Add feature gated 16-bit normalized texture support

wgpu-core/src/validation.rs

@@ -684,6 +684,9 @@ impl NumericType {
             Tf::Rg8Sint | Tf::Rg16Sint | Tf::Rg32Sint => {
                 (NumericDimension::Vector(Vs::Bi), Sk::Sint)
             }
+            Tf::R16Snorm | Tf::R16Unorm => (NumericDimension::Scalar, Sk::Float),
+            Tf::Rg16Snorm | Tf::Rg16Unorm => (NumericDimension::Vector(Vs::Bi), Sk::Float),
+            Tf::Rgba16Snorm | Tf::Rgba16Unorm => (NumericDimension::Vector(Vs::Quad), Sk::Float),
             Tf::Rgba8Unorm
             | Tf::Rgba8UnormSrgb
             | Tf::Rgba8Snorm

wgpu-hal/src/dx12/adapter.rs

@@ -185,7 +185,8 @@ impl super::Adapter {
             | wgt::Features::VERTEX_WRITABLE_STORAGE
             | wgt::Features::TIMESTAMP_QUERY
             | wgt::Features::TEXTURE_COMPRESSION_BC
-            | wgt::Features::CLEAR_COMMANDS;
+            | wgt::Features::CLEAR_COMMANDS
+            | wgt::Features::TEXTURE_FORMAT_16BIT_NORM;
         //TODO: in order to expose this, we need to run a compute shader
         // that extract the necessary statistics out of the D3D12 result.
         // Alternatively, we could allocate a buffer for the query set,

wgpu-hal/src/dx12/conv.rs

@@ -15,11 +15,15 @@ pub(super) fn map_texture_format(format: wgt::TextureFormat) -> dxgiformat::DXGI
         Tf::R8Sint => DXGI_FORMAT_R8_SINT,
         Tf::R16Uint => DXGI_FORMAT_R16_UINT,
         Tf::R16Sint => DXGI_FORMAT_R16_SINT,
+        Tf::R16Unorm => DXGI_FORMAT_R16_UNORM,
+        Tf::R16Snorm => DXGI_FORMAT_R16_SNORM,
         Tf::R16Float => DXGI_FORMAT_R16_FLOAT,
         Tf::Rg8Unorm => DXGI_FORMAT_R8G8_UNORM,
         Tf::Rg8Snorm => DXGI_FORMAT_R8G8_SNORM,
         Tf::Rg8Uint => DXGI_FORMAT_R8G8_UINT,
         Tf::Rg8Sint => DXGI_FORMAT_R8G8_SINT,
+        Tf::Rg16Unorm => DXGI_FORMAT_R16G16_UNORM,
+        Tf::Rg16Snorm => DXGI_FORMAT_R16G16_SNORM,
         Tf::R32Uint => DXGI_FORMAT_R32_UINT,
         Tf::R32Sint => DXGI_FORMAT_R32_SINT,
         Tf::R32Float => DXGI_FORMAT_R32_FLOAT,
@@ -40,6 +44,8 @@ pub(super) fn map_texture_format(format: wgt::TextureFormat) -> dxgiformat::DXGI
         Tf::Rg32Float => DXGI_FORMAT_R32G32_FLOAT,
         Tf::Rgba16Uint => DXGI_FORMAT_R16G16B16A16_UINT,
         Tf::Rgba16Sint => DXGI_FORMAT_R16G16B16A16_SINT,
+        Tf::Rgba16Unorm => DXGI_FORMAT_R16G16B16A16_UNORM,
+        Tf::Rgba16Snorm => DXGI_FORMAT_R16G16B16A16_SNORM,
         Tf::Rgba16Float => DXGI_FORMAT_R16G16B16A16_FLOAT,
         Tf::Rgba32Uint => DXGI_FORMAT_R32G32B32A32_UINT,
         Tf::Rgba32Sint => DXGI_FORMAT_R32G32B32A32_SINT,

