private void UpdateGlyphGrid(GlyphFontViewModel glyphFontViewModel)
{
if (_currentGlyphFontViewModelOfGlyphGrid == glyphFontViewModel)
{
return;
}
if (glyphFontViewModel.GlyphCount > 256)
{
throw new Exception("Only fonts allowed of up to 256 characters.");
}
var glyphButtonViewModels = new GlyphButtonViewModel[glyphFontViewModel.GlyphCount];
for (var glyphIndex = 0; glyphIndex < glyphFontViewModel.GlyphCount; glyphIndex++)
{
if (glyphIndex >= glyphFontViewModel.GlyphCount)
{
break;
}
var glyphCropInFontImage = glyphFontViewModel.GetGlyphCropRectangle(glyphIndex);
glyphButtonViewModels[glyphIndex] = new GlyphButtonViewModel(glyphFontViewModel, glyphIndex, glyphCropInFontImage);
}
GlyphGrid.ItemsSource = glyphButtonViewModels;
_currentGlyphFontViewModelOfGlyphGrid = glyphFontViewModel;
}
public GlyphChangedEvent(GlyphFontViewModel previousGlyphFontViewModel, GlyphFontViewModel newNewGlyphFontViewModel, int previousGlyphIndex, int newGlyphIndex)
{
PreviousGlyphFontViewModel = previousGlyphFontViewModel;
NewGlyphFontViewModel = newNewGlyphFontViewModel;
PreviousGlyphIndex = previousGlyphIndex;
NewGlyphIndex = newGlyphIndex;
}
public GlyphButtonViewModel(GlyphFontViewModel glyphFontViewModel, int glyphIndex, Int32Rect cropInFontBitmap)
{
GlyphFontViewModel = glyphFontViewModel;
GlyphIndex = glyphIndex;
CropInFontBitmap = cropInFontBitmap;
var size = Math.Max(glyphFontViewModel.GlyphSize.X, glyphFontViewModel.GlyphSize.Y);
Stretch = size > 12 ? Stretch.Uniform : Stretch.None;
}
private void ChangeGlyph(GlyphFontViewModel glyphFontViewModel, int glyphIndex)
{
if (CurrentGlyphMapTexture?.GlyphFontViewModel != glyphFontViewModel)
{
if (!_glyphMapTextures.ContainsKey(glyphFontViewModel))
{
var texture = Texture2D.FromStream(GraphicsDevice, File.OpenRead(glyphFontViewModel.Filename));
CurrentGlyphMapTexture = new GlyphMapTexture(glyphFontViewModel, texture, glyphFontViewModel.GlyphSize.X, glyphFontViewModel.GlyphSize.Y);
_glyphMapTextures.Add(glyphFontViewModel, CurrentGlyphMapTexture);
}
else
{
CurrentGlyphMapTexture = _glyphMapTextures[glyphFontViewModel];
}
}
Brush.GlyphIndex = glyphIndex;
}
public GlyphMapTexture(GlyphFontViewModel glyphFontViewModel, Texture2D texture, int glyphWidth, int glyphHeight)
{
GlyphFontViewModel = glyphFontViewModel;
Texture = texture;
if (texture.Width % glyphWidth != 0)
{
throw new ArgumentOutOfRangeException($"Texture width ({texture.Width}) is not a multitude of GlyphWidth ({glyphWidth}).");
}
if (texture.Height % glyphHeight != 0)
{
throw new ArgumentOutOfRangeException($"Texture height ({texture.Height}) is not a multitude of GlyphHeight ({glyphHeight}).");
}
ColumnCount = texture.Width / glyphWidth;
RowCount = texture.Height / glyphHeight;
GlyphWidth = glyphWidth;
GlyphHeight = glyphHeight;
GlyphWidthU = GlyphWidth / texture.Width;
GlyphHeightV = GlyphHeight / texture.Height;
ConvertGrayValuesToAlpha(texture);
BuildGlyphUVLookup(texture, glyphHeight);
}
public ChangeGlyphFontCommand(GlyphFontViewModel glyphFontViewModel)
{
GlyphFontViewModel = glyphFontViewModel;
}
