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qr shader: add ec level and mask type bits

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This commit is contained in:
Crispy 2024-08-16 11:02:26 +02:00
parent f6f7c03c14
commit f3f3f305e8
2 changed files with 19 additions and 12 deletions
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2
Assets/test/QRCode.mat
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@ -61,7 +61,7 @@ Material:
m_Scale: {x: 1, y: 1}
m_Offset: {x: 0, y: 0}
m_Ints:
- _Version: 63
- _Version: 15
m_Floats:
- _BumpScale: 1
- _Cutoff: 0.5

25
Assets/test/QRCode.shader
View file

@ -12,13 +12,16 @@ CGPROGRAM
struct Input{float2 uv_;};
uint _Version;
// #define VERSION 15
#define VERSION _Version
#define WIDTH (21 + (VERSION-1)*4)
#define WIDTH (17 + VERSION * 4)
#define ALIGNERS ((VERSION / 7) + 2)
#define ALIGNER_SPACING ((WIDTH - 8 - 5) / (ALIGNERS-1))
#define ALIGNER_SPACING ((WIDTH - 13) / (ALIGNERS-1))
#define MISALIGNMENT ((WIDTH - 13) % (ALIGNERS-1))
#define EC_LEVEL (3)
#define MASK_TYPE (4)
#define FORMAT_BITS ((EC_LEVEL << 3) | MASK_TYPE)
/*
v = 15
width = 77
@ -29,6 +32,7 @@ CGPROGRAM
#define WHITE 1
#define BLACK 0
#define PINK float4(1, .3, .5, 1)
#define BLUE float4(0, .4, .7, 1)
float4 finder_pattern(uint x, uint y) {
if (x < 6 && x > 0 && y < 6 && y > 0) return !(x < 5 && x > 1 && y < 5 && y > 1);
@ -51,6 +55,9 @@ CGPROGRAM
if (px < 8 && py > WIDTH - 9) return finder_pattern(px, py - WIDTH + 7);
if (px > WIDTH - 9 && py < 8) return finder_pattern(px - WIDTH + 7, py);
// filler pixel
if (px == 8 && py == WIDTH - 8) return 0;
// Timing patterns
if (px == 6) return py & 1;
if (py == 6) return px & 1;
@ -76,20 +83,20 @@ CGPROGRAM
uint ax = x % ALIGNER_SPACING;
uint ay = y % ALIGNER_SPACING;
if (ax < 5 && ay < 5) {
// return PINK;
// return (ax|ay) & 1;
return (ax < 4 && ax > 0 && ay < 4 && ay > 0 && !(ax == 2 && ay == 2));
}
}
// Format bits
if (px == 8 && (py < 9 || py > WIDTH - 9)) return 0.8;
if (py == 8 && (px < 9 || px > WIDTH - 9)) return 0.8;
if (px < 5 && py == 8) return (FORMAT_BITS & (1 << (4 - px))) == 0;
if (px == 8 && py > WIDTH - 6) return (FORMAT_BITS & (1 << py + 5 - WIDTH)) == 0;
if (px == 8 && (py < 9 || py > WIDTH - 9)) return PINK;
if (py == 8 && (px < 9 || px > WIDTH - 9)) return PINK;
uint column = (WIDTH - px - (px > 6))/2;
uint direction_up = column & 1;
return column / 10.;
return lerp(BLUE, PINK, column / (WIDTH/2.));
// return direction_up;
return 0.5;
}