axmol/cocos/renderer/CCTextureAtlas.cpp

/****************************************************************************
Copyright (c) 2008-2010 Ricardo Quesada
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2011      Zynga Inc.
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

http://www.cocos2d-x.org

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all copies or substantial portions of the Software.

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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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****************************************************************************/

#include "renderer/CCTextureAtlas.h"

#include <stdlib.h>

#include "base/ccMacros.h"
#include "base/ccUTF8.h"
#include "base/CCEventType.h"
#include "base/CCDirector.h"
#include "base/CCConfiguration.h"
#include "base/CCEventDispatcher.h"
#include "base/CCEventListenerCustom.h"
#include "renderer/CCTextureCache.h"
#include "renderer/CCRenderer.h"
#include "renderer/CCTexture2D.h"

// According to some tests GL_TRIANGLE_STRIP is slower, MUCH slower. Probably I'm doing something very wrong

// implementation TextureAtlas

NS_CC_BEGIN

TextureAtlas::TextureAtlas() {}

TextureAtlas::~TextureAtlas()
{
    CCLOGINFO("deallocing TextureAtlas: %p", this);

    CC_SAFE_FREE(_quads);
    CC_SAFE_FREE(_indices);

    CC_SAFE_RELEASE(_texture);

#if CC_ENABLE_CACHE_TEXTURE_DATA
    Director::getInstance()->getEventDispatcher()->removeEventListener(_rendererRecreatedListener);
#endif
}

size_t TextureAtlas::getTotalQuads() const
{
    return _totalQuads;
}

size_t TextureAtlas::getCapacity() const
{
    return _capacity;
}

Texture2D* TextureAtlas::getTexture() const
{
    return _texture;
}

void TextureAtlas::setTexture(Texture2D* var)
{
    CC_SAFE_RETAIN(var);
    CC_SAFE_RELEASE(_texture);
    _texture = var;
}

V3F_C4B_T2F_Quad* TextureAtlas::getQuads()
{
    // if someone accesses the quads directly, presume that changes will be made
    _dirty = true;
    return _quads;
}

void TextureAtlas::setQuads(V3F_C4B_T2F_Quad* quads)
{
    _quads = quads;
}

// TextureAtlas - alloc & init

TextureAtlas* TextureAtlas::create(std::string_view file, ssize_t capacity)
{
    TextureAtlas* textureAtlas = new TextureAtlas();
    if (textureAtlas->initWithFile(file, capacity))
    {
        textureAtlas->autorelease();
        return textureAtlas;
    }
    CC_SAFE_DELETE(textureAtlas);
    return nullptr;
}

TextureAtlas* TextureAtlas::createWithTexture(Texture2D* texture, ssize_t capacity)
{
    TextureAtlas* textureAtlas = new TextureAtlas();
    if (textureAtlas->initWithTexture(texture, capacity))
    {
        textureAtlas->autorelease();
        return textureAtlas;
    }
    CC_SAFE_DELETE(textureAtlas);
    return nullptr;
}

bool TextureAtlas::initWithFile(std::string_view file, ssize_t capacity)
{
    // retained in property
    Texture2D* texture = Director::getInstance()->getTextureCache()->addImage(file);

    if (texture)
    {
        return initWithTexture(texture, capacity);
    }
    else
    {
        CCLOG("cocos2d: Could not open file: %s", file.data());
        return false;
    }
}

bool TextureAtlas::initWithTexture(Texture2D* texture, ssize_t capacity)
{
    CCASSERT(capacity >= 0, "Capacity must be >= 0");

    //    CCASSERT(texture != nullptr, "texture should not be null");
    _capacity   = capacity;
    _totalQuads = 0;

    // retained in property
    this->_texture = texture;
    CC_SAFE_RETAIN(_texture);

    // Re-initialization is not allowed
    CCASSERT(_quads == nullptr && _indices == nullptr, "_quads and _indices should be nullptr.");

    _quads   = (V3F_C4B_T2F_Quad*)malloc(_capacity * sizeof(V3F_C4B_T2F_Quad));
    _indices = (uint16_t*)malloc(_capacity * 6 * sizeof(uint16_t));

    if (!(_quads && _indices) && _capacity > 0)
    {
        // CCLOG("cocos2d: TextureAtlas: not enough memory");
        CC_SAFE_FREE(_quads);
        CC_SAFE_FREE(_indices);

        // release texture, should set it to null, because the destruction will
        // release it too. see cocos2d-x issue #484
        CC_SAFE_RELEASE_NULL(_texture);
        return false;
    }

    memset(_quads, 0, _capacity * sizeof(V3F_C4B_T2F_Quad));
    memset(_indices, 0, _capacity * 6 * sizeof(uint16_t));

    this->setupIndices();

