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VIDEO: SDL2 Ignoring multiple successively queued REDRAW events to avoid overrunning the GPU

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This commit is contained in:
Mark Pizzolato 2015-01-16 14:50:44 -08:00
parent 191566fdd8
commit 722579c661
1 changed files with 12 additions and 5 deletions
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17
sim_video.c
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@ -908,10 +908,7 @@ return SCPE_EOF;
void vid_draw (int32 x, int32 y, int32 w, int32 h, uint32 *buf)
{
int32 i;
SDL_Rect vid_dst;
uint32 *pixels;
int pitch;
vid_dst.x = x;
vid_dst.y = y;
@ -927,7 +924,7 @@ void vid_refresh (void)
{
SDL_Event user_event;
sim_debug (SIM_VID_DBG_VIDEO, vid_dev, "vid_refresh() - Queing Refresh Event\n");
sim_debug (SIM_VID_DBG_VIDEO, vid_dev, "vid_refresh() - Queueing Refresh Event\n");
user_event.type = SDL_USEREVENT;
user_event.user.code = EVENT_REDRAW;
@ -1496,6 +1493,9 @@ if (!initialized) {
/* Drag and drop events */
eventtypes[SDL_DROPFILE] = "DROPFILE"; /**< The system requests a file open */
/* Render events */
eventtypes[SDL_RENDER_TARGETS_RESET] = "RENDER_TARGETS_RESET"; /**< The render targets have been reset */
/** Events ::SDL_USEREVENT through ::SDL_LASTEVENT are for your use,
* and should be allocated with SDL_RegisterEvents()
*/
@ -1566,8 +1566,15 @@ while (vid_active) {
/* EVENT_REDRAW to update the display */
/* EVENT_CLOSE to wake up this thread and let */
/* it notice vid_active has changed */
if (event.user.code == EVENT_REDRAW)
if (event.user.code == EVENT_REDRAW) {
SDL_Event dummy_event;
vid_update ();
/* Only do a single video update between waiting for events */
while (SDL_PeepEvents (&dummy_event, 1, SDL_GETEVENT, SDL_USEREVENT, SDL_USEREVENT)) {
sim_debug (SIM_VID_DBG_VIDEO, vid_dev, "vid_thread() - Ignored extra REDRAW Event\n");
}
}
break;
default: