142 lines
3.6 KiB
C++
142 lines
3.6 KiB
C++
/**
|
|
* @file llimagedxt.h
|
|
*
|
|
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
|
|
* Second Life Viewer Source Code
|
|
* Copyright (C) 2010, Linden Research, Inc.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation;
|
|
* version 2.1 of the License only.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
|
|
* $/LicenseInfo$
|
|
*/
|
|
|
|
#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
|