wgpu-hal/src/gles/adapter.rs

@@ -575,6 +575,8 @@ impl crate::Adapter<super::Api> for super::Adapter {
             Tf::Rg8Uint | Tf::Rg8Sint | Tf::R32Uint | Tf::R32Sint => {
                 unfiltered_color | Tfc::STORAGE
             }
+            Tf::R16Unorm | Tf::Rg16Unorm | Tf::Rgba16Unorm => filtered_color,
+            Tf::R16Snorm | Tf::Rg16Snorm | Tf::Rgba16Snorm => filtered_color,
             Tf::R32Float => unfiltered_color,
             Tf::Rg16Uint | Tf::Rg16Sint => unfiltered_color,
             Tf::Rg16Float | Tf::Rgba8Unorm | Tf::Rgba8UnormSrgb => filtered_color | Tfc::STORAGE,

wgpu-hal/src/gles/conv.rs

@@ -12,6 +12,8 @@ impl super::AdapterShared {
             Tf::R8Sint => (glow::R8I, glow::RED_INTEGER, glow::BYTE),
             Tf::R16Uint => (glow::R16UI, glow::RED_INTEGER, glow::UNSIGNED_SHORT),
             Tf::R16Sint => (glow::R16I, glow::RED_INTEGER, glow::SHORT),
+            Tf::R16Unorm => (glow::R16, glow::RED, glow::SHORT),
+            Tf::R16Snorm => (glow::R16_SNORM, glow::RED, glow::SHORT),
             Tf::R16Float => (glow::R16F, glow::RED, glow::HALF_FLOAT),
             Tf::Rg8Unorm => (glow::RG8, glow::RG, glow::UNSIGNED_BYTE),
             Tf::Rg8Snorm => (glow::RG8, glow::RG, glow::BYTE),
@@ -22,6 +24,8 @@ impl super::AdapterShared {
             Tf::R32Float => (glow::R32F, glow::RED, glow::FLOAT),
             Tf::Rg16Uint => (glow::RG16UI, glow::RG_INTEGER, glow::UNSIGNED_SHORT),
             Tf::Rg16Sint => (glow::RG16I, glow::RG_INTEGER, glow::SHORT),
+            Tf::Rg16Unorm => (glow::RG16, glow::RG, glow::SHORT),
+            Tf::Rg16Snorm => (glow::RG16_SNORM, glow::RG, glow::SHORT),
             Tf::Rg16Float => (glow::RG16F, glow::RG, glow::HALF_FLOAT),
             Tf::Rgba8Unorm => (glow::RGBA8, glow::RGBA, glow::UNSIGNED_BYTE),
             Tf::Rgba8UnormSrgb => (glow::SRGB8_ALPHA8, glow::RGBA, glow::UNSIGNED_BYTE),
@@ -45,6 +49,8 @@ impl super::AdapterShared {
             Tf::Rg32Float => (glow::RG32F, glow::RG, glow::FLOAT),
             Tf::Rgba16Uint => (glow::RGBA16UI, glow::RGBA_INTEGER, glow::UNSIGNED_SHORT),
             Tf::Rgba16Sint => (glow::RGBA16I, glow::RGBA_INTEGER, glow::SHORT),
+            Tf::Rgba16Unorm => (glow::RGBA16, glow::RGBA, glow::SHORT),
+            Tf::Rgba16Snorm => (glow::RGBA16_SNORM, glow::RGBA, glow::SHORT),
             Tf::Rgba16Float => (glow::RGBA16F, glow::RGBA, glow::HALF_FLOAT),
             Tf::Rgba32Uint => (glow::RGBA32UI, glow::RGBA_INTEGER, glow::UNSIGNED_INT),
             Tf::Rgba32Sint => (glow::RGBA32I, glow::RGBA_INTEGER, glow::INT),

