Add RGBAF16 support

webrender/src/device/gl.rs

@@ -4113,6 +4113,12 @@ impl Device {
                 read: gl::RG,
                 pixel_type: gl::UNSIGNED_SHORT,
             },
+            ImageFormat::RGBAF16 => FormatDesc {
+                internal: gl::RGBA16F,
+                external: gl::RGBA,
+                read: gl::RGBA,
+                pixel_type: gl::HALF_FLOAT,
+            },
         }
     }
 
@@ -4754,6 +4760,7 @@ impl<'a> TextureUploader<'a> {
             ImageFormat::RG16 => (gl::RG, 4, gl::UNSIGNED_SHORT),
             ImageFormat::RGBAF32 => (gl::RGBA, 16, gl::FLOAT),
             ImageFormat::RGBAI32 => (gl::RGBA_INTEGER, 16, gl::INT),
+            ImageFormat::RGBAF16 => (gl::RGBA, 8, gl::HALF_FLOAT),
         };
 
         let row_length = match chunk.stride {

webrender_api/src/image.rs

@@ -171,6 +171,9 @@ pub enum ImageFormat {
     RGBAI32 = 7,
     /// Four channels, byte storage.
     RGBA8 = 8,
+
+    /// Four channels, float16 storage.
+    RGBAF16 = 9,
 }
 
 impl ImageFormat {
@@ -185,6 +188,7 @@ impl ImageFormat {
             ImageFormat::RG16 => 4,
             ImageFormat::RGBAI32 => 16,
             ImageFormat::RGBA8 => 4,
+            ImageFormat::RGBAF16 => 8,
         }
     }
 }

wrench/src/yaml_frame_reader.rs

@@ -304,6 +304,7 @@ fn is_image_opaque(format: ImageFormat, bytes: &[u8]) -> bool {
         ImageFormat::RG16 => true,
         ImageFormat::R8 => false,
         ImageFormat::R16 => false,
+        ImageFormat::RGBAF16 |
         ImageFormat::RGBAF32 |
         ImageFormat::RGBAI32 => unreachable!(),
     }