/
Document.cs
754 lines (577 loc) · 17.9 KB
/
Document.cs
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//
// Document.cs
//
// Author:
// Jonathan Pobst <monkey@jpobst.com>
//
// Copyright (c) 2010 Jonathan Pobst
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.Linq;
using Mono.Unix;
using Gdk;
using System.Collections.Generic;
using Cairo;
using System.ComponentModel;
namespace Pinta.Core
{
// The differentiation between Document and DocumentWorkspace is
// somewhat arbitrary. In general:
// Document - Data about the image itself
// Workspace - Data about Pinta's state for the image
public class Document
{
private string filename;
private bool is_dirty;
private int layer_name_int = 2;
private int current_layer = -1;
// The layer for tools to use until their output is committed
private Layer tool_layer;
// The layer used for selections
private Layer selection_layer;
private int selection_layer_index;
private bool show_selection;
public DocumentSelection Selection = new DocumentSelection();
public Document (Gdk.Size size)
{
Guid = Guid.NewGuid ();
Workspace = new DocumentWorkspace (this);
IsDirty = false;
HasFile = false;
ImageSize = size;
Layers = new List<Layer> ();
tool_layer = CreateLayer ("Tool Layer");
tool_layer.Hidden = true;
selection_layer = CreateLayer ("Selection Layer");
selection_layer.Hidden = true;
ResetSelectionPath ();
}
#region Public Properties
public Layer CurrentLayer {
get { return Layers[current_layer]; }
}
public int CurrentLayerIndex {
get { return current_layer; }
}
/// <summary>
/// Just the file name, like "dog.jpg".
/// </summary>
public string Filename {
get { return filename; }
set {
if (filename != value) {
filename = value;
OnRenamed ();
}
}
}
public Guid Guid { get; private set; }
public bool HasFile { get; set; }
public DocumentWorkspaceHistory History { get { return Workspace.History; } }
public Gdk.Size ImageSize { get; set; }
public bool IsDirty {
get { return is_dirty; }
set {
if (is_dirty != value) {
is_dirty = value;
OnIsDirtyChanged ();
}
}
}
public List<Layer> Layers { get; private set; }
/// <summary>
/// Just the directory name, like "C:\MyPictures".
/// </summary>
public string Pathname { get; set; }
/// <summary>
/// Directory and file name, like "C:\MyPictures\dog.jpg".
/// </summary>
public string PathAndFileName {
get { return System.IO.Path.Combine (Pathname, Filename); }
set {
if (string.IsNullOrEmpty (value)) {
Pathname = string.Empty;
Filename = string.Empty;
} else {
Pathname = System.IO.Path.GetDirectoryName (value);
Filename = System.IO.Path.GetFileName (value);
}
}
}
public Layer SelectionLayer {
get { return selection_layer; }
}
public bool ShowSelection {
get { return show_selection; }
set {
show_selection = value;
PintaCore.Actions.Edit.Deselect.Sensitive = show_selection;
PintaCore.Actions.Edit.EraseSelection.Sensitive = show_selection;
PintaCore.Actions.Edit.FillSelection.Sensitive = show_selection;
PintaCore.Actions.Image.CropToSelection.Sensitive = show_selection;
}
}
public bool ShowSelectionLayer { get; set; }
public Layer ToolLayer {
get {
if (tool_layer.Surface.Width != ImageSize.Width || tool_layer.Surface.Height != ImageSize.Height) {
(tool_layer.Surface as IDisposable).Dispose ();
tool_layer = CreateLayer ("Tool Layer");
tool_layer.Hidden = true;
}
return tool_layer;
}
}
public DocumentWorkspace Workspace { get; private set; }
#endregion
#region Public Methods
// Adds a new layer above the current one
public Layer AddNewLayer (string name)
{
Layer layer;
if (string.IsNullOrEmpty (name))
layer = CreateLayer ();
else
layer = CreateLayer (name);
Layers.Insert (current_layer + 1, layer);
if (Layers.Count == 1)
current_layer = 0;
layer.PropertyChanged += RaiseLayerPropertyChangedEvent;
PintaCore.Layers.OnLayerAdded ();
return layer;
}
public Gdk.Rectangle ClampToImageSize (Gdk.Rectangle r)
{
int x = Utility.Clamp (r.X, 0, ImageSize.Width);
int y = Utility.Clamp (r.Y, 0, ImageSize.Height);
int width = Math.Min (r.Width, ImageSize.Width - x);
