root
a95db23240
Extends the in-app sprite editor with four feature sets: - Shape tools: line (L), rectangle (R), ellipse (O) with click-drag live preview and a FILL toggle for outline vs filled rect/ellipse. - Select & move: rectangular marquee (M) to select, drag-to-move via a floating layer, arrow-key nudge, and clipboard ops (Ctrl+C/X/V, Delete, Enter/Esc to commit). Undo/redo and save auto-bake any pending move. - Reference overlay: load any image as an adjustable-opacity backdrop to trace over (rendered under the artwork), with a show/hide toggle. - Color tools: brush opacity slider, persistent custom palette (localStorage; right-click to remove), and an auto-updating recent colors row. Cache-bust admin assets to ?v=20260609c so the update loads without a manual hard-refresh. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
1153 lines
45 KiB
JavaScript
1153 lines
45 KiB
JavaScript
// ADS-Bit In-App Pixel Editor
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// A dependency-free Canvas2D sprite editor for the admin Sprites tab.
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// Edits sprites at their native 500x333 resolution and exports a PNG that
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// is POSTed to the existing /api/admin/sprites/{type} endpoint.
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//
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// Public API:
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// PixelEditor.open(spriteType, { onSave })
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//
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// Tools: pencil, eraser, color picker, fill bucket, pan,
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// line, rectangle, ellipse (outline/filled), rectangular select.
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// Features: zoom/pan, undo/redo, grid overlay, brush size & opacity,
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// custom + recent color palettes, reference-image overlay,
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// selection move/cut/copy/paste/delete, load existing, export PNG.
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(function () {
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'use strict';
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// ----- Sprite dimensions (fixed by the sprite spec) -----
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const SPRITE_W = 500;
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const SPRITE_H = 333;
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// ----- Tunables -----
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const MIN_ZOOM = 0.5;
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const MAX_ZOOM = 40;
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const HISTORY_LIMIT = 40; // max undo snapshots (~666 KB each)
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const GRID_MIN_ZOOM = 6; // only show pixel grid when zoomed in enough
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const RECENT_LIMIT = 10;
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const CUSTOM_KEY = 'pe-custom-palette';
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// ----- Retro palette (SNES-style white/blue/red leaning) -----
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const PALETTE = [
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'#000000', '#1a1a1a', '#3c3c3c', '#5c5c5c', '#9c9c9c', '#fcfcfc',
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'#5c94fc', '#3c5cac', '#1a2c6c', '#b4d4ec', '#54b4fc', '#0c84fc',
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'#fc5454', '#ac2c2c', '#fc9c9c', '#fcd444', '#fc9838', '#a85400',
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'#54fc54', '#2c942c', '#a4e4a4', '#fc54fc', '#9438a8', '#54fcdc',
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];
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const SHAPE_TOOLS = ['line', 'rect', 'ellipse'];
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// ----- Module state -----
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let root = null; // overlay element
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let els = {}; // cached DOM references
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let srcCanvas = null; // 500x333 source-of-truth canvas
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let srcCtx = null;
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let viewCanvas = null; // on-screen scaled render target
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let viewCtx = null;
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let tool = 'pencil';
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let brushSize = 1;
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let brushOpacity = 1; // 0..1, applies to color tools (not eraser)
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let color = '#5c94fc';
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let shapeFill = false;
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let zoom = 1;
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let panX = 0, panY = 0;
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let showGrid = true;
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let spriteType = null;
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let saveCallback = null;
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// Pointer interaction state
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let drawing = false; // pencil/eraser stroke in progress
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let drawingShape = false; // line/rect/ellipse drag in progress
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let panning = false; // pan drag in progress
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let spaceDown = false; // hold space to temporarily pan
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let lastDraw = null; // last source pixel during a stroke {x,y}
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let panStart = null; // {cx,cy,panX,panY} at pan start
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let shapeStart = null; // {x,y} where a shape drag began
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let shapeSnapshot = null; // ImageData captured at shape drag start
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// Selection / move / clipboard
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let selection = null; // {x,y,w,h} committed selection (source px)
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let selDrag = null; // {mode:'new'|'move', sx,sy, ox,oy}
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let floating = null; // {canvas,x,y,w,h} lifted/pasted pixels
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let clipboard = null; // <canvas> of copied pixels
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// Color palettes
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let recentColors = [];
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let customPalette = [];
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// Reference overlay
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let refImage = null;
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let refOpacity = 0.5;
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let refVisible = true;
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// Undo/redo
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let history = [];
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let historyIndex = -1;
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// ===================================================================
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// DOM construction
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// ===================================================================
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function build() {
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if (root) return;
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root = document.createElement('div');
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root.id = 'pe-overlay';
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root.className = 'pe-overlay hidden';
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root.innerHTML = `
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<div class="pe-modal">
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<div class="pe-header">
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<h2 class="retro-title" id="pe-title">PIXEL EDITOR</h2>
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<div class="pe-header-actions">
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<button class="btn btn-small" id="pe-load">LOAD CURRENT</button>
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<button class="btn btn-small" id="pe-clear">CLEAR</button>
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<button class="btn btn-small btn-primary" id="pe-save">SAVE</button>
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<button class="btn btn-small btn-danger" id="pe-close">CLOSE</button>
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</div>
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</div>
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<div class="pe-body">
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<div class="pe-toolbar">
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<div class="pe-tool-group">
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<button class="pe-tool active" data-tool="pencil" title="Pencil (B)">✏</button>
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<button class="pe-tool" data-tool="eraser" title="Eraser (E)">⌫</button>
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<button class="pe-tool" data-tool="picker" title="Color picker (I)">⊙</button>
