Xash3D FWGS engine.
 
 
 
 

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/*
imagelib.h - engine image lib
Copyright (C) 2008 Uncle Mike
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
*/
#ifndef IMAGELIB_H
#define IMAGELIB_H
#include "common.h"
// skyorder_q2[6] = { 2, 3, 1, 0, 4, 5, }; // Quake, Half-Life skybox ordering
// skyorder_ms[6] = { 4, 5, 1, 0, 2, 3 }; // Microsoft DDS ordering (reverse)
// cubemap hints
typedef enum
{
CB_HINT_NO = 0,
// dds cubemap hints ( Microsoft sides order )
CB_HINT_POSX,
CB_HINT_NEGX,
CB_HINT_POSZ,
CB_HINT_NEGZ,
CB_HINT_POSY,
CB_HINT_NEGY,
CB_FACECOUNT,
} side_hint_t;
typedef enum
{
IL_HINT_NO = 0,
IL_HINT_Q1, // palette choosing
IL_HINT_HL,
} image_hint_t;
typedef struct loadformat_s
{
const char *formatstring;
const char *ext;
qboolean (*loadfunc)( const char *name, const byte *buffer, size_t filesize );
image_hint_t hint;
} loadpixformat_t;
typedef struct saveformat_s
{
const char *formatstring;
const char *ext;
qboolean (*savefunc)( const char *name, rgbdata_t *pix );
} savepixformat_t;
typedef struct imglib_s
{
const loadpixformat_t *loadformats;
const savepixformat_t *saveformats;
// current 2d image state
word width;
word height;
word depth;
byte num_mips; // mipmap count
word encode; // custom encode type
uint type; // main type switcher
uint flags; // additional image flags
size_t size; // image rgba size (for bounds checking)
uint ptr; // safe image pointer
int bpp; // PFDesc[type].bpp
byte *rgba; // image pointer (see image_type for details)
// current cubemap state
int source_width; // locked cubemap dims (all wrong sides will be automatically resampled)
int source_height;
uint source_type; // shared image type for all mipmaps or cubemap sides
int num_sides; // how much sides is loaded
byte *cubemap; // cubemap pack
// indexed images state
uint *d_currentpal; // installed version of internal palette
int d_rendermode; // palette rendermode
byte *palette; // palette pointer
// global parms
rgba_t fogParams; // some water textures has info about underwater fog
image_hint_t hint; // hint for some loaders
byte *tempbuffer; // for convert operations
int cmd_flags; // global imglib flags
int force_flags; // override cmd_flags
qboolean custom_palette; // custom palette was installed
} imglib_t;
/*
========================================================================
.BMP image format
========================================================================
*/
#pragma pack( 1 )
typedef struct
{
char id[2]; // bmfh.bfType
dword fileSize; // bmfh.bfSize
dword reserved0; // bmfh.bfReserved1 + bmfh.bfReserved2
dword bitmapDataOffset; // bmfh.bfOffBits
dword bitmapHeaderSize; // bmih.biSize
int width; // bmih.biWidth
int height; // bmih.biHeight
word planes; // bmih.biPlanes
word bitsPerPixel; // bmih.biBitCount
dword compression; // bmih.biCompression
dword bitmapDataSize; // bmih.biSizeImage
dword hRes; // bmih.biXPelsPerMeter
dword vRes; // bmih.biYPelsPerMeter
dword colors; // bmih.biClrUsed
dword importantColors; // bmih.biClrImportant
} bmp_t;
#pragma pack( )
/*
========================================================================
.TGA image format (Truevision Targa)
