Method DrawLoading

PanzerChasm/menu_drawer_gl.cpp:605–678

}

void MenuDrawerGL::DrawLoading( const float progress )
{
	const float progress_corrected= std::min( std::max( progress, 0.0f ), 1.0f );

	Vertex vertices[ 8u ];

	const int scale= int( menu_scale_ );
	const int x0= ( int(viewport_size_.Width ()) - int(loading_texture_.Width()) * scale ) / 2;
	const int mid_tc= int( std::round( float(loading_texture_.Width()) * progress_corrected ) );
	const int x1= x0 + scale * mid_tc;
	const int y= ( int(viewport_size_.Height()) - int(loading_texture_.Height()) / 2 * scale ) / 2;

	vertices[0].xy[0]= x0;
	vertices[0].xy[1]= y;
	vertices[0].tex_coord[0]= 0;
	vertices[0].tex_coord[1]= loading_texture_.Height ();

	vertices[1].xy[0]= x1;
	vertices[1].xy[1]= y;
	vertices[1].tex_coord[0]= mid_tc;
	vertices[1].tex_coord[1]= loading_texture_.Height();

	vertices[2].xy[0]= x1;
	vertices[2].xy[1]= y + int(loading_texture_.Height() >> 1u) * scale;
	vertices[2].tex_coord[0]= mid_tc;
	vertices[2].tex_coord[1]= loading_texture_.Height () >> 1u;

	vertices[3].xy[0]= x0;
	vertices[3].xy[1]= y + int(loading_texture_.Height() >> 1u) * scale;
	vertices[3].tex_coord[0]= 0;
	vertices[3].tex_coord[1]= loading_texture_.Height () >> 1u;

	vertices[4].xy[0]= x1;
	vertices[4].xy[1]= y;
	vertices[4].tex_coord[0]= mid_tc;
	vertices[4].tex_coord[1]= loading_texture_.Height () >> 1u;

	vertices[5].xy[0]= x0 + int(loading_texture_.Width()) * scale;
	vertices[5].xy[1]= y;
	vertices[5].tex_coord[0]= loading_texture_.Width ();
	vertices[5].tex_coord[1]= loading_texture_.Height() >> 1u;

	vertices[6].xy[0]= x0 + int(loading_texture_.Width()) * scale;
	vertices[6].xy[1]= y + int(loading_texture_.Height() >> 1u) * scale;
	vertices[6].tex_coord[0]= loading_texture_.Width ();
	vertices[6].tex_coord[1]= 0;

	vertices[7].xy[0]= x1;
	vertices[7].xy[1]= y + int(loading_texture_.Height() >> 1u) * scale;
	vertices[7].tex_coord[0]= mid_tc;
	vertices[7].tex_coord[1]= 0;

	polygon_buffer_.VertexSubData( vertices , sizeof(vertices), 0u );

	// Draw
	r_OGLStateManager::UpdateState( g_gl_state );

	menu_picture_shader_.Bind();