2025-08-27 09:57:55 +02:00

595 lines
16 KiB
JavaScript

let Module = null;
let scale = 1;
let offsetX = 0;
let offsetY = 0;
let isPanning = false;
let lastX = 0;
let lastY = 0;
export function init(moduleInstance) {
Module = moduleInstance;
}
export function assignCanvas(canvas) {
const glModule = Module.GL;
const context = canvas.getContext("webgl2", {
antialias: true,
depth: true,
alpha: false,
stencil: true,
preserveDrawingBuffer: true,
});
const handle = glModule.registerContext(context, { majorVersion: 2 });
glModule.makeContextCurrent(handle);
context.getExtension("WEBGL_debug_renderer_info");
Module._init(canvas.width, canvas.height);
Module._set_render_options(0, 1);
}
export function hexToU32ARGB(hex, opacity = 1) {
const rgb = parseInt(hex.slice(1), 16);
const a = Math.floor(opacity * 0xFF);
const argb = (a << 24) | rgb;
return argb >>> 0;
}
export function getRandomInt(min, max) {
return Math.floor(Math.random() * (max - min)) + min;
}
export function getRandomColor() {
const r = getRandomInt(0, 256).toString(16).padStart(2, '0');
const g = getRandomInt(0, 256).toString(16).padStart(2, '0');
const b = getRandomInt(0, 256).toString(16).padStart(2, '0');
return `#${r}${g}${b}`;
}
export function getRandomFloat(min, max) {
return Math.random() * (max - min) + min;
}
function getU32(id) {
const hex = id.replace(/-/g, "");
const buffer = new Uint32Array(4);
for (let i = 0; i < 4; i++) {
buffer[i] = parseInt(hex.slice(i * 8, (i + 1) * 8), 16);
}
return buffer;
}
function heapU32SetUUID(id, heap, offset) {
const buffer = getU32(id);
heap.set(buffer, offset);
return buffer;
}
function ptr8ToPtr32(ptr8) {
return ptr8 >>> 2;
}
export function allocBytes(size) {
return Module._alloc_bytes(size);
}
export function getHeapU32() {
return Module.HEAPU32;
}
export function clearShapeFills() {
Module._clear_shape_fills();
}
export function addShapeSolidFill(argb) {
const ptr = allocBytes(160);
const heap = getHeapU32();
const dv = new DataView(heap.buffer);
dv.setUint8(ptr, 0x00, true);
dv.setUint32(ptr + 4, argb, true);
Module._add_shape_fill();
}
export function addShapeSolidStrokeFill(argb) {
const ptr = allocBytes(160);
const heap = getHeapU32();
const dv = new DataView(heap.buffer);
dv.setUint8(ptr, 0x00, true);
dv.setUint32(ptr + 4, argb, true);
Module._add_shape_stroke_fill();
}
function serializePathAttrs(svgAttrs) {
return Object.entries(svgAttrs).reduce((acc, [key, value]) => {
return acc + key + '\0' + value + '\0';
}, '');
}
export function draw_star(x, y, width, height) {
const len = 11; // 1 MOVE + 9 LINE + 1 CLOSE
const ptr = allocBytes(len * 28);
const heap = getHeapU32();
const dv = new DataView(heap.buffer);
const cx = x + width / 2;
const cy = y + height / 2;
const outerRadius = Math.min(width, height) / 2;
const innerRadius = outerRadius * 0.4;
const star = [];
for (let i = 0; i < 10; i++) {
const angle = Math.PI / 5 * i - Math.PI / 2;
const r = i % 2 === 0 ? outerRadius : innerRadius;
const px = cx + r * Math.cos(angle);
const py = cy + r * Math.sin(angle);
star.push([px, py]);
}
let offset = 0;
// MOVE to first point
dv.setUint16(ptr + offset + 0, 1, true); // MOVE
dv.setFloat32(ptr + offset + 20, star[0][0], true);
dv.setFloat32(ptr + offset + 24, star[0][1], true);
offset += 28;
// LINE to remaining points
for (let i = 1; i < star.length; i++) {
dv.setUint16(ptr + offset + 0, 2, true); // LINE
dv.setFloat32(ptr + offset + 20, star[i][0], true);
dv.setFloat32(ptr + offset + 24, star[i][1], true);
offset += 28;
}
// CLOSE the path
dv.setUint16(ptr + offset + 0, 4, true); // CLOSE
Module._set_shape_path_content();
const str = serializePathAttrs({
"fill": "none",
"stroke-linecap": "round",
"stroke-linejoin": "round",
});
const size = str.length;
offset = allocBytes(size);
Module.stringToUTF8(str, offset, size);
