vulkan-wsi-layer/wsi/headless/surface_properties.cpp

/*
 * Copyright (c) 2017-2019, 2021 Arm Limited.
 *
 * SPDX-License-Identifier: MIT
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <algorithm>
#include <array>
#include <cassert>
#include <cstdlib>
#include <cstring>
#include <map>
#include <mutex>

#include <vulkan/vk_icd.h>
#include <vulkan/vulkan.h>

#include <layer/private_data.hpp>

#include "surface_properties.hpp"
#include "surface.hpp"
#include "util/macros.hpp"

#define UNUSED(x) ((void)(x))

namespace wsi
{
namespace headless
{

surface_properties& surface_properties::get_instance()
{
   static surface_properties instance;
   return instance;
}

VkResult surface_properties::get_surface_capabilities(VkPhysicalDevice physical_device, VkSurfaceKHR surface,
                                                      VkSurfaceCapabilitiesKHR *surface_capabilities)
{
   UNUSED(surface);
   /* Image count limits */
   surface_capabilities->minImageCount = 1;
   surface_capabilities->maxImageCount = MAX_SWAPCHAIN_IMAGE_COUNT;

   /* Surface extents */
   surface_capabilities->currentExtent = { 0xffffffff, 0xffffffff };
   surface_capabilities->minImageExtent = { 1, 1 };
   /* Ask the device for max */
   VkPhysicalDeviceProperties dev_props;
   layer::instance_private_data::get(physical_device).disp.GetPhysicalDeviceProperties(physical_device, &dev_props);

   surface_capabilities->maxImageExtent = { dev_props.limits.maxImageDimension2D,
                                            dev_props.limits.maxImageDimension2D };
   surface_capabilities->maxImageArrayLayers = 1;

   /* Surface transforms */
   surface_capabilities->supportedTransforms = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
   surface_capabilities->currentTransform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;

   /* Composite alpha */
   surface_capabilities->supportedCompositeAlpha = static_cast<VkCompositeAlphaFlagBitsKHR>(
      VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR | VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR |
      VK_COMPOSITE_ALPHA_PRE_MULTIPLIED_BIT_KHR | VK_COMPOSITE_ALPHA_POST_MULTIPLIED_BIT_KHR);

   /* Image usage flags */
   surface_capabilities->supportedUsageFlags =
      VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT | VK_IMAGE_USAGE_SAMPLED_BIT |
      VK_IMAGE_USAGE_STORAGE_BIT | VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT;

   return VK_SUCCESS;
}

VkResult surface_properties::get_surface_formats(VkPhysicalDevice physical_device, VkSurfaceKHR surface,
                                                 uint32_t *surface_format_count, VkSurfaceFormatKHR *surface_formats)
{
   UNUSED(surface);

   VkResult res = VK_SUCCESS;
   /* Construct a list of all formats supported by the driver - for color attachment */
   constexpr int max_core_1_0_formats = VK_FORMAT_ASTC_12x12_SRGB_BLOCK + 1;
   VkFormat formats[max_core_1_0_formats];
   uint32_t format_count = 0;

   for (int id = 0; id < max_core_1_0_formats; id++)
   {
      VkImageFormatProperties image_format_props;

      res = layer::instance_private_data::get(physical_device)
               .disp.GetPhysicalDeviceImageFormatProperties(
                  physical_device, static_cast<VkFormat>(id), VK_IMAGE_TYPE_2D, VK_IMAGE_TILING_OPTIMAL,
                  VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT, VK_IMAGE_CREATE_MUTABLE_FORMAT_BIT, &image_format_props);

      if (res != VK_ERROR_FORMAT_NOT_SUPPORTED)
      {
         formats[format_count] = static_cast<VkFormat>(id);
         format_count++;
      }
   }
   assert(format_count > 0);
   assert(surface_format_count != nullptr);
   res = VK_SUCCESS;
   if (nullptr == surface_formats)
   {
      *surface_format_count = format_count;
   }
   else
   {
      if (format_count > *surface_format_count)
      {
         res = VK_INCOMPLETE;
      }

      *surface_format_count = std::min(*surface_format_count, format_count);
      for (uint32_t i = 0; i < *surface_format_count; ++i)
      {
         surface_formats[i].format = formats[i];
         surface_formats[i].colorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR;
      }
   }

   return res;
}

VkResult surface_properties::get_surface_present_modes(VkPhysicalDevice physical_device, VkSurfaceKHR surface,
                                                       uint32_t *present_mode_count, VkPresentModeKHR *present_modes)
{
   UNUSED(physical_device);
   UNUSED(surface);

   VkResult res = VK_SUCCESS;
   static const std::array<VkPresentModeKHR, 2> modes = { VK_PRESENT_MODE_FIFO_KHR, VK_PRESENT_MODE_FIFO_RELAXED_KHR };

   assert(present_mode_count != nullptr);

   if (nullptr == present_modes)
   {
      *present_mode_count = modes.size();
   }
   else
   {
      if (modes.size() > *present_mode_count)
      {
         res = VK_INCOMPLETE;
      }
      *present_mode_count = std::min(*present_mode_count, static_cast<uint32_t>(modes.size()));
      for (uint32_t i = 0; i < *present_mode_count; ++i)
      {
         present_modes[i] = modes[i];
      }
   }

   return res;
}

VWL_VKAPI_CALL(VkResult)
CreateHeadlessSurfaceEXT(VkInstance instance, const VkHeadlessSurfaceCreateInfoEXT *pCreateInfo,
                         const VkAllocationCallbacks *pAllocator, VkSurfaceKHR *pSurface) VWL_API_POST
{
   auto &instance_data = layer::instance_private_data::get(instance);
   util::allocator allocator{ instance_data.get_allocator(), VK_SYSTEM_ALLOCATION_SCOPE_OBJECT, pAllocator };
   auto wsi_surface = util::unique_ptr<wsi::surface>(allocator.make_unique<surface>());
   if (wsi_surface == nullptr)
   {
      return VK_ERROR_OUT_OF_HOST_MEMORY;
   }
   VkResult res = instance_data.disp.CreateHeadlessSurfaceEXT(instance, pCreateInfo, pAllocator, pSurface);
   if (res == VK_SUCCESS)
   {
      res = instance_data.add_surface(*pSurface, wsi_surface);
      if (res != VK_SUCCESS)
      {
         instance_data.disp.DestroySurfaceKHR(instance, *pSurface, pAllocator);
      }
   }
   return res;
}

PFN_vkVoidFunction surface_properties::get_proc_addr(const char *name)
{
   if (strcmp(name, "vkCreateHeadlessSurfaceEXT") == 0)
   {
      return reinterpret_cast<PFN_vkVoidFunction>(CreateHeadlessSurfaceEXT);
   }
   return nullptr;
}

} /* namespace headless */
} /* namespace wsi */