[Mesa-dev] [PATCH 05/27] gbm: Export a per plane getter for stride

[Ben Widawsky]

From: Ben Widawsky <ben at bwidawsk.net>

Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
 src/gbm/backends/dri/gbm_dri.c | 26 +++++++++++++++++++++++++-
 src/gbm/gbm-symbols-check      |  1 +
 src/gbm/main/gbm.c             | 15 ++++++++++++++-
 src/gbm/main/gbm.h             |  3 +++
 4 files changed, 43 insertions(+), 2 deletions(-)

diff --git a/src/gbm/backends/dri/gbm_dri.c b/src/gbm/backends/dri/gbm_dri.c
index f3ca228..67d67d8 100644
--- a/src/gbm/backends/dri/gbm_dri.c
+++ b/src/gbm/backends/dri/gbm_dri.c
@@ -625,7 +625,31 @@ gbm_dri_bo_get_planes(struct gbm_bo *_bo)
 static uint32_t
 gbm_dri_bo_get_stride(struct gbm_bo *_bo, int plane)
 {
-   return _bo->stride;
+   struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
+   struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
+   __DRIimage *image;
+   int stride = 0;
+
+   if (!dri->image || dri->image->base.version < 11 || !dri->image->fromPlanar) {
+      errno = ENOSYS;
+      return 0;
+   }
+
+   if (bo->image == NULL)
+      return _bo->stride;
+
+   if (plane >= get_number_planes(dri, bo->image))
+      return 0;
+
+   image = dri->image->fromPlanar(bo->image, plane, NULL);
+   if (!image) {
+      /* Use the parent stride */
+      image = bo->image;
+   }
+
+   dri->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &stride);
+
+   return (uint32_t)stride;
 }
 
 static void
diff --git a/src/gbm/gbm-symbols-check b/src/gbm/gbm-symbols-check
index 8c4da1b..944f3e1 100755
--- a/src/gbm/gbm-symbols-check
+++ b/src/gbm/gbm-symbols-check
@@ -14,6 +14,7 @@ gbm_bo_unmap
 gbm_bo_get_width
 gbm_bo_get_height
 gbm_bo_get_stride
+gbm_bo_get_stride_for_plane
 gbm_bo_get_format
 gbm_bo_get_device
 gbm_bo_get_handle
diff --git a/src/gbm/main/gbm.c b/src/gbm/main/gbm.c
index 14c31ad..1c19540 100644
--- a/src/gbm/main/gbm.c
+++ b/src/gbm/main/gbm.c
@@ -165,7 +165,20 @@ gbm_bo_get_height(struct gbm_bo *bo)
 GBM_EXPORT uint32_t
 gbm_bo_get_stride(struct gbm_bo *bo)
 {
-   return bo->gbm->bo_get_stride(bo, 0);
+   return gbm_bo_get_stride_for_plane(bo, 0);
+}
+
+/** Get the stride for the given plane
+ *
+ * \param bo The buffer object
+ * \param plane for which you want the stride
+ *
+ * \sa gbm_bo_get_stride()
+ */
+GBM_EXPORT uint32_t
+gbm_bo_get_stride_for_plane(struct gbm_bo *bo, int plane)
+{
+   return bo->gbm->bo_get_stride(bo, plane);
 }
 
 /** Get the format of the buffer object
diff --git a/src/gbm/main/gbm.h b/src/gbm/main/gbm.h
index b4873ab..3e104d1 100644
--- a/src/gbm/main/gbm.h
+++ b/src/gbm/main/gbm.h
@@ -304,6 +304,9 @@ uint32_t
 gbm_bo_get_stride(struct gbm_bo *bo);
 
 uint32_t
+gbm_bo_get_stride_for_plane(struct gbm_bo *bo, int plane);
+
+uint32_t
 gbm_bo_get_format(struct gbm_bo *bo);
 
 struct gbm_device *
-- 
2.10.2