intel: pass zslice to intel_miptree_image_offset()

This lets us get rid of intel_miptree_depth_offsets() and simplify all
of the calling code.

1 files changed, 26 insertions, 35 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
index 4f5101a312..d9d2edfe19 100644
--- a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
@@ -395,33 +395,26 @@ intel_miptree_set_image_offset(struct intel_mipmap_tree *mt,
 }
 
 
-/* Although we use the image_offset[] array to store relative offsets
- * to cube faces, Mesa doesn't know anything about this and expects
- * each cube face to be treated as a separate image.
- *
- * These functions present that view to mesa:
+/**
+ * Return offset to the start of a 2D slice of a texture (a mipmap level,
+ * cube face, 3D Z slice).
+ * \param mt  the texture object/miptree
+ * \param face  cube map face in [0,5] or zero for non-cube textures
+ * \param level  mipmap level
+ * \param zslice  Z slice of a 3D texture, or zero for non-3D textures
  */
-const GLuint *
-intel_miptree_depth_offsets(struct intel_mipmap_tree *mt, GLuint level)
-{
-   static const GLuint zero = 0;
-
-   if (mt->target != GL_TEXTURE_3D || mt->level[level].nr_images == 1)
-      return &zero;
-   else
-      return mt->level[level].image_offset;
-}
-
-
 GLuint
-intel_miptree_image_offset(struct intel_mipmap_tree *mt,
-			   GLuint face, GLuint level)
+intel_miptree_image_offset(const struct intel_mipmap_tree *mt,
+                           GLuint face, GLuint level, GLuint zslice)
 {
+   GLuint offset = mt->level[level].level_offset;
+
    if (mt->target == GL_TEXTURE_CUBE_MAP_ARB)
-      return (mt->level[level].level_offset +
-	      mt->level[level].image_offset[face]);
-   else
-      return mt->level[level].level_offset;
+      offset += mt->level[level].image_offset[face];
+   else if (mt->target == GL_TEXTURE_3D)
+      offset += mt->level[level].image_offset[zslice];
+
+   return offset;
 }
 
 
@@ -459,7 +452,7 @@ intel_miptree_image_map(struct intel_context * intel,
    }
 
    return (intel_region_map(intel, mt->region) +
-           intel_miptree_image_offset(mt, face, level));
+           intel_miptree_image_offset(mt, face, level, 0));
 }
 
 void
@@ -484,19 +477,18 @@ intel_miptree_image_data(struct intel_context *intel,
 			 GLuint src_image_pitch)
 {
    GLuint depth = dst->level[level].depth;
-   GLuint dst_offset = intel_miptree_image_offset(dst, face, level);
-   const GLuint *dst_depth_offset = intel_miptree_depth_offsets(dst, level);
    GLuint i;
    GLuint height = 0;
 
    DBG("%s: %d/%d\n", __FUNCTION__, face, level);
    for (i = 0; i < depth; i++) {
+      GLuint dst_offset = intel_miptree_image_offset(dst, face, level, i);
       height = dst->level[level].height;
       if(dst->compressed)
 	 height = (height + 3) / 4;
       intel_region_data(intel,
 			dst->region,
-			dst_offset + dst_depth_offset[i], /* dst_offset */
+			dst_offset,
 			0, 0,                             /* dstx, dsty */
 			src,
 			src_row_pitch,
@@ -519,10 +511,6 @@ intel_miptree_image_copy(struct intel_context *intel,
    GLuint width = src->level[level].width;
    GLuint height = src->level[level].height;
    GLuint depth = src->level[level].depth;
-   GLuint dst_offset = intel_miptree_image_offset(dst, face, level);
-   GLuint src_offset = intel_miptree_image_offset(src, face, level);
-   const GLuint *dst_depth_offset = intel_miptree_depth_offsets(dst, level);
-   const GLuint *src_depth_offset = intel_miptree_depth_offsets(src, level);
    GLuint i;
    GLboolean success;
 
@@ -535,10 +523,13 @@ intel_miptree_image_copy(struct intel_context *intel,
    }
 
    for (i = 0; i < depth; i++) {
+      GLuint dst_offset = intel_miptree_image_offset(dst, face, level, i);
+      GLuint src_offset = intel_miptree_image_offset(src, face, level, i);
+
       success = intel_region_copy(intel,
-				  dst->region, dst_offset + dst_depth_offset[i],
+				  dst->region, dst_offset,
 				  0, 0,
-				  src->region, src_offset + src_depth_offset[i],
+				  src->region, src_offset,
 				  0, 0, width, height, GL_COPY);
       if (!success) {
 	 GLubyte *src_ptr, *dst_ptr;
@@ -546,11 +537,11 @@ intel_miptree_image_copy(struct intel_context *intel,
 	 src_ptr = intel_region_map(intel, src->region);
 	 dst_ptr = intel_region_map(intel, dst->region);
 
-	 _mesa_copy_rect(dst_ptr + dst_offset + dst_depth_offset[i],
+	 _mesa_copy_rect(dst_ptr + dst_offset,
 			 dst->cpp,
 			 dst->pitch,
 			 0, 0, width, height,
-			 src_ptr + src_offset + src_depth_offset[i],
+			 src_ptr + src_offset,
 			 src->pitch,
 			 0, 0);
 	 intel_region_unmap(intel, src->region);