DirectX 9 HLSL与DirectX 10 HLSL：语法相同？ [英] DirectX 9 HLSL vs. DirectX 10 HLSL: syntax the same?

问题描述

过去一个月左右，我一直在努力学习DirectX。所以我一直在DirectX 9和10之间来回混合。我看到的两个主要变化之一是如何处理图形卡中的向量。

我注意到的一个重大变化是如何让GPU识别你的结构。在DirectX 9中，您定义了灵活的顶点格式。

您的典型设置如下：

  #define CUSTOMFVF（D3DFVF_XYZRHW | D3DFVF_DIFFUSE）
  

我相信等效的输入顶点描述：

  D3D10_INPUT_ELEMENT_DESC布局[] = {
 {POSITION，0 ，DXGI_FORMAT_R32G32B32_FLOAT，0，0，
 D3D10_INPUT_PER_VERTEX_DATA，0}，
 {COLOR，0，DXGI_FORMAT_R32G32B32A32_FLOAT，0，12，
 D3D10_INPUT_PER_VERTEX_DATA，0} 
}; 
  

我注意到在DirectX 10它更具描述性。除此之外，什么是一些剧烈的变化，是HLSL语法是一样的？

解决方案

在DX9和DX10（和扩展名DX11）之间的HLSL语法本身没有根本的变化。

Codeka说，更改更多的是清理API和向通用化的道路（为了GPGPU）。但确实存在明显的区别：

显着差异：

• 要将常量传递给着色器，您
  现在必须通过常量缓冲区。


< ：所有类型的
着色器都可以访问同一组
固有函数（有一些例外，例如GS阶段）。整数和逐位操作现在完全符合IEEE标准（而不是通过浮点模拟）。您现在可以访问二进制转换，将int解释为float，float作为uint等。



• 纹理和取样器已解离。现在使用 g_myTexture.Sample（g_mySampler，texCoord）
  而不是 tex2D（g_mySampledTexture，texCoord）




• 缓冲区：一种新型资源，用于访问不需要以随机访问方式进行过滤的数据，使用新的 Object.Load




• 系统价值语义： POSITION的扩展和扩展， DEPTH ， COLOR 语义，现在 SV_Position ， SV_Depth ， SV_Target 并添加每个阶段的新语义如 SV_InstanceID ， SV_VertexId 等。

我现在看到了。如果有新的东西出现，我会更新我的答案。

For the past month or so, I have been busting my behind trying to learn DirectX. So I've been mixing back back and forth between DirectX 9 and 10. One of the major changes I've seen in the two is how to process vectors in the graphics card.

One of the drastic changes I notice is how you get the GPU to recognize your structs. In DirectX 9, you define the Flexible Vertex Formats.

Your typical set up would be like this:

#define CUSTOMFVF (D3DFVF_XYZRHW | D3DFVF_DIFFUSE)

In DirectX 10, I believe the equivalent is the input vertex description:

D3D10_INPUT_ELEMENT_DESC layout[] = {
    {"POSITION",0,DXGI_FORMAT_R32G32B32_FLOAT, 0 , 0,
        D3D10_INPUT_PER_VERTEX_DATA, 0},
    {"COLOR",0,DXGI_FORMAT_R32G32B32A32_FLOAT, 0 , 12,
        D3D10_INPUT_PER_VERTEX_DATA, 0}
};

I notice in DirectX 10 that it is more descriptive. Besides this, what are some of the drastic changes made, and is the HLSL syntax the same for both?

解决方案

I would say there's no radical changes in the HLSL syntax itself between DX9 and DX10 (and by extension DX11).

As codeka said, changes are more a matter of cleaning the API and a road toward generalization (for the sake of GPGPU). But there are indeed noticable differences:

Noticable differences:

• To pass constant to the shaders, you now have to go through Constant Buffers.

• A Common-Shader Core: all types of shader have access to the same set of intrinsic functions (with some exceptions like for GS stage). Integer and bitwise operations are now fully IEEE-compliant (and not emulated via floating point). You have now access to binary casts to interpret an int as a float, a float as an uint etc..

• Textures and Samplers have been dissociated. You now use syntax g_myTexture.Sample( g_mySampler, texCoord ) instead of tex2D( g_mySampledTexture, texCoord )

• Buffers: a new kind of resource for accessing data that need no filtering in a random access way, using the new Object.Load function.

• System-Value Semantics: a generalization and extensions of POSITION, DEPTH, COLOR semantics, that are now SV_Position, SV_Depth, SV_Target and add of per stage new semantics like SV_InstanceID, SV_VertexId, etc.

That's all what I see for now. If something new pops up of my mind I will update my answer.

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