コード例 #1
0
ファイル: FontFace.cs プロジェクト: ywscr/CSharpGL2
        /// <summary>
        /// Renders the glyph to the given surface.
        /// </summary>
        /// <param name="surface">The target surface.</param>
        /// <remarks>
        /// If the surface is not large enough, the glyph will be clipped to fit.
        /// </remarks>
        public void RenderTo(Surface surface)
        {
            // check for an empty outline, which obviously results in an empty render
            if (points.Length <= 0 || contours.Length <= 0)
            {
                return;
            }

            // clip against the bounds of the target surface
            var width  = Math.Min(RenderWidth, surface.Width);
            var height = Math.Min(RenderHeight, surface.Height);

            if (width <= 0 || height <= 0)
            {
                return;
            }

            // walk each contour of the outline and render it
            var firstIndex = 0;

            renderer.Start(width, height);
            for (int i = 0; i < contours.Length; i++)
            {
                // decompose the contour into drawing commands
                var lastIndex = contours[i];
                Geometry.DecomposeContour(renderer, firstIndex, lastIndex, points);

                // next contour starts where this one left off
                firstIndex = lastIndex + 1;
            }

            // blit the result to the target surface
            renderer.BlitTo(surface);
        }