1 //
2 // Copyright 2020 The ANGLE Project Authors. All rights reserved.
3 // Use of this source code is governed by a BSD-style license that can be
4 // found in the LICENSE file.
5 //
6 // WindowSurfaceVkHeadless.cpp:
7 // Implements the class methods for WindowSurfaceVkHeadless.
8 //
9
10 #include "WindowSurfaceVkHeadless.h"
11 #include "libANGLE/renderer/vulkan/RendererVk.h"
12
13 namespace rx
14 {
15
WindowSurfaceVkHeadless(const egl::SurfaceState & surfaceState,EGLNativeWindowType window)16 WindowSurfaceVkHeadless::WindowSurfaceVkHeadless(const egl::SurfaceState &surfaceState,
17 EGLNativeWindowType window)
18 : WindowSurfaceVk(surfaceState, window)
19 {}
20
~WindowSurfaceVkHeadless()21 WindowSurfaceVkHeadless::~WindowSurfaceVkHeadless() {}
22
createSurfaceVk(vk::Context * context,gl::Extents * extentsOut)23 angle::Result WindowSurfaceVkHeadless::createSurfaceVk(vk::Context *context,
24 gl::Extents *extentsOut)
25 {
26 RendererVk *renderer = context->getRenderer();
27 ASSERT(renderer != nullptr);
28 VkInstance instance = renderer->getInstance();
29
30 VkHeadlessSurfaceCreateInfoEXT createInfo = {};
31 createInfo.sType = VK_STRUCTURE_TYPE_HEADLESS_SURFACE_CREATE_INFO_EXT;
32
33 ANGLE_VK_TRY(context, vkCreateHeadlessSurfaceEXT(instance, &createInfo, nullptr, &mSurface));
34
35 return getCurrentWindowSize(context, extentsOut);
36 }
37
getCurrentWindowSize(vk::Context * context,gl::Extents * extentsOut)38 angle::Result WindowSurfaceVkHeadless::getCurrentWindowSize(vk::Context *context,
39 gl::Extents *extentsOut)
40 {
41 const VkPhysicalDevice &physicalDevice = context->getRenderer()->getPhysicalDevice();
42 ANGLE_VK_TRY(context, vkGetPhysicalDeviceSurfaceCapabilitiesKHR(physicalDevice, mSurface,
43 &mSurfaceCaps));
44
45 // Spec: "For headless surfaces, currentExtent is the reserved value (0xFFFFFFFF, 0xFFFFFFFF).
46 // Whatever the application sets a swapchain's imageExtent to will be the size of the surface,
47 // after the first image is presented."
48 // For ANGLE, in headless mode, we share the same 'SimpleDisplayWindow' structure with front
49 // EGL window info to define the vulkan backend surface/image extents.
50 angle::vk::SimpleDisplayWindow *simpleWindow =
51 reinterpret_cast<angle::vk::SimpleDisplayWindow *>(mNativeWindowType);
52
53 // Update surface extent before output the new extent.
54 mSurfaceCaps.currentExtent.width = simpleWindow->width;
55 mSurfaceCaps.currentExtent.height = simpleWindow->height;
56
57 *extentsOut =
58 gl::Extents(mSurfaceCaps.currentExtent.width, mSurfaceCaps.currentExtent.height, 1);
59
60 return angle::Result::Continue;
61 }
62
63 } // namespace rx
64