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Paranoia2/utils/common/imagelib.cpp

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/*
imagelib.cpp - simple loader\serializer for TGA & BMP
Copyright (C) 2015 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.
*/
#include "conprint.h"
#include <windows.h>
#include <direct.h>
#include <fcntl.h>
#include <stdio.h>
#include <io.h>
#include "cmdlib.h"
#include "stringlib.h"
#include "imagelib.h"
#include "filesystem.h"
#include "ddstex.h"
#include "mathlib.h"
// suffix converts to img_type and back
const imgtype_t img_hints[] =
{
{ "_mask", IMG_ALPHAMASK }, // alpha-channel stored to another lump
{ "_norm", IMG_NORMALMAP }, // indexed normalmap
{ "_n", IMG_NORMALMAP }, // indexed normalmap
{ "_nrm", IMG_NORMALMAP }, // indexed normalmap
{ "_local", IMG_NORMALMAP }, // indexed normalmap
{ "_ddn", IMG_NORMALMAP }, // indexed normalmap
{ "_spec", IMG_GLOSSMAP }, // grayscale\color specular
{ "_gloss", IMG_GLOSSMAP }, // grayscale\color specular
{ "_hmap", IMG_HEIGHTMAP }, // heightmap (can be converted to normalmap)
{ "_height", IMG_HEIGHTMAP }, // heightmap (can be converted to normalmap)
{ "_luma", IMG_LUMA }, // self-illuminate parts on the diffuse
{ "_add", IMG_LUMA }, // self-illuminate parts on the diffuse
{ "_illum", IMG_LUMA }, // self-illuminate parts on the diffuse
{ "_bump", IMG_STALKER_BUMP }, // stalker two-component bump
{ "_bump#", IMG_STALKER_GLOSS}, // stalker two-component bump
{ "ft", IMG_SKYBOX_FT },
{ "bk", IMG_SKYBOX_BK },
{ "up", IMG_SKYBOX_UP },
{ "dn", IMG_SKYBOX_DN },
{ "rt", IMG_SKYBOX_RT },
{ "lf", IMG_SKYBOX_LF },
{ "px", IMG_CUBEMAP_PX },
{ "nx", IMG_CUBEMAP_NX },
{ "py", IMG_CUBEMAP_PY },
{ "ny", IMG_CUBEMAP_NY },
{ "pz", IMG_CUBEMAP_PZ },
{ "nz", IMG_CUBEMAP_NZ },
{ NULL, 0 } // terminator
};
static const loadimage_t load_hint[] =
{
{ "%s%s.%s", "bmp", Image_LoadBMP }, // Windows Bitmap
{ "%s%s.%s", "tga", Image_LoadTGA }, // TrueVision Targa
{ "%s%s.%s", "dds", Image_LoadDDS }, // DirectDraw Surface
{ NULL, NULL, NULL }
};
// Xash3D normal instance
static const saveimage_t save_hint[] =
{
{ "%s%s.%s", "bmp", Image_SaveBMP }, // Windows Bitmap
{ "%s%s.%s", "tga", Image_SaveTGA }, // TrueVision Targa
{ "%s%s.%s", "dds", Image_SaveDDS }, // DirectDraw Surface
{ NULL, NULL, NULL }
};
/*
=================
Image_ValidSize
check image for valid dimensions
=================
*/
bool Image_ValidSize( const char *name, int width, int height )
{
if( width > IMAGE_MAXWIDTH || height > IMAGE_MAXHEIGHT || width < IMAGE_MINWIDTH || height < IMAGE_MINHEIGHT )
{
MsgDev( D_ERROR, "Image: %s has invalid sizes %i x %i\n", name, width, height );
return false;
}
return true;
}
/*
=================
Image_Alloc
allocate image struct and partially fill it
=================
*/
rgbdata_t *Image_Alloc( int width, int height, bool paletted )
{
size_t pic_size = sizeof( rgbdata_t ) + (width * height * 4);
rgbdata_t *pic = (rgbdata_t *)Mem_Alloc( pic_size );
pic->buffer = ((byte *)pic) + sizeof( rgbdata_t );
pic->size = (width * height * 4);
pic->width = width;
pic->height = height;
return pic;
}
/*
=================
Image_AllocCubemap
allocate image struct and partially fill it
=================
*/
rgbdata_t *Image_AllocCubemap( int width, int height )
{
size_t pic_size = sizeof( rgbdata_t ) + (width * height * 4 * 6);
rgbdata_t *pic = (rgbdata_t *)Mem_Alloc( pic_size );
pic->buffer = ((byte *)pic) + sizeof( rgbdata_t );
pic->size = (width * height * 4 * 6);
pic->width = width;
pic->height = height;
SetBits( pic->flags, IMAGE_CUBEMAP );
return pic;
}
/*
=================
Image_AllocSkybox
allocate image struct and partially fill it
=================
*/
rgbdata_t *Image_AllocSkybox( int width, int height )
{
size_t pic_size = sizeof( rgbdata_t ) + (width * height * 4 * 6);
rgbdata_t *pic = (rgbdata_t *)Mem_Alloc( pic_size );
pic->buffer = ((byte *)pic) + sizeof( rgbdata_t );
pic->size = (width * height * 4 * 6);
pic->width = width;
pic->height = height;
SetBits( pic->flags, IMAGE_SKYBOX );
return pic;
}
/*
=================
Image_Copy
make an copy of image
=================
*/
rgbdata_t *Image_Copy( rgbdata_t *src )
{
size_t pic_size = sizeof( rgbdata_t ) + src->size;
rgbdata_t *dst = (rgbdata_t *)Mem_Alloc( pic_size );
dst->buffer = ((byte *)dst) + sizeof( rgbdata_t );
