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add full color space details and transformation into full bytes for indexed

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This commit is contained in:
Eliot Jones
2021-02-06 11:31:23 -04:00
parent c008340b2b
commit fad06eac27
10 changed files with 480 additions and 68 deletions
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12
src/UglyToad.PdfPig/Images/Png/PngFromPdfImageFactory.cs
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@@ -9,15 +9,23 @@
{
bytes = null;
var isColorSpaceSupported = image.ColorSpace == ColorSpace.DeviceGray || image.ColorSpace == ColorSpace.DeviceRGB;
var hasValidDetails = image.ColorSpaceDetails != null &&
!(image.ColorSpaceDetails is UnsupportedColorSpaceDetails);
var actualColorSpace = hasValidDetails ? image.ColorSpaceDetails.BaseType : image.ColorSpace;
var isColorSpaceSupported =
actualColorSpace == ColorSpace.DeviceGray || actualColorSpace == ColorSpace.DeviceRGB;
if (!isColorSpaceSupported || !image.TryGetBytes(out var bytesPure))
{
return false;
}
bytesPure = ColorSpaceDetailsByteConverter.Convert(image.ColorSpaceDetails, bytesPure);
try
{
var is3Byte = image.ColorSpace == ColorSpace.DeviceRGB;
var is3Byte = actualColorSpace == ColorSpace.DeviceRGB;
var multiplier = is3Byte ? 3 : 1;
var builder = PngBuilder.Create(image.WidthInSamples, image.HeightInSamples, false);