int height = Math.Min (r.Height, ImageSize.Height - y);
return new Gdk.Rectangle (x, y, width, height);
}
public void Clear ()
{
while (Layers.Count > 0) {
Layer l = Layers[Layers.Count - 1];
Layers.RemoveAt (Layers.Count - 1);
(l.Surface as IDisposable).Dispose ();
}
current_layer = -1;
PintaCore.Layers.OnLayerRemoved ();
}
// Clean up any native resources we had
public void Close ()
{
// Dispose all of our layers
while (Layers.Count > 0) {
Layer l = Layers[Layers.Count - 1];
Layers.RemoveAt (Layers.Count - 1);
(l.Surface as IDisposable).Dispose ();
}
current_layer = -1;
if (tool_layer != null)
(tool_layer.Surface as IDisposable).Dispose ();
if (selection_layer != null)
(selection_layer.Surface as IDisposable).Dispose ();
Selection.DisposeSelection();
Workspace.History.Clear ();
}
public Context CreateClippedContext ()
{
Context g = new Context (CurrentLayer.Surface);
g.AppendPath (Selection.SelectionPath);
g.FillRule = Cairo.FillRule.EvenOdd;
g.Clip ();
return g;
}
public Context CreateClippedContext (bool antialias)
{
Context g = new Context (CurrentLayer.Surface);
g.AppendPath(Selection.SelectionPath);
g.FillRule = Cairo.FillRule.EvenOdd;
g.Clip ();
g.Antialias = antialias ? Antialias.Subpixel : Antialias.None;
return g;
}
public Context CreateClippedToolContext ()
{
Context g = new Context (ToolLayer.Surface);
g.AppendPath(Selection.SelectionPath);
g.FillRule = Cairo.FillRule.EvenOdd;
g.Clip ();
return g;
}
public Context CreateClippedToolContext (bool antialias)
{
Context g = new Context (ToolLayer.Surface);
g.AppendPath(Selection.SelectionPath);
g.FillRule = Cairo.FillRule.EvenOdd;
g.Clip ();
g.Antialias = antialias ? Antialias.Subpixel : Antialias.None;
return g;
}
public Layer CreateLayer ()
{
return CreateLayer (string.Format ("{0} {1}", Catalog.GetString ("Layer"), layer_name_int++));
}
public Layer CreateLayer (string name)
{
return CreateLayer (name, ImageSize.Width, ImageSize.Height);
}
public Layer CreateLayer (string name, int width, int height)
{
Cairo.ImageSurface surface = new Cairo.ImageSurface (Cairo.Format.ARGB32, width, height);
Layer layer = new Layer (surface) { Name = name };
return layer;
}
public void CreateSelectionLayer ()
{
Layer old = selection_layer;
selection_layer = CreateLayer ();
selection_layer_index = current_layer + 1;
if (old != null)
(old.Surface as IDisposable).Dispose ();
}
// Delete the current layer
public void DeleteCurrentLayer ()
{
Layer layer = CurrentLayer;
Layers.RemoveAt (current_layer);
// Only change this if this wasn't already the bottom layer
if (current_layer > 0)
current_layer--;
layer.PropertyChanged -= RaiseLayerPropertyChangedEvent;
PintaCore.Layers.OnLayerRemoved ();
}
// Delete the layer
public void DeleteLayer (int index, bool dispose)
{
Layer layer = Layers[index];
Layers.RemoveAt (index);
if (dispose)
(layer.Surface as IDisposable).Dispose ();
// Only change this if this wasn't already the bottom layer
if (current_layer > 0)
current_layer--;
layer.PropertyChanged -= RaiseLayerPropertyChangedEvent;
PintaCore.Layers.OnLayerRemoved ();
}
public void DestroySelectionLayer ()
{
ShowSelectionLayer = false;
SelectionLayer.Clear ();
SelectionLayer.Offset = new PointD (0, 0);
}
// Duplicate current layer
public Layer DuplicateCurrentLayer ()
{
Layer source = CurrentLayer;
Layer layer = CreateLayer (string.Format ("{0} {1}", source.Name, Catalog.GetString ("copy")));
using (Cairo.Context g = new Cairo.Context (layer.Surface)) {
g.SetSource (source.Surface);
g.Paint ();
}
layer.Hidden = source.Hidden;
layer.Opacity = source.Opacity;
layer.Tiled = source.Tiled;
Layers.Insert (++current_layer, layer);
layer.PropertyChanged += RaiseLayerPropertyChangedEvent;
PintaCore.Layers.OnLayerAdded ();
return layer;
}
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);
}
// Flatten image
public void FlattenImage ()
{
if (Layers.Count < 2)
throw new InvalidOperationException ("Cannot flatten image because there is only one layer.");
// Find the "bottom" layer
var bottom_layer = Layers[0];
