public void AddText(Point baselineOrigin, IList <GlyphData> glyphs, IList <Vector> offsets, string fontFamily, double fontSize, Color color)
{
if (glyphs.Count != offsets.Count)
{
throw new ArgumentException($"The length of {nameof(glyphs)} must be equal to {nameof(offsets)}.");
}
DrawCommand cmd = new DrawCommand();
cmd.ClipRect = ClipRectStack.Peek();
cmd.TextureData = null;
this.TextMesh.Commands.Add(cmd);
var oldIndexBufferCount = this.TextMesh.IndexBuffer.Count;
var scale = OSImplementation.TypographyTextContext.GetScale(fontFamily, fontSize);
// get glyph data from typeface
for (var i = 0; i < glyphs.Count; i++)
{
var glyphData = glyphs[i];
Vector glyphOffset = offsets[i];
this.TextMesh.Append((Vector)baselineOrigin, glyphData, glyphOffset, scale, color, false);
}
var newIndexBufferCount = this.TextMesh.IndexBuffer.Count;
// Update command
var command = this.TextMesh.Commands[this.TextMesh.Commands.Count - 1];
command.ElemCount += newIndexBufferCount - oldIndexBufferCount;
this.TextMesh.Commands[this.TextMesh.Commands.Count - 1] = command;
}
public override void DrawImage(ITexture texture, Rect rectangle, Point uvMin, Point uvMax)
{
if (texture == null)
{
throw new ArgumentNullException(nameof(texture));
}
Color tintColor = Color.White;//TODO define tint color as a brush property
//add a new draw command
//TODO check if we need to add a new draw command
DrawCommand cmd = new DrawCommand();
cmd.ClipRect = ClipRectStack.Peek();
cmd.TextureData = texture;
this.ImageMesh.CommandBuffer.Add(cmd);
this.ImageMesh.PrimReserve(6, 4);
AddImageRect(rectangle, uvMin, uvMax, tintColor);
}
private bool EnsureDrawCommand()
{
var clipRect = ClipRectStack.Peek();
if (clipRect.IsEmpty)
{
//completely clipped
//no render
return(false);
}
var cmdBuf = this.ShapeMesh.CommandBuffer;
if (cmdBuf.Count == 0)
{
AddCmd();
return(true);
}
var lastCmd = cmdBuf[cmdBuf.Count - 1];
if (lastCmd.ClipRect != clipRect)
{
AddCmd();
return(true);
}
return(true);
void AddCmd()
{
var cmd = new DrawCommand
{
ClipRect = clipRect,
ElemCount = 0,
TextureData = null,
};
cmdBuf.Add(cmd);
}
}
