public static Image asset(
string name,
Key key = null,
AssetBundle bundle = null,
float?scale = null,
float?width = null,
float?height = null,
Color color = null,
BlendMode colorBlendMode = BlendMode.srcIn,
BoxFit?fit = null,
Alignment alignment = null,
ImageRepeat repeat = ImageRepeat.noRepeat,
Rect centerSlice = null,
bool gaplessPlayback = false,
FilterMode filterMode = FilterMode.Point
)
{
var image = scale != null
? (AssetBundleImageProvider) new ExactAssetImage(name, bundle: bundle, scale: scale.Value)
: new AssetImage(name, bundle: bundle);
return(new Image(
key,
image,
width,
height,
color,
colorBlendMode,
fit,
alignment,
repeat,
centerSlice,
gaplessPlayback,
filterMode
));
}
public static Ink image(
Key key = null,
EdgeInsets padding = null,
ImageProvider image = null,
ColorFilter colorFilter = null,
BoxFit?fit = null,
Alignment alignment = null,
Rect centerSlice = null,
ImageRepeat repeat = ImageRepeat.noRepeat,
double?width = null,
double?height = null,
Widget child = null
)
{
D.assert(padding == null || padding.isNonNegative);
D.assert(image != null);
alignment = alignment ?? Alignment.center;
Decoration decoration = new BoxDecoration(
image: new DecorationImage(
image: image,
colorFilter: colorFilter,
fit: fit,
alignment: alignment,
centerSlice: centerSlice,
repeat: repeat)
);
return(new Ink(
key: key,
padding: padding,
decoration: decoration,
width: width,
height: height,
child: child));
}
public Image(
Key key = null,
ImageProvider image = null,
ImageFrameBuilder frameBuilder = null,
ImageLoadingBuilder loadingBuilder = null,
ImageErrorWidgetBuilder errorBuilder = null,
float?width = null,
float?height = null,
Color color = null,
BlendMode colorBlendMode = BlendMode.srcIn,
BoxFit?fit = null,
AlignmentGeometry alignment = null,
ImageRepeat repeat = ImageRepeat.noRepeat,
Rect centerSlice = null,
bool matchTextDirection = false,
bool gaplessPlayback = false,
FilterQuality filterQuality = FilterQuality.low
) : base(key: key)
{
D.assert(image != null);
this.image = image;
this.frameBuilder = frameBuilder;
this.loadingBuilder = loadingBuilder;
this.errorBuilder = errorBuilder;
this.width = width;
this.height = height;
this.color = color;
this.colorBlendMode = colorBlendMode;
this.fit = fit;
this.alignment = alignment ?? Alignment.center;
this.repeat = repeat;
this.centerSlice = centerSlice;
this.gaplessPlayback = gaplessPlayback;
this.filterQuality = filterQuality;
this.matchTextDirection = matchTextDirection;
}
public static void paintImage(
Canvas canvas = null,
Rect rect = null,
Image image = null,
float scale = 1.0f,
ColorFilter colorFilter = null,
BoxFit?fit = null,
Alignment alignment = null,
Rect centerSlice = null,
ImageRepeat repeat = ImageRepeat.noRepeat,
bool flipHorizontally = false,
bool invertColors = false,
FilterQuality filterQuality = FilterQuality.low
)
{
D.assert(canvas != null);
D.assert(rect != null);
D.assert(image != null);
alignment = alignment ?? Alignment.center;
if (rect.isEmpty)
{
return;
}
Size outputSize = rect.size;
Size inputSize = new Size(image.width, image.height);
Offset sliceBorder = null;
if (centerSlice != null)
{
sliceBorder = new Offset(
centerSlice.left + inputSize.width - centerSlice.right,
centerSlice.top + inputSize.height - centerSlice.bottom
);
outputSize -= sliceBorder;
inputSize -= sliceBorder;
}
fit = fit ?? (centerSlice == null ? BoxFit.scaleDown : BoxFit.fill);
D.assert(centerSlice == null || (fit != BoxFit.none && fit != BoxFit.cover),
() => $"centerSlice was used with a BoxFit {fit} that is not supported.");
FittedSizes fittedSizes = FittedSizes.applyBoxFit(fit.Value, inputSize / scale, outputSize);
Size sourceSize = fittedSizes.source * scale;
Size destinationSize = fittedSizes.destination;
if (centerSlice != null)
{
outputSize += sliceBorder;
destinationSize += sliceBorder;
D.assert(sourceSize == inputSize,
() =>
$"centerSlice was used with a BoxFit {fit} that does not guarantee that the image is fully visible.");
}
if (repeat != ImageRepeat.noRepeat && destinationSize == outputSize)
{
repeat = ImageRepeat.noRepeat;
}
Paint paint = new Paint();