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<button class="pe-tool" data-tool="fill" title="Fill bucket (F)">▣</button>
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</div>
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<div class="pe-tool-group">
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<button class="pe-tool" data-tool="line" title="Line (L)">╱</button>
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<button class="pe-tool" data-tool="rect" title="Rectangle (R)">▭</button>
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<button class="pe-tool" data-tool="ellipse" title="Ellipse (O)">◯</button>
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<label class="pe-check" title="Fill shapes"><input type="checkbox" id="pe-fill"> FILL</label>
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</div>
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<div class="pe-tool-group">
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<button class="pe-tool" data-tool="select" title="Select & move (M)">⬚</button>
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<button class="pe-tool" data-tool="pan" title="Pan (hold Space)">✥</button>
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</div>
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<div class="pe-tool-group">
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<button class="pe-icon-btn" id="pe-undo" title="Undo (Ctrl+Z)">↶</button>
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<button class="pe-icon-btn" id="pe-redo" title="Redo (Ctrl+Y)">↷</button>
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</div>
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<div class="pe-tool-group">
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<button class="pe-icon-btn" id="pe-zoom-out" title="Zoom out (-)">−</button>
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<button class="pe-icon-btn" id="pe-zoom-in" title="Zoom in (+)">+</button>
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<button class="pe-icon-btn" id="pe-zoom-fit" title="Fit to screen (0)">⤢</button>
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</div>
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<div class="pe-tool-group pe-grid-toggle">
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<label class="pe-check"><input type="checkbox" id="pe-grid" checked> GRID</label>
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</div>
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<div class="pe-tool-group pe-brush-group">
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<span class="pe-tool-label">SIZE</span>
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<input type="range" id="pe-brush" min="1" max="8" value="1">
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<span id="pe-brush-val" class="pe-tool-label">1</span>
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</div>
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</div>
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<div class="pe-canvas-wrap" id="pe-canvas-wrap">
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<canvas id="pe-view"></canvas>
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</div>
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<div class="pe-sidebar">
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<div class="pe-color-current">
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<div class="pe-swatch-large" id="pe-current-swatch"></div>
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<input type="color" id="pe-color-input" value="#5c94fc">
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</div>
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<div class="pe-opacity-group">
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<span class="pe-tool-label">OPACITY <span id="pe-opacity-val">100%</span></span>
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<input type="range" id="pe-opacity" min="10" max="100" value="100">
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</div>
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<div class="pe-palette" id="pe-palette"></div>
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<button class="pe-mini-btn" id="pe-add-swatch" title="Save current color to your custom palette">+ SAVE COLOR</button>
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<div class="pe-subhead" id="pe-custom-head">CUSTOM</div>
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<div class="pe-palette" id="pe-custom-palette"></div>
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<div class="pe-subhead">RECENT</div>
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<div class="pe-palette" id="pe-recent-palette"></div>
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<div class="pe-subhead">REFERENCE</div>
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<div class="pe-ref-controls">
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<div class="pe-ref-row">
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<label class="pe-mini-btn pe-ref-load">LOAD
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<input type="file" id="pe-ref-file" accept="image/*" hidden>
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</label>
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<button class="pe-mini-btn" id="pe-ref-clear">CLEAR</button>
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</div>
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<label class="pe-check"><input type="checkbox" id="pe-ref-show" checked> SHOW</label>
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<input type="range" id="pe-ref-opacity" min="5" max="100" value="50" title="Reference opacity">
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</div>
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<div class="pe-readout">
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<div>POS <span id="pe-pos">--, --</span></div>
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<div>ZOOM <span id="pe-zoom-val">100%</span></div>
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<div>SEL <span id="pe-sel">none</span></div>
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</div>
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</div>
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</div>
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</div>
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`;
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document.body.appendChild(root);
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// Cache references
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els.title = root.querySelector('#pe-title');
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els.wrap = root.querySelector('#pe-canvas-wrap');
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els.palette = root.querySelector('#pe-palette');
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els.customPalette = root.querySelector('#pe-custom-palette');
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els.recentPalette = root.querySelector('#pe-recent-palette');
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els.currentSwatch = root.querySelector('#pe-current-swatch');
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els.colorInput = root.querySelector('#pe-color-input');
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els.pos = root.querySelector('#pe-pos');
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els.zoomVal = root.querySelector('#pe-zoom-val');
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els.selVal = root.querySelector('#pe-sel');
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els.brush = root.querySelector('#pe-brush');
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els.brushVal = root.querySelector('#pe-brush-val');
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els.fill = root.querySelector('#pe-fill');
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els.opacity = root.querySelector('#pe-opacity');
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els.opacityVal = root.querySelector('#pe-opacity-val');
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els.grid = root.querySelector('#pe-grid');
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els.undo = root.querySelector('#pe-undo');
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els.redo = root.querySelector('#pe-redo');
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els.refFile = root.querySelector('#pe-ref-file');
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els.refShow = root.querySelector('#pe-ref-show');
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els.refOpacity = root.querySelector('#pe-ref-opacity');
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viewCanvas = root.querySelector('#pe-view');
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viewCtx = viewCanvas.getContext('2d');
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// Source-of-truth canvas (offscreen)
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srcCanvas = document.createElement('canvas');
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srcCanvas.width = SPRITE_W;
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srcCanvas.height = SPRITE_H;
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srcCtx = srcCanvas.getContext('2d', { willReadFrequently: true });
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buildPalette(els.palette, PALETTE, false);
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wireEvents();
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}
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// Build a row of color swatches. `removable` enables right-click removal
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// (used by the custom palette).
