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Paranoia2_original/utils/makewad/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 "makewad.h"
#include "mathlib.h"
// using to detect quake1 textures and possible to convert luma
static const byte palette_q1[768] =
{
0,0,0,15,15,15,31,31,31,47,47,47,63,63,63,75,75,75,91,91,91,107,107,107,123,123,123,139,139,139,155,155,155,171,
171,171,187,187,187,203,203,203,219,219,219,235,235,235,15,11,7,23,15,11,31,23,11,39,27,15,47,35,19,55,43,23,63,
47,23,75,55,27,83,59,27,91,67,31,99,75,31,107,83,31,115,87,31,123,95,35,131,103,35,143,111,35,11,11,15,19,19,27,
27,27,39,39,39,51,47,47,63,55,55,75,63,63,87,71,71,103,79,79,115,91,91,127,99,99,139,107,107,151,115,115,163,123,
123,175,131,131,187,139,139,203,0,0,0,7,7,0,11,11,0,19,19,0,27,27,0,35,35,0,43,43,7,47,47,7,55,55,7,63,63,7,71,71,
7,75,75,11,83,83,11,91,91,11,99,99,11,107,107,15,7,0,0,15,0,0,23,0,0,31,0,0,39,0,0,47,0,0,55,0,0,63,0,0,71,0,0,79,
0,0,87,0,0,95,0,0,103,0,0,111,0,0,119,0,0,127,0,0,19,19,0,27,27,0,35,35,0,47,43,0,55,47,0,67,55,0,75,59,7,87,67,7,
95,71,7,107,75,11,119,83,15,131,87,19,139,91,19,151,95,27,163,99,31,175,103,35,35,19,7,47,23,11,59,31,15,75,35,19,
87,43,23,99,47,31,115,55,35,127,59,43,143,67,51,159,79,51,175,99,47,191,119,47,207,143,43,223,171,39,239,203,31,255,
243,27,11,7,0,27,19,0,43,35,15,55,43,19,71,51,27,83,55,35,99,63,43,111,71,51,127,83,63,139,95,71,155,107,83,167,123,
95,183,135,107,195,147,123,211,163,139,227,179,151,171,139,163,159,127,151,147,115,135,139,103,123,127,91,111,119,
83,99,107,75,87,95,63,75,87,55,67,75,47,55,67,39,47,55,31,35,43,23,27,35,19,19,23,11,11,15,7,7,187,115,159,175,107,
143,163,95,131,151,87,119,139,79,107,127,75,95,115,67,83,107,59,75,95,51,63,83,43,55,71,35,43,59,31,35,47,23,27,35,
19,19,23,11,11,15,7,7,219,195,187,203,179,167,191,163,155,175,151,139,163,135,123,151,123,111,135,111,95,123,99,83,
107,87,71,95,75,59,83,63,51,67,51,39,55,43,31,39,31,23,27,19,15,15,11,7,111,131,123,103,123,111,95,115,103,87,107,
95,79,99,87,71,91,79,63,83,71,55,75,63,47,67,55,43,59,47,35,51,39,31,43,31,23,35,23,15,27,19,11,19,11,7,11,7,255,
243,27,239,223,23,219,203,19,203,183,15,187,167,15,171,151,11,155,131,7,139,115,7,123,99,7,107,83,0,91,71,0,75,55,
0,59,43,0,43,31,0,27,15,0,11,7,0,0,0,255,11,11,239,19,19,223,27,27,207,35,35,191,43,43,175,47,47,159,47,47,143,47,
47,127,47,47,111,47,47,95,43,43,79,35,35,63,27,27,47,19,19,31,11,11,15,43,0,0,59,0,0,75,7,0,95,7,0,111,15,0,127,23,
7,147,31,7,163,39,11,183,51,15,195,75,27,207,99,43,219,127,59,227,151,79,231,171,95,239,191,119,247,211,139,167,123,
59,183,155,55,199,195,55,231,227,87,127,191,255,171,231,255,215,255,255,103,0,0,139,0,0,179,0,0,215,0,0,255,0,0,255,
243,147,255,247,199,255,255,255,159,91,83
};
// 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
{ NULL, 0 } // terminator
};
/*
=================
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 * (paletted ? 1 : 4)) + (paletted ? 1024 : 0);
rgbdata_t *pic = (rgbdata_t *)Mem_Alloc( pic_size );
if( paletted )
{
pic->buffer = ((byte *)pic) + sizeof( rgbdata_t );
pic->palette = ((byte *)pic) + sizeof( rgbdata_t ) + width * height;
pic->flags |= IMAGE_QUANTIZED;
}
else
{
pic->buffer = ((byte *)pic) + sizeof( rgbdata_t );
pic->palette = NULL; // not present
}
pic->size = (width * height * (paletted ? 1 : 4));
