From ced67af6b2519c577f7830ea76e0426ff44a9a2a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A1ty=C3=A1s=20Mustoha?= <matyas.mustoha@h-lab.eu>
Date: Fri, 6 Mar 2020 11:42:21 +0100
Subject: Add support for WebGL2 GetFragDataLocation

Adds support for the `GetFragDataLocation` WebGL2 call.

See: https://www.khronos.org/registry/webgl/specs/latest/2.0/#3.7.7
---
 components/script/dom/webglprogram.rs | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'components/script/dom/webglprogram.rs')

diff --git a/components/script/dom/webglprogram.rs b/components/script/dom/webglprogram.rs
index 556573aae2e..4bb59fb1428 100644
--- a/components/script/dom/webglprogram.rs
+++ b/components/script/dom/webglprogram.rs
@@ -365,6 +365,30 @@ impl WebGLProgram {
         Ok(location)
     }
 
+    /// glGetFragDataLocation
+    pub fn get_frag_data_location(&self, name: DOMString) -> WebGLResult<i32> {
+        if !self.is_linked() || self.is_deleted() {
+            return Err(WebGLError::InvalidOperation);
+        }
+
+        if !validate_glsl_name(&name)? {
+            return Ok(-1);
+        }
+        if name.starts_with("gl_") {
+            return Ok(-1);
+        }
+
+        let (sender, receiver) = webgl_channel().unwrap();
+        self.upcast::<WebGLObject>()
+            .context()
+            .send_command(WebGLCommand::GetFragDataLocation(
+                self.id,
+                name.into(),
+                sender,
+            ));
+        Ok(receiver.recv().unwrap())
+    }
+
     /// glGetUniformLocation
     pub fn get_uniform_location(
         &self,
-- 
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