mirror of
https://github.com/w23/xash3d-fwgs
synced 2024-12-16 14:10:11 +01:00
332 lines
7.9 KiB
C
332 lines
7.9 KiB
C
/*
|
|
img_dds.c - dds format load
|
|
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 "imagelib.h"
|
|
#include "mathlib.h"
|
|
|
|
qboolean Image_CheckDXT3Alpha( dds_t *hdr, byte *fin )
|
|
{
|
|
uint bitmask;
|
|
word sAlpha;
|
|
byte *alpha;
|
|
int x, y, i, j;
|
|
|
|
for( y = 0; y < hdr->dwHeight; y += 4 )
|
|
{
|
|
for( x = 0; x < hdr->dwWidth; x += 4 )
|
|
{
|
|
alpha = fin;
|
|
fin += 8;
|
|
bitmask = ((uint *)fin)[1];
|
|
fin += 8;
|
|
|
|
for( j = 0; j < 4; j++ )
|
|
{
|
|
sAlpha = alpha[2*j] + 256 * alpha[2*j+1];
|
|
|
|
for( i = 0; i < 4; i++ )
|
|
{
|
|
if((( x + i ) < hdr->dwWidth ) && (( y + j ) < hdr->dwHeight ))
|
|
{
|
|
if( sAlpha == 0 )
|
|
return true;
|
|
}
|
|
sAlpha >>= 4;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
qboolean Image_CheckDXT5Alpha( dds_t *hdr, byte *fin )
|
|
{
|
|
uint bits, bitmask;
|
|
byte *alphamask;
|
|
int x, y, i, j;
|
|
|
|
for( y = 0; y < hdr->dwHeight; y += 4 )
|
|
{
|
|
for( x = 0; x < hdr->dwWidth; x += 4 )
|
|
{
|
|
if( y >= hdr->dwHeight || x >= hdr->dwWidth )
|
|
break;
|
|
|
|
alphamask = fin + 2;
|
|
fin += 8;
|
|
|
|
bitmask = ((uint *)fin)[1];
|
|
fin += 8;
|
|
|
|
// last three bytes
|
|
bits = (alphamask[3]) | (alphamask[4] << 8) | (alphamask[5] << 16);
|
|
|
|
for( j = 2; j < 4; j++ )
|
|
{
|
|
for( i = 0; i < 4; i++ )
|
|
{
|
|
// only put pixels out < width or height
|
|
if((( x + i ) < hdr->dwWidth ) && (( y + j ) < hdr->dwHeight ))
|
|
{
|
|
if( bits & 0x07 )
|
|
return true;
|
|
}
|
|
bits >>= 3;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void Image_DXTGetPixelFormat( dds_t *hdr )
|
|
{
|
|
uint bits = hdr->dsPixelFormat.dwRGBBitCount;
|
|
|
|
if( !FBitSet( hdr->dsCaps.dwCaps2, DDS_VOLUME ))
|
|
hdr->dwDepth = 1;
|
|
|
|
if( FBitSet( hdr->dsPixelFormat.dwFlags, DDS_FOURCC ))
|
|
{
|
|
switch( hdr->dsPixelFormat.dwFourCC )
|
|
{
|
|
case TYPE_DXT1:
|
|
image.type = PF_DXT1;
|
|
break;
|
|
case TYPE_DXT2:
|
|
image.flags &= ~IMAGE_HAS_ALPHA; // alpha is already premultiplied by color
|
|
case TYPE_DXT3:
|
|
image.type = PF_DXT3;
|
|
break;
|
|
case TYPE_DXT4:
|
|
image.flags &= ~IMAGE_HAS_ALPHA; // alpha is already premultiplied by color
|
|
case TYPE_DXT5:
|
|
image.type = PF_DXT5;
|
|
break;
|
|
case TYPE_ATI2:
|
|
image.type = PF_ATI2;
|
|
break;
|
|
default:
|
|
image.type = PF_UNKNOWN; // assume error
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// this dds texture isn't compressed so write out ARGB or luminance format
|
|
if( hdr->dsPixelFormat.dwFlags & DDS_DUDV )
|
|
{
|
|
image.type = PF_UNKNOWN; // assume error
|
|
}
|
|
else if( hdr->dsPixelFormat.dwFlags & DDS_LUMINANCE )
|
|
{
|
|
image.type = PF_UNKNOWN; // assume error
|
|
}
|
|
else
|
|
{
|
|
if( bits == 32 )
|
|
