LibWeb/WebGL: Implement getContextAttributes()

Author: https://github.com/kalenikaliaksandr
Commit: https://github.com/LadybirdBrowser/ladybird/commit/c817eb8d2b7
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2776

Libraries/LibWeb/WebGL/Types.idl

@@ -10,8 +10,3 @@ typedef long long GLsizeiptr;
 typedef unrestricted float GLfloat;
 typedef unrestricted float GLclampf;
 
-enum WebGLPowerPreference {
-    "default",
-    "low-power",
-    "high-performance"
-};

Libraries/LibWeb/WebGL/WebGLContextAttributes.cpp

@@ -96,17 +96,17 @@ JS::ThrowCompletionOr<WebGLContextAttributes> convert_value_to_context_attribute
     else
         power_preference = TRY(value.as_object().get("powerPreference"));
 
-    WebGLPowerPreference power_preference_value { WebGLPowerPreference::Default };
+    Bindings::WebGLPowerPreference power_preference_value { Bindings::WebGLPowerPreference::Default };
 
     if (!power_preference.is_undefined()) {
         auto power_preference_string = TRY(power_preference.to_string(vm));
 
         if (power_preference_string == "high-performance"sv)
-            power_preference_value = WebGLPowerPreference::HighPerformance;
+            power_preference_value = Bindings::WebGLPowerPreference::HighPerformance;
         else if (power_preference_string == "low-power"sv)
-            power_preference_value = WebGLPowerPreference::LowPower;
+            power_preference_value = Bindings::WebGLPowerPreference::LowPower;
         else if (power_preference_string == "default"sv)
-            power_preference_value = WebGLPowerPreference::Default;
+            power_preference_value = Bindings::WebGLPowerPreference::Default;
         else
             return vm.throw_completion<JS::TypeError>(JS::ErrorType::InvalidEnumerationValue, power_preference_string, "WebGLPowerPreference");
     }

Libraries/LibWeb/WebGL/WebGLContextAttributes.h

@@ -7,15 +7,10 @@
 #pragma once
 
 #include <LibJS/Forward.h>
+#include <LibWeb/Bindings/WebGLRenderingContextPrototype.h>
 
 namespace Web::WebGL {
 
-enum class WebGLPowerPreference {
-    Default,
-    LowPower,
-    HighPerformance,
-};
-
 // https://www.khronos.org/registry/webgl/specs/latest/1.0/#WEBGLCONTEXTATTRIBUTES
 struct WebGLContextAttributes {
     bool alpha { true };
@@ -24,7 +19,7 @@ struct WebGLContextAttributes {
     bool antialias { true };
     bool premultiplied_alpha { true };
     bool preserve_drawing_buffer { false };
-    WebGLPowerPreference power_preference { WebGLPowerPreference::Default };
+    Bindings::WebGLPowerPreference power_preference { Bindings::WebGLPowerPreference::Default };
     bool fail_if_major_performance_caveat { false };
     bool desynchronized { false };
 };

Libraries/LibWeb/WebGL/WebGLRenderingContext.cpp

@@ -131,6 +131,13 @@ bool WebGLRenderingContext::is_context_lost() const
     return m_context_lost;
 }
 
+Optional<WebGLContextAttributes> WebGLRenderingContext::get_context_attributes()
+{
+    if (is_context_lost())
+        return {};
+    return m_actual_context_parameters;
+}
+
 void WebGLRenderingContext::set_size(Gfx::IntSize const& size)
 {
     context().set_size(size);

Libraries/LibWeb/WebGL/WebGLRenderingContext.h

@@ -32,6 +32,7 @@ public:
     GC::Ref<HTML::HTMLCanvasElement> canvas_for_binding() const;
 
     bool is_context_lost() const;
+    Optional<WebGLContextAttributes> get_context_attributes();
 
     RefPtr<Gfx::PaintingSurface> surface();
     void allocate_painting_surface_if_needed();

Libraries/LibWeb/WebGL/WebGLRenderingContext.idl

@@ -8,3 +8,9 @@ interface WebGLRenderingContext {
 
 WebGLRenderingContext includes WebGLRenderingContextBase;
 WebGLRenderingContext includes WebGLRenderingContextOverloads;
+
+enum WebGLPowerPreference {
+    "default",
+    "low-power",
+    "high-performance"
+};

Libraries/LibWeb/WebGL/WebGLRenderingContextBase.idl

@@ -38,7 +38,7 @@ interface mixin WebGLRenderingContextBase {
     [FIXME] attribute PredefinedColorSpace drawingBufferColorSpace;
     [FIXME] attribute PredefinedColorSpace unpackColorSpace;
 
-    [FIXME] WebGLContextAttributes? getContextAttributes();
+    WebGLContextAttributes? getContextAttributes();
     [FIXME] boolean isContextLost();
 
     sequence<DOMString>? getSupportedExtensions();

Meta/Lagom/Tools/CodeGenerators/LibWeb/GenerateWebGLRenderingContext.cpp

@@ -345,7 +345,7 @@ public:
             continue;
         }
 
-        if (function.name == "getSupportedExtensions"sv || function.name == "getExtension"sv) {
+        if (function.name == "getSupportedExtensions"sv || function.name == "getExtension"sv || function.name == "getContextAttributes"sv) {
             // Implemented in WebGLRenderingContext
             continue;
         }