System.Drawing.TextureBrush.ResetTransform C# (CSharp) Method

        public void ResetTransform()
        {
            textureTransform.Reset();
            changed = true;
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);

            bool linkBroken = this.ReferenceBroken;

            Color bgColorBright = Color.White;
            if (this.dragHover) bgColorBright = bgColorBright.MixWith(Color.FromArgb(192, 255, 0), 0.4f);
            else if (this.multiple) bgColorBright = Color.Bisque;
            else if (linkBroken) bgColorBright = Color.FromArgb(255, 128, 128);

            bool darkBg = false;
            Rectangle rectImage = new Rectangle(this.rectPanel.X + 2, this.rectPanel.Y + 2, this.rectPanel.Width - 4, this.rectPanel.Height - 4);
            if (this.prevImage == null)
            {
                if (this.ReadOnly || !this.Enabled)
                    e.Graphics.FillRectangle(new SolidBrush(Color.FromArgb(64, bgColorBright)), rectImage);
                else
                    e.Graphics.FillRectangle(new SolidBrush(bgColorBright), rectImage);
            }
            else
            {
                Color brightChecker = this.prevImageLum > 0.5f ? Color.FromArgb(48, 48, 48) : Color.FromArgb(224, 224, 224);
                Color darkChecker = this.prevImageLum > 0.5f ? Color.FromArgb(32, 32, 32) : Color.FromArgb(192, 192, 192);

                if (this.dragHover)
                {
                    brightChecker = brightChecker.MixWith(Color.FromArgb(192, 255, 0), 0.4f);
                    darkChecker = darkChecker.MixWith(Color.FromArgb(192, 255, 0), 0.4f);
                }
                else if (this.multiple)
                {
                    brightChecker = brightChecker.MixWith(Color.FromArgb(255, 200, 128), 0.4f);
                    darkChecker = darkChecker.MixWith(Color.FromArgb(255, 200, 128), 0.4f);
                }
                else if (linkBroken)
                {
                    brightChecker = brightChecker.MixWith(Color.FromArgb(255, 128, 128), 0.4f);
                    darkChecker = darkChecker.MixWith(Color.FromArgb(255, 128, 128), 0.4f);
                }

                e.Graphics.FillRectangle(new HatchBrush(HatchStyle.LargeCheckerBoard, brightChecker, darkChecker), rectImage);

                TextureBrush bgImageBrush = new TextureBrush(this.prevImage);
                bgImageBrush.ResetTransform();
                bgImageBrush.TranslateTransform(rectImage.X, rectImage.Y);
                e.Graphics.FillRectangle(bgImageBrush, rectImage);

                darkBg = this.prevImageLum > 0.5f;
                if (this.ReadOnly || !this.Enabled)
                {
                    e.Graphics.FillRectangle(new SolidBrush(Color.FromArgb(128, SystemColors.Control)), rectImage);
                    darkBg = (this.prevImageLum + SystemColors.Control.GetLuminance()) * 0.5f < 0.5f;
                }
            }

            StringFormat format = StringFormat.GenericDefault;
            format.Alignment = StringAlignment.Center;
            format.LineAlignment = StringAlignment.Center;
            format.Trimming = StringTrimming.EllipsisPath;
            SizeF textSize = e.Graphics.MeasureString(
                this.ReferenceName ?? "null",
                SystemFonts.DefaultFont,
                new SizeF(this.rectPanel.Width, this.rectPanel.Height),
                format);

            Rectangle rectText;
            if (this.prevImage == null)
                rectText = this.rectPanel;
            else
                rectText = new Rectangle(
                    this.rectPanel.X, this.rectPanel.Bottom - (int)textSize.Height - 2, this.rectPanel.Width, (int)textSize.Height);

            if (this.prevImage != null)
            {
                e.Graphics.FillRectangle(new SolidBrush(Color.FromArgb(192, bgColorBright)),
                    rectText.X + rectText.Width / 2 - textSize.Width / 2 - 1,
                    rectText.Y + rectText.Height / 2 - textSize.Height / 2 - 2,
                    textSize.Width + 1,
                    textSize.Height + 2);
            }
            e.Graphics.DrawString(
                this.ReferenceName ?? "null",
                SystemFonts.DefaultFont,
                new SolidBrush(this.Enabled ? SystemColors.ControlText : SystemColors.GrayText),
                rectText,
                format);

            ControlRenderer.DrawBorder(e.Graphics,
                this.rectPanel,
                BorderStyle.ContentBox,
                (this.ReadOnly || !this.Enabled) ? BorderState.Disabled : BorderState.Normal);

            ButtonState buttonStateSet = ButtonState.Disabled;
            if(!this.ReadOnly && this.Enabled)
            {
                if (this.buttonSetPressed) buttonStateSet = ButtonState.Pressed;
                else if (this.buttonSetHovered) buttonStateSet = ButtonState.Hot;
                else buttonStateSet = ButtonState.Normal;
            }
            ControlRenderer.DrawButton(
                e.Graphics,
                this.rectButtonSet,
                buttonStateSet,
                null,
                iconSet);

            ButtonState buttonStateReset = ButtonState.Disabled;
            if (!this.ReadOnly && this.Enabled && this.ReferenceName != null)
            {
                if (this.buttonResetPressed)		buttonStateReset = ButtonState.Pressed;
                else if (this.buttonResetHovered)	buttonStateReset = ButtonState.Hot;
                else								buttonStateReset = ButtonState.Normal;
            }
            ControlRenderer.DrawButton(
                e.Graphics,
                this.rectButtonReset,
                buttonStateReset,
                null,
                iconReset);

            ButtonState buttonStateShow = ButtonState.Disabled;
            if (this.Enabled && this.ReferenceName != null)
            {
                if (this.buttonShowPressed)							buttonStateShow = ButtonState.Pressed;
                else if (this.buttonShowHovered || this.Focused)	buttonStateShow = ButtonState.Hot;
                else												buttonStateShow = ButtonState.Normal;
            }
            ControlRenderer.DrawButton(
                e.Graphics,
                this.rectButtonShow,
                buttonStateShow,
                null,
                iconShow);
        }