pic->width = width;
pic->height = height;
return pic;
}
/*
=================
Image_Copy
make an copy of image
=================
*/
rgbdata_t *Image_Copy( rgbdata_t *src )
{
rgbdata_t *dst = Image_Alloc( src->width, src->height, FBitSet( src->flags, IMAGE_QUANTIZED ));
if( FBitSet( src->flags, IMAGE_QUANTIZED ))
memcpy( dst->palette, src->palette, 1024 );
memcpy( dst->buffer, src->buffer, src->size );
dst->size = src->size;
dst->width = src->width;
dst->height = src->height;
dst->flags = src->flags;
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;
}
/*
=============================================================================
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;
bool paletted;
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;
}
}
paletted = ( targa_header.image_type == 1 || targa_header.image_type == 9 );
pic = Image_Alloc( targa_header.width, targa_header.height, paletted );
if( paletted ) memcpy( pic->palette, palette, sizeof( palette ));
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
{
if( FBitSet( pic->flags, IMAGE_QUANTIZED ))
{
pixbuf = targa_rgba + ( rows - 1 ) * columns;
row_inc = -columns * 2;
}
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 );
}
if( FBitSet( pic->flags, IMAGE_QUANTIZED ))
{
*pixbuf++ = palIndex;
}
else
{
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alpha;
}
if( ++col == columns )
{
// run spans across rows
row++;
col = 0;
pixbuf += row_inc;
}
}
}
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 i, columns, column, rows, row, bpp = 1;
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, ( bhdr.bitsPerPixel == 8 ));
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 );
if( bhdr.bitsPerPixel == 8 )
{
pixbuf = pic->palette;
// bmp have a reversed palette colors
for( i = 0; i < bhdr.colors; i++ )
{
*pixbuf++ = palette[i][2];
*pixbuf++ = palette[i][1];
*pixbuf++ = palette[i][0];
*pixbuf++ = palette[i][3];
if( palette[i][0] != palette[i][1] || palette[i][1] != palette[i][2] )
pic->flags |= IMAGE_HAS_COLOR;
}
}
else bpp = 4;
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];
if( FBitSet( pic->flags, IMAGE_QUANTIZED ))
{
*pixbuf++ = palIndex;
}
else
{
*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;
}
if( !FBitSet( pic->flags, IMAGE_QUANTIZED ) && ( 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
}
return pic;
}
/*
=============
Image_LoadMIP
just read header
=============
*/
rgbdata_t *Image_LoadMIP( const char *name, const byte *buffer, size_t filesize )
{
char tmpname[64];
if( filesize < sizeof( mip_t ))
return NULL;
mip_t *mip = (mip_t *)buffer;
if( !Image_ValidSize( name, mip->width, mip->height ))
return NULL;
int pixels = mip->width * mip->height;
if( filesize < ( sizeof( mip_t ) + (( pixels * 85 ) >> 6 ) + sizeof( short ) + 768 ))
{
MsgDev( D_ERROR, "Image_LoadMIP: %s probably corrupted\n", name );
return NULL;
}
rgbdata_t *pic = Image_Alloc( mip->width, mip->height, true );
memcpy( pic->buffer, buffer + mip->offsets[0], pixels );
byte *pal = (byte *)buffer + mip->offsets[0] + (((mip->width * mip->height) * 85)>>6);
int numcolors = *(short *)pal;
if( numcolors != 256 ) MsgDev( D_WARN, "Image_LoadMIP: %s invalid palette num colors %i\n", name, numcolors );
pal += sizeof( short ); // skip colorsize
// expand palette
for( int i = 0; i < 256; i++ )
