st/mesa: add support for ARB_texture_cube_map_array (v2)

This adds mesa state tracker support for the new extension,
along with glsl->tgsi conversion to use the new opcodes
where appropriate.

v2: fix assert found running textureSize tests.

Reviewed-by: Brian Paul <brianp@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/mesa/state_tracker/st_cb_texture.c

@@ -102,6 +102,9 @@ gl_target_to_pipe(GLenum target)
       return PIPE_TEXTURE_2D_ARRAY;
    case GL_TEXTURE_BUFFER:
       return PIPE_BUFFER;
+   case GL_TEXTURE_CUBE_MAP_ARRAY:
+   case GL_PROXY_TEXTURE_CUBE_MAP_ARRAY:
+      return PIPE_TEXTURE_CUBE_ARRAY;
    default:
       assert(0);
       return 0;
@@ -272,6 +275,7 @@ get_texture_dims(GLenum target)
    case GL_TEXTURE_EXTERNAL_OES:
       return 2;
    case GL_TEXTURE_3D:
+   case GL_TEXTURE_CUBE_MAP_ARRAY:
       return 3;
    default:
       assert(0 && "invalid texture target in get_texture_dims()");
@@ -1123,6 +1127,7 @@ copy_image_data_to_texture(struct st_context *st,
       assert(stImage->pt->target == PIPE_TEXTURE_1D_ARRAY ||
              u_minify(stImage->pt->height0, src_level) == stImage->base.Height);
       assert(stImage->pt->target == PIPE_TEXTURE_2D_ARRAY ||
+             stImage->pt->target == PIPE_TEXTURE_CUBE_ARRAY ||
              u_minify(stImage->pt->depth0, src_level) == stImage->base.Depth);
 
       st_texture_image_copy(st->pipe,

src/mesa/state_tracker/st_extensions.c

@@ -378,7 +378,8 @@ void st_init_extensions(struct st_context *st)
        * support the GL_POINT_SPRITE_R_MODE_NV option. */
       { o(MESA_texture_array),               PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS         },
 
-      { o(OES_standard_derivatives),         PIPE_CAP_SM3                              }
+      { o(OES_standard_derivatives),         PIPE_CAP_SM3                              },
+      { o(ARB_texture_cube_map_array),       PIPE_CAP_CUBE_MAP_ARRAY                   }
    };
 
    /* Required: render target and sampler support */

src/mesa/state_tracker/st_glsl_to_tgsi.cpp

@@ -2565,10 +2565,18 @@ glsl_to_tgsi_visitor::visit(ir_call *ir)
 void
 glsl_to_tgsi_visitor::visit(ir_texture *ir)
 {
-   st_src_reg result_src, coord, lod_info, projector, dx, dy, offset;
+   st_src_reg result_src, coord, cube_sc, lod_info, projector, dx, dy, offset;
-   st_dst_reg result_dst, coord_dst;
+   st_dst_reg result_dst, coord_dst, cube_sc_dst;
    glsl_to_tgsi_instruction *inst = NULL;
    unsigned opcode = TGSI_OPCODE_NOP;
+   const glsl_type *sampler_type = ir->sampler->type;
+   bool is_cube_array = false;
+
+   /* if we are a cube array sampler */
+   if ((sampler_type->sampler_dimensionality == GLSL_SAMPLER_DIM_CUBE &&
+        sampler_type->sampler_array)) {
+      is_cube_array = true;
+   }
 
    if (ir->coordinate) {
       ir->coordinate->accept(this);
@@ -2596,15 +2604,15 @@ glsl_to_tgsi_visitor::visit(ir_texture *ir)
 
    switch (ir->op) {
    case ir_tex:
-      opcode = TGSI_OPCODE_TEX;
+      opcode = (is_cube_array && ir->shadow_comparitor) ? TGSI_OPCODE_TEX2 : TGSI_OPCODE_TEX; 
       break;
    case ir_txb:
-      opcode = TGSI_OPCODE_TXB;
+      opcode = is_cube_array ? TGSI_OPCODE_TXB2 : TGSI_OPCODE_TXB;
       ir->lod_info.bias->accept(this);
       lod_info = this->result;
       break;
    case ir_txl:
-      opcode = TGSI_OPCODE_TXL;
+      opcode = is_cube_array ? TGSI_OPCODE_TXL2 : TGSI_OPCODE_TXL;
       ir->lod_info.lod->accept(this);
       lod_info = this->result;
       break;
@@ -2631,8 +2639,6 @@ glsl_to_tgsi_visitor::visit(ir_texture *ir)
       break;
    }
 
-   const glsl_type *sampler_type = ir->sampler->type;
-
    if (ir->projector) {
       if (opcode == TGSI_OPCODE_TEX) {
          /* Slot the projector in as the last component of the coord. */
@@ -2692,7 +2698,14 @@ glsl_to_tgsi_visitor::visit(ir_texture *ir)
        */
       ir->shadow_comparitor->accept(this);
 