Module._set_shape_path_attrs(3);
}
export function setShapeChildren(shapeIds) {
const offset = allocBytes(shapeIds.length * 16);
const heap = getHeapU32();
let currentOffset = offset;
for (const id of shapeIds) {
heapU32SetUUID(id, heap, ptr8ToPtr32(currentOffset));
currentOffset += 16;
}
return Module._set_children();
}
export function useShape(id) {
const buffer = getU32(id);
Module._use_shape(...buffer);
}
export function set_parent(id) {
const buffer = getU32(id);
Module._set_parent(...buffer);
}
export function render() {
Module._set_view(1, 0, 0);
Module._render_from_cache();
debouncedRender();
}
function debounce(fn, delay) {
let timeout;
return (...args) => {
clearTimeout(timeout);
timeout = setTimeout(() => fn(...args), delay);
};
}
const debouncedRender = debounce(() => {
Module._render(Date.now());
}, 100);
export function setupInteraction(canvas) {
canvas.addEventListener("wheel", (e) => {
e.preventDefault();
const zoomFactor = e.deltaY < 0 ? 1.1 : 0.9;
scale *= zoomFactor;
const mouseX = e.offsetX;
const mouseY = e.offsetY;
offsetX -= (mouseX - offsetX) * (zoomFactor - 1);
offsetY -= (mouseY - offsetY) * (zoomFactor - 1);
Module._set_view(scale, offsetX, offsetY);
Module._render_from_cache();
debouncedRender();
});
canvas.addEventListener("mousedown", (e) => {
isPanning = true;
lastX = e.offsetX;
lastY = e.offsetY;
});
canvas.addEventListener("mousemove", (e) => {
if (isPanning) {
const dx = e.offsetX - lastX;
const dy = e.offsetY - lastY;
offsetX += dx;
offsetY += dy;
lastX = e.offsetX;
lastY = e.offsetY;
Module._set_view(scale, offsetX, offsetY);
Module._render_from_cache();
debouncedRender();
}
});
canvas.addEventListener("mouseup", () => { isPanning = false; });
canvas.addEventListener("mouseout", () => { isPanning = false; });
}
const TextAlign = {
'left': 0,
'center': 1,
'right': 2,
'justify': 3,
}
function getTextAlign(textAlign) {
if (textAlign in TextAlign) {
return TextAlign[textAlign];
}
return 0;
}
function getTextDirection(textDirection) {
switch (textDirection) {
default:
case 'LTR': return 0;
case 'RTL': return 1;
}
}
function getTextDecoration(textDecoration) {
switch (textDecoration) {
default:
case 'none': return 0;
case 'underline': return 1;
case 'line-through': return 2;
case 'overline': return 3;
}
}
function getTextTransform(textTransform) {
switch (textTransform) {
default:
case 'none': return 0;
case 'uppercase': return 1;
case 'lowercase': return 2;
case 'capitalize': return 3;
}
}
function getFontStyle(fontStyle) {
switch (fontStyle) {
default:
case 'normal':
case 'regular':
return 0;
case 'oblique':
case 'italic':
return 1;
}
}
const PARAGRAPH_ATTR_SIZE = 48;
const LEAF_ATTR_SIZE = 60;
const FILL_SIZE = 160;
function setParagraphData(dview, { numLeaves, textAlign, textDirection, textDecoration, textTransform, lineHeight, letterSpacing }) {
// Set number of leaves
dview.setUint32(0, numLeaves, true);
// Serialize paragraph attributes
dview.setUint8(4, textAlign, true); // text-align: left
dview.setUint8(5, textDirection, true); // text-direction: LTR
dview.setUint8(6, textDecoration, true); // text-decoration: none
dview.setUint8(7, textTransform, true); // text-transform: none
dview.setFloat32(8, lineHeight, true); // line-height
dview.setFloat32(12, letterSpacing, true); // letter-spacing
dview.setUint32(16, 0, true); // typography-ref-file (UUID part 1)
dview.setUint32(20, 0, true); // typography-ref-file (UUID part 2)
dview.setUint32(24, 0, true); // typography-ref-file (UUID part 3)
dview.setUint32(28, 0, true); // typography-ref-file (UUID part 4)
dview.setUint32(32, 0, true); // typography-ref-id (UUID part 1)
dview.setUint32(36, 0, true); // typography-ref-id (UUID part 2)
dview.setUint32(40, 0, true); // typography-ref-id (UUID part 3)
dview.setUint32(44, 0, true); // typography-ref-id (UUID part 4)