memcpy( dst->buffer, src->buffer, src->size );
dst->size = src->size;
dst->width = src->width;
dst->height = src->height;
dst->flags = src->flags;
VectorCopy( src->reflectivity, dst->reflectivity );
return dst;
}
/*
===========
Image_HintFromSuf
Convert name suffix into image type
===========
*/
char Image_HintFromSuf( const char *lumpname )
{
char barename[64];
char suffix[16];
const imgtype_t *hint;
// trying to extract hint from the name
Q_strncpy( barename, lumpname, sizeof( barename ));
// we not known about filetype, so match only by filename
for( hint = img_hints; hint->ext; hint++ )
{
if( Q_strlen( barename ) <= Q_strlen( hint->ext ))
continue; // name too short
Q_strncpy( suffix, barename + Q_strlen( barename ) - Q_strlen( hint->ext ), sizeof( suffix ));
if( !Q_stricmp( suffix, hint->ext ))
return hint->type;
}
// special additional check for "_normal"
if( Q_stristr( lumpname, "_normal" ))
return IMG_NORMALMAP;
// no any special type was found
return IMG_DIFFUSE;
}
const imgtype_t *Image_ImageTypeFromHint( char value )
{
const imgtype_t *hint;
// we not known about filetype, so match only by filename
for( hint = img_hints; hint->ext; hint++ )
{
if( hint->type == value )
return hint;
}
return NULL;
}
void Image_PackRGB( float flColor[3], dword &icolor )
{
byte rgba[4];
rgba[0] = LinearToTexture( flColor[0] );
rgba[1] = LinearToTexture( flColor[1] );
rgba[2] = LinearToTexture( flColor[2] );
icolor = (0xFF << 24) | (rgba[2] << 16) | (rgba[1] << 8) | rgba[0];
}
void Image_UnpackRGB( dword icolor, float flColor[3] )
{
flColor[0] = TextureToLinear((icolor & 0x000000FF) >> 0 );
flColor[1] = TextureToLinear((icolor & 0x0000FF00) >> 8 );
flColor[2] = TextureToLinear((icolor & 0x00FF0000) >> 16);
}
/*
=============================================================================
IMAGE LOADING
=============================================================================
*/
/*
=============
Image_LoadTGA
expand any image to RGBA32 but keep 8-bit unchanged
=============
*/
rgbdata_t *Image_LoadTGA( const char *name, const byte *buffer, size_t filesize )
{
int i, columns, rows, row_inc, row, col;
byte *buf_p, *pixbuf, *targa_rgba;
byte palette[256][4], red = 0, green = 0, blue = 0, alpha = 0;
int readpixelcount, pixelcount, palIndex;
tga_t targa_header;
bool compressed;
rgbdata_t *pic;
if( filesize < sizeof( tga_t ))
return NULL;
buf_p = (byte *)buffer;
targa_header.id_length = *buf_p++;
targa_header.colormap_type = *buf_p++;
targa_header.image_type = *buf_p++;
targa_header.colormap_index = *(short *)buf_p; buf_p += 2;
targa_header.colormap_length = *(short *)buf_p; buf_p += 2;
targa_header.colormap_size = *buf_p; buf_p += 1;
targa_header.x_origin = *(short *)buf_p; buf_p += 2;
targa_header.y_origin = *(short *)buf_p; buf_p += 2;
targa_header.width = *(short *)buf_p; buf_p += 2;
targa_header.height = *(short *)buf_p; buf_p += 2;
targa_header.pixel_size = *buf_p++;
targa_header.attributes = *buf_p++;
if( targa_header.id_length != 0 )
buf_p += targa_header.id_length; // skip TARGA image comment
// check for tga file
if( !Image_ValidSize( name, targa_header.width, targa_header.height ))
return NULL;
if( targa_header.image_type == 1 || targa_header.image_type == 9 )
{
// uncompressed colormapped image
if( targa_header.pixel_size != 8 )
{
MsgDev( D_WARN, "Image_LoadTGA: (%s) Only 8 bit images supported for type 1 and 9\n", name );
return NULL;
}
if( targa_header.colormap_length != 256 )
{
MsgDev( D_WARN, "Image_LoadTGA: (%s) Only 8 bit colormaps are supported for type 1 and 9\n", name );
return NULL;
}
if( targa_header.colormap_index )
{
MsgDev( D_WARN, "Image_LoadTGA: (%s) colormap_index is not supported for type 1 and 9\n", name );
return NULL;
}
if( targa_header.colormap_size == 24 )
{
for( i = 0; i < targa_header.colormap_length; i++ )
{
palette[i][2] = *buf_p++;
palette[i][1] = *buf_p++;
palette[i][0] = *buf_p++;
palette[i][3] = 255;
}
}
else if( targa_header.colormap_size == 32 )
{
for( i = 0; i < targa_header.colormap_length; i++ )
{
palette[i][2] = *buf_p++;
palette[i][1] = *buf_p++;
palette[i][0] = *buf_p++;
palette[i][3] = *buf_p++;
}
}
else
{
MsgDev( D_WARN, "Image_LoadTGA: (%s) only 24 and 32 bit colormaps are supported for type 1 and 9\n", name );
return NULL;
}
}
