internal void NormalizeFrom(ImageFileInfo img)
{
Contract.Requires <InvalidOperationException>(Width >= 0 && Height >= 0, "Width and Height cannot be negative");
Contract.Requires <InvalidOperationException>(ResizeMode == CropScaleMode.Crop || (Width > 0 && Height > 0), "Width and Height must be > 0 with Stretch and Max Modes");
Contract.Assert(FrameIndex < img.Frames.Length || img.Frames.Length + FrameIndex < 0, "Invalid FrameIndex");
if (FrameIndex < 0)
{
FrameIndex = img.Frames.Length + FrameIndex;
}
var frame = img.Frames[FrameIndex];
if (SaveFormat == FileFormat.Auto)
{
if (img.ContainerType == FileFormat.Gif) // Restrict to animated only?
{
SaveFormat = FileFormat.Gif;
}
else if (img.ContainerType == FileFormat.Png || (frame.HasAlpha && MatteColor.A < 255))
{
SaveFormat = FileFormat.Png;
}
else
{
SaveFormat = FileFormat.Jpeg;
}
}
if (SaveFormat != FileFormat.Jpeg)
{
JpegSubsampleMode = ChromaSubsampleMode.Default;
JpegQuality = 0;
}
if (!frame.HasAlpha)
{
MatteColor = Color.Empty;
}
if (!Sharpen)
{
UnsharpMask = UnsharpMaskSettings.None;
}
Fixup(frame.Width, frame.Height, frame.Rotated90);
imageInfo = img;
}
internal void NormalizeFrom(ImageFileInfo img)
{
if (Width < 0 || Height < 0)
{
throw new InvalidOperationException($"{nameof(Width)} and {nameof(Height)} cannot be negative");
}
if (Width == 0 && Height == 0)
{
throw new InvalidOperationException($"{nameof(Width)} and {nameof(Height)} may not both be 0");
}
if ((Width == 0 || Height == 0) && ResizeMode != CropScaleMode.Crop)
{
throw new InvalidOperationException($"{nameof(Width)} or {nameof(Height)} may only be 0 in {nameof(CropScaleMode.Crop)} mode");
}
if (FrameIndex >= img.Frames.Length || img.Frames.Length + FrameIndex < 0)
{
throw new InvalidOperationException($"Invalid {nameof(FrameIndex)}");
}
if (FrameIndex < 0)
{
FrameIndex = img.Frames.Length + FrameIndex;
}
var frame = img.Frames[FrameIndex];
if (SaveFormat == FileFormat.Auto)
{
if (img.ContainerType == FileFormat.Gif) // Restrict to animated only?
{
SaveFormat = FileFormat.Gif;
}
else if (img.ContainerType == FileFormat.Png || (frame.HasAlpha && MatteColor.A < byte.MaxValue))
{
SaveFormat = FileFormat.Png;
}
else
{
SaveFormat = FileFormat.Jpeg;
}
}
if (SaveFormat != FileFormat.Jpeg)
{
JpegSubsampleMode = ChromaSubsampleMode.Default;
JpegQuality = 0;
}
if (!frame.HasAlpha)
{
MatteColor = Color.Empty;
}
if (!Sharpen)
{
UnsharpMask = UnsharpMaskSettings.None;
}
Fixup(frame.Width, frame.Height, frame.Rotated90);
imageInfo = img;
}