wgpu-hal/src/metal/adapter.rs

@@ -79,6 +79,12 @@ impl crate::Adapter<super::Api> for super::Adapter {
                     | Tfc::COLOR_ATTACHMENT
                     | Tfc::COLOR_ATTACHMENT_BLEND
             }
+            Tf::R16Unorm | Tf::R16Snorm => {
+                Tfc::SAMPLED_LINEAR
+                    | Tfc::STORAGE
+                    | Tfc::COLOR_ATTACHMENT
+                    | Tfc::COLOR_ATTACHMENT_BLEND
+            }
             Tf::Rg8Unorm | Tf::Rg8Snorm => {
                 Tfc::SAMPLED_LINEAR
                     | Tfc::STORAGE
@@ -105,6 +111,12 @@ impl crate::Adapter<super::Api> for super::Adapter {
             Tf::Rg16Uint | Tf::Rg16Sint => {
                 read_write_tier2_if | Tfc::STORAGE | Tfc::COLOR_ATTACHMENT
             }
+            Tf::Rg16Unorm | Tf::Rg16Snorm => {
+                Tfc::SAMPLED_LINEAR
+                    | Tfc::STORAGE
+                    | Tfc::COLOR_ATTACHMENT
+                    | Tfc::COLOR_ATTACHMENT_BLEND
+            }
             Tf::Rg16Float => {
                 read_write_tier2_if
                     | Tfc::SAMPLED_LINEAR
@@ -159,6 +171,12 @@ impl crate::Adapter<super::Api> for super::Adapter {
             Tf::Rgba16Uint | Tf::Rgba16Sint => {
                 read_write_tier2_if | Tfc::STORAGE | Tfc::COLOR_ATTACHMENT
             }
+            Tf::Rgba16Unorm | Tf::Rgba16Snorm => {
+                Tfc::SAMPLED_LINEAR
+                    | Tfc::STORAGE
+                    | Tfc::COLOR_ATTACHMENT
+                    | Tfc::COLOR_ATTACHMENT_BLEND
+            }
             Tf::Rgba16Float => {
                 read_write_tier2_if
                     | Tfc::SAMPLED_LINEAR
@@ -901,7 +919,8 @@ impl super::PrivateCapabilities {
             | F::VERTEX_WRITABLE_STORAGE
             | F::TEXTURE_ADAPTER_SPECIFIC_FORMAT_FEATURES
             | F::POLYGON_MODE_LINE
-            | F::CLEAR_COMMANDS;
+            | F::CLEAR_COMMANDS
+            | F::TEXTURE_FORMAT_16BIT_NORM;
 
         features.set(F::DEPTH_CLIP_CONTROL, self.supports_depth_clip_control);
 
@@ -1000,11 +1019,15 @@ impl super::PrivateCapabilities {
             Tf::R8Sint => R8Sint,
             Tf::R16Uint => R16Uint,
             Tf::R16Sint => R16Sint,
+            Tf::R16Unorm => R16Unorm,
+            Tf::R16Snorm => R16Snorm,
             Tf::R16Float => R16Float,
             Tf::Rg8Unorm => RG8Unorm,
             Tf::Rg8Snorm => RG8Snorm,
             Tf::Rg8Uint => RG8Uint,
             Tf::Rg8Sint => RG8Sint,
+            Tf::Rg16Unorm => RG16Unorm,
+            Tf::Rg16Snorm => RG16Snorm,
             Tf::R32Uint => R32Uint,
             Tf::R32Sint => R32Sint,
             Tf::R32Float => R32Float,
@@ -1025,6 +1048,8 @@ impl super::PrivateCapabilities {
             Tf::Rg32Float => RG32Float,
             Tf::Rgba16Uint => RGBA16Uint,
             Tf::Rgba16Sint => RGBA16Sint,
+            Tf::Rgba16Unorm => RGBA16Unorm,
+            Tf::Rgba16Snorm => RGBA16Snorm,
             Tf::Rgba16Float => RGBA16Float,
             Tf::Rgba32Uint => RGBA32Uint,
             Tf::Rgba32Sint => RGBA32Sint,

wgpu-hal/src/vulkan/adapter.rs

@@ -514,6 +514,11 @@ impl PhysicalDeviceFeatures {
             features.set(F::MULTIVIEW, multiview.multiview != 0);
         }
 
