Fix Clipping Node

cocos/2d/CCNewDrawNode.cpp

@@ -4,6 +4,7 @@
 
 
 #include "CCNewDrawNode.h"
+#include "QuadCommand.h"
 
 NS_CC_BEGIN
 
@@ -39,7 +40,9 @@ bool NewDrawNode::init()
 
 void NewDrawNode::draw()
 {
+    updateTransform();
 
+//    QuadCommand* quadCommand = new QuadCommand(0, _vertexZ, 0, _shaderProgram, _blendFunc, )
 }
 
 NS_CC_END

cocos/2d/CCNewSprite.cpp

@@ -114,7 +114,7 @@ void NewSprite::draw(void)
 {
     updateTransform();
     //TODO implement z order
-    QuadCommand* renderCommand = new QuadCommand(0, _vertexZ,_texture->getName(), _shaderProgram, _blendFunc, &_quad, 1);
+    QuadCommand* renderCommand = new QuadCommand(0, _vertexZ, _texture->getName(), _shaderProgram, _blendFunc, &_quad, 1);
 
     Renderer::getInstance()->addCommand(renderCommand);
 }

cocos/2d/NewClippingNode.cpp

@@ -72,7 +72,11 @@ NewClippingNode::NewClippingNode()
     currentStencilFail = GL_KEEP;
     currentStencilPassDepthFail = GL_KEEP;
     currentStencilPassDepthPass = GL_KEEP;
-    GLboolean currentDepthWriteMask = GL_TRUE;
+    currentDepthWriteMask = GL_TRUE;
+
+    currentAlphaTestEnabled = GL_FALSE;
+    currentAlphaTestFunc = GL_ALWAYS;
+    currentAlphaTestRef = 1;
 }
 
 void NewClippingNode::visit()
@@ -104,11 +108,6 @@ void NewClippingNode::visit()
 
 void NewClippingNode::beforeVisit()
 {
-    // store the current stencil layer (position in the stencil buffer),
-    // this will allow nesting up to n ClippingNode,
-    // where n is the number of bits of the stencil buffer.
-    static GLint layer = -1;
-
     ///////////////////////////////////
     // INIT
 
@@ -182,6 +181,26 @@ void NewClippingNode::beforeVisit()
     glStencilFunc(GL_NEVER, mask_layer, mask_layer);
     glStencilOp(!_inverted ? GL_REPLACE : GL_ZERO, GL_KEEP, GL_KEEP);
 
+    // enable alpha test only if the alpha threshold < 1,
+    // indeed if alpha threshold == 1, every pixel will be drawn anyways
+#if (CC_TARGET_PLATFORM == CC_PLATFORM_MAC || CC_TARGET_PLATFORM == CC_PLATFORM_WINDOWS || CC_TARGET_PLATFORM == CC_PLATFORM_LINUX)
+//    GLboolean currentAlphaTestEnabled = GL_FALSE;
+//    GLenum currentAlphaTestFunc = GL_ALWAYS;
+//    GLclampf currentAlphaTestRef = 1;
+#endif
+    if (_alphaThreshold < 1) {
+#if (CC_TARGET_PLATFORM == CC_PLATFORM_MAC || CC_TARGET_PLATFORM == CC_PLATFORM_WINDOWS || CC_TARGET_PLATFORM == CC_PLATFORM_LINUX)
+        // manually save the alpha test state
+        currentAlphaTestEnabled = glIsEnabled(GL_ALPHA_TEST);
+        glGetIntegerv(GL_ALPHA_TEST_FUNC, (GLint *)&currentAlphaTestFunc);
+        glGetFloatv(GL_ALPHA_TEST_REF, &currentAlphaTestRef);
+        // enable alpha testing
+        glEnable(GL_ALPHA_TEST);
+        // check for OpenGL error while enabling alpha test
+        CHECK_GL_ERROR_DEBUG();
+        // pixel will be drawn only if greater than an alpha threshold
+        glAlphaFunc(GL_GREATER, _alphaThreshold);
+#else
         // since glAlphaTest do not exists in OES, use a shader that writes
         // pixel only if greater than an alpha threshold
         GLProgram *program = ShaderCache::getInstance()->getProgram(GLProgram::SHADER_NAME_POSITION_TEXTURE_ALPHA_TEST);
@@ -193,11 +212,29 @@ void NewClippingNode::beforeVisit()
         // XXX: we should have a way to apply shader to all nodes without having to do this
         setProgram(_stencil, program);
 
