axmol/cocos/2d/renderer/CCQuadCommand.cpp

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

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

NS_CC_BEGIN

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

void QuadCommand::init(float globalOrder, GLuint textureID, GLProgram* shader, BlendFunc blendType, V3F_C4B_T2F_Quad* quad, ssize_t quadCount, const kmMat4 &mv)
{
    _globalOrder = globalOrder;
    _textureID = textureID;
    _blendType = blendType;
    _shader = shader;

    _quadsCount = quadCount;
    _quads = quad;

    _mv = mv;

    generateMaterialID();
}

QuadCommand::~QuadCommand()
{
}

void QuadCommand::generateMaterialID()
{
    //Generate Material ID
    //TODO fix shader ID generation
    CCASSERT(_shader->getProgram() < pow(2,10), "ShaderID is greater than 2^10");
    //TODO fix texture ID generation
    CCASSERT(_textureID < pow(2,18), "TextureID is greater than 2^18");

    //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;
    }

    //TODO Material ID should be part of the ID
    //
    // Temporal hack (later, these 32-bits should be packed in 24-bits
    //
    // +---------------------+-------------------+----------------------------------------+
    // | Shader ID (10 bits) | Blend ID (4 bits) | empty (18bits) |  Texture ID (32 bits) |
    // +---------------------+-------------------+----------------------------------------+

    _materialID = (uint64_t)_shader->getProgram() << 54
            | (uint64_t)blendID << 50
            | (uint64_t)_textureID << 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