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 void ReadAllRecords(GeometryRenderer ctx)
{
// We shouldn't have any dependent resources if _curOffset is 0
// (curOffset == 0) -> (renderData.dependentResources.Count == 0)
Debug.Assert((curOffset > 0) || (dependentResources.Count == 0));
// The buffer being null implies that curOffset must be 0.
// (buffer == null) -> (curOffset == 0)
Debug.Assert((buffer != null) || (curOffset == 0));
// The _curOffset must be less than the length, if there is a buffer.
Debug.Assert((buffer == null) || (curOffset <= buffer.Length));
if (curOffset > 0)
{
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 + curOffset;
// Iterate across the entire list of instructions, stopping at the
// end or when it has signalled a stop.
while ((pCur < pEndOfInstructions) && !ctx.ShouldStopWalking)
{
RecordHeader *pCurRecord = (RecordHeader *)pCur;
switch (pCurRecord->Type)
{
case RecordType.DrawLine:
{
DrawLineCommand *data = (DrawLineCommand *)(pCur + sizeof(RecordHeader));
ctx.DrawLine(
(Pen)DependentLookup(data->PenIndex),
data->StartPoint,
data->EndPoint
);
}
break;
case RecordType.DrawRectangle:
{
DrawRectangleCommand *data = (DrawRectangleCommand *)(pCur + sizeof(RecordHeader));
ctx.DrawRectangle(
(Brush)DependentLookup(data->BrushIndex),
(Pen)DependentLookup(data->PenIndex),
data->Rectangle
);
}
break;
case RecordType.DrawRoundedRectangle:
{
DrawRoundedRectangleCommand *data = (DrawRoundedRectangleCommand *)(pCur + sizeof(RecordHeader));
ctx.DrawRoundedRectangle(
(Brush)DependentLookup(data->BrushIndex),
(Pen)DependentLookup(data->PenIndex),
data->Rectangle,
data->radiusX,
data->radiusY
);
}
break;
case RecordType.DrawEllipse:
{
DrawEllipseCommand *data = (DrawEllipseCommand *)(pCur + sizeof(RecordHeader));
ctx.DrawEllipse(
(Brush)DependentLookup(data->BrushIndex),
(Pen)DependentLookup(data->PenIndex),
data->Center,
data->RadiusX,
data->RadiusY
);
}
break;
case RecordType.DrawGlyphRun:
{
DrawGlyphRunCommand *data = (DrawGlyphRunCommand *)(pCur + sizeof(RecordHeader));
ctx.DrawGlyphRun(
(Brush)DependentLookup(data->BrushIndex),
(GlyphRun)DependentLookup(data->GlyphRunIndex)
);
}
break;
case RecordType.DrawText:
{
DrawTextCommand *data = (DrawTextCommand *)(pCur + sizeof(RecordHeader));
ctx.DrawText(
(Brush)DependentLookup(data->BrushIndex),
(FormattedText)DependentLookup(data->FormattedTextIndex)
);
}
break;
case RecordType.DrawGeometry:
{
DrawGeometryCommand *data = (DrawGeometryCommand *)(pCur + sizeof(RecordHeader));
ctx.DrawGeometry(
(Brush)DependentLookup(data->BrushIndex),
(Pen)DependentLookup(data->PenIndex),
(Geometry)DependentLookup(data->GeometryIndex)
);
}
break;
case RecordType.DrawImage:
{
DrawImageCommand *data = (DrawImageCommand *)(pCur + sizeof(RecordHeader));
ctx.DrawImage(
(ITexture)DependentLookup(data->ImageSourceIndex),
data->rectangle,
data->UVMin,
data->UVMax
);
}
break;
case RecordType.DrawSlicedImage:
{
DrawSlicedImageCommand *data = (DrawSlicedImageCommand *)(pCur + sizeof(RecordHeader));
ctx.DrawImage(
(ITexture)DependentLookup(data->ImageSourceIndex),
data->Rectangle,
(data->sliceLeft, data->sliceTop, data->sliceRight, data->sliceBottom)
);
}
break;
case RecordType.PushClip:
{
PushClipCommand *data = (PushClipCommand *)(pCur + sizeof(RecordHeader));
ctx.PushClip(
(Geometry)DependentLookup(data->ClipGeometryIndex)
);
}
break;
case RecordType.Pop:
{
ctx.Pop();
}
break;
default:
throw new ArgumentOutOfRangeException();
break;
}
pCur += pCurRecord->Size;
}
}
}
}
}
public void AppendRecords(DrawingContent newContent)
{
var curOffset = newContent.curOffset;
var dependentResources = newContent.dependentResources;
var buffer = newContent.buffer;
// We shouldn't have any dependent resources if _curOffset is 0
// (curOffset == 0) -> (renderData.dependentResources.Count == 0)
Debug.Assert((curOffset > 0) || (dependentResources.Count == 0));
// The buffer being null implies that curOffset must be 0.