var old_surf = bottom_layer.Surface;
// Replace the bottom surface with the flattened image,
// and dispose the old surface
bottom_layer.Surface = GetFlattenedImage ();
(old_surf as IDisposable).Dispose ();
// Reset our layer pointer to the only remaining layer
current_layer = 0;
// Delete all other layers
while (Layers.Count > 1)
Layers.RemoveAt (1);
PintaCore.Layers.OnLayerRemoved ();
Workspace.Invalidate ();
}
// Flip image horizontally
public void FlipImageHorizontal ()
{
foreach (var layer in Layers)
layer.FlipHorizontal ();
Workspace.Invalidate ();
}
// Flip image vertically
public void FlipImageVertical ()
{
foreach (var layer in Layers)
layer.FlipVertical ();
Workspace.Invalidate ();
}
public ImageSurface GetClippedLayer (int index)
{
Cairo.ImageSurface surf = new Cairo.ImageSurface (Cairo.Format.Argb32, ImageSize.Width, ImageSize.Height);
using (Cairo.Context g = new Cairo.Context (surf)) {
g.AppendPath(Selection.SelectionPath);
g.Clip ();
g.SetSource (Layers[index].Surface);
g.Paint ();
}
return surf;
}
/// <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)
{
var pixel = ColorBgra.Zero;
foreach (var layer in GetLayersToPaint ()) {
var blend_op = UserBlendOps.GetBlendOp (layer.BlendMode, layer.Opacity);
pixel = blend_op.Apply (pixel, layer.Surface.GetColorBgra (x, y));
}
return pixel;
}
public ImageSurface GetFlattenedImage ()
{
// Create a new image surface
var surf = new Cairo.ImageSurface (Cairo.Format.Argb32, ImageSize.Width, ImageSize.Height);
// Blend each visible layer onto our surface
foreach (var layer in GetLayersToPaint ()) {
var blendop = UserBlendOps.GetBlendOp (layer.BlendMode, layer.Opacity);
blendop.Apply (surf, layer.Surface);
}
surf.MarkDirty ();
return surf;
}
public List<Layer> GetLayersToPaint ()
{
List<Layer> paint = new List<Layer> ();
foreach (var layer in Layers) {
if (!layer.Hidden)
paint.Add (layer);
if (layer == CurrentLayer) {
if (!tool_layer.Hidden)
paint.Add (tool_layer);
if (ShowSelectionLayer)
paint.Add (selection_layer);
}
}
return paint;
}
/// <param name="canvasOnly">false for the whole selection, true for the part only on our canvas</param>
public Gdk.Rectangle GetSelectedBounds (bool canvasOnly)
{
var bounds = Selection.SelectionPath.GetBounds();
if (canvasOnly)
bounds = ClampToImageSize (bounds);
return bounds;
}
public int IndexOf (Layer layer)
{
return Layers.IndexOf (layer);
}
// Adds a new layer above the current one
public void Insert (Layer layer, int index)
{
Layers.Insert (index, layer);
if (Layers.Count == 1)
current_layer = 0;
layer.PropertyChanged += RaiseLayerPropertyChangedEvent;
PintaCore.Layers.OnLayerAdded ();
}
// Flatten current layer
public void MergeCurrentLayerDown ()
{
if (current_layer == 0)
throw new InvalidOperationException ("Cannot flatten layer because current layer is the bottom layer.");
// Get our source and destination layers
var source = CurrentLayer;
var dest = Layers[current_layer - 1];
// Blend the layers
var blendop = UserBlendOps.GetBlendOp (source.BlendMode, source.Opacity);
blendop.Apply (dest.Surface, source.Surface);
DeleteCurrentLayer ();
}
// Move current layer down
public void MoveCurrentLayerDown ()
{
if (current_layer == 0)
throw new InvalidOperationException ("Cannot move layer down because current layer is the bottom layer.");
Layer layer = CurrentLayer;
Layers.RemoveAt (current_layer);
Layers.Insert (--current_layer, layer);
PintaCore.Layers.OnSelectedLayerChanged ();
Workspace.Invalidate ();
}
// Move current layer up
public void MoveCurrentLayerUp ()
{
if (current_layer == Layers.Count)
throw new InvalidOperationException ("Cannot move layer up because current layer is the top layer.");
Layer layer = CurrentLayer;
Layers.RemoveAt (current_layer);
Layers.Insert (++current_layer, layer);
PintaCore.Layers.OnSelectedLayerChanged ();
Workspace.Invalidate ();
}
public void ResetSelectionPath()
{
Selection.DisposeSelectionPreserve();
Selection.ResetSelection(selection_layer.Surface, ImageSize);
ShowSelection = false;
}
/// <summary>
/// Resizes the canvas.
