As we discussed previously in this chapter, the Gralloc module can support two kinds of device: Gralloc devices and framebuffer devices. In the open method of the Gralloc device, it creates a device named GRALLOC_HARDWARE_GPU0 and supports two methods, alloc and free, as we can see in the following snippet. We have discussed both methods in detail earlier in this chapter:
... if (!strcmp(name, GRALLOC_HARDWARE_GPU0)) { gralloc_context_t *dev; dev = (gralloc_context_t*)malloc(sizeof(*dev)); /* initialize our state here */ memset(dev, 0, sizeof(*dev)); /* initialize the procs */ dev->device.common.tag = HARDWARE_DEVICE_TAG; dev->device.common.version = 0; dev->device.common.module = const_cast<hw_module_t*>(module); ...
