LibWeb/WebGL: Implement EXT_blend_minmax extension

Author: https://github.com/Lubrsi
Commit: 948349974c
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4270

Libraries/LibWeb/WebGL/WebGLRenderingContext.cpp

@@ -15,6 +15,7 @@
 #include <LibWeb/Painting/Paintable.h>
 #include <LibWeb/WebGL/EventNames.h>
 #include <LibWeb/WebGL/Extensions/ANGLEInstancedArrays.h>
+#include <LibWeb/WebGL/Extensions/EXTBlendMinMax.h>
 #include <LibWeb/WebGL/Extensions/OESVertexArrayObject.h>
 #include <LibWeb/WebGL/Extensions/WebGLCompressedTextureS3tc.h>
 #include <LibWeb/WebGL/Extensions/WebGLDrawBuffers.h>
@@ -93,6 +94,7 @@ void WebGLRenderingContext::visit_edges(Cell::Visitor& visitor)
     WebGLRenderingContextImpl::visit_edges(visitor);
     visitor.visit(m_canvas_element);
     visitor.visit(m_angle_instanced_arrays_extension);
+    visitor.visit(m_ext_blend_min_max_extension);
     visitor.visit(m_oes_vertex_array_object_extension);
     visitor.visit(m_webgl_compressed_texture_s3tc_extension);
     visitor.visit(m_webgl_draw_buffers_extension);
@@ -202,6 +204,15 @@ JS::Object* WebGLRenderingContext::get_extension(String const& name)
         return m_angle_instanced_arrays_extension;
     }
 
+    if (Infra::is_ascii_case_insensitive_match(name, "EXT_blend_minmax"sv)) {
+        if (!m_ext_blend_min_max_extension) {
+            m_ext_blend_min_max_extension = MUST(Extensions::EXTBlendMinMax::create(realm(), *this));
+        }
+
+        VERIFY(m_ext_blend_min_max_extension);
+        return m_ext_blend_min_max_extension;
+    }
+
     if (Infra::is_ascii_case_insensitive_match(name, "OES_vertex_array_object"sv)) {
         if (!m_oes_vertex_array_object_extension) {
             m_oes_vertex_array_object_extension = MUST(Extensions::OESVertexArrayObject::create(realm(), *this));