可能是 ID3DXSprite 的一个bug。

最近学习用d3d下的ID3DXSprite进行2D游戏的编程。发现一个问题，不知道是不是ID3DXSporite的bug，创建资源用的图像文件太大的话（我用的png 格式） ，然后进行Draw出来，会出现问题。贴一下代码

 

 

if(FAILED(D3DXCreateTextureFromFileEx(    lpdevice,
                                            "Panel3.png",
                                            4906,
                                            128,
                                            1,
                                            D3DPOOL_DEFAULT,
                                            D3DFMT_A8R8G8B8,
                                            D3DPOOL_DEFAULT,
                                            D3DX_DEFAULT,
                                            D3DX_DEFAULT,
                                            D3DCOLOR_XRGB(255,0,255),
                                            NULL,
                                            NULL,
                                            &lptexture)))

Panel3.png 是4906×128，

下面是Panel5.png，大小是 730×260

if(FAILED(D3DXCreateTextureFromFileEx(    lpdevice,
                                            "Panel5.png",
                                            730,
                                            260,
                                            1,
                                            D3DPOOL_DEFAULT,
                                            D3DFMT_A8R8G8B8,
                                            D3DPOOL_DEFAULT,
                                            D3DX_DEFAULT,
                                            D3DX_DEFAULT,
                                            D3DCOLOR_XRGB(255,0,255),
                                            NULL,
                                            NULL,
                                            &lptexture)))

最后把相同的rect通过下面函数Draw出来

RECT rect;
SetRect(&rect,0,0,180,128);            
lpsprite ->Draw(lptexture,&rect,NULL,NULL,D3DCOLOR_ARGB(255,255,255,255));

显示的东西会不一样，大文件Panel3.png 画出来的东西是x方向的两个0，0，360，128，小一点的文件是正常的，画出来的是0 0 180，128。

 

不知道是不是bug，还是我程序的问题，不过在网上找了个其他人的例子，更改一下文件，也是这样的错误。不过貌似也不会有那么大的做精灵的图片文件。