public void ErrorMessageTest()
{
ReportStart();
_status = new GifComponentStatus( ErrorState.Ok, "message" );
Assert.AreEqual( "message", _status.ErrorMessage );
ReportEnd();
}
public void ErrorMessageTest()
{
ReportStart();
_status = new GifComponentStatus(ErrorState.Ok, "message");
Assert.AreEqual("message", _status.ErrorMessage);
ReportEnd();
}
public void ToStringTest()
{
ReportStart();
_status = new GifComponentStatus(ErrorState.NotANetscapeExtension
| ErrorState.BadDataBlockIntroducer,
"error");
Assert.AreEqual("BadDataBlockIntroducer, NotANetscapeExtension",
_status.ToString());
ReportEnd();
}
public void ErrorStateTest()
{
ReportStart();
foreach (ErrorState state in ErrorState.GetValues(typeof(ErrorState)))
{
_status = new GifComponentStatus(state, "error");
Assert.AreEqual(state, _status.ErrorState);
}
ReportEnd();
}
public void ToStringTest()
{
ReportStart();
_status = new GifComponentStatus( ErrorState.NotANetscapeExtension
| ErrorState.BadDataBlockIntroducer,
"error" );
Assert.AreEqual( "BadDataBlockIntroducer, NotANetscapeExtension",
_status.ToString() );
ReportEnd();
}
public void ErrorStateTest()
{
ReportStart();
foreach( ErrorState state in ErrorState.GetValues( typeof( ErrorState ) ) )
{
_status = new GifComponentStatus( state, "error" );
Assert.AreEqual( state, _status.ErrorState );
}
ReportEnd();
}
/// <summary>
/// Sets the ComponentStatus property of thie GifComponent.
/// </summary>
/// <param name="errorState">
/// A member of the Gif.Components.ErrorState enumeration.
/// </param>
/// <param name="errorMessage">
/// An error message associated with the error state.
/// </param>
protected void SetStatus(ErrorState errorState, string errorMessage)
{
ErrorState newState = _status.ErrorState | errorState;
string newMessage = _status.ErrorMessage;
if (!String.IsNullOrEmpty(newMessage))
{
newMessage += Environment.NewLine;
}
newMessage += errorMessage;
_status = new GifComponentStatus(newState, newMessage);
}
/// <summary>
/// Sets the pixels of the decoded image.
/// </summary>
/// <param name="imageData">
/// Table based image data containing the indices within the active
/// colour table of the colours of the pixels in this frame.
/// </param>
/// <param name="lsd">
/// The logical screen descriptor for the GIF stream.
/// </param>
/// <param name="id">
/// The image descriptor for this frame.
/// </param>
/// <param name="activeColourTable">
/// The colour table to use with this frame - either the global colour
/// table or a local colour table.
/// </param>
/// <param name="gce">
/// The graphic control extension, if any, which precedes this image in
/// the input stream.
/// </param>
/// <param name="previousFrame">
/// The frame which precedes this one in the GIF stream, if present.
/// </param>
/// <param name="previousFrameBut1">
/// The frame which precedes the frame before this one in the GIF stream,
/// if present.
/// </param>
/// <param name="status">
/// GifComponentStatus containing any errors which occurred during the
/// creation of the bitmap.
/// </param>
private static Bitmap CreateBitmap( TableBasedImageData imageData,
LogicalScreenDescriptor lsd,
ImageDescriptor id,
ColourTable activeColourTable,
GraphicControlExtension gce,
GifFrame previousFrame,
GifFrame previousFrameBut1,
out GifComponentStatus status )
{
status = new GifComponentStatus( ErrorState.Ok, "" );
Color[] pixelsForThisFrame = new Color[lsd.LogicalScreenSize.Width
* lsd.LogicalScreenSize.Height];
Bitmap baseImage = GetBaseImage( previousFrame,
previousFrameBut1,
lsd,
gce,
activeColourTable );
// copy each source line to the appropriate place in the destination
int pass = 1;
int interlaceRowIncrement = 8;
int interlaceRowNumber = 0; // the row of pixels we're currently
// setting in an interlaced image.
