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<div class="textblock"><h1 class="doxsection"><a class="anchor" id="autotoc_md36"></a>
Texture Resource (OTEX)</h1>
<p>If the Resource Type is <span class="tt">OTEX</span> (<span class="tt">0x4F544558</span>), the header is immediately followed by the texture definition.</p>
<h2 class="doxsection"><a class="anchor" id="autotoc_md37"></a>
Texture Header</h2>
<table class="markdownTable">
<tr class="markdownTableHead">
<th class="markdownTableHeadLeft">Offset </th><th class="markdownTableHeadLeft">Size </th><th class="markdownTableHeadLeft">Type </th><th class="markdownTableHeadLeft">Description </th></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft">0x40 </td><td class="markdownTableBodyLeft">4 </td><td class="markdownTableBodyLeft">u32 </td><td class="markdownTableBodyLeft">Texture Type ID </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft">0x44 </td><td class="markdownTableBodyLeft">4 </td><td class="markdownTableBodyLeft">u32 </td><td class="markdownTableBodyLeft">Width </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft">0x48 </td><td class="markdownTableBodyLeft">4 </td><td class="markdownTableBodyLeft">u32 </td><td class="markdownTableBodyLeft">Height </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft">0x4C </td><td class="markdownTableBodyLeft">4 </td><td class="markdownTableBodyLeft">u32 </td><td class="markdownTableBodyLeft">Data Size </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft">0x50 </td><td class="markdownTableBodyLeft">... </td><td class="markdownTableBodyLeft">[u8] </td><td class="markdownTableBodyLeft">Raw Texture Data </td></tr>
</table>
<h2 class="doxsection"><a class="anchor" id="autotoc_md38"></a>
Texture Types</h2>
<table class="markdownTable">
<tr class="markdownTableHead">
<th class="markdownTableHeadLeft">ID </th><th class="markdownTableHeadLeft">Name </th><th class="markdownTableHeadLeft">Bits Per Pixel </th><th class="markdownTableHeadLeft">Description </th></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft">0 </td><td class="markdownTableBodyLeft">Error </td><td class="markdownTableBodyLeft">- </td><td class="markdownTableBodyLeft">Invalid / Error </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft">1 </td><td class="markdownTableBodyLeft">RGBA32bpp </td><td class="markdownTableBodyLeft">32 </td><td class="markdownTableBodyLeft">Red, Green, Blue, Alpha (8 bits each) </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft">2 </td><td class="markdownTableBodyLeft">RGBA16bpp </td><td class="markdownTableBodyLeft">16 </td><td class="markdownTableBodyLeft">RGBA 5-5-5-1 </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft">3 </td><td class="markdownTableBodyLeft">Palette4bpp </td><td class="markdownTableBodyLeft">4 </td><td class="markdownTableBodyLeft">4-bit Color Index (CI4) </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft">4 </td><td class="markdownTableBodyLeft">Palette8bpp </td><td class="markdownTableBodyLeft">8 </td><td class="markdownTableBodyLeft">8-bit Color Index (CI8) </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft">5 </td><td class="markdownTableBodyLeft">Grayscale4bpp </td><td class="markdownTableBodyLeft">4 </td><td class="markdownTableBodyLeft">4-bit Intensity (I4) </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft">6 </td><td class="markdownTableBodyLeft">Grayscale8bpp </td><td class="markdownTableBodyLeft">8 </td><td class="markdownTableBodyLeft">8-bit Intensity (I8) </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft">7 </td><td class="markdownTableBodyLeft">GrayscaleAlpha4bpp </td><td class="markdownTableBodyLeft">4 </td><td class="markdownTableBodyLeft">4-bit Intensity with Alpha (IA4) </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft">8 </td><td class="markdownTableBodyLeft">GrayscaleAlpha8bpp </td><td class="markdownTableBodyLeft">8 </td><td class="markdownTableBodyLeft">8-bit Intensity with Alpha (IA8) </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft">9 </td><td class="markdownTableBodyLeft">GrayscaleAlpha16bpp </td><td class="markdownTableBodyLeft">16 </td><td class="markdownTableBodyLeft">16-bit Intensity with Alpha (IA16) </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft">10 </td><td class="markdownTableBodyLeft">GrayscaleAlpha1bpp </td><td class="markdownTableBodyLeft">1 </td><td class="markdownTableBodyLeft">1-bit Black/White (I1) </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft">11 </td><td class="markdownTableBodyLeft">TLUT </td><td class="markdownTableBodyLeft">- </td><td class="markdownTableBodyLeft">Texture Look-Up <a class="el" href="structTable.html">Table</a> (Palette) </td></tr>
