TexturePacker工具专用用来对多张图片进行打包成一张大图片
其目的是:1.节约内存空间,2.减少纹理渲染的次数
因为Android和iOS的游戏,都是通过OpenGL ES进行渲染,
而OpenGL ES要求纹理的尺寸必须为2的n次方,
如果不是,则会扩大至最近的2的n次方的尺寸(通过填充透明像素)
最重要的是:纹理渲染非常消耗性能,
如果每于每一张小图片,分别进行渲染,则都要经过三个步骤:
准备渲染、开始渲染、结束渲染
但是,如果用TP将,所有小图片,合成一张大图片,
则只需渲染一次(即只需对大图片进行:准备渲染、开始渲染、结束渲染)
这将大大提升性能
举例说明,有一张260x260像素的32位色图,
它在内存中大概占270KB(260 x 260 x 32 / 8 = 270400B),
但受纹理尺寸的限制,纹理的尺寸必须是2的n次幂,
系统将自动生成一张最接近原图尺寸的(只会比原图尺寸大)、宽高都为2的n次幂的纹理,
因此,系统将会生成一张512x512像素的纹理,
并且,最终会占用1MB的内存(512 x 512 x 32 / 8 = 1048576B),
可以看出,实际占用的内存竟然是原图所需内存的4倍。
解决办法就是将这张260x260像素的图像改为256x256像素,系统也将生成256x256像素的纹理。
它合成后的大图片,支持以下多种框架
它由一位叫做Andreas Loew的老外开发。下面是他的推特帐号、脸谱帐号
下载下来,如图所示:
打开应用,界面如下:
一、点击Add Folder(打开一个包含n多图片的folder)
二、将包含赵云所有图片的文件夹选中
三、设置各项参数,此时,界面如下:
下面是相关的参数设置:
data Format选项,支持的格式有:
Data Filename:生成的目标文件名
Texture Format:
Image Format:
推荐:RGBA4444,即RGBA分别用4位表示
Dithering【犹豫不决】抖动处理???
选择:FloydSteinberg???
当Algorithm为MaxRects时:
当Algorithm为Basic时:
当Allow Rotation为NO时:
四、点击 发布【Publish】,会生成一个大png和一个plist文件
注意:Save是保存TP工程,生成TPS文件
Plist文件内容如下:
字典:键是图片名,如1.png
值是一个字典,键有:frame、offset、rotated、sourceSize、sourceColorRect
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>frames</key> <dict> <key>1.png</key> <dict> <key>frame</key> <string>{{2,416},{92,107}}</string> <key>offset</key> <string>{-29,-26}</string> <key>rotated</key> <true/> <key>sourceColorRect</key> <string>{{91,56},{92,107}}</string> <key>sourceSize</key> <string>{332,167}</string> </dict> <key>10.png</key> <dict> <key>frame</key> <string>{{111,414},{184,81}}</string> <key>offset</key> <string>{-3,-29}</string> <key>rotated</key> <false/> <key>sourceColorRect</key> <string>{{71,72},{184,81}}</string> <key>sourceSize</key> <string>{332,167}</string> </dict> <key>2.png</key> <dict> <key>frame</key> <string>{{2,224},{190,81}}</string> <key>offset</key> <string>{-71,-29}</string> <key>rotated</key> <true/> <key>sourceColorRect</key> <string>{{0,72},{190,81}}</string> <key>sourceSize</key> <string>{332,167}</string> </dict> <key>3.png</key> <dict> <key>frame</key> <string>{{297,337},{136,127}}</string> <key>offset</key> <string>{-46,-6}</string> <key>rotated</key> <true/> <key>sourceColorRect</key> <string>{{52,26},{136,127}}</string> <key>sourceSize</key> <string>{332,167}</string> </dict> <key>4.png</key> <dict> <key>frame</key> <string>{{297,182},{158,153}}</string> <key>offset</key> <string>{-59,7}</string> <key>rotated</key> <false/> <key>sourceColorRect</key> <string>{{28,0},{158,153}}</string> <key>sourceSize</key> <string>{332,167}</string> </dict> <key>5.png</key> <dict> <key>frame</key> <string>{{85,224},{188,149}}</string> <key>offset</key> <string>{-12,5}</string> <key>rotated</key> <true/> <key>sourceColorRect</key> <string>{{60,4},{188,149}}</string> <key>sourceSize</key> <string>{332,167}</string> </dict> <key>6.png</key> <dict> <key>frame</key> <string>{{2,2},{242,143}}</string> <key>offset</key> <string>{45,2}</string> <key>rotated</key> <false/> <key>sourceColorRect</key> <string>{{90,10},{242,143}}</string> <key>sourceSize</key> <string>{332,167}</string> </dict> <key>7.png</key> <dict> <key>frame</key> <string>{{246,2},{242,119}}</string> <key>offset</key> <string>{45,-10}</string> <key>rotated</key> <false/> <key>sourceColorRect</key> <string>{{90,34},{242,119}}</string> <key>sourceSize</key> <string>{332,167}</string> </dict> <key>8.png</key> <dict> <key>frame</key> <string>{{246,123},{232,57}}</string> <key>offset</key> <string>{40,-41}</string> <key>rotated</key> <false/> <key>sourceColorRect</key> <string>{{90,96},{232,57}}</string> <key>sourceSize</key> <string>{332,167}</string> </dict> <key>9.png</key> <dict> <key>frame</key> <string>{{2,147},{198,75}}</string> <key>offset</key> <string>{24,-32}</string> <key>rotated</key> <false/> <key>sourceColorRect</key> <string>{{91,78},{198,75}}</string> <key>sourceSize</key> <string>{332,167}</string> </dict> </dict> <key>metadata</key> <dict> <key>format</key> <integer>2</integer> <key>realTextureFileName</key> <string>zhaoyun.png</string> <key>size</key> <string>{512,512}</string> <key>smartupdate</key> <string>$TexturePacker:SmartUpdate:aae1cbd56ecaac00aa0364cad5d7b3d2:1/1$</string> <key>textureFileName</key> <string>zhaoyun.png</string> </dict> </dict> </plist>
最终合成的图片:
Plist文件一览: