资源.htm

此文件是微软MSDN中d3d部分资料的翻译文件

  style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l5 level1 lfo1; tab-stops: list 36.0pt"><U><SPAN 
  lang=EN-US 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN"><A 
  href="http://www.gesoftfactory.com/developer/Resources.htm#由应用程序管理的资源及分配策略">由应用程序管理的资源及分配策略</A></SPAN></U><SPAN 
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<P class=MsoNormal 
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 1"><A 
name=资源属性><B><SPAN 
style="FONT-SIZE: 24pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 18.0pt; mso-fareast-language: ZH-CN">资源属性<SPAN 
lang=EN-US><o:p></o:p></SPAN></SPAN></B></A></P><SPAN 
style="mso-bookmark: 资源属性"></SPAN>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><SPAN lang=EN-US 
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<P class=MsoNormal 
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style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">所有资源共享以下属性。<SPAN 
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<UL type=disc>
  <LI class=MsoNormal 
  style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l3 level1 lfo2; tab-stops: list 36.0pt"><I><SPAN 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">用途</SPAN></I><SPAN 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">。资源的用法，例如，作为纹理还是作为渲染目标。<SPAN 
  lang=EN-US><o:p></o:p></SPAN></SPAN> 
  <LI class=MsoNormal 
  style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l3 level1 lfo2; tab-stops: list 36.0pt"><I><SPAN 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">格式</SPAN></I><SPAN 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">。数据的格式，例如，二维表面的像素格式。<SPAN 
  lang=EN-US><o:p></o:p></SPAN></SPAN> 
  <LI class=MsoNormal 
  style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l3 level1 lfo2; tab-stops: list 36.0pt"><I><SPAN 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">池（<SPAN 
  lang=EN-US>Pool）</SPAN></SPAN></I><SPAN 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">。分配资源的内存类型。<SPAN 
  lang=EN-US><o:p></o:p></SPAN></SPAN> 
  <LI class=MsoNormal 
  style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l3 level1 lfo2; tab-stops: list 36.0pt"><I><SPAN 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">类型</SPAN></I><SPAN 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">。资源的类型，例如，顶点缓存或渲染目标。<SPAN 
  lang=EN-US><o:p></o:p></SPAN></SPAN> </LI></UL>
<P class=MsoNormal 
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style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">对资源的使用是强制的。若应用程序要将资源用于某一操作，则必须在资源创建时说明该操作。关于为资源定义的用途常数表，请参阅<U><SPAN 
lang=EN-US>D3DUSAGE</SPAN></U>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal 
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><I><SPAN 
lang=EN-US 
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">D3DUSAGE_RTPATCHES</SPAN></I><SPAN 
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">，<I><SPAN 
lang=EN-US>D3DUSAGE_NPATCHES</SPAN></I>和<I><SPAN 
lang=EN-US>D3DUSAGE_POINTS</SPAN></I>常数告诉驱动程序这些缓存将分别被用于<SPAN 
lang=EN-US>triangular patchs，grid 
patchs，N-patchs，或点精灵。提供这些标志是为了以防万一硬件不使用主机处理就无法执行这些操作，因此驱动程序希望把这些表面分配在系统内存中，让CPU可以访问它们。如果驱动程序可以完全用硬件执行这些操作，那么它可以将这些表面分配在加速图形接口（AGP）内存中，这样既避免了在主机保存一份复本，又提高了性能，一举两得。注意这些标志提供的信息并不是绝对必需的。驱动程序可以检测正在对数据执行这类操作，并在随后几帧把缓存移回系统内存。<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal 
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><SPAN 
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">有关用途标志及它们与特定资源如何关联的细节，请参阅每个资源创建方法的参考页。<SPAN 
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal 
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><SPAN 
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">有关资源的表面格式的信息，请参阅<U><SPAN 
lang=EN-US>D3DFORMAT</SPAN></U>枚举类型。<SPAN 
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal 
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style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">存放资源缓存的那种内存被称为池。池的值由<U><SPAN 
lang=EN-US>D3DPOOL</SPAN></U>枚举类型定义。对于单个资源包含的不同对象</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-fareast-language: ZH-CN; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">（</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">也就是说，<SPAN 
lang=EN-US>mipmap中的mip 
levels），池不能混合，并且一旦为某资源选择了池，池就不能再被改变了。<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal 
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style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">资源类型是在运行的时候，当应用程序调用诸如<U><SPAN 
lang=EN-US>IDirect3DDevice9::CreateCubeTexture</SPAN></U>之类的资源创建方法时隐式设置的。资源类型由<U><SPAN 
lang=EN-US>D3DRESOURCETYPE</SPAN></U>枚举类型定义。应用程序可以在运行的时候查询这些类型，但是，最好大多数场景都无需进行运行时类型检查。<SPAN 
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><SPAN lang=EN-US 
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">
<HR align=center width="100%" SIZE=1>
</SPAN></DIV>
<P class=MsoNormal 
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 1"><A 
name=操控资源><B><SPAN 
style="FONT-SIZE: 24pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 18.0pt; mso-fareast-language: ZH-CN">操控资源<SPAN 
lang=EN-US><o:p></o:p></SPAN></SPAN></B></A></P><SPAN 
style="mso-bookmark: 操控资源"></SPAN>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><SPAN lang=EN-US 
