[Mesa-dev] [PATCH 04/15] i965: Add driver hook for TextureView
Chris Forbes
chrisf at ijw.co.nz
Tue Jan 21 02:34:20 PST 2014
We need to wire the original texture's mt into the view. All the hard
work of setting up an appropriate tree of gl_texture_image structures
has already been done by core mesa.
Signed-off-by: Chris Forbes <chrisf at ijw.co.nz>
---
src/mesa/drivers/dri/i965/intel_tex.c | 41 +++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/intel_tex.c b/src/mesa/drivers/dri/i965/intel_tex.c
index 0e08aab..3b14796 100644
--- a/src/mesa/drivers/dri/i965/intel_tex.c
+++ b/src/mesa/drivers/dri/i965/intel_tex.c
@@ -237,6 +237,46 @@ intel_unmap_texture_image(struct gl_context *ctx,
intel_miptree_unmap(brw, mt, tex_image->Level, slice);
}
+static GLboolean
+intel_texture_view(struct gl_context *ctx,
+ struct gl_texture_object *texObj,
+ struct gl_texture_object *origTexObj)
+{
+ struct intel_texture_object *intel_tex = intel_texture_object(texObj);
+ struct intel_texture_object *intel_orig_tex = intel_texture_object(origTexObj);
+
+ assert(intel_orig_tex->mt);
+ intel_miptree_reference(&intel_tex->mt, intel_orig_tex->mt);
+
+ /* Since we can only make views of immutable-format textures,
+ * we can assume that everything is in origTexObj's miptree.
+ *
+ * Mesa core has already made us a copy of all the teximage objects,
+ * except it hasn't copied our mt pointers, etc.
+ */
+ const int numFaces = _mesa_num_tex_faces(texObj->Target);
+ const int numLevels = texObj->NumLevels;
+
+ int face;
+ int level;
+
+ for (face = 0; face < numFaces; face++) {
+ for (level = 0; level < numLevels; level++) {
+ struct gl_texture_image *image = texObj->Image[face][level];
+ struct intel_texture_image *intel_image = intel_texture_image(image);
+
+ intel_miptree_reference(&intel_image->mt, intel_orig_tex->mt);
+ }
+ }
+
+ /* The miptree is in a validated state, so no need to check later. */
+ intel_tex->needs_validate = false;
+ intel_tex->validated_first_level = 0;
+ intel_tex->validated_last_level = numLevels - 1;
+
+ return GL_TRUE;
+}
+
void
intelInitTextureFuncs(struct dd_function_table *functions)
{
@@ -249,4 +289,5 @@ intelInitTextureFuncs(struct dd_function_table *functions)
functions->AllocTextureStorage = intel_alloc_texture_storage;
functions->MapTextureImage = intel_map_texture_image;
functions->UnmapTextureImage = intel_unmap_texture_image;
+ functions->TextureView = intel_texture_view;
}
--
1.8.5.3
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