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Transparent controls spritesheet, red focus highlight

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Enable alpha blending on the controls texture so sprite icons
float on any background without white cell artifacts. Regenerate
skin template with transparent cells and magenta gutters. Change
focus highlight from blue to red.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Michael Smith
2026-02-15 00:29:09 +01:00
parent 8a638acdd8
commit b8d7a2e405
7 changed files with 677 additions and 2119 deletions
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docs/sdlamp2-fsd.md
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@@ -7,7 +7,7 @@
| Version | 1.0 |
| Status | Draft |
| Created | 2026-02-10 |
| Updated | 2026-02-14 |
| Updated | 2026-02-15 |
## 1. Purpose
@@ -43,6 +43,11 @@ This document specifies the functional requirements for an SDL2 based media play
## 6. Changelog
### 2026-02-15 — Transparent controls spritesheet support
- **Alpha blending on controls texture**: `SDL_SetTextureBlendMode(controls_texture, SDL_BLENDMODE_BLEND)` enables alpha transparency for the controls spritesheet. Sprite icons now float cleanly on any background color instead of showing white cell backgrounds.
- **Transparent skin template**: `gen_skin_template.py` now generates cells with transparent backgrounds (RGBA) instead of white. Gutters use bright magenta (`#FF00FF`) so they're clearly distinguishable from transparent content areas.
### 2026-02-14 — Skin template system and device script reorganization
- **Skin template generator**: New `tools/gen_skin_template.py` (requires Pillow) generates a 642x420 PNG template showing the sprite grid layout with labeled gutters. Skin creators can draw over the white 200x200 cells; the 20px gray gutters (never rendered by the app) identify each cell's purpose.