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">
<HR align=center width="100%" SIZE=1>
</SPAN></DIV>
<P class=MsoNormal 
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><SPAN 
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">为了渲染场景，应用程序需要操控资源。首先，应用程序用以下方法创建纹理资源。<SPAN 
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<UL type=disc>
  <LI class=MsoNormal 
  style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo3; tab-stops: list 36.0pt"><U><SPAN 
  lang=EN-US 
  style="COLOR: blue; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">IDirect3DDevice9::CreateCubeTexture</SPAN></U><SPAN 
  lang=EN-US 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN"> 
  <o:p></o:p></SPAN>
  <LI class=MsoNormal 
  style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo3; tab-stops: list 36.0pt"><U><SPAN 
  lang=EN-US 
  style="COLOR: blue; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">IDirect3DDevice9::CreateTexture</SPAN></U><SPAN 
  lang=EN-US 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN"> 
  <o:p></o:p></SPAN>
  <LI class=MsoNormal 
  style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo3; tab-stops: list 36.0pt"><U><SPAN 
  lang=EN-US 
  style="COLOR: blue; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">IDirect3DDevice9::CreateVolumeTexture</SPAN></U><SPAN 
  lang=EN-US 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN"><o:p></o:p></SPAN> 
  </LI></UL>
<P class=MsoNormal 
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style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">由纹理创建方法返回的纹理对象是表面或立体纹理的容器，这些容器一般被称为缓存。资源拥有的缓存在继承资源的用途、格式和池的同时也有自己的类型。更多信息请参阅<U>资源属性</U>。<SPAN 
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal 
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><SPAN 
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">为了载入图片，应用程序应该调用以下方法，得到对所包含的表面的访问权。更多细节请参阅<U>锁定资源</U>。<SPAN 
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<UL type=disc>
  <LI class=MsoNormal 
  style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l1 level1 lfo4; tab-stops: list 36.0pt"><U><SPAN 
  lang=EN-US 
  style="COLOR: blue; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">IDirect3DCubeTexture9::LockRect</SPAN></U><SPAN 
  lang=EN-US 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN"> 
  <o:p></o:p></SPAN>
  <LI class=MsoNormal 
  style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l1 level1 lfo4; tab-stops: list 36.0pt"><U><SPAN 
  lang=EN-US 
  style="COLOR: blue; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">IDirect3DTexture9::LockRect</SPAN></U><SPAN 
  lang=EN-US 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN"> 
  <o:p></o:p></SPAN>
  <LI class=MsoNormal 
  style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l1 level1 lfo4; tab-stops: list 36.0pt"><U><SPAN 
  lang=EN-US 
  style="COLOR: blue; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">IDirect3DVolumeTexture9::LockBox</SPAN></U><SPAN 
  lang=EN-US 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN"><o:p></o:p></SPAN> 
  </LI></UL>
<P class=MsoNormal 
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style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">lock方法接收的参数指出了所包含的表面——例如，纹理的mipmap 
sub-level或立方体纹理的表面——并返回指向像素的指针。一般的应用程序从不直接使用表面对象。<o:p></o:p></SPAN></P>
<P class=MsoNormal 
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><SPAN 
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">另外，应用程序用以下方法创建面向几何体的资源。<SPAN 
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<UL type=disc>
  <LI class=MsoNormal 
  style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l4 level1 lfo5; tab-stops: list 36.0pt"><U><SPAN 
  lang=EN-US 
  style="COLOR: blue; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">IDirect3DDevice9::CreateIndexBuffer</SPAN></U><SPAN 
  lang=EN-US 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN"> 
  <o:p></o:p></SPAN>
  <LI class=MsoNormal 
  style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l4 level1 lfo5; tab-stops: list 36.0pt"><U><SPAN 
  lang=EN-US 
  style="COLOR: blue; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">IDirect3DDevice9::CreateVertexBuffer</SPAN></U><SPAN 
  lang=EN-US 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN"><o:p></o:p></SPAN> 
  </LI></UL>
<P class=MsoNormal 
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><SPAN 
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">应用程序通过调用以下方法锁定并填充缓存资源。<SPAN 
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<UL type=disc>
  <LI class=MsoNormal 
  style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l6 level1 lfo6; tab-stops: list 36.0pt"><U><SPAN 
  lang=EN-US 
  style="COLOR: blue; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">IDirect3DIndexBuffer9::Lock</SPAN></U><SPAN 
  lang=EN-US 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN"> 
  <o:p></o:p></SPAN>
  <LI class=MsoNormal 
  style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l6 level1 lfo6; tab-stops: list 36.0pt"><U><SPAN 
  lang=EN-US 
  style="COLOR: blue; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">IDirect3DVertexBuffer9::Lock</SPAN></U><SPAN 
  lang=EN-US 
  style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN"><o:p></o:p></SPAN>