}
function setLeafData(dview, leafOffset, {
fontId,
fontStyle,
fontSize,
fontWeight,
letterSpacing,
textSize,
totalFills
}) {
// Serialize leaf attributes
dview.setUint8(leafOffset + 0, fontStyle, true); // font-style: normal
dview.setUint8(leafOffset + 1, 0, true); // text-decoration: none
dview.setUint8(leafOffset + 2, 0, true); // text-transform: none
dview.setUint8(leafOffset + 3, 0, true); // text-direction: ltr
dview.setFloat32(leafOffset + 4, fontSize, true); // font-size
dview.setFloat32(leafOffset + 8, letterSpacing, true); // letter-spacing
dview.setInt32(leafOffset + 12, fontWeight, true); // font-weight: normal
dview.setUint32(leafOffset + 16, fontId[0], true); // font-id (UUID part 1)
dview.setUint32(leafOffset + 20, fontId[1], true); // font-id (UUID part 2)
dview.setUint32(leafOffset + 24, fontId[2], true); // font-id (UUID part 3)
dview.setUint32(leafOffset + 28, fontId[3], true); // font-id (UUID part 4)
dview.setUint32(leafOffset + 32, 0, true); // font-family hash
dview.setUint32(leafOffset + 36, 0, true); // font-variant-id (UUID part 1)
dview.setUint32(leafOffset + 40, 0, true); // font-variant-id (UUID part 2)
dview.setUint32(leafOffset + 44, 0, true); // font-variant-id (UUID part 3)
dview.setUint32(leafOffset + 48, 0, true); // font-variant-id (UUID part 4)
dview.setUint32(leafOffset + 52, textSize, true); // text-length
dview.setUint32(leafOffset + 56, totalFills, true); // total fills count
}
function getFontFrom(fontFamily, fontWeight, fontStyle, fonts) {
const fontList = fonts.get(fontFamily)
if (!fontList) {
return null
}
return fontList.find(fontData => fontData.weight === fontWeight && fontStyle === fontData.style)
}
export function updateTextShape(root, fonts) {
// Calculate fills
const fills = [
{
type: "solid",
color: "#ff00ff",
opacity: 1.0,
},
];
const totalFills = fills.length;
const totalFillsSize = totalFills * FILL_SIZE;
const paragraphs = root.children;
Module._clear_shape_text();
for (const paragraph of paragraphs) {
let totalSize = PARAGRAPH_ATTR_SIZE;
const leaves = paragraph.children;
const numLeaves = leaves.length;
for (const leaf of leaves) {
const text = leaf.textContent;
const textBuffer = new TextEncoder().encode(text);
const textSize = textBuffer.byteLength;
totalSize += LEAF_ATTR_SIZE + totalFillsSize;
}
totalSize += paragraph.textContent.length;
// Allocate buffer
const bufferPtr = allocBytes(totalSize);
const heap = new Uint8Array(Module.HEAPU8.buffer, bufferPtr, totalSize);
const dview = new DataView(heap.buffer, bufferPtr, totalSize);
const textAlign = getTextAlign(
paragraph.style.getPropertyValue("text-align"),
);
const textDirection = getTextDirection(
paragraph.style.getPropertyValue("text-direction"),
);
const textDecoration = getTextDecoration(
paragraph.style.getPropertyValue("text-decoration"),
);
const textTransform = getTextTransform(
paragraph.style.getPropertyValue("text-transform"),
);
const lineHeight = parseFloat(
paragraph.style.getPropertyValue("line-height"),
);
const letterSpacing = parseFloat(
paragraph.style.getPropertyValue("letter-spacing"),
);
setParagraphData(dview, {
numLeaves,
textAlign,
textDecoration,
textTransform,
textDirection,
lineHeight,
letterSpacing
})
let leafOffset = PARAGRAPH_ATTR_SIZE;
for (const leaf of leaves) {
const fontStyle = leaf.style.getPropertyValue("font-style");
const fontStyleSerialized = getFontStyle(fontStyle);
const fontSize = parseFloat(leaf.style.getPropertyValue("font-size"));
const letterSpacing = parseFloat(leaf.style.getPropertyValue("letter-spacing"))
const fontWeight = parseInt(
leaf.style.getPropertyValue("font-weight"),
10,
);
const text = leaf.textContent;
const textBuffer = new TextEncoder().encode(text);
const textSize = textBuffer.byteLength;
