webgl: Define a command for vertexAttribPointer().

gleam already had this, and we want to be using it instead of
vertex_attrib_pointer_f32.

webrender_traits/src/types.rs

@@ -548,6 +548,7 @@ pub enum WebGLCommand {
     UniformMatrix4fv(i32, bool, Vec<f32>),
     UseProgram(WebGLProgramId),
     VertexAttrib(u32, f32, f32, f32, f32),
+    VertexAttribPointer(u32, i32, u32, bool, i32, u32),
     VertexAttribPointer2f(u32, i32, bool, i32, u32),
     Viewport(i32, i32, i32, i32),
     TexImage2D(u32, i32, i32, i32, i32, u32, u32, Vec<u8>),

webrender_traits/src/webgl.rs

@@ -106,6 +106,7 @@ impl fmt::Debug for WebGLCommand {
             UseProgram(..) => "UseProgram",
             VertexAttrib(..) => "VertexAttrib",
             VertexAttribPointer2f(..) => "VertexAttribPointer2f",
+            VertexAttribPointer(..) => "VertexAttribPointer",
             Viewport(..) => "Viewport",
             TexImage2D(..) => "TexImage2D",
             TexParameteri(..) => "TexParameteri",
@@ -310,6 +311,8 @@ impl WebGLCommand {
                 gl::vertex_attrib_4f(attrib_id, x, y, z, w),
             WebGLCommand::VertexAttribPointer2f(attrib_id, size, normalized, stride, offset) =>
                 gl::vertex_attrib_pointer_f32(attrib_id, size, normalized, stride, offset),
+            WebGLCommand::VertexAttribPointer(attrib_id, size, data_type, normalized, stride, offset) =>
+                gl::vertex_attrib_pointer(attrib_id, size, data_type, normalized, stride, offset),
             WebGLCommand::Viewport(x, y, width, height) =>
                 gl::viewport(x, y, width, height),
             WebGLCommand::TexImage2D(target, level, internal, width, height, format, data_type, data) =>