Auto merge of #20631 - brainlessdeveloper:add-webgl-get-renderbuffer-parameter, r=emilio

Implement WebGL GetRenderbufferParameter

This needed a bump of gleam to version 0.4.33 for this https://github.com/servo/gleam/pull/162

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I think my changes in test expectations are pretty naive and I have to wait for the PR to run on CI to see what the actual impact is. I'd like some guidance on this, too.

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- [x] `./mach build -d` does not report any errors
- [x] `./mach build-geckolib` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #20514 (github issue number if applicable).

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- [x] There are tests for these changes OR
- [ ] These changes do not require tests because _____

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components/canvas/webgl_thread.rs

@@ -754,6 +754,8 @@ impl WebGLImpl {
                 Self::active_uniform(ctx.gl(), program_id, index, chan),
             WebGLCommand::GetAttribLocation(program_id, name, chan) =>
                 Self::attrib_location(ctx.gl(), program_id, name, chan),
+            WebGLCommand::GetRenderbufferParameter(target, pname, chan) =>
+                Self::get_renderbuffer_parameter(ctx.gl(), target, pname, chan),
             WebGLCommand::GetFramebufferAttachmentParameter(target, attachment, pname, chan) =>
                 Self::get_framebuffer_attachment_parameter(ctx.gl(), target, attachment, pname, chan),
             WebGLCommand::GetVertexAttrib(index, pname, chan) =>
@@ -1188,6 +1190,17 @@ impl WebGLImpl {
         chan.send(parameter).unwrap();
     }
 
+    // https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.7
+    fn get_renderbuffer_parameter(
+        gl: &gl::Gl,
+        target: u32,
+        pname: u32,
+        chan: WebGLSender<i32>
+    ) {
+        let parameter = gl.get_renderbuffer_parameter_iv(target, pname);
+        chan.send(parameter).unwrap();
+    }
+
     fn uniform_location(gl: &gl::Gl,
                         program_id: WebGLProgramId,
                         name: String,