llvmpipe: don't store number of layers per level

This could be recalculated, though it turns out the only use of it after
resource allocation is for calculating whole resource size (for scene size
accounting though that isn't quite ideal neither). Thus, instead just store
the whole resource size and drop it (saving a couple bytes of storage per
resource). It makes things simpler too. Note that for the accounting winsys
resources always come back with size 0 but this is unchanged (we don't actually
know the size in any case).
Also reformat llvmpipe_texture_layout (drop unneded indentation).

v2: adapt to previous changes.

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>

2 files changed, 50 insertions, 78 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_texture.c b/src/gallium/drivers/llvmpipe/lp_texture.c
index 756734b..ec9e024 100644
--- a/src/gallium/drivers/llvmpipe/lp_texture.c
+++ b/src/gallium/drivers/llvmpipe/lp_texture.c
@@ -90,68 +90,60 @@ llvmpipe_texture_layout(struct llvmpipe_screen *screen,
 
    for (level = 0; level <= pt->last_level; level++) {
       uint64_t mipsize;
+      unsigned align_x, align_y, nblocksx, nblocksy, block_size, num_slices;
 
       /* Row stride and image stride */
-      {
-         unsigned align_x, align_y, nblocksx, nblocksy, block_size;
-
-         /* For non-compressed formats we need 4x4 pixel alignment
-          * so we can read/write LP_RASTER_BLOCK_SIZE when rendering to them.
-          * We also want cache line size in x direction,
-          * otherwise same cache line could end up in multiple threads.
-          * For explicit 1d resources however we reduce this to 4x1 and
-          * handle specially in render output code (as we need to do special
-          * handling there for buffers in any case).
-          */
-         if (util_format_is_compressed(pt->format))
-            align_x = align_y = 1;
-         else {
-            align_x = LP_RASTER_BLOCK_SIZE;
-            if (llvmpipe_resource_is_1d(&lpr->base))
-               align_y = 1;
-            else
-               align_y = LP_RASTER_BLOCK_SIZE;
-         }
 
-         nblocksx = util_format_get_nblocksx(pt->format,
-                                             align(width, align_x));
-         nblocksy = util_format_get_nblocksy(pt->format,
-                                             align(height, align_y));
-         block_size = util_format_get_blocksize(pt->format);
-
-         if (util_format_is_compressed(pt->format))
-            lpr->row_stride[level] = nblocksx * block_size;
+      /* For non-compressed formats we need 4x4 pixel alignment
+       * so we can read/write LP_RASTER_BLOCK_SIZE when rendering to them.
+       * We also want cache line size in x direction,
+       * otherwise same cache line could end up in multiple threads.
+       * For explicit 1d resources however we reduce this to 4x1 and
+       * handle specially in render output code (as we need to do special
+       * handling there for buffers in any case).
+       */
+      if (util_format_is_compressed(pt->format))
+         align_x = align_y = 1;
+      else {
+         align_x = LP_RASTER_BLOCK_SIZE;
+         if (llvmpipe_resource_is_1d(&lpr->base))
+            align_y = 1;
          else
-            lpr->row_stride[level] = align(nblocksx * block_size, util_cpu_caps.cacheline);
+            align_y = LP_RASTER_BLOCK_SIZE;
+      }
 
-         /* if row_stride * height > LP_MAX_TEXTURE_SIZE */
-         if ((uint64_t)lpr->row_stride[level] * nblocksy > LP_MAX_TEXTURE_SIZE) {
-            /* image too large */
-            goto fail;
-         }
+      nblocksx = util_format_get_nblocksx(pt->format,
+                                          align(width, align_x));
+      nblocksy = util_format_get_nblocksy(pt->format,
+                                          align(height, align_y));
+      block_size = util_format_get_blocksize(pt->format);
+
+      if (util_format_is_compressed(pt->format))
+         lpr->row_stride[level] = nblocksx * block_size;
+      else
+         lpr->row_stride[level] = align(nblocksx * block_size, util_cpu_caps.cacheline);
 
-         lpr->img_stride[level] = lpr->row_stride[level] * nblocksy;
+      /* if row_stride * height > LP_MAX_TEXTURE_SIZE */
+      if ((uint64_t)lpr->row_stride[level] * nblocksy > LP_MAX_TEXTURE_SIZE) {
+         /* image too large */
+         goto fail;
       }
 
-      /* Number of 3D image slices, cube faces or texture array layers */
-      {
-         unsigned num_slices;
-
-         if (lpr->base.target == PIPE_TEXTURE_CUBE)
-            num_slices = 6;
-         else if (lpr->base.target == PIPE_TEXTURE_3D)
-            num_slices = depth;
-         else if (lpr->base.target == PIPE_TEXTURE_1D_ARRAY ||
-                  lpr->base.target == PIPE_TEXTURE_2D_ARRAY)
-            num_slices = layers;
-         else
-            num_slices = 1;
+      lpr->img_stride[level] = lpr->row_stride[level] * nblocksy;
 