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function buildPalette(container, colors, removable) {
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container.innerHTML = '';
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colors.forEach(c => {
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const sw = document.createElement('button');
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sw.className = 'pe-swatch';
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sw.style.background = c;
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sw.title = removable ? `${c} (right-click to remove)` : c;
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sw.addEventListener('click', () => setColor(c));
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if (removable) {
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sw.addEventListener('contextmenu', (e) => {
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e.preventDefault();
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customPalette = customPalette.filter(x => x !== c);
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saveCustomPalette();
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buildCustomPalette();
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});
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}
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container.appendChild(sw);
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});
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}
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function buildCustomPalette() {
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buildPalette(els.customPalette, customPalette, true);
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root.querySelector('#pe-custom-head').style.opacity = customPalette.length ? '1' : '0.5';
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}
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function buildRecentPalette() {
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buildPalette(els.recentPalette, recentColors, false);
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}
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// ===================================================================
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// Event wiring
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// ===================================================================
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function wireEvents() {
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root.querySelectorAll('.pe-tool').forEach(btn => {
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btn.addEventListener('click', () => setTool(btn.dataset.tool));
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});
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root.querySelector('#pe-close').addEventListener('click', () => {
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if (confirmDiscard()) close();
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});
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root.querySelector('#pe-save').addEventListener('click', save);
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root.querySelector('#pe-load').addEventListener('click', () => loadExisting(true));
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root.querySelector('#pe-clear').addEventListener('click', clearCanvas);
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root.querySelector('#pe-zoom-in').addEventListener('click', () => zoomAt(1.25, centerPoint()));
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root.querySelector('#pe-zoom-out').addEventListener('click', () => zoomAt(0.8, centerPoint()));
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root.querySelector('#pe-zoom-fit').addEventListener('click', fitToScreen);
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els.undo.addEventListener('click', undo);
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els.redo.addEventListener('click', redo);
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els.grid.addEventListener('change', () => { showGrid = els.grid.checked; render(); });
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els.brush.addEventListener('input', () => {
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brushSize = parseInt(els.brush.value, 10);
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els.brushVal.textContent = brushSize;
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});
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els.fill.addEventListener('change', () => { shapeFill = els.fill.checked; });
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els.opacity.addEventListener('input', () => {
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brushOpacity = parseInt(els.opacity.value, 10) / 100;
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els.opacityVal.textContent = els.opacity.value + '%';
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});
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els.colorInput.addEventListener('input', () => setColor(els.colorInput.value));
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root.querySelector('#pe-add-swatch').addEventListener('click', addCurrentColorToPalette);
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// Reference overlay
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els.refFile.addEventListener('change', (e) => {
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const f = e.target.files[0];
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if (f) loadRefFromFile(f);
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e.target.value = '';
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});
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root.querySelector('#pe-ref-clear').addEventListener('click', clearRef);
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els.refShow.addEventListener('change', () => { refVisible = els.refShow.checked; render(); });
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els.refOpacity.addEventListener('input', () => {
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refOpacity = parseInt(els.refOpacity.value, 10) / 100;
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render();
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});
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// Canvas pointer events
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viewCanvas.addEventListener('pointerdown', onPointerDown);
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viewCanvas.addEventListener('pointermove', onPointerMove);
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window.addEventListener('pointerup', onPointerUp);
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viewCanvas.addEventListener('pointerleave', () => { els.pos.textContent = '--, --'; });
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viewCanvas.addEventListener('wheel', onWheel, { passive: false });
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viewCanvas.addEventListener('contextmenu', e => e.preventDefault());
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document.addEventListener('keydown', onKeyDown);
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document.addEventListener('keyup', onKeyUp);
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window.addEventListener('resize', () => { if (isOpen()) { resizeView(); render(); } });
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}
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// ===================================================================
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// Public open/close
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// ===================================================================
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function open(type, opts) {
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opts = opts || {};
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build();
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spriteType = type;
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saveCallback = opts.onSave || null;
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els.title.textContent = 'PIXEL EDITOR — ' + type;
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// Reset transient state
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zoom = 1; panX = 0; panY = 0;
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history = []; historyIndex = -1;
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selection = null; selDrag = null; floating = null;
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drawing = drawingShape = false; shapeSnapshot = null;
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refImage = null; refVisible = true;
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recentColors = [];
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brushOpacity = 1;
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shapeFill = false;
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els.opacity.value = 100; els.opacityVal.textContent = '100%';
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els.fill.checked = false;
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els.refShow.checked = true;
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loadCustomPalette();
