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public static FromTexture2D ( Microsoft.Xna.Framework.Graphics.Texture2D texture2D, SystemManagers managers ) : |
||
| texture2D | Microsoft.Xna.Framework.Graphics.Texture2D | |
| managers | SystemManagers | |
| return | ||
private Texture2D RenderToTexture2DUsingImageData(IEnumerable lines, HorizontalAlignment horizontalAlignment, SystemManagers managers)
{
ImageData[] imageDatas = new ImageData[this.mTextures.Length];
for (int i = 0; i < imageDatas.Length; i++)
{
// Only use the existing buffer on one-page fonts
var bufferToUse = mColorBuffer;
if (i > 0)
{
bufferToUse = null;
}
imageDatas[i] = ImageData.FromTexture2D(this.mTextures[i], managers, bufferToUse);
}
Point point = new Point();
int maxWidthSoFar = 0;
int requiredWidth = 0;
int requiredHeight = 0;
List <int> widths = new List <int>();
foreach (string line in lines)
{
requiredHeight += LineHeightInPixels;
requiredWidth = 0;
requiredWidth = MeasureString(line);
widths.Add(requiredWidth);
maxWidthSoFar = System.Math.Max(requiredWidth, maxWidthSoFar);
}
const int MaxWidthAndHeight = 2048; // change this later?
maxWidthSoFar = System.Math.Min(maxWidthSoFar, MaxWidthAndHeight);
requiredHeight = System.Math.Min(requiredHeight, MaxWidthAndHeight);
ImageData imageData = null;
if (maxWidthSoFar != 0)
{
imageData = new ImageData(maxWidthSoFar, requiredHeight, managers);
int lineNumber = 0;
foreach (string line in lines)
{
point.X = 0;
if (horizontalAlignment == HorizontalAlignment.Right)
{
point.X = maxWidthSoFar - widths[lineNumber];
}
else if (horizontalAlignment == HorizontalAlignment.Center)
{
point.X = (maxWidthSoFar - widths[lineNumber]) / 2;
}
foreach (char c in line)
{
BitmapCharacterInfo characterInfo = GetCharacterInfo(c);
int sourceLeft = characterInfo.GetPixelLeft(Texture);
int sourceTop = characterInfo.GetPixelTop(Texture);
int sourceWidth = characterInfo.GetPixelRight(Texture) - sourceLeft;
int sourceHeight = characterInfo.GetPixelBottom(Texture) - sourceTop;
int distanceFromTop = characterInfo.GetPixelDistanceFromTop(LineHeightInPixels);
// There could be some offset for this character
int xOffset = characterInfo.GetPixelXOffset(LineHeightInPixels);
point.X += xOffset;
point.Y = lineNumber * LineHeightInPixels + distanceFromTop;
Microsoft.Xna.Framework.Rectangle sourceRectangle = new Microsoft.Xna.Framework.Rectangle(
sourceLeft, sourceTop, sourceWidth, sourceHeight);
int pageIndex = characterInfo.PageNumber;
imageData.Blit(imageDatas[pageIndex], sourceRectangle, point);
point.X -= xOffset;
point.X += characterInfo.GetXAdvanceInPixels(LineHeightInPixels);
}
point.X = 0;
lineNumber++;
}
}
if (imageData != null)
{
// We don't want
// to generate mipmaps
// because text is usually
// rendered pixel-perfect.
const bool generateMipmaps = false;
return(imageData.ToTexture2D(generateMipmaps));
}
else
{
return(null);
}
}
public void Blit(Texture2D source, Rectangle sourceRectangle, Point destination)
{
ImageData sourceAsImageData = ImageData.FromTexture2D(source, mManagers);
Blit(sourceAsImageData, sourceRectangle, destination);
}
