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Martin Felis
91 lines
2.3 KiB
C++
Executable File
91 lines
2.3 KiB
C++
Executable File
//-----------------------------------------------------------------------------
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//
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// ImageLib Sources
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// Copyright (C) 2000-2009 by Denton Woods
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// Last modified: 01/15/2009
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//
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// Filename: src-IL/src/il_squish.cpp
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//
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// Description: Implements access to the Squish library.
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//
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//-----------------------------------------------------------------------------
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#include "il_internal.h"
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/*#include "il_dds.h"
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#include "il_manip.h"
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#include <limits.h>*/
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#ifdef IL_USE_DXTC_SQUISH
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#include <squish.h>
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#if defined(_WIN32) && defined(IL_USE_PRAGMA_LIBS)
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#if defined(_MSC_VER) || defined(__BORLANDC__)
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#ifndef _DEBUG
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#pragma comment(lib, "squish.lib")
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#else
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#pragma comment(lib, "squish-d.lib")
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#endif
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#endif
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#endif
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//! Compresses data to a DXT format using libsquish.
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// The data must be in unsigned byte RGBA format. The alpha channel will be ignored if DxtType is IL_DXT1.
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// DxtSize is used to return the size in bytes of the DXTC data returned.
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ILAPI ILubyte* ILAPIENTRY ilSquishCompressDXT(ILubyte *Data, ILuint Width, ILuint Height, ILuint Depth, ILenum DxtFormat, ILuint *DxtSize)
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{
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ILuint Size; //@TODO: Support larger than 32-bit data?
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ILint Flags;
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ILubyte *DxtcData;
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if (Data == NULL) { // We cannot operate on a null pointer.
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ilSetError(IL_INVALID_PARAM);
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return NULL;
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}
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// The nVidia Texture Tools library does not support volume textures yet.
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if (Depth != 1) {
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ilSetError(IL_INVALID_PARAM);
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return NULL;
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}
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switch (DxtFormat)
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{
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case IL_DXT1: // Should these two be
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case IL_DXT1A: // any different?
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Flags = squish::kDxt1;
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break;
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case IL_DXT3:
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Flags = squish::kDxt3;
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break;
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case IL_DXT5:
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Flags = squish::kDxt5;
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break;
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default: // Does not support DXT2 or DXT4.
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ilSetError(IL_INVALID_PARAM);
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break;
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}
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Size = squish::GetStorageRequirements(Width, Height, Flags);
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DxtcData = (ILubyte*)ialloc(Size);
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if (DxtcData == NULL)
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return NULL;
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squish::CompressImage(Data, Width, Height, DxtcData, Flags);
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*DxtSize = Size;
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return DxtcData;
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}
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#else
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// Let's have this so that the function is always created and exported, even if it does nothing.
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ILAPI ILubyte* ILAPIENTRY ilSquishCompressDXT(ILubyte *Data, ILuint Width, ILuint Height, ILuint Depth, ILenum DxtFormat, ILuint *DxtSize)
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{
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//@TODO: Do we need to set an error message?
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return NULL;
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}
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#endif//IL_NO_DXTC_SQUISH
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