{ "id": "trimap-editor", "name": "Trimap Editor", "description": "Draw trimap masks for image matting: foreground, unknown, and background regions", "author": "hysts", "tags": [ "trimap", "image matting", "segmentation" ], "html_template": "
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\n Keyboard Shortcuts\n \n
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Layers
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FForeground layer
UUnknown layer
1Toggle foreground visibility
2Toggle unknown visibility
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Tools
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BBrush
EEraser
GFill (bucket)
PPan (toggle)
[ / ]Decrease / increase brush size
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View
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IToggle image
VView trimap
CCutout preview
NInvert cutout
MToggle maximize
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Navigation
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+ / -Zoom in / out
0Reset zoom (Fit button)
Space holdTemporary pan
Scroll wheelZoom at cursor
Right / middle dragPan
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Edit
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Ctrl+ZUndo
Ctrl+Shift+ZRedo
XRemove image
EscExit maximize
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\n", "css_template": "/* \u2500\u2500 Trimap Editor \u2014 all rules scoped under .trimap-editor \u2500\u2500 */\n\n.trimap-editor,\n.trimap-editor * {\n box-sizing: border-box;\n}\n\n.trimap-editor {\n font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, sans-serif;\n user-select: none;\n width: 100%;\n position: relative;\n display: flex;\n flex-direction: column;\n outline: none;\n background: var(--background-fill-primary, #fff);\n}\n\n/* \u2500\u2500 Maximized overlay \u2500\u2500 */\n\n/* te-maximized is set on the Gradio wrapper (outside morph scope)\n so the DOM diff cannot strip it and cause a layout flash.\n The & anchor targets the scoping element (#html-xxxxx) itself,\n so &.te-maximized matches when the wrapper has that class. */\n&.te-maximized .trimap-editor {\n position: fixed;\n top: 0;\n left: 0;\n width: 100vw;\n height: 100vh;\n z-index: 9999;\n background: var(--background-fill-primary, #fff);\n padding: 0;\n overflow: hidden;\n}\n\n&.te-maximized .trimap-editor .te-canvas-wrapper {\n flex: 1;\n min-height: 0;\n border-radius: 0;\n}\n\n&.te-maximized .trimap-editor .te-toolbar {\n flex-shrink: 0;\n border-radius: 0;\n border-left: none;\n border-right: none;\n}\n\n/* \u2500\u2500 Toolbar \u2500\u2500 */\n\n.trimap-editor .te-toolbar {\n display: flex;\n flex-direction: column;\n gap: 2px;\n padding: 6px 8px;\n background: var(--background-fill-secondary, #f7f7f7);\n border: 1px solid var(--border-color-primary, #e0e0e0);\n border-bottom: none;\n border-radius: 6px 6px 0 0;\n}\n\n.trimap-editor .te-toolbar-row {\n display: flex;\n flex-wrap: wrap;\n align-items: flex-start;\n gap: 4px;\n}\n\n.trimap-editor .te-group {\n display: flex;\n align-items: center;\n gap: 3px;\n}\n\n.trimap-editor .te-sep {\n width: 1px;\n height: 20px;\n background: var(--border-color-primary, #d0d0d0);\n margin: 0 2px;\n flex-shrink: 0;\n}\n\n.trimap-editor .te-spacer {\n flex: 1;\n width: auto;\n background: none;\n}\n\n.trimap-editor .te-label {\n font-size: 11px;\n color: var(--body-text-color-subdued, #888);\n white-space: nowrap;\n flex-shrink: 0;\n}\n\n/* \u2500\u2500 Toolbar Buttons \u2500\u2500 */\n\n.trimap-editor .te-btn {\n all: unset;\n display: inline-flex;\n align-items: center;\n justify-content: center;\n height: 26px;\n padding: 0 10px;\n border-radius: 4px;\n font-size: 12px;\n font-weight: 500;\n cursor: pointer;\n color: var(--body-text-color, #333);\n background: var(--background-fill-primary, #fff);\n border: 1px solid var(--border-color-primary, #d0d0d0);\n transition: background 0.15s, border-color 0.15s;\n white-space: nowrap;\n flex-shrink: 0;\n}\n\n.trimap-editor .te-btn:hover {\n background: var(--background-fill-secondary, #f0f0f0);\n}\n\n.trimap-editor .te-btn.active {\n background: var(--color-accent, #2196F3);\n border-color: var(--color-accent, #2196F3);\n color: #fff;\n}\n\n.trimap-editor .te-btn-icon {\n padding: 0 8px;\n font-size: 14px;\n}\n\n.trimap-editor .te-btn-danger {\n color: #c0392b;\n border-color: #e8a9a3;\n}\n\n.trimap-editor .te-btn-danger:hover {\n background: #fdecea;\n border-color: #c0392b;\n}\n\n.trimap-editor .te-btn-danger-confirm {\n background: #c0392b;\n color: #fff;\n border-color: #c0392b;\n}\n\n.trimap-editor .te-btn-danger-confirm:hover {\n background: #a93226;\n border-color: #a93226;\n}\n\n.trimap-editor .te-btn-primary {\n background: var(--color-accent, #2196F3);\n border-color: var(--color-accent, #2196F3);\n color: #fff;\n}\n\n.trimap-editor .te-btn-primary:hover {\n opacity: 0.85;\n}\n\n.trimap-editor .te-btn:disabled {\n opacity: 0.45;\n cursor: not-allowed;\n pointer-events: none;\n}\n\n/* \u2500\u2500 Grouped panels \u2500\u2500 */\n\n.trimap-editor .te-panel {\n display: grid;\n align-items: center;\n row-gap: 3px;\n column-gap: 6px;\n padding: 5px 8px;\n background: var(--background-fill-primary, #fff);\n border: 1px solid var(--border-color-primary, #d0d0d0);\n border-radius: 5px;\n flex-shrink: 0;\n}\n\n/* layer panel: btn | eye | swatch | slider | val */\n.trimap-editor .te-layer-panel {\n grid-template-columns: max-content max-content max-content 80px max-content;\n}\n\n/* tool panel: btn | slider | val */\n.trimap-editor .te-tool-panel {\n grid-template-columns: max-content 80px max-content;\n}\n\n/* Bucket (fill) button spans the full tool-panel row */\n.trimap-editor .te-tool-panel [data-tool=\"bucket\"] {\n grid-column: 1 / -1;\n}\n\n/* Align panel buttons to the left so text doesn't jump */\n.trimap-editor .te-panel .te-btn {\n justify-content: flex-start;\n}\n\n/* \u2500\u2500 Slider \u2500\u2500 */\n\n.trimap-editor .te-size-group,\n.trimap-editor .te-alpha-group {\n display: flex;\n align-items: center;\n gap: 5px;\n}\n\n.trimap-editor .te-size-val,\n.trimap-editor .te-alpha-val {\n font-size: 11px;\n color: var(--body-text-color-subdued, #888);\n min-width: 28px;\n text-align: right;\n flex-shrink: 0;\n}\n\n.trimap-editor .te-slider {\n -webkit-appearance: none;\n appearance: none;\n width: 80px;\n height: 4px;\n margin: 0;\n padding: 0;\n background: transparent;\n flex-shrink: 0;\n}\n\n.trimap-editor .te-slider::-webkit-slider-thumb {\n -webkit-appearance: none;\n appearance: none;\n width: 13px;\n height: 13px;\n border-radius: 50%;\n background: var(--color-accent, #2196F3);\n cursor: pointer;\n margin-top: -4.5px;\n}\n\n.trimap-editor .te-slider::-webkit-slider-runnable-track {\n height: 4px;\n border-radius: 2px;\n background: var(--border-color-primary, #d0d0d0);\n}\n\n.trimap-editor .te-slider::-moz-range-thumb {\n width: 13px;\n height: 13px;\n border-radius: 50%;\n background: var(--color-accent, #2196F3);\n cursor: pointer;\n border: none;\n}\n\n.trimap-editor .te-slider::-moz-range-track {\n height: 4px;\n border-radius: 2px;\n background: var(--border-color-primary, #d0d0d0);\n}\n\n/* \u2500\u2500 Canvas wrapper \u2500\u2500 */\n\n.trimap-editor .te-canvas-wrapper {\n position: relative;\n width: 100%;\n min-height: 200px;\n height: 500px;\n background: #1a1a1a;\n border: 1px solid var(--border-color-primary, #e0e0e0);\n border-radius: 0 0 6px 6px;\n overflow: hidden;\n display: flex;\n align-items: center;\n justify-content: center;\n}\n\n&.te-maximized .trimap-editor .te-canvas-wrapper {\n height: auto;\n}\n\n.trimap-editor .te-canvas {\n display: block;\n cursor: default;\n /* canvas dimensions set by JS; cursor set dynamically */\n}\n\n/* Hide canvas when no image loaded */\n.trimap-editor .te-canvas-wrapper:not(.te-has-image) .te-canvas {\n display: none;\n}\n\n/* \u2500\u2500 Remove image button (top-right overlay) \u2500\u2500 */\n\n.trimap-editor .te-remove-btn {\n all: unset;\n display: none;\n position: absolute;\n top: 6px;\n right: 6px;\n z-index: 3;\n width: 24px;\n height: 24px;\n border-radius: 50%;\n background: rgba(0, 0, 0, 0.55);\n color: #fff;\n font-size: 13px;\n line-height: 24px;\n text-align: center;\n cursor: pointer;\n transition: background 0.15s;\n}\n\n.trimap-editor .te-remove-btn:hover {\n background: rgba(192, 57, 43, 0.85);\n}\n\n.trimap-editor .te-canvas-wrapper.te-has-image .te-remove-btn {\n display: block;\n}\n\n/* \u2500\u2500 Upload hint \u2500\u2500 */\n\n.trimap-editor .te-upload-hint {\n position: absolute;\n inset: 0;\n display: flex;\n align-items: center;\n justify-content: center;\n z-index: 2;\n pointer-events: none;\n}\n\n/* Hide upload hint when image is loaded */\n.trimap-editor .te-canvas-wrapper.te-has-image .te-upload-hint {\n display: none;\n}\n\n.trimap-editor .te-file-input {\n position: absolute;\n width: 100%;\n height: 100%;\n opacity: 0;\n cursor: pointer;\n pointer-events: all;\n top: 0;\n left: 0;\n}\n\n/* Hide file input when image loaded (canvas handles drag/click) */\n.trimap-editor .te-canvas-wrapper.te-has-image .te-file-input {\n display: none;\n}\n\n.trimap-editor .te-upload-label {\n display: flex;\n flex-direction: column;\n align-items: center;\n gap: 10px;\n color: var(--body-text-color-subdued, #888);\n cursor: pointer;\n pointer-events: none;\n}\n\n.trimap-editor .te-upload-icon {\n font-size: 36px;\n opacity: 0.6;\n}\n\n.trimap-editor .te-upload-text {\n font-size: 13px;\n}\n\n/* \u2500\u2500 Color swatch + palette \u2500\u2500 */\n\n.trimap-editor .te-color-swatch {\n display: inline-block;\n width: 16px;\n height: 16px;\n border-radius: 3px;\n border: 2px solid var(--border-color-primary, #d0d0d0);\n cursor: pointer;\n flex-shrink: 0;\n transition: border-color 0.15s;\n}\n\n/* Default swatch colors \u2014 set via CSS (not inline style) so DOM morph\n resets to a sane default. syncUIState() overwrites from JS state. */\n.trimap-editor #te-fg-color { background: #00c853; }\n.trimap-editor #te-unknown-color { background: #2196F3; }\n\n.trimap-editor .te-color-swatch:hover {\n border-color: var(--body-text-color, #333);\n}\n\n.trimap-editor .te-color-palette {\n position: absolute;\n z-index: 100;\n background: var(--background-fill-primary, #fff);\n border: 1px solid var(--border-color-primary, #d0d0d0);\n border-radius: 6px;\n padding: 6px;\n display: none;\n grid-template-columns: repeat(5, 1fr);\n gap: 4px;\n box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);\n}\n\n.trimap-editor .te-color-palette.te-visible {\n display: grid;\n}\n\n.trimap-editor .te-palette-item {\n display: block;\n width: 22px;\n height: 22px;\n border-radius: 4px;\n border: 2px solid transparent;\n cursor: pointer;\n transition: border-color 0.12s, transform 0.12s;\n}\n\n.trimap-editor .te-palette-item:hover {\n border-color: var(--body-text-color, #333);\n transform: scale(1.15);\n}\n\n.trimap-editor .te-palette-item.te-selected {\n border-color: var(--color-accent, #2196F3);\n}\n\n/* White swatch needs visible border */\n.trimap-editor .te-palette-item[data-color=\"#ffffff\"] {\n border-color: var(--border-color-primary, #d0d0d0);\n}\n\n.trimap-editor .te-palette-item[data-color=\"#ffffff\"]:hover {\n border-color: var(--body-text-color, #333);\n}\n\n.trimap-editor .te-palette-item[data-color=\"#ffffff\"].te-selected {\n border-color: var(--color-accent, #2196F3);\n}\n\n/* \u2500\u2500 Visibility toggle (eye icon) \u2500\u2500 */\n\n.trimap-editor .te-vis-btn {\n display: inline-flex;\n align-items: center;\n justify-content: center;\n width: 18px;\n height: 18px;\n border-radius: 50%;\n cursor: pointer;\n color: var(--body-text-color-subdued, #888);\n flex-shrink: 0;\n}\n\n.trimap-editor .te-vis-btn:hover {\n color: var(--body-text-color, #333);\n}\n\n.trimap-editor .te-vis-btn svg {\n display: block;\n}\n\n/* Show open eye by default, hide slash eye */\n.trimap-editor .te-vis-btn .te-eye-off {\n display: none;\n}\n\n/* When hidden: show slash eye, hide open eye */\n.trimap-editor .te-vis-btn.te-vis-off .te-eye-open {\n display: none;\n}\n\n.trimap-editor .te-vis-btn.te-vis-off .te-eye-off {\n display: block;\n}\n\n.trimap-editor .te-vis-btn.te-vis-off {\n opacity: 0.45;\n}\n\n/* \u2500\u2500 Toggle button (Image) \u2500\u2500 */\n\n.trimap-editor .te-toggle-btn.active {\n background: var(--color-accent, #2196F3);\n border-color: var(--color-accent, #2196F3);\n color: #fff;\n}\n\n/* \u2500\u2500 Processing lock \u2500\u2500 */\n\n.trimap-editor.te-processing .te-canvas-wrapper {\n cursor: wait;\n}\n\n.trimap-editor.te-processing .te-canvas {\n pointer-events: none;\n}\n\n.trimap-editor.te-processing .te-toolbar {\n pointer-events: none;\n opacity: 0.7;\n}\n\n/* \u2500\u2500 Help Overlay \u2500\u2500 */\n\n.trimap-editor .te-help-btn {\n font-weight: 700;\n font-size: 13px;\n}\n\n.trimap-editor .te-help-overlay {\n display: none;\n position: absolute;\n top: 0;\n left: 0;\n width: 100%;\n height: 100%;\n background: rgba(0, 0, 0, 0.4);\n z-index: 10000;\n justify-content: center;\n align-items: center;\n}\n\n&.te-maximized .trimap-editor .te-help-overlay {\n position: fixed;\n}\n\n.trimap-editor .te-help-overlay.te-visible {\n display: flex;\n}\n\n.trimap-editor .te-help-dialog {\n background: var(--background-fill-primary, #fff);\n border: 1px solid var(--border-color-primary, #e0e0e0);\n border-radius: 8px;\n padding: 16px 20px;\n max-width: 420px;\n width: 90%;\n box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);\n max-height: 80vh;\n overflow-y: auto;\n}\n\n.trimap-editor .te-help-header {\n display: flex;\n align-items: center;\n justify-content: space-between;\n margin-bottom: 12px;\n font-size: 14px;\n font-weight: 600;\n color: var(--body-text-color, #333);\n}\n\n.trimap-editor .te-help-close-btn {\n all: unset;\n cursor: pointer;\n font-size: 18px;\n line-height: 1;\n color: var(--body-text-color-subdued, #888);\n padding: 0 4px;\n}\n\n.trimap-editor .te-help-close-btn:hover {\n color: var(--body-text-color, #333);\n}\n\n.trimap-editor .te-help-section {\n font-size: 11px;\n font-weight: 600;\n color: var(--body-text-color-subdued, #888);\n text-transform: uppercase;\n letter-spacing: 0.05em;\n padding: 8px 0 4px;\n border-bottom: 1px solid var(--border-color-primary, #e0e0e0);\n margin-bottom: 2px;\n}\n\n.trimap-editor .te-help-section:first-of-type {\n padding-top: 0;\n}\n\n.trimap-editor .te-help-table {\n width: 100%;\n border-collapse: collapse;\n font-size: 12px;\n color: var(--body-text-color, #333);\n}\n\n.trimap-editor .te-help-table td {\n padding: 3px 0;\n}\n\n.trimap-editor .te-help-table td:first-child {\n white-space: nowrap;\n padding-right: 16px;\n}\n\n.trimap-editor .te-help-table kbd {\n display: inline-block;\n background: var(--background-fill-secondary, #f3f3f3);\n border: 1px solid var(--border-color-primary, #d0d0d0);\n border-radius: 3px;\n padding: 1px 5px;\n font-family: ui-monospace, SFMono-Regular, \"SF Mono\", Menlo, monospace;\n font-size: 11px;\n line-height: 1.4;\n}\n\n/* \u2500\u2500 Zoom badge drawn on canvas by JS \u2014 no CSS needed \u2500\u2500 */\n", "js_on_load": "(function () {\n \"use strict\";\n\n // \u2500\u2500 Constants \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n var MIN_ZOOM = 0.05;\n var MAX_ZOOM = 20;\n var ZOOM_SENSITIVITY = 0.001;\n var MAX_HISTORY = 30;\n var DEFAULT_UNKNOWN_COLOR = \"#2196F3\";\n var DEFAULT_FG_COLOR = \"#00c853\";\n\n // \u2500\u2500 DOM refs \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n var container = element.querySelector(\".trimap-editor\");\n var dataScript = element.querySelector(\"script.te-data\");\n var canvas = element.querySelector(\".te-canvas\");\n var canvasWrapper = element.querySelector(\".te-canvas-wrapper\");\n var fileInput = element.querySelector(\"#te-file-input\");\n\n var brushSizeSlider = element.querySelector(\"#te-brush-size\");\n var brushSizeVal = element.querySelector(\"#te-brush-size-val\");\n var eraserSizeSlider = element.querySelector(\"#te-eraser-size\");\n var eraserSizeVal = element.querySelector(\"#te-eraser-size-val\");\n var fgAlphaSlider = element.querySelector(\"#te-fg-alpha\");\n var unknownAlphaSlider = element.querySelector(\"#te-unknown-alpha\");\n // Fg group is first in DOM, Unknown second\n var fgAlphaVal = element.querySelector(\"#te-fg-alpha-val\");\n var unknownAlphaVal = element.querySelector(\"#te-unknown-alpha-val\");\n\n var unknownColorSwatch = element.querySelector(\"#te-unknown-color\");\n var fgColorSwatch = element.querySelector(\"#te-fg-color\");\n var colorPalette = element.querySelector(\"#te-color-palette\");\n\n var fgVisBtn = element.querySelector(\"#te-fg-vis\");\n var unknownVisBtn = element.querySelector(\"#te-unknown-vis\");\n\n var undoBtn = element.querySelector(\"#te-undo-btn\");\n var redoBtn = element.querySelector(\"#te-redo-btn\");\n var removeBtn = element.querySelector(\"#te-remove-btn\");\n var imageToggleBtn = element.querySelector(\"#te-image-toggle\");\n var clearBtn = element.querySelector(\"#te-clear-btn\");\n var viewTrimapBtn = element.querySelector(\"#te-view-trimap-btn\");\n var viewCutoutBtn = element.querySelector(\"#te-view-cutout-btn\");\n var cutoutInvertBtn = element.querySelector(\"#te-cutout-invert-btn\");\n var fitBtn = element.querySelector(\"#te-fit-btn\");\n var maximizeBtn = element.querySelector(\"#te-maximize-btn\");\n var helpBtn = element.querySelector(\".te-help-btn\");\n var helpOverlay = element.querySelector(\".te-help-overlay\");\n var helpCloseBtn = element.querySelector(\".te-help-close-btn\");\n\n var ctx = canvas.getContext(\"2d\");\n\n // \u2500\u2500 Off-screen mask canvases (natural image size) \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n var unknownCanvas = document.createElement(\"canvas\");\n var unknownCtx = unknownCanvas.getContext(\"2d\");\n var fgCanvas = document.createElement(\"canvas\");\n var fgCtx = fgCanvas.getContext(\"2d\");\n\n // Temp canvas for colored overlay compositing\n var tCanvas = document.createElement(\"canvas\");\n var tCtx = tCanvas.getContext(\"2d\");\n\n // Trimap view canvas: composited grayscale (0/128/255), updated on stroke end\n var trimapViewCanvas = document.createElement(\"canvas\");\n var trimapViewCtx = trimapViewCanvas.getContext(\"2d\");\n\n // Checkerboard pattern for cutout preview (16x16 tile)\n var checkerCanvas = document.createElement(\"canvas\");\n checkerCanvas.width = 16; checkerCanvas.height = 16;\n var ckCtx = checkerCanvas.getContext(\"2d\");\n ckCtx.fillStyle = \"#ccc\"; ckCtx.fillRect(0, 0, 16, 16);\n ckCtx.fillStyle = \"#999\"; ckCtx.fillRect(0, 0, 8, 8);\n ckCtx.fillStyle = \"#999\"; ckCtx.fillRect(8, 8, 8, 8);\n\n // \u2500\u2500 State \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n var state = {\n image: null, // HTMLImageElement\n imageUrl: null, // Python-provided URL (/gradio_api/file=...)