{
pic->palette[i*4+0] = *pal++;
pic->palette[i*4+1] = *pal++;
pic->palette[i*4+2] = *pal++;
pic->palette[i*4+3] = 255;
if( pic->palette[i*4+0] != pic->palette[i*4+1] || pic->palette[i*4+1] != pic->palette[i*4+2] )
pic->flags |= IMAGE_HAS_COLOR;
}
// check for one-bit alpha
COM_FileBase( name, tmpname );
if( tmpname[0] == '{' && pic->palette[255*3+0] == 0 && pic->palette[255*3+1] == 0 && pic->palette[255*3+2] == 255 )
pic->flags |= IMAGE_HAS_1BIT_ALPHA;
return pic;
}
/*
=============
Image_LoadLMP
just read header
=============
*/
rgbdata_t *Image_LoadLMP( const char *name, const byte *buffer, size_t filesize )
{
if( filesize < sizeof( lmp_t ))
return NULL;
lmp_t *lmp = (lmp_t *)buffer;
if( !Image_ValidSize( name, lmp->width, lmp->height ))
return NULL;
int pixels = lmp->width * lmp->height;
if( filesize < ( sizeof( lmp_t ) + pixels + sizeof( short ) + 768 ))
{
MsgDev( D_ERROR, "Image_LoadLMP: %s probably corrupted\n", name );
return NULL;
}
rgbdata_t *pic = Image_Alloc( lmp->width, lmp->height, true );
memcpy( pic->buffer, buffer + sizeof( lmp_t ), pixels );
byte *pal = (byte *)buffer + sizeof( lmp_t ) + pixels;
int numcolors = *(short *)pal;
if( numcolors != 256 ) MsgDev( D_WARN, "Image_LoadLMP: %s invalid palette num colors %i\n", name, numcolors );
pal += sizeof( short ); // skip colorsize
// expand palette
for( int i = 0; i < 256; i++ )
{
pic->palette[i*4+0] = *pal++;
pic->palette[i*4+1] = *pal++;
pic->palette[i*4+2] = *pal++;
pic->palette[i*4+3] = 255;
if( pic->palette[i*4+0] != pic->palette[i*4+1] || pic->palette[i*4+1] != pic->palette[i*4+2] )
pic->flags |= IMAGE_HAS_COLOR;
}
// always has the alpha
pic->flags |= IMAGE_HAS_1BIT_ALPHA;
return pic;
}
/*
================
COM_LoadImage
handle bmp & tga
================
*/
rgbdata_t *COM_LoadImage( const char *filename, bool quiet )
{
size_t fileSize;
byte *buf = (byte *)COM_LoadFile( filename, &fileSize, false );
const char *ext = COM_FileExtension( filename );
rgbdata_t *pic = NULL;
char barename[64];
if( !buf && source_wad != NULL )
{
COM_FileBase( filename, barename );
buf = W_LoadLump( source_wad, barename, &fileSize, W_TypeFromExt( filename ));
}
if( !buf )
{
if( !quiet )
MsgDev( D_ERROR, "COM_LoadImage: unable to load (%s)\n", filename );
return NULL;
}
if( !Q_stricmp( ext, "tga" ))
pic = Image_LoadTGA( filename, buf, fileSize );
else if( !Q_stricmp( ext, "bmp" ))
pic = Image_LoadBMP( filename, buf, fileSize );
else if( !Q_stricmp( ext, "mip" ))
pic = Image_LoadMIP( filename, buf, fileSize );
else if( !Q_stricmp( ext, "lmp" ))
pic = Image_LoadLMP( filename, buf, fileSize );
else if( !quiet )
MsgDev( D_ERROR, "COM_LoadImage: unsupported format (%s)\n", ext );
Mem_Free( buf ); // release file
if( pic != NULL )
{
// check for quake1 palette
if( FBitSet( pic->flags, IMAGE_QUANTIZED ) && pic->palette != NULL )
{
byte src[256*3];
// first we need to turn palette into 768 bytes
for( int i = 0; i < 256; i++ )
{
src[i*3+0] = pic->palette[i*4+0];
src[i*3+1] = pic->palette[i*4+1];
src[i*3+2] = pic->palette[i*4+2];
}
if( !memcmp( src, palette_q1, sizeof( src )))
SetBits( pic->flags, IMAGE_QUAKE1_PAL );
}
}
return pic; // may be NULL
}
/*
=============================================================================
IMAGE SAVING
=============================================================================
*/
