【cocos2dx】ttf文本纹理内存优化，加上打印对比工具

参照：https://blog.youkuaiyun.com/ghost0620/article/details/52574020

 

1：添加打印接口

参照图片内存打印的方法，添加ttf文本纹理打印，方便和策划沟通如何在文本这一块进行优化

std::string FontAtlasCache::getCachedTextureInfo()
{	
	std::string buffer;
	char buftmp[4096];

	unsigned int count = 0;
	unsigned int totalBytes = 0;
	auto atlasMapCopy = _atlasMap;
	for (auto&& atlas : atlasMapCopy) {
		std::unordered_map<ssize_t, Texture2D*> _textures = atlas.second->getTextures();
		for (auto& texture : _textures) {
			memset(buftmp, 0, sizeof(buftmp));
			Texture2D* tex = texture.second;
			unsigned int bpp = tex->getBitsPerPixelForFormat();
			// Each texture takes up width * height * bytesPerPixel bytes.
			auto bytes = tex->getPixelsWide() * tex->getPixelsHigh() * bpp / 8;
			totalBytes += bytes;
			count++;
			snprintf(buftmp, sizeof(buftmp) - 1, "\"%s\" page = %lu rc=%lu id=%lu %lu x %lu @ %ld bpp => %lu KB\n",
				atlas.first.c_str(),
				(long)texture.first,
				(long)tex->getReferenceCount(),
				(long)tex->getName(),
				(long)tex->getPixelsWide(),
				(long)tex->getPixelsHigh(),
				(long)bpp,
				(long)bytes / 1024);

			buffer += buftmp;
		}
	}

	snprintf(buftmp, sizeof(buftmp) - 1, "FontAtlasCache dumpDebugInfo: %ld textures, for %lu KB (%.2f MB)\n", (long)count, (long)totalBytes / 1024, totalBytes / (1024.0f*1024.0f));
	buffer += buftmp;

	return buffer;
}

 

2：对比优化效果

纹路默认大小改之前：

改之后， 可以看到占用内存确实是少了一大截，虽然某个字体可能因为内容过多，申请了5张纹理图