+        features.set(
+            F::TEXTURE_FORMAT_16BIT_NORM,
+            is_format_16bit_norm_supported(caps),
+        );
+
         (features, dl_flags)
     }
 
@@ -534,6 +539,7 @@ pub struct PhysicalDeviceCapabilities {
     properties: vk::PhysicalDeviceProperties,
     vulkan_1_2: Option<vk::PhysicalDeviceVulkan12Properties>,
     descriptor_indexing: Option<vk::PhysicalDeviceDescriptorIndexingPropertiesEXT>,
+    formats: Vec<vk::FormatProperties>,
 }
 
 // This is safe because the structs have `p_next: *mut c_void`, which we null out/never read.
@@ -547,6 +553,22 @@ impl PhysicalDeviceCapabilities {
             .any(|ep| unsafe { CStr::from_ptr(ep.extension_name.as_ptr()) } == extension)
     }
 
+    fn supports_format(
+        &self,
+        format: vk::Format,
+        tiling: vk::ImageTiling,
+        features: vk::FormatFeatureFlags,
+    ) -> bool {
+        self.formats
+            .get(format.as_raw() as usize)
+            .map(|properties| match tiling {
+                vk::ImageTiling::LINEAR => properties.linear_tiling_features.contains(features),
+                vk::ImageTiling::OPTIMAL => properties.optimal_tiling_features.contains(features),
+                _ => false,
+            })
+            .unwrap()
+    }
+
     /// Map `requested_features` to the list of Vulkan extension strings required to create the logical device.
     fn get_required_extensions(&self, requested_features: wgt::Features) -> Vec<&'static CStr> {
         let mut extensions = Vec::new();
@@ -766,6 +788,7 @@ impl super::InstanceShared {
             } else {
                 unsafe { self.raw.get_physical_device_properties(phd) }
             };
+            capabilities.formats = query_format_properties(&self.raw, phd);
 
             capabilities
         };
@@ -1307,9 +1330,10 @@ impl crate::Adapter<super::Api> for super::Adapter {
         use crate::TextureFormatCapabilities as Tfc;
         let vk_format = self.private_caps.map_texture_format(format);
         let properties = self
-            .instance
-            .raw
-            .get_physical_device_format_properties(self.raw, vk_format);
+            .phd_capabilities
+            .formats
+            .get(vk_format.as_raw() as usize)
+            .unwrap();
         let features = properties.optimal_tiling_features;
 
         let mut flags = Tfc::empty();
@@ -1489,3 +1513,41 @@ impl crate::Adapter<super::Api> for super::Adapter {
         })
     }
 }
+
+/// Querys properties of all known image formats. The raw value of `vk::Format` corresponds
+/// to the index of the returned Vec.
+fn query_format_properties(
+    instance: &ash::Instance,
+    physical_device: vk::PhysicalDevice,
+) -> Vec<vk::FormatProperties> {
+    // vk::Format::UNDEFINED
+    const FORMAT_MIN: i32 = 0;
+
+    // vk::Format::ASTC_12X12_SRGB_BLOCK
+    const FORMAT_MAX: i32 = 184;
+
+    debug_assert_eq!(FORMAT_MAX, vk::Format::ASTC_12X12_SRGB_BLOCK.as_raw());
+
+    (FORMAT_MIN..(FORMAT_MAX + 1))
+        .map(|raw| {
+            let image_format = vk::Format::from_raw(raw);
+            unsafe { instance.get_physical_device_format_properties(physical_device, image_format) }
+        })
+        .collect::<Vec<_>>()
+}
+
+fn is_format_16bit_norm_supported(caps: &PhysicalDeviceCapabilities) -> bool {
+    let tiling = vk::ImageTiling::OPTIMAL;
+    let features = vk::FormatFeatureFlags::SAMPLED_IMAGE
+        | vk::FormatFeatureFlags::STORAGE_IMAGE
+        | vk::FormatFeatureFlags::TRANSFER_SRC
+        | vk::FormatFeatureFlags::TRANSFER_DST;
+    let r16unorm = caps.supports_format(vk::Format::R16_UNORM, tiling, features);
+    let r16snorm = caps.supports_format(vk::Format::R16_SNORM, tiling, features);
+    let rg16unorm = caps.supports_format(vk::Format::R16G16_UNORM, tiling, features);
+    let rg16snorm = caps.supports_format(vk::Format::R16G16_SNORM, tiling, features);
+    let rgba16unorm = caps.supports_format(vk::Format::R16G16B16A16_UNORM, tiling, features);
+    let rgba16snorm = caps.supports_format(vk::Format::R16G16B16A16_SNORM, tiling, features);
+
+    r16unorm && r16snorm && rg16unorm && rg16snorm && rgba16unorm && rgba16snorm
+}