</table>
<p><b>Note:</b> When a <span class="tt">TLUT</span> is exported to an OTR file, its type is converted to <span class="tt">RGBA16bpp</span> (ID 2).</p>
<h2 class="doxsection"><a class="anchor" id="autotoc_md39"></a>
YAML Configuration</h2>
<p>When defining textures in the asset configuration, the following format strings are supported:</p>
<table class="markdownTable">
<tr class="markdownTableHead">
<th class="markdownTableHeadLeft">Format String </th><th class="markdownTableHeadLeft">Texture Type </th><th class="markdownTableHeadLeft">Bit Depth </th></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft"><span class="tt">rgba16</span> </td><td class="markdownTableBodyLeft">RGBA16bpp </td><td class="markdownTableBodyLeft">16 </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft"><span class="tt">rgba32</span> </td><td class="markdownTableBodyLeft">RGBA32bpp </td><td class="markdownTableBodyLeft">32 </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft"><span class="tt">ci4</span> </td><td class="markdownTableBodyLeft">Palette4bpp </td><td class="markdownTableBodyLeft">4 </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft"><span class="tt">ci8</span> </td><td class="markdownTableBodyLeft">Palette8bpp </td><td class="markdownTableBodyLeft">8 </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft"><span class="tt">i4</span> </td><td class="markdownTableBodyLeft">Grayscale4bpp </td><td class="markdownTableBodyLeft">4 </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft"><span class="tt">i8</span> </td><td class="markdownTableBodyLeft">Grayscale8bpp </td><td class="markdownTableBodyLeft">8 </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft"><span class="tt">ia1</span> </td><td class="markdownTableBodyLeft">GrayscaleAlpha1bpp </td><td class="markdownTableBodyLeft">1 </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft"><span class="tt">ia4</span> </td><td class="markdownTableBodyLeft">GrayscaleAlpha4bpp </td><td class="markdownTableBodyLeft">4 </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft"><span class="tt">ia8</span> </td><td class="markdownTableBodyLeft">GrayscaleAlpha8bpp </td><td class="markdownTableBodyLeft">8 </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyLeft"><span class="tt">ia16</span> </td><td class="markdownTableBodyLeft">GrayscaleAlpha16bpp </td><td class="markdownTableBodyLeft">16 </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyLeft"><span class="tt">tlut</span> </td><td class="markdownTableBodyLeft">TLUT </td><td class="markdownTableBodyLeft">16 </td></tr>
</table>
<h3 class="doxsection"><a class="anchor" id="autotoc_md40"></a>
Paletted Textures (CI4 / CI8)</h3>
<p>For paletted textures (<span class="tt">ci4</span> or <span class="tt">ci8</span>), you can optionally define the accompanying TLUT within the same entry. If <span class="tt">tlut</span> (offset) and <span class="tt">colors</span> (count) are provided, Torch will automatically generate a separate TLUT asset.</p>
<p>You can also specify <span class="tt">tlut_symbol</span> to explicitly name the generated TLUT asset. If omitted, it defaults to the texture symbol with <span class="tt">_tlut</span> appended.</p>
<p>Example: </p><div class="fragment"><div class="line">- type: TEXTURE</div>
<div class="line"> format: ci8</div>
<div class="line"> width: 32</div>
<div class="line"> height: 32</div>
<div class="line"> offset: 0x12345</div>
<div class="line"> tlut: 0x12545</div>
<div class="line"> colors: 256</div>
<div class="line"> tlut_symbol: my_custom_tlut_name # Optional</div>
</div><!-- fragment --><p> This will create the texture asset and a separate TLUT asset. </p>
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