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Diffstat (limited to 'src/mesa/drivers/dri/intel/intel_mipmap_tree.h')
-rw-r--r--src/mesa/drivers/dri/intel/intel_mipmap_tree.h19
1 files changed, 15 insertions, 4 deletions
diff --git a/src/mesa/drivers/dri/intel/intel_mipmap_tree.h b/src/mesa/drivers/dri/intel/intel_mipmap_tree.h
index 3c1a6ffa2a..c9537dbb9a 100644
--- a/src/mesa/drivers/dri/intel/intel_mipmap_tree.h
+++ b/src/mesa/drivers/dri/intel/intel_mipmap_tree.h
@@ -62,18 +62,29 @@
*/
struct intel_mipmap_level
{
+ /**
+ * Byte offset to the base of this level.
+ *
+ * This is used for mipmap levels of 1D/2D/3D textures. However, CUBE
+ * layouts spread images around the whole tree, so the level offset is
+ * always zero in that case.
+ */
GLuint level_offset;
GLuint width;
GLuint height;
+ /** Depth of the mipmap at this level: 1 for 1D/2D/CUBE, n for 3D. */
GLuint depth;
+ /** Number of images at this level: 1 for 1D/2D, 6 for CUBE, depth for 3D */
GLuint nr_images;
- /* Explicitly store the offset of each image for each cube face or
- * depth value. Pretty much have to accept that hardware formats
+ /**
+ * Byte offset from level_offset to the image for each cube face or depth
+ * level.
+ *
+ * Pretty much have to accept that hardware formats
* are going to be so diverse that there is no unified way to
* compute the offsets of depth/cube images within a mipmap level,
- * so have to store them as a lookup table:
- * NOTE level_offset is a byte offset, but the image_offsets are _pixel_ offsets!!!
+ * so have to store them as a lookup table.
*/
GLuint *image_offset;
};