// (buffer == null) -> (curOffset == 0)
Debug.Assert((buffer != null) || (curOffset == 0));
// The _curOffset must be less than the length, if there is a buffer.
Debug.Assert((buffer == null) || (curOffset <= buffer.Length));
if (curOffset > 0)
{
unsafe
{
fixed(byte *pByte = 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 + curOffset;
// Iterate across the entire list of instructions, stopping at the
// end or when it has signalled a stop.
while (pCur < pEndOfInstructions)
{
RecordHeader *pCurRecord = (RecordHeader *)pCur;
switch (pCurRecord->Type)
{
case RecordType.DrawLine:
{
DrawLineCommand *data = (DrawLineCommand *)(pCur + sizeof(RecordHeader));
var pen = (Pen)newContent.DependentLookup(data->PenIndex);
int penIndexUint = this.dependentResources.IndexOf(pen);
if (penIndexUint < 0)
{
data->PenIndex = this.AddDependentResource(pen);
}
else
{
data->PenIndex = (uint)penIndexUint;
}
this.WriteRecord(RecordType.DrawLine, (byte *)data, sizeof(DrawLineCommand));
}
break;
case RecordType.DrawRectangle:
{
DrawRectangleCommand *data = (DrawRectangleCommand *)(pCur + sizeof(RecordHeader));
var brush = (Brush)newContent.DependentLookup(data->BrushIndex);
int brushIndexUint = this.dependentResources.IndexOf(brush);
if (brushIndexUint < 0)
{
data->BrushIndex = this.AddDependentResource(brush);
}
else
{
data->BrushIndex = (uint)brushIndexUint;
}
var pen = (Pen)newContent.DependentLookup(data->PenIndex);
int penIndexUint = this.dependentResources.IndexOf(pen);
if (penIndexUint < 0)
{
data->PenIndex = this.AddDependentResource(pen);
}
else
{
data->PenIndex = (uint)penIndexUint;
}
this.WriteRecord(RecordType.DrawRectangle, (byte *)data, sizeof(DrawRectangleCommand));
}
break;
case RecordType.DrawRoundedRectangle:
{
DrawRoundedRectangleCommand *data = (DrawRoundedRectangleCommand *)(pCur + sizeof(RecordHeader));
var brush = (Brush)newContent.DependentLookup(data->BrushIndex);
int brushIndexUint = this.dependentResources.IndexOf(brush);
if (brushIndexUint < 0)
{
data->BrushIndex = this.AddDependentResource(brush);
}
else
{
data->BrushIndex = (uint)brushIndexUint;
}
var pen = (Pen)newContent.DependentLookup(data->PenIndex);
int penIndexUint = this.dependentResources.IndexOf(pen);
if (penIndexUint < 0)
{
data->PenIndex = this.AddDependentResource(pen);
}
else
{
data->PenIndex = (uint)penIndexUint;
}
this.WriteRecord(RecordType.DrawRoundedRectangle, (byte *)data,
sizeof(DrawRoundedRectangleCommand));
}
break;
case RecordType.DrawEllipse:
{
DrawEllipseCommand *data = (DrawEllipseCommand *)(pCur + sizeof(RecordHeader));
var brush = (Brush)newContent.DependentLookup(data->BrushIndex);
int brushIndexUint = this.dependentResources.IndexOf(brush);
if (brushIndexUint < 0)
{
data->BrushIndex = this.AddDependentResource(brush);
}
else
{
data->BrushIndex = (uint)brushIndexUint;
}
var pen = (Pen)newContent.DependentLookup(data->PenIndex);
int penIndexUint = this.dependentResources.IndexOf(pen);
if (penIndexUint < 0)
{
data->PenIndex = this.AddDependentResource(pen);
}
else
{
data->PenIndex = (uint)penIndexUint;
}
this.WriteRecord(RecordType.DrawEllipse, (byte *)data, sizeof(DrawEllipseCommand));
}
break;
case RecordType.DrawGlyphRun:
{
DrawGlyphRunCommand *data = (DrawGlyphRunCommand *)(pCur + sizeof(RecordHeader));
var brush = (Brush)newContent.DependentLookup(data->BrushIndex);
int brushIndexUint = this.dependentResources.IndexOf(brush);
if (brushIndexUint < 0)
{
data->BrushIndex = this.AddDependentResource(brush);
}
else
{
data->BrushIndex = (uint)brushIndexUint;
}
var glyphRun = (GlyphRun)newContent.DependentLookup(data->GlyphRunIndex);
int glyphRunIndexUint = this.dependentResources.IndexOf(glyphRun);
if (glyphRunIndexUint < 0)
{
data->GlyphRunIndex = this.AddDependentResource(glyphRun);