else if( targa_header.image_type == 2 || targa_header.image_type == 10 )
{
// uncompressed or RLE compressed RGB
if( targa_header.pixel_size != 32 && targa_header.pixel_size != 24 )
{
MsgDev( D_WARN, "Image_LoadTGA: (%s) Only 32 or 24 bit images supported for type 2 and 10\n", name );
return NULL;
}
}
else if( targa_header.image_type == 3 || targa_header.image_type == 11 )
{
// uncompressed greyscale
if( targa_header.pixel_size != 8 )
{
MsgDev( D_WARN, "Image_LoadTGA: (%s) Only 8 bit images supported for type 3 and 11\n", name );
return NULL;
}
}
pic = Image_Alloc( targa_header.width, targa_header.height );
columns = targa_header.width;
rows = targa_header.height;
targa_rgba = pic->buffer;
// if bit 5 of attributes isn't set, the image has been stored from bottom to top
if( targa_header.attributes & 0x20 )
{
pixbuf = targa_rgba;
row_inc = 0;
}
else
{
pixbuf = targa_rgba + ( rows - 1 ) * columns * 4;
row_inc = -columns * 4 * 2;
}
compressed = ( targa_header.image_type == 9 || targa_header.image_type == 10 || targa_header.image_type == 11 );
for( row = col = 0; row < rows; )
{
pixelcount = 0x10000;
readpixelcount = 0x10000;
if( compressed )
{
pixelcount = *buf_p++;
if( pixelcount & 0x80 ) // run-length packet
readpixelcount = 1;
pixelcount = 1 + ( pixelcount & 0x7f );
}
while( pixelcount-- && ( row < rows ) )
{
if( readpixelcount-- > 0 )
{
switch( targa_header.image_type )
{
case 1:
case 9:
// colormapped image
palIndex = *buf_p++;
red = palette[palIndex][0];
green = palette[palIndex][1];
blue = palette[palIndex][2];
alpha = palette[palIndex][3];
break;
case 2:
case 10:
// 24 or 32 bit image
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alpha = 255;
if( targa_header.pixel_size == 32 )
alpha = *buf_p++;
break;
case 3:
case 11:
// greyscale image
blue = green = red = *buf_p++;
alpha = 255;
break;
}
}
if( red != green || green != blue )
pic->flags |= IMAGE_HAS_COLOR;
if( alpha != 255 )
{
if( alpha != 0 )
{
SetBits( pic->flags, IMAGE_HAS_8BIT_ALPHA );
ClearBits( pic->flags, IMAGE_HAS_1BIT_ALPHA );
}
else if( !FBitSet( pic->flags, IMAGE_HAS_8BIT_ALPHA ))
SetBits( pic->flags, IMAGE_HAS_1BIT_ALPHA );
}
pic->reflectivity[0] += TextureToLinear( red );
pic->reflectivity[1] += TextureToLinear( green );
pic->reflectivity[2] += TextureToLinear( blue );
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alpha;
if( ++col == columns )
{
// run spans across rows
row++;
col = 0;
pixbuf += row_inc;
}
}
}
VectorDivide( pic->reflectivity, ( pic->width * pic->height ), pic->reflectivity );
return pic;
}
/*
=============
Image_LoadBMP
expand any image to RGBA32 but keep 8-bit unchanged
=============
*/
rgbdata_t *Image_LoadBMP( const char *name, const byte *buffer, size_t filesize )
{
byte *buf_p, *pixbuf;
byte palette[256][4];
int columns, column, rows, row, bpp = 4;
int cbPalBytes = 0, padSize = 0, bps = 0;
rgbdata_t *pic;
bmp_t bhdr;
if( filesize < sizeof( bhdr ))
return NULL;
buf_p = (byte *)buffer;
bhdr.id[0] = *buf_p++;
bhdr.id[1] = *buf_p++; // move pointer
bhdr.fileSize = *(long *)buf_p; buf_p += 4;
bhdr.reserved0 = *(long *)buf_p; buf_p += 4;
bhdr.bitmapDataOffset = *(long *)buf_p; buf_p += 4;
bhdr.bitmapHeaderSize = *(long *)buf_p; buf_p += 4;
bhdr.width = *(long *)buf_p; buf_p += 4;
bhdr.height = *(long *)buf_p; buf_p += 4;
bhdr.planes = *(short *)buf_p; buf_p += 2;
bhdr.bitsPerPixel = *(short *)buf_p; buf_p += 2;
bhdr.compression = *(long *)buf_p; buf_p += 4;
bhdr.bitmapDataSize = *(long *)buf_p; buf_p += 4;
bhdr.hRes = *(long *)buf_p; buf_p += 4;
bhdr.vRes = *(long *)buf_p; buf_p += 4;
bhdr.colors = *(long *)buf_p; buf_p += 4;
bhdr.importantColors = *(long *)buf_p; buf_p += 4;
// bogus file header check
if( bhdr.reserved0 != 0 ) return NULL;
if( bhdr.planes != 1 ) return NULL;
if( memcmp( bhdr.id, "BM", 2 ))
{
MsgDev( D_ERROR, "Image_LoadBMP: only Windows-style BMP files supported (%s)\n", name );
return NULL;
}
if( bhdr.bitmapHeaderSize != 0x28 )
{
MsgDev( D_ERROR, "Image_LoadBMP: invalid header size %i\n", bhdr.bitmapHeaderSize );
return NULL;
}
// bogus info header check
if( bhdr.fileSize != filesize )
{
// Sweet Half-Life issues. splash.bmp have bogus filesize
MsgDev( D_WARN, "Image_LoadBMP: %s have incorrect file size %i should be %i\n", name, filesize, bhdr.fileSize );
}
// bogus compression? Only non-compressed supported.
