From 089a47d937247a6043f596512f52baea7071b9e7 Mon Sep 17 00:00:00 2001
From: James Gregory <james@james.id.au>
Date: Thu, 4 Apr 2013 22:20:59 -0700
Subject: [PATCH] Add method to CCNode class to allow uploading data to GPU.
 Call it from CCSprite.

---
 cocos2dx/base_nodes/CCNode.cpp     | 22 ++++++++++++++++++++++
 cocos2dx/sprite_nodes/CCSprite.cpp |  6 ++++++
 2 files changed, 28 insertions(+)

diff --git a/cocos2dx/base_nodes/CCNode.cpp b/cocos2dx/base_nodes/CCNode.cpp
index 35ec2846b7..3751f267fb 100644
--- a/cocos2dx/base_nodes/CCNode.cpp
+++ b/cocos2dx/base_nodes/CCNode.cpp
@@ -88,6 +88,10 @@ CCNode::CCNode(void)
 , m_bReorderChildDirty(false)
 , m_nScriptHandler(0)
 , m_nUpdateScriptHandler(0)
+#ifdef EMSCRIPTEN
+, m_bufferObject(0)
+, m_bufferSize(0)
+#endif // EMSCRIPTEN
 {
     // set default scheduler and actionManager
     CCDirector *director = CCDirector::sharedDirector();
@@ -1192,6 +1196,24 @@ void CCNode::setAdditionalTransform(const CCAffineTransform& additionalTransform
     m_bAdditionalTransformDirty = true;
 }
 
+#ifdef EMSCRIPTEN
+void CCNode::setGLBufferData(void *buf, GLuint bufSize)
+{
+    // WebGL doesn't support client-side arrays, so generate a buffer and load the data first.
+    if(m_bufferSize < bufSize)
+    {
+        if(m_bufferObject)
+        {
+            glDeleteBuffers(1, &m_bufferObject);
+        }
+        glGenBuffers(1, &m_bufferObject);
+        m_bufferSize = bufSize;
+    }
+    glBindBuffer(GL_ARRAY_BUFFER, m_bufferObject);
+    glBufferData(GL_ARRAY_BUFFER, bufSize, buf, GL_STATIC_DRAW);
+}
+#endif // EMSCRIPTEN
+
 CCAffineTransform CCNode::parentToNodeTransform(void)
 {
     if ( m_bInverseDirty ) {
diff --git a/cocos2dx/sprite_nodes/CCSprite.cpp b/cocos2dx/sprite_nodes/CCSprite.cpp
index ee47318d8f..3984e4ff1a 100644
--- a/cocos2dx/sprite_nodes/CCSprite.cpp
+++ b/cocos2dx/sprite_nodes/CCSprite.cpp
@@ -83,6 +83,7 @@ CCSprite* CCSprite::createWithTexture(CCTexture2D *pTexture, const CCRect& rect)
 
 CCSprite* CCSprite::create(const char *pszFileName)
 {
+    printf("CCSprite::create(%s)\n", pszFileName);
     CCSprite *pobSprite = new CCSprite();
     if (pobSprite && pobSprite->initWithFile(pszFileName))
     {
@@ -569,7 +570,12 @@ void CCSprite::draw(void)
     ccGLEnableVertexAttribs( kCCVertexAttribFlag_PosColorTex );
 
 #define kQuadSize sizeof(m_sQuad.bl)
+#ifdef EMSCRIPTEN
+    long offset = 0;
+    setGLBufferData(&m_sQuad, 4 * kQuadSize);
+#else
     long offset = (long)&m_sQuad;
+#endif // EMSCRIPTEN
 
     // vertex
     int diff = offsetof( ccV3F_C4B_T2F, vertices);