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buildCustomPalette();
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buildRecentPalette();
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setTool('pencil');
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updateSelReadout();
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srcCtx.clearRect(0, 0, SPRITE_W, SPRITE_H);
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root.classList.remove('hidden');
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document.body.classList.add('pe-open');
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loadExisting(false, () => {
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resizeView();
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fitToScreen();
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pushHistory(); // baseline snapshot
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updateHistoryButtons();
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});
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}
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function isOpen() { return root && !root.classList.contains('hidden'); }
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function close() {
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root.classList.add('hidden');
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document.body.classList.remove('pe-open');
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spriteType = null;
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saveCallback = null;
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}
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function confirmDiscard() {
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if (historyIndex > 0 || floating) {
|
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return window.confirm('Discard unsaved changes and close the editor?');
|
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}
|
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return true;
|
||
}
|
||
|
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// ===================================================================
|
||
// Loading / clearing
|
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// ===================================================================
|
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function loadExisting(recordHistory, done) {
|
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const url = `/images/${spriteType}.png?v=${Date.now()}`;
|
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const img = new Image();
|
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img.onload = () => {
|
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srcCtx.clearRect(0, 0, SPRITE_W, SPRITE_H);
|
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srcCtx.imageSmoothingEnabled = false;
|
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srcCtx.drawImage(img, 0, 0, SPRITE_W, SPRITE_H);
|
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if (recordHistory) { pushHistory(); toast('Loaded current sprite'); }
|
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render();
|
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if (done) done();
|
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};
|
||
img.onerror = () => {
|
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if (recordHistory) { pushHistory(); toast('No existing sprite — blank canvas', true); }
|
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render();
|
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if (done) done();
|
||
};
|
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img.src = url;
|
||
}
|
||
|
||
function clearCanvas() {
|
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floating = null; selection = null; updateSelReadout();
|
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srcCtx.clearRect(0, 0, SPRITE_W, SPRITE_H);
|
||
pushHistory();
|
||
render();
|
||
}
|
||
|
||
// ===================================================================
|
||
// Tool / color selection
|
||
// ===================================================================
|
||
function setTool(t) {
|
||
if (t !== tool) {
|
||
stampFloating(); // commit any lifted pixels before switching
|
||
if (t !== 'select') { selection = null; updateSelReadout(); }
|
||
}
|
||
tool = t;
|
||
root.querySelectorAll('.pe-tool').forEach(b => {
|
||
b.classList.toggle('active', b.dataset.tool === t);
|
||
});
|
||
updateCursor();
|
||
}
|
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|
||
function setColor(c) {
|
||
color = c;
|
||
els.currentSwatch.style.background = c;
|
||
if (els.colorInput.value.toLowerCase() !== c.toLowerCase()) {
|
||
els.colorInput.value = c;
|
||
}
|
||
}
|
||
|
||
function recordColor(c) {
|
||
c = c.toLowerCase();
|
||
recentColors = recentColors.filter(x => x !== c);
|
||
recentColors.unshift(c);
|
||
if (recentColors.length > RECENT_LIMIT) recentColors.length = RECENT_LIMIT;
|
||
buildRecentPalette();
|
||
}
|
||
|
||
function addCurrentColorToPalette() {
|
||
const c = color.toLowerCase();
|
||
if (!customPalette.includes(c)) {
|
||
customPalette.push(c);
|
||
saveCustomPalette();
|
||
buildCustomPalette();
|
||
toast('Color saved to palette');
|
||
}
|
||
}
|
||
|
||
function loadCustomPalette() {
|
||
try { customPalette = JSON.parse(localStorage.getItem(CUSTOM_KEY) || '[]'); }
|
||
catch (e) { customPalette = []; }
|
||
}
|
||
function saveCustomPalette() {
|
||
try { localStorage.setItem(CUSTOM_KEY, JSON.stringify(customPalette)); } catch (e) { /* ignore */ }
|
||
}
|
||
|
||
function updateCursor() {
|
||
let cur = 'crosshair';
|
||
if (tool === 'pan' || spaceDown) cur = panning ? 'grabbing' : 'grab';
|
||
else if (tool === 'picker') cur = 'cell';
|
||
else if (tool === 'select') cur = 'crosshair';
|
||
viewCanvas.style.cursor = cur;
|
||
}
|
||
|
||
function updateSelReadout() {
|
||
if (floating) els.selVal.textContent = `${floating.w}×${floating.h} (moving)`;
|
||
else if (selection) els.selVal.textContent = `${selection.w}×${selection.h}`;
|
||
else els.selVal.textContent = 'none';
|
||
}
|
||
|
||
// ===================================================================
|
||
// Reference overlay
|
||
// ===================================================================
|
||
function loadRefFromFile(file) {
|
||
const url = URL.createObjectURL(file);
|
||
const img = new Image();
|
||
img.onload = () => {
|
||
refImage = img;
|
||
refVisible = true;
|
||
els.refShow.checked = true;
|
||
render();
|
||
URL.revokeObjectURL(url);
|
||
toast('Reference loaded');
|
||
};
|
||
img.onerror = () => { toast('Could not load reference image', true); URL.revokeObjectURL(url); };
|
||
img.src = url;
|
||
}
|
||
|
||
function clearRef() {
|
||
refImage = null;
|
||
render();
|
||
}
|
||
|
||
// ===================================================================
|
||
// Coordinate mapping
|
||
// ===================================================================
|
||
function eventToSource(e) {
|
||
const rect = viewCanvas.getBoundingClientRect();
|
||
const cx = e.clientX - rect.left;
|
||
const cy = e.clientY - rect.top;
|
||
return {
|
||
x: Math.floor((cx - panX) / zoom),
|
||
y: Math.floor((cy - panY) / zoom),
|
||
cx, cy,
|
||
};
|
||
}
|
||
|
||
function centerPoint() {
|
||
return { cx: viewCanvas.width / 2, cy: viewCanvas.height / 2 };
|
||
}
|
||
|
||
function isShapeTool(t) { return SHAPE_TOOLS.indexOf(t) !== -1; }
|
||
function pointInRect(p, r) { return r && p.x >= r.x && p.x < r.x + r.w && p.y >= r.y && p.y < r.y + r.h; }
|
||
|
||
// ===================================================================
|
||
// Pointer handlers
|
||
// ===================================================================
|
||
function onPointerDown(e) {
|
||
e.preventDefault();
|
||
viewCanvas.setPointerCapture(e.pointerId);
|
||
const p = eventToSource(e);
|
||
|
||
// Pan: pan tool, space held, or middle mouse.
|
||
if (tool === 'pan' || spaceDown || e.button === 1) {
|
||
panning = true;
|
||
panStart = { cx: e.clientX, cy: e.clientY, panX, panY };
|
||
updateCursor();
|
||
return;
|
||
}
|
||
|
||
if (tool === 'picker') { pickColor(p.x, p.y); return; }
|
||
|
||
if (tool === 'select') { onSelectDown(p); return; }
|
||
|
||
// All remaining tools draw onto the canvas — commit any floating first.
|
||
stampFloating();
|
||
|
||
if (tool === 'fill') {
|
||
floodFill(p.x, p.y);
|
||
pushHistory();
|
||
recordColor(color);
|
||
render();
|
||
return;
|
||
}
|
||
|
||
if (isShapeTool(tool)) {
|
||
shapeStart = { x: p.x, y: p.y };
|
||
shapeSnapshot = srcCtx.getImageData(0, 0, SPRITE_W, SPRITE_H);
|
||
drawingShape = true;
|
||
rasterShape(tool, p.x, p.y, p.x, p.y);
|
||
render();
|
||
return;
|
||
}
|
||
|
||
// Pencil / eraser stroke begins.
|
||
drawing = true;
|
||
lastDraw = null;
|
||
applyBrush(p.x, p.y);
|
||
lastDraw = { x: p.x, y: p.y };
|
||
render();
|
||
}
|
||
|
||
function onSelectDown(p) {
|
||
if (floating) {
|
||
if (pointInRect(p, floating)) {
|
||
selDrag = { mode: 'move', sx: p.x, sy: p.y, ox: floating.x, oy: floating.y };
|
||
return;
|
||
}
|
||
stampFloating(); // clicked outside → drop it in place
|
||
}
|
||
if (selection && pointInRect(p, selection)) {
|
||
liftSelection(); // begin moving the committed selection
|
||
selDrag = { mode: 'move', sx: p.x, sy: p.y, ox: floating.x, oy: floating.y };
|
||
return;
|
||
}
|
||
// Begin a new selection rectangle.