if( bhdr.compression != BI_RGB )
{
MsgDev( D_ERROR, "Image_LoadBMP: only uncompressed BMP files supported (%s)\n", name );
return false;
}
columns = bhdr.width;
rows = abs( bhdr.height );
if( !Image_ValidSize( name, columns, rows ))
return false;
pic = Image_Alloc( columns, rows );
if( bhdr.bitsPerPixel <= 8 )
{
// figure out how many entries are actually in the table
if( bhdr.colors == 0 )
{
bhdr.colors = 256;
cbPalBytes = (1 << bhdr.bitsPerPixel) * sizeof( RGBQUAD );
}
else cbPalBytes = bhdr.colors * sizeof( RGBQUAD );
}
memcpy( palette, buf_p, cbPalBytes );
buf_p += cbPalBytes;
bps = bhdr.width * (bhdr.bitsPerPixel >> 3);
switch( bhdr.bitsPerPixel )
{
case 1:
padSize = (( 32 - ( bhdr.width % 32 )) / 8 ) % 4;
break;
case 4:
padSize = (( 8 - ( bhdr.width % 8 )) / 2 ) % 4;
break;
case 16:
padSize = ( 4 - ( bhdr.width * 2 % 4 )) % 4;
break;
case 8:
case 24:
padSize = ( 4 - ( bps % 4 )) % 4;
break;
}
for( row = rows - 1; row >= 0; row-- )
{
pixbuf = pic->buffer + (row * columns * bpp);
for( column = 0; column < columns; column++ )
{
byte red, green, blue, alpha;
int c, k, palIndex;
word shortPixel;
switch( bhdr.bitsPerPixel )
{
case 1:
alpha = *buf_p++;
column--; // ingnore main iterations
for( c = 0, k = 128; c < 8; c++, k >>= 1 )
{
red = green = blue = (!!(alpha & k) == 1 ? 0xFF : 0x00);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 0x00;
if( ++column == columns )
break;
}
break;
case 4:
alpha = *buf_p++;
palIndex = alpha >> 4;
*pixbuf++ = red = palette[palIndex][2];
*pixbuf++ = green = palette[palIndex][1];
*pixbuf++ = blue = palette[palIndex][0];
*pixbuf++ = palette[palIndex][3];
if( ++column == columns ) break;
palIndex = alpha & 0x0F;
*pixbuf++ = red = palette[palIndex][2];
*pixbuf++ = green = palette[palIndex][1];
*pixbuf++ = blue = palette[palIndex][0];
*pixbuf++ = palette[palIndex][3];
break;
case 8:
palIndex = *buf_p++;
red = palette[palIndex][2];
green = palette[palIndex][1];
blue = palette[palIndex][0];
alpha = palette[palIndex][3];
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alpha;
break;
case 16:
shortPixel = *(word *)buf_p, buf_p += 2;
*pixbuf++ = blue = (shortPixel & ( 31 << 10 )) >> 7;
*pixbuf++ = green = (shortPixel & ( 31 << 5 )) >> 2;
*pixbuf++ = red = (shortPixel & ( 31 )) << 3;
*pixbuf++ = alpha = 0xff;
break;
case 24:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alpha = 0xFF;
break;
case 32:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alpha = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alpha;
break;
default:
MsgDev( D_ERROR, "Image_LoadBMP: illegal pixel_size (%s)\n", name );
Mem_Free( pic );
return NULL;
}
pic->reflectivity[0] += TextureToLinear( red );
pic->reflectivity[1] += TextureToLinear( green );
pic->reflectivity[2] += TextureToLinear( blue );
if(( red != green ) || ( green != blue ))
pic->flags |= IMAGE_HAS_COLOR;
if( alpha != 255 )
{
if( alpha != 0 )
{
SetBits( pic->flags, IMAGE_HAS_8BIT_ALPHA );
ClearBits( pic->flags, IMAGE_HAS_1BIT_ALPHA );
}
else if( !FBitSet( pic->flags, IMAGE_HAS_8BIT_ALPHA ))
SetBits( pic->flags, IMAGE_HAS_1BIT_ALPHA );
}
}
buf_p += padSize; // probably actual only for 4-bit bmps
}
VectorDivide( pic->reflectivity, ( pic->width * pic->height ), pic->reflectivity );
return pic;
}
/*
=============
Image_LoadDDS
=============
*/
rgbdata_t *Image_LoadDDS( const char *name, const byte *buffer, size_t filesize )
{
return DDSToRGBA( name, buffer, filesize );
}
/*
================
COM_LoadImage
handle bmp & tga
================
*/
rgbdata_t *COM_LoadImage( const char *filename, bool quiet )
{
const char *ext = COM_FileExtension( filename );
char path[128], loadname[128];
bool anyformat = true;
size_t filesize = 0;
const loadimage_t *format;
rgbdata_t *image;
byte *buf;
Q_strncpy( loadname, filename, sizeof( loadname ));
if( Q_stricmp( ext, "" ))
{
// we needs to compare file extension with list of supported formats
// and be sure what is real extension, not a filename with dot
for( format = load_hint; format && format->formatstring; format++ )
{
if( !Q_stricmp( format->ext, ext ))
{
COM_StripExtension( loadname );
anyformat = false;
break;
}
}
}
// now try all the formats in the selected list
for( format = load_hint; format && format->formatstring; format++ )
{
if( anyformat || !Q_stricmp( ext, format->ext ))
{
Q_sprintf( path, format->formatstring, loadname, "", format->ext );
#ifdef ALLOW_WADS_IN_PACKS
buf = FS_LoadFile( path, &filesize, false );