+#endif
+    }
+
     //Draw _stencil
 }
 
 void NewClippingNode::afterDrawStencil()
 {
+    // restore alpha test state
+    if (_alphaThreshold < 1)
+    {
+#if (CC_TARGET_PLATFORM == CC_PLATFORM_MAC || CC_TARGET_PLATFORM == CC_PLATFORM_WINDOWS || CC_TARGET_PLATFORM == CC_PLATFORM_LINUX)
+        // manually restore the alpha test state
+        glAlphaFunc(currentAlphaTestFunc, currentAlphaTestRef);
+        if (!currentAlphaTestEnabled)
+        {
+            glDisable(GL_ALPHA_TEST);
+        }
+#else
+// XXX: we need to find a way to restore the shaders of the stencil node and its childs
+#endif
+    }
+
     // restore the depth test state
     glDepthMask(currentDepthWriteMask);
     //if (currentDepthTestEnabled) {

cocos/2d/NewClippingNode.h

@@ -21,7 +21,7 @@ public:
 
     virtual ~NewClippingNode();
 
-    void visit();
+    virtual void visit() override;
 
 protected:
     NewClippingNode();
@@ -41,6 +41,10 @@ protected:
     GLenum currentStencilPassDepthPass;
     GLboolean currentDepthWriteMask;
 
+    GLboolean currentAlphaTestEnabled;
+    GLenum currentAlphaTestFunc;
+    GLclampf currentAlphaTestRef;
+
     GLint mask_layer_le;
 };
 

cocos/2d/renderer/Renderer.cpp

@@ -171,7 +171,7 @@ void Renderer::render()
                 {
                     memcpy(_quads + _numQuads, cmd->getQuad(), sizeof(V3F_C4B_T2F_Quad) * cmd->getQuadCount());
                     _numQuads += cmd->getQuadCount();
-                    _renderStack.top().currentIndex = _lastCommand = i;
+                    _lastCommand = i;
                 }
                 else
                 {
@@ -202,11 +202,15 @@ void Renderer::render()
             {
                 flush();
             }
+
+            _renderStack.top().currentIndex = i;
         }
 
         //Draw the batched quads
         drawBatchedQuads();
 
+        currRenderQueue = _renderGroups[_renderStack.top().renderQueueID];
+        len = currRenderQueue.size();
         //If pop the render stack if we already processed all the commands
         if(_renderStack.top().currentIndex + 1 >= len)
         {

samples/Cpp/TestCpp/Classes/NewRendererTest/NewRendererTest.cpp

@@ -271,20 +271,21 @@ NewClippingNodeTest::NewClippingNodeTest()
     clipper->runAction(RepeatForever::create(RotateBy::create(1, 45)));
     this->addChild(clipper);
 
-    auto stencil = NewDrawNode::create();
-    Point rectangle[4];
-    rectangle[0] = Point(0, 0);
-    rectangle[1] = Point(clipper->getContentSize().width, 0);
-    rectangle[2] = Point(clipper->getContentSize().width, clipper->getContentSize().height);
-    rectangle[3] = Point(0, clipper->getContentSize().height);
-
-    Color4F white(1, 1, 1, 1);
-    stencil->drawPolygon(rectangle, 4, white, 1, white);
-    clipper->setStencil(stencil);
-
-//    auto stencil = NewSprite::create("Images/background2.png");
+//    auto stencil = NewDrawNode::create();
+//    Point rectangle[4];
+//    rectangle[0] = Point(0, 0);
+//    rectangle[1] = Point(clipper->getContentSize().width, 0);
+//    rectangle[2] = Point(clipper->getContentSize().width, clipper->getContentSize().height);
+//    rectangle[3] = Point(0, clipper->getContentSize().height);
+//
+//    Color4F white(1, 1, 1, 1);
+//    stencil->drawPolygon(rectangle, 4, white, 1, white);
 //    clipper->setStencil(stencil);
 
+    auto stencil = NewSprite::create("Images/grossini.png");
+    stencil->setPosition(s.width/2, s.height/2);
+    clipper->setStencil(stencil);
+
     auto content = NewSprite::create("Images/background2.png");
     content->setTag( kTagContentNode );
     content->setAnchorPoint(  Point(0.5, 0.5) );