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Code Issues 2 Projects Releases Wiki Activity

engine: imagelib: fix possible NULL dereference

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This commit is contained in:
Alibek Omarov 2024-04-04 18:40:43 +03:00
parent c896425ad9
commit fed65dd497
1 changed files with 32 additions and 29 deletions
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61
engine/common/imagelib/img_wad.c
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@ -390,7 +390,7 @@ qboolean Image_LoadMIP( const char *name, const byte *buffer, fs_offset_t filesi
if( Q_strrchr( name, '{' ))
{
// NOTE: decals with 'blue base' can be interpret as colored decals
if( !Image_CheckFlag( IL_LOAD_DECAL ) || ( pal[765] == 0 && pal[766] == 0 && pal[767] == 255 ))
if( !Image_CheckFlag( IL_LOAD_DECAL ) || ( pal && pal[765] == 0 && pal[766] == 0 && pal[767] == 255 ))
{
SetBits( image.flags, IMAGE_ONEBIT_ALPHA );
rendermode = LUMP_MASKED;
@ -488,37 +488,40 @@ qboolean Image_LoadMIP( const char *name, const byte *buffer, fs_offset_t filesi
}
// check for half-life water texture
if( hl_texture && ( mip.name[0] == '!' || !Q_strnicmp( mip.name, "water", 5 )))
if( pal != NULL )
{
// grab the fog color
image.fogParams[0] = pal[3*3+0];
image.fogParams[1] = pal[3*3+1];
image.fogParams[2] = pal[3*3+2];
// grab the fog density
image.fogParams[3] = pal[4*3+0];
}
else if( hl_texture && ( rendermode == LUMP_GRADIENT ))
{
// grab the decal color
image.fogParams[0] = pal[255*3+0];
image.fogParams[1] = pal[255*3+1];
image.fogParams[2] = pal[255*3+2];
// calc the decal reflectivity
image.fogParams[3] = VectorAvg( image.fogParams );
}
else if( pal != NULL )
{
// calc texture reflectivity
for( i = 0; i < 256; i++ )
if( hl_texture && ( mip.name[0] == '!' || !Q_strnicmp( mip.name, "water", 5 )))
{
reflectivity[0] += pal[i*3+0];
reflectivity[1] += pal[i*3+1];
reflectivity[2] += pal[i*3+2];
}
// grab the fog color
image.fogParams[0] = pal[3*3+0];
image.fogParams[1] = pal[3*3+1];
image.fogParams[2] = pal[3*3+2];
VectorDivide( reflectivity, 256, image.fogParams );
// grab the fog density
image.fogParams[3] = pal[4*3+0];
}
else if( hl_texture && ( rendermode == LUMP_GRADIENT ))
{
// grab the decal color
image.fogParams[0] = pal[255*3+0];
image.fogParams[1] = pal[255*3+1];
image.fogParams[2] = pal[255*3+2];
// calc the decal reflectivity
image.fogParams[3] = VectorAvg( image.fogParams );
}
else
{
// calc texture reflectivity
for( i = 0; i < 256; i++ )
{
reflectivity[0] += pal[i*3+0];
reflectivity[1] += pal[i*3+1];
reflectivity[2] += pal[i*3+2];
}
VectorDivide( reflectivity, 256, image.fogParams );
}
}
image.type = PF_INDEXED_32; // 32-bit palete