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- /*
- * Copyright 2015 The Etc2Comp Authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- #include "EtcFileHeader.h"
- #include "EtcBlock4x4EncodingBits.h"
- #include <assert.h>
- namespace Etc
- {
- // ----------------------------------------------------------------------------------------------------
- //
- FileHeader_Pkm::FileHeader_Pkm(File *a_pfile)
- {
- m_pfile = a_pfile;
- static const char s_acMagicNumberData[4] = { 'P', 'K', 'M', ' ' };
- static const char s_acVersionData[2] = { '1', '0' };
- for (unsigned int ui = 0; ui < sizeof(s_acMagicNumberData); ui++)
- {
- m_data.m_acMagicNumber[ui] = s_acMagicNumberData[ui];
- }
- for (unsigned int ui = 0; ui < sizeof(s_acVersionData); ui++)
- {
- m_data.m_acVersion[ui] = s_acVersionData[ui];
- }
- m_data.m_ucDataType_msb = 0; // ETC1_RGB_NO_MIPMAPS
- m_data.m_ucDataType_lsb = 0;
- m_data.m_ucOriginalWidth_msb = (unsigned char)(m_pfile->GetSourceWidth() >> 8);
- m_data.m_ucOriginalWidth_lsb = m_pfile->GetSourceWidth() & 0xFF;
- m_data.m_ucOriginalHeight_msb = (unsigned char)(m_pfile->GetSourceHeight() >> 8);
- m_data.m_ucOriginalHeight_lsb = m_pfile->GetSourceHeight() & 0xFF;
- m_data.m_ucExtendedWidth_msb = (unsigned char)(m_pfile->GetExtendedWidth() >> 8);
- m_data.m_ucExtendedWidth_lsb = m_pfile->GetExtendedWidth() & 0xFF;
- m_data.m_ucExtendedHeight_msb = (unsigned char)(m_pfile->GetExtendedHeight() >> 8);
- m_data.m_ucExtendedHeight_lsb = m_pfile->GetExtendedHeight() & 0xFF;
- }
- // ----------------------------------------------------------------------------------------------------
- //
- void FileHeader_Pkm::Write(FILE *a_pfile)
- {
- fwrite(&m_data, sizeof(Data), 1, a_pfile);
- }
- // ----------------------------------------------------------------------------------------------------
- //
- FileHeader_Ktx::FileHeader_Ktx(File *a_pfile)
- {
- m_pfile = a_pfile;
- static const uint8_t s_au8Itentfier[12] =
- {
- 0xAB, 0x4B, 0x54, 0x58, // first four bytes of Byte[12] identifier
- 0x20, 0x31, 0x31, 0xBB, // next four bytes of Byte[12] identifier
- 0x0D, 0x0A, 0x1A, 0x0A // final four bytes of Byte[12] identifier
- };
- for (unsigned int ui = 0; ui < sizeof(s_au8Itentfier); ui++)
- {
- m_data.m_au8Identifier[ui] = s_au8Itentfier[ui];
- }
- m_data.m_u32Endianness = 0x04030201;
- m_data.m_u32GlType = 0;
- m_data.m_u32GlTypeSize = 1;
- m_data.m_u32GlFormat = 0;
- switch (m_pfile->GetImageFormat())
- {
- case Image::Format::RGB8:
- case Image::Format::SRGB8:
- m_data.m_u32GlInternalFormat = (unsigned int)InternalFormat::ETC2_RGB8;
- m_data.m_u32GlBaseInternalFormat = (unsigned int)BaseInternalFormat::ETC2_RGB8;
- break;
- case Image::Format::RGBA8:
- case Image::Format::SRGBA8:
- m_data.m_u32GlInternalFormat = (unsigned int)InternalFormat::ETC2_RGBA8;
- m_data.m_u32GlBaseInternalFormat = (unsigned int)BaseInternalFormat::ETC2_RGBA8;
- break;
- case Image::Format::RGB8A1:
- case Image::Format::SRGB8A1:
- m_data.m_u32GlInternalFormat = (unsigned int)InternalFormat::ETC2_RGB8A1;
- m_data.m_u32GlBaseInternalFormat = (unsigned int)BaseInternalFormat::ETC2_RGB8A1;
- break;
-
- case Image::Format::R11:
- m_data.m_u32GlInternalFormat = (unsigned int)InternalFormat::ETC2_R11;
- m_data.m_u32GlBaseInternalFormat = (unsigned int)BaseInternalFormat::ETC2_R11;
- break;
- case Image::Format::SIGNED_R11:
- m_data.m_u32GlInternalFormat = (unsigned int)InternalFormat::ETC2_SIGNED_R11;
- m_data.m_u32GlBaseInternalFormat = (unsigned int)BaseInternalFormat::ETC2_R11;
- break;
-
- case Image::Format::RG11:
- m_data.m_u32GlInternalFormat = (unsigned int)InternalFormat::ETC2_RG11;
- m_data.m_u32GlBaseInternalFormat = (unsigned int)BaseInternalFormat::ETC2_RG11;
- break;
- case Image::Format::SIGNED_RG11:
- m_data.m_u32GlInternalFormat = (unsigned int)InternalFormat::ETC2_SIGNED_RG11;
- m_data.m_u32GlBaseInternalFormat = (unsigned int)BaseInternalFormat::ETC2_RG11;
- break;
- default:
- m_data.m_u32GlInternalFormat = (unsigned int)InternalFormat::ETC1_RGB8;
- m_data.m_u32GlBaseInternalFormat = (unsigned int)BaseInternalFormat::ETC1_RGB8;
- break;
- }
- m_data.m_u32PixelWidth = 0;
- m_data.m_u32PixelHeight = 0;
- m_data.m_u32PixelDepth = 0;
- m_data.m_u32NumberOfArrayElements = 0;
- m_data.m_u32NumberOfFaces = 0;
- m_data.m_u32BytesOfKeyValueData = 0;
- m_pkeyvaluepair = nullptr;
- m_u32Images = 0;
- m_u32KeyValuePairs = 0;
- m_data.m_u32PixelWidth = m_pfile->GetSourceWidth();
- m_data.m_u32PixelHeight = m_pfile->GetSourceHeight();
- m_data.m_u32PixelDepth = 0;
- m_data.m_u32NumberOfArrayElements = 0;
- m_data.m_u32NumberOfFaces = 1;
- m_data.m_u32NumberOfMipmapLevels = m_pfile->GetNumMipmaps();
- }
- // ----------------------------------------------------------------------------------------------------
- //
- void FileHeader_Ktx::Write(FILE *a_pfile)
- {
- size_t szBytesWritten;
- // Write header
- szBytesWritten = fwrite(&m_data, 1, sizeof(Data), a_pfile);
- assert(szBytesWritten == sizeof(Data));
- // Write KeyAndValuePairs
- if (m_u32KeyValuePairs)
- {
- fwrite(m_pkeyvaluepair, m_pkeyvaluepair->u32KeyAndValueByteSize, 1, a_pfile);
- }
- }
- // ----------------------------------------------------------------------------------------------------
- //
- FileHeader_Ktx::Data *FileHeader_Ktx::GetData()
- {
- return &m_data;
- }
- // ----------------------------------------------------------------------------------------------------
- //
- } // namespace Etc
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