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VIDEO: Fix bug in vid_dst_last handling.

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The handling of vid_dst_last and vid_data_last was not updated to work
with multiple windows, which can cause window updates to be lost.
This commit is contained in:
Lars Brinkhoff 2021-09-03 19:03:15 +02:00
parent 105975feb4
commit a615b89f11
1 changed files with 15 additions and 13 deletions
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28
sim_video.c
View file

@ -371,6 +371,8 @@ DEVICE *vid_dev;
t_bool vid_key_state[SDL_NUM_SCANCODES];
VID_DISPLAY *next;
t_bool vid_blending;
SDL_Rect *vid_dst_last;
uint32 *vid_data_last;
};
SDL_Thread *vid_thread_handle = NULL; /* event thread handle */
@ -868,22 +870,20 @@ uint32 vid_map_rgba_window (VID_DISPLAY *vptr, uint8 r, uint8 g, uint8 b, uint8
return SDL_MapRGBA (vptr->vid_format, r, g, b, a);
}
static SDL_Rect *vid_dst_last;
static uint32 *vid_data_last;
void vid_draw_window (VID_DISPLAY *vptr, int32 x, int32 y, int32 w, int32 h, uint32 *buf)
{
SDL_Event user_event;
SDL_Rect *vid_dst;
SDL_Rect *vid_dst, *last;
uint32 *vid_data;
sim_debug (SIM_VID_DBG_VIDEO, vptr->vid_dev, "vid_draw(%d, %d, %d, %d)\n", x, y, w, h);
SDL_LockMutex (vptr->vid_draw_mutex); /* Synchronize to check region dimensions */
if (vid_dst_last && /* As yet unprocessed draw rectangle? */
(vid_dst_last->x == x) && (vid_dst_last->y == y) && /* AND identical position? */
(vid_dst_last->w == w) && (vid_dst_last->h == h)) { /* AND identical dimensions? */
memcpy (vid_data_last, buf, w*h*sizeof(*buf)); /* Replace region contents */
last = vptr->vid_dst_last;
if (last && /* As yet unprocessed draw rectangle? */
(last->x == x) && (last->y == y) && /* AND identical position? */
(last->w == w) && (last->h == h)) { /* AND identical dimensions? */
memcpy (vptr->vid_data_last, buf, w*h*sizeof(*buf));/* Replace region contents */
SDL_UnlockMutex (vptr->vid_draw_mutex); /* Done */
return;
}
@ -911,8 +911,8 @@ user_event.user.code = EVENT_DRAW;
user_event.user.data1 = (void *)vid_dst;
user_event.user.data2 = (void *)vid_data;
SDL_LockMutex (vptr->vid_draw_mutex); /* protect vid_dst_last & vid_data_last */
vid_dst_last = vid_dst;
vid_data_last = vid_data;
vptr->vid_dst_last = vid_dst;
vptr->vid_data_last = vid_data;
SDL_UnlockMutex (vptr->vid_draw_mutex); /* done protection */
if (SDL_PushEvent (&user_event) < 0) {
sim_printf ("%s: vid_draw() SDL_PushEvent error: %s\n", vid_dname(vptr->vid_dev), SDL_GetError());
@ -1706,9 +1706,9 @@ uint32 *buf = (uint32 *)event->data2;
sim_debug (SIM_VID_DBG_VIDEO, vptr->vid_dev, "Draw Region Event: (%d,%d,%d,%d)\n", vid_dst->x, vid_dst->x, vid_dst->w, vid_dst->h);
SDL_LockMutex (vptr->vid_draw_mutex);
if (vid_dst == vid_dst_last) {
vid_dst_last = NULL;
vid_data_last = NULL;
if (vid_dst == vptr->vid_dst_last) {
vptr->vid_dst_last = NULL;
vptr->vid_data_last = NULL;
}
SDL_UnlockMutex (vptr->vid_draw_mutex);
@ -1780,6 +1780,8 @@ else
SDL_SetWindowTitle (vptr->vid_window, vptr->vid_title);
memset (&vptr->vid_key_state, 0, sizeof(vptr->vid_key_state));
vptr->vid_dst_last = NULL;
vptr->vid_data_last = NULL;
vid_active++;
return 1;