[Mesa-dev] [PATCH 1/8] __DRIimage: version 5, add new formats and createSubImage

Kristian Høgsberg krh at bitplanet.net
Thu Jul 5 14:50:01 PDT 2012

The additions in version 5 enables creating EGLImages for different planes
of a YUV buffer.  createImageFromName is still used to create the containing
__DRIimage, and createSubImage can then be used no that __DRIimage to create
__DRIimages that correspond to the y, u, and v planes (__DRI_IMAGE_FORMAT_R8)
or the uv planes (__DRI_IMAGE_FORMAT_RG88) for formats such as NV12 where
the u and v components are interleaved.  Packed formats such as YUYV etc
doesn't require any special treatment, we just sample those as a regular
ARGB texture.

Signed-off-by: Kristian Høgsberg <krh at bitplanet.net>
 include/GL/internal/dri_interface.h |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/include/GL/internal/dri_interface.h b/include/GL/internal/dri_interface.h
index e37917e..5dfe15b 100644
--- a/include/GL/internal/dri_interface.h
+++ b/include/GL/internal/dri_interface.h
@@ -907,6 +907,10 @@ struct __DRIdri2ExtensionRec {
 #define __DRI_IMAGE_FORMAT_ARGB8888     0x1003
 #define __DRI_IMAGE_FORMAT_ABGR8888     0x1004
 #define __DRI_IMAGE_FORMAT_XBGR8888     0x1005
+#define __DRI_IMAGE_FORMAT_R8           0x1006 /* Since version 5 */
+#define __DRI_IMAGE_FORMAT_RG88         0x1007
+#define __DRI_IMAGE_FORMAT_YUV420       0x1008
+#define __DRI_IMAGE_FORMAT_NV12         0x1009
 #define __DRI_IMAGE_USE_SHARE		0x0001
 #define __DRI_IMAGE_USE_SCANOUT		0x0002
@@ -963,6 +967,18 @@ struct __DRIimageExtensionRec {
     * \since 4
    int (*write)(__DRIimage *image, const void *buf, size_t count);
+   /**
+    * Create an image out of a sub-region of a parent image.  This
+    * entry point lets us create individual __DRIimages for different
+    * planes in a planar buffer (typically yuv), for example.
+    *
+    * \since 5
+    */
+    __DRIimage *(*createSubImage)(__DRIimage *image,
+                                  int width, int height, int format,
+                                  int offset, int pitch,
+                                  void *loaderPrivate);

More information about the mesa-dev mailing list