if (colorFilter != null)
{
paint.colorFilter = colorFilter;
}
if (sourceSize != destinationSize)
{
paint.filterQuality = filterQuality;
}
paint.invertColors = invertColors;
float halfWidthDelta = (outputSize.width - destinationSize.width) / 2.0f;
float halfHeightDelta = (outputSize.height - destinationSize.height) / 2.0f;
float dx = halfWidthDelta + (flipHorizontally ? -alignment.x : alignment.x) * halfWidthDelta;
float dy = halfHeightDelta + alignment.y * halfHeightDelta;
Offset destinationPosition = rect.topLeft.translate(dx, dy);
Rect destinationRect = destinationPosition & destinationSize;
bool needSave = repeat != ImageRepeat.noRepeat || flipHorizontally;
if (needSave)
{
canvas.save();
}
if (flipHorizontally)
{
float dxInside = -(rect.left + rect.width / 2.0f);
canvas.translate(-dxInside, 0.0f);
canvas.scale(-1.0f, 1.0f);
canvas.translate(dxInside, 0.0f);
}
if (repeat != ImageRepeat.noRepeat)
{
canvas.clipRect(rect);
}
if (centerSlice == null)
{
Rect sourceRect = alignment.inscribe(
sourceSize, Offset.zero & inputSize
);
if (repeat == ImageRepeat.noRepeat)
{
canvas.drawImageRect(image, sourceRect, destinationRect, paint);
}
else
{
foreach (Rect tileRect in _generateImageTileRects(rect, destinationRect, repeat))
{
canvas.drawImageRect(image, sourceRect, tileRect, paint);
}
}
}
else
{
if (repeat == ImageRepeat.noRepeat)
{
canvas.drawImageNine(image, centerSlice, destinationRect, paint);
}
else
{
foreach (Rect tileRect in _generateImageTileRects(rect, destinationRect, repeat))
{
canvas.drawImageNine(image, centerSlice, tileRect, paint);
}
}
}
if (needSave)
{
canvas.restore();
}
}
public PageImage(ImageFormat im, byte[] image, int w, int h)
{
Debug.Assert(im == ImageFormat.Jpeg || im == ImageFormat.Png || im == ImageFormat.Gif || im == ImageFormat.Wmf,
"PageImage only supports Jpeg, Gif and Png and WMF image formats (Thanks HYNE!).");
imf = im;
imageData = image;
samplesW = w;
samplesH = h;
repeat = ImageRepeat.NoRepeat;
sizing = ImageSizingEnum.AutoSize;
}
public PageImage(ImageFormat im, byte[] image, int w, int h)
{
Debug.Assert(im == ImageFormat.Jpeg || im == ImageFormat.Png,
"PageImage only supports Jpeg and Png image formats.");
imf = im;
imageData = image;
samplesW = w;
samplesH = h;
repeat = ImageRepeat.NoRepeat;
sizing = ImageSizingEnum.AutoSize;
}
/// <summary>
/// Converts an object into its XML representation.
/// </summary>
/// <param name="writer">
/// The <see cref="XmlWriter"></see> stream to which the object is
/// serialized.
/// </param>
void IXmlSerializable.WriteXml(XmlWriter writer)
{
Dictionary <string, string> attributeValues = new Dictionary <string, string>();
if (Font.Name != SystemFonts.DefaultFont.Name)
{
attributeValues.Add("fontName", Font.Name);
}
if (Font.Size != SystemFonts.DefaultFont.Size)
{
attributeValues.Add("fontSize", Font.Size.ToString(CultureInfo.InvariantCulture));
}
if (Font.Style != FontStyle.Regular)
{
attributeValues.Add("fontStyle", Font.Style.ToString());
}
if (BorderWidth > 0)
{
attributeValues.Add("borderWidth", BorderWidth.ToString(CultureInfo.InvariantCulture));
}
if (BorderColor != Color.Empty)
{
attributeValues.Add("borderColor", BorderColor.Name);
}
if (ForeColor != Color.Empty)
{
attributeValues.Add("foreColor", ForeColor.Name);
}
if (BackColor != Color.Empty)
{
attributeValues.Add("backColor", BackColor.Name);
}
if (BackColor2 != Color.Empty && BackColor != BackColor2)
{
attributeValues.Add("backColor2", BackColor2.Name);
}
if (GradientAngle > 0)
{
attributeValues.Add("gradientAngle", GradientAngle.ToString(CultureInfo.InvariantCulture));
}
if (Rotation != 0)
{
attributeValues.Add("rotation", Rotation.ToString(CultureInfo.InvariantCulture));
}
if (!string.IsNullOrEmpty(Image))
{
attributeValues.Add("image", Image);
}
if (ImageRepeat != ImageRepeat.None)
{
attributeValues.Add("imageRepeat", ImageRepeat.ToString());
}
if (attributeValues.Count == 0)
{
return;
}
writer.WriteStartElement("style");
foreach (KeyValuePair <string, string> attribute in attributeValues)
{
writer.WriteAttributeString(attribute.Key, attribute.Value);
}
writer.WriteEndElement();
}
