Code-Bin #987

untitled C++ Code
Posted by: Shane | November 29, 2010 @ 8:28pm

C++ Code

png_voidp __cdecl PngAlloc( png_structp, png_alloc_size_t size )
	{
		return g_engineHeap.Alloc( size, __FILE__, __LINE__ );
	}
	void __cdecl PngFree( png_structp, png_voidp ptr )
	{
		wfHeap::Free( ptr );
	}
	void __cdecl PngRead( png_structp pngPtr, png_bytep data, png_size_t length )
	{
		u8* src = reinterpret_cast< u8* >( pngPtr->io_ptr );
		memcpy( data, src, length );
		pngPtr->io_ptr = src + length;
	}

u32* data = new( g_engineHeap )u32[ m_header.m_width * m_header.m_height ];

png_structp png = png_create_read_struct_2( PNG_LIBPNG_VER_STRING, NULL, NULL, NULL, NULL, PngAlloc, PngFree );
		png_infop pngInfo = png_create_info_struct( png );
		png_set_read_fn( png, rawData, PngRead );

u32* dst = data;
		png_bytepp rows = new( g_engineHeap )png_bytep[ m_header.m_height ];
		for( s32 rowIdx = 0; rowIdx != m_header.m_height; ++rowIdx )
		{
			rows[ rowIdx ] = reinterpret_cast< png_bytep >( dst );
			dst += m_header.m_width;
		}
		png_set_rows( png, pngInfo, rows );
#ifdef WF_PC32
		png_read_png( png, pngInfo, PNG_TRANSFORM_BGR, NULL );
#else
		png_read_png( png, pngInfo, PNG_TRANSFORM_SWAP_ALPHA, NULL );
#endif
		delete[] rows;
		
		png_destroy_read_struct( &png, &pngInfo, NULL );

return reinterpret_cast< u8* >( data );

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