// Capture all characters of the font texture to seperate rectangles that can be used to display text
//
// Pre-conditions:
//
// - Must be complete ASCII set from ! to ~
// - There must be an empty horizontal line between character lines
// - There must be an empty vertical line between characters
// - All characters must consist of one connecting piece, except :;= they must consist of 2 pieces
// - Vertical offset is based on the highest character of a line, so you might need to adjust some characters a little bit using Adjust() method (before calling Initialize)
//
public void Initialize(Texture2D textureFont_)
{
fontRect = new Rectangle[255];
fontYOffset = new int[255];
textureFont = textureFont_;
bitmapData = new Color[textureFont.Width * textureFont.Height];
textureFont.GetData <Color>(bitmapData, 0, bitmapData.Length);
int x = 0;
int y = 0;
CharacterNumber = 0;
FirstNonemptyLine = -1;
LastNonemptyLine = -1;
LineNumber = 0;
detectionPhase = DetectionPhase.FindObject;
while (y < textureFont.Height)
{
if (detectionPhase.Equals(DetectionPhase.FindObject))
{
if (!isBackgroundPixel(x + y * textureFont.Width)) // found object
{
FirstNonemptyLine = y;
detectionPhase = DetectionPhase.FindEmptyLine;
}
x++;
if (x >= textureFont.Width)
{
x = 0;
y++;
}
}
if (detectionPhase.Equals(DetectionPhase.FindEmptyLine))
{
int xx;
int yy = FirstNonemptyLine;
{
bool isEmptyLine = false;
while (!isEmptyLine)
{
xx = 0;
yy++;
isEmptyLine = true;
while (isEmptyLine && xx <= textureFont.Width)
{
if (!isBackgroundPixel(xx + yy * textureFont.Width))
{
isEmptyLine = false;
}
xx++;
}
}
LastNonemptyLine = yy;
detectionPhase = DetectionPhase.VerticalScanning;
}
}
if (detectionPhase.Equals(DetectionPhase.VerticalScanning))
{
VerticalScanning();
y = LastNonemptyLine + 1;
x = 0;
LineNumber++;
}
}
}
private void VerticalScanning()
{
Rectangle rect;
int x = 0;
int y = FirstNonemptyLine;
while (y < LastNonemptyLine || x < textureFont.Width)
{
y++;
if (y > LastNonemptyLine)
{
y = FirstNonemptyLine;
x++;
}
if (!isBackgroundPixel(x + y * textureFont.Width)) // found object
{
rect = ExpandArea(bitmapData, new Rectangle(x - 1, y - 1, 3, 3)); // create rectangle around object
if (CharacterNumber == 25 || CharacterNumber == 26 || CharacterNumber == 28) // find another object below this rectangle and add it (for characters ;:=)
{
int xx = rect.Left; // NOTE: we start looking from the left of the first object to find the second. That's ok for now, because the character-parts vertically overlap each other
int yy = FirstNonemptyLine;
while (isBackgroundPixel(xx + yy * textureFont.Width) || rect.Contains(xx, yy))
{
yy++;
if (yy > LastNonemptyLine)
{
yy = FirstNonemptyLine;
xx++;
}
}
Rectangle rect2 = new Rectangle(xx, yy, 3, 3);
rect2 = ExpandArea(bitmapData, rect2); // create rectangle around object
// now create a rectangle around both rectangles
if (rect2.X < rect.X)
{
rect.Width += (rect.X - rect2.X);
rect.X = rect2.X;
}
if (rect2.Y < rect.Y)
{
rect.Height += (rect.Y - rect2.Y);
rect.Y = rect2.Y;
}
if (rect2.Right > rect.Right)
{
rect.Width += (rect2.Right - rect.Right);
}
if (rect2.Bottom > rect.Bottom)
{
rect.Height += (rect2.Bottom - rect.Bottom);
}
}
fontRect[CharacterNumber] = rect;
fontYOffset[CharacterNumber] = fontExtraYOffset[LineNumber] + rect.Top - FirstNonemptyLine;
CharacterNumber++;
x += rect.Width;
}
}
detectionPhase = DetectionPhase.FindObject;
}
