1 /* 2 * Copyright 2014 Advanced Micro Devices, Inc. 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 FROM, 20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 * SOFTWARE. 22 * 23 * Authors: Marek Olk <maraeo (at) gmail.com> 24 * 25 */ 26 27 #include "r600_cs.h" 28 29 /* 2xMSAA 30 * There are two locations (4, 4), (-4, -4). */ 31 const uint32_t eg_sample_locs_2x[4] = { 32 FILL_SREG(4, 4, -4, -4, 4, 4, -4, -4), 33 FILL_SREG(4, 4, -4, -4, 4, 4, -4, -4), 34 FILL_SREG(4, 4, -4, -4, 4, 4, -4, -4), 35 FILL_SREG(4, 4, -4, -4, 4, 4, -4, -4), 36 }; 37 const unsigned eg_max_dist_2x = 4; 38 /* 4xMSAA 39 * There are 4 locations: (-2, 6), (6, -2), (-6, 2), (2, 6). */ 40 const uint32_t eg_sample_locs_4x[4] = { 41 FILL_SREG(-2, -6, 6, -2, -6, 2, 2, 6), 42 FILL_SREG(-2, -6, 6, -2, -6, 2, 2, 6), 43 FILL_SREG(-2, -6, 6, -2, -6, 2, 2, 6), 44 FILL_SREG(-2, -6, 6, -2, -6, 2, 2, 6), 45 }; 46 const unsigned eg_max_dist_4x = 6; 47 48 /* Cayman 8xMSAA */ 49 static const uint32_t cm_sample_locs_8x[] = { 50 FILL_SREG( 1, -3, -1, 3, 5, 1, -3, -5), 51 FILL_SREG( 1, -3, -1, 3, 5, 1, -3, -5), 52 FILL_SREG( 1, -3, -1, 3, 5, 1, -3, -5), 53 FILL_SREG( 1, -3, -1, 3, 5, 1, -3, -5), 54 FILL_SREG(-5, 5, -7, -1, 3, 7, 7, -7), 55 FILL_SREG(-5, 5, -7, -1, 3, 7, 7, -7), 56 FILL_SREG(-5, 5, -7, -1, 3, 7, 7, -7), 57 FILL_SREG(-5, 5, -7, -1, 3, 7, 7, -7), 58 }; 59 static const unsigned cm_max_dist_8x = 8; 60 /* Cayman 16xMSAA */ 61 static const uint32_t cm_sample_locs_16x[] = { 62 FILL_SREG( 1, 1, -1, -3, -3, 2, 4, -1), 63 FILL_SREG( 1, 1, -1, -3, -3, 2, 4, -1), 64 FILL_SREG( 1, 1, -1, -3, -3, 2, 4, -1), 65 FILL_SREG( 1, 1, -1, -3, -3, 2, 4, -1), 66 FILL_SREG(-5, -2, 2, 5, 5, 3, 3, -5), 67 FILL_SREG(-5, -2, 2, 5, 5, 3, 3, -5), 68 FILL_SREG(-5, -2, 2, 5, 5, 3, 3, -5), 69 FILL_SREG(-5, -2, 2, 5, 5, 3, 3, -5), 70 FILL_SREG(-2, 6, 0, -7, -4, -6, -6, 4), 71 FILL_SREG(-2, 6, 0, -7, -4, -6, -6, 4), 72 FILL_SREG(-2, 6, 0, -7, -4, -6, -6, 4), 73 FILL_SREG(-2, 6, 0, -7, -4, -6, -6, 4), 74 FILL_SREG(-8, 0, 7, -4, 6, 7, -7, -8), 75 FILL_SREG(-8, 0, 7, -4, 6, 7, -7, -8), 76 FILL_SREG(-8, 0, 7, -4, 6, 7, -7, -8), 77 FILL_SREG(-8, 0, 7, -4, 6, 7, -7, -8), 78 }; 79 static const unsigned cm_max_dist_16x = 8; 80 81 void cayman_get_sample_position(struct pipe_context *ctx, unsigned sample_count, 82 unsigned sample_index, float *out_value) 83 { 84 int offset, index; 85 struct { 86 int idx:4; 87 } val; 88 switch (sample_count) { 89 case 1: 90 default: 91 out_value[0] = out_value[1] = 0.5; 92 break; 93 case 2: 94 offset = 4 * (sample_index * 2); 95 val.idx = (eg_sample_locs_2x[0] >> offset) & 0xf; 96 out_value[0] = (float)(val.idx + 8) / 16.0f; 97 val.idx = (eg_sample_locs_2x[0] >> (offset + 4)) & 0xf; 98 out_value[1] = (float)(val.idx + 8) / 16.0f; 99 break; 100 case 4: 101 offset = 4 * (sample_index * 2); 102 val.idx = (eg_sample_locs_4x[0] >> offset) & 0xf; 103 out_value[0] = (float)(val.idx + 8) / 16.0f; 104 val.idx = (eg_sample_locs_4x[0] >> (offset + 4)) & 0xf; 105 out_value[1] = (float)(val.idx + 8) / 16.0f; 106 break; 107 case 8: 108 offset = 4 * (sample_index % 4 * 2); 109 index = (sample_index / 4) * 4; 110 val.idx = (cm_sample_locs_8x[index] >> offset) & 0xf; 111 out_value[0] = (float)(val.idx + 8) / 16.0f; 112 val.idx = (cm_sample_locs_8x[index] >> (offset + 4)) & 0xf; 113 out_value[1] = (float)(val.idx + 8) / 