-         lpr->num_slices_faces[level] = num_slices;
-      }
+      /* Number of 3D image slices, cube faces or texture array layers */
+      if (lpr->base.target == PIPE_TEXTURE_CUBE)
+         num_slices = 6;
+      else if (lpr->base.target == PIPE_TEXTURE_3D)
+         num_slices = depth;
+      else if (lpr->base.target == PIPE_TEXTURE_1D_ARRAY ||
+               lpr->base.target == PIPE_TEXTURE_2D_ARRAY)
+         num_slices = layers;
+      else
+         num_slices = 1;
 
       /* if img_stride * num_slices_faces > LP_MAX_TEXTURE_SIZE */
-      mipsize = (uint64_t)lpr->num_slices_faces[level] * lpr->img_stride[level];
+      mipsize = (uint64_t)lpr->img_stride[level] * num_slices;
       if (mipsize > LP_MAX_TEXTURE_SIZE) {
          /* volume too large */
          goto fail;
@@ -214,9 +206,6 @@ llvmpipe_displaytarget_layout(struct llvmpipe_screen *screen,
    const unsigned width = MAX2(1, align(lpr->base.width0, TILE_SIZE));
    const unsigned height = MAX2(1, align(lpr->base.height0, TILE_SIZE));
 
-   lpr->num_slices_faces[0] = 1;
-   lpr->img_stride[0] = 0;
-
    lpr->dt = winsys->displaytarget_create(winsys,
                                           lpr->base.bind,
                                           lpr->base.format,
@@ -283,6 +272,7 @@ llvmpipe_resource_create(struct pipe_screen *_screen,
        * offset doesn't need to be aligned to LP_RASTER_BLOCK_SIZE.
        */
       lpr->data = align_malloc(bytes + (LP_RASTER_BLOCK_SIZE - 1) * 4 * sizeof(float), 64);
+
       /*
        * buffers don't really have stride but it's probably safer
        * (for code doing same calculations for buffers and textures)
@@ -457,9 +447,6 @@ llvmpipe_resource_from_handle(struct pipe_screen *screen,
    assert(lpr->base.height0 == height);
 #endif
 
-   lpr->num_slices_faces[0] = 1;
-   lpr->img_stride[0] = 0;
-
    lpr->dt = winsys->displaytarget_from_handle(winsys,
                                                template,
                                                whandle,
@@ -691,7 +678,7 @@ struct pipe_resource *
 llvmpipe_user_buffer_create(struct pipe_screen *screen,
                             void *ptr,
                             unsigned bytes,
-			    unsigned bind_flags)
+                            unsigned bind_flags)
 {
    struct llvmpipe_resource *buffer;
 
@@ -728,18 +715,6 @@ tex_image_face_size(const struct llvmpipe_resource *lpr, unsigned level)
 
 
 /**
- * Compute size (in bytes) need to store a texture image / mipmap level,
- * including all cube faces or 3D image slices
- */
-static unsigned
-tex_image_size(const struct llvmpipe_resource *lpr, unsigned level)
-{
-   const unsigned buf_size = tex_image_face_size(lpr, level);
-   return buf_size * lpr->num_slices_faces[level];
-}
-
-
-/**
  * Return pointer to a 2D texture image/face/slice.
  * No tiled/linear conversion is done.
  */
@@ -767,18 +742,15 @@ unsigned
 llvmpipe_resource_size(const struct pipe_resource *resource)
 {
    const struct llvmpipe_resource *lpr = llvmpipe_resource_const(resource);
-   unsigned lvl, size = 0;
+   unsigned size = 0;
 
    if (llvmpipe_resource_is_texture(resource)) {
-      for (lvl = 0; lvl <= lpr->base.last_level; lvl++) {
-         if (lpr->tex_data)
-            size += tex_image_size(lpr, lvl);
-      }
+      /* Note this will always return 0 for displaytarget resources */
+      size = lpr->total_alloc_size;
    }
    else {
       size = resource->width0;
    }
-
    return size;
 }
 
diff --git a/src/gallium/drivers/llvmpipe/lp_texture.h b/src/gallium/drivers/llvmpipe/lp_texture.h
index 34c3f60..aa624b0 100644
--- a/src/gallium/drivers/llvmpipe/lp_texture.h
+++ b/src/gallium/drivers/llvmpipe/lp_texture.h
@@ -64,10 +64,10 @@ struct llvmpipe_resource
    unsigned row_stride[LP_MAX_TEXTURE_LEVELS];
    /** Image stride (for cube maps, array or 3D textures) in bytes */
    unsigned img_stride[LP_MAX_TEXTURE_LEVELS];
-   /** Number of 3D slices or cube faces per level */
-   unsigned num_slices_faces[LP_MAX_TEXTURE_LEVELS];
    /** Offset to start of mipmap level, in bytes */
    unsigned mip_offsets[LP_MAX_TEXTURE_LEVELS];
+   /** allocated total size (for non-display target texture resources only) */
+   unsigned total_alloc_size;
 
    /**
     * Display target, for textures with the PIPE_BIND_DISPLAY_TARGET