\n objectUrl: null, // blob URL (user-uploaded)\n fileUrl: null, // public URL from upload()\n imageSource: null, // \"upload\" | \"python\"\n pendingCommit: false, // commit queued while image upload in-flight\n\n layer: \"foreground\", // \"foreground\" | \"unknown\"\n tool: \"brush\", // \"brush\" | \"eraser\" | \"bucket\" | \"pan\"\n prevDrawTool: \"brush\", // last non-pan tool (for pan toggle)\n brushSizeBrush: 20,\n brushSizeEraser: 10,\n unknownAlpha: 0.60,\n fgAlpha: 0.60,\n unknownColor: DEFAULT_UNKNOWN_COLOR,\n fgColor: DEFAULT_FG_COLOR,\n savedFgAlpha: 0.60, // remembered alpha when visibility toggled off\n savedUnknownAlpha: 0.60,\n\n zoom: 1,\n panX: 0,\n panY: 0,\n isPanning: false,\n spaceHeld: false,\n panStartX: 0,\n panStartY: 0,\n panStartPanX: 0,\n panStartPanY: 0,\n\n isDrawing: false,\n pendingDot: null, // deferred initial dot {x, y}\n pendingDotTimer: null, // setTimeout id for deferred dot\n lastIX: 0,\n lastIY: 0,\n mouseInsideCanvas: false,\n cursorOverImage: false,\n cursorX: -1,\n cursorY: -1,\n\n showImage: true,\n showTrimap: false, // trimap view mode\n showCutout: false, // cutout preview mode\n cutoutInvert: false, // invert cutout (show outside of mask)\n maximized: false,\n\n history: [], // [{unknown: ImageData, fg: ImageData}]\n historyIndex: -1,\n };\n\n // \u2500\u2500 Resize Observer \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n var resizeObserver = new ResizeObserver(function () {\n resizeCanvas();\n if (state.image) {\n clampPan();\n render();\n }\n });\n resizeObserver.observe(canvasWrapper);\n\n // \u2500\u2500 MutationObserver: value updates from Python \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n var dataObserver = new MutationObserver(handleValue);\n dataObserver.observe(dataScript, { childList: true, characterData: true, subtree: true });\n\n // \u2500\u2500 MutationObserver: re-assert CSS classes wiped by DOM diff \u2500\u2500\u2500\n var containerObserver = new MutationObserver(function () {\n // Re-assert te-has-image on canvasWrapper\n var shouldHaveImage = state.image !== null;\n if (shouldHaveImage !== canvasWrapper.classList.contains(\"te-has-image\")) {\n canvasWrapper.classList.toggle(\"te-has-image\", shouldHaveImage);\n }\n });\n containerObserver.observe(container, { attributes: true, attributeFilter: [\"class\"] });\n containerObserver.observe(canvasWrapper, { attributes: true, attributeFilter: [\"class\"] });\n\n // Expose state and canvases on the container element for UI tests (read-only references).\n container._teState = state;\n container._teUnknownCanvas = unknownCanvas;\n container._teFgCanvas = fgCanvas;\n\n // Handle initial value\n handleValue();\n\n // \u2500\u2500 Value handler \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n // Re-assert all dynamic CSS class states onto toolbar elements after a\n // DOM morph. Gradio's DOM diff resets every element's class attribute\n // back to the template defaults, so we must re-apply JS state here.\n function syncUIState() {\n // Re-assert button active classes (morph resets to template defaults)\n element.querySelectorAll(\"[data-layer]\").forEach(function (b) {\n b.classList.toggle(\"active\", b.getAttribute(\"data-layer\") === state.layer);\n });\n var activeTool = state.spaceHeld ? \"pan\" : state.tool;\n element.querySelectorAll(\"[data-tool]\").forEach(function (b) {\n b.classList.toggle(\"active\", b.getAttribute(\"data-tool\") === activeTool);\n });\n imageToggleBtn.classList.toggle(\"active\", state.showImage);\n viewTrimapBtn.classList.toggle(\"active\", state.showTrimap);\n viewCutoutBtn.classList.toggle(\"active\", state.showCutout);\n cutoutInvertBtn.classList.toggle(\"active\", state.cutoutInvert);\n cutoutInvertBtn.disabled = !state.showCutout;\n fgVisBtn.classList.toggle(\"te-vis-off\", state.fgAlpha <= 0);\n unknownVisBtn.classList.toggle(\"te-vis-off\", state.unknownAlpha <= 0);\n\n // Re-assert slider values and labels (morph resets to template defaults)\n brushSizeSlider.value = state.brushSizeBrush;\n brushSizeVal.textContent = state.brushSizeBrush;\n eraserSizeSlider.value = state.brushSizeEraser;\n eraserSizeVal.textContent = state.brushSizeEraser;\n var fgPct = Math.round(state.fgAlpha * 100);\n fgAlphaSlider.value = fgPct;\n fgAlphaVal.textContent = fgPct + \"%\";\n var unPct = Math.round(state.unknownAlpha * 100);\n unknownAlphaSlider.value = unPct;\n unknownAlphaVal.textContent = unPct + \"%\";\n\n // Re-assert color swatch backgrounds (morph resets inline styles)\n fgColorSwatch.style.background = state.fgColor;\n unknownColorSwatch.style.background = state.unknownColor;\n\n // Re-assert undo/redo disabled state (morph resets to template default)\n updateHistoryButtons();\n\n // Re-assert cursor (morph resets inline styles on canvas)\n updateCursor();\n }\n\n function handleValue() {\n // Re-assert te-has-image which Gradio's DOM morph may have stripped.\n // (te-maximized lives on the Gradio wrapper, outside the morph scope.)\n canvasWrapper.classList.toggle(\"te-has-image\", state.image !== null);\n\n var raw = dataScript.textContent.trim();\n\n if (!raw || raw === \"null\") {\n // DOM may have been morphed \u2014 re-assert canvas and UI state\n if (state.image) {\n resizeCanvas();\n clampPan();\n render();\n }\n syncUIState();\n return;\n }\n\n var data;\n try {\n data = JSON.parse(raw);\n } catch (e) {\n return;\n }\n\n // Our own committed value echoing back \u2014 don't reload image\n if (\"trimapBase64\" in data) {\n resizeCanvas();\n clampPan();\n render();\n syncUIState();\n return;\n }\n\n // Input from Python (postprocess): {image, width, height}\n if (\"image\" in data) {\n // Clean up any previous user-upload state\n if (state.objectUrl) {\n URL.revokeObjectURL(state.objectUrl);\n state.objectUrl = null;\n }\n state.pendingCommit = false;\n\n var imageUrl = data.image;\n // Store the stripped path for commitValue(); img.src uses\n // the local imageUrl variable which still has the full URL.\n var marker = \"/gradio_api/file=\";\n var mIdx = imageUrl.indexOf(marker);\n state.imageUrl = mIdx !== -1\n ? imageUrl.substring(mIdx + marker.length) : imageUrl;\n state.imageSource = \"python\";\n state.fileUrl = null;\n\n var trimapUrl = data.trimap || null;\n\n var img = new Image();\n img.onload = function () {\n // Set up canvas and compute zoom BEFORE setting state.image so\n // that any ResizeObserver render triggered by canvasWrapper layout\n // queries finds state.image=null and skips rendering, preventing\n // a brief zoom=1 flash before the first correct render.\n initMaskCanvases(img.naturalWidth, img.naturalHeight);\n clearHistory();\n canvasWrapper.classList.add(\"te-has-image\");\n resizeCanvas();\n var iw = img.naturalWidth;\n var ih = img.naturalHeight;\n var cw = canvas.width;\n var ch = canvas.height;\n var z = Math.min(cw / iw, ch / ih);\n state.zoom = z;\n state.panX = (cw - iw * z) / 2;\n state.panY = (ch - ih * z) / 2;\n\n // Set state.image now \u2014 zoom/pan are ready, and the\n // MutationObserver needs state.image !== null to re-assert\n // the te-has-image class if a DOM morph fires while we're\n // still loading the trimap asynchronously.\n state.image = img;\n\n // Notify Python that a new image arrived (e.g. for resize\n // checks). Only .input() handlers fire \u2014 commitValue() after\n // strokes does NOT call trigger(\"input\"), so drawing never\n // causes a round-trip.\n trigger(\"input\");\n\n if (trimapUrl) {\n // Show image immediately (blank mask), then overlay trimap\n render();\n var trimapImg = new Image();\n trimapImg.onload = function () {\n parseTrimapIntoCanvases(trimapImg, iw, ih);\n updateTrimapView();\n snapshotHistory();\n render();\n // Re-commit so Python sees stripped path + trimapBase64\n commitValue();\n };\n trimapImg.onerror = function () {\n // Trimap failed to load \u2014 proceed without it\n snapshotHistory();\n };\n trimapImg.src = trimapUrl;\n } else {\n snapshotHistory();\n render();\n }\n };\n img.onerror = function () {\n // Silently ignore load errors\n };\n img.src = imageUrl;\n }\n }\n\n // \u2500\u2500 Mask canvas init \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n function initMaskCanvases(w, h) {\n unknownCanvas.width = w;\n unknownCanvas.height = h;\n fgCanvas.width = w;\n fgCanvas.height = h;\n tCanvas.width = w;\n tCanvas.height = h;\n trimapViewCanvas.width = w;\n trimapViewCanvas.height = h;\n unknownCtx.clearRect(0, 0, w, h);\n fgCtx.clearRect(0, 0, w, h);\n }\n\n // Parse a trimap image (0/128/255 grayscale) into unknownCanvas and fgCanvas.