|
||
selDrag = { mode: 'new', sx: p.x, sy: p.y };
|
||
selection = { x: p.x, y: p.y, w: 1, h: 1 };
|
||
updateSelReadout();
|
||
render();
|
||
}
|
||
|
||
function onPointerMove(e) {
|
||
const p = eventToSource(e);
|
||
els.pos.textContent = (p.x >= 0 && p.x < SPRITE_W && p.y >= 0 && p.y < SPRITE_H)
|
||
? `${p.x}, ${p.y}` : '--, --';
|
||
|
||
if (panning && panStart) {
|
||
panX = panStart.panX + (e.clientX - panStart.cx);
|
||
panY = panStart.panY + (e.clientY - panStart.cy);
|
||
render();
|
||
return;
|
||
}
|
||
|
||
if (selDrag) {
|
||
if (selDrag.mode === 'new') {
|
||
const x0 = clamp(selDrag.sx, 0, SPRITE_W - 1), y0 = clamp(selDrag.sy, 0, SPRITE_H - 1);
|
||
const x1 = clamp(p.x, 0, SPRITE_W - 1), y1 = clamp(p.y, 0, SPRITE_H - 1);
|
||
selection = {
|
||
x: Math.min(x0, x1), y: Math.min(y0, y1),
|
||
w: Math.abs(x1 - x0) + 1, h: Math.abs(y1 - y0) + 1
|
||
};
|
||
} else if (floating) {
|
||
floating.x = selDrag.ox + (p.x - selDrag.sx);
|
||
floating.y = selDrag.oy + (p.y - selDrag.sy);
|
||
}
|
||
updateSelReadout();
|
||
render();
|
||
return;
|
||
}
|
||
|
||
if (drawingShape) {
|
||
srcCtx.putImageData(shapeSnapshot, 0, 0);
|
||
rasterShape(tool, shapeStart.x, shapeStart.y, p.x, p.y);
|
||
render();
|
||
return;
|
||
}
|
||
|
||
if (drawing && (tool === 'pencil' || tool === 'eraser')) {
|
||
if (lastDraw) lineApply(lastDraw.x, lastDraw.y, p.x, p.y);
|
||
else applyBrush(p.x, p.y);
|
||
lastDraw = { x: p.x, y: p.y };
|
||
render();
|
||
}
|
||
}
|
||
|
||
function onPointerUp() {
|
||
if (selDrag) {
|
||
if (selDrag.mode === 'new' && selection && (selection.w < 1 || selection.h < 1)) {
|
||
selection = null;
|
||
}
|
||
selDrag = null;
|
||
updateSelReadout();
|
||
render();
|
||
}
|
||
if (drawingShape) {
|
||
drawingShape = false;
|
||
shapeSnapshot = null;
|
||
pushHistory();
|
||
recordColor(color);
|
||
}
|
||
if (drawing) {
|
||
drawing = false;
|
||
lastDraw = null;
|
||
pushHistory();
|
||
if (tool !== 'eraser') recordColor(color);
|
||
}
|
||
if (panning) {
|
||
panning = false;
|
||
panStart = null;
|
||
updateCursor();
|
||
}
|
||
}
|
||
|
||
function onWheel(e) {
|
||
e.preventDefault();
|
||
const rect = viewCanvas.getBoundingClientRect();
|
||
zoomAt(e.deltaY < 0 ? 1.15 : 0.87, { cx: e.clientX - rect.left, cy: e.clientY - rect.top });
|
||
}
|
||
|
||
// ===================================================================
|
||
// Drawing primitives (operate on the 500x333 source canvas)
|
||
// ===================================================================
|
||
function applyBrush(x, y) {
|
||
const half = Math.floor(brushSize / 2);
|
||
const x0 = x - half, y0 = y - half;
|
||
if (tool === 'eraser') {
|
||
srcCtx.clearRect(x0, y0, brushSize, brushSize);
|
||
} else {
|
||
srcCtx.globalAlpha = brushOpacity;
|
||
srcCtx.fillStyle = color;
|
||
srcCtx.fillRect(x0, y0, brushSize, brushSize);
|
||
srcCtx.globalAlpha = 1;
|
||
}
|
||
}
|
||
|
||
// Bresenham line, stamping the brush along it.
|
||
function lineApply(x0, y0, x1, y1) {
|
||
const dx = Math.abs(x1 - x0), dy = Math.abs(y1 - y0);
|
||
const sx = x0 < x1 ? 1 : -1, sy = y0 < y1 ? 1 : -1;
|
||
let err = dx - dy;
|
||
while (true) {
|
||
applyBrush(x0, y0);
|
||
if (x0 === x1 && y0 === y1) break;
|
||
const e2 = 2 * err;
|
||
if (e2 > -dy) { err -= dy; x0 += sx; }
|
||
if (e2 < dx) { err += dx; y0 += sy; }
|
||
}
|
||
}
|
||
|
||
// ----- Shape rasterizers (commit into srcCtx) -----
|
||
function rasterShape(t, x0, y0, x1, y1) {
|
||
if (t === 'line') lineApply(x0, y0, x1, y1);
|
||
else if (t === 'rect') rasterRect(x0, y0, x1, y1, shapeFill);
|
||
else if (t === 'ellipse') rasterEllipse(x0, y0, x1, y1, shapeFill);
|
||
}
|
||
|
||
function rasterRect(x0, y0, x1, y1, fill) {
|
||
const left = Math.min(x0, x1), right = Math.max(x0, x1);
|
||
const top = Math.min(y0, y1), bottom = Math.max(y0, y1);
|
||
if (fill) {
|
||
srcCtx.globalAlpha = brushOpacity;
|
||
srcCtx.fillStyle = color;
|
||
srcCtx.fillRect(left, top, right - left + 1, bottom - top + 1);
|
||
srcCtx.globalAlpha = 1;
|
||
} else {
|
||
lineApply(left, top, right, top);
|
||
lineApply(left, bottom, right, bottom);
|
||
lineApply(left, top, left, bottom);
|
||
lineApply(right, top, right, bottom);
|
||
}
|
||
}
|
||
|
||
function rasterEllipse(x0, y0, x1, y1, fill) {
|
||
const left = Math.min(x0, x1), right = Math.max(x0, x1);
|
||
const top = Math.min(y0, y1), bottom = Math.max(y0, y1);
|
||
const a = (right - left) / 2, b = (bottom - top) / 2;
|
||
const cx = (left + right) / 2, cy = (top + bottom) / 2;
|
||
if (a < 0.5 || b < 0.5) { lineApply(left, top, right, bottom); return; }
|
||
|
||
if (fill) {
|
||
srcCtx.globalAlpha = brushOpacity;
|
||
srcCtx.fillStyle = color;
|
||
for (let y = top; y <= bottom; y++) {
|
||
const ny = (y - cy) / b;
|
||
if (Math.abs(ny) > 1) continue;
|
||
const dx = a * Math.sqrt(1 - ny * ny);
|
||
const xl = Math.round(cx - dx), xr = Math.round(cx + dx);
|
||
srcCtx.fillRect(xl, y, xr - xl + 1, 1);
|
||
}
|
||
srcCtx.globalAlpha = 1;
|
||
} else {
|
||
// Scan rows then columns so the 1px outline has no gaps.
