Shader Program Buffer: Difference between revisions
Further PS3 info.
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(Further PS3 info.) |
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The shader program buffer, as the name suggests, describes a buffer for compiled shaders. Shaders are platform-specific and their formats vary greatly, and differences between pixel shaders and vertex shaders double this diversity. This makes documenting the formats extremely challenging; as such, although attempts have been made to do so, they will most likely remain undocumented on this wiki. Some basic information is provided below.
PlayStation 3 uses shaders compiled with NVIDIA's Cg compiler. The primary resource portion has a discernible header, but for the most part it is made up of the the _CGprogram structure, which is unfortunately not publicly documented and does not appear in any symbols. The secondary resource portion (present only in pixel shaders) is usually null, though it can sometimes contain garbage near the end. These do vary in size, however, indicating they are valid resources and get loaded into memory. See [https://developer.nvidia.com/cg-toolkit-download NVIDIA's reference manual] or the SCE PS3 SDK for more information.
For information on Xbox 360 and PC shaders, see Microsoft's documentation of [https://learn.microsoft.com/en-us/windows/win32/direct3dhlsl/dx9-graphics-reference-asm-ps-3-0 ps_3_0] and [https://learn.microsoft.com/en-us/windows/win32/direct3dhlsl/dx9-graphics-reference-asm-vs-3-0 vs_3_0]. Note that PC shaders are compiled at runtime from source code contained in [[Shader Technique]] resources using Microsoft HLSL 9.2; they are cached in <code>%LOCALAPPDATA%/Criterion Games/Burnout Paradise/ShaderCache</code>.
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