Don't generate mip maps for RGB16F and RGB32F textures

src/core/texture.rs

@@ -349,12 +349,19 @@ fn set_parameters(
     }
 }
 
-fn calculate_number_of_mip_maps(
+fn calculate_number_of_mip_maps<T: TextureDataType>(
     mip_map_filter: Option<Interpolation>,
     width: u32,
     height: u32,
     depth: Option<u32>,
 ) -> u32 {
+    // Cannot generate mip maps for RGB16F or RGB32F textures on web (https://registry.khronos.org/webgl/extensions/EXT_color_buffer_float/)
+    if (T::data_type() == crate::context::FLOAT || T::data_type() == crate::context::HALF_FLOAT)
+        && T::size() == 3
+    {
+        return 1;
+    }
+
     if mip_map_filter.is_some() {
         let max_size = width.max(height).max(depth.unwrap_or(0));
         let power_of_two = max_size.next_power_of_two();

src/core/texture/texture2d.rs

@@ -16,6 +16,8 @@ impl Texture2D {
     ///
     /// Construcs a new texture with the given data.
     ///
+    /// **Note:** Mip maps will not be generated for RGB16F and RGB32F format, even if `mip_map_filter` is specified.
+    ///
     pub fn new(context: &Context, cpu_texture: &CpuTexture) -> Self {
         match cpu_texture.data {
             TextureData::RU8(ref data) => Self::new_with_data(context, cpu_texture, data),
@@ -57,6 +59,8 @@ impl Texture2D {
     /// The format is determined by the generic [TextureDataType] parameter
     /// (for example, if [u8; 4] is specified, the format is RGBA and the data type is byte).
     ///
+    /// **Note:** Mip maps will not be generated for RGB16F and RGB32F format, even if `mip_map_filter` is specified.
+    ///
     pub fn new_empty<T: TextureDataType>(
         context: &Context,
         width: u32,
@@ -68,7 +72,8 @@ impl Texture2D {
         wrap_t: Wrapping,
     ) -> Self {
         let id = generate(context);
-        let number_of_mip_maps = calculate_number_of_mip_maps(mip_map_filter, width, height, None);
+        let number_of_mip_maps =
+            calculate_number_of_mip_maps::<T>(mip_map_filter, width, height, None);
         let texture = Self {
             context: context.clone(),
             id,

src/core/texture/texture2d_array.rs

@@ -21,6 +21,8 @@ impl Texture2DArray {
     /// Creates a new texture array from the given [CpuTexture]s.
     /// All of the cpu textures must contain data with the same [TextureDataType] and the same width and height.
     ///
+    /// **Note:** Mip maps will not be generated for RGB16F and RGB32F format, even if `mip_map_filter` is specified.
+    ///
     pub fn new(context: &Context, cpu_textures: &[&CpuTexture]) -> Self {
         let cpu_texture = cpu_textures
             .get(0)
@@ -145,6 +147,8 @@ impl Texture2DArray {
     ///
     /// Creates a new array of 2D textures.
     ///
+    /// **Note:** Mip maps will not be generated for RGB16F and RGB32F format, even if `mip_map_filter` is specified.
+    ///
     pub fn new_empty<T: TextureDataType>(
         context: &Context,
         width: u32,
@@ -157,7 +161,8 @@ impl Texture2DArray {
         wrap_t: Wrapping,
     ) -> Self {
         let id = generate(context);
-        let number_of_mip_maps = calculate_number_of_mip_maps(mip_map_filter, width, height, None);
+        let number_of_mip_maps =
+            calculate_number_of_mip_maps::<T>(mip_map_filter, width, height, None);
         let texture = Self {
             context: context.clone(),
             id,

src/core/texture/texture3d.rs

@@ -16,6 +16,8 @@ impl Texture3D {
     ///
     /// Construcs a new 3D texture with the given data.
     ///
+    /// **Note:** Mip maps will not be generated for RGB16F and RGB32F format, even if `mip_map_filter` is specified.
+    ///
     pub fn new(context: &Context, cpu_texture: &CpuTexture3D) -> Self {
         match cpu_texture.data {
             TextureData::RU8(ref data) => Self::new_with_data(context, cpu_texture, data),
@@ -57,6 +59,8 @@ impl Texture3D {
     ///
     /// Creates a new empty 3D color texture.
     ///
+    /// **Note:** Mip maps will not be generated for RGB16F and RGB32F format, even if `mip_map_filter` is specified.
+    ///
     pub fn new_empty<T: TextureDataType>(
         context: &Context,
         width: u32,
@@ -71,7 +75,7 @@ impl Texture3D {
     ) -> Self {
         let id = generate(context);
         let number_of_mip_maps =
-            calculate_number_of_mip_maps(mip_map_filter, width, height, Some(depth));
+            calculate_number_of_mip_maps::<T>(mip_map_filter, width, height, Some(depth));
         let texture = Self {
             context: context.clone(),
             id,

src/core/texture/texture_cube_map.rs

@@ -118,6 +118,8 @@ impl TextureCubeMap {
     /// Creates a new cube map texture from the given [CpuTexture]s.
     /// All of the cpu textures must contain data with the same [TextureDataType].
     ///
+    /// **Note:** Mip maps will not be generated for RGB16F and RGB32F format, even if `mip_map_filter` is specified.
+    ///
     pub fn new(
         context: &Context,
         right: &CpuTexture,
@@ -299,6 +301,8 @@ impl TextureCubeMap {
     ///
     /// Creates a new texture cube map.
     ///
+    /// **Note:** Mip maps will not be generated for RGB16F and RGB32F format, even if `mip_map_filter` is specified.
+    ///
     pub fn new_empty<T: TextureDataType>(
         context: &Context,
         width: u32,
@@ -311,7 +315,8 @@ impl TextureCubeMap {
         wrap_r: Wrapping,
     ) -> Self {
         let id = generate(context);
-        let number_of_mip_maps = calculate_number_of_mip_maps(mip_map_filter, width, height, None);
+        let number_of_mip_maps =
+            calculate_number_of_mip_maps::<T>(mip_map_filter, width, height, None);
         let texture = Self {
             context: context.clone(),
             id,