1. buffer_handle_t 文件位置:system\core\include\system\window.h typedef constnative_handle_t*buffer_handle_t; 2. native_handle_t 文件位置:system\core\include\cutils\native_handle.h typedef structnative_handle { intversion;/* sizeof(native_handle_t) */ intnumFds;/* number of file-descript...
1. buffer_handle_t 文件位置:system\core\include\system\window.h typedef constnative_handle_t*buffer_handle_t; 2. native_handle_t 文件位置:system\core\include\cutils\native_handle.h typedef structnative_handle { intversion;/* sizeof(native_handle_t) */ intnumFds;/* number of file-descript...
4. if (private_handle_t::validate(handle) < 0) 5. return -EINVAL; 6. 7. const* hnd = reinterpret_cast<private_handle_t const*>(handle); 8. if (hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER) { 9. // free this buffer 10. reinterpret_cast<private_module_t*>( 11. dev...
结构体buffer_handle_t定义在文件hardware/libhardware/include/hardware/gralloc.h文件中,如下所示: typedefconstnative_handle* buffer_handle_t; 它是一个类型为native_handle_t的指针,而结构体native_handle_t用来描述一个本地句柄值,它定义在系统运行时层的文件system/core/include/cutils/native_handle.h文件中,...
最后,这个函数还会将用来描述要释放的图形缓冲区的private_handle_t结构体所占用的内存释放掉,并且将要要释放的图形缓冲区所在的系统帧缓冲区或者匿名共享内存的文件描述符关闭掉。 函数terminateBuffer实现在文件hardware/libhardware/modules/gralloc/mapper.cpp中,如下所示: ...
这个函数同样是首先调用private_handle_t类的静态成员函数validate来验证参数handle指向的一块图形缓冲区的确是由Gralloc模块分配的,接着再将将参数handle指向的一块图形缓冲区转换为一个private_handle_t结构体hnd来访问。 一块图形缓冲区只有被注册过,即被Gralloc模块中的函数gralloc_register_buffer注册过,才需要注销,...
... } native_handle_t; typedef const native_handle_t* buffer_handle_t; native_handle_t也就是具体Buffer的句柄,根据native_handle_t就能找到护体的Buffer。这里是用文件描述符进行描述的。 GraphicBuffer,很多属性都是继承于父类的,GraphicBuffer自己的属性比较少 * frameworks/native/include/ui/GraphicBuffer.h...
Surface::unlockAndPost() { if (mLockedBuffer == 0) { ALOGE("Surface::unlockAndPost failed, no locked buffer"); return INVALID_OPERATION; } int fd = -1; status_t err = mLockedBuffer->unlockAsync(&fd); ALOGE_IF(err, "failed unlocking buffer (%p)", mLockedBuffer->handle); //1....
ptr_t>(addr) - reinterpret_cast<uintptr_t>(info.dli_fbase)); printf("%-3d %p %s (relative addr: %p)\n", idx, addr, symbol, relative_addr); } } // 主函数 int main() { const int max_frames = 128; void* buffer[max_frames]; // 捕获回溯信息 capture_backtrace(buffer, max_...
usage = static_cast<int>(inUsage); stride = static_cast<int>(outStride); } return err; } status_t GraphicBufferAllocator::allocate(uint32_t width, uint32_t height, PixelFormat format, uint32_t usage, buffer_handle_t* handle, uint32_t* stride, uint64_t graphicBufferId, std::string ...