[Mesa-dev] [PATCH 28/30] i965: Pretend that CCS modified images are two planes

[Jason Ekstrand]

From: Ben Widawsky <ben at bwidawsk.net>

v2: move is_aux into if block. (Jason)
Use else block instead of goto (Jason)

v3: Fix up logic for is_aux (Ben)
Fix up size calculations and add FIXME (Ben)

v4 (Jason Ekstrand):
Use the aux_pitch in the image instead of calculating it

Cc: Jason Ekstrand <jason at jlekstrand.net>
Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
Acked-by: Daniel Stone <daniels at collabora.com>
---
 src/mesa/drivers/dri/i965/intel_screen.c | 54 +++++++++++++++++++-------------
 1 file changed, 33 insertions(+), 21 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
index 7d6adb7..6237931f 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -757,7 +757,7 @@ intel_query_image(__DRIimage *image, int attrib, int *value)
    case __DRI_IMAGE_ATTRIB_FOURCC:
       return intel_lookup_fourcc(image->dri_format, value);
    case __DRI_IMAGE_ATTRIB_NUM_PLANES:
-      *value = 1;
+      *value = image->aux_offset ? 2: 1;
       return true;
    case __DRI_IMAGE_ATTRIB_OFFSET:
       *value = image->offset;
@@ -1149,31 +1149,43 @@ intel_from_planar(__DRIimage *parent, int plane, void *loaderPrivate)
     struct intel_image_format *f;
     __DRIimage *image;
 
-    if (parent == NULL || parent->planar_format == NULL)
-        return NULL;
-
-    f = parent->planar_format;
-
-    if (plane >= f->nplanes)
-        return NULL;
-
-    width = parent->width >> f->planes[plane].width_shift;
-    height = parent->height >> f->planes[plane].height_shift;
-    dri_format = f->planes[plane].dri_format;
-    index = f->planes[plane].buffer_index;
-    offset = parent->offsets[index];
-    stride = parent->strides[index];
+    if (parent == NULL) {
+       return NULL;
+    } else if (parent->planar_format == NULL) {
+       const bool is_aux = parent->aux_offset && plane == 1;
+       if (!is_aux)
+          return NULL;
+
+       width = parent->width;
+       height = parent->height;
+       dri_format = parent->dri_format;
+       offset = parent->aux_offset;
+       stride = parent->aux_pitch;
+    } else {
+       /* Planar formats don't support aux buffers/images */
+       assert(!parent->aux_offset);
+       f = parent->planar_format;
+
+       if (plane >= f->nplanes)
+          return NULL;
+
+       width = parent->width >> f->planes[plane].width_shift;
+       height = parent->height >> f->planes[plane].height_shift;
+       dri_format = f->planes[plane].dri_format;
+       index = f->planes[plane].buffer_index;
+       offset = parent->offsets[index];
+       stride = parent->strides[index];
+
+       if (offset + height * stride > parent->bo->size) {
+          _mesa_warning(NULL, "intel_create_sub_image: subimage out of bounds");
+          return NULL;
+       }
+    }
 
     image = intel_allocate_image(parent->screen, dri_format, loaderPrivate);
     if (image == NULL)
        return NULL;
 
-    if (offset + height * stride > parent->bo->size) {
-       _mesa_warning(NULL, "intel_create_sub_image: subimage out of bounds");
-       free(image);
-       return NULL;
-    }
-
     image->bo = parent->bo;
     brw_bo_reference(parent->bo);
     image->modifier = parent->modifier;
-- 
2.5.0.400.gff86faf