    _dirty = true;

    return true;
}

std::string TextureAtlas::getDescription() const
{
    return StringUtils::format("<TextureAtlas | totalQuads = %d>", static_cast<int>(_totalQuads));
}

void TextureAtlas::setupIndices()
{
    if (_capacity == 0)
        return;

    for (int i = 0; i < _capacity; i++)
    {
        _indices[i * 6 + 0] = i * 4 + 0;
        _indices[i * 6 + 1] = i * 4 + 1;
        _indices[i * 6 + 2] = i * 4 + 2;

        // inverted index. issue #179
        _indices[i * 6 + 3] = i * 4 + 3;
        _indices[i * 6 + 4] = i * 4 + 2;
        _indices[i * 6 + 5] = i * 4 + 1;
    }
}

// TextureAtlas - Update, Insert, Move & Remove

void TextureAtlas::updateQuad(V3F_C4B_T2F_Quad* quad, ssize_t index)
{
    CCASSERT(index >= 0 && index < _capacity, "updateQuadWithTexture: Invalid index");

    _totalQuads = MAX(index + 1, _totalQuads);

    _quads[index] = *quad;

    _dirty = true;
}

void TextureAtlas::insertQuad(V3F_C4B_T2F_Quad* quad, ssize_t index)
{
    CCASSERT(index >= 0 && index < _capacity, "insertQuadWithTexture: Invalid index");

    _totalQuads++;
    CCASSERT(_totalQuads <= _capacity, "invalid totalQuads");

    // issue #575. index can be > totalQuads
    auto remaining = (_totalQuads - 1) - index;

    // last object doesn't need to be moved
    if (remaining > 0)
    {
        // texture coordinates
        memmove(&_quads[index + 1], &_quads[index], sizeof(_quads[0]) * remaining);
    }

    _quads[index] = *quad;

    _dirty = true;
}

void TextureAtlas::insertQuads(V3F_C4B_T2F_Quad* quads, ssize_t index, ssize_t amount)
{
    CCASSERT(index >= 0 && amount >= 0 && index + amount <= _capacity, "insertQuadWithTexture: Invalid index + amount");

    _totalQuads += amount;

    CCASSERT(_totalQuads <= _capacity, "invalid totalQuads");

    // issue #575. index can be > totalQuads
    auto remaining = (_totalQuads - 1) - index - amount;

    // last object doesn't need to be moved
    if (remaining > 0)
    {
        // tex coordinates
        memmove(&_quads[index + amount], &_quads[index], sizeof(_quads[0]) * remaining);
    }

    auto max = index + amount;
    int j    = 0;
    for (ssize_t i = index; i < max; i++)
    {
        _quads[index] = quads[j];
        index++;
        j++;
    }

    _dirty = true;
}

void TextureAtlas::insertQuadFromIndex(ssize_t oldIndex, ssize_t newIndex)
{
    CCASSERT(newIndex >= 0 && newIndex < _totalQuads, "insertQuadFromIndex:atIndex: Invalid index");
    CCASSERT(oldIndex >= 0 && oldIndex < _totalQuads, "insertQuadFromIndex:atIndex: Invalid index");

    if (oldIndex == newIndex)
    {
        return;
    }
    // because it is ambiguous in iphone, so we implement abs ourselves
    // unsigned int howMany = std::abs( oldIndex - newIndex);
    auto howMany = (oldIndex - newIndex) > 0 ? (oldIndex - newIndex) : (newIndex - oldIndex);
    auto dst     = oldIndex;
    auto src     = oldIndex + 1;
    if (oldIndex > newIndex)
    {
        dst = newIndex + 1;
        src = newIndex;
    }

    // texture coordinates
    V3F_C4B_T2F_Quad quadsBackup = _quads[oldIndex];
    memmove(&_quads[dst], &_quads[src], sizeof(_quads[0]) * howMany);
    _quads[newIndex] = quadsBackup;

    _dirty = true;
}

void TextureAtlas::removeQuadAtIndex(ssize_t index)
{
    CCASSERT(index >= 0 && index < _totalQuads, "removeQuadAtIndex: Invalid index");

    auto remaining = (_totalQuads - 1) - index;

    // last object doesn't need to be moved
    if (remaining)
    {
        // texture coordinates
        memmove(&_quads[index], &_quads[index + 1], sizeof(_quads[0]) * remaining);
    }

    _totalQuads--;

    _dirty = true;
}

void TextureAtlas::removeQuadsAtIndex(ssize_t index, ssize_t amount)
{
    CCASSERT(index >= 0 && amount >= 0 && index + amount <= _totalQuads,
             "removeQuadAtIndex: index + amount out of bounds");

    auto remaining = (_totalQuads) - (index + amount);

    _totalQuads -= amount;

    if (remaining)
    {
        memmove(&_quads[index], &_quads[index + amount], sizeof(_quads[0]) * remaining);
    }

    _dirty = true;
}

void TextureAtlas::removeAllQuads()
{
    _totalQuads = 0;
}

// TextureAtlas - Resize
bool TextureAtlas::resizeCapacity(ssize_t newCapacity)
{
    CCASSERT(newCapacity >= 0, "capacity >= 0");
    if (newCapacity == _capacity)
    {
        return true;
    }
    auto oldCapacity = _capacity;