for( int i = 0; i < id.Size.Height; i++)
{
int pixelRowNumber = i;
if( id.IsInterlaced )
{
#region work out the pixel row we're setting for an interlaced image
if( interlaceRowNumber >= id.Size.Height )
{
pass++;
switch( pass )
{
case 2 :
interlaceRowNumber = 4;
break;
case 3 :
interlaceRowNumber = 2;
interlaceRowIncrement = 4;
break;
case 4 :
interlaceRowNumber = 1;
interlaceRowIncrement = 2;
break;
}
}
#endregion
pixelRowNumber = interlaceRowNumber;
interlaceRowNumber += interlaceRowIncrement;
}
// Colour in the pixels for this row
pixelRowNumber += id.Position.Y;
if( pixelRowNumber < lsd.LogicalScreenSize.Height )
{
int k = pixelRowNumber * lsd.LogicalScreenSize.Width;
int dx = k + id.Position.X; // start of line in dest
int dlim = dx + id.Size.Width; // end of dest line
if( (k + lsd.LogicalScreenSize.Width) < dlim )
{
// TESTME: CreateBitmap - past dest edge
dlim = k + lsd.LogicalScreenSize.Width; // past dest edge
}
int sx = i * id.Size.Width; // start of line in source
while (dx < dlim)
{
// map color and insert in destination
int indexInColourTable = (int) imageData.Pixels[sx++];
// Set this pixel's colour if its index isn't the
// transparent colour index, or if this frame doesn't
// have a transparent colour.
Color c;
if( gce.HasTransparentColour && indexInColourTable == gce.TransparentColourIndex )
{
c = Color.Empty; // transparent pixel
}
else
{
if( indexInColourTable < activeColourTable.Length )
{
c = activeColourTable[indexInColourTable];
}
else
{
// TESTME: CreateBitmap - BadColourIndex
c = Color.Black;
string message
= "Colour index: "
+ indexInColourTable
+ ", colour table length: "
+ activeColourTable.Length
+ " (" + dx + "," + pixelRowNumber + ")";
status = new GifComponentStatus( ErrorState.BadColourIndex,
message );
}
}
pixelsForThisFrame[dx] = c;
dx++;
}
}
}
return CreateBitmap( baseImage, pixelsForThisFrame );
}
/// <summary>
/// Constructor.
/// This is implicitly called by constructors of derived types.
/// </summary>
protected GifComponent()
{
_status = new GifComponentStatus(ErrorState.Ok, "");
}
/// <summary>
/// Sets the ComponentStatus property of thie GifComponent.
/// </summary>
/// <param name="errorState">
/// A member of the Gif.Components.ErrorState enumeration.
/// </param>
/// <param name="errorMessage">
/// An error message associated with the error state.
/// </param>
protected void SetStatus( ErrorState errorState, string errorMessage )
{
ErrorState newState = _status.ErrorState | errorState;
string newMessage = _status.ErrorMessage;
if( !String.IsNullOrEmpty( newMessage ) )
{
newMessage += Environment.NewLine;
}
newMessage += errorMessage;
_status = new GifComponentStatus( newState, newMessage );
if( _xmlDebugging )
{
WriteDebugXmlErrorState( errorState, errorMessage );
}
}
/// <summary>
/// Constructor.
/// This is implicitly called by constructors of derived types.
/// </summary>
protected GifComponent()
{
_status = new GifComponentStatus( ErrorState.Ok, "" );
}
/// <summary>
/// Sets the pixels of the decoded image.
/// </summary>
/// <param name="imageData">
/// Table based image data containing the indices within the active
/// colour table of the colours of the pixels in this frame.
