spine-runtimes/spine-cocos2dx/src/spine/SkeletonBatch.cpp

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#include <spine/SkeletonBatch.h>
#include <spine/Extension.h>
#include <algorithm>

USING_NS_CC;
#define EVENT_AFTER_DRAW_RESET_POSITION "director_after_draw"
using std::max;
#define INITIAL_SIZE (10000)

namespace spine {

static SkeletonBatch* instance = nullptr;

SkeletonBatch* SkeletonBatch::getInstance () {
	if (!instance) instance = new SkeletonBatch();
	return instance;
}

void SkeletonBatch::destroyInstance () {
	if (instance) {
		delete instance;
		instance = nullptr;
	}
}

SkeletonBatch::SkeletonBatch () {
	for (unsigned int i = 0; i < INITIAL_SIZE; i++) {
		_commandsPool.push_back(new TrianglesCommand());
	}

	reset ();

	// callback after drawing is finished so we can clear out the batch state
	// for the next frame
	Director::getInstance()->getEventDispatcher()->addCustomEventListener(EVENT_AFTER_DRAW_RESET_POSITION, [this](EventCustom* eventCustom){
		this->update(0);
	});;
}

SkeletonBatch::~SkeletonBatch () {
	Director::getInstance()->getEventDispatcher()->removeCustomEventListeners(EVENT_AFTER_DRAW_RESET_POSITION);

	for (unsigned int i = 0; i < _commandsPool.size(); i++) {
		delete _commandsPool[i];
		_commandsPool[i] = nullptr;
	}
}

void SkeletonBatch::update (float delta) {
	reset();
}

cocos2d::V3F_C4B_T2F* SkeletonBatch::allocateVertices(uint32_t numVertices) {
	if (_vertices.size() - _numVertices < numVertices) {
		cocos2d::V3F_C4B_T2F* oldData = _vertices.data();
		_vertices.resize((_vertices.size() + numVertices) * 2 + 1);
		cocos2d::V3F_C4B_T2F* newData = _vertices.data();
		for (uint32_t i = 0; i < this->_nextFreeCommand; i++) {
			TrianglesCommand* command = _commandsPool[i];
			cocos2d::TrianglesCommand::Triangles& triangles = (cocos2d::TrianglesCommand::Triangles&)command->getTriangles();
			triangles.verts = newData + (triangles.verts - oldData);
		}
	}

	cocos2d::V3F_C4B_T2F* vertices = _vertices.data() + _numVertices;
	_numVertices += numVertices;
	return vertices;
}

void SkeletonBatch::deallocateVertices(uint32_t numVertices) {
	_numVertices -= numVertices;
}


unsigned short* SkeletonBatch::allocateIndices(uint32_t numIndices) {
	if (_indices.getCapacity() - _indices.size() < numIndices) {
		unsigned short* oldData = _indices.buffer();
		int oldSize = _indices.size();
		_indices.ensureCapacity(_indices.size() + numIndices);
		unsigned short* newData = _indices.buffer();
		for (uint32_t i = 0; i < this->_nextFreeCommand; i++) {
			TrianglesCommand* command = _commandsPool[i];
			cocos2d::TrianglesCommand::Triangles& triangles = (cocos2d::TrianglesCommand::Triangles&)command->getTriangles();
			if (triangles.indices >= oldData && triangles.indices < oldData + oldSize) {
				triangles.indices = newData + (triangles.indices - oldData);
			}
		}
	}

	unsigned short* indices = _indices.buffer() + _indices.size();
	_indices.setSize(_indices.size() + numIndices, 0);
	return indices;
}

void SkeletonBatch::deallocateIndices(uint32_t numIndices) {
	_indices.setSize(_indices.size() - numIndices, 0);
}


cocos2d::TrianglesCommand* SkeletonBatch::addCommand(cocos2d::Renderer* renderer, float globalOrder, cocos2d::Texture2D* texture, cocos2d::GLProgramState* glProgramState, cocos2d::BlendFunc blendType, const cocos2d::TrianglesCommand::Triangles& triangles, const cocos2d::Mat4& mv, uint32_t flags) {
	TrianglesCommand* command = nextFreeCommand();
	command->init(globalOrder, texture, glProgramState, blendType, triangles, mv, flags);
	renderer->addCommand(command);
	return command;
}

void SkeletonBatch::reset() {
	_nextFreeCommand = 0;
	_numVertices = 0;
	_indices.setSize(0, 0);
}

cocos2d::TrianglesCommand* SkeletonBatch::nextFreeCommand() {
	if (_commandsPool.size() <= _nextFreeCommand) {
		unsigned int newSize = _commandsPool.size() * 2 + 1;
		for (int i = _commandsPool.size(); i < newSize; i++) {
			_commandsPool.push_back(new TrianglesCommand());
		}
	}
	return _commandsPool[_nextFreeCommand++];
}
}