mvietri/union-minui
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I made it worse somehow

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the threaded version is as janky as the pre-waitforvsync version
This commit is contained in:
Shaun Inman 2023-01-05 23:56:55 -05:00
parent 473af67f51
commit 83e1f03e22
1 changed files with 42 additions and 64 deletions
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104
src/common/api.c
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@ -135,31 +135,23 @@ static struct GFX_Context {
static pthread_t flip_pt;
static pthread_mutex_t flip_mx;
static pthread_cond_t flip_req;
static pthread_cond_t flip_start;
static volatile uint32_t now_flipping;
static int flip_y = 0;
static void* flip_thread(void* param) {
int arg = 0;
int y_offset = 0;
int last_y = 0;
pthread_mutex_lock(&flip_mx);
while (1) {
while (!now_flipping) {
puts("waiting for flip request...");
pthread_cond_wait(&flip_req, &flip_mx);
}
do {
y_offset = gfx.vinfo.yoffset + SCREEN_HEIGHT;
if (y_offset==GFX_BUFFER_COUNT*SCREEN_HEIGHT) y_offset = 0;
gfx.vinfo.yoffset = y_offset;
printf("perform flip: %i (%i)\n", y_offset / SCREEN_HEIGHT, now_flipping);
pthread_cond_signal(&flip_start);
pthread_cond_wait(&flip_req, &flip_mx);
if (flip_y!=last_y) {
pthread_mutex_unlock(&flip_mx);
ioctl(gfx.fb, FBIO_WAITFORVSYNC, &arg); // TODO: disable this when fast forwarding?
gfx.vinfo.yoffset = flip_y;
last_y = flip_y;
int arg = 0;
ioctl(gfx.fb, FBIO_WAITFORVSYNC, &arg); // TODO: disable this when fast forwarding
ioctl(gfx.fb, FBIOPAN_DISPLAY, &gfx.vinfo);
pthread_mutex_lock(&flip_mx);
} while (--now_flipping);
}
}
return NULL;
}
@ -332,9 +324,8 @@ SDL_Surface* GFX_init(void) {
flip_mx = (pthread_mutex_t)PTHREAD_MUTEX_INITIALIZER;
flip_req = (pthread_cond_t)PTHREAD_COND_INITIALIZER;
flip_start = (pthread_cond_t)PTHREAD_COND_INITIALIZER;
now_flipping = 0;
// pthread_create(&flip_pt, NULL, flip_thread, NULL);
pthread_create(&flip_pt, NULL, flip_thread, NULL);
// return screen
gfx.screen = SDL_CreateRGBSurfaceFrom(gfx.map + gfx.buffer_size, SCREEN_WIDTH,SCREEN_HEIGHT, SCREEN_DEPTH,SCREEN_PITCH, 0,0,0,0);
@ -348,56 +339,43 @@ void GFX_clearAll(void) {
}
void GFX_flip(SDL_Surface* screen) {
// pthread_mutex_lock(&flip_mx);
// while (now_flipping==2) {
// puts("waiting for flip to complete...");
// pthread_cond_wait(&flip_start, &flip_mx);
// }
//
// gfx.buffer += 1;
// if (gfx.buffer>=GFX_BUFFER_COUNT) gfx.buffer -= GFX_BUFFER_COUNT;
// screen->pixels = gfx.map + (gfx.buffer * gfx.buffer_size);
//
// printf("request flip: %i (%i)\n", gfx.buffer, now_flipping);
//
// if (!now_flipping) {
// now_flipping = 1;
// pthread_cond_signal(&flip_req);
// pthread_cond_wait(&flip_start, &flip_mx);
// } else {
// now_flipping = 2;
// }
//
// pthread_mutex_unlock(&flip_mx);
// struct fb_vblank vblank;
// ioctl(gfx.fb, FBIOGET_VBLANK, &vblank);
// printf("flags: %i\n", vblank.flags);
// printf("count: %i\n", vblank.count);
// printf("vcount: %i\n", vblank.vcount);
// printf("hcount: %i\n", vblank.hcount);
#ifdef GFX_ENABLE_VSYNC
int arg = 1;
ioctl(gfx.fb, OWLFB_WAITFORVSYNC, &arg); // TODO: this doesn't wait but it also doesn't error out like FBIO_WAITFORVSYNC...
#endif
#ifdef GFX_ENABLE_BUFFER
// TODO: this would be moved to a thread
// I'm not clear on why that would be necessary
// if it's non-blocking and the pan will wait
// until the next vblank...
// what if the scaling was also moved to a thread?
gfx.vinfo.yoffset = gfx.buffer * SCREEN_HEIGHT;
ioctl(gfx.fb, FBIOPAN_DISPLAY, &gfx.vinfo);
pthread_mutex_lock(&flip_mx);
flip_y = gfx.buffer * SCREEN_HEIGHT;
pthread_cond_signal(&flip_req);
pthread_mutex_unlock(&flip_mx);
gfx.buffer += 1;
if (gfx.buffer>=GFX_BUFFER_COUNT) gfx.buffer -= GFX_BUFFER_COUNT;
screen->pixels = gfx.map + (gfx.buffer * gfx.buffer_size);
#endif
// // struct fb_vblank vblank;
// // ioctl(gfx.fb, FBIOGET_VBLANK, &vblank);
// // printf("flags: %i\n", vblank.flags);
// // printf("count: %i\n", vblank.count);
// // printf("vcount: %i\n", vblank.vcount);
// // printf("hcount: %i\n", vblank.hcount);
// #ifdef GFX_ENABLE_VSYNC
// int arg = 1;
// ioctl(gfx.fb, OWLFB_WAITFORVSYNC, &arg); // TODO: this doesn't wait but it also doesn't error out like FBIO_WAITFORVSYNC...
// #endif
//
// #ifdef GFX_ENABLE_BUFFER
// // TODO: this would be moved to a thread
// // I'm not clear on why that would be necessary
// // if it's non-blocking and the pan will wait
// // until the next vblank...
// // what if the scaling was also moved to a thread?
// gfx.vinfo.yoffset = gfx.buffer * SCREEN_HEIGHT;
// ioctl(gfx.fb, FBIOPAN_DISPLAY, &gfx.vinfo);
//
// gfx.buffer += 1;
// if (gfx.buffer>=GFX_BUFFER_COUNT) gfx.buffer -= GFX_BUFFER_COUNT;
// screen->pixels = gfx.map + (gfx.buffer * gfx.buffer_size);
// #endif
}
void GFX_quit(void) {
// pthread_cancel(flip_pt);
// pthread_join(flip_pt, NULL);
pthread_cancel(flip_pt);
pthread_join(flip_pt, NULL);
GFX_clearAll();
munmap(gfx.map, gfx.map_size);