|
||
for (let y = top; y <= bottom; y++) {
|
||
const ny = (y - cy) / b;
|
||
if (Math.abs(ny) > 1) continue;
|
||
const dx = a * Math.sqrt(1 - ny * ny);
|
||
applyBrush(Math.round(cx - dx), y);
|
||
applyBrush(Math.round(cx + dx), y);
|
||
}
|
||
for (let x = left; x <= right; x++) {
|
||
const nx = (x - cx) / a;
|
||
if (Math.abs(nx) > 1) continue;
|
||
const dy = b * Math.sqrt(1 - nx * nx);
|
||
applyBrush(x, Math.round(cy - dy));
|
||
applyBrush(x, Math.round(cy + dy));
|
||
}
|
||
}
|
||
}
|
||
|
||
function pickColor(x, y) {
|
||
if (x < 0 || x >= SPRITE_W || y < 0 || y >= SPRITE_H) return;
|
||
const d = srcCtx.getImageData(x, y, 1, 1).data;
|
||
if (d[3] === 0) { toast('Picked transparent pixel', true); return; }
|
||
setColor(rgbToHex(d[0], d[1], d[2]));
|
||
setTool('pencil');
|
||
}
|
||
|
||
// 4-neighbour flood fill with exact-color matching.
|
||
function floodFill(sx, sy) {
|
||
if (sx < 0 || sx >= SPRITE_W || sy < 0 || sy >= SPRITE_H) return;
|
||
const img = srcCtx.getImageData(0, 0, SPRITE_W, SPRITE_H);
|
||
const data = img.data;
|
||
const idx = (sy * SPRITE_W + sx) * 4;
|
||
const target = [data[idx], data[idx + 1], data[idx + 2], data[idx + 3]];
|
||
const fill = hexToRgb(color);
|
||
const fillA = 255;
|
||
|
||
if (target[0] === fill.r && target[1] === fill.g &&
|
||
target[2] === fill.b && target[3] === fillA) return;
|
||
|
||
const stack = [sy * SPRITE_W + sx];
|
||
while (stack.length) {
|
||
const pos = stack.pop();
|
||
const o = pos * 4;
|
||
if (data[o] !== target[0] || data[o + 1] !== target[1] ||
|
||
data[o + 2] !== target[2] || data[o + 3] !== target[3]) continue;
|
||
data[o] = fill.r; data[o + 1] = fill.g; data[o + 2] = fill.b; data[o + 3] = fillA;
|
||
const px = pos % SPRITE_W, py = (pos - px) / SPRITE_W;
|
||
if (px > 0) stack.push(pos - 1);
|
||
if (px < SPRITE_W - 1) stack.push(pos + 1);
|
||
if (py > 0) stack.push(pos - SPRITE_W);
|
||
if (py < SPRITE_H - 1) stack.push(pos + SPRITE_W);
|
||
}
|
||
srcCtx.putImageData(img, 0, 0);
|
||
}
|
||
|
||
// ===================================================================
|
||
// Selection / move / clipboard
|
||
// ===================================================================
|
||
function clampSelection() {
|
||
if (!selection) return;
|
||
const x = clamp(selection.x, 0, SPRITE_W - 1);
|
||
const y = clamp(selection.y, 0, SPRITE_H - 1);
|
||
selection = {
|
||
x, y,
|
||
w: clamp(selection.w, 1, SPRITE_W - x),
|
||
h: clamp(selection.h, 1, SPRITE_H - y),
|
||
};
|
||
}
|
||
|
||
// Lift the selected pixels off the canvas into a floating layer.
|
||
function liftSelection() {
|
||
clampSelection();
|
||
const { x, y, w, h } = selection;
|
||
const c = document.createElement('canvas');
|
||
c.width = w; c.height = h;
|
||
c.getContext('2d').drawImage(srcCanvas, x, y, w, h, 0, 0, w, h);
|
||
srcCtx.clearRect(x, y, w, h);
|
||
floating = { canvas: c, x, y, w, h };
|
||
selection = null;
|
||
updateSelReadout();
|
||
}
|
||
|
||
// Composite the floating layer back onto the canvas and record history.
|
||
function stampFloating() {
|
||
if (!floating) return;
|
||
srcCtx.drawImage(floating.canvas, floating.x, floating.y);
|
||
floating = null;
|
||
updateSelReadout();
|
||
pushHistory();
|
||
render();
|
||
}
|
||
|
||
function copySelection() {
|
||
if (!selection) { toast('Nothing selected', true); return; }
|
||
clampSelection();
|
||
const { x, y, w, h } = selection;
|
||
const c = document.createElement('canvas');
|
||
c.width = w; c.height = h;
|
||
c.getContext('2d').drawImage(srcCanvas, x, y, w, h, 0, 0, w, h);
|
||
clipboard = c;
|
||
toast(`Copied ${w}×${h}`);
|
||
}
|
||
|
||
function cutSelection() {
|
||
if (!selection) { toast('Nothing selected', true); return; }
|
||
copySelection();
|
||
const { x, y, w, h } = selection;
|
||
srcCtx.clearRect(x, y, w, h);
|
||
selection = null;
|
||
updateSelReadout();
|
||
pushHistory();
|
||
render();
|
||
}
|
||
|
||
function pasteClipboard() {
|
||
if (!clipboard) { toast('Clipboard empty', true); return; }
|
||
stampFloating();
|
||
const c = document.createElement('canvas');
|
||
c.width = clipboard.width; c.height = clipboard.height;
|
||
c.getContext('2d').drawImage(clipboard, 0, 0);
|
||
const x = selection ? selection.x : 0;
|
||
const y = selection ? selection.y : 0;
|
||
floating = { canvas: c, x, y, w: c.width, h: c.height };
|
||
setTool('select');
|
||
updateSelReadout();
|
||
render();
|
||
toast('Pasted — drag to position, Enter to place');
|
||
}
|
||
|
||
function deleteSelection() {
|
||
if (floating) { floating = null; updateSelReadout(); pushHistory(); render(); return; }
|
||
if (!selection) return;
|
||
clampSelection();
|
||
const { x, y, w, h } = selection;
|
||
srcCtx.clearRect(x, y, w, h);
|
||
pushHistory();
|
||
render();
|
||
}
|
||
|
||
function nudgeFloating(dx, dy) {
|
||
if (!floating && selection) liftSelection();
|
||
if (floating) {
|
||
floating.x += dx; floating.y += dy;
|
||
render();
|
||
}
|
||
}
|
||
|
||
// ===================================================================
|
||
// Zoom / pan
|
||
// ===================================================================
|
||
function zoomAt(factor, focus) {
|
||
const newZoom = clamp(zoom * factor, MIN_ZOOM, MAX_ZOOM);
|
||
if (newZoom === zoom) return;
|
||
const sxBefore = (focus.cx - panX) / zoom;
|
||
const syBefore = (focus.cy - panY) / zoom;
|
||
zoom = newZoom;
|
||
panX = focus.cx - sxBefore * zoom;
|
||
panY = focus.cy - syBefore * zoom;
|
||
render();
|
||
}
|
||
|
||
function fitToScreen() {
|
||
const w = viewCanvas.width, h = viewCanvas.height;
|
||
const margin = 24;
|
||
zoom = clamp(Math.min((w - margin) / SPRITE_W, (h - margin) / SPRITE_H), MIN_ZOOM, MAX_ZOOM);
|
||
panX = (w - SPRITE_W * zoom) / 2;
|
||
panY = (h - SPRITE_H * zoom) / 2;
|
||
render();
|
||
}
|
||
|
||
function resizeView() {
|
||
const rect = els.wrap.getBoundingClientRect();
|
||
viewCanvas.width = Math.max(100, Math.floor(rect.width));
|
||
viewCanvas.height = Math.max(100, Math.floor(rect.height));
|
||
}
|
||
|
||
// ===================================================================
|
||
// Rendering
|
||
// ===================================================================
|
||
function render() {
|
||
const w = viewCanvas.width, h = viewCanvas.height;
|
||
viewCtx.clearRect(0, 0, w, h);
|
||
|
||
const dw = SPRITE_W * zoom, dh = SPRITE_H * zoom;
|
||
|
||
drawCheckerboard(panX, panY, dw, dh);
|
||
|
||
// Reference overlay sits under the sprite so you can trace over it.
