diff options
| -rw-r--r-- | minuitwrp/graphics_drm.cpp | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/minuitwrp/graphics_drm.cpp b/minuitwrp/graphics_drm.cpp index c321bb7d8..aaa9e4e19 100644 --- a/minuitwrp/graphics_drm.cpp +++ b/minuitwrp/graphics_drm.cpp @@ -42,6 +42,7 @@ struct drm_surface { static drm_surface *drm_surfaces[2]; static int current_buffer; +static bool flip_pending = false; static GRSurface *draw_buf = NULL; static drmModeCrtc *main_monitor_crtc; @@ -480,18 +481,36 @@ static GRSurface* drm_init(minui_backend* backend __unused) { return draw_buf; } +static void drm_page_flip_event(int fd, unsigned int frame, unsigned int sec, + unsigned int usec, void *data) { + flip_pending = false; +} + static GRSurface* drm_flip(minui_backend* backend __unused) { int ret; + drmEventContext ev; + + memset(&ev, 0, sizeof(ev)); + memcpy(drm_surfaces[current_buffer]->base.data, draw_buf->data, draw_buf->height * draw_buf->row_bytes); + ev.version = 2; + ev.page_flip_handler = drm_page_flip_event; + + /* wait for previous page flip, if any, to complete */ + while (flip_pending) { + drmHandleEvent(drm_fd, &ev); + } ret = drmModePageFlip(drm_fd, main_monitor_crtc->crtc_id, - drm_surfaces[current_buffer]->fb_id, 0, NULL); + drm_surfaces[current_buffer]->fb_id, DRM_MODE_PAGE_FLIP_EVENT, NULL); if (ret < 0) { printf("drmModePageFlip failed ret=%d\n", ret); return NULL; } + + flip_pending = true; current_buffer = 1 - current_buffer; return draw_buf; } |