-      /* XXX This will need to be updated for cubemap array samplers. */
+      if (is_cube_array) {
+         cube_sc = get_temp(glsl_type::float_type);
+         cube_sc_dst = st_dst_reg(cube_sc);
+         cube_sc_dst.writemask = WRITEMASK_X;
+         emit(ir, TGSI_OPCODE_MOV, cube_sc_dst, this->result);
+         cube_sc_dst.writemask = WRITEMASK_X;
+      }
+      else {
          if ((sampler_type->sampler_dimensionality == GLSL_SAMPLER_DIM_2D &&
               sampler_type->sampler_array) ||
              sampler_type->sampler_dimensionality == GLSL_SAMPLER_DIM_CUBE) {
@@ -2704,6 +2717,7 @@ glsl_to_tgsi_visitor::visit(ir_texture *ir)
          emit(ir, TGSI_OPCODE_MOV, coord_dst, this->result);
          coord_dst.writemask = WRITEMASK_XYZW;
       }
+   }
 
    if (opcode == TGSI_OPCODE_TXL || opcode == TGSI_OPCODE_TXB ||
        opcode == TGSI_OPCODE_TXF) {
@@ -2719,6 +2733,10 @@ glsl_to_tgsi_visitor::visit(ir_texture *ir)
       inst = emit(ir, opcode, result_dst, lod_info);
    else if (opcode == TGSI_OPCODE_TXF) {
       inst = emit(ir, opcode, result_dst, coord);
+   } else if (opcode == TGSI_OPCODE_TXL2 || opcode == TGSI_OPCODE_TXB2) {
+      inst = emit(ir, opcode, result_dst, coord, lod_info);
+   } else if (opcode == TGSI_OPCODE_TEX2) {
+      inst = emit(ir, opcode, result_dst, coord, cube_sc);
    } else 
       inst = emit(ir, opcode, result_dst, coord);
 
@@ -2751,7 +2769,8 @@ glsl_to_tgsi_visitor::visit(ir_texture *ir)
       inst->tex_target = TEXTURE_3D_INDEX;
       break;
    case GLSL_SAMPLER_DIM_CUBE:
-      inst->tex_target = TEXTURE_CUBE_INDEX;
+      inst->tex_target = (sampler_type->sampler_array)
+         ? TEXTURE_CUBE_ARRAY_INDEX : TEXTURE_CUBE_INDEX;
       break;
    case GLSL_SAMPLER_DIM_RECT:
       inst->tex_target = TEXTURE_RECT_INDEX;
@@ -4209,6 +4228,7 @@ compile_tgsi_instruction(struct st_translate *t,
 
    unsigned num_dst;
    unsigned num_src;
+   unsigned tex_target;
 
    num_dst = num_inst_dst_regs(inst->op);
    num_src = num_inst_src_regs(inst->op);
@@ -4243,14 +4263,19 @@ compile_tgsi_instruction(struct st_translate *t,
    case TGSI_OPCODE_TXP:
    case TGSI_OPCODE_TXQ:
    case TGSI_OPCODE_TXF:
+   case TGSI_OPCODE_TEX2:
+   case TGSI_OPCODE_TXB2:
+   case TGSI_OPCODE_TXL2:
       src[num_src++] = t->samplers[inst->sampler];
       for (i = 0; i < inst->tex_offset_num_offset; i++) {
          texoffsets[i] = translate_tex_offset(t, &inst->tex_offsets[i]);
       }
+      tex_target = st_translate_texture_target(inst->tex_target, inst->tex_shadow);
+
       ureg_tex_insn(ureg,
                     inst->op,
                     dst, num_dst,
-                    st_translate_texture_target(inst->tex_target, inst->tex_shadow),
+                    tex_target,
                     texoffsets, inst->tex_offset_num_offset,
                     src, num_src);
       return;

src/mesa/state_tracker/st_mesa_to_tgsi.c

@@ -263,6 +263,7 @@ st_translate_texture_target( GLuint textarget,
       case TEXTURE_1D_ARRAY_INDEX: return TGSI_TEXTURE_SHADOW1D_ARRAY;
       case TEXTURE_2D_ARRAY_INDEX: return TGSI_TEXTURE_SHADOW2D_ARRAY;
       case TEXTURE_CUBE_INDEX: return TGSI_TEXTURE_SHADOWCUBE;
+      case TEXTURE_CUBE_ARRAY_INDEX: return TGSI_TEXTURE_SHADOWCUBE_ARRAY;
       default: break;
       }
    }
@@ -272,6 +273,7 @@ st_translate_texture_target( GLuint textarget,
    case TEXTURE_2D_INDEX:   return TGSI_TEXTURE_2D;
    case TEXTURE_3D_INDEX:   return TGSI_TEXTURE_3D;
    case TEXTURE_CUBE_INDEX: return TGSI_TEXTURE_CUBE;
+   case TEXTURE_CUBE_ARRAY_INDEX: return TGSI_TEXTURE_CUBE_ARRAY;
    case TEXTURE_RECT_INDEX: return TGSI_TEXTURE_RECT;
    case TEXTURE_1D_ARRAY_INDEX:   return TGSI_TEXTURE_1D_ARRAY;
    case TEXTURE_2D_ARRAY_INDEX:   return TGSI_TEXTURE_2D_ARRAY;

src/mesa/state_tracker/st_texture.c

@@ -165,6 +165,13 @@ st_gl_texture_dims_to_pipe_dims(GLenum texture,
       *depthOut = 1;
       *layersOut = depthIn;
       break;
+   case GL_TEXTURE_CUBE_MAP_ARRAY:
+   case GL_PROXY_TEXTURE_CUBE_MAP_ARRAY:
+      *widthOut = widthIn;
+      *heightOut = heightIn;
+      *depthOut = 1;
+      *layersOut = depthIn;
+      break;
    default:
       assert(0 && "Unexpected texture in st_gl_texture_dims_to_pipe_dims()");
       /* fall-through */
@@ -277,7 +284,8 @@ st_texture_image_data(struct st_context *st,
    GLuint layers;
 
    if (dst->target == PIPE_TEXTURE_1D_ARRAY ||
-       dst->target == PIPE_TEXTURE_2D_ARRAY)
+       dst->target == PIPE_TEXTURE_2D_ARRAY ||
+       dst->target == PIPE_TEXTURE_CUBE_ARRAY)
       layers = dst->array_size;
    else
       layers = u_minify(dst->depth0, level);