1/************************************************************************** 2 * 3 * Copyright 2007 VMware, Inc. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * 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, sub license, 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 portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 /* 29 * Authors: 30 * Keith Whitwell <keithw@vmware.com> 31 */ 32 33#include "main/macros.h" 34#include "main/framebuffer.h" 35#include "st_context.h" 36#include "st_atom.h" 37#include "st_debug.h" 38#include "st_program.h" 39#include "pipe/p_context.h" 40#include "pipe/p_defines.h" 41#include "cso_cache/cso_context.h" 42 43 44static GLuint translate_fill( GLenum mode ) 45{ 46 switch (mode) { 47 case GL_POINT: 48 return PIPE_POLYGON_MODE_POINT; 49 case GL_LINE: 50 return PIPE_POLYGON_MODE_LINE; 51 case GL_FILL: 52 return PIPE_POLYGON_MODE_FILL; 53 default: 54 assert(0); 55 return 0; 56 } 57} 58 59 60 61static void update_raster_state( struct st_context *st ) 62{ 63 struct gl_context *ctx = st->ctx; 64 struct pipe_rasterizer_state *raster = &st->state.rasterizer; 65 const struct gl_program *vertProg = ctx->VertexProgram._Current; 66 const struct gl_program *fragProg = ctx->FragmentProgram._Current; 67 68 memset(raster, 0, sizeof(*raster)); 69 70 /* _NEW_POLYGON, _NEW_BUFFERS 71 */ 72 { 73 raster->front_ccw = (ctx->Polygon.FrontFace == GL_CCW); 74 75 /* _NEW_TRANSFORM */ 76 if (ctx->Transform.ClipOrigin == GL_UPPER_LEFT) { 77 raster->front_ccw ^= 1; 78 } 79 80 /* 81 * Gallium's surfaces are Y=0=TOP orientation. OpenGL is the 82 * opposite. Window system surfaces are Y=0=TOP. Mesa's FBOs 83 * must match OpenGL conventions so FBOs use Y=0=BOTTOM. In that 84 * case, we must invert Y and flip the notion of front vs. back. 85 */ 86 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM) { 87 /* Drawing to an FBO. The viewport will be inverted. */ 88 raster->front_ccw ^= 1; 89 } 90 } 91 92 /* _NEW_LIGHT 93 */ 94 raster->flatshade = ctx->Light.ShadeModel == GL_FLAT; 95 96 raster->flatshade_first = ctx->Light.ProvokingVertex == 97 GL_FIRST_VERTEX_CONVENTION_EXT; 98 99 /* _NEW_LIGHT | _NEW_PROGRAM */ 100 raster->light_twoside = ctx->VertexProgram._TwoSideEnabled; 101 102 /*_NEW_LIGHT | _NEW_BUFFERS */ 103 raster->clamp_vertex_color = !st->clamp_vert_color_in_shader && 104 ctx->Light._ClampVertexColor; 105 106 /* _NEW_POLYGON 107 */ 108 if (ctx->Polygon.CullFlag) { 109 switch (ctx->Polygon.CullFaceMode) { 110 case GL_FRONT: 111 raster->cull_face = PIPE_FACE_FRONT; 112 break; 113 case GL_BACK: 114 raster->cull_face = PIPE_FACE_BACK; 115 break; 116 case GL_FRONT_AND_BACK: 117 raster->cull_face = PIPE_FACE_FRONT_AND_BACK; 118 break; 119 } 120 } 121 else { 122 raster->cull_face = PIPE_FACE_NONE; 123 } 124 125 /* _NEW_POLYGON 126 */ 127 { 128 if (ST_DEBUG & DEBUG_WIREFRAME) { 129 raster->fill_front = PIPE_POLYGON_MODE_LINE; 130 raster->fill_back = PIPE_POLYGON_MODE_LINE; 131 } 132 else { 133 raster->fill_front = translate_fill( ctx->Polygon.FrontMode ); 134 raster->fill_back = translate_fill( ctx->Polygon.BackMode ); 135 } 136 137 /* Simplify when culling is active: 138 */ 139 if (raster->cull_face & PIPE_FACE_FRONT) { 140 raster->fill_front = raster->fill_back; 141 } 142 143 if (raster->cull_face & PIPE_FACE_BACK) { 144 raster->fill_back = raster->fill_front; 145 } 146 } 147 148 /* _NEW_POLYGON 149 */ 150 if (ctx->Polygon.OffsetPoint || 151 ctx->Polygon.OffsetLine || 152 ctx->Polygon.OffsetFill) { 153 raster->offset_point = ctx->Polygon.OffsetPoint; 154 raster->offset_line = ctx->Polygon.OffsetLine; 155 raster->offset_tri = ctx->Polygon.OffsetFill; 156 raster->offset_units = ctx->Polygon.OffsetUnits; 157 raster->offset_scale = ctx->Polygon.OffsetFactor; 158 raster->offset_clamp = ctx->Polygon.OffsetClamp; 159 } 160 161 raster->poly_smooth = ctx->Polygon.SmoothFlag; 162 raster->poly_stipple_enable = ctx->Polygon.StippleFlag; 163 164 /* _NEW_POINT 165 */ 166 raster->point_size = ctx->Point.Size; 167 raster->point_smooth = !ctx->Point.PointSprite && ctx->Point.SmoothFlag; 168 169 /* _NEW_POINT | _NEW_PROGRAM 170 */ 171 if (ctx->Point.PointSprite) { 172 /* origin */ 173 if ((ctx->Point.SpriteOrigin == GL_UPPER_LEFT) ^ 174 (st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM)) 175 raster->sprite_coord_mode = PIPE_SPRITE_COORD_UPPER_LEFT; 176 else 177 raster->sprite_coord_mode = PIPE_SPRITE_COORD_LOWER_LEFT; 178 179 /* Coord replacement flags. If bit 'k' is set that means 180 * that we need to replace GENERIC[k] attrib with an automatically 181 * computed texture coord. 