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- #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 <xf86drm.h>
- #include <xf86drmMode.h>
- struct buffer_object {
- uint32_t width;
- uint32_t height;
- uint32_t pitch;
- uint32_t handle;
- uint32_t size;
- uint8_t *vaddr;
- uint32_t fb_id;
- };
- struct buffer_object buf;
- static int modeset_create_fb(int fd, struct buffer_object *bo)
- {
- struct drm_mode_create_dumb create = {};
- struct drm_mode_map_dumb map = {};
- 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);
- memset(bo->vaddr, 0xff, bo->size);
- 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 uint32_t get_property_id(int fd, drmModeObjectProperties *props,
- const char *name)
- {
- drmModePropertyPtr property;
- uint32_t i, id = 0;
- for (i = 0; i < props->count_props; i++) {
- property = drmModeGetProperty(fd, props->props[i]);
- if (!strcmp(property->name, name))
- id = property->prop_id;
- drmModeFreeProperty(property);
- if (id)
- break;
- }
- return id;
- }
- int main(int argc, char **argv)
- {
- int fd;
- drmModeConnector *conn;
- drmModeRes *res;
- drmModePlaneRes *plane_res;
- drmModeObjectProperties *props;
- drmModeAtomicReq *req;
- uint32_t conn_id;
- uint32_t crtc_id;
- uint32_t plane_id;
- uint32_t blob_id;
- uint32_t property_crtc_id;
- uint32_t property_mode_id;
- uint32_t property_active;
- fd = open("/dev/dri/card0", O_RDWR | O_CLOEXEC);
- res = drmModeGetResources(fd);
- crtc_id = res->crtcs[0];
- conn_id = res->connectors[0];
- drmSetClientCap(fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
- plane_res = drmModeGetPlaneResources(fd);
- plane_id = plane_res->planes[0];
- conn = drmModeGetConnector(fd, conn_id);
- buf.width = conn->modes[0].hdisplay;
- buf.height = conn->modes[0].vdisplay;
- modeset_create_fb(fd, &buf);
- drmSetClientCap(fd, DRM_CLIENT_CAP_ATOMIC, 1);
- props = drmModeObjectGetProperties(fd, conn_id, DRM_MODE_OBJECT_CONNECTOR);
- property_crtc_id = get_property_id(fd, props, "CRTC_ID");
- drmModeFreeObjectProperties(props);
- props = drmModeObjectGetProperties(fd, crtc_id, DRM_MODE_OBJECT_CRTC);
- property_active = get_property_id(fd, props, "ACTIVE");
- property_mode_id = get_property_id(fd, props, "MODE_ID");
- drmModeFreeObjectProperties(props);
- drmModeCreatePropertyBlob(fd, &conn->modes[0],
- sizeof(conn->modes[0]), &blob_id);
- req = drmModeAtomicAlloc();
- drmModeAtomicAddProperty(req, crtc_id, property_active, 1);
- drmModeAtomicAddProperty(req, crtc_id, property_mode_id, blob_id);
- drmModeAtomicAddProperty(req, conn_id, property_crtc_id, crtc_id);
- drmModeAtomicCommit(fd, req, DRM_MODE_ATOMIC_ALLOW_MODESET, NULL);
- drmModeAtomicFree(req);
- printf("drmModeAtomicCommit SetCrtc\n");
- getchar();
- drmModeSetPlane(fd, plane_id, crtc_id, buf.fb_id, 0,
- 50, 50, 320, 320,
- 0, 0, 320 << 16, 320 << 16);
- printf("drmModeSetPlane\n");
- getchar();
- modeset_destroy_fb(fd, &buf);
- drmModeFreeConnector(conn);
- drmModeFreePlaneResources(plane_res);
- drmModeFreeResources(res);
- close(fd);
- return 0;
- }
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