Method LoadFloorsTextures

PanzerChasm/client/map_drawer_gl.cpp:843–890

}

void MapDrawerGL::LoadFloorsTextures( const MapData& map_data )
{
	const Palette& palette= game_resources_->palette;

	const unsigned int texture_texels= MapData::c_floor_texture_size * MapData::c_floor_texture_size;

	glBindTexture( GL_TEXTURE_2D_ARRAY, floor_textures_array_id_ );
	glTexImage3D(
		GL_TEXTURE_2D_ARRAY, 0, GL_RGBA8,
		MapData::c_floor_texture_size, MapData::c_floor_texture_size, MapData::c_floors_textures_count,
		0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr );

	for( unsigned int t= 0u; t < MapData::c_floors_textures_count; t++ )
	{
		const unsigned char* const in_data= map_data.floor_textures_data[t];

		unsigned char texture_data[ 4u * texture_texels ];

		for( unsigned int i= 0u; i < texture_texels; i++ )
		{
			const unsigned char color_index= in_data[i];
			for( unsigned int j= 0u; j < 3u; j++ )
				texture_data[ (i << 2u) + j ]= palette[ color_index * 3u + j ];
			texture_data[ (i << 2u) + 3u ]= 255u;
		}

		glTexSubImage3D(
			GL_TEXTURE_2D_ARRAY, 0,
			0, 0, t,
			MapData::c_floor_texture_size, MapData::c_floor_texture_size, 1,
			GL_RGBA, GL_UNSIGNED_BYTE,
			texture_data );

	} // for textures

	if( filter_textures_ )
	{
		glTexParameteri( GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
		glTexParameteri( GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR );
	}
	else
	{
		glTexParameteri( GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
		glTexParameteri( GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_LINEAR );
	}

	glGenerateMipmap( GL_TEXTURE_2D_ARRAY );
}

void MapDrawerGL::LoadWallsTextures( const MapData& map_data )
{