mirror of https://github.com/axmolengine/axmol.git
85 lines
2.9 KiB
C
85 lines
2.9 KiB
C
/****************************************************************************
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Copyright (c) 2022 Bytedance Inc.
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https://axmolengine.github.io/
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#pragma once
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#include <stdint.h>
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#define KTX_V1_HEADER_SIZE 64
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#define KTX_V1_MAGIC "KTX 11"
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// ktxv1 header, refer to: https://www.khronos.org/registry/KTX/specs/1.0/ktxspec_v1.html
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struct KTXv1Header
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{
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struct InternalFormat
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{
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enum
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{
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// ETC1
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ETC1_RGB8 = 0x8D64,
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ETC1_ALPHA8 = ETC1_RGB8,
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// ETC2
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ETC2_R11 = 0x9270,
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ETC2_SIGNED_R11 = 0x9271,
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ETC2_RG11 = 0x9272,
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ETC2_SIGNED_RG11 = 0x9273,
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ETC2_RGB8 = 0x9274,
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ETC2_SRGB8 = 0x9275,
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ETC2_RGB8A1 = 0x9276,
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ETC2_SRGB8_PUNCHTHROUGH_ALPHA1 = 0x9277,
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ETC2_RGBA8 = 0x9278,
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// ATITC
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ATC_RGB_AMD = 0x8C92,
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ATC_RGBA_EXPLICIT_ALPHA_AMD = 0x8C93,
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ATC_RGBA_INTERPOLATED_ALPHA_AMD = 0x87EE,
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};
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};
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// enum class BaseInternalFormat
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//{
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// ETC2_R11 = 0x1903,
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// ETC2_RG11 = 0x8227,
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// ETC1_RGB8 = 0x1907,
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// ETC1_ALPHA8 = ETC1_RGB8,
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// ETC2_RGB8 = 0x1907,
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// ETC2_RGB8A1 = 0x1908,
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// ETC2_RGBA8 = 0x1908,
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//};
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uint8_t identifier[12];
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uint32_t endianness;
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uint32_t glType;
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uint32_t glTypeSize;
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uint32_t glFormat;
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uint32_t glInternalFormat;
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uint32_t glBaseInternalFormat;
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uint32_t pixelWidth;
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uint32_t pixelHeight;
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uint32_t pixelDepth;
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uint32_t numberOfArrayElements;
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uint32_t numberOfFaces;
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uint32_t numberOfMipmapLevels;
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uint32_t bytesOfKeyValueData;
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};
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