#else
buf = COM_LoadFile( path, &filesize );
#endif
if( buf && filesize > 0 )
{
image = format->loadfunc( path, buf, filesize );
Mem_Free( buf ); // release buffer
if( image ) return image; // loaded
}
}
}
if( !quiet )
MsgDev( D_ERROR, "COM_LoadImage: couldn't load \"%s\"\n", loadname );
return NULL;
}
/*
=============================================================================
IMAGE SAVING
=============================================================================
*/
/*
=============
Image_SaveTGA
=============
*/
bool Image_SaveTGA( const char *name, rgbdata_t *pix )
{
const char *comment = "Generated by XashNT MakeTex tool.\0";
int y, outsize, pixel_size = 4;
const byte *bufend, *in;
byte *buffer, *out;
if( COM_FileExists( name ))
return false; // already existed
// bogus parameter check
if( !pix->buffer )
return false;
if( pix->flags & IMAGE_HAS_ALPHA )
outsize = pix->width * pix->height * 4 + 18 + Q_strlen( comment );
else outsize = pix->width * pix->height * 3 + 18 + Q_strlen( comment );
buffer = (byte *)Mem_Alloc( outsize );
memset( buffer, 0, 18 );
// prepare header
buffer[0] = Q_strlen( comment ); // tga comment length
buffer[2] = 2; // uncompressed type
buffer[12] = (pix->width >> 0) & 0xFF;
buffer[13] = (pix->width >> 8) & 0xFF;
buffer[14] = (pix->height >> 0) & 0xFF;
buffer[15] = (pix->height >> 8) & 0xFF;
buffer[16] = ( pix->flags & IMAGE_HAS_ALPHA ) ? 32 : 24; // RGB pixel size
buffer[17] = ( pix->flags & IMAGE_HAS_ALPHA ) ? 8 : 0; // 8 bits of alpha
Q_strncpy( (char *)(buffer + 18), comment, Q_strlen( comment ));
out = buffer + 18 + Q_strlen( comment );
// swap rgba to bgra and flip upside down
for( y = pix->height - 1; y >= 0; y-- )
{
in = pix->buffer + y * pix->width * pixel_size;
bufend = in + pix->width * pixel_size;
for( ; in < bufend; in += pixel_size )
{
*out++ = in[2];
*out++ = in[1];
*out++ = in[0];
if( pix->flags & IMAGE_HAS_ALPHA )
*out++ = in[3];
}
}
COM_SaveFile( name, buffer, outsize );
Mem_Free( buffer );
return true;
}
bool Image_SaveBMP( const char *name, rgbdata_t *pix )
{
long file;
BITMAPFILEHEADER bmfh;
BITMAPINFOHEADER bmih;
dword cbBmpBits;
byte *pb, *pbBmpBits;
dword biTrueWidth;
int pixel_size;
int i, x, y;
if( COM_FileExists( name ))
return false; // already existed
// bogus parameter check
if( !pix->buffer )
return false;
if( FBitSet( pix->flags, IMAGE_HAS_ALPHA ))
pixel_size = 4;
else pixel_size = 3;
COM_CreatePath( (char *)name );
file = open( name, O_WRONLY|O_BINARY|O_CREAT|O_TRUNC, 0666 );
if( file < 0 ) return false;
// NOTE: align transparency column will sucessfully removed
// after create sprite or lump image, it's just standard requiriments
biTrueWidth = ((pix->width + 3) & ~3);
cbBmpBits = biTrueWidth * pix->height * pixel_size;
// Bogus file header check
bmfh.bfType = MAKEWORD( 'B', 'M' );
bmfh.bfSize = sizeof( bmfh ) + sizeof( bmih ) + cbBmpBits;
bmfh.bfOffBits = sizeof( bmfh ) + sizeof( bmih );
bmfh.bfReserved1 = bmfh.bfReserved2 = 0;
// write header
write( file, &bmfh, sizeof( bmfh ));
// size of structure
bmih.biSize = sizeof( bmih );
bmih.biWidth = biTrueWidth;
bmih.biHeight = pix->height;
bmih.biPlanes = 1;
bmih.biBitCount = pixel_size * 8;
bmih.biCompression = BI_RGB;
bmih.biSizeImage = cbBmpBits;
bmih.biXPelsPerMeter = 0;
bmih.biYPelsPerMeter = 0;
bmih.biClrUsed = 0;
bmih.biClrImportant = 0;
// write info header
write( file, &bmih, sizeof( bmih ));
pbBmpBits = (byte *)Mem_Alloc( cbBmpBits );
pb = pix->buffer;
for( y = 0; y < bmih.biHeight; y++ )
{
i = (bmih.biHeight - 1 - y ) * (bmih.biWidth);
for( x = 0; x < pix->width; x++ )
{
// 24 bit
pbBmpBits[i*pixel_size+0] = pb[x*4+2];
pbBmpBits[i*pixel_size+1] = pb[x*4+1];
pbBmpBits[i*pixel_size+2] = pb[x*4+0];
if( pixel_size == 4 ) // write alpha channel
pbBmpBits[i*pixel_size+3] = pb[x*4+3];
i++;
}
pb += pix->width * pixel_size;
}
// write bitmap bits (remainder of file)
write( file, pbBmpBits, cbBmpBits );
close( file );
Mem_Free( pbBmpBits );
return true;
}
/*
=============
Image_SaveDDS
=============
*/
bool Image_SaveDDS( const char *name, rgbdata_t *pix )
{
char lumpname[64];
rgbdata_t *dds_image = NULL;
if( COM_FileExists( name ))
return false; // already existed
// bogus parameter check
if( !pix->buffer )
return false;
// check for easy out
if( FBitSet( pix->flags, IMAGE_DXT_FORMAT ))
return COM_SaveFile( name, pix->buffer, pix->size );
COM_FileBase( name, lumpname );