image.type = PF_BGRA_32;
|
|
else if( bits == 24 )
|
|
image.type = PF_BGR_24;
|
|
else image.type = PF_UNKNOWN; // assume error;
|
|
}
|
|
}
|
|
|
|
// setup additional flags
|
|
if( hdr->dsCaps.dwCaps1 & DDS_COMPLEX && hdr->dsCaps.dwCaps2 & DDS_CUBEMAP )
|
|
image.flags |= IMAGE_CUBEMAP;
|
|
|
|
if( hdr->dwFlags & DDS_MIPMAPCOUNT )
|
|
image.num_mips = hdr->dwMipMapCount; // get actual mip count
|
|
}
|
|
|
|
size_t Image_DXTGetLinearSize( int type, int width, int height, int depth )
|
|
{
|
|
switch( type )
|
|
{
|
|
case PF_DXT1: return ((( width + 3 ) / 4 ) * (( height + 3 ) / 4 ) * depth * 8 );
|
|
case PF_DXT3:
|
|
case PF_DXT5:
|
|
case PF_ATI2: return ((( width + 3 ) / 4 ) * (( height + 3 ) / 4 ) * depth * 16 );
|
|
case PF_BGR_24:
|
|
case PF_RGB_24: return (width * height * depth * 3);
|
|
case PF_BGRA_32:
|
|
case PF_RGBA_32: return (width * height * depth * 4);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
size_t Image_DXTCalcMipmapSize( dds_t *hdr )
|
|
{
|
|
size_t buffsize = 0;
|
|
int i, width, height;
|
|
|
|
// now correct buffer size
|
|
for( i = 0; i < Q_max( 1, ( hdr->dwMipMapCount )); i++ )
|
|
{
|
|
width = Q_max( 1, ( hdr->dwWidth >> i ));
|
|
height = Q_max( 1, ( hdr->dwHeight >> i ));
|
|
buffsize += Image_DXTGetLinearSize( image.type, width, height, image.depth );
|
|
}
|
|
|
|
return buffsize;
|
|
}
|
|
|
|
uint Image_DXTCalcSize( const char *name, dds_t *hdr, size_t filesize )
|
|
{
|
|
size_t buffsize = 0;
|
|
int w = image.width;
|
|
int h = image.height;
|
|
int d = image.depth;
|
|
|
|
if( hdr->dsCaps.dwCaps2 & DDS_CUBEMAP )
|
|
{
|
|
// cubemap w*h always match for all sides
|
|
buffsize = Image_DXTCalcMipmapSize( hdr ) * 6;
|
|
}
|
|
else if( hdr->dwFlags & DDS_MIPMAPCOUNT )
|
|
{
|
|
// if mipcount > 1
|
|
buffsize = Image_DXTCalcMipmapSize( hdr );
|
|
}
|
|
else if( hdr->dwFlags & ( DDS_LINEARSIZE|DDS_PITCH ))
|
|
{
|
|
// just in case (no need, really)
|
|
buffsize = hdr->dwLinearSize;
|
|
}
|
|
else
|
|
{
|
|
// pretty solution for microsoft bug
|
|
buffsize = Image_DXTCalcMipmapSize( hdr );
|
|
}
|
|
|
|
if( filesize != buffsize ) // main check
|
|
{
|
|
Con_DPrintf( S_WARN "Image_LoadDDS: (%s) probably corrupted (%i should be %i)\n", name, buffsize, filesize );
|
|
if( buffsize > filesize )
|
|
return false;
|
|
}
|
|
|
|
return buffsize;
|
|
}
|
|
|
|
void Image_DXTAdjustVolume( dds_t *hdr )
|
|
{
|
|
if( hdr->dwDepth <= 1 )
|
|
return;
|
|
|
|
hdr->dwLinearSize = Image_DXTGetLinearSize( image.type, hdr->dwWidth, hdr->dwHeight, hdr->dwDepth );
|
|
hdr->dwFlags |= DDS_LINEARSIZE;
|
|
}
|
|
|
|
/*
|
|
=============
|
|
Image_LoadDDS
|
|
=============
|
|
*/
|
|
qboolean Image_LoadDDS( const char *name, const byte *buffer, size_t filesize )
|
|
{
|
|
dds_t header;
|
|
byte *fin;
|
|
|
|
if( filesize < sizeof( dds_t ))
|
|
return false;
|
|
|
|
