Пример #1
0
        /// <summary>
        /// Creates waveform image.
        /// Length of level arrays can be less then number of render frames for a partial render.
        /// </summary>
        private static Bitmap CreateWaveformImage(WaveformDirection direction, WaveformSideOrientation sideOrientation,
                                                  int width, int height, float peakValue, int numFullRenderFrames,
                                                  float[] leftLevelArr, float[] rightLevelArr,
                                                  Brush leftSideBrush, Brush rightSideBrush, Brush centerLineBrush)
        {
            // Perform argument checks.
            if (width <= 0)
            {
                throw new ArgumentException("Width is not positive.", "width");
            }
            if (height <= 0)
            {
                throw new ArgumentException("Height is not positive.", "height");
            }
            if (leftLevelArr.Length != rightLevelArr.Length)
            {
                throw new ArgumentException("Left and right level array is not of the same length.", "rightRenderLevelArr");
            }

            if (direction == WaveformDirection.LeftToRight || direction == WaveformDirection.RightToLeft)
            {
                // ~~ Left to right or right to left.
                return(CreateHorizontalWaveformImage(direction, sideOrientation,
                                                     width, height, peakValue, numFullRenderFrames,
                                                     leftLevelArr, rightLevelArr,
                                                     leftSideBrush, rightSideBrush, centerLineBrush));
            }
            else
            {
                // ~~ Top to bottom or bottom to top.
                return(CreateVerticalWaveformImage(direction, sideOrientation,
                                                   width, height, peakValue, numFullRenderFrames,
                                                   leftLevelArr, rightLevelArr,
                                                   leftSideBrush, rightSideBrush, centerLineBrush));
            }
        }
Пример #2
0
        /// <summary>
        /// Creates waveform image.
        /// Length of level arrays can be less then number of render frames for a partial render.
        /// </summary>
        private static Bitmap CreateHorizontalWaveformImage(WaveformDirection direction, WaveformSideOrientation sideOrientation,
                                                            int width, int height, float peakValue, int numFullRenderFrames,
                                                            float[] leftLevelArr, float[] rightLevelArr,
                                                            Brush leftSideBrush, Brush rightSideBrush, Brush centerLineBrush)
        {
            int    numRenderFrames = leftLevelArr.Length;
            bool   isPartialRender = numRenderFrames < numFullRenderFrames;
            double frameThickness  = 1d * width / numFullRenderFrames;
            double sideHeight      = height / 2d;
            double centerLineY     = (height - 1) / 2;

            PointF[] topPointArr    = new PointF[numRenderFrames + 3];
            PointF[] bottomPointArr = new PointF[numRenderFrames + 3];

            // Change peak value if partial render.
            if (isPartialRender)
            {
                peakValue = Math.Max(1f, peakValue);
            }

            // Make sure peakValue != 0 to avoid division by zero.
            if (peakValue == 0)
            {
                peakValue = 1f;
            }

            // Add start points.
            if (direction == WaveformDirection.LeftToRight)
            {
                // ~~ Left to right.
                topPointArr[0]    = new PointF(0f, (float)centerLineY);
                bottomPointArr[0] = new PointF(0f, (float)centerLineY);
            }
            else
            {
                // ~~ Right to left.
                topPointArr[0]    = new PointF(width - 1, (float)centerLineY);
                bottomPointArr[0] = new PointF(width - 1, (float)centerLineY);
            }

            double xLocation = -1d;

            // Add main points.
            for (int i = 0; i < numRenderFrames; i++)
            {
                if (direction == WaveformDirection.LeftToRight)
                {
                    // ~~ Left to right.
                    xLocation = (i * frameThickness + (i + 1) * frameThickness) / 2;
                }
                else
                {
                    // ~~ Right to left.
                    xLocation = width - 1 - ((i * frameThickness + (i + 1) * frameThickness) / 2);
                }

                double topRenderHeight, bottomRenderHeight;

                if (sideOrientation == WaveformSideOrientation.LeftSideOnTopOrLeft)
                {
                    // ~~ Left side on top, right side on bottom.
                    topRenderHeight    = 1d * leftLevelArr[i] / peakValue * sideHeight;
                    bottomRenderHeight = 1d * rightLevelArr[i] / peakValue * sideHeight;
                }
                else
                {
                    // ~~ Left side on bottom, right side on top.
                    topRenderHeight    = 1d * rightLevelArr[i] / peakValue * sideHeight;
                    bottomRenderHeight = 1d * leftLevelArr[i] / peakValue * sideHeight;
                }

                topPointArr[i + 1]    = new PointF((float)xLocation, (float)(centerLineY - topRenderHeight));
                bottomPointArr[i + 1] = new PointF((float)xLocation, (float)(centerLineY + bottomRenderHeight));
            }