const fontFamily = leaf.style.getPropertyValue('font-family');
const fontData = getFontFrom(fontFamily, fontWeight, fontStyle, fonts)
const defaultFontId = new Uint32Array([0, 0, 0, 0])
const fontId = fontData ? getU32(fontData.id) : defaultFontId
setLeafData(dview, leafOffset, {
fontId,
fontStyle: fontStyleSerialized,
textDecoration: 0,
textTransform: 0,
textDirection: 0,
fontSize,
fontWeight,
letterSpacing,
textSize,
totalFills,
});
// Serialize fills
let fillOffset = leafOffset + LEAF_ATTR_SIZE;
fills.forEach((fill) => {
if (fill.type === "solid") {
const argb = hexToU32ARGB(fill.color, fill.opacity);
dview.setUint8(fillOffset + 0, 0x00, true); // Fill type: solid
dview.setUint32(fillOffset + 4, argb, true);
fillOffset += FILL_SIZE; // Move to the next fill
}
});
leafOffset += LEAF_ATTR_SIZE + totalFillsSize;
}
const text = paragraph.textContent;
const textBuffer = new TextEncoder().encode(text);
// Add text content
const textOffset = leafOffset;
heap.set(textBuffer, textOffset);
Module._set_shape_text_content();
}
}
export function addTextShape(text, fonts) {
const numLeaves = 1; // Single text leaf for simplicity
const textBuffer = new TextEncoder().encode(text);
const textSize = textBuffer.byteLength;
// Calculate fills
const fills = [
{
type: "solid",
color: "#ff00ff",
opacity: 1.0,
},
];
const totalFills = fills.length;
const totalFillsSize = totalFills * FILL_SIZE;
// Calculate metadata and total buffer size
const metadataSize = PARAGRAPH_ATTR_SIZE + LEAF_ATTR_SIZE + totalFillsSize;
const totalSize = metadataSize + textSize;
// Allocate buffer
const bufferPtr = allocBytes(totalSize);
const heap = new Uint8Array(Module.HEAPU8.buffer, bufferPtr, totalSize);
const dview = new DataView(heap.buffer, bufferPtr, totalSize);
setParagraphData(dview, {
numLeaves,
textAlign: 0,
textDecoration: 0,
textTransform: 0,
textDirection: 0,
lineHeight: 1.2,
letterSpacing: 0,
});
// Serialize leaf attributes
const leafOffset = PARAGRAPH_ATTR_SIZE;
const fontStyle = getFontStyle('normal');
const fontStyleSerialized = getFontStyle(fontStyle);
const fontSize = 14;
const letterSpacing = 0;
const fontWeight = 400;
const fontFamily = 'MontserratAlternates';
const fontData = getFontFrom(fontFamily, fontWeight, fontStyle, fonts);
const defaultFontId = new Uint32Array([0, 0, 0, 0]);
const fontId = fontData ? getU32(fontData.id) : defaultFontId;
setLeafData(dview, leafOffset, {
fontId,
fontSize,
fontStyle: fontStyleSerialized,
fontWeight,
textDecoration: 0,
textDirection: 0,
textTransform: 0,
letterSpacing,
textSize,
totalFills,
});
// Serialize fills
let fillOffset = leafOffset + LEAF_ATTR_SIZE;
fills.forEach((fill) => {
if (fill.type === "solid") {
const argb = hexToU32ARGB(fill.color, fill.opacity);
dview.setUint8(fillOffset, 0x00, true); // Fill type: solid
dview.setUint32(fillOffset + 4, argb, true);
fillOffset += FILL_SIZE; // Move to the next fill
}
});
// Add text content
const textOffset = metadataSize;
heap.set(textBuffer, textOffset);
// Call the WebAssembly function
Module._set_shape_text_content();
}
export function storeFonts(fonts) {
for (const [fontName, fontStyles] of fonts) {
for (const font of fontStyles) {
const shapeId = getU32('00000000-0000-0000-0000-000000000000');
const fontId = getU32(font.id);
const weight = font.weight;
const style = getFontStyle(font.style);
const size = font.arrayBuffer.byteLength;
const ptr = Module._alloc_bytes(size);
const heap = Module.HEAPU8;
const mem = new Uint8Array(heap.buffer, ptr, size);
mem.set(new Uint8Array(font.arrayBuffer));
const emoji = false
const fallback = false
Module._store_font(
shapeId[0],
shapeId[1],
shapeId[2],
shapeId[3],
fontId[0],
fontId[1],
fontId[2],
fontId[3],
weight,
style,
emoji,
fallback,
);
Module._is_font_uploaded(
fontId[0],
fontId[1],
fontId[2],
fontId[3],
weight,
style,
emoji,
);
}
}
}