public static void DoBitmapEntry(ByteReader reader, ParseContext context, IcoFrame source)
{
var biSize = reader.NextUint32();
var biWidth = reader.NextInt32();
var biHeight = reader.NextInt32();
var biPlanes = reader.NextUint16();
var biBitCount = reader.NextUint16();
var biCompression = reader.NextUint32();
var biSizeImage = reader.NextUint32();
var biXPelsPerMeter = reader.NextInt32();
var biYPelsPerMeter = reader.NextInt32();
var biClrUsed = reader.NextUint32();
var biClrImportant = reader.NextUint32();
if (biSize != FileFormatConstants._bitmapInfoHeaderSize)
{
throw new InvalidIcoFileException(IcoErrorCode.InvalidBitapInfoHeader_ciSize, $"BITMAPINFOHEADER.ciSize should be {FileFormatConstants._bitmapInfoHeaderSize}, was {biSize}.", context);
}
if (biXPelsPerMeter != 0)
{
context.Reporter.WarnLine(IcoErrorCode.InvalidBitapInfoHeader_biXPelsPerMeter, $"BITMAPINFOHEADER.biXPelsPerMeter should be 0, was {biXPelsPerMeter}.", context.DisplayedPath, context.ImageDirectoryIndex.Value);
}
if (biYPelsPerMeter != 0)
{
context.Reporter.WarnLine(IcoErrorCode.InvalidBitapInfoHeader_biYPelsPerMeter, $"BITMAPINFOHEADER.biYPelsPerMeter should be 0, was {biYPelsPerMeter}.", context.DisplayedPath, context.ImageDirectoryIndex.Value);
}
if (biCompression == FileFormatConstants.BI_BITFIELDS)
{
throw new InvalidIcoFileException(IcoErrorCode.BitfieldCompressionNotSupported, $"This tool does not implement icon bitmaps that use BI_BITFIELDS compression. (The .ICO file may be okay, although it is certainly unusual.)", context);
}
if (biCompression != FileFormatConstants.BI_RGB)
{
throw new InvalidIcoFileException(IcoErrorCode.BitmapCompressionNotSupported, $"BITMAPINFOHEADER.biCompression is unknown value ({biCompression}).", context);
}
if (biHeight != source.Encoding.ClaimedHeight * 2)
{
context.Reporter.WarnLine(IcoErrorCode.MismatchedHeight, $"BITMAPINFOHEADER.biHeight is not exactly double ICONDIRECTORY.bHeight ({biHeight} != 2 * {source.Encoding.ClaimedHeight}).", context.DisplayedPath, context.ImageDirectoryIndex.Value);
}
if (biWidth != source.Encoding.ClaimedWidth)
{
context.Reporter.WarnLine(IcoErrorCode.MismatchedWidth, $"BITMAPINFOHEADER.biWidth is not exactly equal to ICONDIRECTORY.bWidth ({biWidth} != 2 * {source.Encoding.ClaimedWidth}).", context.DisplayedPath, context.ImageDirectoryIndex.Value);
}
var height = biHeight / 2;
var width = biWidth;
source.Encoding.ActualHeight = (uint)height;
source.Encoding.ActualWidth = (uint)width;
source.Encoding.ActualBitDepth = biBitCount;
source.Encoding.Type = IcoEncodingType.Bitmap;
source.CookedData = new Image <Rgba32>(width, height);
switch (biBitCount)
{
case 1:
case 2:
case 4:
case 8:
ReadIndexedBitmap(reader, context, biBitCount, biClrUsed, height, width, source);
break;
case 16:
ReadBitmap16(reader, context, height, width, source);
break;
case 24:
ReadBitmap24(reader, context, biClrUsed, height, width, source);
break;
case 32:
ReadBitmap32(reader, context, height, width, source);
break;
default:
throw new InvalidIcoFileException(IcoErrorCode.InvalidBitapInfoHeader_biBitCount, $"BITMAPINFOHEADER.biBitCount is unknown value ({biBitCount}); expected 1, 4, 8, 16, or 32 bit depth.", context);
}
}
