Implement WEBGL_shared_resources

Source/core/html/canvas/WebGLProgram.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 46 matching lines @@
     if (m_vertexShader) {
         m_vertexShader->onDetached(context3d);
         m_vertexShader = 0;
     }
     if (m_fragmentShader) {
         m_fragmentShader->onDetached(context3d);
         m_fragmentShader = 0;
     }
 }
 
-unsigned WebGLProgram::numActiveAttribLocations()
+unsigned WebGLProgram::numActiveAttribLocations(WebGLRenderingContext* context)
 {
-    cacheInfoIfNeeded();
+    cacheInfoIfNeeded(context);
     return m_activeAttribLocations.size();
 }
 
-GC3Dint WebGLProgram::getActiveAttribLocation(GC3Duint index)
+GC3Dint WebGLProgram::getActiveAttribLocation(WebGLRenderingContext* context, GC3Duint index)
 {
-    cacheInfoIfNeeded();
-    if (index >= numActiveAttribLocations())
+    cacheInfoIfNeeded(context);
+    if (index >= numActiveAttribLocations(context))
         return -1;
     return m_activeAttribLocations[index];
 }
 
-bool WebGLProgram::isUsingVertexAttrib0()
+bool WebGLProgram::isUsingVertexAttrib0(WebGLRenderingContext* context)
 {
-    cacheInfoIfNeeded();
-    for (unsigned ii = 0; ii < numActiveAttribLocations(); ++ii) {
-        if (!getActiveAttribLocation(ii))
+    cacheInfoIfNeeded(context);
+    unsigned numLocations = numActiveAttribLocations(context);
+    for (unsigned ii = 0; ii < numLocations; ++ii) {
+        if (!getActiveAttribLocation(context, ii))
             return true;
     }
     return false;
 }
 
-bool WebGLProgram::getLinkStatus()
+bool WebGLProgram::getLinkStatus(WebGLRenderingContext* context)
 {
-    cacheInfoIfNeeded();
+    cacheInfoIfNeeded(context);
     return m_linkStatus;
 }
 
-void WebGLProgram::setLinkStatus(bool status)
+void WebGLProgram::setLinkStatus(WebGLRenderingContext* context, bool status)
 {
-    cacheInfoIfNeeded();
+    cacheInfoIfNeeded(context);
     m_linkStatus = status;
 }
 
 void WebGLProgram::increaseLinkCount()
 {
     ++m_linkCount;
     m_infoValid = false;
 }
 
 WebGLShader* WebGLProgram::getAttachedShader(GC3Denum type)
@@ skipping 55 matching lines @@
     GC3Dint numAttribs = 0;
     context3d->getProgramiv(object(), GraphicsContext3D::ACTIVE_ATTRIBUTES, &numAttribs);
     m_activeAttribLocations.resize(static_cast<size_t>(numAttribs));
     for (int i = 0; i < numAttribs; ++i) {
         ActiveInfo info;
         context3d->getActiveAttrib(object(), i, info);
         m_activeAttribLocations[i] = context3d->getAttribLocation(object(), info.name.charactersWithNullTermination());
     }
 }
 
-void WebGLProgram::cacheInfoIfNeeded()
+void WebGLProgram::cacheInfoIfNeeded(WebGLRenderingContext* context)
 {
     if (m_infoValid)
         return;
 
     if (!object())
         return;
 
-    GraphicsContext3D* context = getAGraphicsContext3D();
+    GraphicsContext3D* gc3d = context->graphicsContext3D();
     if (!context)
         return;
     GC3Dint linkStatus = 0;
-    context->getProgramiv(object(), GraphicsContext3D::LINK_STATUS, &linkStatus);
+    gc3d->getProgramiv(object(), GraphicsContext3D::LINK_STATUS, &linkStatus);
     m_linkStatus = linkStatus;
     if (m_linkStatus)
-        cacheActiveAttribLocations(context);
+        cacheActiveAttribLocations(gc3d);
     m_infoValid = true;
 }
 
 }