123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142 |
- #define _GNU_SOURCE
- #include <errno.h>
- #include <fcntl.h>
- #include <stdbool.h>
- #include <stdint.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <sys/mman.h>
- #include <time.h>
- #include <unistd.h>
- #include <signal.h>
- #include <xf86drm.h>
- #include <xf86drmMode.h>
- struct buffer_object {
- uint32_t width;
- uint32_t height;
- uint32_t pitch;
- uint32_t handle;
- uint32_t size;
- uint32_t *vaddr;
- uint32_t fb_id;
- };
- struct buffer_object buf[2] = {0};
- static int terminate = 0;
- static int modeset_create_fb(int fd, struct buffer_object *bo, uint32_t color)
- {
- struct drm_mode_create_dumb create = {};
- struct drm_mode_map_dumb map = {};
- uint32_t i;
- create.width = bo->width;
- create.height = bo->height;
- create.bpp = 32;
- drmIoctl(fd, DRM_IOCTL_MODE_CREATE_DUMB, &create);
- bo->pitch = create.pitch;
- bo->size = create.size;
- bo->handle = create.handle;
- // {24, 32}
- drmModeAddFB(fd, bo->width, bo->height, 32, 32, bo->pitch,
- bo->handle, &bo->fb_id);
- map.handle = create.handle;
- drmIoctl(fd, DRM_IOCTL_MODE_MAP_DUMB, &map);
- bo->vaddr = mmap(0, create.size, PROT_READ | PROT_WRITE,
- MAP_SHARED, fd, map.offset);
- for (i = 0; i < (bo->size / 4); i++)
- bo->vaddr[i] = color;
- return 0;
- }
- static void modeset_destroy_fb(int fd, struct buffer_object *bo)
- {
- struct drm_mode_destroy_dumb destroy = {};
- drmModeRmFB(fd, bo->fb_id);
- munmap(bo->vaddr, bo->size);
- destroy.handle = bo->handle;
- drmIoctl(fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy);
- }
- static void modeset_page_flip_handler(int fd, uint32_t frame,
- uint32_t sec, uint32_t usec,
- void *data)
- {
- static int i = 0;
- uint32_t crtc_id = *(uint32_t *)data;
- drmMsg("[%s,%d]: fd=%d, sec=%d, usec=%d,crtc_id=%d\n",__FUNCTION__,__LINE__,
- fd, sec, usec, crtc_id);
- i ^= 1;
- drmModePageFlip(fd, crtc_id, buf[i].fb_id,
- DRM_MODE_PAGE_FLIP_EVENT, data);
- usleep(500000);
- }
- static void sigint_handler(int arg)
- {
- terminate = 1;
- }
- int main(int argc, char **argv)
- {
- int fd;
- drmEventContext ev = {};
- drmModeConnector *conn;
- drmModeRes *res;
- uint32_t conn_id;
- uint32_t crtc_id;
- signal(SIGINT, sigint_handler);
- ev.version = DRM_EVENT_CONTEXT_VERSION;
- ev.page_flip_handler = modeset_page_flip_handler;
- fd = open("/dev/dri/card0", O_RDWR | O_CLOEXEC);
- res = drmModeGetResources(fd);
- crtc_id = res->crtcs[0];
- conn_id = res->connectors[0];
- conn = drmModeGetConnector(fd, conn_id);
- buf[0].width = conn->modes[0].hdisplay;
- buf[0].height = conn->modes[0].vdisplay;
- buf[1].width = conn->modes[0].hdisplay;
- buf[1].height = conn->modes[0].vdisplay;
- modeset_create_fb(fd, &buf[0], 0xff0000);
- modeset_create_fb(fd, &buf[1], 0x0000ff);
- drmModeSetCrtc(fd, crtc_id, buf[0].fb_id,
- 0, 0, &conn_id, 1, &conn->modes[0]);
- drmModePageFlip(fd, crtc_id, buf[0].fb_id,
- DRM_MODE_PAGE_FLIP_EVENT, &crtc_id);
- while (!terminate) {
- drmHandleEvent(fd, &ev);
- }
- modeset_destroy_fb(fd, &buf[1]);
- modeset_destroy_fb(fd, &buf[0]);
- drmModeFreeConnector(conn);
- drmModeFreeResources(res);
- close(fd);
- return 0;
- }
|