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Copy pathBitmapHelper.cs
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Copy pathBitmapHelper.cs
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307 lines (299 loc) · 7.37 KB
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using System;
namespace SL3Reader;
public static class BitmapHelper
{
public const int BitmapCombinedHeaderSize =
BitmapFileHeader.Size +
BitmapInfoHeader.Size +
256 * Bgra.Size; // 1078.
private static readonly byte[] imageFileHeader =
[
0,0,0,0,0,0,0,0,0,0,
0,0,0,0, /* BitmapFileHeader part, */
0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0, /* BitmapInfoHeader part, */
27,27,27,0, /* 1st color in Palette*/
37,37,47,0,
39,39,53,0,
37,38,57,0,
36,38,58,0,
35,36,59,0,
36,37,59,0,
34,35,60,0,
35,36,60,0,
38,39,60,0,
32,34,61,0,
33,35,61,0,
31,32,62,0,
32,33,62,0,
38,39,62,0,
30,31,63,0,
31,32,63,0,
38,39,63,0,
29,30,64,0,
29,31,64,0,
30,31,64,0,
28,29,65,0,
28,30,65,0,
38,39,65,0,
28,30,66,0,
28,30,67,0,
38,39,68,0,
39,40,68,0,
29,31,69,0,
38,39,69,0,
29,32,70,0,
29,32,71,0,
30,33,72,0,
30,33,74,0,
30,34,75,0,
31,35,76,0,
31,35,77,0,
31,36,79,0,
31,37,80,0,
32,37,81,0,
32,38,82,0,
32,38,84,0,
32,39,85,0,
33,40,86,0,
33,40,87,0,
33,41,89,0,
33,42,90,0,
34,42,91,0,
34,43,92,0,
34,44,94,0,
34,44,95,0,
34,45,96,0,
34,46,97,0,
35,47,99,0,
35,47,100,0,
35,48,101,0,
35,49,102,0,
35,49,104,0,
35,50,105,0,
35,51,106,0,
36,52,107,0,
36,53,109,0,
36,53,110,0,
36,54,111,0,
36,55,112,0,
36,56,114,0,
36,56,115,0,
36,57,116,0,
36,58,117,0,
36,59,119,0,
36,60,120,0,
36,61,121,0,
36,61,122,0,
36,62,124,0,
36,63,125,0,
36,64,126,0,
36,65,127,0,
36,66,129,0,
36,67,130,0,
36,68,131,0,
36,68,132,0,
36,69,134,0,
36,70,135,0,
36,71,136,0,
36,72,137,0,
36,73,139,0,
36,74,140,0,
36,75,141,0,
36,76,142,0,
36,77,144,0,
36,78,145,0,
36,80,147,0,
35,81,149,0,
35,83,151,0,
35,85,152,0,
35,87,155,0,
35,88,156,0,
34,90,159,0,
34,91,160,0,
34,94,163,0,
33,95,164,0,
33,97,166,0,
33,98,168,0,
33,100,169,0,
32,101,170,0,
32,102,171,0,
32,103,173,0,
32,105,174,0,
31,106,175,0,
31,107,176,0,
31,109,178,0,
30,110,179,0,
30,111,180,0,
30,113,181,0,
30,114,183,0,
29,115,184,0,
29,117,185,0,
29,118,186,0,
28,120,188,0,
28,121,189,0,
28,123,190,0,
27,126,193,0,
26,127,194,0,
26,130,196,0,
25,132,198,0,
24,135,200,0,
24,137,201,0,
24,138,203,0,
23,140,204,0,
23,141,205,0,
22,143,206,0,
22,145,208,0,
21,146,209,0,
21,148,210,0,
20,150,211,0,
20,152,213,0,
20,153,214,0,
19,157,216,0,
18,159,218,0,
17,163,220,0,
16,164,221,0,
15,168,224,0,
15,170,225,0,
14,172,226,0,
15,173,227,0,
16,173,227,0,
17,173,227,0,
17,173,228,0,
18,174,228,0,
19,174,228,0,
20,174,228,0,
20,174,229,0,
21,175,229,0,
22,175,229,0,
23,175,229,0,
24,176,230,0,
25,176,230,0,
26,176,230,0,
27,176,231,0,
27,177,231,0,
28,177,231,0,
29,177,231,0,
29,177,232,0,
30,178,232,0,
31,178,232,0,
32,178,232,0,
32,178,233,0,
33,179,233,0,
34,179,233,0,
36,180,234,0,
38,180,234,0,
38,181,234,0,
39,181,235,0,
40,181,235,0,
41,181,235,0,
42,182,235,0,
42,182,236,0,
43,182,236,0,
44,182,236,0,
44,183,236,0,
45,183,237,0,
46,183,237,0,
48,184,237,0,
48,184,238,0,
50,185,238,0,
51,185,238,0,
52,185,239,0,
52,186,239,0,
53,186,239,0,
54,186,239,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0,
56,187,240,0 /* End Palette */
];
public static byte[] CreateBuffer(int maxHeight, int maxWidth)
{
// (maxHeight * (maxWidth + (4 - maxWidth % 4))));
byte[] buffer = GC.AllocateUninitializedArray<byte>(
BitmapCombinedHeaderSize +
maxHeight * maxWidth, true); // Pinned to prevent re-pining
Buffer.BlockCopy(imageFileHeader, 0, buffer, 0, BitmapCombinedHeaderSize);
return buffer;
}
public static unsafe void UpdateBuffer(byte[] buffer,
int height, int width,
out int fullStride,
out Span<byte> fileBuffer,
out Span<byte> pixelData)
{
fullStride = width; //width + (4 - (width % 4));
fixed (byte* pBuffer = buffer) // Just formal: buffer is pre-pinned by the GC.
{
BitmapFileHeader* pFileHeader = (BitmapFileHeader*)pBuffer;
int fileSize = (int)pFileHeader->Update(width, height);
((BitmapInfoHeader*)(pBuffer + BitmapFileHeader.Size))->Update(width, height);
fileBuffer = new Span<byte>(pBuffer, fileSize);
pixelData = fileBuffer[BitmapCombinedHeaderSize..];
}
}
}