148 lines
4.0 KiB
C++
148 lines
4.0 KiB
C++
/**
|
|
* @file llimagedxt.h
|
|
*
|
|
* $LicenseInfo:firstyear=2001&license=viewergpl$
|
|
*
|
|
* Copyright (c) 2001-2009, Linden Research, Inc.
|
|
*
|
|
* Second Life Viewer Source Code
|
|
* The source code in this file ("Source Code") is provided by Linden Lab
|
|
* to you under the terms of the GNU General Public License, version 2.0
|
|
* ("GPL"), unless you have obtained a separate licensing agreement
|
|
* ("Other License"), formally executed by you and Linden Lab. Terms of
|
|
* the GPL can be found in doc/GPL-license.txt in this distribution, or
|
|
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
|
|
*
|
|
* There are special exceptions to the terms and conditions of the GPL as
|
|
* it is applied to this Source Code. View the full text of the exception
|
|
* in the file doc/FLOSS-exception.txt in this software distribution, or
|
|
* online at
|
|
* http://secondlifegrid.net/programs/open_source/licensing/flossexception
|
|
*
|
|
* By copying, modifying or distributing this software, you acknowledge
|
|
* that you have read and understood your obligations described above,
|
|
* and agree to abide by those obligations.
|
|
*
|
|
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
|
|
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
|
|
* COMPLETENESS OR PERFORMANCE.
|
|
* $/LicenseInfo$
|
|
*/
|
|
|
|
#ifndef LL_LLIMAGEDXT_H
|
|
#define LL_LLIMAGEDXT_H
|
|
|
|
#include "llimage.h"
|
|
#include "llpointer.h"
|
|
|
|
// This class decodes and encodes LL DXT files (which may unclude uncompressed RGB or RGBA mipped data)
|
|
|
|
class LLImageDXT : public LLImageFormatted
|
|
{
|
|
public:
|
|
enum EFileFormat
|
|
{
|
|
FORMAT_UNKNOWN = 0,
|
|
FORMAT_I8 = 1,
|
|
FORMAT_A8,
|
|
FORMAT_RGB8,
|
|
FORMAT_RGBA8,
|
|
FORMAT_DXT1,
|
|
FORMAT_DXT2,
|
|
FORMAT_DXT3,
|
|
FORMAT_DXT4,
|
|
FORMAT_DXT5,
|
|
FORMAT_DXR1,
|
|
FORMAT_DXR2,
|
|
FORMAT_DXR3,
|
|
FORMAT_DXR4,
|
|
FORMAT_DXR5,
|
|
FORMAT_NOFILE = 0xff,
|
|
};
|
|
|
|
struct dxtfile_header_old_t
|
|
{
|
|
S32 format;
|
|
S32 maxlevel;
|
|
S32 maxwidth;
|
|
S32 maxheight;
|
|
};
|
|
|
|
struct dxtfile_header_t
|
|
{
|
|
S32 fourcc;
|
|
// begin DDSURFACEDESC2 struct
|
|
S32 header_size; // size of the header
|
|
S32 flags; // flags - unused
|
|
S32 maxheight;
|
|
S32 maxwidth;
|
|
S32 image_size; // size of the compressed image
|
|
S32 depth;
|
|
S32 num_mips;
|
|
S32 reserved[11];
|
|
struct pixel_format
|
|
{
|
|
S32 struct_size; // size of this structure
|
|
S32 flags;
|
|
S32 fourcc;
|
|
S32 bit_count;
|
|
S32 r_mask;
|
|
S32 g_mask;
|
|
S32 b_mask;
|
|
S32 a_mask;
|
|
} pixel_fmt;
|
|
S32 caps[4];
|
|
S32 reserved2;
|
|
};
|
|
|
|
protected:
|
|
/*virtual*/ ~LLImageDXT();
|
|
|
|
private:
|
|
BOOL encodeDXT(const LLImageRaw* raw_image, F32 decode_time, bool explicit_mips);
|
|
|
|
public:
|
|
LLImageDXT();
|
|
|
|
/*virtual*/ std::string getExtension() { return std::string("dxt"); }
|
|
/*virtual*/ BOOL updateData();
|
|
|
|
/*virtual*/ BOOL decode(LLImageRaw* raw_image, F32 decode_time);
|
|
/*virtual*/ BOOL encode(const LLImageRaw* raw_image, F32 encode_time);
|
|
|
|
/*virtual*/ S32 calcHeaderSize();
|
|
/*virtual*/ S32 calcDataSize(S32 discard_level = 0);
|
|
|
|
BOOL getMipData(LLPointer<LLImageRaw>& raw, S32 discard=-1);
|
|
|
|
void setFormat();
|
|
S32 getMipOffset(S32 discard);
|
|
|
|
EFileFormat getFileFormat() { return mFileFormat; }
|
|
bool isCompressed() { return (mFileFormat >= FORMAT_DXT1 && mFileFormat <= FORMAT_DXR5); }
|
|
|
|
bool convertToDXR(); // convert from DXT to DXR
|
|
|
|
static void checkMinWidthHeight(EFileFormat format, S32& width, S32& height);
|
|
static S32 formatBits(EFileFormat format);
|
|
static S32 formatBytes(EFileFormat format, S32 width, S32 height);
|
|
static S32 formatOffset(EFileFormat format, S32 width, S32 height, S32 max_width, S32 max_height);
|
|
static S32 formatComponents(EFileFormat format);
|
|
|
|
static EFileFormat getFormat(S32 fourcc);
|
|
static S32 getFourCC(EFileFormat format);
|
|
|
|
static void calcDiscardWidthHeight(S32 discard_level, EFileFormat format, S32& width, S32& height);
|
|
static S32 calcNumMips(S32 width, S32 height);
|
|
|
|
private:
|
|
static void extractMip(const U8 *indata, U8* mipdata, int width, int height,
|
|
int mip_width, int mip_height, EFileFormat format);
|
|
|
|
private:
|
|
EFileFormat mFileFormat;
|
|
S32 mHeaderSize;
|
|
};
|
|
|
|
#endif
|