public bool ReadRecord(out DrawImageCommand record)
{
record = default;
unsafe
{
fixed(byte *pByte = this.buffer)
{
// This pointer points to the current read point in the
// instruction stream.
byte *pCur = pByte;
// This points to the first byte past the end of the
// instruction stream (i.e. when to stop)
byte *pEndOfInstructions = pByte + this.currentReadOffset;
if ((pCur >= pEndOfInstructions)) //reach end
{
return(false);
}
RecordHeader *pCurRecord = (RecordHeader *)pCur;
if (pCurRecord->Type != RecordType.DrawImage)
{
return(false);
}
DrawImageCommand *data = (DrawImageCommand *)(pCur + sizeof(RecordHeader));
record = *data;
this.currentReadOffset += pCurRecord->Size;
return(true);
}
}
}
public override void DrawImage(ImGui.OSAbstraction.Graphics.ITexture image, Rect rectangle)
{
if (image == null)
{
return;
}
EnsureContent();
unsafe
{
var record = new DrawImageCommand(
content.AddDependentResource(image),
rectangle);
content.WriteRecord(RecordType.DrawImage, (byte *)&record, sizeof(DrawImageCommand));
}
}
/// <summary>
/// Executes the DrawImageCommand command.
/// </summary>
public void ExecuteDrawImageCommand()
{
// create the processing command
DrawImageCommand command = ImageProcessingCommandFactory.CreateDrawImageCommand(_viewer.Image);
// set properties of command
PropertyGridForm propertyGridForm = new PropertyGridForm(command, "Draw Image Command Properties", true);
if (propertyGridForm.ShowDialog() != DialogResult.OK)
{
return;
}
// save a reference to the overlay image, image will be disposed when command is finished
_overlayImage = command.OverlayImage;
// execute the command
ExecuteProcessingCommand(command, true);
}