|
||
if (refImage && refVisible) {
|
||
viewCtx.globalAlpha = refOpacity;
|
||
viewCtx.imageSmoothingEnabled = false;
|
||
viewCtx.drawImage(refImage, panX, panY, dw, dh);
|
||
viewCtx.globalAlpha = 1;
|
||
}
|
||
|
||
viewCtx.imageSmoothingEnabled = false;
|
||
viewCtx.drawImage(srcCanvas, panX, panY, dw, dh);
|
||
|
||
// Floating (moved/pasted) pixels render above the sprite.
|
||
if (floating) {
|
||
viewCtx.imageSmoothingEnabled = false;
|
||
viewCtx.drawImage(floating.canvas,
|
||
panX + floating.x * zoom, panY + floating.y * zoom,
|
||
floating.w * zoom, floating.h * zoom);
|
||
}
|
||
|
||
// Artboard border.
|
||
viewCtx.strokeStyle = '#5c94fc';
|
||
viewCtx.lineWidth = 1;
|
||
viewCtx.strokeRect(panX + 0.5, panY + 0.5, dw, dh);
|
||
|
||
if (showGrid && zoom >= GRID_MIN_ZOOM) drawGrid(dw, dh);
|
||
|
||
if (selection) drawMarquee(selection, '#fcd444');
|
||
if (floating) drawMarquee(floating, '#54fc54');
|
||
|
||
els.zoomVal.textContent = Math.round(zoom * 100) + '%';
|
||
}
|
||
|
||
function drawMarquee(r, stroke) {
|
||
viewCtx.save();
|
||
viewCtx.setLineDash([4, 3]);
|
||
viewCtx.strokeStyle = stroke;
|
||
viewCtx.lineWidth = 1;
|
||
viewCtx.strokeRect(panX + r.x * zoom + 0.5, panY + r.y * zoom + 0.5, r.w * zoom, r.h * zoom);
|
||
viewCtx.restore();
|
||
}
|
||
|
||
function drawCheckerboard(ox, oy, dw, dh) {
|
||
const tile = 8;
|
||
viewCtx.save();
|
||
viewCtx.beginPath();
|
||
viewCtx.rect(ox, oy, dw, dh);
|
||
viewCtx.clip();
|
||
const startX = Math.floor(ox / tile) * tile;
|
||
const startY = Math.floor(oy / tile) * tile;
|
||
for (let y = startY; y < oy + dh; y += tile) {
|
||
for (let x = startX; x < ox + dw; x += tile) {
|
||
const odd = ((x / tile) + (y / tile)) % 2 !== 0;
|
||
viewCtx.fillStyle = odd ? '#2c2c2c' : '#3c3c3c';
|
||
viewCtx.fillRect(x, y, tile, tile);
|
||
}
|
||
}
|
||
viewCtx.restore();
|
||
}
|
||
|
||
function drawGrid(dw, dh) {
|
||
viewCtx.strokeStyle = 'rgba(255,255,255,0.18)';
|
||
viewCtx.lineWidth = 1;
|
||
viewCtx.beginPath();
|
||
for (let x = 0; x <= SPRITE_W; x++) {
|
||
const px = Math.round(panX + x * zoom) + 0.5;
|
||
viewCtx.moveTo(px, panY);
|
||
viewCtx.lineTo(px, panY + dh);
|
||
}
|
||
for (let y = 0; y <= SPRITE_H; y++) {
|
||
const py = Math.round(panY + y * zoom) + 0.5;
|
||
viewCtx.moveTo(panX, py);
|
||
viewCtx.lineTo(panX + dw, py);
|
||
}
|
||
viewCtx.stroke();
|
||
}
|
||
|
||
// ===================================================================
|
||
// Undo / redo
|
||
// ===================================================================
|
||
function pushHistory() {
|
||
if (historyIndex < history.length - 1) {
|
||
history = history.slice(0, historyIndex + 1);
|
||
}
|
||
history.push(srcCtx.getImageData(0, 0, SPRITE_W, SPRITE_H));
|
||
if (history.length > HISTORY_LIMIT) history.shift();
|
||
historyIndex = history.length - 1;
|
||
updateHistoryButtons();
|
||
}
|
||
|
||
function restore(index) {
|
||
// Pending floating/selection are invalidated by an undo/redo.
