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Improve infinite canvas interactions and browser chrome Render Lucide icons directly with Raylib, add searchable icon browsing, robust text editing, entity lifecycle animations, z-order-safe input, semantic themes, and animated editable browser controls. Document rendering, pinning, context, and component extension for future agents. Co-authored-by: Copilot <[email protected]> Copilot-Session: f68442b1-fa8f-46a0-9689-81710613bbd4
author MrJuneJune <me@mrjunejune.com>
date Mon, 17 Aug 2026 22:16:14 -0700
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1 # Infinite Canvas
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2
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3 Native and WebAssembly Raylib 6 prototype for a world-space, immediate-mode
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4 infinite canvas.
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5
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6 ## Build and run
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7
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8 ```bash
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9 # Native development build with Raygui controls
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10 bazel run //infinite_canvas:dev
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11
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12 # Start directly in the ten-browser stress scene
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13 INFINITE_CANVAS_BROWSER_STRESS=1 bazel run //infinite_canvas:dev
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14
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15 # Native build without development UI
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16 bazel run //infinite_canvas:app
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17
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18 # Browser build and local server
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19 bazel build //infinite_canvas:infinite_canvas_wasm
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20 bazel run //infinite_canvas:serve
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21 ```
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22
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23 Open `http://127.0.0.1:4343/index.html` after starting the server. Pass a
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24 different port as an argument only when needed.
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25
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26 The native development target opens at 1920x1200 and starts with a gallery
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27 layout containing one non-overlapping example of every entity type.
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28
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29 Theme mode defaults to `auto`, which follows the OS light/dark preference at
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30 startup. Rendering consumes a shared semantic `Canvas_Theme` palette for the
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31 canvas, developer controls, and camera-pinned notifications. Until the planned
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32 config file lands, `INFINITE_CANVAS_THEME=light|dark|auto` provides an explicit
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33 override. The developer panel also includes a live light/dark mode toggle.
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34
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35 ## Controls
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36
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37 - Middle-mouse drag, or Space + left-mouse drag: pan
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38 - Mouse wheel: scroll vertically
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39 - Ctrl/Cmd + mouse wheel: zoom around the cursor
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40 - WASD or arrow keys: pan (disabled while a text area has keyboard focus)
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41 - Left-mouse drag on an entity: select and move it
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42 - `P`: pin or unpin the selected entity in screen space so it remains visible
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43 while the camera pans and zooms; pinned entities show a Lucide pin glyph
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44 - `Delete`/`Backspace`: fade out and remove the selected entity
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45 - Development toolbar: spawn/clear entities, reset the camera, or restore the
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46 deterministic demo scene; spawned entities fade in and Clear fades all
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47 entities out before removal
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48 - `View camera context`: open a live, scrollable snapshot of entities
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49 intersecting the camera viewport and their current semantic values
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50 - `Lucide icon gallery`: create or revisit a dedicated canvas region containing
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51 the complete searchable, scrollable Lucide 1.31.0 icon set and fit the camera
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52 to it
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53 - `10 browser stress scene`: lay out ten compact independent browser views for
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54 performance testing
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55 - `White`/`Grid`: toggle the optional grid; the default canvas is pure white
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56
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57 Canvas primitives include shapes, lines, text, buttons, editable text areas,
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58 dropdowns, accordions, cards, calendars, switches, tables, notifications,
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59 scrollable areas, images, and web content. Accordions
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60 expand with eased height, chevron, divider, and content transitions; cards
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61 toggle emphasis, calendars select dates, and switches animate their track color
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62 and thumb position when toggled. The default browser build embeds
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63 `https://mrjunejune.com` in a camera-tracked iframe. Native builds open
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64 `https://www.google.com` in a CEF off-screen browser whose pixel buffer is
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65 uploaded into a Raylib texture. It remains inside the canvas and participates
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66 in pan, zoom, clipping, and entity dragging on Windows, macOS, and Linux. Web
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67 views show a Raylib-rendered Lucide back/forward toolbar and current URL only
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68 while selected. The toolbar eases open by pushing the page viewport downward
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69 and reverses the transition when deselected. Click the URL field to edit it;
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70 Enter navigates, Escape cancels, and standard Ctrl/Cmd clipboard and selection
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71 shortcuts work. Drag the remaining outer edge to move the view and drag the
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72 bottom-right handle to resize it. Embedded pages inherit the selected canvas
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73 light or dark color scheme where the browser backend supports it. Multiple web entities have independent
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74 browser instances, URLs, focus, input, and rendering. Browser resources are
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75 assigned only to visible entities, off-screen views are suspended, and the
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76 native CEF pool supports up to twelve live browsers. Small background views
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77 render at a reduced frame rate, larger views receive a moderate frame budget,
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78 and the focused view runs at 30 FPS so scenes with ten compact browsers remain
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79 responsive without giving every page the maximum rendering budget. Native
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80 browser viewport and texture resolution follow the displayed view size in
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81 64-pixel buckets, capped at 1280x800, so resized views become sharper without
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82 reallocating continuously during a drag.