memcpy( &header, buffer, sizeof( dds_t ));
|
|
|
|
if( header.dwIdent != DDSHEADER )
|
|
return false; // it's not a dds file, just skip it
|
|
|
|
if( header.dwSize != sizeof( dds_t ) - sizeof( uint )) // size of the structure (minus MagicNum)
|
|
{
|
|
Con_DPrintf( S_ERROR "Image_LoadDDS: (%s) have corrupted header\n", name );
|
|
return false;
|
|
}
|
|
|
|
if( header.dsPixelFormat.dwSize != sizeof( dds_pixf_t )) // size of the structure
|
|
{
|
|
Con_DPrintf( S_ERROR "Image_LoadDDS: (%s) have corrupt pixelformat header\n", name );
|
|
return false;
|
|
}
|
|
|
|
image.width = header.dwWidth;
|
|
image.height = header.dwHeight;
|
|
|
|
if( header.dwFlags & DDS_DEPTH )
|
|
image.depth = header.dwDepth;
|
|
else image.depth = 1;
|
|
|
|
if( !Image_ValidSize( name )) return false;
|
|
|
|
Image_DXTGetPixelFormat( &header ); // and image type too :)
|
|
Image_DXTAdjustVolume( &header );
|
|
|
|
if( !Image_CheckFlag( IL_DDS_HARDWARE ) && ImageDXT( image.type ))
|
|
return false; // silently rejected
|
|
|
|
if( image.type == PF_UNKNOWN )
|
|
{
|
|
Con_DPrintf( S_ERROR "Image_LoadDDS: (%s) has unrecognized type\n", name );
|
|
return false;
|
|
}
|
|
|
|
image.size = Image_DXTCalcSize( name, &header, filesize - 128 );
|
|
if( image.size == 0 ) return false; // just in case
|
|
fin = (byte *)(buffer + sizeof( dds_t ));
|
|
|
|
// copy an encode method
|
|
image.encode = (word)header.dwReserved1[0];
|
|
|
|
switch( image.encode )
|
|
{
|
|
case DXT_ENCODE_COLOR_YCoCg:
|
|
SetBits( image.flags, IMAGE_HAS_COLOR );
|
|
break;
|
|
case DXT_ENCODE_NORMAL_AG_ORTHO:
|
|
case DXT_ENCODE_NORMAL_AG_STEREO:
|
|
case DXT_ENCODE_NORMAL_AG_PARABOLOID:
|
|
case DXT_ENCODE_NORMAL_AG_QUARTIC:
|
|
case DXT_ENCODE_NORMAL_AG_AZIMUTHAL:
|
|
SetBits( image.flags, IMAGE_HAS_COLOR );
|
|
break;
|
|
default: // check for real alpha-pixels
|
|
if( image.type == PF_DXT3 && Image_CheckDXT3Alpha( &header, fin ))
|
|
SetBits( image.flags, IMAGE_HAS_ALPHA );
|
|
else if( image.type == PF_DXT5 && Image_CheckDXT5Alpha( &header, fin ))
|
|
SetBits( image.flags, IMAGE_HAS_ALPHA );
|
|
if( !FBitSet( header.dsPixelFormat.dwFlags, DDS_LUMINANCE ))
|
|
SetBits( image.flags, IMAGE_HAS_COLOR );
|
|
break;
|
|
}
|
|
|
|
if( header.dwReserved1[1] != 0 )
|
|
{
|
|
// store texture reflectivity
|
|
image.fogParams[0] = ((header.dwReserved1[1] & 0x000000FF) >> 0 );
|
|
image.fogParams[1] = ((header.dwReserved1[1] & 0x0000FF00) >> 8 );
|
|
image.fogParams[2] = ((header.dwReserved1[1] & 0x00FF0000) >> 16);
|
|
image.fogParams[3] = ((header.dwReserved1[1] & 0xFF000000) >> 24);
|
|
}
|
|
|
|
// dds files will be uncompressed on a render. requires minimal of info for set this
|
|
image.rgba = Mem_Malloc( host.imagepool, image.size );
|
|
memcpy( image.rgba, fin, image.size );
|
|
SetBits( image.flags, IMAGE_DDS_FORMAT );
|
|
|
|
return true;
|
|
} |