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1 files changed, 15 insertions, 0 deletions
| -rw-r--r-- | src/LEDVideoWall.cpp | 15 |
diff --git a/src/LEDVideoWall.cpp b/src/LEDVideoWall.cpp index e235aa2..5fb69ac 100644 --- a/src/LEDVideoWall.cpp +++ b/src/LEDVideoWall.cpp @@ -14,7 +14,22 @@ LEDVideoWall* LEDVideoWall::Freeform(mm panel_width, mm panel_height, mm wall_ma rows); } +#define CMP_EPSILON 0.0000001 + +// GCD is available in stl from C++17 onwards, but I'm still reimplementing it +unsigned int gcd(unsigned int a, unsigned int b) { + if (a == b) return a; + if (a < b) return gcd(b, a); + return gcd(a - b, b); +} + LEDVideoWall* LEDVideoWall::Aspect(mm panel_width, mm panel_height, unsigned int aspect_width, unsigned int aspect_height) { + // Simplify the fraction (aspect), because we want the smallest screen size + // For example, turn 16:10 into 8:5 + unsigned int aspect_gcd = gcd(aspect_width, aspect_height); + aspect_width /= aspect_gcd; + aspect_height /= aspect_gcd; + return new LEDVideoWall( aspect_width * panel_width, aspect_height * panel_height, |