axmol/cocos/renderer/CCQuadCommand.cpp

/****************************************************************************
 Copyright (c) 2013-2014 Chukong Technologies Inc.

 http://www.cocos2d-x.org

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
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 all copies or substantial portions of the Software.

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 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 ****************************************************************************/


#include "renderer/CCQuadCommand.h"
#include "renderer/ccGLStateCache.h"
#include "xxhash.h"

NS_CC_BEGIN


static  void convertIntToByteArray(int value, int* output)
{
    *output = value;
}

QuadCommand::QuadCommand()
:_materialID(0)
,_textureID(0)
,_shader(nullptr)
,_blendType(BlendFunc::DISABLE)
,_quads(nullptr)
,_quadsCount(0)
{
    _type = RenderCommand::Type::QUAD_COMMAND;
}

void QuadCommand::init(float globalOrder, GLuint textureID, GLProgram* shader, BlendFunc blendType, V3F_C4B_T2F_Quad* quad, ssize_t quadCount, const Matrix &mv)
{
    _globalOrder = globalOrder;

    _quadsCount = quadCount;
    _quads = quad;

    _mv = mv;

    if( _textureID != textureID || _blendType.src != blendType.src || _blendType.dst != blendType.dst || _shader != shader) {
        
        _textureID = textureID;
        _blendType = blendType;
        _shader = shader;
        
        generateMaterialID();
    }
}

QuadCommand::~QuadCommand()
{
}

void QuadCommand::generateMaterialID()
{
    //TODO fix blend id generation
    int blendID = 0;
    if(_blendType == BlendFunc::DISABLE)
    {
        blendID = 0;
    }
    else if(_blendType == BlendFunc::ALPHA_PREMULTIPLIED)
    {
        blendID = 1;
    }
    else if(_blendType == BlendFunc::ALPHA_NON_PREMULTIPLIED)
    {
        blendID = 2;
    }
    else if(_blendType == BlendFunc::ADDITIVE)
    {
        blendID = 3;
    }
    else
    {
        blendID = 4;
    }
    
    // convert program id, texture id and blend id into byte array
    int intArray[3];
    convertIntToByteArray(_shader->getProgram(), intArray);
    convertIntToByteArray(blendID, intArray+1);
    convertIntToByteArray(_textureID, intArray+2);
    
    _materialID = XXH32((const void*)intArray, sizeof(intArray), 0);
}

void QuadCommand::useMaterial() const
{
    _shader->use();
    _shader->setUniformsForBuiltins(_mv);

    //Set texture
    GL::bindTexture2D(_textureID);

    //set blend mode
    GL::blendFunc(_blendType.src, _blendType.dst);
}

NS_CC_END