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<div id="projectname">libktx Reference<span id="projectnumber"> 0.0.0</span>
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<div id="projectbrief">Libraries and tools to create and read KTX image texture files.</div>
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<div class="headertitle"><div class="title">Revision History </div></div>
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<div class="textblock"><p>No longer updated. Kept to preserve ancient history. For more recent history see the repo log at <a href="https://github.com/KhronosGroup/KTX-Software">https://github.com/KhronosGroup/KTX-Software</a>. See also the Release Notes in the repo.</p>
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<h1 class="doxsection"><a class="anchor" id="v8"></a>
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Version 4.0</h1>
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<p>Added: </p><ul>
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<li>Support for KTX Version 2. </li>
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<li>Support for encoding and transcoding Basis Universal images in KTX Version 2 files. </li>
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<li>Function to print info about a KTX file.</li>
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</ul>
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<h1 class="doxsection"><a class="anchor" id="v7"></a>
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Version 3.0.1</h1>
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<p>Fixed: </p><ul>
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<li>GitHub issue #159: compile failure with recent Vulkan SDKs. </li>
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<li>Incorrect mapping of GL DXT3 and DXT5 formats to Vulkan equivalents. </li>
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<li>Incorrect BC4 blocksize. </li>
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<li>Missing mapping of PVRTC formats from GL to Vulkan. </li>
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<li>Incorrect block width and height calculations for sizes that are not a multiple of the block size. </li>
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<li>Incorrect KTXorientation key in test images.</li>
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</ul>
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<h1 class="doxsection"><a class="anchor" id="v6"></a>
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Version 3.0</h1>
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<p>Added: </p><ul>
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<li>new <a class="el" href="structktxTexture.html" title="Base class representing a texture.">ktxTexture</a> object based API for reading KTX files without an OpenGL context. </li>
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<li>Vulkan loader. #include <ktxvulkan.h> to use it.</li>
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</ul>
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<p>Changed: </p><ul>
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<li><a class="el" href="ktx_8h.html" title="Declares the public functions and structures of the KTX API.">ktx.h</a> to not depend on KHR/khrplatform.h and GL{,ES*}/gl{corearb,}.h. Applications using OpenGL must now include these files themselves. </li>
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<li>ktxLoadTexture[FMN], removing the hack of loading 1D textures as 2D textures when the OpenGL context does not support 1D textures. KTX_UNSUPPORTED_TEXTURE_TYPE is now returned.</li>
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</ul>
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<h1 class="doxsection"><a class="anchor" id="v5"></a>
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Version 2.0.2</h1>
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<p>Added: </p><ul>
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<li>Support for cubemap arrays.</li>
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</ul>
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<p>Changed: </p><ul>
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<li>New build system</li>
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</ul>
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<p>Fixed: </p><ul>
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<li>GitHub issue #40: failure to byte-swap key-value lengths. </li>
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<li>GitHub issue #33: returning incorrect target when loading cubemaps. </li>
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<li>GitHub PR #42: loading of texture arrays. </li>
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<li>GitHub PR #41: compilation error when KTX_OPENGL_ES2=1 defined. </li>
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<li>GitHub issue #39: stack-buffer-overflow in toktx </li>
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<li>Don't use GL_EXTENSIONS on recent OpenGL versions.</li>
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</ul>
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<h1 class="doxsection"><a class="anchor" id="v4"></a>
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Version 2.0.1</h1>
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<p>Added: </p><ul>
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<li>CMake build files. Thanks to Pavel Rotjberg for the initial version.</li>
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</ul>
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<p>Changed: </p><ul>
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<li>ktxWriteKTXF to check the validity of the type & format combinations passed to it.</li>
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</ul>
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<p>Fixed: </p><ul>
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<li>Public Bugzilla <a href="http://www.khronos.org/bugzilla/show_bug.cgi?id=999">999</a>: 16-bit luminance texture cannot be written. </li>
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<li>compile warnings from compilers stricter than MS Visual C++. Thanks to Pavel Rotjberg.</li>
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</ul>
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<h1 class="doxsection"><a class="anchor" id="v3"></a>
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Version 2.0</h1>
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<p>Added: </p><ul>
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<li>support for decoding ETC2 and EAC formats in the absence of a hardware decoder. </li>
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<li>support for converting textures with legacy LUMINANCE, LUMINANCE_ALPHA, etc. formats to the equivalent R, RG, etc. format with an appropriate swizzle, when loading in OpenGL Core Profile contexts. </li>
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<li>ktxErrorString function to return a string corresponding to an error code. </li>
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<li>tests for ktxLoadTexture[FN] that run under OpenGL ES 3.0 and OpenGL 3.3. The latter includes an EGL on WGL wrapper that makes porting apps between OpenGL ES and OpenGL easier on Windows. </li>
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<li>more texture formats to ktxLoadTexture[FN] and toktx tests.</li>
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</ul>
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<p>Changed: </p><ul>
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<li>ktxLoadTexture[FMN] to discover the capabilities of the GL context at run time and load textures, or not, according to those capabilities.</li>
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</ul>
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<p>Fixed: </p><ul>
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<li>failure of ktxWriteKTXF to pad image rows to 4 bytes as required by the KTX format. </li>
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<li>ktxWriteKTXF exiting with KTX_FILE_WRITE_ERROR when attempting to write more than 1 byte of face-LOD padding.</li>
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</ul>
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<p>Although there is only a very minor API change, the addition of ktxErrorString, the functional changes are large enough to justify bumping the major revision number.</p>
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<h1 class="doxsection"><a class="anchor" id="v2"></a>
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Version 1.0.1</h1>
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<p>Implemented ktxLoadTextureM. Fixed the following: </p><ul>
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<li>Public Bugzilla <a href="http://www.khronos.org/bugzilla/show_bug.cgi?id=571">571</a>: crash when null passed for pIsMipmapped. </li>
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<li>Public Bugzilla <a href="http://www.khronos.org/bugzilla/show_bug.cgi?id=572">572</a>: memory leak when unpacking ETC textures. </li>
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<li>Public Bugzilla <a href="http://www.khronos.org/bugzilla/show_bug.cgi?id=573">573</a>: potential crash when unpacking ETC textures with unused padding pixels. </li>
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<li>Public Bugzilla <a href="http://www.khronos.org/bugzilla/show_bug.cgi?id=576">576</a>: various small fixes.</li>
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</ul>
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<p>Thanks to Krystian Bigaj for the ktxLoadTextureM implementation and these fixes.</p>
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<h1 class="doxsection"><a class="anchor" id="v1"></a>
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Version 1.0</h1>
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<p>Initial release. </p>
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