char hint = Image_HintFromSuf( lumpname );
dds_image = BufferToDDS( pix, DDS_GetSaveFormatForHint( hint, pix ));
if( !dds_image ) return false;
bool result = COM_SaveFile( name, dds_image->buffer, dds_image->size );
Mem_Free( dds_image );
return result;
}
/*
================
COM_SaveImage
handle bmp & tga
================
*/
bool COM_SaveImage( const char *filename, rgbdata_t *pix )
{
const char *ext = COM_FileExtension( filename );
bool anyformat = !Q_stricmp( ext, "" ) ? true : false;
char path[128], savename[128];
const saveimage_t *format;
if( !pix || !pix->buffer || anyformat )
return false;
Q_strncpy( savename, filename, sizeof( savename ));
COM_StripExtension( savename ); // remove extension if needed
for( format = save_hint; format && format->formatstring; format++ )
{
if( !Q_stricmp( ext, format->ext ))
{
Q_sprintf( path, format->formatstring, savename, "", format->ext );
if( format->savefunc( path, pix ))
return true; // saved
}
}
MsgDev( D_ERROR, "COM_SaveImage: unsupported format (%s)\n", ext );
return false;
}
/*
=============================================================================
IMAGE PROCESSING
=============================================================================
*/
#define TRANSPARENT_R 0x0
#define TRANSPARENT_G 0x0
#define TRANSPARENT_B 0xFF
#define IS_TRANSPARENT( p ) ( p[0] == TRANSPARENT_R && p[1] == TRANSPARENT_G && p[2] == TRANSPARENT_B )
#define LERPBYTE( i ) r = resamplerow1[i]; out[i] = (byte)(((( resamplerow2[i] - r ) * lerp)>>16 ) + r )
static void Image_Resample32LerpLine( const byte *in, byte *out, int inwidth, int outwidth )
{
int j, xi, oldx = 0, f, fstep, endx, lerp;
fstep = (int)(inwidth * 65536.0f / outwidth);
endx = (inwidth-1);
for( j = 0, f = 0; j < outwidth; j++, f += fstep )
{
xi = f>>16;
if( xi != oldx )
{
in += (xi - oldx) * 4;
oldx = xi;
}
if( xi < endx )
{
lerp = f & 0xFFFF;
*out++ = (byte)((((in[4] - in[0]) * lerp)>>16) + in[0]);
*out++ = (byte)((((in[5] - in[1]) * lerp)>>16) + in[1]);
*out++ = (byte)((((in[6] - in[2]) * lerp)>>16) + in[2]);
*out++ = (byte)((((in[7] - in[3]) * lerp)>>16) + in[3]);
}
else // last pixel of the line has no pixel to lerp to
{
*out++ = in[0];
*out++ = in[1];
*out++ = in[2];
*out++ = in[3];
}
}
}
void Image_Resample32Lerp( const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight )
{
const byte *inrow;
int i, j, r, yi, oldy = 0, f, fstep, lerp, endy = (inheight - 1);
int inwidth4 = inwidth * 4;
int outwidth4 = outwidth * 4;
byte *out = (byte *)outdata;
byte *resamplerow1;
byte *resamplerow2;
fstep = (int)(inheight * 65536.0f / outheight);
resamplerow1 = (byte *)Mem_Alloc( outwidth * 4 * 2 );
resamplerow2 = resamplerow1 + outwidth * 4;
inrow = (const byte *)indata;
Image_Resample32LerpLine( inrow, resamplerow1, inwidth, outwidth );
Image_Resample32LerpLine( inrow + inwidth4, resamplerow2, inwidth, outwidth );
for( i = 0, f = 0; i < outheight; i++, f += fstep )
{
yi = f >> 16;
if( yi < endy )
{
lerp = f & 0xFFFF;
if( yi != oldy )
{
inrow = (byte *)indata + inwidth4 * yi;
if( yi == ( oldy + 1 )) memcpy( resamplerow1, resamplerow2, outwidth4 );
else Image_Resample32LerpLine( inrow, resamplerow1, inwidth, outwidth );
Image_Resample32LerpLine( inrow + inwidth4, resamplerow2, inwidth, outwidth );
oldy = yi;
}
j = outwidth - 4;
while( j >= 0 )
{
LERPBYTE( 0);
LERPBYTE( 1);
LERPBYTE( 2);
LERPBYTE( 3);
LERPBYTE( 4);
LERPBYTE( 5);
LERPBYTE( 6);
LERPBYTE( 7);
LERPBYTE( 8);
LERPBYTE( 9);
LERPBYTE(10);
LERPBYTE(11);
LERPBYTE(12);
LERPBYTE(13);
LERPBYTE(14);
LERPBYTE(15);
out += 16;
resamplerow1 += 16;
resamplerow2 += 16;
j -= 4;
}
if( j & 2 )
{
LERPBYTE( 0);
LERPBYTE( 1);
LERPBYTE( 2);
LERPBYTE( 3);
LERPBYTE( 4);
LERPBYTE( 5);
LERPBYTE( 6);
LERPBYTE( 7);
out += 8;
resamplerow1 += 8;
resamplerow2 += 8;
}
if( j & 1 )
{
LERPBYTE( 0);
LERPBYTE( 1);
LERPBYTE( 2);
LERPBYTE( 3);
out += 4;
resamplerow1 += 4;
resamplerow2 += 4;
}
resamplerow1 -= outwidth4;
resamplerow2 -= outwidth4;
}
else
{
if( yi != oldy )
{
inrow = (byte *)indata + inwidth4 * yi;
if( yi == ( oldy + 1 )) memcpy( resamplerow1, resamplerow2, outwidth4 );
else Image_Resample32LerpLine( inrow, resamplerow1, inwidth, outwidth );
oldy = yi;
}
memcpy( out, resamplerow1, outwidth4 );
}
}
Mem_Free( resamplerow1 );
}
/*
================
Image_Resample
================
*/
rgbdata_t *Image_Resample( rgbdata_t *pic, int new_width, int new_height )
{
if( !pic ) return NULL;
// nothing to resample ?
