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Change MaskPattern.Patterns to a list #531

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merged 4 commits into from
May 22, 2024

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Shane32
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@Shane32 Shane32 commented May 19, 2024

This code changes MaskPattern.Patterns to a list instead of a dictionary to hopefully make some code easier to understand.

Existing code

The index is stored zero-based within the QR code, and I was confused by this code here:

var formatStr = GetFormatString(eccLevel, pattern.Key - 1);

followed by

selectedPattern = pattern.Key;

and

qrCode.ModuleMatrix[y][x] ^= MaskPattern.Patterns[selectedPattern.Value](x, y);
qrCode.ModuleMatrix[x][y] ^= MaskPattern.Patterns[selectedPattern.Value](y, x);

which is actually correct because of

return selectedPattern.Value - 1;

So since the dictionary is unnecessary, I converted it to a list. It should be faster too but I didn't check.

New code

Now we start with this:

for (var maskPattern = 0; maskPattern < 8; maskPattern )
{
var patternFunc = MaskPattern.Patterns[maskPattern];

and uses are simple:

var formatStr = GetFormatString(eccLevel, maskPattern);

selectedPattern = maskPattern;

return selectedPattern.Value;

@Shane32
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Shane32 commented May 22, 2024

I'll need to fix conflicts here

QRCoder/QRCodeGenerator.ModulePlacer.cs Outdated Show resolved Hide resolved
QRCoder/QRCodeGenerator.ModulePlacer.cs Outdated Show resolved Hide resolved
@codebude
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Can you also have a look on the merge conflicts?
image

@Shane32 Shane32 requested a review from codebude May 22, 2024 20:37
@codebude codebude merged commit e3664d1 into codebude:master May 22, 2024
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@Shane32 Shane32 deleted the maskpattern_list branch May 22, 2024 22:27
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2 participants