webgl: Do validation of glScissor/glViewport(width, height) on the DO…

…M side.

Avoids testcase CRASHes due to unexpected GL errors.

components/script/dom/webglrenderingcontext.rs

@@ -1481,6 +1481,10 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
 
     // https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.4
     fn Scissor(&self, x: i32, y: i32, width: i32, height: i32) {
+        if width < 0 || height < 0 {
+            return self.webgl_error(InvalidValue)
+        }
+
         self.ipc_renderer
             .send(CanvasMsg::WebGL(WebGLCommand::Scissor(x, y, width, height)))
             .unwrap()
@@ -1893,6 +1897,10 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
 
     // https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.4
     fn Viewport(&self, x: i32, y: i32, width: i32, height: i32) {
+        if width < 0 || height < 0 {
+            return self.webgl_error(InvalidValue)
+        }
+
         self.ipc_renderer
             .send(CanvasMsg::WebGL(WebGLCommand::Viewport(x, y, width, height)))
             .unwrap()

tests/wpt/metadata/webgl/conformance-1.0.3/conformance/misc/invalid-passed-params.html.ini

@@ -1,3 +1,124 @@
 [invalid-passed-params.html]
   type: testharness
-  expected: CRASH
+  [WebGL test #4: getError expected: INVALID_VALUE. Was NO_ERROR : after evaluating: context.clear(desktopGL['ACCUM_BUFFER_BIT'\])]
+    expected: FAIL
+
+  [WebGL test #5: getError expected: INVALID_VALUE. Was NO_ERROR : after evaluating: context.clear(desktopGL['ACCUM_BUFFER_BIT'\] | context.COLOR_BUFFER_BIT)]
+    expected: FAIL
+
+  [WebGL test #6: getError expected: INVALID_VALUE. Was NO_ERROR : after evaluating: context.clear(desktopGL['ACCUM_BUFFER_BIT'\] | context.COLOR_BUFFER_BIT | context.DEPTH_BUFFER_BIT | context.STENCIL_BUFFER_BIT)]
+    expected: FAIL
+
+  [WebGL test #9: context.bufferData(context.ARRAY_BUFFER, 16, context.STREAM_DRAW) threw exception TypeError: Value is not an object.]
+    expected: FAIL
+
+  [WebGL test #10: context.bufferData(context.ARRAY_BUFFER, 16, context.STATIC_DRAW) threw exception TypeError: Value is not an object.]
+    expected: FAIL
+
+  [WebGL test #11: context.bufferData(context.ARRAY_BUFFER, 16, context.DYNAMIC_DRAW) threw exception TypeError: Value is not an object.]
+    expected: FAIL
+
+  [WebGL test #12: context.bufferData(context.ARRAY_BUFFER, 16, desktopGL['STREAM_READ'\]) threw exception TypeError: Value is not an object.]
+    expected: FAIL
+
+  [WebGL test #13: context.bufferData(context.ARRAY_BUFFER, 16, desktopGL['STREAM_COPY'\]) threw exception TypeError: Value is not an object.]
+    expected: FAIL
+
+  [WebGL test #14: context.bufferData(context.ARRAY_BUFFER, 16, desktopGL['STATIC_READ'\]) threw exception TypeError: Value is not an object.]
+    expected: FAIL
+
+  [WebGL test #15: context.bufferData(context.ARRAY_BUFFER, 16, desktopGL['STATIC_COPY'\]) threw exception TypeError: Value is not an object.]
+    expected: FAIL
+
+  [WebGL test #16: context.bufferData(context.ARRAY_BUFFER, 16, desktopGL['DYNAMIC_READ'\]) threw exception TypeError: Value is not an object.]
+    expected: FAIL
+
+  [WebGL test #17: context.bufferData(context.ARRAY_BUFFER, 16, desktopGL['DYNAMIC_COPY'\]) threw exception TypeError: Value is not an object.]
+    expected: FAIL
+
+  [WebGL test #19: context.texImage2D(context.TEXTURE_2D, 0, context.RGBA, -16, -16, 0, context.RGBA, context.UNSIGNED_BYTE, null) threw exception TypeError: Value is not an object.]
+    expected: FAIL
+
+  [WebGL test #20: context.texImage2D(context.TEXTURE_2D, 0, context.RGBA, 16, 16, 0, context.RGBA, context.UNSIGNED_BYTE, null) threw exception TypeError: Value is not an object.]
+    expected: FAIL
+
+  [WebGL test #23: getError expected: NO_ERROR. Was INVALID_VALUE : after evaluating: context.texSubImage2D(context.TEXTURE_2D, 0, 0, 0, 2, 2, context.RGBA, context.UNSIGNED_BYTE, pixels)]
+    expected: FAIL
+
+  [WebGL test #30: context.renderbufferStorage(context.RENDERBUFFER, context.RGBA4, -2, -2) threw exception TypeError: context.renderbufferStorage is not a function]
+    expected: FAIL
+
+  [WebGL test #31: context.renderbufferStorage(context.RENDERBUFFER, context.RGBA4, 16, 16) threw exception TypeError: context.renderbufferStorage is not a function]
+    expected: FAIL
+
+  [WebGL test #44: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #46: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #48: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #50: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #52: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #54: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #55: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #56: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #57: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #58: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #59: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #60: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #61: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #62: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #63: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #64: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #65: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #66: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #67: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #68: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #69: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #70: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #71: context.getError() should be 1281. Was 0.]
+    expected: FAIL
+
+  [WebGL test #72: context.getError() should be 1281. Was 0.]
+    expected: FAIL

tests/wpt/metadata/webgl/conformance-1.0.3/conformance/state/gl-geterror.html.ini

@@ -1,10 +1,4 @@
 [gl-geterror.html]
   type: testharness
-  expected:
-    if os == "mac": CRASH
-  [WebGL test #0: Unable to fetch WebGL rendering context for Canvas]
+  [WebGL test #2: successfullyParsed should be true (of type boolean). Was undefined (of type undefined).]
     expected: FAIL
-
-  [WebGL test #1: successfullyParsed should be true (of type boolean). Was undefined (of type undefined).]
-    expected: FAIL
-