/// </summary>
/// <param name='compoundAction'>
/// Optionally, the history item for resizing the canvas can be added to
/// a CompoundHistoryItem if it is part of a larger action (e.g. pasting an image).
/// </param>
public void ResizeCanvas (int width, int height, Anchor anchor, CompoundHistoryItem compoundAction)
{
double scale;
if (ImageSize.Width == width && ImageSize.Height == height)
return;
PintaCore.Tools.Commit ();
ResizeHistoryItem hist = new ResizeHistoryItem (ImageSize);
hist.Icon = "Menu.Image.CanvasSize.png";
hist.Text = Catalog.GetString ("Resize Canvas");
hist.StartSnapshotOfImage ();
scale = Workspace.Scale;
ImageSize = new Gdk.Size (width, height);
foreach (var layer in Layers)
layer.ResizeCanvas (width, height, anchor);
hist.FinishSnapshotOfImage ();
if (compoundAction != null) {
compoundAction.Push (hist);
} else {
Workspace.History.PushNewItem (hist);
}
ResetSelectionPath ();
Workspace.Scale = scale;
}
public void ResizeImage (int width, int height)
{
double scale;
if (ImageSize.Width == width && ImageSize.Height == height)
return;
PintaCore.Tools.Commit ();
ResizeHistoryItem hist = new ResizeHistoryItem (ImageSize);
hist.StartSnapshotOfImage ();
scale = Workspace.Scale;
ImageSize = new Gdk.Size (width, height);
foreach (var layer in Layers)
layer.Resize (width, height);
hist.FinishSnapshotOfImage ();
Workspace.History.PushNewItem (hist);
ResetSelectionPath ();
Workspace.Scale = scale;
}
// Rotate image 180 degrees (flip H+V)
public void RotateImage180 ()
{
RotateImage (180);
}
public void RotateImageCW ()
{
RotateImage (90);
}
public void RotateImageCCW ()
{
RotateImage (-90);
}
/// <summary>
/// Rotates the image by the specified angle (in degrees)
/// </summary>
private void RotateImage (double angle)
{
foreach (var layer in Layers)
{
layer.Rotate (angle);
}
ImageSize = Layer.RotateDimensions (ImageSize, angle);
Workspace.CanvasSize = Layer.RotateDimensions (Workspace.CanvasSize, angle);
PintaCore.Actions.View.UpdateCanvasScale ();
Workspace.Invalidate ();
}
// Returns true if successful, false if canceled
public bool Save (bool saveAs)
{
return PintaCore.Actions.File.RaiseSaveDocument (this, saveAs);
}
public void SetCurrentLayer (int i)
{
// Ensure that the current tool's modifications are finalized before
// switching layers.
PintaCore.Tools.CurrentTool.DoCommit ();
current_layer = i;
PintaCore.Layers.OnSelectedLayerChanged ();
}
public void SetCurrentLayer (Layer layer)
{
SetCurrentLayer (Layers.IndexOf (layer));
}
#endregion
#region Protected Methods
protected void OnIsDirtyChanged ()
{
if (IsDirtyChanged != null)
IsDirtyChanged (this, EventArgs.Empty);
}
protected void OnRenamed ()
{
if (Renamed != null)
Renamed (this, EventArgs.Empty);
}
#endregion
#region Private Methods
private void RaiseLayerPropertyChangedEvent (object sender, PropertyChangedEventArgs e)
{
PintaCore.Layers.RaiseLayerPropertyChangedEvent (sender, e);
}
#endregion
#region Public Events
public event EventHandler IsDirtyChanged;
public event EventHandler Renamed;
#endregion
}
}