if( pic->width == new_width && pic->height == new_height )
return pic;
MsgDev( D_REPORT, "Image_Resample: from %ix%i to %ix%i\n", pic->width, pic->height, new_width, new_height );
rgbdata_t *out = Image_Alloc( new_width, new_height );
Image_Resample32Lerp( pic->buffer, pic->width, pic->height, out->buffer, out->width, out->height );
out->flags = pic->flags;
// release old image
Mem_Free( pic );
return out;
}
/*
================
Image_ExtractAlphaMask
we can't store alpha-channel into 8-bit texture
but we can store it separate as another image
================
*/
rgbdata_t *Image_ExtractAlphaMask( rgbdata_t *pic )
{
rgbdata_t *out;
if( !pic ) return NULL;
if( !FBitSet( pic->flags, IMAGE_HAS_ALPHA ))
return NULL; // no alpha-channel stored
out = Image_Copy( pic ); // duplicate the image
for( int i = 0; i < pic->width * pic->height; i++ )
{
// copy the alpha into color buffer
out->buffer[i*4+0] = pic->buffer[i*4+3];
out->buffer[i*4+1] = pic->buffer[i*4+3];
out->buffer[i*4+2] = pic->buffer[i*4+3];
out->buffer[i*4+3] = 0xFF; // clear the alpha
}
ClearBits( out->flags, IMAGE_HAS_COLOR );
ClearBits( out->flags, IMAGE_HAS_ALPHA );
return out;
}
/*
================
Image_ApplyGamma
we can't store alpha-channel into 8-bit texture
but we can store it separate as another image
================
*/
void Image_ApplyGamma( rgbdata_t *pic )
{
if( !pic || FBitSet( pic->flags, IMAGE_DXT_FORMAT ))
return; // can't process compressed image
for( int i = 0; i < pic->width * pic->height; i++ )
{
// copy the alpha into color buffer
pic->buffer[i*4+0] = TextureLightScale( pic->buffer[i*4+0] );
pic->buffer[i*4+1] = TextureLightScale( pic->buffer[i*4+1] );
pic->buffer[i*4+2] = TextureLightScale( pic->buffer[i*4+2] );
}
}
/*
================
Image_MergeColorAlpha
we can't store alpha-channel into 8-bit texture
but we can store it separate as another image
================
*/
rgbdata_t *Image_MergeColorAlpha( rgbdata_t *color, rgbdata_t *alpha )
{
rgbdata_t *int_alpha;
byte avalue;
if( !color ) return NULL;
if( !alpha ) return color;
if( FBitSet( color->flags, IMAGE_DXT_FORMAT ))
return color; // can't merge compressed formats
if( FBitSet( alpha->flags, IMAGE_DXT_FORMAT ))
return color; // can't merge compressed formats
int_alpha = Image_Copy( alpha ); // duplicate the image
if( color->width != alpha->width || color->height != alpha->height )
{
Image_Resample( int_alpha, color->width, color->height );
}
for( int i = 0; i < color->width * color->height; i++ )
{
// copy the alpha into color buffer (just use R instead?)
avalue = (int_alpha->buffer[i*4+0] + int_alpha->buffer[i*4+1] + int_alpha->buffer[i*4+2]) / 3;
if( avalue != 255 )
{
if( avalue != 0 )
{
SetBits( color->flags, IMAGE_HAS_8BIT_ALPHA );
ClearBits( color->flags, IMAGE_HAS_1BIT_ALPHA );
}
else if( !FBitSet( color->flags, IMAGE_HAS_8BIT_ALPHA ))
SetBits( color->flags, IMAGE_HAS_1BIT_ALPHA );
}
color->buffer[i*4+3] = avalue;
}
Mem_Free( int_alpha );
return color;
}
/*
================
Image_CreateCubemap
create cubemap from 6 images
images must be sorted in properly order
================
*/
rgbdata_t *Image_CreateCubemap( rgbdata_t *images[6], bool skybox, bool nomips )
{
rgbdata_t *out;
int base_width;
int base_height;
int i;
if( !images ) return NULL;
base_width = (images[0]->width + 15) & ~15;
base_height = (images[0]->height + 15) & ~15;
for( i = 0; i < 6; i++ )
{
// validate the sides
if( !images[i] || FBitSet( images[i]->flags, IMAGE_DXT_FORMAT|IMAGE_CUBEMAP|IMAGE_SKYBOX ))
break;
// rare case: cube sides with different dimensions
images[i] = Image_Resample( images[i], base_width, base_height );
}
if( i != 6 ) return NULL;
if( skybox )
out = Image_AllocSkybox( base_width, base_height );
else out = Image_AllocCubemap( base_width, base_height );
if( nomips ) SetBits( out->flags, IMAGE_NOMIPS );
// copy the sides
for( i = 0; i < 6; i++ )
{
VectorAdd( out->reflectivity, images[i]->reflectivity, out->reflectivity );
memcpy( out->buffer + (images[i]->size * i), images[i]->buffer, images[i]->size );
Mem_Free( images[i] ); // release original
}
// divide by sides count
VectorDivide( out->reflectivity, 6.0f, out->reflectivity );
return out;
}
/*
================
R_MipMap2
Operates in place, quartering the size of the texture
Proper linear filter
================
*/
static void Image_BuildMipMapLinear( uint *in, int inWidth, int inHeight )
{
int i, j, k;
byte *outpix;
int inWidthMask, inHeightMask;
int total;
int outWidth, outHeight;
uint *temp;
outWidth = inWidth >> 1;
outHeight = inHeight >> 1;
temp = (uint *)Mem_Alloc( outWidth * outHeight * 4 );
inWidthMask = inWidth - 1;
inHeightMask = inHeight - 1;
for( i = 0; i < outHeight; i++ )
{
for( j = 0; j < outWidth; j++ )
{
outpix = (byte *)(temp + i * outWidth + j);
for( k = 0; k < 4; k++ )
{
total =
1 * ((byte *)&in[((i * 2 - 1) & inHeightMask) * inWidth + ((j * 2 - 1) & inWidthMask)])[k] +
2 * ((byte *)&in[((i * 2 - 1) & inHeightMask) * inWidth + ((j * 2) & inWidthMask)])[k] +
2 * ((byte *)&in[((i * 2 - 1) & inHeightMask) * inWidth + ((j * 2 + 1) & inWidthMask)])[k] +
1 * ((byte *)&in[((i * 2 - 1) & inHeightMask) * inWidth + ((j * 2 + 2) & inWidthMask)])[k] +
2 * ((byte *)&in[((i * 2) & inHeightMask) * inWidth + ((j * 2 - 1) & inWidthMask)])[k] +
4 * ((byte *)&in[((i * 2) & inHeightMask) * inWidth + ((j * 2) & inWidthMask)])[k] +
4 * ((byte *)&in[((i * 2) & inHeightMask) * inWidth + ((j * 2 + 1) & inWidthMask)])[k] +
2 * ((byte *)&in[((i * 2) & inHeightMask) * inWidth + ((j * 2 + 2) & inWidthMask)])[k] +
2 * ((byte *)&in[((i * 2 + 1) & inHeightMask) * inWidth + ((j * 2 - 1) & inWidthMask)])[k] +
4 * ((byte *)&in[((i * 2 + 1) & inHeightMask) * inWidth + ((j * 2) & inWidthMask)])[k] +
4 * ((byte *)&in[((i * 2 + 1) & inHeightMask) * inWidth + ((j * 2 + 1) & inWidthMask)])[k] +
2 * ((byte *)&in[((i * 2 + 1) & inHeightMask) * inWidth + ((j * 2 + 2) & inWidthMask)])[k] +
1 * ((byte *)&in[((i * 2 + 2) & inHeightMask) * inWidth + ((j * 2 - 1) & inWidthMask)])[k] +
2 * ((byte *)&in[((i * 2 + 2) & inHeightMask) * inWidth + ((j * 2) & inWidthMask)])[k] +
2 * ((byte *)&in[((i * 2 + 2) & inHeightMask) * inWidth + ((j * 2 + 1) & inWidthMask)])[k] +
1 * ((byte *)&in[((i * 2 + 2) & inHeightMask) * inWidth + ((j * 2 + 2) & inWidthMask)])[k];
outpix[k] = total / 36;
}
}
}
memcpy( in, temp, outWidth * outHeight * 4 );
Mem_Free( temp );
}
/*
=================
Image_BuildMipMap
Operates in place, quartering the size of the texture
=================
*/
void Image_BuildMipMap( byte *in, int width, int height, bool isNormalMap )
{
byte *out = in;
float inv127 = (1.0f / 127.0f);
vec3_t normal;
int x, y;
if( isNormalMap )
{
width <<= 2;
height >>= 1;
for( y = 0; y < height; y++, in += width )
{
for( x = 0; x < width; x += 8, in += 8, out += 4 )
{
normal[0] = (in[0] * inv127 - 1.0f) + (in[4] * inv127 - 1.0f) + (in[width+0] * inv127 - 1.0f) + (in[width+4] * inv127 - 1.0f);
normal[1] = (in[1] * inv127 - 1.0f) + (in[5] * inv127 - 1.0f) + (in[width+1] * inv127 - 1.0f) + (in[width+5] * inv127 - 1.0f);
normal[2] = (in[2] * inv127 - 1.0f) + (in[6] * inv127 - 1.0f) + (in[width+2] * inv127 - 1.0f) + (in[width+6] * inv127 - 1.0f);
if( VectorNormalize( normal ) == 0.0f )
VectorSet( normal, 0.5f, 0.5f, 1.0f );
out[0] = (byte)(128 + 127 * normal[0]);
out[1] = (byte)(128 + 127 * normal[1]);
out[2] = (byte)(128 + 127 * normal[2]);
out[3] = 255;
}
}
}
else
{
#if 0
Image_BuildMipMapLinear( (uint *)in, width, height );
#else
width <<= 2;
height >>= 1;
for( y = 0; y < height; y++, in += width )
{
for( x = 0; x < width; x += 8, in += 8, out += 4 )
{
out[0] = (in[0] + in[4] + in[width+0] + in[width+4]) >> 2;
out[1] = (in[1] + in[5] + in[width+1] + in[width+5]) >> 2;
out[2] = (in[2] + in[6] + in[width+2] + in[width+6]) >> 2;
out[3] = (in[3] + in[7] + in[width+3] + in[width+7]) >> 2;
}
}
#endif
}
}
/*
================
Image_ConvertBumpStalker
convert stalker bump into normal textures
================
*/
void Image_ConvertBumpStalker( rgbdata_t *bump, rgbdata_t *spec )
{
if( !bump || !spec || bump->width != spec->width || bump->height != spec->height )
return; // we need both the textures to processing
for( int i = 0; i < bump->width * bump->height; i++ )
{
byte bump_rgba[4], spec_rgba[4];
vec3_t normal, error;
byte temp[4];
memcpy( bump_rgba, bump->buffer + (i * 4), sizeof( bump_rgba ));
memcpy( spec_rgba, spec->buffer + (i * 4), sizeof( bump_rgba ));
normal[0] = (float)bump_rgba[3] * (1.0f / 255.0f); // alpha is X
normal[1] = (float)bump_rgba[2] * (1.0f / 255.0f); // blue is Y
normal[2] = (float)bump_rgba[1] * (1.0f / 255.0f); // green is Z
error[0] = (float)spec_rgba[0] * (1.0f / 255.0f); // alpha is X
error[1] = (float)spec_rgba[1] * (1.0f / 255.0f); // blue is Y
error[2] = (float)spec_rgba[2] * (1.0f / 255.0f); // green is Z
// compensate normal error
VectorAdd( normal, error, normal );
normal[0] -= 1.0f;
normal[1] -= 1.0f;
normal[2] -= 1.0f;
VectorNormalize( normal );
// store back to byte
temp[0] = (byte)(normal[0] * 127.0f + 128.0f);
temp[1] = (byte)(normal[1] * 127.0f + 128.0f);
temp[2] = (byte)(normal[2] * 127.0f + 128.0f);
temp[3] = 0;
// put transformed pixel back to the buffer
memcpy( bump->buffer + (i * 4), temp, sizeof( temp ));
// store glossiness
temp[0] = bump_rgba[0];
temp[1] = bump_rgba[0];
temp[2] = bump_rgba[0];
temp[3] = spec_rgba[3]; // store heightmap into alpha
// put transformed pixel back to the buffer
memcpy( spec->buffer + (i * 4), temp, sizeof( temp ));
}
}
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