    // update capacity and totalQuads
    _totalQuads = MIN(_totalQuads, newCapacity);
    _capacity   = newCapacity;

    V3F_C4B_T2F_Quad* tmpQuads = nullptr;
    uint16_t* tmpIndices       = nullptr;

    // when calling initWithTexture(fileName, 0) on bada device, calloc(0, 1) will fail and return nullptr,
    // so here must judge whether _quads and _indices is nullptr.

    ssize_t _quads_size    = sizeof(_quads[0]);
    ssize_t new_quads_size = _capacity * _quads_size;
    if (_quads == nullptr)
    {
        tmpQuads = (V3F_C4B_T2F_Quad*)malloc(new_quads_size);
        if (tmpQuads != nullptr)
        {
            memset(tmpQuads, 0, new_quads_size);
        }
    }
    else
    {
        tmpQuads = (V3F_C4B_T2F_Quad*)realloc(_quads, new_quads_size);
        if (tmpQuads != nullptr && _capacity > oldCapacity)
        {
            memset(tmpQuads + oldCapacity, 0, (_capacity - oldCapacity) * _quads_size);
        }
        _quads = nullptr;
    }

    ssize_t _indices_size = sizeof(_indices[0]);
    ssize_t new_size      = _capacity * 6 * _indices_size;

    if (_indices == nullptr)
    {
        tmpIndices = (uint16_t*)malloc(new_size);
        if (tmpIndices != nullptr)
        {
            memset(tmpIndices, 0, new_size);
        }
    }
    else
    {
        tmpIndices = (uint16_t*)realloc(_indices, new_size);
        if (tmpIndices != nullptr && _capacity > oldCapacity)
        {
            memset(tmpIndices + oldCapacity, 0, (_capacity - oldCapacity) * 6 * _indices_size);
        }
        _indices = nullptr;
    }

    if (!(tmpQuads && tmpIndices))
    {
        CCLOG("cocos2d: TextureAtlas: not enough memory");
        CC_SAFE_FREE(tmpQuads);
        CC_SAFE_FREE(tmpIndices);
        CC_SAFE_FREE(_quads);
        CC_SAFE_FREE(_indices);
        _capacity = _totalQuads = 0;
        return false;
    }

    _quads   = tmpQuads;
    _indices = tmpIndices;

    setupIndices();

    _dirty = true;

    return true;
}

void TextureAtlas::increaseTotalQuadsWith(ssize_t amount)
{
    CCASSERT(amount >= 0, "amount >= 0");
    _totalQuads += amount;
}

void TextureAtlas::moveQuadsFromIndex(ssize_t oldIndex, ssize_t amount, ssize_t newIndex)
{
    CCASSERT(oldIndex >= 0 && amount >= 0 && newIndex >= 0, "values must be >= 0");
    CCASSERT(newIndex + amount <= _totalQuads, "insertQuadFromIndex:atIndex: Invalid index");
    CCASSERT(oldIndex < _totalQuads, "insertQuadFromIndex:atIndex: Invalid index");

    if (oldIndex == newIndex)
    {
        return;
    }
    // create buffer
    size_t quadSize             = sizeof(V3F_C4B_T2F_Quad);
    V3F_C4B_T2F_Quad* tempQuads = (V3F_C4B_T2F_Quad*)malloc(quadSize * amount);
    memcpy(tempQuads, &_quads[oldIndex], quadSize * amount);

    if (newIndex < oldIndex)
    {
        // move quads from newIndex to newIndex + amount to make room for buffer
        memmove(&_quads[newIndex], &_quads[newIndex + amount], (oldIndex - newIndex) * quadSize);
    }
    else
    {
        // move quads above back
        memmove(&_quads[oldIndex], &_quads[oldIndex + amount], (newIndex - oldIndex) * quadSize);
    }
    memcpy(&_quads[newIndex], tempQuads, amount * quadSize);

    free(tempQuads);

    _dirty = true;
}

void TextureAtlas::moveQuadsFromIndex(ssize_t index, ssize_t newIndex)
{
    CCASSERT(index >= 0 && newIndex >= 0, "values must be >= 0");
    CCASSERT(newIndex + (_totalQuads - index) <= _capacity, "moveQuadsFromIndex move is out of bounds");

    memmove(_quads + newIndex, _quads + index, (_totalQuads - index) * sizeof(_quads[0]));
}

void TextureAtlas::fillWithEmptyQuadsFromIndex(ssize_t index, ssize_t amount)
{
    CCASSERT(index >= 0 && amount >= 0, "values must be >= 0");
    V3F_C4B_T2F_Quad quad;
    memset(&quad, 0, sizeof(quad));

    auto to = index + amount;
    for (ssize_t i = index; i < to; i++)
    {
        _quads[i] = quad;
    }
}

NS_CC_END