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83
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84 The Lucide gallery is one scalable Raylib-rendered canvas entity rather than
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85 thousands of individual scene entities or an embedded browser. Reopening it
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86 reuses the existing entity and moves the camera back to its fitted bounds. Its
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87 ISC-licensed vector data is generated from Lucide 1.31.0 and the visible grid
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88 rows are drawn directly with Raylib primitives.
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89
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90 Tables support row selection, and notifications behave as bottom-right toast
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91 cards: multiple toasts overlap compactly, fan into a spaced stack on hover,
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92 and slide/fade away from either Undo or close. Position, size, stack expansion,
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93 and dismissal all use eased frame-rate-independent transitions. Scrollable areas consume the
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94 mouse wheel without zooming the camera. Image
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95 entities render HTTPS URLs or native filesystem paths through CEF; browser
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96 builds render URLs or paths available in the Emscripten filesystem. Override
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97 the demo image in native development with
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98 `INFINITE_CANVAS_IMAGE_SOURCE=/path/to/image.png`.
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99
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100 The first native build downloads the platform CEF 151 minimal distribution.
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101 Linux stages its runtime once under
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102 `~/.cache/zenbu/infinite-canvas/cef-151`; application state and the RGBA paint
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103 buffer remain owned by the Dowa arena, while CEF owns its browser internals.
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104
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105 Buttons animate on hover/press and toggle when clicked. Dropdowns open a real
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106 option menu with hover and selection states. Selected text areas accept typing,
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107 wrap text, support click/drag selection and scrolling, and provide
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108 Ctrl/Cmd+A/C/X/V clipboard shortcuts plus Shift selection, word navigation,
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109 Home/End, Backspace, and Delete. Drag a text area's narrow outer padding to
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110 move it without changing the selection.
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111
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112 Camera context is derived from the visible world rather than a hidden
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113 conversation store. Panning entities outside the viewport removes them;
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114 zooming out includes and concatenates newly visible entities. Each entry
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115 contains identity, type, placement, pin state, and type-specific state such as
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116 text content, dropdown selection, switch value, selected calendar date or table
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117 row, scroll position, image source, and browser URL. The current text format is
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118 intentionally provisional so it can later be replaced by the final API
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119 contract.
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120
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121 The prototype uses the Inter variable font under the SIL Open Font License.
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122
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123 Agent-oriented architecture and extension notes live in
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124 [`docs/README.md`](docs/README.md).
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125
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126 ## Memory ownership
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127
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128 The application creates one Dowa arena. Application state and the fixed-capacity
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129 entity array are arena-owned, there are no per-frame first-party allocations,
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130 and the arena is released once during native shutdown. Browser lifetime memory
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131 is reclaimed with the WebAssembly runtime when the page closes.