========================================================================
*/
#pragma pack( 1 )
typedef struct tga_s
{
byte id_length;
byte colormap_type;
byte image_type;
word colormap_index;
word colormap_length;
byte colormap_size;
word x_origin;
word y_origin;
word width;
word height;
byte pixel_size;
byte attributes;
} tga_t;
#pragma pack( )
/*
========================================================================
.DDS image format
========================================================================
*/
#define DDSHEADER ((' '<<24)+('S'<<16)+('D'<<8)+'D') // little-endian "DDS "
// various four-cc types
#define TYPE_DXT1 (('1'<<24)+('T'<<16)+('X'<<8)+'D') // little-endian "DXT1"
#define TYPE_DXT2 (('2'<<24)+('T'<<16)+('X'<<8)+'D') // little-endian "DXT2"
#define TYPE_DXT3 (('3'<<24)+('T'<<16)+('X'<<8)+'D') // little-endian "DXT3"
#define TYPE_DXT4 (('4'<<24)+('T'<<16)+('X'<<8)+'D') // little-endian "DXT4"
#define TYPE_DXT5 (('5'<<24)+('T'<<16)+('X'<<8)+'D') // little-endian "DXT5"
#define TYPE_ATI1 (('1'<<24)+('I'<<16)+('T'<<8)+'A') // little-endian "ATI1"
#define TYPE_ATI2 (('2'<<24)+('I'<<16)+('T'<<8)+'A') // little-endian "ATI2"
#define TYPE_RXGB (('B'<<24)+('G'<<16)+('X'<<8)+'R') // little-endian "RXGB" doom3 normalmaps
#define TYPE_$ (('\0'<<24)+('\0'<<16)+('\0'<<8)+'$') // little-endian "$"
#define TYPE_o (('\0'<<24)+('\0'<<16)+('\0'<<8)+'o') // little-endian "o"
#define TYPE_p (('\0'<<24)+('\0'<<16)+('\0'<<8)+'p') // little-endian "p"
#define TYPE_q (('\0'<<24)+('\0'<<16)+('\0'<<8)+'q') // little-endian "q"
#define TYPE_r (('\0'<<24)+('\0'<<16)+('\0'<<8)+'r') // little-endian "r"
#define TYPE_s (('\0'<<24)+('\0'<<16)+('\0'<<8)+'s') // little-endian "s"
#define TYPE_t (('\0'<<24)+('\0'<<16)+('\0'<<8)+'t') // little-endian "t"
// dwFlags1
#define DDS_CAPS 0x00000001L
#define DDS_HEIGHT 0x00000002L
#define DDS_WIDTH 0x00000004L
#define DDS_PITCH 0x00000008L
#define DDS_PIXELFORMAT 0x00001000L
#define DDS_MIPMAPCOUNT 0x00020000L
#define DDS_LINEARSIZE 0x00080000L
#define DDS_DEPTH 0x00800000L
// dwFlags2
#define DDS_ALPHAPIXELS 0x00000001L
#define DDS_ALPHA 0x00000002L
#define DDS_FOURCC 0x00000004L
#define DDS_RGB 0x00000040L
#define DDS_RGBA 0x00000041L // (DDS_RGB|DDS_ALPHAPIXELS)
#define DDS_LUMINANCE 0x00020000L
#define DDS_DUDV 0x00080000L
// dwCaps1
#define DDS_COMPLEX 0x00000008L
#define DDS_TEXTURE 0x00001000L
#define DDS_MIPMAP 0x00400000L
// dwCaps2
#define DDS_CUBEMAP 0x00000200L
#define DDS_CUBEMAP_POSITIVEX 0x00000400L
#define DDS_CUBEMAP_NEGATIVEX 0x00000800L
#define DDS_CUBEMAP_POSITIVEY 0x00001000L
#define DDS_CUBEMAP_NEGATIVEY 0x00002000L
#define DDS_CUBEMAP_POSITIVEZ 0x00004000L
#define DDS_CUBEMAP_NEGATIVEZ 0x00008000L
#define DDS_CUBEMAP_ALL_SIDES 0x0000FC00L
#define DDS_VOLUME 0x00200000L
typedef struct dds_pf_s
{
uint dwSize;
uint dwFlags;
uint dwFourCC;
uint dwRGBBitCount;
uint dwRBitMask;
uint dwGBitMask;
uint dwBBitMask;
uint dwABitMask;
} dds_pixf_t;
// DDCAPS2
typedef struct dds_caps_s
{
uint dwCaps1;
uint dwCaps2;
uint dwCaps3; // currently unused
uint dwCaps4; // currently unused
} dds_caps_t;
typedef struct dds_s
{
uint dwIdent; // must matched with DDSHEADER
uint dwSize;
