Function ClampTexels

Source/Graphics/TextureTransform.cpp:78–126

template< typename T >
static void ClampTexels( void * texels, u32 n64_width, u32 n64_height, u32 native_width, u32 native_height, u32 native_stride )
{
	#ifdef DAEDALUS_ENABLE_ASSERTS
	DAEDALUS_ASSERT( native_stride >= native_width * sizeof( T ), "Native stride isn't big enough" );
	DAEDALUS_ASSERT( n64_width <= native_width, "n64 width greater than native width?" );
	DAEDALUS_ASSERT( n64_height <= native_height, "n64 height greater than native height?" );
	#endif

	T * data = reinterpret_cast< T * >( texels );

	//
	//	If any of the rows are short, we need to duplicate the last pixel on the row
	//	Stick this in an outer predicate incase they match
	//
	if( native_width > n64_width )
	{
		for( u32 y {}; y < n64_height; ++y )
		{
			T	colour( data[ n64_width - 1 ] );

			for( u32 x = n64_width; x < native_width; ++x )
			{
				data[ x ] = colour;
			}

			data = AddByteOffset( data, native_stride );
		}
	}
	else
	{
		data = AddByteOffset( data, n64_height * native_stride );
	}

	//
	//	At this point all the rows up to the n64 height have been padded out.
	//	We need to duplicate the last row for every additional native row.
	//
	if( native_height > n64_height )
	{
		const void * last_row {AddByteOffset( texels, ( n64_height - 1 ) * native_stride )};

		for( u32 y = n64_height; y < native_height; ++y )
		{
			memcpy( data, last_row, native_stride );

			data = AddByteOffset( data, native_stride );
		}
	}
}

template<>
void ClampTexels< NativePfCI44 >( void * texels, u32 n64_width, u32 n64_height, u32 native_width, u32 native_height, u32 native_stride )