ComponentFactory.Krypton.Toolkit.RenderStandard.DrawRibbonAppButton C# (CSharp) Method

        protected virtual IDisposable DrawRibbonAppButton(PaletteRibbonShape shape,
                                                          RenderContext context,
                                                          Rectangle rect,
                                                          PaletteState state,
                                                          IPaletteRibbonBack palette,
                                                          bool trackBorderAsPressed,
                                                          IDisposable memento)
        {
            // Reduce the area of the actual button as the extra space is used for shadow
            rect.Width -= 3;
            rect.Height -= 3;

            if ((rect.Width > 0) && (rect.Height > 0))
            {
                // Get the colors from the palette
                Color topLight = palette.GetRibbonBackColor1(state);
                Color topMedium = palette.GetRibbonBackColor2(state);
                Color topDark = palette.GetRibbonBackColor3(state);
                Color bottomLight = palette.GetRibbonBackColor4(state);
                Color bottomMedium = palette.GetRibbonBackColor5(state);
                Color bottomDark = CommonHelper.MergeColors(topDark, 0.78f, Color.Empty, 0.22f);

                bool generate = true;
                MementoRibbonAppButton cache;

                // Access a cache instance and decide if cache resources need generating
                if ((memento == null) || !(memento is MementoRibbonAppButton))
                {
                    if (memento != null)
                        memento.Dispose();

                    cache = new MementoRibbonAppButton(rect, topLight, topMedium,
                                                       topDark, bottomLight, bottomMedium);
                    memento = cache;
                }
                else
                {
                    cache = (MementoRibbonAppButton)memento;
                    generate = !cache.UseCachedValues(rect, topLight, topMedium,
                                                      topDark, bottomLight, bottomMedium);
                }

                // Do we need to generate the contents of the cache?
                if (generate)
                {
                    // Dispose of existing values
                    cache.Dispose();

                    cache.borderShadow1 = new RectangleF(rect.X, rect.Y, rect.Width + 2, rect.Height + 2);
                    cache.borderShadow2 = new RectangleF(rect.X, rect.Y, rect.Width + 1, rect.Height + 1);
                    cache.borderMain1 = new RectangleF(rect.X + 1, rect.Y + 1, rect.Width - 2, rect.Height - 2);
                    cache.borderMain2 = new RectangleF(cache.borderMain1.X + 1, cache.borderMain1.Y + 1, cache.borderMain1.Width - 2, cache.borderMain1.Height - 2);
                    cache.borderMain3 = new RectangleF(cache.borderMain1.X + 1, cache.borderMain1.Y + 1, cache.borderMain1.Width - 2, cache.borderMain1.Height - 2);
                    cache.borderMain4 = new RectangleF(cache.borderMain2.X, cache.borderMain2.Y + 1, cache.borderMain2.Width, cache.borderMain2.Height - 2);
                    cache.rectBottomGlow = new RectangleF(0, 0, rect.Width * 0.75f, rect.Height * 0.75f);
                    cache.rectLower = new RectangleF(rect.X, rect.Y - 1, rect.Width, rect.Height + 1);
                    cache.rectUpperGlow = new RectangleF();
                    cache.rectUpperGlow.Width = rect.Width - 4;
                    cache.rectUpperGlow.Height = rect.Height / 8;
                    cache.rectUpperGlow.Y = rect.Y + (rect.Height - cache.rectUpperGlow.Height) / 2;
                    cache.rectUpperGlow.X = rect.X + (rect.Width - cache.rectUpperGlow.Width) / 2;

                    cache.brushUpper1 = new LinearGradientBrush(rect, Color.Transparent, Color.Transparent, LinearGradientMode.Horizontal);
                    cache.brushLower = new LinearGradientBrush(cache.rectLower, Color.Transparent, Color.Transparent, LinearGradientMode.Horizontal);
                }

                using (AntiAlias aa = new AntiAlias(context.Graphics))
                {
                    DrawRibbonAppButtonBorder1(context.Graphics, cache);
                    DrawRibbonAppButtonUpperHalf(context.Graphics, cache, state, topDark, bottomDark, topLight, topMedium, trackBorderAsPressed);
                    DrawRibbonAppButtonLowerHalf(context.Graphics, cache, state, bottomDark, bottomLight, bottomMedium);
                    DrawRibbonAppButtonGlowCenter(context.Graphics, cache, state, topLight, bottomLight);
                    DrawRibbonAppButtonGlowUpperBottom(context.Graphics, cache, state, bottomLight, bottomMedium, bottomDark);
                    DrawRibbonAppButtonBorder2(context.Graphics, cache, state, bottomLight, trackBorderAsPressed);
                }
            }

            return memento;
        }