The Tor Browser: dom/plugins/base/android/ANPSurface.cpp@6474c204b198 (annotated)

dom/plugins/base/android/ANPSurface.cpp@6474c204b198 (annotated)

dom/plugins/base/android/ANPSurface.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include <dlfcn.h>
 #include <android/log.h>
 #include "ANPBase.h"
 #define LOG(args...)  __android_log_print(ANDROID_LOG_INFO, "GeckoPlugins" , ## args)
 #define ASSIGN(obj, name)   (obj)->name = anp_surface_##name
 #define CLEAR_EXCEPTION(env) if (env->ExceptionOccurred()) env->ExceptionClear();
 #define ANDROID_REGION_SIZE 512
 enum {
     PIXEL_FORMAT_RGBA_8888   = 1,
     PIXEL_FORMAT_RGB_565     = 4,
 };
 struct SurfaceInfo {
     uint32_t    w;
     uint32_t    h;
     uint32_t    s;
     uint32_t    usage;
     uint32_t    format;
     unsigned char* bits;
     uint32_t    reserved[2];
 };
 typedef struct ARect {
     int32_t left;
     int32_t top;
     int32_t right;
     int32_t bottom;
 } ARect;
 // used to cache JNI method and field IDs for Surface Objects
 static struct ANPSurfaceInterfaceJavaGlue {
     bool        initialized;
     jmethodID   getSurfaceHolder;
     jmethodID   getSurface;
     jfieldID    surfacePointer;
 } gSurfaceJavaGlue;
 static struct ANPSurfaceFunctions {
     bool initialized;
     int (* lock)(void*, SurfaceInfo*, void*);
     int (* unlockAndPost)(void*);
     void* (* regionConstructor)(void*);
     void (* setRegion)(void*, ARect const&);
 } gSurfaceFunctions;
 static inline void* getSurface(JNIEnv* env, jobject view) {
   if (!env || !view) {
     return nullptr;
   }
   if (!gSurfaceJavaGlue.initialized) {
     jclass surfaceViewClass = env->FindClass("android/view/SurfaceView");
     gSurfaceJavaGlue.getSurfaceHolder = env->GetMethodID(surfaceViewClass, "getHolder", "()Landroid/view/SurfaceHolder;");
     jclass surfaceHolderClass = env->FindClass("android/view/SurfaceHolder");
     gSurfaceJavaGlue.getSurface = env->GetMethodID(surfaceHolderClass, "getSurface", "()Landroid/view/Surface;");
     jclass surfaceClass = env->FindClass("android/view/Surface");
     gSurfaceJavaGlue.surfacePointer = env->GetFieldID(surfaceClass,
         "mSurfacePointer", "I");
     if (!gSurfaceJavaGlue.surfacePointer) {
       CLEAR_EXCEPTION(env);
       // It was something else in 2.2.
       gSurfaceJavaGlue.surfacePointer = env->GetFieldID(surfaceClass,
           "mSurface", "I");
       if (!gSurfaceJavaGlue.surfacePointer) {
         CLEAR_EXCEPTION(env);
         // And something else in 2.3+
         gSurfaceJavaGlue.surfacePointer = env->GetFieldID(surfaceClass,
             "mNativeSurface", "I");
         CLEAR_EXCEPTION(env);
       }
     }
     if (!gSurfaceJavaGlue.surfacePointer) {
       LOG("Failed to acquire surface pointer");
       return nullptr;
     }
     env->DeleteLocalRef(surfaceClass);
     env->DeleteLocalRef(surfaceViewClass);
     env->DeleteLocalRef(surfaceHolderClass);
     gSurfaceJavaGlue.initialized = (gSurfaceJavaGlue.surfacePointer != nullptr);
   }
   jobject holder = env->CallObjectMethod(view, gSurfaceJavaGlue.getSurfaceHolder);
   jobject surface = env->CallObjectMethod(holder, gSurfaceJavaGlue.getSurface);
   jint surfacePointer = env->GetIntField(surface, gSurfaceJavaGlue.surfacePointer);
   env->DeleteLocalRef(holder);
   env->DeleteLocalRef(surface);
   return (void*)surfacePointer;
 }
 static ANPBitmapFormat convertPixelFormat(int32_t format) {
   switch (format) {
     case PIXEL_FORMAT_RGBA_8888:  return kRGBA_8888_ANPBitmapFormat;
     case PIXEL_FORMAT_RGB_565:    return kRGB_565_ANPBitmapFormat;
     default:            return kUnknown_ANPBitmapFormat;
   }
 }
 static int bytesPerPixel(int32_t format) {
   switch (format) {
     case PIXEL_FORMAT_RGBA_8888: return 4;
     case PIXEL_FORMAT_RGB_565: return 2;
     default: return -1;
   }
 }
 static bool init() {
   if (gSurfaceFunctions.initialized)