182 */ 183 raster->sprite_coord_enable = ctx->Point.CoordReplace & 184 ((1u << MAX_TEXTURE_COORD_UNITS) - 1); 185 if (!st->needs_texcoord_semantic && 186 fragProg->info.inputs_read & VARYING_BIT_PNTC) { 187 raster->sprite_coord_enable |= 188 1 << st_get_generic_varying_index(st, VARYING_SLOT_PNTC); 189 } 190 191 raster->point_quad_rasterization = 1; 192 } 193 194 /* ST_NEW_VERTEX_PROGRAM 195 */ 196 if (vertProg) { 197 if (vertProg->Id == 0) { 198 if (vertProg->info.outputs_written & 199 BITFIELD64_BIT(VARYING_SLOT_PSIZ)) { 200 /* generated program which emits point size */ 201 raster->point_size_per_vertex = TRUE; 202 } 203 } 204 else if (ctx->API != API_OPENGLES2) { 205 /* PointSizeEnabled is always set in ES2 contexts */ 206 raster->point_size_per_vertex = ctx->VertexProgram.PointSizeEnabled; 207 } 208 else { 209 /* ST_NEW_TESSEVAL_PROGRAM | ST_NEW_GEOMETRY_PROGRAM */ 210 /* We have to check the last bound stage and see if it writes psize */ 211 struct gl_program *last = NULL; 212 if (ctx->GeometryProgram._Current) 213 last = ctx->GeometryProgram._Current; 214 else if (ctx->TessEvalProgram._Current) 215 last = ctx->TessEvalProgram._Current; 216 else if (ctx->VertexProgram._Current) 217 last = ctx->VertexProgram._Current; 218 if (last) 219 raster->point_size_per_vertex = 220 !!(last->info.outputs_written & 221 BITFIELD64_BIT(VARYING_SLOT_PSIZ)); 222 } 223 } 224 if (!raster->point_size_per_vertex) { 225 /* clamp size now */ 226 raster->point_size = CLAMP(ctx->Point.Size, 227 ctx->Point.MinSize, 228 ctx->Point.MaxSize); 229 } 230 231 /* _NEW_LINE 232 */ 233 raster->line_smooth = ctx->Line.SmoothFlag; 234 if (ctx->Line.SmoothFlag) { 235 raster->line_width = CLAMP(ctx->Line.Width, 236 ctx->Const.MinLineWidthAA, 237 ctx->Const.MaxLineWidthAA); 238 } 239 else { 240 raster->line_width = CLAMP(ctx->Line.Width, 241 ctx->Const.MinLineWidth, 242 ctx->Const.MaxLineWidth); 243 } 244 245 raster->line_stipple_enable = ctx->Line.StippleFlag; 246 raster->line_stipple_pattern = ctx->Line.StipplePattern; 247 /* GL stipple factor is in [1,256], remap to [0, 255] here */ 248 raster->line_stipple_factor = ctx->Line.StippleFactor - 1; 249 250 /* _NEW_MULTISAMPLE */ 251 raster->multisample = _mesa_is_multisample_enabled(ctx); 252 253 /* _NEW_MULTISAMPLE | _NEW_BUFFERS */ 254 raster->force_persample_interp = 255 !st->force_persample_in_shader && 256 raster->multisample && 257 ctx->Multisample.SampleShading && 258 ctx->Multisample.MinSampleShadingValue * 259 _mesa_geometric_samples(ctx->DrawBuffer) > 1; 260 261 /* _NEW_SCISSOR */ 262 raster->scissor = ctx->Scissor.EnableFlags; 263 264 /* _NEW_FRAG_CLAMP */ 265 raster->clamp_fragment_color = !st->clamp_frag_color_in_shader && 266 ctx->Color._ClampFragmentColor; 267 268 raster->half_pixel_center = 1; 269 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) 270 raster->bottom_edge_rule = 1; 271 /* _NEW_TRANSFORM */ 272 if (ctx->Transform.ClipOrigin == GL_UPPER_LEFT) 273 raster->bottom_edge_rule ^= 1; 274 275 /* ST_NEW_RASTERIZER */ 276 raster->rasterizer_discard = ctx->RasterDiscard; 277 278 if (st->edgeflag_culls_prims) { 279 /* All edge flags are FALSE. Cull the affected faces. */ 280 if (raster->fill_front != PIPE_POLYGON_MODE_FILL) 281 raster->cull_face |= PIPE_FACE_FRONT; 282 if (raster->fill_back != PIPE_POLYGON_MODE_FILL) 283 raster->cull_face |= PIPE_FACE_BACK; 284 } 285 286 /* _NEW_TRANSFORM */ 287 raster->depth_clip = !ctx->Transform.DepthClamp; 288 raster->clip_plane_enable = ctx->Transform.ClipPlanesEnabled; 289 raster->clip_halfz = (ctx->Transform.ClipDepthMode == GL_ZERO_TO_ONE); 290 291 cso_set_rasterizer(st->cso_context, raster); 292} 293 294const struct st_tracked_state st_update_rasterizer = { 295 update_raster_state /* update function */ 296}; 297