}
else
{
data->GlyphRunIndex = (uint)glyphRunIndexUint;
}
this.WriteRecord(RecordType.DrawGlyphRun, (byte *)data, sizeof(DrawGlyphRunCommand));
}
break;
case RecordType.DrawText:
{
DrawTextCommand *data = (DrawTextCommand *)(pCur + sizeof(RecordHeader));
var brush = (Brush)newContent.DependentLookup(data->BrushIndex);
int brushIndexUint = this.dependentResources.IndexOf(brush);
if (brushIndexUint < 0)
{
data->BrushIndex = this.AddDependentResource(brush);
}
else
{
data->BrushIndex = (uint)brushIndexUint;
}
var formattedText = (FormattedText)newContent.DependentLookup(data->FormattedTextIndex);
int formattedTextIndexUint = this.dependentResources.IndexOf(formattedText);
if (formattedTextIndexUint < 0)
{
data->FormattedTextIndex = this.AddDependentResource(formattedText);
}
else
{
data->FormattedTextIndex = (uint)formattedTextIndexUint;
}
this.WriteRecord(RecordType.DrawText, (byte *)data, sizeof(DrawTextCommand));
}
break;
case RecordType.DrawGeometry:
{
DrawGeometryCommand *data = (DrawGeometryCommand *)(pCur + sizeof(RecordHeader));
var brush = (Brush)newContent.DependentLookup(data->BrushIndex);
int brushIndexUint = this.dependentResources.IndexOf(brush);
if (brushIndexUint < 0)
{
data->BrushIndex = this.AddDependentResource(brush);
}
else
{
data->BrushIndex = (uint)brushIndexUint;
}
var pen = (Pen)newContent.DependentLookup(data->PenIndex);
int penIndexUint = this.dependentResources.IndexOf(pen);
if (penIndexUint < 0)
{
data->PenIndex = this.AddDependentResource(pen);
}
else
{
data->PenIndex = (uint)penIndexUint;
}
var geometry = (Geometry)newContent.DependentLookup(data->GeometryIndex);
int geometryIndexUint = this.dependentResources.IndexOf(geometry);
if (geometryIndexUint < 0)
{
data->GeometryIndex = this.AddDependentResource(geometry);
}
else
{
data->GeometryIndex = (uint)geometryIndexUint;
}
this.WriteRecord(RecordType.DrawGeometry, (byte *)data, sizeof(DrawGeometryCommand));
}
break;
case RecordType.DrawImage:
{
DrawImageCommand *data = (DrawImageCommand *)(pCur + sizeof(RecordHeader));
var imageSource = (Brush)newContent.DependentLookup(data->ImageSourceIndex);
int imageSourceIndexUint = this.dependentResources.IndexOf(imageSource);
if (imageSourceIndexUint < 0)
{
data->ImageSourceIndex = this.AddDependentResource(imageSource);
}
else
{
data->ImageSourceIndex = (uint)imageSourceIndexUint;
}
this.WriteRecord(RecordType.DrawImage, (byte *)data, sizeof(DrawImageCommand));
}
break;
case RecordType.DrawSlicedImage:
{
DrawSlicedImageCommand *data = (DrawSlicedImageCommand *)(pCur + sizeof(RecordHeader));
var imageSource = (Brush)newContent.DependentLookup(data->ImageSourceIndex);
int imageSourceIndexUint = this.dependentResources.IndexOf(imageSource);
if (imageSourceIndexUint < 0)
{
data->ImageSourceIndex = this.AddDependentResource(imageSource);
}
else
{
data->ImageSourceIndex = (uint)imageSourceIndexUint;
}
this.WriteRecord(RecordType.DrawSlicedImage, (byte *)data, sizeof(DrawSlicedImageCommand));
}
break;
case RecordType.PushClip:
{
PushClipCommand *data = (PushClipCommand *)(pCur + sizeof(RecordHeader));
var geometry = (Geometry)newContent.DependentLookup(data->ClipGeometryIndex);
int geometryIndexUint = this.dependentResources.IndexOf(geometry);
if (geometryIndexUint < 0)
{
data->ClipGeometryIndex = this.AddDependentResource(geometry);
}
else
{
data->ClipGeometryIndex = (uint)geometryIndexUint;
}
this.WriteRecord(RecordType.PushClip, (byte *)data, sizeof(PushClipCommand));
}
break;
case RecordType.Pop:
{
PopCommand *data = (PopCommand *)(pCur + sizeof(RecordHeader));
this.WriteRecord(RecordType.Pop, (byte *)data, 0);
}
break;
default:
{
throw new ArgumentOutOfRangeException();
}
break;
}
pCur += pCurRecord->Size;
}
}
}
}
}