\n // Uses generous thresholds (>200 for fg, >64 for unknown) to tolerate slight\n // value shifts from image format conversions.\n function parseTrimapIntoCanvases(trimapImg, w, h) {\n tCanvas.width = w;\n tCanvas.height = h;\n var tc = tCanvas.getContext(\"2d\");\n tc.drawImage(trimapImg, 0, 0, w, h);\n var trimapData = tc.getImageData(0, 0, w, h).data;\n\n var unknownImgData = unknownCtx.createImageData(w, h);\n var fgImgData = fgCtx.createImageData(w, h);\n var ud = unknownImgData.data;\n var fd = fgImgData.data;\n\n for (var i = 0; i < w * h; i++) {\n var px = i * 4;\n var val = trimapData[px]; // R channel (grayscale: R==G==B)\n if (val > 200) {\n // Foreground (255): paint both canvases\n ud[px] = fd[px] = 255;\n ud[px + 1] = fd[px + 1] = 255;\n ud[px + 2] = fd[px + 2] = 255;\n ud[px + 3] = fd[px + 3] = 255;\n } else if (val > 64) {\n // Unknown (128): paint only unknown canvas\n ud[px] = ud[px + 1] = ud[px + 2] = ud[px + 3] = 255;\n }\n // else: background (0) \u2014 both stay at 0 (default)\n }\n\n unknownCtx.putImageData(unknownImgData, 0, 0);\n fgCtx.putImageData(fgImgData, 0, 0);\n }\n\n // \u2500\u2500 Canvas resize \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n // Canvas always fills the wrapper; zoom/pan handle image fitting.\n\n function resizeCanvas() {\n var w = Math.round(canvasWrapper.clientWidth || 800);\n var h = Math.round(canvasWrapper.clientHeight || 500);\n // Skip if dimensions unchanged \u2014 setting canvas.width/height clears\n // the canvas content per HTML5 spec, causing visible flicker during\n // the echo cycle (commitValue \u2192 DOM morph \u2192 handleValue \u2192 resize).\n if (canvas.width === w && canvas.height === h) return;\n canvas.width = w;\n canvas.height = h;\n }\n\n // \u2500\u2500 Zoom helpers \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n function minZoom() {\n if (!state.image) return MIN_ZOOM;\n var cw = canvas.width || 1;\n var ch = canvas.height || 1;\n return Math.min(cw / state.image.naturalWidth, ch / state.image.naturalHeight);\n }\n\n function resetZoom() {\n if (!state.image) return;\n var iw = state.image.naturalWidth;\n var ih = state.image.naturalHeight;\n var cw = canvas.width;\n var ch = canvas.height;\n // Contain fit: scale image to fit entirely within canvas\n var zoom = Math.min(cw / iw, ch / ih);\n state.zoom = zoom;\n // Center the image\n state.panX = (cw - iw * zoom) / 2;\n state.panY = (ch - ih * zoom) / 2;\n render();\n }\n\n function clampPan() {\n if (!state.image) return;\n var imgW = state.image.naturalWidth * state.zoom;\n var imgH = state.image.naturalHeight * state.zoom;\n var cw = canvas.width;\n var ch = canvas.height;\n\n // Any image point can reach canvas center (half-screen overscroll).\n // Works for both zoomed-in (imgW > cw) and zoomed-out (imgW <= cw).\n var maxPanX = cw / 2;\n var minPanX = cw / 2 - imgW;\n if (state.panX > maxPanX) state.panX = maxPanX;\n if (state.panX < minPanX) state.panX = minPanX;\n\n var maxPanY = ch / 2;\n var minPanY = ch / 2 - imgH;\n if (state.panY > maxPanY) state.panY = maxPanY;\n if (state.panY < minPanY) state.panY = minPanY;\n }\n\n function zoomToCenter(newZoom) {\n newZoom = Math.max(minZoom(), Math.min(MAX_ZOOM, newZoom));\n var cx = canvas.width / 2;\n var cy = canvas.height / 2;\n state.panX = cx - (cx - state.panX) * (newZoom / state.zoom);\n state.panY = cy - (cy - state.panY) * (newZoom / state.zoom);\n state.zoom = newZoom;\n clampPan();\n render();\n }\n\n // \u2500\u2500 Coordinate conversion \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n function clientToImage(clientX, clientY) {\n var rect = canvas.getBoundingClientRect();\n var cssX = clientX - rect.left;\n var cssY = clientY - rect.top;\n // account for CSS vs pixel dimensions\n var scaleX = canvas.width / rect.width;\n var scaleY = canvas.height / rect.height;\n var canvasX = cssX * scaleX;\n var canvasY = cssY * scaleY;\n // canvas = pan + zoom * image\n return {\n x: (canvasX - state.panX) / state.zoom,\n y: (canvasY - state.panY) / state.zoom,\n };\n }\n\n // \u2500\u2500 Rendering \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n var _rafId = null;\n function requestRender() {\n if (_rafId) return;\n _rafId = requestAnimationFrame(function () {\n _rafId = null;\n render();\n });\n }\n\n function render() {\n if (!state.image) return;\n\n ctx.setTransform(1, 0, 0, 1, 0, 0);\n ctx.clearRect(0, 0, canvas.width, canvas.height);\n\n // Dark background\n ctx.fillStyle = \"#1a1a1a\";\n ctx.fillRect(0, 0, canvas.width, canvas.height);\n\n var iw = state.image.naturalWidth;\n var ih = state.image.naturalHeight;\n\n // Apply zoom + pan\n ctx.setTransform(state.zoom, 0, 0, state.zoom, state.panX, state.panY);\n\n if (state.showTrimap) {\n // Trimap view: draw grayscale trimap (0/128/255)\n ctx.imageSmoothingEnabled = false;\n ctx.drawImage(trimapViewCanvas, 0, 0, iw, ih);\n } else if (state.showCutout) {\n // Cutout preview: active layer mask on checkerboard\n // Mask canvas: fg or unknown depending on active layer\n var maskSrc = state.layer === \"foreground\" ? fgCanvas : unknownCanvas;\n\n // 1. Fill image area with checkerboard\n var checkerPattern = ctx.createPattern(checkerCanvas, \"repeat\");\n ctx.fillStyle = checkerPattern;\n ctx.fillRect(0, 0, iw, ih);\n ctx.imageSmoothingEnabled = false;\n\n // 2. Image masked by the active layer (or its inverse)\n tCtx.clearRect(0, 0, iw, ih);\n tCtx.globalCompositeOperation = \"source-over\";\n tCtx.drawImage(state.image, 0, 0);\n if (state.cutoutInvert) {\n // Invert: remove mask region, keep outside\n tCtx.globalCompositeOperation = \"destination-out\";\n } else {\n // Normal: keep only mask region\n tCtx.globalCompositeOperation = \"destination-in\";\n }\n tCtx.drawImage(maskSrc, 0, 0);\n tCtx.globalCompositeOperation = \"source-over\";\n ctx.drawImage(tCanvas, 0, 0, iw, ih);\n } else {\n // Normal view: image + colored overlays\n if (state.showImage) {\n ctx.imageSmoothingEnabled = true;\n ctx.drawImage(state.image, 0, 0, iw, ih);\n }\n\n ctx.imageSmoothingEnabled = false;\n // 2. Draw unknown overlay\n drawMaskOverlay(unknownCanvas, unknownCtx, state.unknownColor, state.unknownAlpha);\n // 3. Draw foreground overlay (on top)\n drawMaskOverlay(fgCanvas, fgCtx, state.fgColor, state.fgAlpha);\n }\n\n // Back to screen space for UI elements\n ctx.setTransform(1, 0, 0, 1, 0, 0);\n\n // 4. Zoom badge\n var zoomText = Math.round(state.zoom * 100) + \"%\";\n ctx.font = \"bold 12px -apple-system, BlinkMacSystemFont, sans-serif\";\n var tm = ctx.measureText(zoomText);\n var px = canvas.width - tm.width - 16;\n var py = canvas.height - 24;\n ctx.fillStyle = \"rgba(0,0,0,0.55)\";\n ctx.beginPath();\n ctx.roundRect(px - 5, py - 2, tm.width + 10, 18, 3);\n ctx.fill();\n ctx.fillStyle = \"#fff\";\n ctx.textBaseline = \"top\";\n ctx.fillText(zoomText, px, py + 1);\n\n // 5. Cursor circle (skip if outside image, pan mode, or bucket tool)\n var inPanMode = state.isPanning || state.spaceHeld || state.tool === \"pan\";\n if (state.mouseInsideCanvas && state.cursorOverImage && state.cursorX >= 0 && !inPanMode && state.tool !== \"bucket\") {\n drawCursor(state.cursorX, state.cursorY);\n }\n }\n\n function drawMaskOverlay(maskCanvas, maskCtxArg, colorHex, alpha) {\n if (alpha <= 0) return;\n var iw = maskCanvas.width;\n var ih = maskCanvas.height;\n // Composite: mask \u2192 color, then draw with alpha\n tCtx.clearRect(0, 0, iw, ih);\n tCtx.drawImage(maskCanvas, 0, 0);\n tCtx.globalCompositeOperation = \"source-in\";\n tCtx.fillStyle = colorHex;\n tCtx.fillRect(0, 0, iw, ih);\n tCtx.globalCompositeOperation = \"source-over\";\n\n ctx.globalAlpha = alpha;\n ctx.drawImage(tCanvas, 0, 0, iw, ih);\n ctx.globalAlpha = 1;\n }\n\n function drawCursor(canvasX, canvasY) {\n var r = getBrushSize();\n ctx.save();\n ctx.setLineDash([3, 3]);\n ctx.lineWidth = 1.5;\n ctx.strokeStyle = state.tool === \"eraser\" ? \"rgba(255,60,60,0.9)\" : \"rgba(255,255,255,0.9)\";\n ctx.beginPath();\n ctx.arc(canvasX, canvasY, Math.max(1, r), 0, Math.PI * 2);\n ctx.stroke();\n ctx.setLineDash([]);\n ctx.restore();\n }\n\n // \u2500\u2500 Drawing \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n function paintAt(ix, iy) {\n var r = getBrushSize() / state.zoom;\n if (state.tool === \"brush\") {\n if (state.layer === \"unknown\") {\n unknownCtx.globalCompositeOperation = \"source-over\";\n unknownCtx.fillStyle = \"rgba(255,255,255,1)\";\n unknownCtx.beginPath();\n unknownCtx.arc(ix, iy, r, 0, Math.PI * 2);\n unknownCtx.fill();\n } else {\n // Foreground: paint both fg AND unknown\n fgCtx.globalCompositeOperation = \"source-over\";\n fgCtx.fillStyle = \"rgba(255,255,255,1)\";\n fgCtx.beginPath();\n fgCtx.arc(ix, iy, r, 0, Math.PI * 2);\n fgCtx.fill();\n\n unknownCtx.globalCompositeOperation = \"source-over\";\n unknownCtx.fillStyle = \"rgba(255,255,255,1)\";\n unknownCtx.beginPath();\n unknownCtx.arc(ix, iy, r, 0, Math.PI * 2);\n unknownCtx.fill();\n }\n } else {\n // Eraser\n if (state.layer === \"unknown\") {\n // Erase unknown AND fg (fg \u2286 unknown constraint)\n