public MainGuiElement(Window window)
{
_window = window;
// Setup static mesh if needed, note that it's in screen-space coordinates as no transformation is applied
_glMesh = _glMesh ??
new GLMesh(
new[] { new Vector3(-1, -1, 0), new Vector3(1, -1, 0), new Vector3(1, 1, 0), new Vector3(-1, 1, 0) },
new uint[] { 0, 1, 3, 1, 2, 3 });
// Setup static shader if needed. Normally this would be managed by a material, but this is a one-off exception
if (_guiShader == null)
{
_guiShader = new GLGuiShader();
_guiShader.GpuAllocateDeferred();
}
// Setup defaults
Width = new SFixed(window.NativeWindow.Width);
Height = new SFixed(window.NativeWindow.Height);
ChildAlignment = ChildAlignments.Row;
// GL Deynamic Texture
// Re-upload texutre to GPU
_glTexture = new GLDynamicTexture(GLTextureParams.Default, _window.UnscaledSize.Width, _window.UnscaledSize.Height);
_glTexture.GpuAllocateDeferred();
// Register NativeWindow events
window.NativeWindow.KeyDown += (sender, args) => FocusedElement?.OnKeyDown(args);
window.NativeWindow.KeyUp += (sender, args) => FocusedElement?.OnKeyUp(args);
window.NativeWindow.Resize += (sender, args) => _glTexture.Resize(_window.UnscaledSize.Width, _window.UnscaledSize.Height);
window.NativeWindow.MouseDown += (sender, args) =>
{
var clickedElement = GetTopmostElementAtPoint(args.Position);
if (clickedElement == FocusedElement)
{
return;
}
// De-Focus last focused element
FocusedElement?.OnLostFocus();
// Focus the new one
FocusedElement = clickedElement;
FocusedElement.OnFocus();
};
window.NativeWindow.MouseUp += (sender, args) =>
{
var clickedElement = GetTopmostElementAtPoint(args.Position);
// If the mouse is still within the control's bounds fire click event
if (clickedElement == FocusedElement)
{
FocusedElement?.OnClicked(args);
}
// TODO: Fire the drag release event here
clickedElement?.OnMouseUp(args);
};
window.NativeWindow.MouseMove += (sender, args) =>
{
var mouseOverElement = GetTopmostElementAtPoint(args.Position);
if (mouseOverElement != _lastMouseOver)
{
_lastMouseOver?.OnMouseLeave();
}
_lastMouseOver = mouseOverElement;
mouseOverElement?.OnMouseEnter();
};
window.NativeWindow.MouseWheel += (sender, args) => FocusedElement?.OnMouseWheel(args);
window.NativeWindow.FocusedChanged += (sender, args) =>
{
if (window.NativeWindow.Focused)
{
// Reforcused
FocusedElement?.OnFocus();
}
else
{
// Unfocused
FocusedElement?.OnLostFocus();
_lastMouseOver?.OnMouseLeave();
}
};
}
private void LoadCharacterSet(string characters)
{
using (var graphics = Graphics.FromImage(AtlasTexture.Bitmap))
{
graphics.CompositingQuality = CompositingQuality.HighQuality;
graphics.SmoothingMode = SmoothingMode.HighQuality;
// DEBUG
using (Brush aGradientBrush = new LinearGradientBrush(new Point(0, 0), new Point(0, 1024), Color.Blue, Color.Green))
{
graphics.FillRectangle(aGradientBrush, 0, 0, 1024, 1024);
}
foreach (var character in characters)
{
var glyphIndex = _face.GetCharIndex(character);
_face.LoadGlyph(glyphIndex, LoadFlags.Default, LoadTarget.Normal);
_face.Glyph.RenderGlyph(RenderMode.Normal);
// Get all Kerning pairs
Dictionary <char, float> kerningPairs = null;
if (_face.HasKerning)
{
kerningPairs = new Dictionary <char, float>();
// Load all kerning pairs
foreach (var otherCharacter in characters)
{
var kerning =
(float)_face.GetKerning(glyphIndex, _face.GetCharIndex(otherCharacter), KerningMode.Default).X;
kerningPairs.Add(otherCharacter, kerning);
}
}
// Draw the image, if there is one (might not be, for example 'space')
var ftbmp = _face.Glyph.Bitmap;
if (ftbmp.Width > 0 && ftbmp.Rows > 0)
{
// Draw the Glyph to the atlas Bitmap
var cBmp = ftbmp.ToGdipBitmap(Color.Red);
var drawLocation = BoxPacker.TryPackingBox(cBmp.Size);
if (!drawLocation.HasValue)
{
throw new Exception("Failed to pack chacter");
}
// Draw using the bottom left as (0, 0) not the top left.
var flippedDrawLocation = new Point(drawLocation.Value.X,
AtlasSize - drawLocation.Value.Y - cBmp.Height);
graphics.DrawImageUnscaled(cBmp, flippedDrawLocation);
// Some quick helper to keep Position and UV stuff a little cleaner.
var positionLowerLeft = new Vector3(_face.Glyph.BitmapLeft, -(cBmp.Height - _face.Glyph.BitmapTop), 0);
var uvLowerLeft = new Vector2(drawLocation.Value.X / (float)AtlasSize,
drawLocation.Value.Y / (float)AtlasSize);
var uvSize = new Vector2(cBmp.Width / (float)AtlasSize, cBmp.Height / (float)AtlasSize);
_characterMetrics.Add(character, new CharacterMetric
{
IsDrawn = true,
PositionOffsets = new[]
{
positionLowerLeft, positionLowerLeft + new Vector3(cBmp.Width, cBmp.Height, 0),
positionLowerLeft + new Vector3(0, cBmp.Height, 0), positionLowerLeft + new Vector3(cBmp.Width, 0, 0)
},
UV0 = new[]
{
uvLowerLeft, uvLowerLeft + uvSize, new Vector2(uvLowerLeft.X, uvLowerLeft.Y + uvSize.Y),
new Vector2(uvLowerLeft.X + uvSize.X, uvLowerLeft.Y)
},
Size = cBmp.Size,
Bearing = new Point(_face.Glyph.BitmapLeft, _face.Glyph.BitmapTop),
Advance = (int)_face.Glyph.Advance.X,
KerningPairs = kerningPairs
});
}
else
{
_characterMetrics.Add(character, new CharacterMetric
{
IsDrawn = false,
Advance = (int)_face.Glyph.Advance.X,
KerningPairs = kerningPairs
});
}
}
}
// Update GPU texture
if (AtlasTexture != null)
{
return;
}
AtlasTexture = new GLDynamicTexture(GLTextureParams.Default, AtlasSize, AtlasSize);
AtlasTexture.GpuAllocateDeferred();
}