GetAvailableTargetFormats()

ktx_transcode_fmt_e Spices::Transcoder::GetAvailableTargetFormats ( )

staticprivate

Get available gpu compress format.

Returns

Returns available gpu compress format.

Definition at line 239 of file Transcoder.cpp.

    {
        SPICES_PROFILE_ZONE;
 
        VkPhysicalDeviceFeatures feature = VulkanDevice::GetDeviceFeatures();
 
        // Block compression
        if (feature.textureCompressionBC)
        {
            // BC7 is the preferred block compression if available
            if (FormatSupported(VK_FORMAT_BC7_SRGB_BLOCK))
            {
                return KTX_TTF_BC7_RGBA;
            }
 
            if (FormatSupported(VK_FORMAT_BC3_SRGB_BLOCK))
            {
                return KTX_TTF_BC3_RGBA;
            }
        }
 
        // Adaptive scalable texture compression
        if (feature.textureCompressionASTC_LDR)
        {
            if (FormatSupported(VK_FORMAT_ASTC_4x4_SRGB_BLOCK))
            {
                return KTX_TTF_ASTC_4x4_RGBA;
            }
        }
 
        // Ericsson texture compression
        if (feature.textureCompressionETC2)
        {
            if (FormatSupported(VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK))
            {
                return KTX_TTF_ETC2_RGBA;
            }
        }
 
        // PowerVR texture compression support needs to be checked via an extension
        /*if (get_device().is_extension_supported(VK_IMG_FORMAT_PVRTC_EXTENSION_NAME))
        {
            if (FormatSupported(VK_FORMAT_PVRTC1_4BPP_SRGB_BLOCK_IMG))
            {
                return KTX_TTF_PVRTC1_4_RGBA;
            }
        }*/
 
        // Always add uncompressed RGBA as a valid target
        return KTX_TTF_RGBA32;
    }