unknownCtx.globalCompositeOperation = \"destination-out\";\n unknownCtx.fillStyle = \"rgba(255,255,255,1)\";\n unknownCtx.beginPath();\n unknownCtx.arc(ix, iy, r, 0, Math.PI * 2);\n unknownCtx.fill();\n unknownCtx.globalCompositeOperation = \"source-over\";\n\n fgCtx.globalCompositeOperation = \"destination-out\";\n fgCtx.fillStyle = \"rgba(255,255,255,1)\";\n fgCtx.beginPath();\n fgCtx.arc(ix, iy, r, 0, Math.PI * 2);\n fgCtx.fill();\n fgCtx.globalCompositeOperation = \"source-over\";\n } else {\n // Erase fg only (stays unknown)\n fgCtx.globalCompositeOperation = \"destination-out\";\n fgCtx.fillStyle = \"rgba(255,255,255,1)\";\n fgCtx.beginPath();\n fgCtx.arc(ix, iy, r, 0, Math.PI * 2);\n fgCtx.fill();\n fgCtx.globalCompositeOperation = \"source-over\";\n }\n }\n }\n\n function paintInterpolated(x0, y0, x1, y1) {\n var dx = x1 - x0;\n var dy = y1 - y0;\n var dist = Math.sqrt(dx * dx + dy * dy);\n var imageRadius = getBrushSize() / state.zoom;\n var steps = Math.max(1, Math.ceil(dist / (imageRadius * 0.3)));\n for (var i = 1; i <= steps; i++) {\n var t = i / steps;\n paintAt(x0 + dx * t, y0 + dy * t);\n }\n }\n\n // \u2500\u2500 Flood fill (bucket tool) \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n function floodFillAt(ix, iy) {\n var px = Math.floor(ix);\n var py = Math.floor(iy);\n var w = unknownCanvas.width;\n var h = unknownCanvas.height;\n if (px < 0 || px >= w || py < 0 || py >= h) return;\n\n // Choose the active canvas to read boundaries from\n var activeCanvas = state.layer === \"foreground\" ? fgCanvas : unknownCanvas;\n var activeCtx = state.layer === \"foreground\" ? fgCtx : unknownCtx;\n var imgData = activeCtx.getImageData(0, 0, w, h);\n var data = imgData.data;\n\n // If start pixel is already painted (alpha > 127), nothing to fill\n var startIdx = (py * w + px) * 4;\n if (data[startIdx + 3] > 127) return;\n\n // BFS\n var visited = new Uint8Array(w * h);\n var queue = [py * w + px];\n visited[py * w + px] = 1;\n var filled = [py * w + px];\n\n while (queue.length > 0) {\n var idx = queue.shift();\n var cx = idx % w;\n var cy = (idx - cx) / w;\n\n var neighbors = [];\n if (cx > 0) neighbors.push(idx - 1);\n if (cx < w - 1) neighbors.push(idx + 1);\n if (cy > 0) neighbors.push(idx - w);\n if (cy < h - 1) neighbors.push(idx + w);\n\n for (var i = 0; i < neighbors.length; i++) {\n var ni = neighbors[i];\n if (visited[ni]) continue;\n visited[ni] = 1;\n // Boundary: painted pixels (alpha > 127)\n if (data[ni * 4 + 3] > 127) continue;\n queue.push(ni);\n filled.push(ni);\n }\n }\n\n // Write filled pixels to active canvas\n for (var j = 0; j < filled.length; j++) {\n var fi = filled[j] * 4;\n data[fi] = 255; // R\n data[fi + 1] = 255; // G\n data[fi + 2] = 255; // B\n data[fi + 3] = 255; // A\n }\n activeCtx.putImageData(imgData, 0, 0);\n\n // fg \u2286 unknown: if foreground layer, also fill unknownCanvas\n if (state.layer === \"foreground\") {\n var uData = unknownCtx.getImageData(0, 0, w, h);\n var ud = uData.data;\n for (var k = 0; k < filled.length; k++) {\n var ui = filled[k] * 4;\n ud[ui] = 255;\n ud[ui + 1] = 255;\n ud[ui + 2] = 255;\n ud[ui + 3] = 255;\n }\n unknownCtx.putImageData(uData, 0, 0);\n }\n }\n\n // \u2500\u2500 History \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n function clearHistory() {\n state.history = [];\n state.historyIndex = -1;\n updateHistoryButtons();\n }\n\n function snapshotHistory() {\n var w = unknownCanvas.width;\n var h = unknownCanvas.height;\n if (w === 0 || h === 0) return;\n\n // Truncate redo stack\n state.history = state.history.slice(0, state.historyIndex + 1);\n state.history.push({\n unknown: unknownCtx.getImageData(0, 0, w, h),\n fg: fgCtx.getImageData(0, 0, w, h),\n });\n if (state.history.length > MAX_HISTORY) {\n state.history.shift();\n }\n state.historyIndex = state.history.length - 1;\n updateHistoryButtons();\n }\n\n function undo() {\n if (state.historyIndex <= 0) return;\n state.historyIndex--;\n restoreSnapshot(state.history[state.historyIndex]);\n updateHistoryButtons();\n updateTrimapView();\n commitValue();\n render();\n }\n\n function redo() {\n if (state.historyIndex >= state.history.length - 1) return;\n state.historyIndex++;\n restoreSnapshot(state.history[state.historyIndex]);\n updateHistoryButtons();\n updateTrimapView();\n commitValue();\n render();\n }\n\n function restoreSnapshot(snap) {\n unknownCtx.putImageData(snap.unknown, 0, 0);\n fgCtx.putImageData(snap.fg, 0, 0);\n }\n\n function updateHistoryButtons() {\n undoBtn.disabled = state.historyIndex <= 0;\n redoBtn.disabled = state.historyIndex >= state.history.length - 1;\n }\n\n // \u2500\u2500 Trimap view & value commit \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n // Composites unknownCanvas + fgCanvas into trimapViewCanvas (0/128/255 grayscale).\n // Called after each stroke end, undo/redo, clear.\n function updateTrimapView() {\n var iw = unknownCanvas.width;\n var ih = unknownCanvas.height;\n if (iw === 0 || ih === 0) return;\n\n trimapViewCanvas.width = iw;\n trimapViewCanvas.height = ih;\n\n var unknownData = unknownCtx.getImageData(0, 0, iw, ih).data;\n var fgData = fgCtx.getImageData(0, 0, iw, ih).data;\n var out = trimapViewCtx.createImageData(iw, ih);\n var d = out.data;\n\n for (var i = 0; i < iw * ih; i++) {\n var a = i * 4 + 3;\n var val;\n if (fgData[a] > 127) {\n val = 255;\n } else if (unknownData[a] > 127) {\n val = 128;\n } else {\n val = 0;\n }\n d[i * 4] = val;\n d[i * 4 + 1] = val;\n d[i * 4 + 2] = val;\n d[i * 4 + 3] = 255;\n }\n trimapViewCtx.putImageData(out, 0, 0);\n }\n\n // Encodes the current trimap as a base64 PNG and stores it in props.value.\n // No trigger(\"input\") \u2014 value is picked up lazily when another button fires.\n function commitValue() {\n if (!state.image) return;\n\n // Build image reference\n var imageRef = state.imageUrl;\n if (!imageRef && state.fileUrl) {\n imageRef = state.fileUrl;\n }\n if (!imageRef) {\n // Image upload still in progress \u2014 defer until upload completes\n state.pendingCommit = true;\n return;\n }\n // Strip Gradio file-serving prefix so Python receives a local path.\n // URL may be relative (/gradio_api/file=...) or absolute\n // (http://host/gradio_api/file=...) depending on the source.\n var marker = \"/gradio_api/file=\";\n var idx = imageRef.indexOf(marker);\n if (idx !== -1) {\n imageRef = imageRef.substring(idx + marker.length);\n }\n\n var iw = unknownCanvas.width;\n var ih = unknownCanvas.height;\n var imageRefCopy = imageRef;\n\n trimapViewCanvas.toBlob(function (blob) {\n var reader = new FileReader();\n reader.onload = function () {\n props.value = JSON.stringify({\n image: imageRefCopy,\n trimapBase64: reader.result, // \"data:image/png;base64,...\"\n width: iw,\n height: ih,\n });\n };\n reader.readAsDataURL(blob);\n }, \"image/png\");\n }\n\n // \u2500\u2500 File upload \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n function loadImageFile(file) {\n if (!file || !file.type.startsWith(\"image/\")) return;\n\n // Revoke previous blob URL\n if (state.objectUrl) URL.revokeObjectURL(state.objectUrl);\n\n var url = URL.createObjectURL(file);\n state.objectUrl = url;\n state.fileUrl = null;\n state.imageUrl = null;\n state.imageSource = \"upload\";\n state.pendingCommit = false;\n\n var img = new Image();\n img.onload = function () {\n // Set up canvas and compute zoom BEFORE setting state.image so\n // that any ResizeObserver render triggered by canvasWrapper layout\n // queries finds state.image=null and skips rendering, preventing\n // a brief zoom=1 flash before the first correct render.\n initMaskCanvases(img.naturalWidth, img.naturalHeight);\n clearHistory();\n canvasWrapper.classList.add(\"te-has-image\");\n resizeCanvas();\n var iw = img.naturalWidth;\n var ih = img.naturalHeight;\n var cw = canvas.width;\n var ch = canvas.height;\n var z = Math.min(cw / iw, ch / ih);\n state.zoom = z;\n state.panX = (cw - iw * z) / 2;\n state.panY = (ch - ih * z) / 2;\n // Set state.image last: first render() always has correct zoom/pan,\n // and mousedown's state.image guard blocks clicks until ready.\n state.image = img;\n render();\n };\n img.src = url;\n\n // Upload to server in parallel; image is rendered immediately from blob URL\n uploadToServer(file, url);\n }\n\n function uploadToServer(file, capturedUrl) {\n upload(file).then(function (result) {\n if (state.objectUrl !== capturedUrl) return; // stale upload\n state.fileUrl = result.url;\n // NOTE: Do NOT set props.value = {image, width, height} here.\n // Doing so would re-trigger handleValue, which would treat the\n // server path as a Python-provided image and call initMaskCanvases +\n // clearHistory, wiping any masks the user has already drawn and\n // causing a visible re-initialization flicker.\n // props.value is set by commitValue() (with trimapBase64) when\n // the user draws a stroke or explicitly exports the trimap.\n if (state.pendingCommit) {\n state.pendingCommit = false;\n updateTrimapView();\n commitValue();\n }\n }).catch(function () {\n if (state.objectUrl !