            // Add end points.
            if (direction == WaveformDirection.LeftToRight)
            {
                // ~~ Left to right.
                if (isPartialRender)
                {
                    // Draw straight towards line, not to end point.
                    topPointArr[numRenderFrames + 1]    = new PointF((float)xLocation, (float)centerLineY);
                    bottomPointArr[numRenderFrames + 1] = new PointF((float)xLocation, (float)centerLineY);
                }
                else
                {
                    // Draw to end point.
                    topPointArr[numRenderFrames + 1]    = new PointF(width - 1, (float)centerLineY);
                    bottomPointArr[numRenderFrames + 1] = new PointF(width - 1, (float)centerLineY);
                }
                topPointArr[numRenderFrames + 2]    = new PointF(0, (float)centerLineY);
                bottomPointArr[numRenderFrames + 2] = new PointF(0, (float)centerLineY);
            }
            else
            {
                // ~~ Right to left.
                if (isPartialRender)
                {
                    // Draw straight towards line, not to end point.
                    topPointArr[numRenderFrames + 1]    = new PointF((float)xLocation, (float)centerLineY);
                    bottomPointArr[numRenderFrames + 1] = new PointF((float)xLocation, (float)centerLineY);
                }
                else
                {
                    // Draw to end point.
                    topPointArr[numRenderFrames + 1]    = new PointF(0, (float)centerLineY);
                    bottomPointArr[numRenderFrames + 1] = new PointF(0, (float)centerLineY);
                }
                topPointArr[numRenderFrames + 2]    = new PointF(width - 1, (float)centerLineY);
                bottomPointArr[numRenderFrames + 2] = new PointF(width - 1, (float)centerLineY);
            }

            // Create bitmap.
            Bitmap bm = new Bitmap(width, height);

            using (Graphics g = Graphics.FromImage(bm))
            {
                g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

                // Draw left and right waveform.
                if (sideOrientation == WaveformSideOrientation.LeftSideOnTopOrLeft)
                {
                    // ~~ Left side on top, right side on bottom.
                    g.FillPolygon(leftSideBrush, topPointArr);
                    g.FillPolygon(rightSideBrush, bottomPointArr);
                }
                else
                {
                    // ~~ Left side on bottom, right side on top.
                    g.FillPolygon(leftSideBrush, bottomPointArr);
                    g.FillPolygon(rightSideBrush, topPointArr);
                }
                // Create pen.
                Pen blackPen = new Pen(Color.Black, 3);

                // Create rectangle.
                Rectangle rect = new Rectangle(0, 0, 30, 30);

                // Draw rectangle to screen.
                g.DrawRectangle(blackPen, rect);

                // Draw center line.
                g.FillRectangle(centerLineBrush, 0, (float)(centerLineY - 0.5), width, 1);
            }

            bm.Save("TEST.JPG");
            return(bm);
        }
Пример #3
0
        /// <summary>
        /// Creates waveform image.
        /// Length of level arrays can be less then number of render frames for a partial render.
        /// </summary>
        private static Bitmap CreateVerticalWaveformImage(WaveformDirection direction, WaveformSideOrientation sideOrientation,
                                                          int width, int height, float peakValue, int numFullRenderFrames,
                                                          float[] leftLevelArr, float[] rightLevelArr,
                                                          Brush leftSideBrush, Brush rightSideBrush, Brush centerLineBrush)
        {
            int    numRenderFrames = leftLevelArr.Length;
            bool   isPartialRender = numRenderFrames < numFullRenderFrames;
            double frameThickness  = 1d * height / numFullRenderFrames;
            double sideWidth       = width / 2d;
            double centerLineX     = (width - 1) / 2;

            PointF[] leftPointArr  = new PointF[numRenderFrames + 3];
            PointF[] rightPointArr = new PointF[numRenderFrames + 3];

            // Change peak value if partial render.
            if (isPartialRender)
            {
                peakValue = Math.Max(1f, peakValue);
            }

            // Make sure peakValue != 0 to avoid division by zero.
            if (peakValue == 0)
            {
                peakValue = 1f;
            }

