feat: qr code canister
This commit is contained in:
Ahmet Kaan GÜMÜŞ
parent
717e1742e6
commit
9ca65d43f6
10 changed files with 1075 additions and 0 deletions
25
.gitignore
vendored
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25
.gitignore
vendored
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@ -0,0 +1,25 @@
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# Various IDEs and Editors
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.vscode/
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.idea/
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**/*~
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# Mac OSX temporary files
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.DS_Store
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**/.DS_Store
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# dfx temporary files
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.dfx/
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# generated files
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**/declarations/
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# rust
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target/
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# frontend code
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node_modules/
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dist/
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.svelte-kit/
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# environment variables
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.env
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828
Cargo.lock
generated
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828
Cargo.lock
generated
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@ -0,0 +1,828 @@
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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||||
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||||
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||||
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|
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|
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|
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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|
||||
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||||
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||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||
|
||||
[[package]]
|
||||
name = "winapi-x86_64-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
5
Cargo.toml
Normal file
5
Cargo.toml
Normal file
|
|
@ -0,0 +1,5 @@
|
|||
[workspace]
|
||||
members = [
|
||||
"src/qr_backend"
|
||||
]
|
||||
resolver = "2"
|
||||
17
dfx.json
Normal file
17
dfx.json
Normal file
|
|
@ -0,0 +1,17 @@
|
|||
{
|
||||
"canisters": {
|
||||
"qr_backend": {
|
||||
"candid": "src/qr_backend/qr_backend.did",
|
||||
"package": "qr_backend",
|
||||
"type": "rust"
|
||||
}
|
||||
},
|
||||
"defaults": {
|
||||
"build": {
|
||||
"args": "",
|
||||
"packtool": ""
|
||||
}
|
||||
},
|
||||
"output_env_file": ".env",
|
||||
"version": 1
|
||||
}
|
||||
19
src/qr_backend/Cargo.toml
Normal file
19
src/qr_backend/Cargo.toml
Normal file
|
|
@ -0,0 +1,19 @@
|
|||
[package]
|
||||
name = "qr_backend"
|
||||
version = "0.1.0"
|
||||
edition = "2021"
|
||||
|
||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||
|
||||
[lib]
|
||||
crate-type = ["cdylib"]
|
||||
|
||||
[dependencies]
|
||||
anyhow = "1.0.79"
|
||||
candid = "0.10"
|
||||
colorgrad = "0.6.2"
|
||||
ic-cdk = "0.12"
|
||||
ic-cdk-timers = "0.6" # Feel free to remove this dependency if you don't need timers
|
||||
image = { version = "0.24.8", features = ["png"], default-features = false }
|
||||
qrcode-generator = "4.1.9"
|
||||
serde = { version = "1.0.196", features = ["derive"] }
|
||||
22
src/qr_backend/qr_backend.did
Normal file
22
src/qr_backend/qr_backend.did
Normal file
|
|
@ -0,0 +1,22 @@
|
|||
type Options = record
|
||||
{
|
||||
add_logo: bool;
|
||||
add_gradient: bool;
|
||||
add_transparency: opt bool;
|
||||
};
|
||||
|
||||
type QRError = record
|
||||
{
|
||||
message: text;
|
||||
};
|
||||
|
||||
type QRResult = variant
|
||||
{
|
||||
Image: blob;
|
||||
Err: QRError;
|
||||
}
|
||||
service :
|
||||
{
|
||||
"qrcode_query": (input: text, options: Options) -> (QRResult) query;
|
||||
"qrcode_update": (input: text, options: Options) -> (QRResult);
|
||||
}
|
||||
BIN
src/qr_backend/src/assets/logo_transparent.png
Normal file
BIN
src/qr_backend/src/assets/logo_transparent.png
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 26 KiB |
BIN
src/qr_backend/src/assets/logo_white.png
Normal file
BIN
src/qr_backend/src/assets/logo_white.png
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 22 KiB |
95
src/qr_backend/src/core.rs
Normal file
95
src/qr_backend/src/core.rs
Normal file
|
|
@ -0,0 +1,95 @@
|
|||
