brw_cc.c revision 34474fa4119378ef9fbb9fb557cc19c0a1ca1f7e
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@tungstengraphics.com> 30 */ 31 32 33#include "brw_context.h" 34#include "brw_state.h" 35#include "brw_defines.h" 36#include "brw_util.h" 37#include "main/macros.h" 38 39static void prepare_cc_vp( struct brw_context *brw ) 40{ 41 GLcontext *ctx = &brw->intel.ctx; 42 struct brw_cc_viewport ccv; 43 44 memset(&ccv, 0, sizeof(ccv)); 45 46 /* _NEW_TRANSOFORM */ 47 if (ctx->Transform.DepthClamp) { 48 /* _NEW_VIEWPORT */ 49 ccv.min_depth = MIN2(ctx->Viewport.Near, ctx->Viewport.Far); 50 ccv.max_depth = MAX2(ctx->Viewport.Near, ctx->Viewport.Far); 51 } else { 52 ccv.min_depth = 0.0; 53 ccv.max_depth = 1.0; 54 } 55 56 drm_intel_bo_unreference(brw->cc.vp_bo); 57 brw->cc.vp_bo = brw_cache_data(&brw->cache, BRW_CC_VP, &ccv, sizeof(ccv), 58 NULL, 0); 59} 60 61const struct brw_tracked_state brw_cc_vp = { 62 .dirty = { 63 .mesa = _NEW_VIEWPORT | _NEW_TRANSFORM, 64 .brw = BRW_NEW_CONTEXT, 65 .cache = 0 66 }, 67 .prepare = prepare_cc_vp 68}; 69 70struct brw_cc_unit_key { 71 GLboolean stencil, stencil_two_side, color_blend, alpha_enabled; 72 73 GLenum stencil_func[2], stencil_fail_op[2]; 74 GLenum stencil_pass_depth_fail_op[2], stencil_pass_depth_pass_op[2]; 75 GLubyte stencil_ref[2], stencil_write_mask[2], stencil_test_mask[2]; 76 GLenum logic_op; 77 78 GLenum blend_eq_rgb, blend_eq_a; 79 GLenum blend_src_rgb, blend_src_a; 80 GLenum blend_dst_rgb, blend_dst_a; 81 82 GLenum alpha_func; 83 GLclampf alpha_ref; 84 85 GLboolean dither; 86 87 GLboolean depth_test, depth_write; 88 GLenum depth_func; 89}; 90 91/** 92 * Modify blend function to force destination alpha to 1.0 93 * 94 * If \c function specifies a blend function that uses destination alpha, 95 * replace it with a function that hard-wires destination alpha to 1.0. This 96 * is used when rendering to xRGB targets. 97 */ 98static GLenum 99fix_xRGB_alpha(GLenum function) 100{ 101 switch (function) { 102 case GL_DST_ALPHA: 103 return GL_ONE; 104 105 case GL_ONE_MINUS_DST_ALPHA: 106 case GL_SRC_ALPHA_SATURATE: 107 return GL_ZERO; 108 } 109 110 return function; 111} 112 113static void 114cc_unit_populate_key(struct brw_context *brw, struct brw_cc_unit_key *key) 115{ 116 GLcontext *ctx = &brw->intel.ctx; 117 const unsigned back = ctx->Stencil._BackFace; 118 119 memset(key, 0, sizeof(*key)); 120 121 key->stencil = ctx->Stencil._Enabled; 122 key->stencil_two_side = ctx->Stencil._TestTwoSide; 123 124 if (key->stencil) { 125 key->stencil_func[0] = ctx->Stencil.Function[0]; 126 key->stencil_fail_op[0] = ctx->Stencil.FailFunc[0]; 127 key->stencil_pass_depth_fail_op[0] = ctx->Stencil.ZFailFunc[0]; 128 key->stencil_pass_depth_pass_op[0] = ctx->Stencil.ZPassFunc[0]; 129 key->stencil_ref[0] = ctx->Stencil.Ref[0]; 130 key->stencil_write_mask[0] = ctx->Stencil.WriteMask[0]; 131 key->stencil_test_mask[0] = ctx->Stencil.ValueMask[0]; 132 } 133 if (key->stencil_two_side) { 134 key->stencil_func[1] = ctx->Stencil.Function[back]; 135 key->stencil_fail_op[1] = ctx->Stencil.FailFunc[back]; 136 key->stencil_pass_depth_fail_op[1] = ctx->Stencil.ZFailFunc[back]; 137 key->stencil_pass_depth_pass_op[1] = ctx->Stencil.ZPassFunc[back]; 138 key->stencil_ref[1] = ctx->Stencil.Ref[back]; 139 key->stencil_write_mask[1] = ctx->Stencil.WriteMask[back]; 140 key->stencil_test_mask[1] = ctx->Stencil.ValueMask[back]; 141 } 142 143 if (ctx->Color._LogicOpEnabled) 144 key->logic_op = ctx->Color.LogicOp; 145 else 146 key->logic_op = GL_COPY; 147 148 key->color_blend = ctx->Color.BlendEnabled; 149 if (key->color_blend) { 150 key->blend_eq_rgb = ctx->Color.BlendEquationRGB; 151 key->blend_eq_a = ctx->Color.BlendEquationA; 152 key->blend_src_rgb = ctx->Color.BlendSrcRGB; 153 key->blend_dst_rgb = ctx->Color.BlendDstRGB; 154 key->blend_src_a = ctx->Color.BlendSrcA; 155 key->blend_dst_a = ctx->Color.BlendDstA; 156 157 /* If the renderbuffer is XRGB, we have to frob the blend function to 158 * force the destination alpha to 1.0. This means replacing GL_DST_ALPHA 159 * with GL_ONE and GL_ONE_MINUS_DST_ALPHA with GL_ZERO. 160 */ 161 if (ctx->DrawBuffer->Visual.alphaBits == 0) { 162 key->blend_src_rgb = fix_xRGB_alpha(key->blend_src_rgb); 163 key->blend_src_a = fix_xRGB_alpha(key->blend_src_a); 164 key->blend_dst_rgb = fix_xRGB_alpha(key->blend_dst_rgb); 165 key->blend_dst_a = fix_xRGB_alpha(key->blend_dst_a); 166 } 167 } 168 169 key->alpha_enabled = ctx->Color.AlphaEnabled; 170 if (key->alpha_enabled) { 171 key->alpha_func = ctx->Color.AlphaFunc; 172 key->alpha_ref = ctx->Color.AlphaRef; 173 } 174 175 key->dither = ctx->Color.DitherFlag; 176 177 key->depth_test = ctx->Depth.Test; 178 if (key->depth_test) { 179 key->depth_func = ctx->Depth.Func; 180 key->depth_write = ctx->Depth.Mask; 181 } 182} 183 184/** 185 * Creates the state cache entry for the given CC unit key. 186 */ 187static drm_intel_bo * 188cc_unit_create_from_key(struct brw_context *brw, struct brw_cc_unit_key *key) 189{ 190 struct brw_cc_unit_state cc; 191 drm_intel_bo *bo; 192 193 memset(&cc, 0, sizeof(cc)); 194 195 /* _NEW_STENCIL */ 196 if (key->stencil) { 197 cc.cc0.stencil_enable = 1; 198 cc.cc0.stencil_func = 199 intel_translate_compare_func(key->stencil_func[0]); 200 cc.cc0.stencil_fail_op = 201 intel_translate_stencil_op(key->stencil_fail_op[0]); 202 cc.cc0.stencil_pass_depth_fail_op = 203 intel_translate_stencil_op(key->stencil_pass_depth_fail_op[0]); 204 cc.cc0.stencil_pass_depth_pass_op = 205 intel_translate_stencil_op(key->stencil_pass_depth_pass_op[0]); 206 cc.cc1.stencil_ref = key->stencil_ref[0]; 207 cc.cc1.stencil_write_mask = key->stencil_write_mask[0]; 208 cc.cc1.stencil_test_mask = key->stencil_test_mask[0]; 209 210 if (key->stencil_two_side) { 211 cc.cc0.bf_stencil_enable = 1; 212 cc.cc0.bf_stencil_func = 213 intel_translate_compare_func(key->stencil_func[1]); 214 cc.cc0.bf_stencil_fail_op = 215 intel_translate_stencil_op(key->stencil_fail_op[1]); 216 cc.cc0.bf_stencil_pass_depth_fail_op = 217 intel_translate_stencil_op(key->stencil_pass_depth_fail_op[1]); 218 cc.cc0.bf_stencil_pass_depth_pass_op = 219 intel_translate_stencil_op(key->stencil_pass_depth_pass_op[1]); 220 cc.cc1.bf_stencil_ref = key->stencil_ref[1]; 221 cc.cc2.bf_stencil_write_mask = key->stencil_write_mask[1]; 222 