1 /* 2 Copyright (C) Intel Corp. 2006. All Rights Reserved. 3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to 4 develop this 3D driver. 5 6 Permission is hereby granted, free of charge, to any person obtaining 7 a copy of this software and associated documentation files (the 8 "Software"), to deal in the Software without restriction, including 9 without limitation the rights to use, copy, modify, merge, publish, 10 distribute, sublicense, and/or sell copies of the Software, and to 11 permit persons to whom the Software is furnished to do so, subject to 12 the following conditions: 13 14 The above copyright notice and this permission notice (including the 15 next paragraph) shall be included in all copies or substantial 16 portions of the Software. 17 18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 21 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE 22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 26 **********************************************************************/ 27 /* 28 * Authors: 29 * Keith Whitwell <keith (at) tungstengraphics.com> 30 */ 31 32 33 #include "main/macros.h" 34 #include "brw_context.h" 35 #include "brw_vs.h" 36 37 /* Component is active if it may diverge from [0,0,0,1]. Undef values 38 * are promoted to [0,0,0,1] for the purposes of this analysis. 39 */ 40 struct tracker { 41 bool twoside; 42 GLubyte active[PROGRAM_OUTPUT+1][MAX_PROGRAM_TEMPS]; 43 GLbitfield size_masks[4]; /**< one bit per fragment program input attrib */ 44 }; 45 46 47 static void set_active_component( struct tracker *t, 48 GLuint file, 49 GLuint index, 50 GLubyte active ) 51 { 52 switch (file) { 53 case PROGRAM_TEMPORARY: 54 case PROGRAM_INPUT: 55 case PROGRAM_OUTPUT: 56 assert(file < PROGRAM_OUTPUT + 1); 57 assert(index < Elements(t->active[0])); 58 t->active[file][index] |= active; 59 break; 60 default: 61 break; 62 } 63 } 64 65 static void set_active( struct tracker *t, 66 struct prog_dst_register dst, 67 GLuint active ) 68 { 69 set_active_component( t, dst.File, dst.Index, active & dst.WriteMask ); 70 } 71 72 73 static GLubyte get_active_component( struct tracker *t, 74 GLuint file, 75 GLuint index, 76 GLuint component, 77 GLubyte swz ) 78 { 79 switch (swz) { 80 case SWIZZLE_ZERO: 81 return component < 3 ? 0 : (1<<component); 82 case SWIZZLE_ONE: 83 return component == 3 ? 0 : (1<<component); 84 default: 85 switch (file) { 86 case PROGRAM_TEMPORARY: 87 case PROGRAM_INPUT: 88 case PROGRAM_OUTPUT: 89 return t->active[file][index] & (1<<component); 90 default: 91 return 1 << component; 92 } 93 } 94 } 95 96 97 static GLubyte get_active( struct tracker *t, 98 struct prog_src_register src ) 99 { 100 GLuint i; 101 GLubyte active = src.Negate; /* NOTE! */ 102 103 if (src.RelAddr) 104 return 0xf; 105 106 for (i = 0; i < 4; i++) 107 active |= get_active_component(t, src.File, src.Index, i, 108 GET_SWZ(src.Swizzle, i)); 109 110 return active; 111 } 112 113 /** 114 * Return the size (1,2,3 or 4) of the output/result for VERT_RESULT_idx. 115 */ 116 static GLubyte get_output_size( struct tracker *t, 117 GLuint idx ) 118 { 119 GLubyte active; 120 assert(idx < VERT_RESULT_MAX); 121 active = t->active[PROGRAM_OUTPUT][idx]; 122 if (active & (1<<3)) return 4; 123 if (active & (1<<2)) return 3; 124 if (active & (1<<1)) return 2; 125 if (active & (1<<0)) return 1; 126 return 0; 127 } 128 129 /* Note the potential copying that occurs in the setup program: 130 */ 131 static void calc_sizes( struct tracker *t ) 132 { 133 GLint vertRes; 134 135 if (t->twoside) { 136 t->active[PROGRAM_OUTPUT][VERT_RESULT_COL0] |= 137 t->active[PROGRAM_OUTPUT][VERT_RESULT_BFC0]; 138 139 t->active[PROGRAM_OUTPUT][VERT_RESULT_COL1] |= 140 t->active[PROGRAM_OUTPUT][VERT_RESULT_BFC1]; 141 } 142 143 /* Examine vertex program output sizes to set the size_masks[] info 144 * which describes the fragment program input sizes. 