drm_mode: initial replacefb implemenation

2 files changed, 27 insertions, 0 deletions

diff --git a/libdrm/xf86drmMode.c b/libdrm/xf86drmMode.c
index 605377dd..ae15fd65 100644
--- a/libdrm/xf86drmMode.c
+++ b/libdrm/xf86drmMode.c
@@ -608,3 +608,24 @@ int drmCheckModesettingSupported(const char *busid)
 	return -ENOSYS;
 
 }
+
+int drmModeReplaceFB(int fd, uint32_t buffer_id,
+		     uint32_t width, uint32_t height, uint8_t depth,
+		     uint8_t bpp, uint32_t pitch, uint32_t bo_handle)
+{
+	struct drm_mode_fb_cmd f;
+	int ret;
+
+	f.width = width;
+	f.height = height;
+	f.pitch = pitch;
+	f.bpp = bpp;
+	f.depth = depth;
+	f.handle = bo_handle;
+	f.buffer_id = buffer_id;
+
+	if ((ret = ioctl(fd, DRM_IOCTL_MODE_REPLACEFB, &f)))
+		return ret;
+
+	return 0;
+}
diff --git a/libdrm/xf86drmMode.h b/libdrm/xf86drmMode.h
index e5a6ee92..5171b592 100644
--- a/libdrm/xf86drmMode.h
+++ b/libdrm/xf86drmMode.h
@@ -184,6 +184,12 @@ extern int drmModeAddFB(int fd, uint32_t width, uint32_t height, uint8_t depth,
  */
 extern int drmModeRmFB(int fd, uint32_t bufferId);
 
+/**
+ * Replace a framebuffer object with a new one - for resizing the screen.
+ */
+extern int drmModeReplaceFB(int fd, uint32_t buffer_id,
+			    uint32_t width, uint32_t height, uint8_t depth,
+			    uint8_t bpp, uint32_t pitch, uint32_t bo_handle);
 
 /*
  * Crtc functions