cc.cc2.bf_stencil_test_mask = key->stencil_test_mask[1]; 223 } 224 225 /* Not really sure about this: 226 */ 227 if (key->stencil_write_mask[0] || 228 (key->stencil_two_side && key->stencil_write_mask[1])) 229 cc.cc0.stencil_write_enable = 1; 230 } 231 232 /* _NEW_COLOR */ 233 if (key->logic_op != GL_COPY) { 234 cc.cc2.logicop_enable = 1; 235 cc.cc5.logicop_func = intel_translate_logic_op(key->logic_op); 236 } else if (key->color_blend) { 237 GLenum eqRGB = key->blend_eq_rgb; 238 GLenum eqA = key->blend_eq_a; 239 GLenum srcRGB = key->blend_src_rgb; 240 GLenum dstRGB = key->blend_dst_rgb; 241 GLenum srcA = key->blend_src_a; 242 GLenum dstA = key->blend_dst_a; 243 244 if (eqRGB == GL_MIN || eqRGB == GL_MAX) { 245 srcRGB = dstRGB = GL_ONE; 246 } 247 248 if (eqA == GL_MIN || eqA == GL_MAX) { 249 srcA = dstA = GL_ONE; 250 } 251 252 cc.cc6.dest_blend_factor = brw_translate_blend_factor(dstRGB); 253 cc.cc6.src_blend_factor = brw_translate_blend_factor(srcRGB); 254 cc.cc6.blend_function = brw_translate_blend_equation(eqRGB); 255 256 cc.cc5.ia_dest_blend_factor = brw_translate_blend_factor(dstA); 257 cc.cc5.ia_src_blend_factor = brw_translate_blend_factor(srcA); 258 cc.cc5.ia_blend_function = brw_translate_blend_equation(eqA); 259 260 cc.cc3.blend_enable = 1; 261 cc.cc3.ia_blend_enable = (srcA != srcRGB || 262 dstA != dstRGB || 263 eqA != eqRGB); 264 } 265 266 if (key->alpha_enabled) { 267 cc.cc3.alpha_test = 1; 268 cc.cc3.alpha_test_func = intel_translate_compare_func(key->alpha_func); 269 cc.cc3.alpha_test_format = BRW_ALPHATEST_FORMAT_UNORM8; 270 271 UNCLAMPED_FLOAT_TO_UBYTE(cc.cc7.alpha_ref.ub[0], key->alpha_ref); 272 } 273 274 if (key->dither) { 275 cc.cc5.dither_enable = 1; 276 cc.cc6.y_dither_offset = 0; 277 cc.cc6.x_dither_offset = 0; 278 } 279 280 /* _NEW_DEPTH */ 281 if (key->depth_test) { 282 cc.cc2.depth_test = 1; 283 cc.cc2.depth_test_function = intel_translate_compare_func(key->depth_func); 284 cc.cc2.depth_write_enable = key->depth_write; 285 } 286 287 /* CACHE_NEW_CC_VP */ 288 cc.cc4.cc_viewport_state_offset = brw->cc.vp_bo->offset >> 5; /* reloc */ 289 290 if (INTEL_DEBUG & DEBUG_STATS) 291 cc.cc5.statistics_enable = 1; 292 293 bo = brw_upload_cache(&brw->cache, BRW_CC_UNIT, 294 key, sizeof(*key), 295 &brw->cc.vp_bo, 1, 296 &cc, sizeof(cc)); 297 298 /* Emit CC viewport relocation */ 299 dri_bo_emit_reloc(bo, 300 I915_GEM_DOMAIN_INSTRUCTION, 301 0, 302 0, 303 offsetof(struct brw_cc_unit_state, cc4), 304 brw->cc.vp_bo); 305 306 return bo; 307} 308 309static void prepare_cc_unit( struct brw_context *brw ) 310{ 311 struct brw_cc_unit_key key; 312 313 cc_unit_populate_key(brw, &key); 314 315 drm_intel_bo_unreference(brw->cc.state_bo); 316 brw->cc.state_bo = brw_search_cache(&brw->cache, BRW_CC_UNIT, 317 &key, sizeof(key), 318 &brw->cc.vp_bo, 1, 319 NULL); 320 321 if (brw->cc.state_bo == NULL) 322 brw->cc.state_bo = cc_unit_create_from_key(brw, &key); 323} 324 325const struct brw_tracked_state brw_cc_unit = { 326 .dirty = { 327 .mesa = _NEW_STENCIL | _NEW_COLOR | _NEW_DEPTH, 328 .brw = 0, 329 .cache = CACHE_NEW_CC_VP 330 }, 331 .prepare = prepare_cc_unit, 332}; 333 334 335 336