use image::{imageops, ImageBuffer, Rgba};
|
||||
use qrcode_generator::QrCodeEcc;
|
||||
use std::io::Cursor;
|
||||
|
||||
use crate::Options;
|
||||
|
||||
pub(super) fn generate(input: String, options: Options, logo: &[u8], image_size: usize) -> Result<Vec<u8>, anyhow::Error>
|
||||
{
|
||||
let mut qr = image::DynamicImage::ImageLuma8(qrcode_generator::to_image_buffer(input, QrCodeEcc::Quartile, image_size,)?).into_rgba8();
|
||||
|
||||
if options.add_transparency == Some(true)
|
||||
{
|
||||
make_transparent(&mut qr);
|
||||
}
|
||||
if options.add_logo
|
||||
{
|
||||
add_logo(&mut qr, logo);
|
||||
}
|
||||
if options.add_gradient
|
||||
{
|
||||
add_gradient(&mut qr);
|
||||
}
|
||||
|
||||
let mut result = vec![];
|
||||
qr.write_to(&mut Cursor::new(&mut result), image::ImageOutputFormat::Png)?;
|
||||
Ok(result)
|
||||
}
|
||||
|
||||
fn make_transparent(qr: &mut ImageBuffer<Rgba<u8>, Vec<u8>>)
|
||||
{
|
||||
for (_x, _y, pixel) in qr.enumerate_pixels_mut()
|
||||
{
|
||||
if pixel.0 == [255, 255, 255, 255]
|
||||
{
|
||||
*pixel = image::Rgba([255, 255, 255, 0]);
|
||||
}
|
||||
}
|
||||
}
|
||||
fn add_logo(qr: &mut ImageBuffer<Rgba<u8>, Vec<u8>>, logo: &[u8])
|
||||
{
|
||||
let image_size = qr.width().min(qr.height()) as usize;
|
||||
let element_size = get_qr_element_size(qr);
|
||||
|
||||
let mut logo_size = element_size;
|
||||
|
||||
while logo_size +2 * element_size <= 5 * image_size /16
|
||||
{
|
||||
logo_size += 2*element_size;
|
||||
}
|
||||
|
||||
let mut logo = image::io::Reader::new(Cursor::new(logo)).with_guessed_format().unwrap().decode().unwrap();
|
||||
|
||||
logo = logo.resize(logo_size as u32, logo_size as u32, imageops::FilterType::Lanczos3);
|
||||
|
||||
imageops::replace(qr, &logo, ((image_size-logo_size)/2) as i64, ((image_size-logo_size)/2) as i64);
|
||||
}
|
||||
fn add_gradient(qr: &mut ImageBuffer<Rgba<u8>, Vec<u8>>)
|
||||
{
|
||||
let image_size = qr.width().min(qr.height()) as usize;
|
||||
let gradient = colorgrad::CustomGradient::new().colors(&[colorgrad::Color::from_rgba8(100, 0, 100, 255), colorgrad::Color::from_rgba8(30, 5, 60, 225)]).build().unwrap();
|
||||
let center = (image_size / 2) as u32;
|
||||
for (x, y, pixel) in qr.enumerate_pixels_mut()
|
||||
{
|
||||
if pixel.0 == [0, 0, 0, 255]
|
||||
{
|
||||
let distance = x.abs_diff(center) + y.abs_diff(center);
|
||||
let rgba = gradient.at(distance as f64 / image_size as f64).to_rgba8();
|
||||
*pixel = image::Rgba(rgba);
|
||||
}
|
||||
}
|
||||
}
|
||||
fn get_qr_element_size(qr: &mut ImageBuffer<Rgba<u8>, Vec<u8>>) -> usize
|
||||
{
|
||||
const BLACK_PIXEL: [u8;4] = [0, 0, 0, 255];
|
||||
let size = qr.width().min(qr.height());
|
||||
let mut start = size;
|
||||
for i in 0..size
|
||||
{
|
||||
if qr.get_pixel(i, i).0 == BLACK_PIXEL
|
||||
{
|
||||
start = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
let mut element_size = 1;
|
||||
for i in 0..size-start
|
||||
{
|
||||
if qr.get_pixel(start+i, start+i).0 != BLACK_PIXEL
|
||||
{
|
||||
element_size = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
element_size as usize
|
||||
}
|
||||
64
src/qr_backend/src/lib.rs
Normal file
64
src/qr_backend/src/lib.rs
Normal file
|
|
@ -0,0 +1,64 @@
|
|||
use candid::{CandidType, Deserialize};
|
||||
use std::include_bytes;
|
||||
mod core;
|
||||
|
||||
const IMAGE_SIZE_IN_PIXEL: usize = 1024;
|
||||
const LOGO_TRANSPARENT: &[u8] = include_bytes!("./assets/logo_transparent.png");
|
||||
const LOGO_WHITE: &[u8] = include_bytes!("./assets/logo_white.png");
|
||||
#[ic_cdk::query]
|
||||
fn greet(name: String) -> String {
|
||||
format!("Hello, {}!", name)
|
||||
}
|
||||
|
||||
|
||||
#[derive(CandidType, Deserialize)]
|
||||
struct Options
|
||||
{
|
||||
add_logo:bool,
|
||||
add_gradient:bool,
|
||||
add_transparency: Option<bool>,
|
||||
}
|
||||
|
||||
#[derive(CandidType, Deserialize)]
|
||||
struct QRError
|
||||
{
|
||||
message: String,
|
||||
}
|
||||
|
||||
#[derive(CandidType, Deserialize)]
|
||||
enum QRResult
|
||||
{
|
||||
Image(Vec<u8>),
|
||||
Err(QRError),
|
||||
}
|
||||
|
||||
fn qrcode(input: String, options: Options) -> QRResult
|
||||
{
|
||||
let logo = if options.add_transparency == Some(true)
|
||||
{
|
||||
LOGO_TRANSPARENT
|
||||
}
|
||||
else
|
||||
{
|
||||
LOGO_WHITE
|
||||
};
|
||||
let result = match core::generate(input, options, logo, IMAGE_SIZE_IN_PIXEL)
|
||||
{
|
||||
Ok(blob) => QRResult::Image(blob),
|
||||
Err(err) => QRResult::Err(QRError{message: err.to_string()}),
|
||||
};
|
||||
ic_cdk::println!("Executed Instructions: {}", ic_cdk::api::performance_counter(0));
|
||||
result
|
||||
}
|
||||
|
||||
#[ic_cdk::update]
|
||||
fn qrcode_update(input: String, options: Options) -> QRResult
|
||||
{
|
||||
qrcode(input, options)
|
||||
}
|
||||
|
||||
#[ic_cdk::query]
|
||||
fn qrcode_query(input: String, options: Options) -> QRResult
|
||||
{
|
||||
qrcode(input, options)
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue