India/cocos2d-x/cocos/renderer/CCQuadCommand.cpp

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 Copyright (c) 2013-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

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#include "renderer/CCQuadCommand.h"

#include "renderer/ccGLStateCache.h"
#include "renderer/CCGLProgram.h"
#include "renderer/CCMaterial.h"
#include "renderer/CCTechnique.h"
#include "renderer/CCRenderer.h"
#include "renderer/CCPass.h"
#include "renderer/CCTexture2D.h"

NS_CC_BEGIN

int QuadCommand::__indexCapacity = -1;
GLushort* QuadCommand::__indices = nullptr;

QuadCommand::QuadCommand():
_indexSize(-1),
_ownedIndices()
{
}

QuadCommand::~QuadCommand()
{
    for (auto& indices : _ownedIndices)
    {
        CC_SAFE_DELETE_ARRAY(indices);
    }
}

void QuadCommand::init(float globalOrder, GLuint textureID, GLProgramState* glProgramState, const BlendFunc& blendType, V3F_C4B_T2F_Quad* quads, ssize_t quadCount,
                       const Mat4& mv, uint32_t flags)
{
    CCASSERT(glProgramState, "Invalid GLProgramState");
    CCASSERT(glProgramState->getVertexAttribsFlags() == 0, "No custom attributes are supported in QuadCommand");

    if (quadCount * 6 > _indexSize)
        reIndex((int)quadCount*6);

    Triangles triangles;
    triangles.verts = &quads->tl;
    triangles.vertCount = (int)quadCount * 4;
    triangles.indices = __indices;
    triangles.indexCount = (int)quadCount * 6;
    TrianglesCommand::init(globalOrder, textureID, glProgramState, blendType, triangles, mv, flags);
}

void QuadCommand::reIndex(int indicesCount)
{
    // first time init: create a decent buffer size for indices to prevent too much resizing
    if (__indexCapacity == -1)
    {
        indicesCount = std::max(indicesCount, 2048);
    }

    if (indicesCount > __indexCapacity)
    {
        // if resizing is needed, get needed size plus 25%, but not bigger that max size
        indicesCount *= 1.25;
        indicesCount = std::min(indicesCount, 65536);

        CCLOG("cocos2d: QuadCommand: resizing index size from [%d] to [%d]", __indexCapacity, indicesCount);

        _ownedIndices.push_back(__indices);
        __indices = new (std::nothrow) GLushort[indicesCount];
        __indexCapacity = indicesCount;
    }

    for( int i=0; i < __indexCapacity/6; i++)
    {
        __indices[i*6+0] = (GLushort) (i*4+0);
        __indices[i*6+1] = (GLushort) (i*4+1);
        __indices[i*6+2] = (GLushort) (i*4+2);
        __indices[i*6+3] = (GLushort) (i*4+3);
        __indices[i*6+4] = (GLushort) (i*4+2);
        __indices[i*6+5] = (GLushort) (i*4+1);
    }

    _indexSize = indicesCount;
}

void QuadCommand::init(float globalOrder, GLuint textureID, GLProgramState* shader, const BlendFunc& blendType, V3F_C4B_T2F_Quad* quads, ssize_t quadCount, const Mat4 &mv)
{
    init(globalOrder, textureID, shader, blendType, quads, quadCount, mv, 0);
}

void QuadCommand::init(float globalOrder, Texture2D* texture, GLProgramState* glProgramState, const BlendFunc& blendType, V3F_C4B_T2F_Quad* quads, ssize_t quadCount,
    const Mat4& mv, uint32_t flags)
{
    init(globalOrder, texture->getName(), glProgramState, blendType, quads, quadCount, mv, flags);
    _alphaTextureID = texture->getAlphaTextureName();
}

NS_CC_END