vulkan-driver/src/buffer.rs

   1 // SPDX-License-Identifier: LGPL-2.1-or-later
   2 // Copyright 2018 Jacob Lifshay
   3 use api;
   4 use handle::SharedHandle;
   5
   6 #[derive(Debug)]
   7 pub struct BufferMemory {
   8     pub device_memory: SharedHandle<api::VkDeviceMemory>,
   9     pub offset: usize,
  10 }
  11
  12 #[derive(Debug)]
  13 pub struct Buffer {
  14     pub size: usize,
  15     pub memory: Option<BufferMemory>,
  16 }
  17
  18 #[derive(Debug)]
  19 pub struct BufferSlice {
  20     pub buffer: SharedHandle<api::VkBuffer>,
  21     pub offset: usize,
  22     pub size: usize,
  23 }
  24
  25 impl BufferSlice {
  26     pub unsafe fn from(v: &api::VkDescriptorBufferInfo) -> Self {
  27         let buffer = SharedHandle::from(v.buffer).unwrap();
  28         assert!(v.offset < buffer.size as u64);
  29         let offset = v.offset as usize;
  30         let size = if v.range == api::VK_WHOLE_SIZE as u64 {
  31             buffer.size - offset
  32         } else {
  33             assert!(v.range != 0);
  34             assert!(v.range.checked_add(v.offset).unwrap() <= buffer.size as u64);
  35             v.range as usize
  36         };
  37         Self {
  38             buffer,
  39             offset,
  40             size,
  41         }
  42     }
  43 }
  44
  45 #[derive(Debug)]
  46 pub struct BufferView {}