1 files changed, 17 insertions, 14 deletions
diff --git a/Source/WebCore/html/canvas/ANGLEInstancedArrays.cpp b/Source/WebCore/html/canvas/ANGLEInstancedArrays.cpp
index a0e573a5f..aed7da6a9 100644
--- a/Source/WebCore/html/canvas/ANGLEInstancedArrays.cpp
+++ b/Source/WebCore/html/canvas/ANGLEInstancedArrays.cpp
@@ -28,9 +28,13 @@
 #if ENABLE(WEBGL)
 #include "ANGLEInstancedArrays.h"
 
+#if PLATFORM(GTK)
+#include "Extensions3D.h"
+#endif
+
 namespace WebCore {
 
-ANGLEInstancedArrays::ANGLEInstancedArrays(WebGLRenderingContext* context)
+ANGLEInstancedArrays::ANGLEInstancedArrays(WebGLRenderingContextBase& context)
     : WebGLExtension(context)
 {
 }
@@ -44,39 +48,38 @@ WebGLExtension::ExtensionName ANGLEInstancedArrays::getName() const
     return ANGLEInstancedArraysName;
 }
 
-OwnPtr<ANGLEInstancedArrays> ANGLEInstancedArrays::create(WebGLRenderingContext* context)
-{
-    return adoptPtr(new ANGLEInstancedArrays(context));
-}
-
-bool ANGLEInstancedArrays::supported(WebGLRenderingContext*)
+bool ANGLEInstancedArrays::supported(WebGLRenderingContextBase& context)
 {
-#if PLATFORM(IOS) || PLATFORM(MAC) && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090
+#if PLATFORM(COCOA)
+    UNUSED_PARAM(context);
     return true;
+#elif PLATFORM(GTK)
+    return context.graphicsContext3D()->getExtensions().supports("GL_ANGLE_instanced_arrays");
 #else
+    UNUSED_PARAM(context);
     return false;
 #endif
 }
 
 void ANGLEInstancedArrays::drawArraysInstancedANGLE(GC3Denum mode, GC3Dint first, GC3Dsizei count, GC3Dsizei primcount)
 {
-    if (m_context->isContextLost())
+    if (m_context.isContextLost())
         return;
-    m_context->drawArraysInstanced(mode, first, count, primcount);
+    m_context.drawArraysInstanced(mode, first, count, primcount);
 }
 
 void ANGLEInstancedArrays::drawElementsInstancedANGLE(GC3Denum mode, GC3Dsizei count, GC3Denum type, long long offset, GC3Dsizei primcount)
 {
-    if (m_context->isContextLost())
+    if (m_context.isContextLost())
         return;
-    m_context->drawElementsInstanced(mode, count, type, offset, primcount);
+    m_context.drawElementsInstanced(mode, count, type, offset, primcount);
 }
 
 void ANGLEInstancedArrays::vertexAttribDivisorANGLE(GC3Duint index, GC3Duint divisor)
 {
-    if (m_context->isContextLost())
+    if (m_context.isContextLost())
         return;
-    m_context->vertexAttribDivisor(index, divisor);
+    m_context.vertexAttribDivisor(index, divisor);
 }
 
 } // namespace WebCore