[Mesa-dev] [PATCH 07/11 v4] gbm: add shared_handle(drm buffer region name)

[Zhao Halley]

  it can be shared among processed
---
 src/gbm/backends/dri/gbm_dri.c |   13 +++++++++++++
 src/gbm/main/gbm.c             |   18 ++++++++++++++++++
 src/gbm/main/gbm.h             |    3 +++
 src/gbm/main/gbmint.h          |    2 ++
 4 files changed, 36 insertions(+), 0 deletions(-)
 mode change 100644 => 100755 src/gbm/main/gbm.c
 mode change 100644 => 100755 src/gbm/main/gbmint.h

diff --git a/src/gbm/backends/dri/gbm_dri.c b/src/gbm/backends/dri/gbm_dri.c
index 9e2bd83..0646b47 100755
--- a/src/gbm/backends/dri/gbm_dri.c
+++ b/src/gbm/backends/dri/gbm_dri.c
@@ -345,6 +345,18 @@ gbm_dri_to_gbm_format(uint32_t dri_format)
    return ret;
 }
 
+static union gbm_bo_handle
+gbm_dri_bo_get_shared_handle(struct gbm_bo *_bo)
+{
+   struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
+   struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
+
+   dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_NAME,
+                          (uint32_t *) &bo->base.base.shared_handle.u32);
+
+   return bo->base.base.shared_handle;
+}
+
 static struct gbm_bo *
 gbm_dri_bo_create_from_egl_image(struct gbm_device *gbm,
                                  void *egl_dpy, void *egl_img,
@@ -522,6 +534,7 @@ dri_device_create(int fd)
    dri->base.base.destroy = dri_destroy;
    dri->base.base.surface_create = gbm_dri_surface_create;
    dri->base.base.surface_destroy = gbm_dri_surface_destroy;
+   dri->base.base.bo_get_shared_handle = gbm_dri_bo_get_shared_handle;
 
    dri->base.type = GBM_DRM_DRIVER_TYPE_DRI;
    dri->base.base.name = "drm";
diff --git a/src/gbm/main/gbm.c b/src/gbm/main/gbm.c
old mode 100644
new mode 100755
index 3994f86..017cb2d
--- a/src/gbm/main/gbm.c
+++ b/src/gbm/main/gbm.c
@@ -231,6 +231,24 @@ gbm_bo_get_handle(struct gbm_bo *bo)
    return bo->handle;
 }
 
+/** Get shared handle(global buffer region name) of the buffer object, 
+ * this handle can be shared among processes
+ *
+ * This is stored in the platform generic union gbm_bo_handle type. However
+ * the format of this handle is platform specific.
+ *
+ * \param bo The buffer object
+ * \return Returns the handle of the allocated buffer object
+ */
+GBM_EXPORT union gbm_bo_handle
+gbm_bo_get_shared_handle(struct gbm_bo *bo)
+{
+   if (bo->shared_handle.u32) return bo->shared_handle;
+   
+   return bo->gbm->bo_get_shared_handle(bo);
+   
+}
+
 /** Write data into the buffer object
  *
  * If the buffer object was created with the GBM_BO_USE_WRITE flag,
diff --git a/src/gbm/main/gbm.h b/src/gbm/main/gbm.h
index b2a0aa3..68309fb 100755
--- a/src/gbm/main/gbm.h
+++ b/src/gbm/main/gbm.h
@@ -257,6 +257,9 @@ gbm_bo_get_device(struct gbm_bo *bo);
 union gbm_bo_handle
 gbm_bo_get_handle(struct gbm_bo *bo);
 
+union gbm_bo_handle
+gbm_bo_get_shared_handle(struct gbm_bo *bo);
+
 int
 gbm_bo_write(struct gbm_bo *bo, const void *buf, size_t count);
 
diff --git a/src/gbm/main/gbmint.h b/src/gbm/main/gbmint.h
old mode 100644
new mode 100755
index 8eb8671..6327f94
--- a/src/gbm/main/gbmint.h
+++ b/src/gbm/main/gbmint.h
@@ -70,6 +70,7 @@ struct gbm_device {
                                               void *egl_dpy, void *egl_img,
                                               uint32_t width, uint32_t height,
                                               uint32_t usage);
+   union gbm_bo_handle (*bo_get_shared_handle)(struct gbm_bo *bo);
    int (*bo_write)(struct gbm_bo *bo, const void *buf, size_t data);
    void (*bo_destroy)(struct gbm_bo *bo);
 
@@ -95,6 +96,7 @@ struct gbm_bo {
    uint32_t pitch;
    uint32_t format;
    union gbm_bo_handle  handle;
+   union gbm_bo_handle  shared_handle; // global handle can be shared among processes
    void *user_data;
    void (*destroy_user_data)(struct gbm_bo *, void *);
 };
-- 
1.7.5.4