/// <summary>
/// Raised when a new index is selected from ImageSelector.
/// Loads the GIF file of that filename.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The event data.</param>
private void ImageSelector_SelectedIndexChanged(object sender, EventArgs e)
{
if (!SavePrompt())
return;
loaded = false;
changed = false;
filePath = Path.Combine(filesPath, (string)ImageSelector.Items[ImageSelector.SelectedIndex]);
if (gifImage != null)
foreach (GifFrame<Bitmap> frame in gifImage.Frames)
frame.Image.Dispose();
if (desiredFrames != null)
foreach (Bitmap frame in desiredFrames)
frame.Dispose();
gifImage = null;
frameIndex = -1;
desiredFrames = null;
ImageComparison.Panel1.BackgroundImage = null;
ImageComparison.Panel2.BackgroundImage = null;
ImageSourceColor.BackColor = Color.Transparent;
ImageDesiredColor.BackColor = Color.Transparent;
ImageSourcePalette.BackColor = PaletteControls.BackColor;
ImageDesiredPalette.BackColor = PaletteControls.BackColor;
ImageSourcePalette.Controls.Clear();
ImageDesiredPalette.Controls.Clear();
foreach (Panel panel in sourceSwatches)
panel.Dispose();
foreach (Panel panel in desiredSwatches)
panel.Dispose();
sourceSwatches.Clear();
desiredSwatches.Clear();
SourceAlphaCode.ResetText();
SourceColorCode.ResetText();
DesiredAlphaCode.ResetText();
DesiredColorCode.ResetText();
FrameControls.Enabled = false;
PaletteControls.Enabled = false;
ColorControls.Enabled = false;
ErrorLabel.Visible = false;
currentColor = Color.Empty;
FileStream gifStream = null;
try
{
gifStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read);
gifImage = GifImage.OfBitmap(gifStream);
}
catch (Exception)
{
Console.WriteLine("An error occurred attempting to load the file: " + filePath);
ShowError("An error occurred attempting to load this file.");
return;
}
finally
{
if (gifStream != null)
gifStream.Dispose();
}
Indexer.UseTimingsFrom(gifImage);
AlphaRemappingTable map = new AlphaRemappingTable();
string mapFile = Path.ChangeExtension(filePath, AlphaRemappingTable.FileExtension);
if (File.Exists(mapFile))
map.LoadMap(mapFile);
colorMappingTable.Clear();
foreach (var frame in gifImage.Frames)
BuildColorMap(frame.GetColorTable(), map);
sourceSwatches.Capacity = colorMappingTable.Count;
desiredSwatches.Capacity = colorMappingTable.Count;
int swatchSize = ImageSourcePalette.Height - 2;
Size size = new Size(swatchSize, swatchSize);
Point location = new Point(1, 1);
ImageSourcePalette.SuspendLayout();
ImageDesiredPalette.SuspendLayout();
int mappingIndex = 0;
foreach (var colorMapping in colorMappingTable)
{
Panel sourcePanel = new Panel() { Size = size, Location = location };
Panel desiredPanel = new Panel() { Size = size, Location = location };
sourcePanel.Tag = desiredPanel;
desiredPanel.Tag = sourcePanel;
sourceSwatches.Add(sourcePanel);
desiredSwatches.Add(desiredPanel);
ImageSourcePalette.Controls.Add(sourcePanel);
ImageDesiredPalette.Controls.Add(desiredPanel);
sourceSwatches[mappingIndex].Click += Swatch_Clicked;
desiredSwatches[mappingIndex].Click += Swatch_Clicked;
sourceSwatches[mappingIndex].BackColor = colorMapping.Key;
desiredSwatches[mappingIndex].BackColor = colorMapping.Value;
if (mappingIndex == 0)
currentColor = colorMapping.Key;
mappingIndex++;
location.X += swatchSize + 1;
}
location.Y = 0;
Panel blankSourcePanel =
new Panel() { Size = ImageSourcePalette.Size, Location = location, BackColor = SystemColors.Control };
ImageSourcePalette.Controls.Add(blankSourcePanel);
Panel blankDesiredPanel =
new Panel() { Size = ImageDesiredPalette.Size, Location = location, BackColor = SystemColors.Control };
ImageDesiredPalette.Controls.Add(blankDesiredPanel);
ImageSourcePalette.ResumeLayout();
ImageDesiredPalette.ResumeLayout();
ImageSourcePalette.BackColor = ImageComparison.BackColor;
ImageDesiredPalette.BackColor = ImageComparison.BackColor;
desiredFrames = new Bitmap[gifImage.Frames.Length];
for (int i = 0; i < desiredFrames.Length; i++)
desiredFrames[i] = (Bitmap)gifImage.Frames[i].Image.Clone();
UpdateDesiredFrames();
FrameControls.Enabled = true;
PaletteControls.Enabled = true;
ColorControls.Enabled = true;
SaveCommand.Enabled = true;
UpdateSelectedFrame(0);
UpdateColorHex();
UpdateColorDisplay();
loaded = true;
}
/// <summary>
/// Creates a new <see cref="T:DesktopSprites.SpriteManagement.BitmapFrame"/> from the raw buffer, loading extra transparency
/// information and adjusting the colors as required by the transparency.
/// </summary>
/// <param name="buffer">The raw buffer.</param>
/// <param name="palette">The color palette.</param>
/// <param name="transparentIndex">The index of the transparent color.</param>
/// <param name="stride">The stride width of the buffer.</param>
/// <param name="width">The logical width of the buffer.</param>
/// <param name="height">The logical height of the buffer.</param>
/// <param name="depth">The bit depth of the buffer.</param>
/// <param name="hashCode">The hash code of the frame.</param>
/// <param name="fileName">The path to the GIF file being loaded.</param>
/// <returns>A new <see cref="T:DesktopSprites.SpriteManagement.BitmapFrame"/> for the frame held in the raw buffer.</returns>
private BitmapFrame BitmapFrameFromBuffer(byte[] buffer, RgbColor[] palette, int transparentIndex,
int stride, int width, int height, int depth, int hashCode, string fileName)
{
return Disposable.SetupSafely(
BitmapFrame.FromBuffer(buffer, palette, transparentIndex, stride, width, height, depth, hashCode),
frame =>
{
if (IsAlphaBlended)
{
// Check for an alpha remapping table, and apply it if one exists.
string mapFilePath = Path.ChangeExtension(fileName, AlphaRemappingTable.FileExtension);
if (File.Exists(mapFilePath))
{
AlphaRemappingTable map = new AlphaRemappingTable();
map.LoadMap(mapFilePath);
ColorPalette colorPalette = frame.Image.Palette;
for (int i = 0; i < colorPalette.Entries.Length; i++)
{
Color color = colorPalette.Entries[i];
ArgbColor argbColor;
if (map.TryGetMapping(new RgbColor(color.R, color.G, color.B), out argbColor))
colorPalette.Entries[i] = Color.FromArgb(argbColor.ToArgb());
}
frame.Image.Palette = colorPalette;
// We only need to pre-multiply when we add an alpha channel ourselves, as GIFs only support 1 bit transparency.
frame.Image.PreMultiplyAlpha();
}
}
else
{
frame.Image.RemapColors(paletteMapping);
}
});
}
