diff options
Diffstat (limited to 'DevIL/src-IL/src/il_fastconv.cpp')
| -rw-r--r-- | DevIL/src-IL/src/il_fastconv.cpp | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/DevIL/src-IL/src/il_fastconv.cpp b/DevIL/src-IL/src/il_fastconv.cpp new file mode 100644 index 00000000..1103a878 --- /dev/null +++ b/DevIL/src-IL/src/il_fastconv.cpp @@ -0,0 +1,290 @@ +//----------------------------------------------------------------------------- +// +// ImageLib Sources +// Copyright (C) 2000-2008 by Denton Woods +// Last modified: 07/07/2006 +// +// Filename: src-IL/src/il_fastconv.c +// +// Description: Converts between several image formats +// +//----------------------------------------------------------------------------- + + +#include "il_internal.h" +#ifdef ALTIVEC_GCC +#include "altivec_typeconversion.h" +#endif + +ILboolean iFastConvert(ILenum DestFormat) +{ + ILubyte *BytePtr = iCurImage->Data; + ILushort *ShortPtr = (ILushort*)iCurImage->Data; + ILuint *IntPtr = (ILuint*)iCurImage->Data; + ILfloat *FloatPtr = (ILfloat*)iCurImage->Data; + ILdouble *DblPtr = (ILdouble*)iCurImage->Data; + +#ifndef ALTIVEC_GCC + ILuint SizeOfData, i=0; + ILubyte TempByte = 0; + ILushort TempShort = 0; + ILuint TempInt = 0; + ILfloat TempFloat = 0; + ILdouble TempDbl = 0; +#endif + + switch (DestFormat) + { + case IL_RGB: + case IL_BGR: + if (iCurImage->Format != IL_RGB && iCurImage->Format != IL_BGR) + return IL_FALSE; + + switch (iCurImage->Type) + { + case IL_BYTE: + case IL_UNSIGNED_BYTE: + #ifdef ALTIVEC_GCC + abc2cba_byte(BytePtr,iCurImage->SizeOfData,BytePtr); + #else + SizeOfData = iCurImage->SizeOfData / 3; + #ifdef USE_WIN32_ASM + __asm + { + mov ebx, BytePtr + mov ecx, SizeOfData + L1: + mov al,[ebx+0] + xchg al,[ebx+2] + mov [ebx+0],al + add ebx,3 + loop L1 + } + #else + for (i = 0; i < SizeOfData; i++) { + TempByte = BytePtr[0]; + BytePtr[0] = BytePtr[2]; + BytePtr[2] = TempByte; + BytePtr += 3; + } + #endif//USE_WIN32_ASM + #endif + return IL_TRUE; + + case IL_SHORT: + case IL_UNSIGNED_SHORT: + #ifdef ALTIVEC_GCC + abc2cba_short(ShortPtr,iCurImage->SizeOfData,ShortPtr); + #else + SizeOfData = iCurImage->SizeOfData / 6; // 3*2 + #ifdef USE_WIN32_ASM + __asm + { + mov ebx, ShortPtr + mov ecx, SizeOfData + L2: + mov ax,[ebx+0] + xchg ax,[ebx+4] + mov [ebx+0],ax + add ebx,6 + loop L2 + } + #else + for (i = 0; i < SizeOfData; i++) { + TempShort = ShortPtr[0]; + ShortPtr[0] = ShortPtr[2]; + ShortPtr[2] = TempShort; + ShortPtr += 3; + } + #endif//USE_WIN32_ASM + #endif + return IL_TRUE; + + case IL_INT: + case IL_UNSIGNED_INT: + #ifdef ALTIVEC_GCC + abc2cba_int(IntPtr,iCurImage->SizeOfData,IntPtr); + #else + SizeOfData = iCurImage->SizeOfData / 12; // 3*4 + #ifdef USE_WIN32_ASM + __asm + { + mov ebx, IntPtr + mov ecx, SizeOfData + L3: + mov eax,[ebx+0] + xchg eax,[ebx+8] + mov [ebx+0],ax + add ebx,12 + loop L3 + } + #else + for (i = 0; i < SizeOfData; i++) { + TempInt = IntPtr[0]; + IntPtr[0] = IntPtr[2]; + IntPtr[2] = TempInt; + IntPtr += 3; + } + #endif//USE_WIN32_ASM + #endif + return IL_TRUE; + + case