| /* |
| * Copyright © 2010 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| */ |
| |
| /** |
| * \file brw_cubemap_normalize.cpp |
| * |
| * IR lower pass to perform the normalization of the cubemap coordinates to |
| * have the largest magnitude component be -1.0 or 1.0. |
| * |
| * \author Eric Anholt <eric@anholt.net> |
| */ |
| |
| #include "compiler/glsl_types.h" |
| #include "compiler/glsl/ir.h" |
| #include "program/prog_instruction.h" /* For WRITEMASK_* */ |
| |
| class brw_cubemap_normalize_visitor : public ir_hierarchical_visitor { |
| public: |
| brw_cubemap_normalize_visitor() |
| { |
| progress = false; |
| } |
| |
| ir_visitor_status visit_leave(ir_texture *ir); |
| |
| bool progress; |
| }; |
| |
| ir_visitor_status |
| brw_cubemap_normalize_visitor::visit_leave(ir_texture *ir) |
| { |
| if (ir->sampler->type->sampler_dimensionality != GLSL_SAMPLER_DIM_CUBE) |
| return visit_continue; |
| |
| if (!ir->coordinate) |
| return visit_continue; |
| |
| void *mem_ctx = ralloc_parent(ir); |
| |
| ir_variable *var = new(mem_ctx) ir_variable(ir->coordinate->type, |
| "coordinate", ir_var_auto); |
| base_ir->insert_before(var); |
| ir_dereference *deref = new(mem_ctx) ir_dereference_variable(var); |
| ir_assignment *assign = new(mem_ctx) ir_assignment(deref, ir->coordinate, |
| NULL); |
| base_ir->insert_before(assign); |
| |
| deref = new(mem_ctx) ir_dereference_variable(var); |
| ir_rvalue *swiz0 = new(mem_ctx) ir_swizzle(deref, 0, 0, 0, 0, 1); |
| deref = new(mem_ctx) ir_dereference_variable(var); |
| ir_rvalue *swiz1 = new(mem_ctx) ir_swizzle(deref, 1, 0, 0, 0, 1); |
| deref = new(mem_ctx) ir_dereference_variable(var); |
| ir_rvalue *swiz2 = new(mem_ctx) ir_swizzle(deref, 2, 0, 0, 0, 1); |
| |
| swiz0 = new(mem_ctx) ir_expression(ir_unop_abs, swiz0->type, swiz0, NULL); |
| swiz1 = new(mem_ctx) ir_expression(ir_unop_abs, swiz1->type, swiz1, NULL); |
| swiz2 = new(mem_ctx) ir_expression(ir_unop_abs, swiz2->type, swiz2, NULL); |
| |
| ir_expression *expr; |
| expr = new(mem_ctx) ir_expression(ir_binop_max, |
| glsl_type::float_type, |
| swiz0, swiz1); |
| |
| expr = new(mem_ctx) ir_expression(ir_binop_max, |
| glsl_type::float_type, |
| expr, swiz2); |
| |
| expr = new(mem_ctx) ir_expression(ir_unop_rcp, |
| glsl_type::float_type, |
| expr, NULL); |
| |
| /* coordinate.xyz *= expr */ |
| assign = new(mem_ctx) ir_assignment( |
| new(mem_ctx) ir_dereference_variable(var), |
| new(mem_ctx) ir_swizzle( |
| new(mem_ctx) ir_expression(ir_binop_mul, |
| ir->coordinate->type, |
| new(mem_ctx) ir_dereference_variable(var), |
| expr), |
| 0, 1, 2, 0, 3)); |
| assign->write_mask = WRITEMASK_XYZ; |
| base_ir->insert_before(assign); |
| ir->coordinate = new(mem_ctx) ir_dereference_variable(var); |
| |
| progress = true; |
| return visit_continue; |
| } |
| |
| extern "C" { |
| |
| bool |
| brw_do_cubemap_normalize(exec_list *instructions) |
| { |
| brw_cubemap_normalize_visitor v; |
| |
| visit_list_elements(&v, instructions); |
| |
| return v.progress; |
| } |
| |
| } |