/*
=============
Image_SaveTGA
=============
*/
bool Image_SaveTGA( const char *name, rgbdata_t *pix )
{
const char *comment = "Generated by XashNT MakeWad tool.\0";
int i, 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( FBitSet( pix->flags, IMAGE_QUANTIZED ))
{
outsize = pix->width * pix->height + 18 + Q_strlen( comment );
}
else
{
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 );
}
if( FBitSet( pix->flags, IMAGE_QUANTIZED ))
outsize += 768; // palette
buffer = (byte *)Mem_Alloc( outsize );
memset( buffer, 0, 18 );
// prepare header
buffer[0] = Q_strlen( comment ); // tga comment length
if( FBitSet( pix->flags, IMAGE_QUANTIZED ))
{
buffer[1] = 1; // color map type
buffer[2] = 1; // uncompressed color mapped image
buffer[5] = 0; // number of palette entries (lo)
buffer[6] = 1; // number of palette entries (hi)
buffer[7] = 24; // palette bpp
}
else 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;
if( !FBitSet( pix->flags, IMAGE_QUANTIZED ))
{
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
}
else buffer[16] = 8; // pixel size
Q_strncpy( (char *)(buffer + 18), comment, Q_strlen( comment ));
out = buffer + 18 + Q_strlen( comment );
// store palette, swapping rgb to bgr
if( FBitSet( pix->flags, IMAGE_QUANTIZED ))
{
for( i = 0; i < 256; i++ )
{
*out++ = pix->palette[i*4+2]; // blue
*out++ = pix->palette[i*4+1]; // green
*out++ = pix->palette[i*4+0]; // red
}
// store the image data (and flip upside down)
for( y = pix->height - 1; y >= 0; y-- )
{
in = pix->buffer + y * pix->width;
bufend = in + pix->width;
for( ; in < bufend; in++ )
*out++ = *in;
}
}
else
{
// 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;
RGBQUAD rgrgbPalette[256];
dword cbBmpBits;
byte *pb, *pbBmpBits;
dword cbPalBytes = 0;
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_QUANTIZED ))
pixel_size = 1;
else pixel_size = 4;
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;
if( pixel_size == 1 ) cbPalBytes = 256 * sizeof( RGBQUAD );
// Bogus file header check
bmfh.bfType = MAKEWORD( 'B', 'M' );
bmfh.bfSize = sizeof( bmfh ) + sizeof( bmih ) + cbBmpBits + cbPalBytes;
bmfh.bfOffBits = sizeof( bmfh ) + sizeof( bmih ) + cbPalBytes;
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 = ( pixel_size == 1 ) ? 256 : 0;
bmih.biClrImportant = 0;
// write info header
write( file, &bmih, sizeof( bmih ));
pbBmpBits = (byte *)Mem_Alloc( cbBmpBits );
if( pixel_size == 1 )
{
pb = pix->palette;
// copy over used entries
for( i = 0; i < (int)bmih.biClrUsed; i++ )
{
rgrgbPalette[i].rgbRed = *pb++;
rgrgbPalette[i].rgbGreen = *pb++;
rgrgbPalette[i].rgbBlue = *pb++;
rgrgbPalette[i].rgbReserved = *pb++;
}
// write palette
write( file, rgrgbPalette, cbPalBytes );
}
pb = pix->buffer;
for( y = 0; y < bmih.biHeight; y++ )
{
i = (bmih.biHeight - 1 - y ) * (bmih.biWidth);
for( x = 0; x < pix->width; x++ )
{
if( pixel_size == 1 )
{
// 8-bit
pbBmpBits[i] = pb[x];
}
else
{
// 24 bit
pbBmpBits[i*pixel_size+0] = pb[x*pixel_size+2];
pbBmpBits[i*pixel_size+1] = pb[x*pixel_size+1];
pbBmpBits[i*pixel_size+2] = pb[x*pixel_size+0];
}
if( pixel_size == 4 ) // write alpha channel
pbBmpBits[i*pixel_size+3] = pb[x*pixel_size+3];
i++;
}
pb += pix->width * pixel_size;
}
// write bitmap bits (remainder of file)
write( file, pbBmpBits, cbBmpBits );
close( file );
Mem_Free( pbBmpBits );
return true;
