1 /* 2 * Copyright 2015 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 #ifndef ANDROID_HWVULKAN_H 18 #define ANDROID_HWVULKAN_H 19 20 #include <hardware/hardware.h> 21 #include <vulkan/vulkan.h> 22 23 __BEGIN_DECLS 24 25 #define HWVULKAN_HARDWARE_MODULE_ID "vulkan" 26 27 #define HWVULKAN_MODULE_API_VERSION_0_1 HARDWARE_MODULE_API_VERSION(0, 1) 28 #define HWVULKAN_DEVICE_API_VERSION_0_1 HARDWARE_DEVICE_API_VERSION_2(0, 1, 0) 29 30 #define HWVULKAN_DEVICE_0 "vk0" 31 32 typedef struct hwvulkan_module_t { 33 struct hw_module_t common; 34 } hwvulkan_module_t; 35 36 /* Dispatchable Vulkan object handles must be pointers, which must point to 37 * instances of hwvulkan_dispatch_t (potentially followed by additional 38 * implementation-defined data). On return from the creation function, the 39 * 'magic' field must contain HWVULKAN_DISPATCH_MAGIC; the loader will overwrite 40 * the 'vtbl' field. 41 * 42 * NOTE: The magic value and the layout of hwvulkan_dispatch_t match the LunarG 43 * loader used on platforms, to avoid pointless annoying differences for 44 * multi-platform drivers. Don't change them without a good reason. If there is 45 * an opportunity to change it, using a magic value that doesn't leave the 46 * upper 32-bits zero on 64-bit platforms would be nice. 47 */ 48 #define HWVULKAN_DISPATCH_MAGIC 0x01CDC0DE 49 typedef union { 50 uintptr_t magic; 51 const void* vtbl; 52 } hwvulkan_dispatch_t; 53 54 /* A hwvulkan_device_t corresponds to an ICD on other systems. Currently there 55 * can only be one on a system (HWVULKAN_DEVICE_0). It is opened once per 56 * process when the Vulkan API is first used; the hw_device_t::close() function 57 * is never called. Any non-trivial resource allocation should be done when 58 * the VkInstance is created rather than when the hwvulkan_device_t is opened. 59 */ 60 typedef struct hwvulkan_device_t { 61 struct hw_device_t common; 62 63 PFN_vkEnumerateInstanceExtensionProperties 64 EnumerateInstanceExtensionProperties; 65 PFN_vkCreateInstance CreateInstance; 66 PFN_vkGetInstanceProcAddr GetInstanceProcAddr; 67 } hwvulkan_device_t; 68 69 __END_DECLS 70 71 #endif // ANDROID_HWVULKAN_H 72