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| − | ''This article is about the [[Struct (RW Section)|Struct]] section accompanied by a [[Texture Native (RW Section)|Texture Native]] parent section.''
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| − | The '''Texture Native Struct''' section can usually be found in [[texture archive]]s used by the PC and XBOX versions of the GTA III game trilogy. They are the most important sections inside a <source>.txd</source> file since they contain the names, dimensions and the actual image data for textures. The typical location in the file's section hierarchy is ''[[Texture Dictionary (RW Section)|Texture Dictionary]] > [[Texture Native (RW Section)|Texture Native]] > Struct''.
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| − | ==Header==
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| − | There is a ''88 byte'' header with general image information:
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| − | 4b - DWORD - Platform ID
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| − | 4b - DWORD - Filter Flags
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| − | 32b - CHAR[32] - Diffuse Texture Name (null-terminated string)
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| − | 32b - CHAR[32] - Alpha Texture Name (null-terminated string)
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| − | 4b - DWORD - Image Flags
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| − | 4b - DWORD - Is alpha used? (0: no, 1: yes); Platform 9 uses DXT* codes here
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| − | 2b - WORD - Image Width
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| − | 2b - WORD - Image Height
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| − | 1b - BYTE - Bit Depth
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| − | 1b - BYTE - Mipmap Count
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| − | 1b - BYTE - unknown, always 4
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| − | 1b - BYTE - Compression Type
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| − | ;Platform ID: This is 8 for GTA3 and VC on the PC, 9 for GTA SA on the PC, and 5 for GTA3/VC/SA on the XBOX.
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| − | ;Filter Flags: ''- todo -''
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| − | ;Image Flags: ''- todo -''
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| − | // 512 = 16bpp no alpha
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| − | // 768 = 16bpp with alpha
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| − | // 9728= 8bpp no alpha
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| − | // 9472= 8bpp with alpha
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| − | // 1536= 32bpp no alpha < -+- SET IF ANY XBOX
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| − | // 1280= 32bpp with alpha < /
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| − | // 512? = dxt1 no alpha
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| − | // 768 = dxt3 with alpha
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| − | // ? = dxt3 no alpha
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| − | // 256 = used in generic.txd (first of 2 duplicates in img file)
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| − | // and in hud.txd too
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| − | // 6 = was used for body in ashdexx's sample
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| − | // custom xbox working txd
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| − | ;Bit Depth: 8, 16 or 32; 8 comes with palette
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| − | ;Compression Type: ''- todo -''
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| − | ==Image Data==
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| − | The header is followed by image data.
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| − | ''- todo (size, palette, pixels, mipmaps) -''
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| − | ===8 bit per pixel===
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| − | The 8 bit textures make use of a ''color palette'', so they only support up to 256 different colors. The one byte for each pixel is an index into the palette.
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| − | 1024 byte - BYTE[256][4] - palette of RGBA colors
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| − | 4 byte - DWORD - size of pixel data
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| − | w*h*1 byte - BYTE[w*h] - pixels, 1 byte each
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| − | ===16 bit per pixel===
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| − | ''- todo -''
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| − | ===32 bit per pixel===
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| − | 4 byte - DWORD - size of pixel data
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| − | w*h*4 byte - BYTE[w*h][4] - pixels, 4 byte each (BGRA colors!)
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| − | ===DXT compressed===
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| − | ''- todo (mipmaps!) -''
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| − | {{File-stub}}
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