internal override Set <SavableBitDepths> CreateAllowedBitDepthListFromToken(PropertyBasedSaveConfigToken token)
{
PngBitDepthUIChoices bitDepthFromToken = (PngBitDepthUIChoices)token.GetProperty <StaticListChoiceProperty>(PropertyNames.BitDepth).Value;
Set <SavableBitDepths> bitDepths = new Set <SavableBitDepths>();
switch (bitDepthFromToken)
{
case PngBitDepthUIChoices.AutoDetect:
bitDepths.AddRange(SavableBitDepths.Rgb24, SavableBitDepths.Rgb8, SavableBitDepths.Rgba32, SavableBitDepths.Rgba8);
break;
case PngBitDepthUIChoices.Bpp24:
bitDepths.AddRange(SavableBitDepths.Rgb24);
break;
case PngBitDepthUIChoices.Bpp32:
bitDepths.AddRange(SavableBitDepths.Rgba32);
break;
case PngBitDepthUIChoices.Bpp8:
bitDepths.AddRange(SavableBitDepths.Rgb8, SavableBitDepths.Rgba8);
break;
default:
throw new InvalidEnumArgumentException("bitDepthFromToken", (int)bitDepthFromToken, typeof(PngBitDepthUIChoices));
}
return(bitDepths);
}
internal override void FinalSave(
Document input,
Stream output,
Surface scratchSurface,
int ditherLevel,
SavableBitDepths bitDepth,
PropertyBasedSaveConfigToken token,
ProgressEventHandler progressCallback)
{
bool enableAlpha;
switch (bitDepth)
{
case SavableBitDepths.Rgb8:
enableAlpha = false;
break;
case SavableBitDepths.Rgba8:
enableAlpha = true;
break;
default:
throw new InvalidEnumArgumentException("bitDepth", (int)bitDepth, typeof(SavableBitDepths));
}
using (Bitmap quantized = Quantize(scratchSurface, ditherLevel, 256, enableAlpha, progressCallback))
{
quantized.Save(output, ImageFormat.Gif);
}
}
protected override bool IsReflexive(PropertyBasedSaveConfigToken token)
{
PngBitDepthUIChoices bitDepth = (PngBitDepthUIChoices)token.GetProperty <StaticListChoiceProperty>(PropertyNames.BitDepth).Value;
// Only 32-bit is reflexive
return(bitDepth == PngBitDepthUIChoices.Bpp32);
}
internal abstract void FinalSave(
Document input,
Stream output,
Surface scratchSurface,
int ditherLevel,
SavableBitDepths bitDepth,
PropertyBasedSaveConfigToken token,
ProgressEventHandler progressCallback);
internal override Set <SavableBitDepths> CreateAllowedBitDepthListFromToken(PropertyBasedSaveConfigToken token)
{
var bitDepths = new Set <SavableBitDepths>();
bitDepths.Add(SavableBitDepths.Rgb8);
bitDepths.Add(SavableBitDepths.Rgba8);
return(bitDepths);
}
internal override void FinalSave(
Document input,
Stream output,
Surface scratchSurface,
int ditherLevel,
SavableBitDepths bitDepth,
PropertyBasedSaveConfigToken token,
ProgressEventHandler progressCallback)
{
// finally, do the save.
if (bitDepth == SavableBitDepths.Rgb24)
{
// In order to save memory, we 'squish' the 32-bit bitmap down to 24-bit in-place
// instead of allocating a new bitmap and copying it over.
SquishSurfaceTo24Bpp(scratchSurface);
ImageCodecInfo icf = GdiPlusFileType.GetImageCodecInfo(ImageFormat.Bmp);
EncoderParameters parms = new EncoderParameters(1);
EncoderParameter parm = new EncoderParameter(Encoder.ColorDepth, 24);
parms.Param[0] = parm;
using (Bitmap bitmap = CreateAliased24BppBitmap(scratchSurface))
{
GdiPlusFileType.LoadProperties(bitmap, input);
bitmap.Save(output, icf, parms);
}
}
else if (bitDepth == SavableBitDepths.Rgb8)
{
using (Bitmap quantized = Quantize(scratchSurface, ditherLevel, 256, false, progressCallback))
{
ImageCodecInfo icf = GdiPlusFileType.GetImageCodecInfo(ImageFormat.Bmp);
EncoderParameters parms = new EncoderParameters(1);
EncoderParameter parm = new EncoderParameter(Encoder.ColorDepth, 8);
parms.Param[0] = parm;
GdiPlusFileType.LoadProperties(quantized, input);
quantized.Save(output, icf, parms);
}
}
else
{
throw new InvalidEnumArgumentException("bitDepth", (int)bitDepth, typeof(SavableBitDepths));
}
}
protected override void OnSaveT(Document input, Stream output, PropertyBasedSaveConfigToken token, Surface scratchSurface, ProgressEventHandler progressCallback)
{
int quality = token.GetProperty <Int32Property>(PropertyNames.Quality).Value;
ImageCodecInfo icf = GdiPlusFileType.GetImageCodecInfo(ImageFormat.Jpeg);
EncoderParameters parms = new EncoderParameters(1);
EncoderParameter parm = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);