== capturedUrl) return;\n });\n }\n\n // \u2500\u2500 Focus on hover so keyboard shortcuts work without a click \u2500\u2500\u2500\u2500\n canvas.addEventListener(\"mouseenter\", function () {\n container.focus();\n });\n\n // \u2500\u2500 Canvas mouse/pointer events \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n canvas.addEventListener(\"mousedown\", function (e) {\n if (!state.image) return;\n // Note: drawing is allowed in trimap view mode so users can fix holes directly\n\n var panActive = state.spaceHeld || state.tool === \"pan\";\n if (e.button === 1 || e.button === 2 || (e.button === 0 && panActive)) {\n // Middle / right button, Space+left-click, or Pan tool \u2192 pan\n e.preventDefault();\n state.isPanning = true;\n state.panStartX = e.clientX;\n state.panStartY = e.clientY;\n state.panStartPanX = state.panX;\n state.panStartPanY = state.panY;\n canvas.style.cursor = \"grabbing\";\n return;\n }\n\n if (e.button !== 0) return;\n\n e.preventDefault();\n\n // Skip drawing on the 2nd click of a double-click (detail >= 2).\n // The dblclick handler will undo the 1st click's dot and reset zoom.\n if (e.detail >= 2) return;\n\n // Bucket tool: single-click flood fill, no drag\n if (state.tool === \"bucket\") {\n var bpt = clientToImage(e.clientX, e.clientY);\n if (state.historyIndex < 0) snapshotHistory();\n floodFillAt(bpt.x, bpt.y);\n snapshotHistory();\n updateTrimapView();\n commitValue();\n requestRender();\n return;\n }\n\n state.isDrawing = true;\n var pt = clientToImage(e.clientX, e.clientY);\n state.lastIX = pt.x;\n state.lastIY = pt.y;\n // Defer the initial dot so double-click doesn't flash a painted pixel.\n // The dot is flushed immediately on mousemove (drag) or after a short\n // timeout (single click without drag). dblclick cancels it entirely.\n state.pendingDot = { x: pt.x, y: pt.y };\n state.pendingDotTimer = setTimeout(function () {\n if (!state.pendingDot) return;\n if (state.historyIndex < 0) snapshotHistory();\n paintAt(state.pendingDot.x, state.pendingDot.y);\n state.pendingDot = null;\n state.pendingDotTimer = null;\n requestRender();\n // mouseup already fired (click without drag) \u2192 finalize stroke\n if (!state.isDrawing) {\n snapshotHistory();\n updateTrimapView();\n commitValue();\n }\n }, 300);\n });\n\n window.addEventListener(\"mousemove\", function (e) {\n if (!state.image) return;\n\n if (state.isPanning) {\n var dx = e.clientX - state.panStartX;\n var dy = e.clientY - state.panStartY;\n var rect = canvas.getBoundingClientRect();\n state.panX = state.panStartPanX + dx * (canvas.width / rect.width);\n state.panY = state.panStartPanY + dy * (canvas.height / rect.height);\n clampPan();\n requestRender();\n return;\n }\n\n // Update cursor position for rendering\n var rect = canvas.getBoundingClientRect();\n if (e.clientX >= rect.left && e.clientX <= rect.right &&\n e.clientY >= rect.top && e.clientY <= rect.bottom) {\n var scaleX = canvas.width / rect.width;\n var scaleY = canvas.height / rect.height;\n state.cursorX = (e.clientX - rect.left) * scaleX;\n state.cursorY = (e.clientY - rect.top) * scaleY;\n state.mouseInsideCanvas = true;\n // Check if cursor is over the actual image area\n var ix = (state.cursorX - state.panX) / state.zoom;\n var iy = (state.cursorY - state.panY) / state.zoom;\n var iw = state.image.naturalWidth;\n var ih = state.image.naturalHeight;\n state.cursorOverImage = ix >= 0 && ix < iw && iy >= 0 && iy < ih;\n } else {\n state.mouseInsideCanvas = false;\n state.cursorOverImage = false;\n }\n updateCursor();\n\n if (state.isDrawing) {\n // Flush deferred dot on first drag move\n if (state.pendingDot) {\n clearTimeout(state.pendingDotTimer);\n state.pendingDotTimer = null;\n if (state.historyIndex < 0) snapshotHistory();\n paintAt(state.pendingDot.x, state.pendingDot.y);\n state.pendingDot = null;\n }\n var pt = clientToImage(e.clientX, e.clientY);\n paintInterpolated(state.lastIX, state.lastIY, pt.x, pt.y);\n state.lastIX = pt.x;\n state.lastIY = pt.y;\n // Keep trimapViewCanvas current so strokes are visible in real-time\n if (state.showTrimap) updateTrimapView();\n }\n\n requestRender();\n });\n\n window.addEventListener(\"mouseup\", function (e) {\n if (state.isPanning) {\n state.isPanning = false;\n updateCursor();\n return;\n }\n if (!state.isDrawing) return;\n state.isDrawing = false;\n // If the dot is still pending (click without drag), let the timer\n // handle painting + snapshotting. dblclick may cancel it.\n if (state.pendingDot) return;\n snapshotHistory();\n updateTrimapView();\n commitValue();\n requestRender();\n });\n\n canvas.addEventListener(\"mouseleave\", function () {\n state.mouseInsideCanvas = false;\n requestRender();\n });\n\n canvas.addEventListener(\"contextmenu\", function (e) {\n e.preventDefault();\n });\n\n // Double-click anywhere \u2192 reset zoom to contain-fit\n // The initial dot from the 1st mousedown is deferred (pendingDot),\n // so we just cancel it here \u2014 no undo needed, no visual flicker.\n canvas.addEventListener(\"dblclick\", function (e) {\n if (!state.image) return;\n e.preventDefault();\n state.isDrawing = false;\n if (state.pendingDotTimer) {\n clearTimeout(state.pendingDotTimer);\n state.pendingDotTimer = null;\n }\n state.pendingDot = null;\n resetZoom();\n });\n\n // \u2500\u2500 Wheel zoom \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n canvas.addEventListener(\"wheel\", function (e) {\n if (!state.image) return;\n e.preventDefault();\n\n var delta = e.deltaY;\n if (e.deltaMode === 1) delta *= 16;\n else if (e.deltaMode === 2) delta *= 100;\n\n var newZoom = state.zoom * (1 - delta * ZOOM_SENSITIVITY);\n newZoom = Math.max(minZoom(), Math.min(MAX_ZOOM, newZoom));\n\n // Zoom toward cursor\n var rect = canvas.getBoundingClientRect();\n var mx = (e.clientX - rect.left) * (canvas.width / rect.width);\n var my = (e.clientY - rect.top) * (canvas.height / rect.height);\n state.panX = mx - (mx - state.panX) * (newZoom / state.zoom);\n state.panY = my - (my - state.panY) * (newZoom / state.zoom);\n state.zoom = newZoom;\n clampPan();\n requestRender();\n }, { passive: false });\n\n // \u2500\u2500 Toolbar controls \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n // Layer buttons\n element.querySelectorAll(\"[data-layer]\").forEach(function (btn) {\n btn.addEventListener(\"click\", function () {\n state.layer = this.getAttribute(\"data-layer\");\n element.querySelectorAll(\"[data-layer]\").forEach(function (b) {\n b.classList.toggle(\"active\", b.getAttribute(\"data-layer\") === state.layer);\n });\n });\n });\n\n // Tool buttons\n element.querySelectorAll(\"[data-tool]\").forEach(function (btn) {\n btn.addEventListener(\"click\", function () {\n activateTool(this.getAttribute(\"data-tool\"));\n });\n });\n\n // Brush size slider\n brushSizeSlider.addEventListener(\"input\", function () {\n state.brushSizeBrush = parseInt(this.value, 10);\n brushSizeVal.textContent = this.value;\n requestRender();\n });\n\n // Eraser size slider\n eraserSizeSlider.addEventListener(\"input\", function () {\n state.brushSizeEraser = parseInt(this.value, 10);\n eraserSizeVal.textContent = this.value;\n requestRender();\n });\n\n // Unknown alpha slider\n unknownAlphaSlider.addEventListener(\"input\", function () {\n state.unknownAlpha = parseInt(this.value, 10) / 100;\n unknownAlphaVal.textContent = this.value + \"%\";\n requestRender();\n });\n\n // Fg alpha slider\n fgAlphaSlider.addEventListener(\"input\", function () {\n state.fgAlpha = parseInt(this.value, 10) / 100;\n fgAlphaVal.textContent = this.value + \"%\";\n requestRender();\n });\n\n // \u2500\u2500 Color palette \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n var _activeColorTarget = null; // \"unknown\" | \"foreground\"\n\n function openColorPalette(targetLayer, anchorEl) {\n _activeColorTarget = targetLayer;\n var currentColor = targetLayer === \"unknown\" ? state.unknownColor : state.fgColor;\n // Mark current selection\n colorPalette.querySelectorAll(\".te-palette-item\").forEach(function (item) {\n item.classList.toggle(\"te-selected\", item.getAttribute(\"data-color\") === currentColor);\n });\n // Position below the anchor swatch\n var rect = anchorEl.getBoundingClientRect();\n var containerRect = container.getBoundingClientRect();\n colorPalette.style.left = Math.max(0, rect.left - containerRect.left) + \"px\";\n colorPalette.style.top = (rect.bottom - containerRect.top + 4) + \"px\";\n colorPalette.classList.add(\"te-visible\");\n }\n\n function closeColorPalette() {\n colorPalette.classList.remove(\"te-visible\");\n _activeColorTarget = null;\n }\n\n unknownColorSwatch.addEventListener(\"click\", function (e) {\n e.stopPropagation();\n if (_activeColorTarget === \"unknown\") { closeColorPalette(); return; }\n openColorPalette(\"unknown\", unknownColorSwatch);\n });\n\n fgColorSwatch.addEventListener(\"click\", function (e) {\n e.stopPropagation();\n if (_activeColorTarget === \"foreground\") { closeColorPalette(); return; }\n openColorPalette(\"foreground\", fgColorSwatch);\n });\n\n colorPalette.addEventListener(\"click\", function (e) {\n e.stopPropagation();\n var item = e.target.closest(\".te-palette-item\");\n if (!item) return;\n var color = item.getAttribute(\"data-color\");\n if (_activeColorTarget === \"unknown\") {\n state.unknownColor = color;\n unknownColorSwatch.style.background = color;\n } else if (_activeColorTarget === \"foreground\") {\n state.fgColor = color;\n fgColorSwatch.style.background = color;\n }\n closeColorPalette();\n requestRender();\n });\n\n // Close palette on outside click\n document.addEventListener(\"click\", function () {\n if (_activeColorTarget) closeColorPalette();\n });\n\n // Prevent palette click from propagating to document\n container.addEventListener(\"click\", function (e) {\n if (_activeColorTarget && !e.target.closest(\".te-color-swatch\") && !e.target.closest(\".te-color-palette\")) {\n closeColorPalette();\n }\n });\n\n // \u2500\u2500 Visibility toggles (eye icon) \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n function toggleVisibility(layer) {\n if (layer === \"foreground\") {\n if (state.fgAlpha > 0) {\n state.savedFgAlpha = state.fgAlpha;\n state.fgAlpha = 0;\n } else {\n state.fgAlpha = state.savedFgAlpha > 0 ? state.savedFgAlpha : 0.60;\n }\n var pct = Math.round(state.fgAlpha * 100);\n fgAlphaSlider.value = pct;\n fgAlphaVal.textContent = pct + \"%\";\n fgVisBtn.classList.toggle(\"te-vis-off\", state.fgAlpha <= 0);\n } else {\n if (state.unknownAlpha > 0) {\n state.savedUnknownAlpha = state.unknownAlpha;\n state.unknownAlpha = 0;\n } else {\n state.unknownAlpha = state.savedUnknownAlpha > 0 ? state.savedUnknownAlpha : 0.40;\n }\n var pct = Math.round(state.unknownAlpha * 100);\n unknownAlphaSlider.value = pct;\n unknownAlphaVal.textContent = pct + \"%\";\n unknownVisBtn.classList.toggle(\"te-vis-off\", state.unknownAlpha <= 0);\n }\n requestRender();\n }\n\n fgVisBtn.addEventListener(\"click\", function () { toggleVisibility(\"foreground\"); });\n unknownVisBtn.addEventListener(\"click\", function () { toggleVisibility(\"unknown\"); });\n\n // Sync eye icon state when sliders are adjusted manually\n fgAlphaSlider.addEventListener(\"input\", function () {\n var val = parseInt(this.value, 10) / 100;\n if (val > 0) state.savedFgAlpha = val;\n fgVisBtn.classList.toggle(\"te-vis-off\", val <= 0);\n });\n unknownAlphaSlider.addEventListener(\"input\", function () {\n var val = parseInt(this.value, 10) / 100;\n if (val > 0) state.savedUnknownAlpha = val;\n unknownVisBtn.classList.toggle(\"te-vis-off\", val <= 0);\n });\n\n // Image toggle\n imageToggleBtn.addEventListener(\"click\", function () {\n state.showImage = !state.showImage;\n imageToggleBtn.classList.toggle(\"active\", state.showImage);\n requestRender();\n });\n\n // Clear (two-click confirm)\n var clearConfirmTimer = null;\n function resetClearBtn() {\n clearBtn.textContent = \"Clear\";\n clearBtn.classList.remove(\"te-btn-danger-confirm\");\n clearConfirmTimer = null;\n }\n clearBtn.addEventListener(\"click\", function () {\n if (!state.image) return;\n if (!clearConfirmTimer) {\n // First click \u2014 ask for confirmation\n clearBtn.textContent = \"Sure?\";\n clearBtn.classList.add(\"te-btn-danger-confirm\");\n clearConfirmTimer = setTimeout(resetClearBtn, 2000);\n return;\n }\n // Second click \u2014 confirmed\n clearTimeout(clearConfirmTimer);\n resetClearBtn();\n snapshotHistory(); // save before clear\n var w = unknownCanvas.width;\n var h = unknownCanvas.height;\n unknownCtx.clearRect(0, 0, w, h);\n fgCtx.clearRect(0, 0, w, h);\n snapshotHistory();\n updateTrimapView();\n commitValue();\n render();\n });\n\n // View Trimap toggle\n viewTrimapBtn.addEventListener(\"click\", function () {\n toggleTrimapView();\n });\n viewCutoutBtn.addEventListener(\"click\", function () {\n toggleCutoutView();\n });\n cutoutInvertBtn.addEventListener(\"click\", function () {\n toggleCutoutInvert();\n });\n\n function toggleTrimapView() {\n if (!state.image) return;\n state.showTrimap = !state.showTrimap;\n if (state.showTrimap) {\n state.showCutout = false;\n viewCutoutBtn.classList.remove(\"active\");\n updateTrimapView();\n }\n viewTrimapBtn.classList.toggle(\"active\", state.showTrimap);\n requestRender();\n }\n\n function toggleCutoutView() {\n if (!state.image) return;\n state.showCutout = !state.showCutout;\n if (state.showCutout) {\n state.showTrimap = false;\n viewTrimapBtn.classList.remove(\"active\");\n } else {\n state.cutoutInvert = false;\n cutoutInvertBtn.classList.remove(\"active\");\n }\n viewCutoutBtn.classList.toggle(\"active\", state.showCutout);\n cutoutInvertBtn.disabled = !state.showCutout;\n requestRender();\n }\n\n function toggleCutoutInvert() {\n if (!state.showCutout) return;\n state.cutoutInvert = !state.cutoutInvert;\n cutoutInvertBtn.classList.toggle(\"active\", state.cutoutInvert);\n requestRender();\n }\n\n // Remove image\n function removeImage() {\n if (!state.image) return;\n\n // Exit maximize mode if active\n if (state.maximized) toggleMaximize();\n\n // Revoke blob URL if any\n if (state.objectUrl) {\n URL.revokeObjectURL(state.objectUrl);\n state.objectUrl = null;\n }\n\n // Reset image state\n state.image = null;\n state.imageUrl = null;\n state.fileUrl = null;\n state.imageSource = null;\n state.pendingCommit = false;\n state.showTrimap = false;\n state.showCutout = false;\n state.cutoutInvert = false;\n viewTrimapBtn.classList.remove(\"active\");\n viewCutoutBtn.classList.remove(\"active\");\n cutoutInvertBtn.classList.remove(\"active\");\n cutoutInvertBtn.disabled = true;\n\n // Reset clear button confirm state\n if (clearConfirmTimer) { clearTimeout(clearConfirmTimer); resetClearBtn(); }\n\n // Clear mask canvases\n unknownCtx.clearRect(0, 0, unknownCanvas.width, unknownCanvas.height);\n fgCtx.clearRect(0, 0, fgCanvas.width, fgCanvas.height);\n clearHistory();\n\n // Remove has-image class to show upload hint\n canvasWrapper.classList.remove(\"te-has-image\");\n\n // Reset file input so same file can be re-selected\n fileInput.value = \"\";\n\n // Clear display canvas\n ctx.setTransform(1, 0, 0, 1, 0, 0);\n ctx.clearRect(0, 0, canvas.width, canvas.height);\n\n // Reset zoom/pan\n state.zoom = 1;\n state.panX = 0;\n state.panY = 0;\n\n // Clear component value\n props.value = \"\";\n }\n\n removeBtn.addEventListener(\"click\", removeImage);\n\n // Maximize\n //\n // Gradio adds a \"pending\" class with opacity < 1 on ancestor elements\n // during server round-trips (.change() handlers). opacity < 1 creates\n // a new stacking context, making z-index: 9999 local to that context\n // and letting other Gradio components render on top of the overlay.\n // To prevent this, pin opacity: 1 !important on all ancestors while\n // maximized.\n var _opacityPinnedEls = [];\n function pinAncestorOpacity() {\n _opacityPinnedEls.forEach(function (el) {\n el.style.removeProperty(\"opacity\");\n });\n _opacityPinnedEls = [];\n if (!state.maximized) return;\n var el = element.parentElement;\n while (el && el !== document.documentElement) {\n el.style.setProperty(\"opacity\", \"1\", \"important\");\n _opacityPinnedEls.push(el);\n el = el.parentElement;\n }\n }\n\n function toggleMaximize() {\n state.maximized = !state.maximized;\n // Set on the Gradio wrapper (element) so DOM morph cannot strip it.\n element.classList.toggle(\"te-maximized\", state.maximized);\n document.body.style.overflow = state.maximized ? \"hidden\" : \"\";\n pinAncestorOpacity();\n if (state.image) {\n requestAnimationFrame(function () {\n resizeCanvas();\n resetZoom();\n });\n }\n }\n\n fitBtn.addEventListener(\"click\", function () { resetZoom(); });\n maximizeBtn.addEventListener(\"click\", toggleMaximize);\n\n // \u2500\u2500 Help dialog \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n function toggleHelp() {\n helpOverlay.classList.toggle(\"te-visible\");\n }\n\n helpBtn.addEventListener(\"click\", toggleHelp);\n helpCloseBtn.addEventListener(\"click\", toggleHelp);\n helpOverlay.addEventListener(\"click\", function (e) {\n if (e.target === helpOverlay) toggleHelp();\n });\n\n // Undo / Redo buttons\n undoBtn.addEventListener(\"click\", undo);\n redoBtn.addEventListener(\"click\", redo);\n updateHistoryButtons();\n\n // \u2500\u2500 File input \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n fileInput.addEventListener(\"change\", function () {\n if (this.files && this.files[0]) {\n loadImageFile(this.files[0]);\n }\n });\n\n // Drag & drop on canvas wrapper\n canvasWrapper.addEventListener(\"dragover\", function (e) { e.preventDefault(); });\n canvasWrapper.addEventListener(\"drop\", function (e) {\n e.preventDefault();\n var file = e.dataTransfer && e.dataTransfer.files && e.dataTransfer.files[0];\n if (file) loadImageFile(file);\n });\n\n // \u2500\u2500 Cursor \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n function updateCursor() {\n if (state.isPanning) {\n canvas.style.cursor = \"grabbing\";\n } else if (state.spaceHeld || state.tool === \"pan\") {\n canvas.style.cursor = \"grab\";\n } else if (state.cursorOverImage) {\n canvas.style.cursor = \"crosshair\";\n } else {\n canvas.style.cursor = \"default\";\n }\n }\n\n // \u2500\u2500 Keyboard shortcuts \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n container.setAttribute(\"tabindex\", \"0\");\n container.style.outline = \"none\";\n\n container.addEventListener(\"keydown\", function (e) {\n if (e.target.tagName === \"INPUT\") return;\n\n // Help dialog shortcuts (work even without image)\n if (e.key === \"?