diff options
Diffstat (limited to 'DevIL/src-IL/src/il_ktx.cpp')
| -rw-r--r-- | DevIL/src-IL/src/il_ktx.cpp | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/DevIL/src-IL/src/il_ktx.cpp b/DevIL/src-IL/src/il_ktx.cpp new file mode 100644 index 00000000..407ebb16 --- /dev/null +++ b/DevIL/src-IL/src/il_ktx.cpp @@ -0,0 +1,271 @@ +//----------------------------------------------------------------------------- +// +// ImageLib Sources +// Copyright (C) 2000-2016 by Denton Woods +// Last modified: 05/15/2016 +// +// Filename: src-IL/src/il_ktx.c +// +// Description: Reads a Khronos Texture .ktx file +// +//----------------------------------------------------------------------------- + + +#include "il_internal.h" +#ifndef IL_NO_KTX +#include "il_bits.h" + + +ILboolean iIsValidKtx(void); +ILboolean iLoadKtxInternal(); + + +#ifdef _MSC_VER +#pragma pack(push, packed_struct, 1) +#endif +typedef struct KTX_HEAD +{ + ILubyte identifier[12]; + ILuint endianness; + ILuint glType; + ILuint glTypeSize; + ILuint glFormat; + ILuint glInternalFormat; + ILuint glBaseInternalFormat; + ILuint pixelWidth; + ILuint pixelHeight; + ILuint pixelDepth; + ILuint numberOfArrayElements; + ILuint numberOfFaces; + ILuint numberOfMipmapLevels; + ILuint bytesOfKeyValueData; +} IL_PACKSTRUCT KTX_HEAD; +#ifdef _MSC_VER +#pragma pack(pop, packed_struct) +#endif + + +// From GL/GL.h +#define I_GL_BYTE 0x1400 +#define I_GL_UNSIGNED_BYTE 0x1401 +#define I_GL_SHORT 0x1402 +#define I_GL_UNSIGNED_SHORT 0x1403 +#define I_GL_INT 0x1404 +#define I_GL_UNSIGNED_INT 0x1405 +#define I_GL_FLOAT 0x1406 +//#define I_GL_2_BYTES 0x1407 +//#define I_GL_3_BYTES 0x1408 +//#define I_GL_4_BYTES 0x1409 +#define I_GL_DOUBLE 0x140A +#define I_GL_ALPHA 0x1906 +#define I_GL_RGB 0x1907 +#define I_GL_RGBA 0x1908 +#define I_GL_LUMINANCE 0x1909 +#define I_GL_LUMINANCE_ALPHA 0x190A + + + +ILboolean ilIsValidKtx(ILconst_string FileName) +{ + ILHANDLE KtxFile; + ILboolean bKtx = IL_FALSE; + + if (!iCheckExtension(FileName, IL_TEXT("ktx"))) { + ilSetError(IL_INVALID_EXTENSION); + return bKtx; + } + + KtxFile = iopenr(FileName); + if (KtxFile == NULL) { + ilSetError(IL_COULD_NOT_OPEN_FILE); + return bKtx; + } + + bKtx = ilIsValidKtxF(KtxFile); + icloser(KtxFile); + + return bKtx; +} + + +ILboolean ilIsValidKtxF(ILHANDLE File) +{ + ILuint FirstPos; + ILboolean bRet; + + iSetInputFile(File); + FirstPos = itell(); + bRet = iIsValidKtx(); + iseek(FirstPos, IL_SEEK_SET); + + return bRet; +} + + +ILboolean ilIsValidKtxL(const void *Lump, ILuint Size) +{ + iSetInputLump(Lump, Size); + return iIsValidKtx(); +} + + +ILboolean iIsValidKtx() +{ + ILubyte Signature[8]; + ILint Read; + + /*Read = iread(Signature, 1, 8); + iseek(-Read, IL_SEEK_CUR);*/ + + return IL_FALSE; +} + + +//! Reads a .ktx file +ILboolean ilLoadKtx(ILconst_string FileName) +{ + ILHANDLE KtxFile; + ILboolean bKtx = IL_FALSE; + + KtxFile = iopenr(FileName); + if (KtxFile == NULL) { + ilSetError(IL_COULD_NOT_OPEN_FILE); + return bKtx; + } + + bKtx = ilLoadKtxF(KtxFile); + icloser(KtxFile); + + return bKtx; +} + + +//! Reads an already-opened .ktx file +ILboolean ilLoadKtxF(ILHANDLE File) +{ + ILuint FirstPos; + ILboolean bRet; + + iSetInputFile(File); + FirstPos = itell(); + bRet = iLoadKtxInternal(); + iseek(FirstPos, IL_SEEK_SET); + + return bRet; +} + + +//! Reads from a memory "lump" that contains a .ktx +ILboolean ilLoadKtxL(const void *Lump, ILuint Size) +{ + iSetInputLump(Lump, Size); + return iLoadKtxInternal(); +} + + +// Note: .Ktx support has not been tested yet! +// https://www.khronos.org/opengles/sdk/tools/KTX/file_format_spec/ +ILboolean iLoadKtxInternal() +{ + KTX_HEAD Header; + ILuint imageSize; + ILenum Format; + ILubyte Bpp; + ILubyte FileIdentifier[12] = { + //0xAB, 0x4B, 0x54, 0x58, 0x20, 0x31, 0x31, 0xBB, 0x0D, 0x0A, 0x1A, 0x0A + '«', 'K', 'T', 'X', ' ', '1', '1', '»', '\r', '\n', '\x1A', '\n' + }; + + if (iCurImage == NULL) { + ilSetError(IL_ILLEGAL_OPERATION); + return IL_FALSE; + } + + /*Header.Width = GetLittleShort(); + Header.Height = GetLittleShort(); + Header.Dummy = GetLittleInt();*/ + + if (iread(Header.identifier, 1, 12) != 12) + return IL_FALSE; + Header.endianness = GetLittleUInt(); + Header.glType = GetLittleUInt(); + Header.glTypeSize = GetLittleUInt(); + Header.glFormat = GetLittleUInt(); + Header.glInternalFormat = GetLittleUInt(); + Header.glBaseInternalFormat = GetLittleUInt(); + Header.pixelWidth = GetLittleUInt(); + Header.pixelHeight = GetLittleUInt(); + Header.pixelDepth = GetLittleUInt(); + Header.numberOfArrayElements = GetLittleUInt(); + Header.numberOfFaces = GetLittleUInt(); + Header.numberOfMipmapLevels = GetLittleUInt(); + Header.bytesOfKeyValueData = GetLittleUInt(); + + + if (memcmp(Header.identifier, FileIdentifier, 12) || Header.endianness != 0x04030201) { + ilSetError(IL_ILLEGAL_FILE_VALUE); + return IL_FALSE; + } + //@TODO: Additional types + if (Header.glType != I_GL_UNSIGNED_BYTE || Header.glTypeSize != 1) { + ilSetError(IL_ILLEGAL_FILE_VALUE); + return IL_FALSE; + } + //@TODO: Additional formats + if (Header.glFormat <= I_GL_ALPHA || Header.glFormat >= I_GL_LUMINANCE_ALPHA || Header.glInternalFormat != Header.glFormat /*|| Header.glBaseInternalFormat != Header.glFormat*/) { + ilSetError(IL_ILLEGAL_FILE_VALUE); + return IL_FALSE; + } + + //@TODO: Mipmaps, etc. + if (Header.numberOfArrayElements != 0 || Header.numberOfFaces != 1 || Header.numberOfMipmapLevels != 1) { + ilSetError(IL_ILLEGAL_FILE_VALUE); + return IL_FALSE; + } + //@TODO: Parse this data + if (iseek(Header.bytesOfKeyValueData, IL_SEEK_CUR)) + return IL_FALSE; + + switch (Header.glFormat) + { + case I_GL_LUMINANCE: + Bpp = 1; + Format = IL_LUMINANCE; + break; + case IL_LUMINANCE_ALPHA: + Bpp = 2; + Format = IL_LUMINANCE_ALPHA; + break; + case I_GL_RGB: + Bpp = 3; + Format = IL_RGB; + break; + case I_GL_RGBA: + Bpp = 4; + Format = IL_RGBA; + break; + default: + ilSetError(IL_ILLEGAL_FILE_VALUE); + return IL_FALSE; + } + + //@TODO: More than just RGBA + if (!ilTexImage(Header.pixelWidth, Header.pixelHeight, 1, Bpp, Format, IL_UNSIGNED_BYTE, NULL)) { + return IL_FALSE; + } + iCurImage->Origin = IL_ORIGIN_UPPER_LEFT; + + imageSize = GetLittleUInt(); + if (imageSize != Header.pixelWidth * Header.pixelHeight * Bpp) { + ilSetError(IL_ILLEGAL_FILE_VALUE); + return IL_FALSE; + } + + if (iread(iCurImage->Data, Bpp, Header.pixelWidth * Header.pixelHeight) != Header.pixelWidth * Header.pixelHeight) + return IL_FALSE; + + return ilFixImage(); +} + + +#endif//IL_NO_KTX |