gallium/util: add 1d/2d mipmap generation support

so far only hw mipmap generation is testing on softpipe,
passes test added to piglit.

this requires another patch to mesa to let array textures mipmaps
even start to happen.

1 files changed, 37 insertions, 6 deletions

diff --git a/src/gallium/auxiliary/util/u_gen_mipmap.c b/src/gallium/auxiliary/util/u_gen_mipmap.c
index 3b6342ad8d1..3698be77b2e 100644
--- a/src/gallium/auxiliary/util/u_gen_mipmap.c
+++ b/src/gallium/auxiliary/util/u_gen_mipmap.c
@@ -67,7 +67,7 @@ struct gen_mipmap_state
    struct pipe_vertex_element velem[2];
 
    void *vs;
-   void *fs1d, *fs2d, *fs3d, *fsCube;
+   void *fs1d, *fs2d, *fs3d, *fsCube, *fs1da, *fs2da;
 
    struct pipe_resource *vbuf;  /**< quad vertices */
    unsigned vbuf_slot;
@@ -1321,6 +1321,11 @@ util_create_gen_mipmap(struct pipe_context *pipe,
                                                TGSI_INTERPOLATE_LINEAR);
    ctx->fsCube = util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_CUBE,
                                                TGSI_INTERPOLATE_LINEAR);
+   ctx->fs1da = util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_1D_ARRAY,
+                                               TGSI_INTERPOLATE_LINEAR);
+   ctx->fs2da = util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_2D_ARRAY,
+                                               TGSI_INTERPOLATE_LINEAR);
+
 
    /* vertex data that doesn't change */
    for (i = 0; i < 4; i++) {
@@ -1390,8 +1395,25 @@ set_vertex_data(struct gen_mipmap_state *ctx,
       util_map_texcoords2d_onto_cubemap(layer, &st[0][0], 2,
                                         &ctx->vertices[0][1][0], 8);
    }
-   else {
-      /* 1D/2D/3D */
+   else if (tex_target == PIPE_TEXTURE_1D_ARRAY) {
+      /* 1D texture array  */
+      ctx->vertices[0][1][0] = 0.0f; /*s*/
+      ctx->vertices[0][1][1] = r; /*t*/
+      ctx->vertices[0][1][2] = 0.0f;    /*r*/
+
+      ctx->vertices[1][1][0] = 1.0f;
+      ctx->vertices[1][1][1] = r;
+      ctx->vertices[1][1][2] = 0.0f;
+
+      ctx->vertices[2][1][0] = 1.0f;
+      ctx->vertices[2][1][1] = r;
+      ctx->vertices[2][1][2] = 0.0f;
+
+      ctx->vertices[3][1][0] = 0.0f;
+      ctx->vertices[3][1][1] = r;
+      ctx->vertices[3][1][2] = 0.0f;
+   } else {
+      /* 1D/2D/3D/2D array */
       ctx->vertices[0][1][0] = 0.0f; /*s*/
       ctx->vertices[0][1][1] = 0.0f; /*t*/
       ctx->vertices[0][1][2] = r;    /*r*/
@@ -1427,6 +1449,8 @@ util_destroy_gen_mipmap(struct gen_mipmap_state *ctx)
 {
    struct pipe_context *pipe = ctx->pipe;
 
+   pipe->delete_fs_state(pipe, ctx->fs2da);
+   pipe->delete_fs_state(pipe, ctx->fs1da);
    pipe->delete_fs_state(pipe, ctx->fsCube);
    pipe->delete_fs_state(pipe, ctx->fs3d);
    pipe->delete_fs_state(pipe, ctx->fs2d);
@@ -1499,7 +1523,11 @@ util_gen_mipmap(struct gen_mipmap_state *ctx,
       fs = ctx->fsCube;
       break;
    case PIPE_TEXTURE_1D_ARRAY:
+      fs = ctx->fs1da;
+      break;
    case PIPE_TEXTURE_2D_ARRAY:
+      fs = ctx->fs2da;
+      break;
    default:
       assert(0);
       fs = ctx->fs2d;
@@ -1555,6 +1583,8 @@ util_gen_mipmap(struct gen_mipmap_state *ctx,
 
       if (pt->target == PIPE_TEXTURE_3D)
          nr_layers = u_minify(pt->depth0, dstLevel);
+      else if (pt->target == PIPE_TEXTURE_2D_ARRAY || pt->target == PIPE_TEXTURE_1D_ARRAY)
+	 nr_layers = pt->array_size;
       else
          nr_layers = 1;
 
@@ -1564,11 +1594,12 @@ util_gen_mipmap(struct gen_mipmap_state *ctx,
             /* in theory with geom shaders and driver with full layer support
                could do that in one go. */
             layer = i;
-            offset = 1.0f / (float)(nr_layers * 2);
             /* XXX hmm really? */
             rcoord = (float)layer / (float)nr_layers + 1.0f / (float)(nr_layers * 2);
-         }
-         else
+         } else if (pt->target == PIPE_TEXTURE_2D_ARRAY || pt->target == PIPE_TEXTURE_1D_ARRAY) {
+	    layer = i;
+	    rcoord = (float)layer;
+	 } else
             layer = face;
 
          memset(&surf_templ, 0, sizeof(surf_templ));