| Name |
| |
| ANGLE_vulkan_display |
| |
| Name Strings |
| |
| EGL_ANGLE_vulkan_display |
| |
| Contributors |
| |
| Xiaoxuan Liu, Arm Ltd. |
| Sunny Sun, Arm Ltd. |
| |
| Contacts |
| |
| Xiaoxuan Liu, Arm Ltd. (xiaoxuan 'dot' liu 'at' arm 'dot' com) |
| |
| Status |
| |
| Draft |
| |
| Version |
| |
| Version 1, 2020-10-29 |
| |
| Number |
| |
| EGL Extension XXX |
| |
| Extension Type |
| |
| EGL client extension |
| |
| Dependencies |
| |
| Requires EGL_EXT_platform_angle_vulkan. |
| |
| Overview |
| |
| This extension allows ANGLE to use simple display mode through |
| VK_KHR_display without native platform support (e.g. X11, GBM). |
| The EGLSurfaces to be created from native types only contain the |
| basic width and height info. |
| |
| New Types |
| |
| The basic structure to represent a display window, used by vulkan |
| backend to create valid display with VK_KHR_display. |
| |
| typedef struct displayWindow |
| { |
| khronos_uint16_t width; |
| khronos_uint16_t height; |
| } DisplayWindow; |
| |
| New Procedures and Functions |
| |
| None |
| |
| New Tokens |
| |
| Accepted as values for the EGL_PLATFORM_ANGLE_NATIVE_PLATFORM_TYPE_ANGLE |
| attribute: |
| |
| EGL_PLATFORM_VULKAN_DISPLAY_MODE_SIMPLE_ANGLE 0x34A4 |
| EGL_PLATFORM_VULKAN_DISPLAY_MODE_HEADLESS_ANGLE 0x34A5 |
| |
| Additions to the EGL Specification |
| |
| None |
| |
| New Behavior |
| |
| To obtain an simple EGLDisplay backed by a ANGLE vulkan with |
| VK_KHR_display, request a display that is backed by a Vulkan driver |
| through EGL_ANGLE_platform_angle_vulkan. And the value of attribute |
| EGL_PLATFORM_ANGLE_NATIVE_PLATFORM_TYPE_ANGLE should be |
| EGL_PLATFORM_VULKAN_DISPLAY_MODE_SIMPLE_ANGLE or |
| EGL_PLATFORM_VULKAN_DISPLAY_MODE_HEADLESS_ANGLE. |
| |
| If an EGLDisplay is backed by ANGLE vulkan VK_KHR_display and the |
| value of attribute EGL_PLATFORM_ANGLE_NATIVE_PLATFORM_TYPE_ANGLE is |
| set but neither EGL_PLATFORM_VULKAN_DISPLAY_MODE_SIMPLE_ANGLE or |
| EGL_PLATFORM_VULKAN_DISPLAY_MODE_HEADLESS_ANGLE, then EGL_NO_DISPLAY |
| should be returned. |
| |
| Issues |
| |
| None |
| |
| Revision History |
| |
| Version 1, 2020-10-29 (Xiaoxuan Liu) |
| - Initial draft |
| |