     return true;
   void* handle = dlopen("libsurfaceflinger_client.so", RTLD_LAZY);
   if (!handle) {
     LOG("Failed to open libsurfaceflinger_client.so");
     return false;
   }
   gSurfaceFunctions.lock = (int (*)(void*, SurfaceInfo*, void*))dlsym(handle, "_ZN7android7Surface4lockEPNS0_11SurfaceInfoEPNS_6RegionEb");
   gSurfaceFunctions.unlockAndPost = (int (*)(void*))dlsym(handle, "_ZN7android7Surface13unlockAndPostEv");
   if (!gSurfaceFunctions.lock) {
     // Stuff changed in 3.0/4.0
     handle = dlopen("libgui.so", RTLD_LAZY);
     gSurfaceFunctions.lock = (int (*)(void*, SurfaceInfo*, void*))dlsym(handle, "_ZN7android7Surface4lockEPNS0_11SurfaceInfoEPNS_6RegionE");
     gSurfaceFunctions.unlockAndPost = (int (*)(void*))dlsym(handle, "_ZN7android7Surface13unlockAndPostEv");
   }
   handle = dlopen("libui.so", RTLD_LAZY);
   if (!handle) {
     LOG("Failed to open libui.so");
     return false;
   }
   gSurfaceFunctions.regionConstructor = (void* (*)(void*))dlsym(handle, "_ZN7android6RegionC1Ev");
   gSurfaceFunctions.setRegion = (void (*)(void*, ARect const&))dlsym(handle, "_ZN7android6Region3setERKNS_4RectE");
   gSurfaceFunctions.initialized = (gSurfaceFunctions.lock && gSurfaceFunctions.unlockAndPost &&
                                    gSurfaceFunctions.regionConstructor && gSurfaceFunctions.setRegion);
   LOG("Initialized? %d\n", gSurfaceFunctions.initialized);
   return gSurfaceFunctions.initialized;
 }
 // FIXME: All of this should be changed to use the equivalent things in AndroidBridge, bug 758612
 static bool anp_surface_lock(JNIEnv* env, jobject surfaceView, ANPBitmap* bitmap, ANPRectI* dirtyRect) {
   if (!bitmap || !surfaceView) {
     return false;
   }
   void* surface = getSurface(env, surfaceView);
   if (!bitmap || !surface) {
     return false;
   }
   if (!init()) {
     return false;
   }
   void* region = nullptr;
   if (dirtyRect) {
     region = malloc(ANDROID_REGION_SIZE);
     gSurfaceFunctions.regionConstructor(region);
     ARect rect;
     rect.left = dirtyRect->left;
     rect.top = dirtyRect->top;
     rect.right = dirtyRect->right;
     rect.bottom = dirtyRect->bottom;
     gSurfaceFunctions.setRegion(region, rect);
   }
   SurfaceInfo info;
   int err = gSurfaceFunctions.lock(surface, &info, region);
   if (err < 0) {
     LOG("Failed to lock surface");
     return false;
   }
   // the surface may have expanded the dirty region so we must to pass that
   // information back to the plugin.
   if (dirtyRect) {
     ARect* dirtyBounds = (ARect*)region; // The bounds are the first member, so this should work!
     dirtyRect->left = dirtyBounds->left;
     dirtyRect->right = dirtyBounds->right;
     dirtyRect->top = dirtyBounds->top;
     dirtyRect->bottom = dirtyBounds->bottom;
   }
   if (region)
     free(region);
   int bpr = info.s * bytesPerPixel(info.format);
   bitmap->format = convertPixelFormat(info.format);
   bitmap->width = info.w;
   bitmap->height = info.h;
   bitmap->rowBytes = bpr;
   if (info.w > 0 && info.h > 0) {
     bitmap->baseAddr = info.bits;
   } else {
     bitmap->baseAddr = nullptr;
     return false;
   }
   return true;
 }
 static void anp_surface_unlock(JNIEnv* env, jobject surfaceView) {
   if (!surfaceView) {
     return;
   }
   if (!init()) {
     return;
   }
   void* surface = getSurface(env, surfaceView);
   if (!surface) {
     return;
   }
   gSurfaceFunctions.unlockAndPost(surface);
 }
 ///////////////////////////////////////////////////////////////////////////////
 void InitSurfaceInterface(ANPSurfaceInterfaceV0* i) {
   ASSIGN(i, lock);
   ASSIGN(i, unlock);
   // setup the java glue struct
   gSurfaceJavaGlue.initialized = false;
   // setup the function struct
   gSurfaceFunctions.initialized = false;
 }

The Tor Browser / annotate

dom/plugins/base/android/ANPSurface.cpp@6474c204b198 (annotated)

dom/plugins/base/android/ANPSurface.cpp