            // Add start points.
            if (direction == WaveformDirection.TopToBottom)
            {
                // ~~ Top to bottom.
                leftPointArr[0]  = new PointF((float)centerLineX, 0f);
                rightPointArr[0] = new PointF((float)centerLineX, 0f);
            }
            else
            {
                // ~~ Bottom to top.
                leftPointArr[0]  = new PointF((float)centerLineX, height - 1);
                rightPointArr[0] = new PointF((float)centerLineX, height - 1);
            }

            double yLocation = -1d;

            // Add main points.
            for (int i = 0; i < numRenderFrames; i++)
            {
                if (direction == WaveformDirection.TopToBottom)
                {
                    // ~~ Top to bottom.
                    yLocation = (i * frameThickness + (i + 1) * frameThickness) / 2;
                }
                else
                {
                    // ~~ Bottom to top.
                    yLocation = height - 1 - ((i * frameThickness + (i + 1) * frameThickness) / 2);
                }

                double leftRenderWidth, rightRenderWidth;

                if (sideOrientation == WaveformSideOrientation.LeftSideOnTopOrLeft)
                {
                    // ~~ Left side on left, right side on right.
                    leftRenderWidth  = 1d * leftLevelArr[i] / peakValue * sideWidth;
                    rightRenderWidth = 1d * rightLevelArr[i] / peakValue * sideWidth;
                }
                else
                {
                    // ~~ Left side on right, right side on left.
                    leftRenderWidth  = 1d * rightLevelArr[i] / peakValue * sideWidth;
                    rightRenderWidth = 1d * leftLevelArr[i] / peakValue * sideWidth;
                }

                leftPointArr[i + 1]  = new PointF((float)(centerLineX - leftRenderWidth), (float)yLocation);
                rightPointArr[i + 1] = new PointF((float)(centerLineX + leftRenderWidth), (float)yLocation);
            }

            // Add end points.
            if (direction == WaveformDirection.TopToBottom)
            {
                // ~~ Top to bottom.
                if (isPartialRender)
                {
                    // Draw straight towards line, not to end point.
                    leftPointArr[numRenderFrames + 1]  = new PointF((float)centerLineX, (float)yLocation);
                    rightPointArr[numRenderFrames + 1] = new PointF((float)centerLineX, (float)yLocation);
                }
                else
                {
                    // Draw to end point.
                    leftPointArr[numRenderFrames + 1]  = new PointF((float)centerLineX, height - 1);
                    rightPointArr[numRenderFrames + 1] = new PointF((float)centerLineX, height - 1);
                }
                leftPointArr[numRenderFrames + 2]  = new PointF((float)centerLineX, 0f);
                rightPointArr[numRenderFrames + 2] = new PointF((float)centerLineX, 0f);
            }
            else
            {
                // ~~ Bottom to top.
                if (isPartialRender)
                {
                    // Draw straight towards line, not to end point.
                    leftPointArr[numRenderFrames + 1]  = new PointF((float)centerLineX, (float)yLocation);
                    rightPointArr[numRenderFrames + 1] = new PointF((float)centerLineX, (float)yLocation);
                }
                else
                {
                    // Draw to end point.
                    leftPointArr[numRenderFrames + 1]  = new PointF((float)centerLineX, 0f);
                    rightPointArr[numRenderFrames + 1] = new PointF((float)centerLineX, 0f);
                }
                leftPointArr[numRenderFrames + 2]  = new PointF((float)centerLineX, height - 1);
                rightPointArr[numRenderFrames + 2] = new PointF((float)centerLineX, height - 1);
            }

            // Create bitmap.
            Bitmap bm = new Bitmap(width, height);

            using (Graphics g = Graphics.FromImage(bm))
            {
                g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

                // Draw left and right waveform.
                if (sideOrientation == WaveformSideOrientation.LeftSideOnTopOrLeft)
                {
                    // ~~ Left side on left, right side on right.
                    g.FillPolygon(leftSideBrush, leftPointArr);
                    g.FillPolygon(rightSideBrush, rightPointArr);
                }
                else
                {
                    // ~~ Left side on right, right side on left.
                    g.FillPolygon(leftSideBrush, rightPointArr);
                    g.FillPolygon(rightSideBrush, leftPointArr);
                }

                // Draw center line.
                g.FillRectangle(centerLineBrush, (float)(centerLineX - 0.5), 0, 1, height);
            }

            return(bm);
        }