本文整理汇总了C#中Cairo.Context.PaintWithAlpha方法的典型用法代码示例。如果您正苦于以下问题：C# Context.PaintWithAlpha方法的具体用法？C# Context.PaintWithAlpha怎么用？C# Context.PaintWithAlpha使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Cairo.Context的用法示例。
在下文中一共展示了Context.PaintWithAlpha方法的10个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Draw
protected override void Draw(Context cr, Pixbuf prev, Pixbuf next, int width, int height, double progress)
{
cr.Color = new Color (0, 0, 0, progress);
if (next != null) {
double scale = Math.Min ((double)width/(double)next.Width, (double)height/(double)next.Height);
cr.Save ();
cr.Rectangle (0, 0, width, .5 * (height - scale*next.Height));
cr.Fill ();
cr.Rectangle (0, height - .5 * (height - scale*next.Height), width, .5 * (height - scale*next.Height));
cr.Fill ();
cr.Rectangle (0, 0, .5 * (width - scale*next.Width), height);
cr.Fill ();
cr.Rectangle (width - .5 * (width - scale*next.Width), 0, .5 * (width - scale*next.Width), height);
cr.Fill ();
cr.Rectangle (0, 0, width, height);
cr.Scale (scale, scale);
CairoHelper.SetSourcePixbuf (cr, next, .5 * ((double)width/scale - next.Width), .5 * ((double)height/scale - next.Height));
cr.PaintWithAlpha (progress);
cr.Restore ();
}
}示例2: Render
public override void Render(Node node, Context context)
{
ImageNode image = node as ImageNode;
ImageSurface surfaceCache = image.Data as ImageSurface;
if (surfaceCache == null) {
surfaceCache = new ImageSurface (image.File);
}
int x = (int)((image.Width - surfaceCache.Width) * image.XAlign);
int y = (int)((image.Height - surfaceCache.Height) * image.YAlign);
context.SetSourceSurface (surfaceCache, x, y);
double opacity = image.Opacity;
if (opacity == 1)
context.Paint ();
else
context.PaintWithAlpha (image.Opacity);
}示例3: Save
private void Save(string filename,bool bSource,bool bDrawings)
{
Surface pngSurface = new ImageSurface(Format.ARGB32,sourceWidth,sourceHeight);
using(Context c = new Context(pngSurface)) {
if(bSource) {
c.SetSourceSurface(source,0,0);
c.Paint();
}
if(bDrawings) {
c.SetSourceSurface(drawings,0,0);
c.PaintWithAlpha(transparency);
}
}
pngSurface.WriteToPng(filename);
}示例4: DrawWithOperator
public void DrawWithOperator(Context ctx, ImageSurface surface, Operator op, double opacity = 1.0, bool transform = true)
{
ctx.Save ();
if (transform)
ctx.Transform (Transform);
ctx.Operator = op;
ctx.SetSourceSurface (surface, 0, 0);
if (opacity >= 1.0)
ctx.Paint ();
else
ctx.PaintWithAlpha (opacity);
ctx.Restore ();
}示例5: MergeCurrentLayerDown
// Flatten current layer
public void MergeCurrentLayerDown()
{
if (current_layer == 0)
throw new InvalidOperationException ("Cannot flatten layer because current layer is the bottom layer.");
Layer source = CurrentLayer;
Layer dest = Layers[current_layer - 1];
using (Cairo.Context g = new Cairo.Context (dest.Surface)) {
g.SetSource (source.Surface);
g.PaintWithAlpha (source.Opacity);
}
DeleteCurrentLayer ();
}示例6: GetFlattenedImage
public ImageSurface GetFlattenedImage()
{
Cairo.ImageSurface surf = new Cairo.ImageSurface (Cairo.Format.Argb32, ImageSize.Width, ImageSize.Height);
using (Cairo.Context g = new Cairo.Context (surf)) {
foreach (var layer in GetLayersToPaint ()) {
g.SetSource (layer.Surface);
g.PaintWithAlpha (layer.Opacity);
}
}
return surf;
}示例7: FlattenImage
// Flatten image
public void FlattenImage()
{
if (Layers.Count < 2)
throw new InvalidOperationException ("Cannot flatten image because there is only one layer.");
Layer dest = Layers[0];
using (Cairo.Context g = new Cairo.Context (dest.Surface)) {
for (int i = 1; i < Layers.Count; i++) {
Layer source = Layers[i];
g.SetSource (source.Surface);
g.PaintWithAlpha (source.Opacity);
}
}
current_layer = 0;
while (Layers.Count > 1) {
Layer l = Layers[1];
Layers.RemoveAt (1);
}
PintaCore.Layers.OnLayerRemoved ();
Workspace.Invalidate ();
}示例8: FinishSelection
public void FinishSelection()
{
// We don't have an uncommitted layer, abort
if (!ShowSelectionLayer)
return;
FinishPixelsHistoryItem hist = new FinishPixelsHistoryItem ();
hist.TakeSnapshot ();
Layer layer = SelectionLayer;
using (Cairo.Context g = new Cairo.Context (CurrentLayer.Surface)) {
g.Save ();
g.SetSourceSurface (layer.Surface, (int)layer.Offset.X, (int)layer.Offset.Y);
g.PaintWithAlpha (layer.Opacity);
g.Restore ();
}
DestroySelectionLayer ();
Workspace.Invalidate ();
Workspace.History.PushNewItem (hist);
}示例9: GetComputedPixel
/// <summary>
/// Gets the final pixel color for the given point, taking layers, opacity, and blend modes into account.
/// </summary>
public ColorBgra GetComputedPixel (int x, int y)
{
using (var dst = new ImageSurface (Format.Argb32, 1, 1)) {
using (var g = new Context (dst)) {
foreach (var layer in GetLayersToPaint ()) {
var color = layer.Surface.GetColorBgraUnchecked (x, y).ToStraightAlpha ().ToCairoColor ();
g.SetBlendMode (layer.BlendMode);
g.SetSourceColor (color);
g.Rectangle (dst.GetBounds ().ToCairoRectangle ());
g.PaintWithAlpha (layer.Opacity);
}
}
return dst.GetColorBgraUnchecked (0, 0);
}
}示例10: Draw
public void Draw(Context ctx, ImageSurface surface, double opacity)
{
ctx.Save();
ctx.Transform(Transform);
ctx.SetSourceSurface(surface, 0, 0);
ctx.PaintWithAlpha(opacity);
ctx.Restore();
}