1f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/* 2f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Copyright © 2010 Intel Corporation 3f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 4f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Permission is hereby granted, free of charge, to any person obtaining a 5f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * copy of this software and associated documentation files (the "Software"), 6f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * to deal in the Software without restriction, including without limitation 7f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * and/or sell copies of the Software, and to permit persons to whom the 9f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Software is furnished to do so, subject to the following conditions: 10f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 11f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * The above copyright notice and this permission notice (including the next 12f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * paragraph) shall be included in all copies or substantial portions of the 13f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Software. 14f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 15f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * DEALINGS IN THE SOFTWARE. 22f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 23f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 24f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/** 25f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * \file lower_texture_projection.cpp 26f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 27f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * IR lower pass to perform the division of texture coordinates by the texture 28f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * projector if present. 29f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 30f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Many GPUs have a texture sampling opcode that takes the projector 31f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * and does the divide internally, thus the presence of the projector 32f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * in the IR. For GPUs that don't, this saves the driver needing the 33f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * logic for handling the divide. 34f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 35f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * \author Eric Anholt <eric@anholt.net> 36f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 37f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 38f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include "ir.h" 39f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 40f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgclass lower_texture_projection_visitor : public ir_hierarchical_visitor { 41f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgpublic: 42f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org lower_texture_projection_visitor() 43f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org { 44f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org progress = false; 45f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 46f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 47f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ir_visitor_status visit_leave(ir_texture *ir); 48f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 49f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org bool progress; 50f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org}; 51f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 52f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgir_visitor_status 53f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orglower_texture_projection_visitor::visit_leave(ir_texture *ir) 54f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 55f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (!ir->projector) 56f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return visit_continue; 57f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 58f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org void *mem_ctx = ralloc_parent(ir); 59f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 60f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ir_variable *var = new(mem_ctx) ir_variable(ir->projector->type, 61f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org "projector", ir_var_auto); 62f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org base_ir->insert_before(var); 63f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ir_dereference *deref = new(mem_ctx) ir_dereference_variable(var); 64f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ir_expression *expr = new(mem_ctx) ir_expression(ir_unop_rcp, 65f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ir->projector->type, 66f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ir->projector, 67f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org NULL); 68f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ir_assignment *assign = new(mem_ctx) ir_assignment(deref, expr, NULL); 69f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org base_ir->insert_before(assign); 70f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 71f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org deref = new(mem_ctx) ir_dereference_variable(var); 72f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ir->coordinate = new(mem_ctx) ir_expression(ir_binop_mul, 73f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ir->coordinate->type, 74f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ir->coordinate, 75f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org deref); 76f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 77f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (ir->shadow_comparitor) { 78f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org deref = new(mem_ctx) ir_dereference_variable(var); 79f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ir->shadow_comparitor = new(mem_ctx) ir_expression(ir_binop_mul, 80f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ir->shadow_comparitor->type, 81f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ir->shadow_comparitor, 82f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org deref); 83f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 84f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 85f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ir->projector = NULL; 86f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 87f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org progress = true; 88f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return visit_continue; 89f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 90f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 91f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgbool 92f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgdo_lower_texture_projection(exec_list *instructions) 93f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 94f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org lower_texture_projection_visitor v; 95f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 96f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org visit_list_elements(&v, instructions); 97f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 98f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return v.progress; 99f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 100