private void DrawViewportBackground(Aurigma.GraphicsMill.Bitmap canvas, System.Drawing.Rectangle viewport, System.Drawing.Rectangle renderingRegion)
{
using (Aurigma.GraphicsMill.Drawing.Graphics g = canvas.GetGraphics())
{
System.Drawing.Rectangle screenRect = renderingRegion;
screenRect.X -= viewport.X;
screenRect.Y -= viewport.Y;
if (_workspaceBackgroundStyle == Aurigma.GraphicsMill.WinControls.WorkspaceBackgroundStyle.Grid)
{
int gridPatternSize = 2 * bgGridCellSize;
int patternOffsetX = renderingRegion.X % gridPatternSize,
patternOffsetY = renderingRegion.Y % gridPatternSize;
CreateBackgroundGridTemplate(renderingRegion.Width + gridPatternSize);
System.Drawing.Rectangle srcRect = new System.Drawing.Rectangle(0, 0, _bgGridTemplate.Width, _bgGridTemplate.Height),
dstRect = new System.Drawing.Rectangle(renderingRegion.Location, srcRect.Size);
dstRect.Offset(-viewport.X, -viewport.Y);
dstRect.Offset(-patternOffsetX, -patternOffsetY);
g.SetClip(new System.Drawing.Rectangle(renderingRegion.X - viewport.X, renderingRegion.Y - viewport.Y, renderingRegion.Width, renderingRegion.Height));
try
{
int templateRepeats = (int)System.Math.Ceiling((float)(renderingRegion.Height + patternOffsetY) / _bgGridTemplate.Height);
for (int j = 0; j < templateRepeats; j++)
{
g.DrawImage(_bgGridTemplate, dstRect, /*srcRect,*/ Aurigma.GraphicsMill.Transforms.CombineMode.Copy, 1.0f, Aurigma.GraphicsMill.Transforms.ResizeInterpolationMode.NearestNeighbour);
dstRect.Offset(0, _bgGridTemplate.Height);
}
}
finally
{
g.ResetClip();
}
}
else if (_workspaceBackgroundStyle == Aurigma.GraphicsMill.WinControls.WorkspaceBackgroundStyle.Solid)
{
g.FillRectangle(new Aurigma.GraphicsMill.Drawing.SolidBrush(_workspaceBackColor1), screenRect);
}
else
{
g.FillRectangle(new Aurigma.GraphicsMill.Drawing.SolidBrush(_backColor), screenRect);
}
}
}
private void CreateBackgroundGridTemplate(int width)
{
if (width < 1)
{
throw new System.ArgumentOutOfRangeException("width", StringResources.GetString("ExStrValueShouldBeAboveZero"));
}
if (_bgGridTemplate != null && _bgGridTemplate.Width >= width)
{
return;
}
if (_bgGridTemplate != null)
{
_bgGridTemplate.Dispose();
}
_bgGridTemplate = new Aurigma.GraphicsMill.Bitmap(width, 2 * bgGridCellSize, Aurigma.GraphicsMill.PixelFormat.Format24bppRgb);
using (Aurigma.GraphicsMill.Drawing.Graphics g = _bgGridTemplate.GetGraphics())
{
Aurigma.GraphicsMill.Drawing.SolidBrush brush0 = new Aurigma.GraphicsMill.Drawing.SolidBrush(_workspaceBackColor1),
brush1 = new Aurigma.GraphicsMill.Drawing.SolidBrush(_workspaceBackColor2);
System.Drawing.Rectangle cellRect = new System.Drawing.Rectangle(0, 0, bgGridCellSize, bgGridCellSize);
int n = (int)System.Math.Ceiling((float)width / (2.0f * bgGridCellSize));
for (int i = 0; i < n; i++)
{
g.FillRectangle(brush0, cellRect);
cellRect.Offset(bgGridCellSize, 0);
g.FillRectangle(brush1, cellRect);
cellRect.Offset(bgGridCellSize, 0);
}
cellRect.Location = new System.Drawing.Point(0, bgGridCellSize);
for (int i = 0; i < n; i++)
{
g.FillRectangle(brush1, cellRect);
cellRect.Offset(bgGridCellSize, 0);
g.FillRectangle(brush0, cellRect);
cellRect.Offset(bgGridCellSize, 0);
}
}
}