Class 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
    Contact
    Last Modified Date
    2017-03-21
    IP Status
    No known IP claims.
    Interactions and External Dependencies
    Contributors
    • Dominik Witczak, AMD
    • Daniel Rakos, AMD
    • Graham Sellers, AMD
    • Matthaeus G. Chajdas, AMD
    • Qun Lin, AMD
    • Rex Xu, AMD
    • Timothy Lottes, AMD
    • 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