/// <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));
}
}
/// <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);
}
/// <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);
}
