QrRaster.h

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#pragma once
 
#include <cstddef>
#include <cstdint>
 
namespace cdc::ui::qr {

inline constexpr uint16_t QR_MAX_SIDE_PX = 1024;

inline void packModule(uint8_t* out, uint16_t stride, uint8_t scale, uint8_t quiet,
                       int mx, int my)
{
    const int px0 = (quiet + mx) * scale;
    const int py0 = (quiet + my) * scale;
    for (int dy = 0; dy < scale; dy++) {
        uint8_t* row = out + static_cast<size_t>(py0 + dy) * stride;
        for (int dx = 0; dx < scale; dx++) {
            const int px = px0 + dx;
            row[px >> 3] |= static_cast<uint8_t>(0x80u >> (px & 7));
        }
    }
}

int measure(const char* data, uint8_t max_version, uint8_t ecc, uint16_t* out_modules);

int render(const char* data, uint8_t max_version, uint8_t ecc,
           uint8_t scale, uint8_t quiet_modules,
           uint8_t* out, size_t out_size,
           uint16_t* out_stride_bytes, uint16_t* out_height_px);
 
}  // namespace cdc::ui::qr