Safe Haskell	Safe-Inferred
Language	Haskell2010

Vulkan.Extensions.VK_AMD_negative_viewport_height

Description

Name

VK_AMD_negative_viewport_height - device extension

VK_AMD_negative_viewport_height

Name String: VK_AMD_negative_viewport_height

Extension Type

Device extension

Registered Extension Number

36

Revision

1

Ratification Status

Not ratified

Extension and Version Dependencies; Deprecation State

Obsoleted by VK_KHR_maintenance1 extension
- Which in turn was promoted to Vulkan 1.1

Contact

Matthaeus G. Chajdas @anteru%0A*Here describe the issue or question you have about the VK_AMD_negative_viewport_height extension*

Other Extension Metadata

Last Modified Date: 2016-09-02

IP Status

No known IP claims.

Contributors

Matthaeus G. Chajdas, AMD
Graham Sellers, AMD
Baldur Karlsson

Description

This extension allows an application to specify a negative viewport height. The result is that the viewport transformation will flip along the y-axis.

Allow negative height to be specified in the Viewport::height field to perform y-inversion of the clip-space to framebuffer-space transform. This allows apps to avoid having to use gl_Position.y = -gl_Position.y in shaders also targeting other APIs.

Obsoletion by `VK_KHR_maintenance1` and Vulkan 1.1

Functionality in this extension is included in VK_KHR_maintenance1 and subsequently Vulkan 1.1. Due to some slight behavioral differences, this extension must not be enabled alongside VK_KHR_maintenance1, or in an instance created with version 1.1 or later requested in ApplicationInfo::apiVersion.