wgpu-hal/src/vulkan/conv.rs

@@ -12,11 +12,15 @@ impl super::PrivateCapabilities {
             Tf::R8Sint => F::R8_SINT,
             Tf::R16Uint => F::R16_UINT,
             Tf::R16Sint => F::R16_SINT,
+            Tf::R16Unorm => F::R16_UNORM,
+            Tf::R16Snorm => F::R16_SNORM,
             Tf::R16Float => F::R16_SFLOAT,
             Tf::Rg8Unorm => F::R8G8_UNORM,
             Tf::Rg8Snorm => F::R8G8_SNORM,
             Tf::Rg8Uint => F::R8G8_UINT,
             Tf::Rg8Sint => F::R8G8_SINT,
+            Tf::Rg16Unorm => F::R16G16_UNORM,
+            Tf::Rg16Snorm => F::R16G16_SNORM,
             Tf::R32Uint => F::R32_UINT,
             Tf::R32Sint => F::R32_SINT,
             Tf::R32Float => F::R32_SFLOAT,
@@ -37,6 +41,8 @@ impl super::PrivateCapabilities {
             Tf::Rg32Float => F::R32G32_SFLOAT,
             Tf::Rgba16Uint => F::R16G16B16A16_UINT,
             Tf::Rgba16Sint => F::R16G16B16A16_SINT,
+            Tf::Rgba16Unorm => F::R16G16B16A16_UNORM,
+            Tf::Rgba16Snorm => F::R16G16B16A16_SNORM,
             Tf::Rgba16Float => F::R16G16B16A16_SFLOAT,
             Tf::Rgba32Uint => F::R32G32B32A32_UINT,
             Tf::Rgba32Sint => F::R32G32B32A32_SINT,

wgpu-types/src/lib.rs

@@ -542,6 +542,15 @@ bitflags::bitflags! {
         ///
         /// This is a native only feature.
         const MULTIVIEW = 1 << 40;
+        /// Enables normalized `16-bit` texture formats.
+        ///
+        /// Supported platforms:
+        /// - Vulkan
+        /// - DX12
+        /// - Metal
+        ///
+        /// This is a native only feature.
+        const TEXTURE_FORMAT_16BIT_NORM = 1 << 41;
     }
 }
 