uint dwFlags; // determines what fields are valid
uint dwHeight;
uint dwWidth;
uint dwLinearSize; // Formless late-allocated optimized surface size
uint dwDepth; // depth if a volume texture
uint dwMipMapCount; // number of mip-map levels requested
uint dwAlphaBitDepth; // depth of alpha buffer requested
uint dwReserved1[10]; // reserved for future expansions
dds_pixf_t dsPixelFormat;
dds_caps_t dsCaps;
uint dwTextureStage;
} dds_t;
// imagelib definitions
#define IMAGE_MAXWIDTH 8192
#define IMAGE_MAXHEIGHT 8192
#define LUMP_MAXWIDTH 1024 // WorldCraft limits
#define LUMP_MAXHEIGHT 1024
enum
{
LUMP_NORMAL = 0, // no alpha
LUMP_MASKED, // 1-bit alpha channel masked texture
LUMP_GRADIENT, // gradient image (decals)
LUMP_EXTENDED, // bmp images have extened palette with alpha-channel
LUMP_HALFLIFE, // get predefined half-life palette
LUMP_QUAKE1 // get predefined quake palette
};
enum
{
PAL_INVALID = -1,
PAL_CUSTOM = 0,
PAL_QUAKE1,
PAL_HALFLIFE
};
extern imglib_t image;
byte *Image_ResampleInternal( const void *indata, int in_w, int in_h, int out_w, int out_h, int intype, qboolean *done );
byte *Image_FlipInternal( const byte *in, word *srcwidth, word *srcheight, int type, int flags );
rgbdata_t *Image_Load(const char *filename, const byte *buffer, size_t buffsize );
qboolean Image_Copy8bitRGBA( const byte *in, byte *out, int pixels );
qboolean Image_AddIndexedImageToPack( const byte *in, int width, int height );
qboolean Image_AddRGBAImageToPack( uint imageSize, const void* data );
void Image_Save( const char *filename, rgbdata_t *pix );
void Image_GetPaletteLMP( const byte *pal, int rendermode );
void Image_GetPaletteBMP( const byte *pal );
int Image_ComparePalette( const byte *pal );
void Image_FreeImage( rgbdata_t *pack );
void Image_CopyPalette24bit( void );
void Image_CopyPalette32bit( void );
void Image_SetPixelFormat( void );
void Image_GetPaletteQ1( void );
void Image_GetPaletteHL( void );
//
// formats load
//
qboolean Image_LoadMIP( const char *name, const byte *buffer, size_t filesize );
qboolean Image_LoadMDL( const char *name, const byte *buffer, size_t filesize );
qboolean Image_LoadSPR( const char *name, const byte *buffer, size_t filesize );
qboolean Image_LoadTGA( const char *name, const byte *buffer, size_t filesize );
qboolean Image_LoadBMP( const char *name, const byte *buffer, size_t filesize );
qboolean Image_LoadDDS( const char *name, const byte *buffer, size_t filesize );
qboolean Image_LoadFNT( const char *name, const byte *buffer, size_t filesize );
qboolean Image_LoadLMP( const char *name, const byte *buffer, size_t filesize );
qboolean Image_LoadPAL( const char *name, const byte *buffer, size_t filesize );
//
// formats save
//
qboolean Image_SaveTGA( const char *name, rgbdata_t *pix );
qboolean Image_SaveBMP( const char *name, rgbdata_t *pix );
//
// img_quant.c
//
rgbdata_t *Image_Quantize( rgbdata_t *pic );
//
// img_utils.c
//
void Image_Reset( void );
rgbdata_t *ImagePack( void );
byte *Image_Copy( size_t size );
void Image_CopyParms( rgbdata_t *src );
qboolean Image_ValidSize( const char *name );
qboolean Image_LumpValidSize( const char *name );
qboolean Image_CheckFlag( int bit );
#endif//IMAGELIB_H