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finally fixed GFX_clearAll()

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waits till front buffer is the backbuffer before clearing
This commit is contained in:
Shaun Inman 2023-03-20 19:40:26 -04:00
parent 7882f9b9dd
commit 989079ad19
1 changed files with 9 additions and 4 deletions
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13
src/common/api.c
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@ -72,7 +72,7 @@ static void ion_alloc(int fd_ion, ion_alloc_info_t* info) {
iad.len = info->size;
iad.align = sysconf(_SC_PAGESIZE);
iad.heap_id_mask = (1<<ION_HEAP_ID_PMEM);
iad.flags = ION_FLAG_CACHED_NEEDS_SYNC;
iad.flags = 0;
if (ioctl(fd_ion, ION_IOC_ALLOC, &iad)<0) fprintf(stderr, "ION_ALLOC failed %s\n",strerror(errno));
icd.cmd = OWL_ION_GET_PHY;
icd.arg = (uintptr_t)&ipd;
@ -310,6 +310,7 @@ static struct GFX_Context {
int width;
int height;
int pitch;
int cleared;
} gfx;
static SDL_Rect asset_rects[] = {
@ -466,8 +467,8 @@ void GFX_clear(SDL_Surface* screen) {
memset(screen->pixels, 0, PAGE_SIZE);
}
void GFX_clearAll(void) {
// TODO: one buffer is onscreen when cleared producing tearing
memset(gfx.fb_info.vadd, 0, PAGE_SIZE * PAGE_COUNT);
GFX_clear(gfx.screen); // clear backbuffer
gfx.cleared = 1; // defer clearing frontbuffer until offscreen
}
void GFX_setMode(int mode) {
@ -542,10 +543,14 @@ void GFX_flip(SDL_Surface* screen) {
}
}
// swap backbuffer
gfx.page ^= 1;
gfx.screen->pixels = gfx.fb_info.vadd + gfx.page * PAGE_SIZE;
if (gfx.cleared) {
GFX_clear(gfx.screen);
gfx.cleared = 0;
}
}
void GFX_sync(void) {
if (gfx.vsync!=VSYNC_OFF) {