16.0f; 114 break; 115 case 16: 116 offset = 4 * (sample_index % 4 * 2); 117 index = (sample_index / 4) * 4; 118 val.idx = (cm_sample_locs_16x[index] >> offset) & 0xf; 119 out_value[0] = (float)(val.idx + 8) / 16.0f; 120 val.idx = (cm_sample_locs_16x[index] >> (offset + 4)) & 0xf; 121 out_value[1] = (float)(val.idx + 8) / 16.0f; 122 break; 123 } 124 } 125 126 void cayman_init_msaa(struct pipe_context *ctx) 127 { 128 struct r600_common_context *rctx = (struct r600_common_context*)ctx; 129 int i; 130 131 cayman_get_sample_position(ctx, 1, 0, rctx->sample_locations_1x[0]); 132 133 for (i = 0; i < 2; i++) 134 cayman_get_sample_position(ctx, 2, i, rctx->sample_locations_2x[i]); 135 for (i = 0; i < 4; i++) 136 cayman_get_sample_position(ctx, 4, i, rctx->sample_locations_4x[i]); 137 for (i = 0; i < 8; i++) 138 cayman_get_sample_position(ctx, 8, i, rctx->sample_locations_8x[i]); 139 for (i = 0; i < 16; i++) 140 cayman_get_sample_position(ctx, 16, i, rctx->sample_locations_16x[i]); 141 } 142 143 void cayman_emit_msaa_sample_locs(struct radeon_winsys_cs *cs, int nr_samples) 144 { 145 switch (nr_samples) { 146 default: 147 case 1: 148 radeon_set_context_reg(cs, CM_R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, 0); 149 radeon_set_context_reg(cs, CM_R_028C08_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y0_0, 0); 150 radeon_set_context_reg(cs, CM_R_028C18_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y1_0, 0); 151 radeon_set_context_reg(cs, CM_R_028C28_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y1_0, 0); 152 break; 153 case 2: 154 radeon_set_context_reg(cs, CM_R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, eg_sample_locs_2x[0]); 155 radeon_set_context_reg(cs, CM_R_028C08_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y0_0, eg_sample_locs_2x[1]); 156 radeon_set_context_reg(cs, CM_R_028C18_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y1_0, eg_sample_locs_2x[2]); 157 radeon_set_context_reg(cs, CM_R_028C28_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y1_0, eg_sample_locs_2x[3]); 158 break; 159 case 4: 160 radeon_set_context_reg(cs, CM_R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, eg_sample_locs_4x[0]); 161 radeon_set_context_reg(cs, CM_R_028C08_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y0_0, eg_sample_locs_4x[1]); 162 radeon_set_context_reg(cs, CM_R_028C18_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y1_0, eg_sample_locs_4x[2]); 163 radeon_set_context_reg(cs, CM_R_028C28_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y1_0, eg_sample_locs_4x[3]); 164 break; 165 case 8: 166 radeon_set_context_reg_seq(cs, CM_R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, 14); 167 radeon_emit(cs, cm_sample_locs_8x[0]); 168 radeon_emit(cs, cm_sample_locs_8x[4]); 169 radeon_emit(cs, 0); 170 radeon_emit(cs, 0); 171 radeon_emit(cs, cm_sample_locs_8x[1]); 172 radeon_emit(cs, cm_sample_locs_8x[5]); 173 radeon_emit(cs, 0); 174 radeon_emit(cs, 0); 175 radeon_emit(cs, cm_sample_locs_8x[2]); 176 radeon_emit(cs, cm_sample_locs_8x[6]); 177 radeon_emit(cs, 0); 178 radeon_emit(cs, 0); 179 radeon_emit(cs, cm_sample_locs_8x[3]); 180 radeon_emit(cs, cm_sample_locs_8x[7]); 181 break; 182 case 16: 183 radeon_set_context_reg_seq(cs, CM_R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, 16); 184 