[Mesa-dev] [PATCH v2 2/3] egl: return corresponding offset of EGLImage instead of 0.

[Chuanbo Weng]

The offset should not always be 0. For example, if EGLImage is
created from a 2D texture with EGL_GL_TEXTURE_LEVEL=1, then the
offset should be the actual start of miplevel 1 in bo.

v2: Add version check of __DRIimageExtension implementation
(Suggested by Axel Davy).

Signed-off-by: Chuanbo Weng <chuanbo.weng at intel.com>
---
 src/egl/drivers/dri2/egl_dri2.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/egl/drivers/dri2/egl_dri2.c b/src/egl/drivers/dri2/egl_dri2.c
index 859612f..c529e55 100644
--- a/src/egl/drivers/dri2/egl_dri2.c
+++ b/src/egl/drivers/dri2/egl_dri2.c
@@ -2249,6 +2249,7 @@ dri2_export_dma_buf_image_mesa(_EGLDriver *drv, _EGLDisplay *disp, _EGLImage *im
    struct dri2_egl_image *dri2_img = dri2_egl_image(img);
 
    (void) drv;
+   EGLint img_offset = 0;
 
    /* rework later to provide multiple fds/strides/offsets */
    if (fds)
@@ -2259,8 +2260,14 @@ dri2_export_dma_buf_image_mesa(_EGLDriver *drv, _EGLDisplay *disp, _EGLImage *im
       dri2_dpy->image->queryImage(dri2_img->dri_image,
 				  __DRI_IMAGE_ATTRIB_STRIDE, strides);
 
-   if (offsets)
+   if (offsets){
       offsets[0] = 0;
+      if(dri2_dpy->image->base.version >= 13){
+         dri2_dpy->image->queryImage(dri2_img->dri_image,
+             __DRI_IMAGE_ATTRIB_OFFSET, &img_offset);
+         offsets[0] = img_offset;
+      }
+   }
 
    return EGL_TRUE;
 }
-- 
1.9.1