Implement missing checks in WebGLRenderingContext::GetBufferParameter

components/script/dom/webglrenderingcontext.rs

@@ -1237,21 +1237,41 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
 
     #[allow(unsafe_code)]
     // https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.5
-    unsafe fn GetBufferParameter(&self, _cx: *mut JSContext, target: u32, parameter: u32) -> JSVal {
-        let parameter_matches = match parameter {
-            constants::BUFFER_SIZE |
-            constants::BUFFER_USAGE => true,
-            _ => false,
+    unsafe fn GetBufferParameter(
+        &self,
+        _cx: *mut JSContext,
+        target: u32,
+        parameter: u32,
+    ) -> JSVal {
+        let buffer = match target {
+            constants::ARRAY_BUFFER => self.bound_buffer_array.get(),
+            constants::ELEMENT_ARRAY_BUFFER => self.bound_buffer_element_array.get(),
+            _ => {
+                self.webgl_error(InvalidEnum);
+                return NullValue();
+            }
+        };
+        match parameter {
+            constants::BUFFER_SIZE | constants::BUFFER_USAGE => {},
+            _ => {
+                self.webgl_error(InvalidEnum);
+                return NullValue();
+            }
+        }
+        let buffer = match buffer {
+            Some(buffer) => buffer,
+            None => {
+                self.webgl_error(InvalidOperation);
+                return NullValue();
+            }
         };
 
-        if !parameter_matches {
-            self.webgl_error(InvalidEnum);
-            return NullValue();
+        if parameter == constants::BUFFER_SIZE {
+            return Int32Value(buffer.capacity() as i32);
         }
 
         let (sender, receiver) = webgl_channel().unwrap();
         self.send_command(WebGLCommand::GetBufferParameter(target, parameter, sender));
-
         Int32Value(receiver.recv().unwrap())
     }
 

tests/wpt/mozilla/meta/webgl/conformance-1.0.3/conformance/misc/null-object-behaviour.html.ini

@@ -1,3 +1,7 @@
 [null-object-behaviour.html]
-  type: testharness
-  expected: CRASH
+  [WebGL test #3: getError expected: INVALID_VALUE. Was NO_ERROR : after evaluating: context.linkProgram(undefined)]
+    expected: FAIL
+
+  [WebGL test #38: getError expected: INVALID_OPERATION. Was INVALID_VALUE : after evaluating: context.bufferData(context.ARRAY_BUFFER, 1, context.STATIC_DRAW)]
+    expected: FAIL
+

tests/wpt/mozilla/meta/webgl/conformance-2.0.0/conformance2/state/gl-object-get-calls.html.ini

@@ -1,2 +1,110 @@
 [gl-object-get-calls.html]
-  expected: CRASH
+  expected: ERROR
+  [WebGL test #6: gl.getBufferParameter(gl.COPY_READ_BUFFER, gl.BUFFER_SIZE) should be 16 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #7: gl.getBufferParameter(gl.COPY_READ_BUFFER, gl.BUFFER_USAGE) should be 35048 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #9: gl.getBufferParameter(gl.COPY_WRITE_BUFFER, gl.BUFFER_SIZE) should be 16 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #10: gl.getBufferParameter(gl.COPY_WRITE_BUFFER, gl.BUFFER_USAGE) should be 35048 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #12: gl.getBufferParameter(gl.PIXEL_PACK_BUFFER, gl.BUFFER_SIZE) should be 16 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #13: gl.getBufferParameter(gl.PIXEL_PACK_BUFFER, gl.BUFFER_USAGE) should be 35048 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #15: gl.getBufferParameter(gl.PIXEL_UNPACK_BUFFER, gl.BUFFER_SIZE) should be 16 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #16: gl.getBufferParameter(gl.PIXEL_UNPACK_BUFFER, gl.BUFFER_USAGE) should be 35048 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #18: gl.getBufferParameter(gl.TRANSFORM_FEEDBACK_BUFFER, gl.BUFFER_SIZE) should be 16 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #19: gl.getBufferParameter(gl.TRANSFORM_FEEDBACK_BUFFER, gl.BUFFER_USAGE) should be 35048 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #21: gl.getBufferParameter(gl.UNIFORM_BUFFER, gl.BUFFER_SIZE) should be 16 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #22: gl.getBufferParameter(gl.UNIFORM_BUFFER, gl.BUFFER_USAGE) should be 35048 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #26: getError expected: NO_ERROR. Was INVALID_ENUM : ]
+    expected: FAIL
+
+  [WebGL test #28: getError expected: NO_ERROR. Was INVALID_ENUM : ]
+    expected: FAIL
+
+  [WebGL test #29: gl.checkFramebufferStatus(gl.FRAMEBUFFER) should be 36053. Was 36061.]
+    expected: FAIL
+
+  [WebGL test #35: gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME) should be [object WebGLRenderbuffer\]. Was null.]
+    expected: FAIL
+
+  [WebGL test #42: getError expected: INVALID_OPERATION. Was INVALID_ENUM : after evaluating: gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE)]
+    expected: FAIL
+
+  [WebGL test #48: gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.BACK, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE) should be 33304 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #49: gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.DEPTH, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE) should be 33304 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #50: gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.STENCIL, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE) should be 33304 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #63: getError expected: NO_ERROR. Was INVALID_OPERATION : ]
+    expected: FAIL
+
+  [WebGL test #64: getFramebufferAttachmentParameter did not generate INVALID_ENUM for invalid parameter enum: NO_ERROR]
+    expected: FAIL
+
+  [WebGL test #65: getFramebufferAttachmentParameter did not generate INVALID_ENUM for invalid target enum: NO_ERROR]
+    expected: FAIL
+
+  [WebGL test #66: getFramebufferAttachmentParameter did not generate INVALID_ENUM for invalid attachment enum: NO_ERROR]
+    expected: FAIL
+
+  [WebGL test #67: getError expected: NO_ERROR. Was INVALID_ENUM : ]
+    expected: FAIL
+
+  [WebGL test #69: getError expected: NO_ERROR. Was INVALID_ENUM : ]
+    expected: FAIL
+
+  [WebGL test #70: gl.checkFramebufferStatus(gl.FRAMEBUFFER) should be 36053. Was 36061.]
+    expected: FAIL
+
+  [WebGL test #76: gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME) should be [object WebGLRenderbuffer\]. Was null.]
+    expected: FAIL
+
+  [WebGL test #83: getError expected: INVALID_OPERATION. Was INVALID_ENUM : after evaluating: gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE)]
+    expected: FAIL
+
+  [WebGL test #89: gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.BACK, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE) should be 33304 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #90: gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.DEPTH, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE) should be 33304 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #91: gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.STENCIL, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE) should be 0 (of type number). Was null (of type object).]
+    expected: FAIL
+
+  [WebGL test #104: getFramebufferAttachmentParameter did not generate INVALID_ENUM for invalid parameter enum: NO_ERROR]
+    expected: FAIL
+
+  [WebGL test #105: getFramebufferAttachmentParameter did not generate INVALID_ENUM for invalid target enum: NO_ERROR]
+    expected: FAIL
+
+  [WebGL test #106: getFramebufferAttachmentParameter did not generate INVALID_ENUM for invalid attachment enum: NO_ERROR]
+    expected: FAIL
+
+  [WebGL test #108: successfullyParsed should be true (of type boolean). Was undefined (of type undefined).]
+    expected: FAIL
+