\") {\n toggleHelp(); e.preventDefault(); return;\n }\n if (e.key === \"Escape\" && helpOverlay.classList.contains(\"te-visible\")) {\n toggleHelp(); e.preventDefault(); return;\n }\n\n // Space hold \u2192 temporary pan mode\n if (e.key === \" \" && !e.repeat) {\n e.preventDefault();\n state.spaceHeld = true;\n // Visually highlight Pan button while Space is held\n element.querySelectorAll(\"[data-tool]\").forEach(function (b) {\n b.classList.toggle(\"active\", b.getAttribute(\"data-tool\") === \"pan\");\n });\n updateCursor();\n return;\n }\n\n if (e.key === \"Escape\") {\n if (state.maximized) { toggleMaximize(); e.preventDefault(); }\n return;\n }\n if (e.key === \"i\" || e.key === \"I\") {\n state.showImage = !state.showImage;\n imageToggleBtn.classList.toggle(\"active\", state.showImage);\n requestRender(); e.preventDefault(); return;\n }\n if (e.key === \"m\" || e.key === \"M\") {\n toggleMaximize(); e.preventDefault(); return;\n }\n if (e.key === \"v\" || e.key === \"V\") {\n toggleTrimapView(); e.preventDefault(); return;\n }\n if (e.key === \"c\" || e.key === \"C\") {\n toggleCutoutView(); e.preventDefault(); return;\n }\n if (e.key === \"n\" || e.key === \"N\") {\n toggleCutoutInvert(); e.preventDefault(); return;\n }\n if (e.key === \"u\" || e.key === \"U\") {\n activateLayer(\"unknown\"); e.preventDefault(); return;\n }\n if (e.key === \"f\" || e.key === \"F\") {\n activateLayer(\"foreground\"); e.preventDefault(); return;\n }\n if (e.key === \"b\" || e.key === \"B\") {\n activateTool(\"brush\"); e.preventDefault(); return;\n }\n if (e.key === \"e\" || e.key === \"E\") {\n activateTool(\"eraser\"); e.preventDefault(); return;\n }\n if (e.key === \"p\" || e.key === \"P\") {\n activateTool(\"pan\"); e.preventDefault(); return;\n }\n if (e.key === \"g\" || e.key === \"G\") {\n activateTool(\"bucket\"); e.preventDefault(); return;\n }\n if (e.key === \"x\" || e.key === \"X\") {\n removeImage(); e.preventDefault(); return;\n }\n if (e.key === \"1\") {\n toggleVisibility(\"foreground\"); e.preventDefault(); return;\n }\n if (e.key === \"2\") {\n toggleVisibility(\"unknown\"); e.preventDefault(); return;\n }\n if (e.key === \"[\") {\n adjustBrushSize(-2); e.preventDefault(); return;\n }\n if (e.key === \"]\") {\n adjustBrushSize(2); e.preventDefault(); return;\n }\n if (e.key === \"+\" || e.key === \"=\") {\n zoomToCenter(state.zoom * 1.25); e.preventDefault(); return;\n }\n if (e.key === \"-\" || e.key === \"_\") {\n zoomToCenter(state.zoom / 1.25); e.preventDefault(); return;\n }\n if (e.key === \"0\") {\n resetZoom(); e.preventDefault(); return;\n }\n if (e.ctrlKey && e.shiftKey && (e.key === \"z\" || e.key === \"Z\")) {\n redo(); e.preventDefault(); return;\n }\n if (e.ctrlKey && (e.key === \"z\" || e.key === \"Z\")) {\n undo(); e.preventDefault(); return;\n }\n });\n\n container.addEventListener(\"keyup\", function (e) {\n if (e.key === \" \") {\n state.spaceHeld = false;\n // Restore the actual tool's active state\n element.querySelectorAll(\"[data-tool]\").forEach(function (b) {\n b.classList.toggle(\"active\", b.getAttribute(\"data-tool\") === state.tool);\n });\n updateCursor();\n }\n });\n\n function activateLayer(layer) {\n state.layer = layer;\n element.querySelectorAll(\"[data-layer]\").forEach(function (b) {\n b.classList.toggle(\"active\", b.getAttribute(\"data-layer\") === layer);\n });\n // Cutout preview follows the active layer\n if (state.showCutout) requestRender();\n }\n\n function getBrushSize() {\n return state.tool === \"eraser\" ? state.brushSizeEraser : state.brushSizeBrush;\n }\n\n function activateTool(tool) {\n if (tool === \"pan\" && state.tool === \"pan\") {\n // Toggle off: revert to previous drawing tool\n tool = state.prevDrawTool;\n } else if (tool === \"pan\") {\n // Entering pan: remember current tool for toggle-back\n state.prevDrawTool = state.tool;\n } else {\n // Any non-pan tool: update prevDrawTool\n state.prevDrawTool = tool;\n }\n state.tool = tool;\n element.querySelectorAll(\"[data-tool]\").forEach(function (b) {\n b.classList.toggle(\"active\", b.getAttribute(\"data-tool\") === tool);\n });\n updateCursor();\n }\n\n function adjustBrushSize(delta) {\n var newSize;\n if (state.tool === \"eraser\") {\n newSize = Math.max(2, Math.min(200, state.brushSizeEraser + delta));\n state.brushSizeEraser = newSize;\n eraserSizeSlider.value = newSize;\n eraserSizeVal.textContent = newSize;\n } else {\n newSize = Math.max(2, Math.min(200, state.brushSizeBrush + delta));\n state.brushSizeBrush = newSize;\n brushSizeSlider.value = newSize;\n brushSizeVal.textContent = newSize;\n }\n requestRender();\n }\n\n // \u2500\u2500 Window resize \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\n var resizeTimer = null;\n window.addEventListener(\"resize\", function () {\n if (resizeTimer) clearTimeout(resizeTimer);\n resizeTimer = setTimeout(function () {\n if (state.image) {\n resizeCanvas();\n if (!state.maximized) resetZoom();\n else render();\n }\n }, 150);\n });\n\n})();\n", "default_props": { "value": "{\"image\": \"https://huggingface.co/datasets/gradio/custom-html-gallery/resolve/main/assets/trimap-editor.webp\", \"width\": 960, \"height\": 643, \"trimap\": \"https://huggingface.co/datasets/gradio/custom-html-gallery/resolve/main/assets/trimap-editor-trimap.png\"}" }, "python_code": "class TrimapEditor(gr.HTML):\n \"\"\"Custom Gradio component for drawing trimap masks on images.\n\n A trimap is a 3-class mask:\n 0 \u2192 background (definitely background)\n 128 \u2192 unknown (transition region for matting)\n 255 \u2192 foreground (definitely foreground)\n\n The foreground region is always kept as a subset of the unknown region.\n \"\"\"\n\n def __init__(\n self,\n value: str | Image.Image | Path | None = None,\n *,\n label: str | None = None,\n **kwargs: Any,\n ) -> None:\n html_template = (_STATIC_DIR / \"template.html\").read_text(encoding=\"utf-8\")\n css_template = (_STATIC_DIR / \"style.css\").read_text(encoding=\"utf-8\")\n js_on_load = (_STATIC_DIR / \"script.js\").read_text(encoding=\"utf-8\")\n\n super().__init__(\n value=value,\n label=label,\n show_label=label is not None,\n container=label is not None,\n html_template=html_template,\n css_template=css_template,\n js_on_load=js_on_load,\n apply_default_css=False,\n **kwargs,\n )\n\n def postprocess(self, value: Any) -> str | None:\n if value is None:\n return None\n\n # Tuple/list: (image, trimap) \u2014 load both\n if isinstance(value, (list, tuple)) and len(value) >= 2: # noqa: PLR2004 \u2014 (image, trimap) pair\n img = _load_image(value[0])\n result: dict[str, Any] = {\n \"image\": _save_image_to_cache(img, self.GRADIO_CACHE),\n \"width\": img.width,\n \"height\": img.height,\n }\n if value[1] is not None:\n trimap_img = _load_trimap(value[1])\n result[\"trimap\"] = _save_image_to_cache(trimap_img, self.GRADIO_CACHE, fmt=\"png\")\n return json.dumps(result)\n\n # Single-element list/tuple: unwrap to get the image\n if isinstance(value, (list, tuple)):\n value = value[0]\n\n # Single image (existing behavior)\n img = _load_image(value)\n return json.dumps(\n {\n \"image\": _save_image_to_cache(img, self.GRADIO_CACHE),\n \"width\": img.width,\n \"height\": img.height,\n }\n )\n\n def process_example(self, value: Any) -> str | None:\n if value is None:\n return None\n image_source = value[0] if isinstance(value, (list, tuple)) else value\n try:\n img = _load_image(image_source)\n except Exception: # noqa: BLE001\n return None\n url = _save_image_to_cache(img, self.GRADIO_CACHE)\n img_style = \"max-height:5rem;object-fit:contain;border-radius:4px;\"\n\n # Check for trimap in tuple/list input\n trimap_url = None\n if isinstance(value, (list, tuple)) and len(value) >= 2: # noqa: PLR2004 \u2014 (image, trimap) pair\n try:\n trimap_img = _load_trimap(value[1])\n trimap_url = _save_image_to_cache(trimap_img, self.GRADIO_CACHE, fmt=\"png\")\n except Exception: # noqa: BLE001, S110 \u2014 trimap is optional; fall back to image-only thumbnail\n pass\n\n if trimap_url:\n esc_url = html.escape(url, quote=True)\n esc_trimap = html.escape(trimap_url, quote=True)\n return (\n f'
'\n f'\"image\"'\n f'+'\n f'\"trimap\"'\n f\"
\"\n )\n esc_url = html.escape(url, quote=True)\n return f'\"example\"'\n\n def api_info(self) -> dict[str, Any]:\n return {\n \"type\": \"string\",\n \"description\": (\n \"JSON string. \"\n \"Input (Python\u2192JS): {image: string (URL), width: int, height: int, \"\n \"trimap?: string (URL, optional pre-drawn trimap PNG)}. \"\n \"Pass a (image, trimap) tuple to postprocess() to include a trimap. \"\n \"Output (JS\u2192Python): {image: string (URL), width: int, height: int, \"\n \"trimapBase64: string (data URI 'data:image/png;base64,...')}. \"\n \"trimapBase64 is absent when no trimap has been drawn yet.\"\n ),\n }\n", "head": "", "repo_url": "https://github.com/hysts/gradio-trimap-editor" }