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Ilia Sharin 2026-04-26 14:46:18 -04:00
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11_libraries/icon.md
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@ -6,7 +6,7 @@
Every Workbench-visible file has a companion `.info` file containing its icon imagery, tool types (key=value metadata), default tool, stack size, and position. `icon.library` provides reading, writing, and manipulating these structures.
The `.info` file format is binary, not text. icon.library handles all serialisation.
The `.info` file format is binary, not text. icon.library handles all serialization.
```mermaid
flowchart LR
@ -52,7 +52,7 @@ struct DiskObject {
## Icon Types
| Constant | Value | Description | Workbench Behaviour |
| Constant | Value | Description | Workbench Behavior |
|---|---|---|---|
| `WBDISK` | 1 | Disk/volume icon | Opens drawer showing disk contents |
| `WBDRAWER` | 2 | Drawer (directory) | Opens drawer window |
@ -169,12 +169,12 @@ FreeDiskObject(newIcon);
## OS 3.5+ New-Style Icons
AmigaOS 3.5 introduced **true-colour icons** (PNG-based) alongside the legacy planar format. The `icon.library` v46+ handles both transparently — `GetDiskObject` returns the best available format.
AmigaOS 3.5 introduced **true-color icons** (PNG-based) alongside the legacy planar format. The `icon.library` v46+ handles both transparently — `GetDiskObject` returns the best available format.
| Feature | Legacy (OS 1.x–3.1) | New-Style (OS 3.5+) |
|---|---|---|
| Format | Planar bitplane imagery | PNG/true-colour embedded |
| Colours | 4–16 (Workbench palette) | 24-bit true colour |
| Format | Planar bitplane imagery | PNG/true-color embedded |
| Colors | 4–16 (Workbench palette) | 24-bit true color |
| Size | Fixed (standard sizes) | Scalable |
| Transparency | 1-bit mask | 8-bit alpha channel |
| Storage | `do_Gadget.GadgetRender` | Extended chunks in `.info` |