gallivm,draw,llvmpipe: use base ptr + mip offsets instead of mip pointers

This might have a slight overhead but handling mip offsets more like
the width (and image) strides should make some things easier (mip level
being just part of the offset calculation) later.

Reviewed-by: Brian Paul <[email protected]>
Reviewed-by: José Fonseca <[email protected]>

1 files changed, 10 insertions, 3 deletions

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample.h b/src/gallium/auxiliary/gallivm/lp_bld_sample.h
index 0f3d8ae6cb5..d8a068d5497 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_sample.h
+++ b/src/gallium/auxiliary/gallivm/lp_bld_sample.h
@@ -157,12 +157,18 @@ struct lp_sampler_dynamic_state
                   struct gallivm_state *gallivm,
                   unsigned unit);
 
-   /** Obtain pointer to array of pointers to mimpap levels */
+   /** Obtain pointer to base of texture */
    LLVMValueRef
-   (*data_ptr)( const struct lp_sampler_dynamic_state *state,
+   (*base_ptr)( const struct lp_sampler_dynamic_state *state,
                 struct gallivm_state *gallivm,
                 unsigned unit);
 
+   /** Obtain pointer to array of mipmap offsets */
+   LLVMValueRef
+   (*mip_offsets)( const struct lp_sampler_dynamic_state *state,
+                   struct gallivm_state *gallivm,
+                   unsigned unit);
+
    /** Obtain texture min lod (returns float) */
    LLVMValueRef
    (*min_lod)(const struct lp_sampler_dynamic_state *state,
@@ -246,7 +252,8 @@ struct lp_build_sample_context
    /* Common dynamic state values */
    LLVMValueRef row_stride_array;
    LLVMValueRef img_stride_array;
-   LLVMValueRef data_array;
+   LLVMValueRef base_ptr;
+   LLVMValueRef mip_offsets;
 
    /** Integer vector with texture width, height, depth */
    LLVMValueRef int_size;