IL_FLOAT: + #ifdef ALTIVEC_GCC + abc2cba_float(FloatPtr,iCurImage->SizeOfData,FloatPtr); + #else + SizeOfData = iCurImage->SizeOfData / 12; // 3*4 + for (i = 0; i < SizeOfData; i++) { + TempFloat = FloatPtr[0]; + FloatPtr[0] = FloatPtr[2]; + FloatPtr[2] = TempFloat; + FloatPtr += 3; + } + #endif + return IL_TRUE; + + case IL_DOUBLE: + #ifdef ALTIVEC_GCC + abc2cba_double(DblPtr,iCurImage->SizeOfData,DblPtr); + #else + SizeOfData = iCurImage->SizeOfData / 24; // 3*8 + for (i = 0; i < SizeOfData; i++) { + TempDbl = DblPtr[0]; + DblPtr[0] = DblPtr[2]; + DblPtr[2] = TempDbl; + DblPtr += 3; + } + #endif + return IL_TRUE; + } + break; + + case IL_RGBA: + case IL_BGRA: + if (iCurImage->Format != IL_RGBA && iCurImage->Format != IL_BGRA) + return IL_FALSE; + + switch (iCurImage->Type) + { + case IL_BYTE: + case IL_UNSIGNED_BYTE: + #ifdef ALTIVEC_GCC + abcd2cbad_byte(BytePtr,iCurImage->SizeOfData,BytePtr); + #else + SizeOfData = iCurImage->SizeOfData / 4; + #ifdef USE_WIN32_ASM + __asm + { + mov ebx, BytePtr + mov ecx, SizeOfData + L4: + mov eax,[ebx] + bswap eax + ror eax,8 + mov [ebx], eax + add ebx,4 + loop L4 + } + #else + for (i = 0; i < SizeOfData; i++) { + TempByte = BytePtr[0]; + BytePtr[0] = BytePtr[2]; + BytePtr[2] = TempByte; + BytePtr += 4; + } + #endif//USE_WIN32_ASM + #endif + return IL_TRUE; + + case IL_SHORT: + case IL_UNSIGNED_SHORT: + #ifdef ALTIVEC_GCC + abcd2cbad_short(ShortPtr,iCurImage->SizeOfData,ShortPtr); + #else + SizeOfData = iCurImage->SizeOfData / 8; // 4*2 + #ifdef USE_WIN32_ASM + __asm + { + mov ebx, ShortPtr + mov ecx, SizeOfData + L5: + mov ax,[ebx+0] + xchg ax,[ebx+4] + mov [ebx+0],ax + add ebx,8 + loop L5 + } + #else + for (i = 0; i < SizeOfData; i++) { + TempShort = ShortPtr[0]; + ShortPtr[0] = ShortPtr[2]; + ShortPtr[2] = TempShort; + ShortPtr += 4; + } + #endif//USE_WIN32_ASM + #endif + return IL_TRUE; + + case IL_INT: + case IL_UNSIGNED_INT: + #ifdef ALTIVEC_GCC + abcd2cbad_int(IntPtr,iCurImage->SizeOfData,IntPtr); + #else + SizeOfData = iCurImage->SizeOfData / 16; // 4*4 + #ifdef USE_WIN32_ASM + __asm + { + mov ebx, IntPtr + mov ecx, SizeOfData + L6: + mov eax,[ebx+0] + xchg eax,[ebx+8] + mov [ebx+0],ax + add ebx,16 + loop L6 + } + #else + for (i = 0; i < SizeOfData; i++) { + TempInt = IntPtr[0]; + IntPtr[0] = IntPtr[2]; + IntPtr[2] = TempInt; + IntPtr += 4; + } + #endif//USE_WIN32_ASM + #endif + return IL_TRUE; + + case IL_FLOAT: + #ifdef ALTIVEC_GCC + abcd2cbad_float(FloatPtr,iCurImage->SizeOfData,FloatPtr); + #else + SizeOfData = iCurImage->SizeOfData / 16; // 4*4 + for (i = 0; i < SizeOfData; i++) { + TempFloat = FloatPtr[0]; + FloatPtr[0] = FloatPtr[2]; + FloatPtr[2] = TempFloat; + FloatPtr += 4; + } + #endif + return IL_TRUE; + + case IL_DOUBLE: + #ifdef ALTIVEC_GCC + abcd2cbad_double(DblPtr,iCurImage->SizeOfData,DblPtr); + #else + SizeOfData = iCurImage->SizeOfData / 32; // 4*8 + for (i = 0; i < SizeOfData; i++) { + TempDbl = DblPtr[0]; + DblPtr[0] = DblPtr[2]; + DblPtr[2] = TempDbl; + DblPtr += 4; + } + #endif + return IL_TRUE; + } + } + + + return IL_FALSE; +} + |