145 */ 146 for (vertRes = 0; vertRes < VERT_RESULT_MAX; vertRes++) { 147 148 /* map vertex program output index to fragment program input index */ 149 GLint fragAttrib = _mesa_vert_result_to_frag_attrib(vertRes); 150 if (fragAttrib < 0) 151 continue; 152 153 switch (get_output_size(t, vertRes)) { 154 case 4: t->size_masks[4-1] |= 1 << fragAttrib; 155 case 3: t->size_masks[3-1] |= 1 << fragAttrib; 156 case 2: t->size_masks[2-1] |= 1 << fragAttrib; 157 case 1: t->size_masks[1-1] |= 1 << fragAttrib; 158 break; 159 } 160 } 161 } 162 163 static GLubyte szflag[4+1] = { 164 0, 165 0x1, 166 0x3, 167 0x7, 168 0xf 169 }; 170 171 /* Pull a size out of the packed array: 172 */ 173 static GLuint get_input_size(struct brw_context *brw, 174 GLuint attr) 175 { 176 GLuint sizes_dword = brw->vb.info.sizes[attr/16]; 177 GLuint sizes_bits = (sizes_dword>>((attr%16)*2)) & 0x3; 178 return sizes_bits + 1; 179 /* return brw->vb.inputs[attr].glarray->Size; */ 180 } 181 182 /* Calculate sizes of vertex program outputs. Size is the largest 183 * component index which might vary from [0,0,0,1] 184 */ 185 static void calc_wm_input_sizes( struct brw_context *brw ) 186 { 187 struct gl_context *ctx = &brw->intel.ctx; 188 /* BRW_NEW_VERTEX_PROGRAM */ 189 const struct brw_vertex_program *vp = 190 brw_vertex_program_const(brw->vertex_program); 191 /* BRW_NEW_INPUT_DIMENSIONS */ 192 struct tracker t; 193 GLuint insn; 194 GLuint i; 195 196 /* Mesa IR is not generated for GLSL vertex shaders. If there's no Mesa 197 * IR, the code below cannot determine which output components are 198 * written. So, skip it and assume everything is written. This 199 * circumvents some optimizations in the fragment shader, but it guarantees 200 * that correct code is generated. 201 */ 202 if (vp->program.Base.NumInstructions == 0) { 203 brw->wm.input_size_masks[0] = ~0; 204 brw->wm.input_size_masks[1] = ~0; 205 brw->wm.input_size_masks[2] = ~0; 206 brw->wm.input_size_masks[3] = ~0; 207 return; 208 } 209 210 211 memset(&t, 0, sizeof(t)); 212 213 /* _NEW_LIGHT | _NEW_PROGRAM */ 214 if (ctx->VertexProgram._TwoSideEnabled) 215 t.twoside = 1; 216 217 for (i = 0; i < VERT_ATTRIB_MAX; i++) 218 if (vp->program.Base.InputsRead & BITFIELD64_BIT(i)) 219 set_active_component(&t, PROGRAM_INPUT, i, 220 szflag[get_input_size(brw, i)]); 221 222 for (insn = 0; insn < vp->program.Base.NumInstructions; insn++) { 223 struct prog_instruction *inst = &vp->program.Base.Instructions[insn]; 224 225 switch (inst->Opcode) { 226 case OPCODE_ARL: 227 break; 228 229 case OPCODE_MOV: 230 set_active(&t, inst->DstReg, get_active(&t, inst->SrcReg[0])); 231 break; 232 233 default: 234 set_active(&t, inst->DstReg, 0xf); 235 break; 236 } 237 } 238 239 calc_sizes(&t); 240 241 if (memcmp(brw->wm.input_size_masks, t.size_masks, sizeof(t.size_masks)) != 0) { 242 memcpy(brw->wm.input_size_masks, t.size_masks, sizeof(t.size_masks)); 243 brw->state.dirty.brw |= BRW_NEW_WM_INPUT_DIMENSIONS; 244 } 245 } 246 247 const struct brw_tracked_state brw_wm_input_sizes = { 248 .dirty = { 249 .mesa = _NEW_LIGHT | _NEW_PROGRAM, 250 .brw = BRW_NEW_VERTEX_PROGRAM | BRW_NEW_INPUT_DIMENSIONS, 251 .cache = 0 252 }, 253 .emit = calc_wm_input_sizes 254 }; 255 256
