Auto merge of #13665 - anholt:webgl-uniform-matrix-v, r=emilio

webgl: Implement uniformMatrix*fv.

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- [ ] These changes fix #__ (github issue number if applicable).

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- [X] There are tests for these changes OR
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These new functions are derived from the existing uniform*fv
functions.  They get used in a lot of demo code, so it should greatly
improve our compatibility.

This regresses uniformMatrixBadArgs.html, which gets at an existing
problem in our uniform matrix support (failure to validate
that the uniform is a matrix before calling down) but previously just
failed because it only called the 'fv' variants and never the existing
'f' variants.

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components/script/dom/webglrenderingcontext.rs

@@ -2108,6 +2108,66 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
         Ok(())
     }
 
+    // https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
+    #[allow(unsafe_code)]
+    fn UniformMatrix2fv(&self,
+                        cx: *mut JSContext,
+                        uniform: Option<&WebGLUniformLocation>,
+                        transpose: bool,
+                        data: *mut JSObject) -> Fallible<()> {
+        assert!(!data.is_null());
+        let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<f32>(cx, data, ()) });
+        if self.validate_uniform_parameters(uniform,
+                                            UniformSetterType::FloatMat2,
+                                            &data_vec) {
+            self.ipc_renderer
+                .send(CanvasMsg::WebGL(WebGLCommand::UniformMatrix2fv(uniform.unwrap().id(), transpose, data_vec)))
+                .unwrap()
+        }
+
+        Ok(())
+    }
+
+    // https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
+    #[allow(unsafe_code)]
+    fn UniformMatrix3fv(&self,
+                        cx: *mut JSContext,
+                        uniform: Option<&WebGLUniformLocation>,
+                        transpose: bool,
+                        data: *mut JSObject) -> Fallible<()> {
+        assert!(!data.is_null());
+        let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<f32>(cx, data, ()) });
+        if self.validate_uniform_parameters(uniform,
+                                            UniformSetterType::FloatMat3,
+                                            &data_vec) {
+            self.ipc_renderer
+                .send(CanvasMsg::WebGL(WebGLCommand::UniformMatrix3fv(uniform.unwrap().id(), transpose, data_vec)))
+                .unwrap()
+        }
+
+        Ok(())
+    }
+
+    // https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
+    #[allow(unsafe_code)]
+    fn UniformMatrix4fv(&self,
+                        cx: *mut JSContext,
+                        uniform: Option<&WebGLUniformLocation>,
+                        transpose: bool,
+                        data: *mut JSObject) -> Fallible<()> {
+        assert!(!data.is_null());
+        let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<f32>(cx, data, ()) });
+        if self.validate_uniform_parameters(uniform,
+                                            UniformSetterType::FloatMat4,
+                                            &data_vec) {
+            self.ipc_renderer
+                .send(CanvasMsg::WebGL(WebGLCommand::UniformMatrix4fv(uniform.unwrap().id(), transpose, data_vec)))
+                .unwrap()
+        }
+
+        Ok(())
+    }
+
     // https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
     fn UseProgram(&self, program: Option<&WebGLProgram>) {
         if let Some(program) = program {
@@ -2480,6 +2540,9 @@ pub enum UniformSetterType {
     FloatVec2,
     FloatVec3,
     FloatVec4,
+    FloatMat2,
+    FloatMat3,
+    FloatMat4,
 }
 
 impl UniformSetterType {
@@ -2493,6 +2556,9 @@ impl UniformSetterType {
             UniformSetterType::FloatVec2 => 2,
             UniformSetterType::FloatVec3 => 3,
             UniformSetterType::FloatVec4 => 4,
+            UniformSetterType::FloatMat2 => 4,
+            UniformSetterType::FloatMat3 => 9,
+            UniformSetterType::FloatMat4 => 16,
         }
     }
 
@@ -2525,6 +2591,9 @@ impl UniformSetterType {
             UniformSetterType::FloatVec2 => constants::FLOAT_VEC2,
             UniformSetterType::FloatVec3 => constants::FLOAT_VEC3,
             UniformSetterType::FloatVec4 => constants::FLOAT_VEC4,
+            UniformSetterType::FloatMat2 => constants::FLOAT_MAT2,
+            UniformSetterType::FloatMat3 => constants::FLOAT_MAT3,
+            UniformSetterType::FloatMat4 => constants::FLOAT_MAT4,
         }
     }
 }

components/script/dom/webidls/WebGLRenderingContext.webidl

@@ -713,14 +713,23 @@ interface WebGLRenderingContextBase
     //                      Float32Array value);
     //void uniformMatrix2fv(WebGLUniformLocation? location, GLboolean transpose,
     //                      sequence<GLfloat> value);
+    [Throws]
+    void uniformMatrix2fv(WebGLUniformLocation? location, GLboolean transpose,
+                          object v);
     //void uniformMatrix3fv(WebGLUniformLocation? location, GLboolean transpose,
     //                      Float32Array value);
     //void uniformMatrix3fv(WebGLUniformLocation? location, GLboolean transpose,
     //                      sequence<GLfloat> value);
+    [Throws]
+    void uniformMatrix3fv(WebGLUniformLocation? location, GLboolean transpose,
+                          object v);
     //void uniformMatrix4fv(WebGLUniformLocation? location, GLboolean transpose,
     //                      Float32Array value);
     //void uniformMatrix4fv(WebGLUniformLocation? location, GLboolean transpose,
     //                      sequence<GLfloat> value);
+    [Throws]
+    void uniformMatrix4fv(WebGLUniformLocation? location, GLboolean transpose,
+                          object v);
 
     void useProgram(WebGLProgram? program);
     void validateProgram(WebGLProgram? program);