/**
* Construct this Field object from another Field object.
*/
protected void ConstructFromField(Field field)
{
Resize(field.Width, field.Height);
for (uint x = 0; x < width; x++)
{
for (uint y = 0; y < height; y++)
{
SetBlock(x, y, field.GetBlock(x, y));
}
}
}
/**
* Construct this Field object from another Field object.
*/
protected void ConstructFromField(Field field) {
Resize(field.Width, field.Height);
for (uint x = 0; x < width; x++) {
for (uint y = 0; y < height; y++) {
SetBlock(x, y, field.GetBlock(x, y));
}
}
}
/**
* Render a part of a field to a Gdk.Pixbuf.
*
* @param region The region of the field to render.
* @param selection The region of the field that is selected, or null.
* This region will be rendered with a different color.
* @require Both region and selection must be within the current field's bounds.
*/
public Pixbuf RenderToPixbuf(FieldRegion region, FieldRegion selection) {
Point screenLeftTop;
uint width, height;
byte[] pixels;
/*
* Create a pixel buffer which will hold the region we're
* going to render.
*/
screenLeftTop.X = (int) region.Left;
screenLeftTop.Y = (int) region.Top;
Calc.FieldPosToScreenPos(ref screenLeftTop, field, zoomLevel);
width = region.Width * zoomLevel;
height = region.Height * zoomLevel;
pixels = new byte[width * height * CHANNELS];
/*
* Go through each block in the region and render it
* to the pixel buffer.
*/
for (uint y = region.Bottom; y <= region.Top; y++) {
for (uint x = region.Left; x <= region.Right; x++) {
Point p;
Color color;
p.X = (int) x;
p.Y = (int) y;
Calc.FieldPosToScreenPos(ref p, field, zoomLevel);
if (selection != null && WithinSelection(selection, x, y)) {
color = colors.GetSelectionColor(field.GetBlock(x, y));
} else {
color = colors.GetColor(field.GetBlock(x, y));
}
DrawFilledRect(pixels,
(uint) (p.X - screenLeftTop.X),
(uint) (p.Y - screenLeftTop.Y),
zoomLevel, zoomLevel, width,
(byte) (color.Red / 256),
(byte) (color.Green / 256),
(byte) (color.Blue / 256));
}
}
/*
* Render the selection border.
*/
if (selection != null) {
Point p1, p2;
Color color;
p1.X = (int) selection.Left;
p1.Y = (int) selection.Top;
p2.X = (int) selection.Right;
p2.Y = (int) selection.Bottom;
Calc.FieldPosToScreenPos(ref p1, field, zoomLevel);
Calc.FieldPosToScreenPos(ref p2, field, zoomLevel);
p1.X -= screenLeftTop.X;
p1.Y -= screenLeftTop.Y;
p2.X -= screenLeftTop.X;
p2.Y -= screenLeftTop.Y;
color = colors.SelectionBorderColor;
DrawOpenRect(pixels,
(uint) p1.X,
(uint) p1.Y,
(uint) (p2.X - p1.X + zoomLevel - 1),
(uint) (p2.Y - p1.Y + zoomLevel - 1),
width,
(byte) (color.Red / 256),
(byte) (color.Green / 256),
(byte) (color.Blue / 256));
}
return new Pixbuf(pixels, Colorspace.Rgb, CHANNELS == 4, 8,
(int) width, (int) height,
(int) (width * CHANNELS), null);
}