mirror of
https://github.com/godotengine/godot.git
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147 lines
3.3 KiB
C++
147 lines
3.3 KiB
C++
/*
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* Copyright 2015 The Etc2Comp Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include "EtcFile.h"
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#include <stdio.h>
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#include <inttypes.h>
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namespace Etc
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{
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class Image;
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class FileHeader
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{
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public:
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virtual void Write(FILE *a_pfile) = 0;
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File GetFile();
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virtual ~FileHeader(void) {}
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protected:
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File *m_pfile;
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};
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// ----------------------------------------------------------------------------------------------------
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//
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class FileHeader_Pkm : public FileHeader
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{
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public:
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FileHeader_Pkm(File *a_pfile);
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virtual void Write(FILE *a_pfile);
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virtual ~FileHeader_Pkm(void) {}
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private:
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typedef struct
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{
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char m_acMagicNumber[4];
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char m_acVersion[2];
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unsigned char m_ucDataType_msb; // e.g. ETC1_RGB_NO_MIPMAPS
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unsigned char m_ucDataType_lsb;
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unsigned char m_ucExtendedWidth_msb; // padded to 4x4 blocks
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unsigned char m_ucExtendedWidth_lsb;
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unsigned char m_ucExtendedHeight_msb; // padded to 4x4 blocks
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unsigned char m_ucExtendedHeight_lsb;
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unsigned char m_ucOriginalWidth_msb;
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unsigned char m_ucOriginalWidth_lsb;
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unsigned char m_ucOriginalHeight_msb;
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unsigned char m_ucOriginalHeight_lsb;
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} Data;
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Data m_data;
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};
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// ----------------------------------------------------------------------------------------------------
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//
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class FileHeader_Ktx : public FileHeader
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{
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public:
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typedef struct
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{
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uint32_t u32KeyAndValueByteSize;
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} KeyValuePair;
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typedef struct
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{
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uint8_t m_au8Identifier[12];
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uint32_t m_u32Endianness;
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uint32_t m_u32GlType;
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uint32_t m_u32GlTypeSize;
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uint32_t m_u32GlFormat;
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uint32_t m_u32GlInternalFormat;
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uint32_t m_u32GlBaseInternalFormat;
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uint32_t m_u32PixelWidth;
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uint32_t m_u32PixelHeight;
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uint32_t m_u32PixelDepth;
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uint32_t m_u32NumberOfArrayElements;
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uint32_t m_u32NumberOfFaces;
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uint32_t m_u32NumberOfMipmapLevels;
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uint32_t m_u32BytesOfKeyValueData;
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} Data;
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enum class InternalFormat
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{
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ETC1_RGB8 = 0x8D64,
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ETC1_ALPHA8 = ETC1_RGB8,
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//
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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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};
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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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//
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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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FileHeader_Ktx(File *a_pfile);
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virtual void Write(FILE *a_pfile);
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virtual ~FileHeader_Ktx(void) {}
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void AddKeyAndValue(KeyValuePair *a_pkeyvaluepair);
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Data* GetData();
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private:
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Data m_data;
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KeyValuePair *m_pkeyvaluepair;
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uint32_t m_u32Images;
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uint32_t m_u32KeyValuePairs;
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};
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} // namespace Etc
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