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103 lines
2.4 KiB
C++
103 lines
2.4 KiB
C++
// This code is in the public domain -- Ignacio Castaño <castano@gmail.com>
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#pragma once
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#ifndef NV_IMAGE_KTXFILE_H
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#define NV_IMAGE_KTXFILE_H
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#include "nvimage.h"
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#include "nvcore/StrLib.h"
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// KTX File format specification:
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// http://www.khronos.org/opengles/sdk/tools/KTX/file_format_spec/#key
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namespace nv
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{
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class Stream;
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// GL types (Table 3.2)
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const uint KTX_UNSIGNED_BYTE;
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const uint KTX_UNSIGNED_SHORT_5_6_5;
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// ...
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// GL formats (Table 3.3)
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// ...
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// GL internal formats (Table 3.12, 3.13)
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// ...
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// GL base internal format. (Table 3.11)
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const uint KTX_RGB;
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const uint KTX_RGBA;
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const uint KTX_ALPHA;
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// ...
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struct KtxHeader {
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uint8 identifier[12];
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uint32 endianness;
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uint32 glType;
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uint32 glTypeSize;
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uint32 glFormat;
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uint32 glInternalFormat;
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uint32 glBaseInternalFormat;
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uint32 pixelWidth;
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uint32 pixelHeight;
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uint32 pixelDepth;
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uint32 numberOfArrayElements;
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uint32 numberOfFaces;
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uint32 numberOfMipmapLevels;
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uint32 bytesOfKeyValueData;
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KtxHeader();
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};
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NVIMAGE_API Stream & operator<< (Stream & s, DDSHeader & header);
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struct KtxFile {
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KtxFile();
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~KtxFile();
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void addKeyValue(const char * key, const char * value);
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private:
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KtxHeader header;
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Array<String> keyArray;
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Array<String> valueArray;
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};
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NVIMAGE_API Stream & operator<< (Stream & s, KtxFile & file);
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/*
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for each keyValuePair that fits in bytesOfKeyValueData
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UInt32 keyAndValueByteSize
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Byte keyAndValue[keyAndValueByteSize]
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Byte valuePadding[3 - ((keyAndValueByteSize + 3) % 4)]
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end
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for each mipmap_level in numberOfMipmapLevels*
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UInt32 imageSize;
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for each array_element in numberOfArrayElements*
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for each face in numberOfFaces
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for each z_slice in pixelDepth*
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for each row or row_of_blocks in pixelHeight*
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for each pixel or block_of_pixels in pixelWidth
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Byte data[format-specific-number-of-bytes]**
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end
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end
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end
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Byte cubePadding[0-3]
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end
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end
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Byte mipPadding[3 - ((imageSize + 3) % 4)]
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end
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*/
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} // nv namespace
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#endif // NV_IMAGE_KTXFILE_H
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