org.lwjgl.vulkan

Class AMDTextureGatherBiasLod

java.lang.Object

org.lwjgl.vulkan.AMDTextureGatherBiasLod

public final class AMDTextureGatherBiasLod
extends java.lang.Object

This extension adds two related features.

Firstly, support for the following SPIR-V extension in Vulkan is added:

• SPV_AMD_texture_gather_bias_lod

Secondly, the extension allows the application to query which formats can be used together with the new function prototypes introduced by the SPIR-V extension.

Examples

 struct VkTextureLODGatherFormatPropertiesAMD
 {
     VkStructureType sType;
     const void*     pNext;
     VkBool32        supportsTextureGatherLODBiasAMD;
 };
 
 // ----------------------------------------------------------------------------------------
 // How to detect if an image format can be used with the new function prototypes.
 VkPhysicalDeviceImageFormatInfo2   formatInfo;
 VkImageFormatProperties2           formatProps;
 VkTextureLODGatherFormatPropertiesAMD textureLODGatherSupport;
 
 textureLODGatherSupport.sType = VK_STRUCTURE_TYPE_TEXTURE_LOD_GATHER_FORMAT_PROPERTIES_AMD;
 textureLODGatherSupport.pNext = nullptr;
 
 formatInfo.sType  = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGE_FORMAT_INFO_2;
 formatInfo.pNext  = nullptr;
 formatInfo.format = ...;
 formatInfo.type   = ...;
 formatInfo.tiling = ...;
 formatInfo.usage  = ...;
 formatInfo.flags  = ...;
 
 formatProps.sType = VK_STRUCTURE_TYPE_IMAGE_FORMAT_PROPERTIES_2;
 formatProps.pNext = &textureLODGatherSupport;
 
 vkGetPhysicalDeviceImageFormatProperties2(physical_device, &formatInfo, &formatProps);
 
 if (textureLODGatherSupport.supportsTextureGatherLODBiasAMD == VK_TRUE)
 {
     // physical device supports SPV_AMD_texture_gather_bias_lod for the specified
     // format configuration.
 }
 else
 {
     // physical device does not support SPV_AMD_texture_gather_bias_lod for the
     // specified format configuration.
 }

Name String

VK_AMD_texture_gather_bias_lod

Extension Type

Device extension

Registered Extension Number

42

Revision

1

Extension and Version Dependencies

• Requires Vulkan 1.0
• Requires VK_KHR_get_physical_device_properties2

Contact

• Rex Xu amdrexu

Last Modified Date

2017-03-21

IP Status

No known IP claims.

Interactions and External Dependencies

• Requires the SPV_AMD_texture_gather_bias_lod SPIR-V extension.

Contributors

• Dominik Witczak, AMD
• Daniel Rakos, AMD
• Graham Sellers, AMD
• Matthaeus G. Chajdas, AMD
• Qun Lin, AMD
• Rex Xu, AMD
• Timothy Lottes, AMD

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	VK_AMD_TEXTURE_GATHER_BIAS_LOD_EXTENSION_NAME The extension name.
static int	VK_AMD_TEXTURE_GATHER_BIAS_LOD_SPEC_VERSION The extension specification version.
static int	VK_STRUCTURE_TYPE_TEXTURE_LOD_GATHER_FORMAT_PROPERTIES_AMD Extends VkStructureType.

Method Summary

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

VK_AMD_TEXTURE_GATHER_BIAS_LOD_SPEC_VERSION

public static final int VK_AMD_TEXTURE_GATHER_BIAS_LOD_SPEC_VERSION

The extension specification version.

See Also:

Constant Field Values

VK_AMD_TEXTURE_GATHER_BIAS_LOD_EXTENSION_NAME

public static final java.lang.String VK_AMD_TEXTURE_GATHER_BIAS_LOD_EXTENSION_NAME

The extension name.

See Also:

Constant Field Values

VK_STRUCTURE_TYPE_TEXTURE_LOD_GATHER_FORMAT_PROPERTIES_AMD

public static final int VK_STRUCTURE_TYPE_TEXTURE_LOD_GATHER_FORMAT_PROPERTIES_AMD

Extends VkStructureType.

See Also:

Constant Field Values