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Nametags rewrite (Canvas edition) #102

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Nametags rewrite (Canvas edition) #102

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00efd88
Feature/nametags v2 (#1)
Armored-Dragon Mar 5, 2025
9712718
Increase radius.
Armored-Dragon Mar 5, 2025
83b8b83
Fix duplicate tags being created.
Armored-Dragon Mar 5, 2025
865a023
Color variables in canvas.
Armored-Dragon Mar 5, 2025
3e52bb1
Minor cleanup.
Armored-Dragon Mar 5, 2025
88606ee
Hide first row of pixels in name tag.
Armored-Dragon Mar 5, 2025
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10 changes: 10 additions & 0 deletions applications/nametags/canvas.html
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Original file line number Diff line number Diff line change
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<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<canvas class="canvas"></canvas>
</body>
<script src="./canvas.js"></script>
</html>
134 changes: 134 additions & 0 deletions applications/nametags/canvas.js
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const canvas = document.querySelector('canvas');

const colors = {
transparentBlack: "#111111ee",
black: "black",
white: "white",
overte: "#6667ab"
}

const fonts = {
nameplate: "256px Arial",
}

function drawNamePlate(name = "", userUUID = "", hasGroup = false, groupBannerURL = "", tagWidth = 3000, groupBannerHeight = 600, nameTagHeight = 500) {
let ctx = canvas.getContext("2d");

// Set the canvas size to match tagWidth and a suitable height
canvas.width = tagWidth;
canvas.height = groupBannerHeight + nameTagHeight;

if (hasGroup) {
const backgroundImage = new Image();
backgroundImage.setAttribute('crossorigin', 'anonymous');
backgroundImage.src = groupBannerURL;

backgroundImage.onload = function () {
// Calculate the scale factor to maximize one dimension within the available space
const scaleFactorX = groupBannerHeight / backgroundImage.height;
const scaleFactorY = tagWidth / backgroundImage.width;
const scaleFactor = Math.max(scaleFactorX, scaleFactorY);

// Calculate new dimensions for the image while maintaining aspect ratio
const newWidth = backgroundImage.width * scaleFactor;
const newHeight = backgroundImage.height * scaleFactor;

// Calculate the vertical offset to center the image vertically within the banner area
const yPosition = (groupBannerHeight - newHeight) / 2;

// Save the current state of the canvas
ctx.save();

// Set up clipping path for the top part of the canvas
ctx.beginPath();
ctx.rect(0, 0, tagWidth, groupBannerHeight);
ctx.clip();

// Draw the image starting from (0, yPosition)
ctx.drawImage(backgroundImage, 0, yPosition, newWidth, newHeight);

// Restore the previous state of the canvas
ctx.restore();

EventBridge.emitWebEvent(JSON.stringify({
action: "nameplateReady",
data: {
imageBase64: getImageBase64(),
userUUID: userUUID
}
}));
};
}

// Nametag background with inset border
const radius = 160; // Define the radius of the rounded corners

// Main fill color
ctx.fillStyle = colors.transparentBlack;
ctx.strokeStyle = colors.black;
drawRoundedRectangle(ctx, 0, groupBannerHeight, tagWidth, nameTagHeight, radius);
ctx.fill();

// Inset border color
ctx.strokeStyle = colors.overte;
ctx.lineWidth = 20;
drawRoundedRectangle(ctx, 20, groupBannerHeight + 20, tagWidth - 40, nameTagHeight - 40, radius - 10);
ctx.stroke();

// Name text
ctx.font = fonts.nameplate;
ctx.fillStyle = colors.white;
ctx.strokeStyle = colors.black;

const nameTag = name;
const nameTagTextWidth = ctx.measureText(nameTag).width; // Measure the width of the text
const nameTagXPosition = (tagWidth / 2) - (nameTagTextWidth / 2); // Calculate the center position

ctx.shadowColor = colors.black;
ctx.shadowBlur = 10;
ctx.lineWidth = 8;

ctx.strokeText(nameTag, nameTagXPosition - 4, groupBannerHeight + 4 + (nameTagHeight + 150) / 2);
ctx.fillText(nameTag, nameTagXPosition, groupBannerHeight + (nameTagHeight + 150) / 2); // Draw the text at the calculated position

if (!hasGroup) {
EventBridge.emitWebEvent(JSON.stringify({
action: "nameplateReady",
data: {
imageBase64: getImageBase64(),
userUUID: userUUID
}
}));
}
}

function drawRoundedRectangle(ctx, x, y, width, height, radius) {
ctx.beginPath();
ctx.moveTo(x + radius, y);
ctx.lineTo(x + width - radius, y);
ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
ctx.lineTo(x + width, y + height - radius);
ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
ctx.lineTo(x + radius, y + height);
ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
ctx.lineTo(x, y + radius);
ctx.quadraticCurveTo(x, y, x + radius, y);
ctx.closePath();
}

function getImageBase64() {
return canvas.toDataURL('image/png');
}

EventBridge.scriptEventReceived.connect(function (event) {
let eventPacket = {};
try {
eventPacket = JSON.parse(event);
} catch {
return;
}

if (eventPacket.action === 'generateNameplate') {
drawNamePlate(eventPacket.data.name, eventPacket.data.userUUID, eventPacket.data.hasGroup, eventPacket.data.groupBannerURL);
}
})
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