}
/*
================
COM_SaveImage
handle bmp & tga
================
*/
bool COM_SaveImage( const char *filename, rgbdata_t *pix )
{
const char *ext = COM_FileExtension( filename );
if( !pix )
{
MsgDev( D_ERROR, "COM_SaveImage: pix == NULL\n" );
return false;
}
if( !Q_stricmp( ext, "tga" ))
return Image_SaveTGA( filename, pix );
else if( !Q_stricmp( ext, "bmp" ))
return Image_SaveBMP( filename, pix );
else if( !Q_stricmp( ext, "lmp" ))
return LMP_WriteLmptex( filename, pix, true );
else
{
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 );
}
void Image_Resample8Nolerp( const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight )
{
int i, j;
byte *in, *inrow;
size_t frac, fracstep;
byte *out = (byte *)outdata;
in = (byte *)indata;
fracstep = inwidth * 0x10000 / outwidth;
for( i = 0; i < outheight; i++, out += outwidth )
{
inrow = in + inwidth * (i * inheight / outheight);
frac = fracstep >> 1;
for( j = 0; j < outwidth; j++ )
{
out[j] = inrow[frac>>16];
frac += fracstep;
}
}
}
/*
================
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, FBitSet( pic->flags, IMAGE_QUANTIZED ));
if( FBitSet( pic->flags, IMAGE_QUANTIZED ))
Image_Resample8Nolerp( pic->buffer, pic->width, pic->height, out->buffer, out->width, out->height );
else Image_Resample32Lerp( pic->buffer, pic->width, pic->height, out->buffer, out->width, out->height );
// copy remaining data from source
if( FBitSet( pic->flags, IMAGE_QUANTIZED ))
memcpy( out->palette, pic->palette, 1024 );
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_QUANTIZED ))
return NULL; // can extract only from RGBA buffer
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_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|alpha->flags, IMAGE_QUANTIZED ))
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_MakeOneBitAlpha
remap all pixels of color 0, 0, 255 to index 255
and remap index 255 to something else
==============
*/
void Image_MakeOneBitAlpha( rgbdata_t *pic )
{
byte transtable[256], *buf;
int i, j, firsttrans = -1;
if( !pic ) return;
if( !FBitSet( pic->flags, IMAGE_QUANTIZED ))
return; // only for quantized images
// don't move colors in quake palette!
if( FBitSet( pic->flags, IMAGE_QUAKE1_PAL ))
{
// needs for software mip generator
SetBits( pic->flags, IMAGE_HAS_1BIT_ALPHA );
return;
}
for( i = 0; i < 256; i++ )
{
if( IS_TRANSPARENT(( pic->palette + ( i * 4 ))))
{
transtable[i] = 255;
if( firsttrans < 0 )
firsttrans = i;
}
else transtable[i] = i;
}
// if there is some transparency, translate it
if( firsttrans >= 0 )
{
if( !IS_TRANSPARENT(( pic->palette + ( 255 * 4 ))))
transtable[255] = firsttrans;
buf = pic->buffer;
for( j = 0; j < pic->height; j++ )
{
for( i = 0; i < pic->width; i++ )
{
*buf = transtable[*buf];
buf++;
}
}
// move palette entry for pixels previously mapped to entry 255
pic->palette[firsttrans*4+0] = pic->palette[255*4+0];
pic->palette[firsttrans*4+1] = pic->palette[255*4+1];
pic->palette[firsttrans*4+2] = pic->palette[255*4+2];
pic->palette[firsttrans*4+3] = pic->palette[255*4+3];
pic->palette[255*4+0] = TRANSPARENT_R;
pic->palette[255*4+1] = TRANSPARENT_G;
pic->palette[255*4+2] = TRANSPARENT_B;
pic->palette[255*4+3] = 0xFF;
}
// needs for software mip generator
SetBits( pic->flags, IMAGE_HAS_1BIT_ALPHA );
}
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