mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 18:25:35 -04:00
Shokunin
8aebc0cdaa
The cache is now ws_scene_cache.h (header-only), used by gpu.c and pinned by tests/test_ws_scene_cache.c: a predicate that flips mid-frame keeps the frame's first answer, a flip between frames is seen on the next frame's first call, an invalidation (savestate load, reset, new predicate) re-evaluates at once, the frame counter wrap re-evaluates, and with the option off every call evaluates as before. generated/OpenBIOS.emitter.sha re-stamped (regen_bios: OpenBIOS C unchanged). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
28 lines
990 B
C
28 lines
990 B
C
#pragma once
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/* ws_scene_cache.h -- the per-VBlank cache behind
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* [widescreen] scene_predicate_per_frame (gpu.c). Header-only so the rule is
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* unit-tested on its own (tests/test_ws_scene_cache.c). */
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#include <stdint.h>
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typedef struct WsSceneCache {
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int valid;
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uint32_t frame;
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int value;
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} WsSceneCache;
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static inline void ws_scene_cache_invalidate(WsSceneCache *c) { c->valid = 0; }
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/* The predicate's answer for `frame`: evaluated on the first call of each
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* frame (or after an invalidation), reused for every later call in it. With
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* `enabled` 0 it is evaluated every time, exactly as without the cache. */
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static inline int ws_scene_cache_get(WsSceneCache *c, int enabled, uint32_t frame,
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int (*predicate)(void)) {
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if (!enabled) return predicate() ? 1 : 0;
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if (!c->valid || c->frame != frame) {
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c->value = predicate() ? 1 : 0;
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c->frame = frame;
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c->valid = 1;
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}
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return c->value;
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}
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