private FontResource()
{
this.FontBitmap = ManifestResourceLoader.LoadBitmap("LucidaTypewriterRegular.ttf.png");
string xmlContent = ManifestResourceLoader.LoadTextFile("LucidaTypewriterRegular.ttf.xml");
XElement xElement = XElement.Parse(xmlContent, LoadOptions.None);
this.FontHeight = int.Parse(xElement.Attribute(strFontHeight).Value);
this.FirstChar = (char)int.Parse(xElement.Attribute(strFirstChar).Value);
this.LastChar = (char)int.Parse(xElement.Attribute(strLastChar).Value);
this.CharInfoDict = CharacterInfoDictHelper.Parse(
xElement.Element(CharacterInfoDictHelper.strCharacterInfoDict));
}
private void InitTexture()
{
System.Drawing.Bitmap contentBitmap = ManifestResourceLoader.LoadBitmap("DemoSimplePointSpriteElement.png");
// step 4: get texture's size
int targetTextureWidth;
{
// Get the maximum texture size supported by OpenGL.
int[] textureMaxSize = { 0 };
GL.GetInteger(GetTarget.MaxTextureSize, textureMaxSize);
// Find the target width and height sizes, which is just the highest
// posible power of two that'll fit into the image.
targetTextureWidth = textureMaxSize[0];
int scaledWidth = contentBitmap.Width;
for (int size = 1; size <= textureMaxSize[0]; size *= 2)
{
if (scaledWidth < size)
{
targetTextureWidth = size / 2;
break;
}
if (scaledWidth == size)
{
targetTextureWidth = size;
}
}
}
// step 5: scale contentBitmap to right size
System.Drawing.Bitmap targetImage = contentBitmap;
if (contentBitmap.Width != targetTextureWidth || contentBitmap.Height != targetTextureWidth)
{
// Resize the image.
targetImage = (System.Drawing.Bitmap)contentBitmap.GetThumbnailImage(targetTextureWidth, targetTextureWidth, null, IntPtr.Zero);
}
// step 6: generate texture
{
// Lock the image bits (so that we can pass them to OGL).
BitmapData bitmapData = targetImage.LockBits(new Rectangle(0, 0, targetImage.Width, targetImage.Height),
ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
//GL.ActiveTexture(GL.GL_TEXTURE0);
GL.GenTextures(1, texture);
GL.BindTexture(GL.GL_TEXTURE_2D, texture[0]);
GL.TexImage2D(GL.GL_TEXTURE_2D, 0, (int)GL.GL_RGBA,
targetImage.Width, targetImage.Height, 0, GL.GL_BGRA, GL.GL_UNSIGNED_BYTE,
bitmapData.Scan0);
// Unlock the image.
targetImage.UnlockBits(bitmapData);
/* We require 1 byte alignment when uploading texture data */
//GL.PixelStorei(GL.GL_UNPACK_ALIGNMENT, 1);
/* Clamping to edges is important to prevent artifacts when scaling */
GL.TexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_S, (int)GL.GL_CLAMP_TO_EDGE);
GL.TexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_T, (int)GL.GL_CLAMP_TO_EDGE);
/* Linear filtering usually looks best for text */
GL.TexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, (int)GL.GL_LINEAR);
GL.TexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, (int)GL.GL_LINEAR);
}
// step 7: release images
{
//targetImage.Save("PointSpriteFontElement-TargetImage.png");
if (targetImage != contentBitmap)
{
targetImage.Dispose();
}
contentBitmap.Dispose();
}
}