|
||
floating = null; selection = null; selDrag = null;
|
||
updateSelReadout();
|
||
srcCtx.putImageData(history[index], 0, 0);
|
||
render();
|
||
updateHistoryButtons();
|
||
}
|
||
|
||
function undo() {
|
||
stampFloating();
|
||
if (historyIndex <= 0) return;
|
||
historyIndex--;
|
||
restore(historyIndex);
|
||
}
|
||
|
||
function redo() {
|
||
if (historyIndex >= history.length - 1) return;
|
||
historyIndex++;
|
||
restore(historyIndex);
|
||
}
|
||
|
||
function updateHistoryButtons() {
|
||
els.undo.disabled = historyIndex <= 0 && !floating;
|
||
els.redo.disabled = historyIndex >= history.length - 1;
|
||
}
|
||
|
||
// ===================================================================
|
||
// Save / export
|
||
// ===================================================================
|
||
function save() {
|
||
if (!spriteType) return;
|
||
stampFloating(); // bake any floating pixels before exporting
|
||
const saveBtn = root.querySelector('#pe-save');
|
||
saveBtn.disabled = true;
|
||
saveBtn.textContent = 'SAVING…';
|
||
srcCanvas.toBlob(async (blob) => {
|
||
if (!blob) {
|
||
toast('Export failed', true);
|
||
saveBtn.disabled = false; saveBtn.textContent = 'SAVE';
|
||
return;
|
||
}
|
||
const fd = new FormData();
|
||
fd.append('file', blob, `${spriteType}.png`);
|
||
try {
|
||
const res = await fetch(`/api/admin/sprites/${spriteType}`, { method: 'POST', body: fd });
|
||
if (res.ok) {
|
||
toast(`${spriteType} sprite saved`);
|
||
history = [srcCtx.getImageData(0, 0, SPRITE_W, SPRITE_H)];
|
||
historyIndex = 0;
|
||
updateHistoryButtons();
|
||
if (saveCallback) saveCallback();
|
||
} else {
|
||
const err = await res.json().catch(() => ({}));
|
||
toast(err.error || 'Save failed', true);
|
||
}
|
||
} catch (e) {
|
||
toast('Connection error', true);
|
||
}
|
||
saveBtn.disabled = false; saveBtn.textContent = 'SAVE';
|
||
}, 'image/png');
|
||
}
|
||
|
||
// ===================================================================
|
||
// Keyboard shortcuts
|
||
// ===================================================================
|
||
function onKeyDown(e) {
|
||
if (!isOpen()) return;
|
||
// Don't hijack typing in text/number inputs.
|
||
if (e.target.tagName === 'INPUT' && e.target.type !== 'checkbox' && e.target.type !== 'range') {
|
||
if (e.key === 'Escape') e.target.blur();
|
||
return;
|
||
}
|
||
|
||
const ctrl = e.ctrlKey || e.metaKey;
|
||
if (ctrl) {
|
||
const k = e.key.toLowerCase();
|
||
if (k === 'z' && !e.shiftKey) { e.preventDefault(); undo(); return; }
|
||
if (k === 'y' || (k === 'z' && e.shiftKey)) { e.preventDefault(); redo(); return; }
|
||
if (k === 'c') { e.preventDefault(); copySelection(); return; }
|
||
if (k === 'x') { e.preventDefault(); cutSelection(); return; }
|
||
if (k === 'v') { e.preventDefault(); pasteClipboard(); return; }
|
||
return;
|
||
}
|
||
|
||
switch (e.key) {
|
||
case 'Escape':
|
||
if (floating) { stampFloating(); }
|
||
else if (selection) { selection = null; updateSelReadout(); render(); }
|
||
else if (confirmDiscard()) close();
|
||
break;
|
||
case 'Enter': if (floating) stampFloating(); break;
|
||
case 'Delete': case 'Backspace': e.preventDefault(); deleteSelection(); break;
|
||
case 'b': case 'B': setTool('pencil'); break;
|
||
case 'e': case 'E': setTool('eraser'); break;
|
||
case 'i': case 'I': setTool('picker'); break;
|
||
case 'f': case 'F': setTool('fill'); break;
|
||
case 'l': case 'L': setTool('line'); break;
|
||
case 'r': case 'R': setTool('rect'); break;
|
||
case 'o': case 'O': setTool('ellipse'); break;
|
||
case 'm': case 'M': setTool('select'); break;
|
||
case 'g': case 'G': els.grid.checked = !els.grid.checked; showGrid = els.grid.checked; render(); break;
|
||
case '+': case '=': zoomAt(1.25, centerPoint()); break;
|
||
case '-': case '_': zoomAt(0.8, centerPoint()); break;
|
||
case '0': fitToScreen(); break;
|
||
case 'ArrowLeft': if (selOrFloat()) { e.preventDefault(); nudgeFloating(-1, 0); } break;
|
||
case 'ArrowRight': if (selOrFloat()) { e.preventDefault(); nudgeFloating(1, 0); } break;
|
||
case 'ArrowUp': if (selOrFloat()) { e.preventDefault(); nudgeFloating(0, -1); } break;
|
||
case 'ArrowDown': if (selOrFloat()) { e.preventDefault(); nudgeFloating(0, 1); } break;
|
||
case ' ':
|
||
if (!spaceDown) { spaceDown = true; updateCursor(); }
|
||
e.preventDefault();
|
||
break;
|
||
}
|
||
}
|
||
|
||
function selOrFloat() { return tool === 'select' && (selection || floating); }
|
||
|
||
function onKeyUp(e) {
|
||
if (!isOpen()) return;
|
||
if (e.key === ' ') { spaceDown = false; updateCursor(); }
|
||
}
|
||
|
||
// ===================================================================
|
||
// Helpers
|
||
// ===================================================================
|
||
function clamp(v, lo, hi) { return Math.max(lo, Math.min(hi, v)); }
|
||
|
||
function hexToRgb(hex) {
|
||
hex = hex.replace('#', '');
|
||
if (hex.length === 3) hex = hex.split('').map(c => c + c).join('');
|
||
const n = parseInt(hex, 16);
|
||
return { r: (n >> 16) & 255, g: (n >> 8) & 255, b: n & 255 };
|
||
}
|
||
|
||
function rgbToHex(r, g, b) {
|
||
return '#' + [r, g, b].map(v => v.toString(16).padStart(2, '0')).join('');
|
||
}
|
||
|
||
function toast(msg, isError) {
|
||
const el = document.getElementById('toast');
|
||
if (!el) return;
|
||
el.textContent = msg;
|
||
el.classList.remove('hidden', 'error');
|
||
if (isError) el.classList.add('error');
|
||
clearTimeout(el._timer);
|
||
el._timer = setTimeout(() => el.classList.add('hidden'), 3000);
|
||
}
|
||
|
||
// Expose public API
|
||
window.PixelEditor = { open, close };
|
||
})();
|