@@ -1473,6 +1482,16 @@ pub enum TextureFormat {
     /// Red channel only. 16 bit integer per channel. Signed in shader.
     #[cfg_attr(feature = "serde", serde(rename = "r16sint"))]
     R16Sint,
+    /// Red channel only. 16 bit integer per channel. [0, 65535] converted to/from float [0, 1] in shader.
+    ///
+    /// [`Features::TEXTURE_FORMAT_16BIT_NORM`] must be enabled to use this texture format.
+    #[cfg_attr(feature = "serde", serde(rename = "r16unorm"))]
+    R16Unorm,
+    /// Red channel only. 16 bit integer per channel. [0, 65535] converted to/from float [-1, 1] in shader.
+    ///
+    /// [`Features::TEXTURE_FORMAT_16BIT_NORM`] must be enabled to use this texture format.
+    #[cfg_attr(feature = "serde", serde(rename = "r16snorm"))]
+    R16Snorm,
     /// Red channel only. 16 bit float per channel. Float in shader.
     #[cfg_attr(feature = "serde", serde(rename = "r16float"))]
     R16Float,
@@ -1505,6 +1524,16 @@ pub enum TextureFormat {
     /// Red and green channels. 16 bit integer per channel. Signed in shader.
     #[cfg_attr(feature = "serde", serde(rename = "rg16sint"))]
     Rg16Sint,
+    /// Red and green channels. 16 bit integer per channel. [0, 65535] converted to/from float [0, 1] in shader.
+    ///
+    /// [`Features::TEXTURE_FORMAT_16BIT_NORM`] must be enabled to use this texture format.
+    #[cfg_attr(feature = "serde", serde(rename = "rg16unorm"))]
+    Rg16Unorm,
+    /// Red and green channels. 16 bit integer per channel. [0, 65535] converted to/from float [-1, 1] in shader.
+    ///
+    /// [`Features::TEXTURE_FORMAT_16BIT_NORM`] must be enabled to use this texture format.
+    #[cfg_attr(feature = "serde", serde(rename = "rg16snorm"))]
+    Rg16Snorm,
     /// Red and green channels. 16 bit float per channel. Float in shader.
     #[cfg_attr(feature = "serde", serde(rename = "rg16float"))]
     Rg16Float,
@@ -1554,6 +1583,16 @@ pub enum TextureFormat {
     /// Red, green, blue, and alpha channels. 16 bit integer per channel. Signed in shader.
     #[cfg_attr(feature = "serde", serde(rename = "rgba16sint"))]
     Rgba16Sint,
+    /// Red, green, blue, and alpha channels. 16 bit integer per channel. [0, 65535] converted to/from float [0, 1] in shader.
+    ///
+    /// [`Features::TEXTURE_FORMAT_16BIT_NORM`] must be enabled to use this texture format.
+    #[cfg_attr(feature = "serde", serde(rename = "rgba16unorm"))]
+    Rgba16Unorm,
+    /// Red, green, blue, and alpha. 16 bit integer per channel. [0, 65535] converted to/from float [-1, 1] in shader.
+    ///
+    /// [`Features::TEXTURE_FORMAT_16BIT_NORM`] must be enabled to use this texture format.
+    #[cfg_attr(feature = "serde", serde(rename = "rgba16snorm"))]
+    Rgba16Snorm,
     /// Red, green, blue, and alpha channels. 16 bit float per channel. Float in shader.
     #[cfg_attr(feature = "serde", serde(rename = "rgba16float"))]
     Rgba16Float,
@@ -1934,6 +1973,7 @@ impl TextureFormat {
         let bc = Features::TEXTURE_COMPRESSION_BC;
         let etc2 = Features::TEXTURE_COMPRESSION_ETC2;
         let astc_ldr = Features::TEXTURE_COMPRESSION_ASTC_LDR;
+        let norm16bit = Features::TEXTURE_FORMAT_16BIT_NORM;
 
         // Sample Types
         let uint = TextureSampleType::Uint;
@@ -2075,6 +2115,14 @@ impl TextureFormat {
             Self::Astc12x10RgbaUnormSrgb => (astc_ldr, float, srgb, (12, 10), 16, basic, 4),
             Self::Astc12x12RgbaUnorm => (astc_ldr, float, linear, (12, 12), 16, basic, 4),
             Self::Astc12x12RgbaUnormSrgb => (astc_ldr, float, srgb, (12, 12), 16, basic, 4),
+
+            // Optional normalized 16-bit-per-channel formats
+            Self::R16Unorm => (norm16bit, float, linear, (1, 1), 2, storage, 1),
+            Self::R16Snorm => (norm16bit, float, linear, (1, 1), 2, storage, 1),
+            Self::Rg16Unorm => (norm16bit, float, linear, (1, 1), 4, storage, 2),
+            Self::Rg16Snorm => (norm16bit, float, linear, (1, 1), 4, storage, 2),
+            Self::Rgba16Unorm => (norm16bit, float, linear, (1, 1), 8, storage, 4),
+            Self::Rgba16Snorm => (norm16bit, float, linear, (1, 1), 8, storage, 4),
         };
 
         TextureFormatInfo {