mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-28 19:07:47 -04:00
Shokunin
c4215396e3
A title whose netplay mode draws every seat's view into one frame (so all peers keep identical guest state) can now ask the present path to show only this peer's rectangle of the display: psx_netplay_present_local_view(x, y, w, h), usually picked from psx_netplay_local_slot(). The GL dual-raster present shows it from the internal-resolution surface, the software present crops its staged frame, both at 4:3, and the headless present-image ring records the same rectangle. The request is host-only (never serialized or guest-visible), lapses PSX_NETPLAY_LOCAL_VIEW_HOLD ticks after its last renewal so menus fall back to the full frame, survives rollback replays without moving its stamp backwards, and is ignored offline. It wins over [netplay] local_viewport. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
75 lines
2.7 KiB
C
75 lines
2.7 KiB
C
#ifndef NETPLAY_LOCAL_VIEW_H
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#define NETPLAY_LOCAL_VIEW_H
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#include <stdint.h>
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#include <string.h>
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/* Host-only record of the display sub-rectangle a title asked the present
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* path to show for the local netplay seat (psx_netplay_present_local_view).
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* Never serialized and never visible to the guest: every peer still renders
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* and digests the identical full frame. A request covers the simulation tick
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* it was made on plus PSX_NETPLAY_LOCAL_VIEW_HOLD later ticks, so a title only
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* has to renew it while its multi-view screen is up; menus fall back to the
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* full frame by themselves. Rollback resimulation repeats ticks up to
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* PSX_NETPLAY_LOCAL_VIEW_REPLAY behind the newest request; those never move
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* the stamp backwards. A larger step back (a load) restarts it. */
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#define PSX_NETPLAY_LOCAL_VIEW_HOLD 8u
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#define PSX_NETPLAY_LOCAL_VIEW_REPLAY 64u
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typedef struct PsxNetplayLocalView {
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uint32_t x, y, w, h;
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uint32_t tick;
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uint8_t valid;
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} PsxNetplayLocalView;
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static inline void psx_netplay_local_view_reset(PsxNetplayLocalView *view)
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{
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if (view) memset(view, 0, sizeof(*view));
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}
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/* Rejects empty rectangles and anything outside 1024x512 VRAM space. */
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static inline int psx_netplay_local_view_set(PsxNetplayLocalView *view,
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uint32_t tick, uint32_t x,
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uint32_t y, uint32_t w,
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uint32_t h)
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{
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if (!view || w == 0u || h == 0u || x >= 1024u || y >= 512u ||
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w > 1024u - x || h > 512u - y)
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return 0;
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if (view->valid && (int32_t)(tick - view->tick) < 0 &&
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view->tick - tick <= PSX_NETPLAY_LOCAL_VIEW_REPLAY)
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tick = view->tick;
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view->x = x;
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view->y = y;
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view->w = w;
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view->h = h;
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view->tick = tick;
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view->valid = 1u;
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return 1;
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}
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/* 1 and the rectangle when a request is still current at `now` and fits a
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* display of display_w x display_h; 0 otherwise. */
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static inline int psx_netplay_local_view_get(const PsxNetplayLocalView *view,
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uint32_t now, uint32_t display_w,
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uint32_t display_h, uint32_t *x,
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uint32_t *y, uint32_t *w,
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uint32_t *h)
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{
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if (!view || !view->valid)
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return 0;
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const int32_t age = (int32_t)(now - view->tick);
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if (age < 0 ? view->tick - now > PSX_NETPLAY_LOCAL_VIEW_REPLAY
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: (uint32_t)age > PSX_NETPLAY_LOCAL_VIEW_HOLD)
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return 0;
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if (view->x + view->w > display_w || view->y + view->h > display_h)
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return 0;
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if (x) *x = view->x;
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if (y) *y = view->y;
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if (w) *w = view->w;
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if (h) *h = view->h;
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return 1;
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}
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#endif
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