/// </param>
/// <param name="lsd">
/// The logical screen descriptor for the GIF stream.
/// </param>
/// <param name="id">
/// The image descriptor for this frame.
/// </param>
/// <param name="activeColourTable">
/// The colour table to use with this frame - either the global colour
/// table or a local colour table.
/// </param>
/// <param name="gce">
/// The graphic control extension, if any, which precedes this image in
/// the input stream.
/// </param>
/// <param name="previousFrame">
/// The frame which precedes this one in the GIF stream, if present.
/// </param>
/// <param name="previousFrameBut1">
/// The frame which precedes the frame before this one in the GIF stream,
/// if present.
/// </param>
/// <param name="status">
/// GifComponentStatus containing any errors which occurred during the
/// creation of the bitmap.
/// </param>
private static Bitmap CreateBitmap(TableBasedImageData imageData,
LogicalScreenDescriptor lsd,
ImageDescriptor id,
ColourTable activeColourTable,
GraphicControlExtension gce,
GifFrame previousFrame,
GifFrame previousFrameBut1,
out GifComponentStatus status)
{
status = new GifComponentStatus(ErrorState.Ok, "");
Color[] pixelsForThisFrame = new Color[lsd.LogicalScreenSize.Width
* lsd.LogicalScreenSize.Height];
Bitmap baseImage = GetBaseImage(previousFrame,
previousFrameBut1,
lsd,
gce,
activeColourTable);
// copy each source line to the appropriate place in the destination
int pass = 1;
int interlaceRowIncrement = 8;
int interlaceRowNumber = 0; // the row of pixels we're currently
// setting in an interlaced image.
for (int i = 0; i < id.Size.Height; i++)
{
int pixelRowNumber = i;
if (id.IsInterlaced)
{
#region work out the pixel row we're setting for an interlaced image
if (interlaceRowNumber >= id.Size.Height)
{
pass++;
switch (pass)
{
case 2:
interlaceRowNumber = 4;
break;
case 3:
interlaceRowNumber = 2;
interlaceRowIncrement = 4;
break;
case 4:
interlaceRowNumber = 1;
interlaceRowIncrement = 2;
break;
}
}
#endregion
pixelRowNumber = interlaceRowNumber;
interlaceRowNumber += interlaceRowIncrement;
}
// Colour in the pixels for this row
pixelRowNumber += id.Position.Y;
if (pixelRowNumber < lsd.LogicalScreenSize.Height)
{
int k = pixelRowNumber * lsd.LogicalScreenSize.Width;
int dx = k + id.Position.X; // start of line in dest
int dlim = dx + id.Size.Width; // end of dest line
if ((k + lsd.LogicalScreenSize.Width) < dlim)
{
// TESTME: CreateBitmap - past dest edge
dlim = k + lsd.LogicalScreenSize.Width; // past dest edge
}
int sx = i * id.Size.Width; // start of line in source
while (dx < dlim)
{
// map color and insert in destination
int indexInColourTable = (int)imageData.Pixels[sx++];
// Set this pixel's colour if its index isn't the
// transparent colour index, or if this frame doesn't
// have a transparent colour.
Color c;
if (gce.HasTransparentColour && indexInColourTable == gce.TransparentColourIndex)
{
c = Color.Empty; // transparent pixel
}
else
{
if (indexInColourTable < activeColourTable.Length)
{
c = activeColourTable[indexInColourTable];
}
else
{
// TESTME: CreateBitmap - BadColourIndex
c = Color.Black;
string message
= "Colour index: "
+ indexInColourTable
+ ", colour table length: "
+ activeColourTable.Length
+ " (" + dx + "," + pixelRowNumber + ")";
status = new GifComponentStatus(ErrorState.BadColourIndex,
message);
}
}
pixelsForThisFrame[dx] = c;
dx++;
}
}
}
return(CreateBitmap(baseImage, pixelsForThisFrame));
}
