return &traceEnabled;
     47 }
     48 
     49 static double monotonicallyIncreasingTime(PlatformMethods* /*platform*/) {
     50     return difftime(time(nullptr), startTime);
     51 }
     52 
     53 static void logError(PlatformMethods* /*platform*/, const char* errorMessage) {
     54     ALOGE("ANGLE Error:%s", errorMessage);
     55 }
     56 
     57 static void logWarning(PlatformMethods* /*platform*/, const char* warningMessage) {
     58     ALOGW("ANGLE Warn:%s", warningMessage);
     59 }
     60 
     61 static void logInfo(PlatformMethods* /*platform*/, const char* infoMessage) {
     62     ALOGD("ANGLE Info:%s", infoMessage);
     63 }
     64 
     65 static TraceEventHandle addTraceEvent(
     66         PlatformMethods* /**platform*/, char phase, const unsigned char* /*category_group_enabled*/,
     67         const char* name, unsigned long long /*id*/, double /*timestamp*/, int /*num_args*/,
     68         const char** /*arg_names*/, const unsigned char* /*arg_types*/,
     69         const unsigned long long* /*arg_values*/, unsigned char /*flags*/) {
     70     switch (phase) {
     71         case 'B': {
     72             ATRACE_BEGIN(name);
     73             break;
     74         }
     75         case 'E': {
     76             ATRACE_END();
     77             break;
     78         }
     79         case 'I': {
     80             ATRACE_NAME(name);
     81             break;
     82         }
     83         default:
     84             // Could handle other event types here
     85             break;
     86     }
     87     // Return any non-zero handle to avoid assert in ANGLE
     88     TraceEventHandle result = 1.0;
     89     return result;
     90 }
     91 
     92 static void assignAnglePlatformMethods(PlatformMethods* platformMethods) {
     93     platformMethods->addTraceEvent = addTraceEvent;
     94     platformMethods->getTraceCategoryEnabledFlag = getTraceCategoryEnabledFlag;
     95     platformMethods->monotonicallyIncreasingTime = monotonicallyIncreasingTime;
     96     platformMethods->logError = logError;
     97     platformMethods->logWarning = logWarning;
     98     platformMethods->logInfo = logInfo;
     99 }
    100 
    101 // Initialize function ptrs for ANGLE PlatformMethods struct, used for systrace
    102 bool initializeAnglePlatform(EGLDisplay dpy) {
    103     // Since we're inside libEGL, use dlsym to lookup fptr for ANGLEGetDisplayPlatform
    104     android_namespace_t* ns = android::GraphicsEnv::getInstance().getAngleNamespace();
    105     const android_dlextinfo dlextinfo = {
    106             .flags = ANDROID_DLEXT_USE_NAMESPACE,
    107             .library_namespace = ns,
    108     };
    109     void* so = android_dlopen_ext("libGLESv2_angle.so", RTLD_LOCAL | RTLD_NOW, &dlextinfo);
    110     angleGetDisplayPlatform =
    111             reinterpret_cast<GetDisplayPlatformFunc>(dlsym(so, "ANGLEGetDisplayPlatform"));
    112 
    113     if (!angleGetDisplayPlatform) {
    114         ALOGE("dlsym lookup of ANGLEGetDisplayPlatform in libEGL_angle failed!");
    115         return false;
    116     }
    117 
    118     angleResetDisplayPlatform =
    119             reinterpret_cast<ResetDisplayPlatformFunc>(
    120                     eglGetProcAddress("ANGLEResetDisplayPlatform"));
    121 
    122     PlatformMethods* platformMethods = nullptr;
    123     if (!((angleGetDisplayPlatform)(dpy, g_PlatformMethodNames,
    124                                                               g_NumPlatformMethods, nullptr,
    125                                                               &platformMethods))) {
    126         ALOGE("ANGLEGetDisplayPlatform call failed!");
    127         return false;
    128     }
    129     if (platformMethods) {
    130         assignAnglePlatformMethods(platformMethods);
    131     } else {
    132         ALOGE("In initializeAnglePlatform() platformMethods struct ptr is NULL. Not assigning "
    133               "tracing function ptrs!");
    134     }
    135     return true;
    136 }
    137 
    138 void resetAnglePlatform(EGLDisplay dpy) {
    139     if (angleResetDisplayPlatform) {
    140         angleResetDisplayPlatform(dpy);
    141     }
    142 }
    143 
    144 }; // namespace angle
    145 
    146 #endif // __ANDROID__
    147