public RenderOptions(EgaColor defaultFgColor = EgaColor.Black, EgaColor defaultBgColor = EgaColor.White)
{
DefaultBackgroundColor = defaultBgColor;
DefaultForegroundColor = defaultFgColor;
BackgroundColor = defaultBgColor;
ForegroundColor = defaultFgColor;
}
public void SetsBackgroundColor(string argument, EgaColor expected)
{
var entry = new Background(new List <Flag>(), new List <Argument> {
new Argument(null, argument)
});
var ctx = new EntryRenderContext(null, null, new RenderOptions());
entry.Evaluate(ctx);
Assert.AreEqual(expected, ctx.Options.BackgroundColor);
}
public Color(EgaColor c) => _color = c;
protected void RenderLine(SpriteRenderContext renderContext, byte[] frameBuffer, int pixelOffset, int x1, int y1, int x2, int y2, EgaColor color = EgaColor.Black)
{
int w = x2 - x1;
int h = y2 - y1;
int dx1 = 0, dy1 = 0, dx2 = 0, dy2 = 0;
if (w < 0)
{
dx1 = -1;
}
else if (w > 0)
{
dx1 = 1;
}
if (h < 0)
{
dy1 = -1;
}
else if (h > 0)
{
dy1 = 1;
}
if (w < 0)
{
dx2 = -1;
}
else if (w > 0)
{
dx2 = 1;
}
int longest = Math.Abs(w);
int shortest = Math.Abs(h);
if (!(longest > shortest))
{
longest = Math.Abs(h);
shortest = Math.Abs(w);
if (h < 0)
{
dy2 = -1;
}
else if (h > 0)
{
dy2 = 1;
}
dx2 = 0;
}
int numerator = longest >> 1;
for (int i = 0; i <= longest; i++)
{
// putpixel(x, y, color);
if ((y1 * renderContext.State.Width) + x1 + pixelOffset < 0)
{
continue;
}
frameBuffer[(y1 * renderContext.State.Width) + x1 + pixelOffset] = (byte)color;
numerator += shortest;
if (!(numerator < longest))
{
numerator -= longest;
x1 += dx1;
y1 += dy1;
}
else
{
x1 += dx2;
y1 += dy2;
}
}
}
public CombinedColor(EgaColor background, EgaColor foreground)
{
Value = (byte)((((byte)foreground & 0x0F) << 4) | ((byte)background & 0x0F));
}
