arek
5e7abfb56b
Plan input handling and pattern placement before Game of Life mechanics: keyboard bindings config, mouse placement with preview/rotation, HiDPI scaling, and cell grid. Update AGENTS.md project notes.
1.8 KiB
1.8 KiB
Spec Delta
Purpose
Keeps the application rendering crisp on displays with integer or fractional scaling by converting between logical and physical coordinates.
ADDED Requirements
Requirement: Fractional scale is applied when available
The system SHALL use the compositor-provided fractional preferred scale for rendering when the fractional scale protocol is available.
Scenario: Fractional display
- WHEN the compositor sends a preferred scale of 1.5
- THEN the render buffer is created at 1.5 times the logical size
- AND the buffer is displayed at the logical size
Requirement: Integer scale is used as fallback
The system SHALL use the output's integer scale when fractional scale is unavailable.
Scenario: No fractional protocol
- WHEN the compositor does not support fractional scaling
- THEN the render buffer uses the output integer scale
- AND the buffer is displayed at the logical size
Requirement: Input coordinates remain logical
The system SHALL report mouse positions and grid cells in logical coordinates regardless of the active scale.
Scenario: Scaled click
- WHEN the user clicks on a scaled display
- THEN the selected grid cell matches the visual location of the cursor
Requirement: Rendering uses physical resolution
The system SHALL render all content at physical resolution so that lines and cells stay sharp at the active scale.
Scenario: Sharp cells
- WHEN the application runs on a 2x scaled display
- THEN cells are drawn with 2 physical pixels per logical pixel
Requirement: Scale changes trigger re-render
The system SHALL recreate buffers and re-render when the active scale changes.
Scenario: Scale change
- WHEN the compositor changes the preferred scale
- THEN the application updates its buffers
- AND subsequent frames use the new scale