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tidy

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trying (and failing) to figure out double buffered flickering...
This commit is contained in:
Shaun Inman 2023-02-10 00:07:27 -05:00
parent 01358f3b33
commit ab7da437c6
3 changed files with 10 additions and 30 deletions
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13
src/common/api.c
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@ -177,11 +177,9 @@ SDL_Surface* GFX_init(int mode) {
gfx.vinfo.yres_virtual = SCREEN_HEIGHT * GFX_BUFFER_COUNT;
gfx.vinfo.xoffset = 0;
gfx.vinfo.yoffset = 0;
gfx.vinfo.activate = FB_ACTIVATE_VBL;
// gfx.vinfo.activate = FB_ACTIVATE_VBL;
if (ioctl(gfx.fb, FBIOPUT_VSCREENINFO, &gfx.vinfo)) {
printf("FBIOPUT_VSCREENINFO failed: %s (%i)\n", strerror(errno), errno);
}
ioctl(gfx.fb, FBIOPUT_VSCREENINFO, &gfx.vinfo);
// get fixed screen info
ioctl(gfx.fb, FBIOGET_FSCREENINFO, &gfx.finfo);
@ -191,12 +189,10 @@ SDL_Surface* GFX_init(int mode) {
struct owlfb_sync_info sinfo;
sinfo.enabled = 1;
if (ioctl(gfx.fb, OWLFB_VSYNC_EVENT_EN, &sinfo)) {
printf("OWLFB_VSYNC_EVENT_EN failed: %s (%i)\n", strerror(errno), errno);
}
ioctl(gfx.fb, OWLFB_VSYNC_EVENT_EN, &sinfo);
// buffer tracking
gfx.buffer = 1;
gfx.buffer = 1; // start on back buffer
gfx.buffer_size = SCREEN_PITCH * SCREEN_HEIGHT;
// return screen
@ -285,6 +281,7 @@ void GFX_flip(SDL_Surface* screen) {
if (gfx.buffer>=GFX_BUFFER_COUNT) gfx.buffer -= GFX_BUFFER_COUNT;
screen->pixels = gfx.map + (gfx.buffer * gfx.buffer_size);
// TODO: this doesn't make sense here but it's the only way to reduce flickering when changing volume/brightness...
if (gfx.vsync!=VSYNC_OFF) {
// this limiting condition helps SuperFX chip games
#define FRAME_BUDGET 17 // 60fps