radeon_emit(cs, cm_sample_locs_16x[0]); 185 radeon_emit(cs, cm_sample_locs_16x[4]); 186 radeon_emit(cs, cm_sample_locs_16x[8]); 187 radeon_emit(cs, cm_sample_locs_16x[12]); 188 radeon_emit(cs, cm_sample_locs_16x[1]); 189 radeon_emit(cs, cm_sample_locs_16x[5]); 190 radeon_emit(cs, cm_sample_locs_16x[9]); 191 radeon_emit(cs, cm_sample_locs_16x[13]); 192 radeon_emit(cs, cm_sample_locs_16x[2]); 193 radeon_emit(cs, cm_sample_locs_16x[6]); 194 radeon_emit(cs, cm_sample_locs_16x[10]); 195 radeon_emit(cs, cm_sample_locs_16x[14]); 196 radeon_emit(cs, cm_sample_locs_16x[3]); 197 radeon_emit(cs, cm_sample_locs_16x[7]); 198 radeon_emit(cs, cm_sample_locs_16x[11]); 199 radeon_emit(cs, cm_sample_locs_16x[15]); 200 break; 201 } 202 } 203 204 void cayman_emit_msaa_config(struct radeon_winsys_cs *cs, int nr_samples, 205 int ps_iter_samples, int overrast_samples, 206 unsigned sc_mode_cntl_1) 207 { 208 int setup_samples = nr_samples > 1 ? nr_samples : 209 overrast_samples > 1 ? overrast_samples : 0; 210 /* Required by OpenGL line rasterization. 211 * 212 * TODO: We should also enable perpendicular endcaps for AA lines, 213 * but that requires implementing line stippling in the pixel 214 * shader. SC can only do line stippling with axis-aligned 215 * endcaps. 216 */ 217 unsigned sc_line_cntl = S_028BDC_DX10_DIAMOND_TEST_ENA(1); 218 219 if (setup_samples > 1) { 220 /* indexed by log2(nr_samples) */ 221 unsigned max_dist[] = { 222 0, 223 eg_max_dist_2x, 224 eg_max_dist_4x, 225 cm_max_dist_8x, 226 cm_max_dist_16x 227 }; 228 unsigned log_samples = util_logbase2(setup_samples); 229 unsigned log_ps_iter_samples = 230 util_logbase2(util_next_power_of_two(ps_iter_samples)); 231 232 radeon_set_context_reg_seq(cs, CM_R_028BDC_PA_SC_LINE_CNTL, 2); 233 radeon_emit(cs, sc_line_cntl | 234 S_028BDC_EXPAND_LINE_WIDTH(1)); /* CM_R_028BDC_PA_SC_LINE_CNTL */ 235 radeon_emit(cs, S_028BE0_MSAA_NUM_SAMPLES(log_samples) | 236 S_028BE0_MAX_SAMPLE_DIST(max_dist[log_samples]) | 237 S_028BE0_MSAA_EXPOSED_SAMPLES(log_samples)); /* CM_R_028BE0_PA_SC_AA_CONFIG */ 238 239 if (nr_samples > 1) { 240 radeon_set_context_reg(cs, CM_R_028804_DB_EQAA, 241 S_028804_MAX_ANCHOR_SAMPLES(log_samples) | 242 S_028804_PS_ITER_SAMPLES(log_ps_iter_samples) | 243 S_028804_MASK_EXPORT_NUM_SAMPLES(log_samples) | 244 S_028804_ALPHA_TO_MASK_NUM_SAMPLES(log_samples) | 245 S_028804_HIGH_QUALITY_INTERSECTIONS(1) | 246 S_028804_STATIC_ANCHOR_ASSOCIATIONS(1)); 247 radeon_set_context_reg(cs, EG_R_028A4C_PA_SC_MODE_CNTL_1, 248 EG_S_028A4C_PS_ITER_SAMPLE(ps_iter_samples > 1) | 249 sc_mode_cntl_1); 250 } else if (overrast_samples > 1) { 251 radeon_set_context_reg(cs, CM_R_028804_DB_EQAA, 252 S_028804_HIGH_QUALITY_INTERSECTIONS(1) | 253 S_028804_STATIC_ANCHOR_ASSOCIATIONS(1) | 254 S_028804_OVERRASTERIZATION_AMOUNT(log_samples)); 255 radeon_set_context_reg(cs, EG_R_028A4C_PA_SC_MODE_CNTL_1, 256 sc_mode_cntl_1); 257 } 258 } else { 259 radeon_set_context_reg_seq(cs, CM_R_028BDC_PA_SC_LINE_CNTL, 2); 260 radeon_emit(cs, sc_line_cntl); /* CM_R_028BDC_PA_SC_LINE_CNTL */ 261 radeon_emit(cs, 0); /* CM_R_028BE0_PA_SC_AA_CONFIG */ 262 263 radeon_set_context_reg(cs, CM_R_028804_DB_EQAA, 264 S_028804_HIGH_QUALITY_INTERSECTIONS(1) | 265 S_028804_STATIC_ANCHOR_ASSOCIATIONS(1)); 266 radeon_set_context_reg(cs, EG_R_028A4C_PA_SC_MODE_CNTL_1, 267 sc_mode_cntl_1); 268 } 269 } 270
