Phases 3–7: Complete GPU menu rendering pipeline#99

Merged

deevus merged 53 commits intomasterfrom

feat/menu-gpu-phase-7

Mar 19, 2026

Commits on Mar 18, 2026

feat: add fade_music_start/step/finish helpers for audio volume fading
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feat: add GPU-based fade overlay system to menu renderer
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feat: initialize and expose MenuRenderer singleton in main engine
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refactor: replace software display_block calls with GPU menu_render_sprite in frontend
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fix: remove UpdateSDLWindow guard that blocked splash screens
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fix: correct palette timing, bounds check, and wire GPU fades
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refactor: replace RGB color comparison transparency with alpha channel discard in menu pixel shader
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fix: bake palette index 0 transparency into alpha channel at texture upload time
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feat: add text rendering declarations to menu_render.h
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feat: implement menu_render_text and menu_render_scaled_text for GPU text rendering
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feat: wire GPU text rendering in main menu
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fix: enable alpha discard in text rendering so glyph backgrounds are transparent
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fix: move fade-in before first render frame to prevent flash at fade peak
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fix: zero pal_addr after GPU fade-out so software screens don't flash stale content
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fix: add GPU fade-out before sub-menu transitions to prevent stale scrbuf flash
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feat: implement 3D preview compositing for car and track previews
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refactor: remove menu_render_preview (3D previews deferred to Phase 6)
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feat: convert car selection screen to GPU renderer
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feat: convert load/save screen to GPU renderer
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feat: convert track selection screen to GPU renderer
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feat: convert configure screen to GPU renderer
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feat: convert player selection screen to GPU renderer
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feat: convert game type selection screen to GPU renderer
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feat: convert NetworkWait screen to GPU renderer
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fix: skip GPU fade-out before Exit to DOS menu selection to preserve Y/N prompt visibility
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feat: add GPU mesh shaders for 3D car and track previews
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feat: implement GPU-based 3D mesh rendering pipeline for menu car and track previews
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feat: replace DrawCar/show_3dmap calls with menu_render GPU mesh preview API
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build: update compile_flagz dependency hash
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fix: correct car mesh orientation, camera position, and add yaw rotation
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fix: derive car preview FOV from game's VIEWDIST constant
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fix: adjust preview render position coordinates from (170, 10) to (248, 57)
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refactor: simplify track mesh generation to use centered single-quad-per-segment approach with height-based coloring
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feat: add no-depth pipeline variant and floor quad to track map 3D preview
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Commits on Mar 19, 2026