st_atom_rasterizer.c revision 1b4852345954af9b582b03a91a3d8399b8fb0e92
1/************************************************************************** 2 * 3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. 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 TUNGSTEN GRAPHICS 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 <keith@tungstengraphics.com> 31 */ 32 33 34#include "st_context.h" 35#include "st_cache.h" 36#include "pipe/p_context.h" 37#include "pipe/p_defines.h" 38#include "st_atom.h" 39 40static GLuint translate_fill( GLenum mode ) 41{ 42 switch (mode) { 43 case GL_POINT: 44 return PIPE_POLYGON_MODE_POINT; 45 case GL_LINE: 46 return PIPE_POLYGON_MODE_LINE; 47 case GL_FILL: 48 return PIPE_POLYGON_MODE_FILL; 49 default: 50 assert(0); 51 return 0; 52 } 53} 54 55static GLboolean get_offset_flag( GLuint fill_mode, 56 const struct gl_polygon_attrib *p ) 57{ 58 switch (fill_mode) { 59 case PIPE_POLYGON_MODE_POINT: 60 return p->OffsetPoint; 61 case PIPE_POLYGON_MODE_LINE: 62 return p->OffsetLine; 63 case PIPE_POLYGON_MODE_FILL: 64 return p->OffsetFill; 65 default: 66 assert(0); 67 return 0; 68 } 69} 70 71 72static void update_raster_state( struct st_context *st ) 73{ 74 GLcontext *ctx = st->ctx; 75 struct pipe_rasterizer_state raster; 76 const struct cso_rasterizer *cso; 77 uint i; 78 79 memset(&raster, 0, sizeof(raster)); 80 81 /* _NEW_POLYGON, _NEW_BUFFERS 82 */ 83 { 84 if (ctx->Polygon.FrontFace == GL_CCW) 85 raster.front_winding = PIPE_WINDING_CCW; 86 else 87 raster.front_winding = PIPE_WINDING_CW; 88 89 /* XXX 90 * I think the intention here is that user-created framebuffer objects 91 * use Y=0=TOP layout instead of OpenGL's normal Y=0=bottom layout. 92 * Flipping Y changes CW to CCW and vice-versa. 93 * But this is an implementation/driver-specific artifact - remove... 94 */ 95 if (ctx->DrawBuffer && ctx->DrawBuffer->Name != 0) 96 raster.front_winding ^= PIPE_WINDING_BOTH; 97 } 98 99 /* _NEW_LIGHT 100 */ 101 if (ctx->Light.ShadeModel == GL_FLAT) 102 raster.flatshade = 1; 103 104 /* _NEW_LIGHT | _NEW_PROGRAM 105 * 106 * Back-face colors can come from traditional lighting (when 107 * GL_LIGHT_MODEL_TWO_SIDE is set) or from vertex programs (when 108 * GL_VERTEX_PROGRAM_TWO_SIDE is set). Note the logic here. 109 */ 110 if (ctx->VertexProgram._Enabled) { 111 raster.light_twoside = ctx->VertexProgram.TwoSideEnabled; 112 } 113 else if (ctx->Light.Enabled && ctx->Light.Model.TwoSide) { 114 raster.light_twoside = 1; 115 } 116 117 /* _NEW_POLYGON 118 */ 119 if (ctx->Polygon.CullFlag) { 120 if (ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK) { 121 raster.cull_mode = PIPE_WINDING_BOTH; 122 } 123 else if (ctx->Polygon.CullFaceMode == GL_FRONT) { 124 raster.cull_mode = raster.front_winding; 125 } 126 else { 127 raster.cull_mode = raster.front_winding ^ PIPE_WINDING_BOTH; 128 } 129 } 130 131 /* _NEW_POLYGON 132 */ 133 { 134 GLuint fill_front = translate_fill( ctx->Polygon.FrontMode ); 135 GLuint fill_back = translate_fill( ctx->Polygon.BackMode ); 136 137 if (raster.front_winding == PIPE_WINDING_CW) { 138 raster.fill_cw = fill_front; 139 raster.fill_ccw = fill_back; 140 } 141 else { 142 raster.fill_cw = fill_back; 143 raster.fill_ccw = fill_front; 144 } 145 146 /* Simplify when culling is active: 147 */ 148 if (raster.cull_mode & PIPE_WINDING_CW) { 149 raster.fill_cw = raster.fill_ccw; 150 } 151 152 if (raster.cull_mode & PIPE_WINDING_CCW) { 153 raster.fill_ccw = raster.fill_cw; 154 } 155 } 156 157 /* _NEW_POLYGON 158 */ 159 if (ctx->Polygon.OffsetUnits != 0.0 || 160 ctx->Polygon.OffsetFactor != 0.0) { 161 raster.offset_cw = get_offset_flag( raster.fill_cw, &ctx->Polygon ); 162 raster.offset_ccw = get_offset_flag( raster.fill_ccw, &ctx->Polygon ); 163 raster.offset_units = ctx->Polygon.OffsetUnits; 164 raster.offset_scale = ctx->Polygon.OffsetFactor; 165 } 166 167 if (ctx->Polygon.SmoothFlag) 168 raster.poly_smooth = 1; 169 170 if (ctx->Polygon.StippleFlag) 171 raster.poly_stipple_enable = 1; 172 173 174 /* _NEW_BUFFERS, _NEW_POLYGON 175 */ 176 if (raster.fill_cw != PIPE_POLYGON_MODE_FILL || 177 raster.fill_ccw != PIPE_POLYGON_MODE_FILL) 178 { 179 GLfloat mrd = (ctx->DrawBuffer ? 180 ctx->DrawBuffer->_MRD : 181 1.0); 182 183 raster.offset_units = ctx->Polygon.OffsetFactor * mrd; 184 raster.offset_scale = (ctx->Polygon.OffsetUnits * mrd * 185 st->polygon_offset_scale); 186 } 187 188 /* _NEW_POINT 189 */ 190 raster.point_size = ctx->Point.Size; 191 raster.point_smooth = ctx->Point.SmoothFlag; 192 raster.point_sprite = ctx->Point.PointSprite; 193 for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++) { 194 if (ctx->Point.CoordReplace[i]) { 195 if (ctx->Point.SpriteOrigin == GL_UPPER_LEFT) 196 raster.sprite_coord_mode[i] = PIPE_SPRITE_COORD_UPPER_LEFT; 197 else 198 raster.sprite_coord_mode[i] = PIPE_SPRITE_COORD_LOWER_LEFT; 199 } 200 else { 201 raster.sprite_coord_mode[i] = PIPE_SPRITE_COORD_NONE; 202 } 203 } 204 205 /* _NEW_LINE 206 */ 207 raster.line_width = ctx->Line.Width; 208 raster.line_smooth = ctx->Line.SmoothFlag; 209 raster.line_stipple_enable = ctx->Line.StippleFlag; 210 raster.line_stipple_pattern = ctx->Line.StipplePattern; 211 /* GL stipple factor is in [1,256], remap to [0, 255] here */ 212 raster.line_stipple_factor = ctx->Line.StippleFactor - 1; 213 214 /* _NEW_MULTISAMPLE */ 215 if (ctx->Multisample.Enabled) 216 raster.multisample = 1; 217 218 /* _NEW_SCISSOR */ 219 if (ctx->Scissor.Enabled) 220 raster.scissor = 1; 221 222 cso = st_cached_rasterizer_state(st, &raster); 223 if (st->state.rasterizer != cso) { 224 st->state.rasterizer = cso; 225 st->pipe->bind_rasterizer_state(st->pipe, cso->data); 226 } 227} 228 229const struct st_tracked_state st_update_rasterizer = { 230 .name = "st_update_rasterizer", 231 .dirty = { 232 .mesa = (_NEW_LIGHT | _NEW_POLYGON | _NEW_LINE | _NEW_SCISSOR | 233 _NEW_POINT | _NEW_BUFFERS | _NEW_MULTISAMPLE), 234 .st = 0, 235 }, 236 .update = update_raster_state 237}; 238