1 /* 2 * Copyright 2015 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21 * IN THE SOFTWARE. 22 */ 23 24 #include "brw_shader.h" 25 #include "brw_nir.h" 26 #include "compiler/glsl/ir_uniform.h" 27 28 static void 29 brw_nir_setup_glsl_builtin_uniform(nir_variable *var, 30 const struct gl_program *prog, 31 struct brw_stage_prog_data *stage_prog_data, 32 bool is_scalar) 33 { 34 const nir_state_slot *const slots = var->state_slots; 35 assert(var->state_slots != NULL); 36 37 unsigned uniform_index = var->data.driver_location / 4; 38 for (unsigned int i = 0; i < var->num_state_slots; i++) { 39 /* This state reference has already been setup by ir_to_mesa, but we'll 40 * get the same index back here. 41 */ 42 int index = _mesa_add_state_reference(prog->Parameters, 43 (gl_state_index *)slots[i].tokens); 44 45 /* Add each of the unique swizzles of the element as a parameter. 46 * This'll end up matching the expected layout of the 47 * array/matrix/structure we're trying to fill in. 48 */ 49 int last_swiz = -1; 50 for (unsigned j = 0; j < 4; j++) { 51 int swiz = GET_SWZ(slots[i].swizzle, j); 52 53 /* If we hit a pair of identical swizzles, this means we've hit the 54 * end of the builtin variable. In scalar mode, we should just quit 55 * and move on to the next one. In vec4, we need to continue and pad 56 * it out to 4 components. 57 */ 58 if (swiz == last_swiz && is_scalar) 59 break; 60 61 last_swiz = swiz; 62 63 stage_prog_data->param[uniform_index++] = 64 &prog->Parameters->ParameterValues[index][swiz]; 65 } 66 } 67 } 68 69 static void 70 brw_nir_setup_glsl_uniform(gl_shader_stage stage, nir_variable *var, 71 const struct gl_program *prog, 72 struct brw_stage_prog_data *stage_prog_data, 73 bool is_scalar) 74 { 75 int namelen = strlen(var->name); 76 77 /* The data for our (non-builtin) uniforms is stored in a series of 78 * gl_uniform_storage structs for each subcomponent that 79 * glGetUniformLocation() could name. We know it's been set up in the same 80 * order we'd walk the type, so walk the list of storage and find anything 81 * with our name, or the prefix of a component that starts with our name. 82 */ 83 unsigned uniform_index = var->data.driver_location / 4; 84 for (unsigned u = 0; u < prog->sh.data->NumUniformStorage; u++) { 85 struct gl_uniform_storage *storage = 86 &prog->sh.data->UniformStorage[u]; 87 88 if (storage->builtin) 89 continue; 90 91 if (strncmp(var->name, storage->name, namelen) != 0 || 92 (storage->name[namelen] != 0 && 93 storage->name[namelen] != '.' && 94 storage->name[namelen] != '[')) { 95 continue; 96 } 97 98 if (storage->type->is_image()) { 99 brw_setup_image_uniform_values(stage, stage_prog_data, 100 uniform_index, storage); 101 uniform_index += 102 BRW_IMAGE_PARAM_SIZE * MAX2(storage->array_elements, 1); 103 } else { 104 gl_constant_value *components = storage->storage; 105 unsigned vector_count = (MAX2(storage->array_elements, 1) * 106 storage->type->matrix_columns); 107 unsigned vector_size = storage->type->vector_elements; 108 unsigned max_vector_size = 4; 109 if (storage->type->base_type == GLSL_TYPE_DOUBLE) { 110 vector_size *= 2; 111 if (vector_size > 4) 112 max_vector_size = 8; 113 } 114 115 for (unsigned s = 0; s < vector_count; s++) { 116 unsigned i; 117 for (i = 0; i < vector_size; i++) { 118 stage_prog_data->param[uniform_index++] = components++; 119 } 120 121 if (!is_scalar) { 122 /* Pad out with zeros if needed (only needed for vec4) */ 123 for (; i < max_vector_size; i++) { 124 static const gl_constant_value zero = { 0.0 }; 125 stage_prog_data->param[uniform_index++] = &zero; 126 } 127 } 128 } 129 } 130 } 131 } 132 133 void 134 brw_nir_setup_glsl_uniforms(nir_shader *shader, const struct gl_program *prog, 135 struct brw_stage_prog_data *stage_prog_data, 136 bool is_scalar) 137 { 138 nir_foreach_variable(var, &shader->uniforms) { 139 /* UBO's, atomics and samplers don't take up space in the 140 uniform file */ 141 if (var->interface_type != NULL || var->type->contains_atomic()) 142 continue; 143 144 if (strncmp(var->name, "gl_", 3) == 0) { 145 brw_nir_setup_glsl_builtin_uniform(var, prog, stage_prog_data, 146 is_scalar); 147 } else { 148 brw_nir_setup_glsl_uniform(shader->stage, var, prog, stage_prog_data, 149 is_scalar); 150 } 151 } 152 } 153 154 void 155 brw_nir_setup_arb_uniforms(nir_shader *shader, struct gl_program *prog, 156 struct brw_stage_prog_data *stage_prog_data) 157 { 158 struct gl_program_parameter_list *plist = prog->Parameters; 159 160 /* For ARB programs, prog_to_nir generates a single "parameters" variable 161 * for all uniform data. nir_lower_wpos_ytransform may also create an 162 * additional variable. 163 */ 164 assert(shader->uniforms.length() <= 2); 165 166 for (unsigned p = 0; p < plist->NumParameters; p++) { 167 /* Parameters should be either vec4 uniforms or single component 168 * constants; matrices and other larger types should have been broken 169 * down earlier. 170 */ 171 assert(plist->Parameters[p].Size <= 4); 172 173 unsigned i; 174 for (i = 0; i < plist->Parameters[p].Size; i++) { 175 stage_prog_data->param[4 * p + i] = &plist->ParameterValues[p][i]; 176 } 177 for (; i < 4; i++) { 178 static const gl_constant_value zero = { 0.0 }; 179 stage_prog_data->param[4 * p + i] = &zero; 180 } 181 } 182 } 183