parms.Param[0] = parm;
scratchSurface.Clear(ColorBgra.White);
using (RenderArgs ra = new RenderArgs(scratchSurface))
{
input.Render(ra, false);
}
using (Bitmap bitmap = scratchSurface.CreateAliasedBitmap())
{
GdiPlusFileType.LoadProperties(bitmap, input);
bitmap.Save(output, icf, parms);
}
}
internal override int GetDitherLevelFromToken(PropertyBasedSaveConfigToken token)
{
int ditherLevel = token.GetProperty <Int32Property>(PropertyNames.DitherLevel).Value;
return(ditherLevel);
}
internal override int GetThresholdFromToken(PropertyBasedSaveConfigToken token)
{
int threshold = token.GetProperty <Int32Property>(PropertyNames.Threshold).Value;
return(threshold);
}
internal override int GetThresholdFromToken(PropertyBasedSaveConfigToken token)
{
return(0);
}
private PropertyBasedSaveConfigToken(PropertyBasedSaveConfigToken copyMe)
: base(copyMe)
{
this.properties = copyMe.properties.Clone();
}
protected unsafe override sealed void OnSaveT(
Document input,
Stream output,
PropertyBasedSaveConfigToken token,
Surface scratchSurface,
ProgressEventHandler progressCallback)
{
// flatten the document -- render w/ transparent background
scratchSurface.Clear(ColorBgra.Transparent);
using (RenderArgs ra = new RenderArgs(scratchSurface))
{
input.Render(ra, false);
}
// load properties from token
int thresholdFromToken = GetThresholdFromToken(token);
int ditherLevel = GetDitherLevelFromToken(token);
Set <SavableBitDepths> allowedBitDepths = CreateAllowedBitDepthListFromToken(token);
if (allowedBitDepths.Count == 0)
{
throw new ArgumentException("there must be at least 1 element returned from CreateAllowedBitDepthListFromToken()");
}
// allowedBitDepths.Count >= 1
// set to 1 unless allowedBitDepths contains only Rgb8 and Rgba8
int threshold;
if (allowedBitDepths.IsSubsetOf(Set.Create(SavableBitDepths.Rgb8, SavableBitDepths.Rgba8)))
{
threshold = thresholdFromToken;
}
else
{
threshold = 1;
}
// Analyze image, try to detect what bit-depth or whatever to use, based on allowedBitDepths
bool allOpaque;
bool all0or255Alpha;
int uniqueColorCount;
Analyze(scratchSurface, out allOpaque, out all0or255Alpha, out uniqueColorCount);
Set <SavableBitDepths> losslessBitDepths = new Set <SavableBitDepths>();
losslessBitDepths.Add(SavableBitDepths.Rgba32);
if (allOpaque)
{
losslessBitDepths.Add(SavableBitDepths.Rgb24);
if (uniqueColorCount <= 256)
{
losslessBitDepths.Add(SavableBitDepths.Rgb8);
}
}
else if (all0or255Alpha && uniqueColorCount < 256)
{
losslessBitDepths.Add(SavableBitDepths.Rgba8);
}
SavableBitDepths bitDepth = ChooseBitDepth(allowedBitDepths, losslessBitDepths, allOpaque, all0or255Alpha, uniqueColorCount);
if (bitDepth == SavableBitDepths.Rgba8 && threshold == 0 && allowedBitDepths.Contains(SavableBitDepths.Rgba8) && allowedBitDepths.Contains(SavableBitDepths.Rgb8))
{
// threshold of 0 should effectively force full 256 color palette, instead of 255+1 transparent
bitDepth = SavableBitDepths.Rgb8;
}
// if bit depth is 24 or 8, then we have to do away with the alpha channel
// for 8-bit, we must have pixels that have either 0 or 255 alpha
if (bitDepth == SavableBitDepths.Rgb8 ||
bitDepth == SavableBitDepths.Rgba8 ||
bitDepth == SavableBitDepths.Rgb24)
{
UserBlendOps.NormalBlendOp blendOp = new UserBlendOps.NormalBlendOp();
for (int y = 0; y < scratchSurface.Height; ++y)
{
for (int x = 0; x < scratchSurface.Width; ++x)
{
ColorBgra p = scratchSurface[x, y];
if (p.A < threshold && bitDepth == SavableBitDepths.Rgba8)
{
p = ColorBgra.FromBgra(0, 0, 0, 0);
}
else
{
p = blendOp.Apply(ColorBgra.White, p);
}
scratchSurface[x, y] = p;
}
}
}
Tracing.Ping("Chose " + bitDepth + ", ditherLevel=" + ditherLevel + ", threshold=" + threshold);
// finally, do the save.
FinalSave(input, output, scratchSurface, ditherLevel, bitDepth, token, progressCallback);
}
internal abstract int GetDitherLevelFromToken(PropertyBasedSaveConfigToken token);
internal abstract int GetThresholdFromToken(PropertyBasedSaveConfigToken token);
internal abstract Set <SavableBitDepths> CreateAllowedBitDepthListFromToken(PropertyBasedSaveConfigToken token);
