/************************************************************************** * * Copyright 2007 VMware, Inc. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sub license, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * **************************************************************************/ /* * Authors: * Keith Whitwell */ #include "main/macros.h" #include "main/framebuffer.h" #include "main/state.h" #include "st_context.h" #include "st_atom.h" #include "st_debug.h" #include "st_program.h" #include "pipe/p_context.h" #include "pipe/p_defines.h" #include "cso_cache/cso_context.h" static GLuint translate_fill( GLenum mode ) { switch (mode) { case GL_POINT: return PIPE_POLYGON_MODE_POINT; case GL_LINE: return PIPE_POLYGON_MODE_LINE; case GL_FILL: return PIPE_POLYGON_MODE_FILL; case GL_FILL_RECTANGLE_NV: return PIPE_POLYGON_MODE_FILL_RECTANGLE; default: assert(0); return 0; } } void st_update_rasterizer( struct st_context *st ) { struct gl_context *ctx = st->ctx; struct pipe_rasterizer_state *raster = &st->state.rasterizer; const struct gl_program *vertProg = ctx->VertexProgram._Current; const struct gl_program *fragProg = ctx->FragmentProgram._Current; memset(raster, 0, sizeof(*raster)); /* _NEW_POLYGON, _NEW_BUFFERS */ { raster->front_ccw = (ctx->Polygon.FrontFace == GL_CCW); /* _NEW_TRANSFORM */ if (ctx->Transform.ClipOrigin == GL_UPPER_LEFT) { raster->front_ccw ^= 1; } /* * Gallium's surfaces are Y=0=TOP orientation. OpenGL is the * opposite. Window system surfaces are Y=0=TOP. Mesa's FBOs * must match OpenGL conventions so FBOs use Y=0=BOTTOM. In that * case, we must invert Y and flip the notion of front vs. back. */ if (st->state.fb_orientation == Y_0_BOTTOM) { /* Drawing to an FBO. The viewport will be inverted. */ raster->front_ccw ^= 1; } } /* _NEW_LIGHT */ raster->flatshade = ctx->Light.ShadeModel == GL_FLAT; raster->flatshade_first = ctx->Light.ProvokingVertex == GL_FIRST_VERTEX_CONVENTION_EXT; /* _NEW_LIGHT | _NEW_PROGRAM */ raster->light_twoside = _mesa_vertex_program_two_side_enabled(ctx); /*_NEW_LIGHT | _NEW_BUFFERS */ raster->clamp_vertex_color = !st->clamp_vert_color_in_shader && ctx->Light._ClampVertexColor; /* _NEW_POLYGON */ if (ctx->Polygon.CullFlag) { switch (ctx->Polygon.CullFaceMode) { case GL_FRONT: raster->cull_face = PIPE_FACE_FRONT; break; case GL_BACK: raster->cull_face = PIPE_FACE_BACK; break; case GL_FRONT_AND_BACK: raster->cull_face = PIPE_FACE_FRONT_AND_BACK; break; } } else { raster->cull_face = PIPE_FACE_NONE; } /* _NEW_POLYGON */ { if (ST_DEBUG & DEBUG_WIREFRAME) { raster->fill_front = PIPE_POLYGON_MODE_LINE; raster->fill_back = PIPE_POLYGON_MODE_LINE; } else { raster->fill_front = translate_fill( ctx->Polygon.FrontMode ); raster->fill_back = translate_fill( ctx->Polygon.BackMode ); } /* Simplify when culling is active: */ if (raster->cull_face & PIPE_FACE_FRONT) { raster->fill_front = raster->fill_back; } if (raster->cull_face & PIPE_FACE_BACK) { raster->fill_back = raster->fill_front; } } /* _NEW_POLYGON */ if (ctx->Polygon.OffsetPoint || ctx->Polygon.OffsetLine || ctx->Polygon.OffsetFill) { raster->offset_point = ctx->Polygon.OffsetPoint; raster->offset_line = ctx->Polygon.OffsetLine; raster->offset_tri = ctx->Polygon.OffsetFill; raster->offset_units = ctx->Polygon.OffsetUnits; raster->offset_scale = ctx->Polygon.OffsetFactor; raster->offset_clamp = ctx->Polygon.OffsetClamp; } raster->poly_smooth = ctx->Polygon.SmoothFlag; raster->poly_stipple_enable = ctx->Polygon.StippleFlag; /* _NEW_POINT */ raster->point_size = ctx->Point.Size; raster->point_smooth = !ctx->Point.PointSprite && ctx->Point.SmoothFlag; /* _NEW_POINT | _NEW_PROGRAM */ if (ctx->Point.PointSprite) { /* origin */ if ((ctx->Point.SpriteOrigin == GL_UPPER_LEFT) ^ (st->state.fb_orientation == Y_0_BOTTOM)) raster->sprite_coord_mode = PIPE_SPRITE_COORD_UPPER_LEFT; else raster->sprite_coord_mode = PIPE_SPRITE_COORD_LOWER_LEFT; /* Coord replacement flags. If bit 'k' is set that means * that we need to replace GENERIC[k] attrib with an automatically * computed texture coord. */ raster->sprite_coord_enable = ctx->Point.CoordReplace & ((1u << MAX_TEXTURE_COORD_UNITS) - 1); if (!st->needs_texcoord_semantic && fragProg->info.inputs_read & VARYING_BIT_PNTC) { raster->sprite_coord_enable |= 1 << st_get_generic_varying_index(st, VARYING_SLOT_PNTC); } raster->point_quad_rasterization = 1; } /* ST_NEW_VERTEX_PROGRAM */ if (vertProg) { if (vertProg->Id == 0) { if (vertProg->info.outputs_written & BITFIELD64_BIT(VARYING_SLOT_PSIZ)) { /* generated program which emits point size */ raster->point_size_per_vertex = TRUE; } } else if (ctx->API != API_OPENGLES2) { /* PointSizeEnabled is always set in ES2 contexts */ raster->point_size_per_vertex = ctx->VertexProgram.PointSizeEnabled; } else { /* ST_NEW_TESSEVAL_PROGRAM | ST_NEW_GEOMETRY_PROGRAM */ /* We have to check the last bound stage and see if it writes psize */ struct gl_program *last = NULL; if (ctx->GeometryProgram._Current) last = ctx->GeometryProgram._Current; else if (ctx->TessEvalProgram._Current) last = ctx->TessEvalProgram._Current; else if (ctx->VertexProgram._Current) last = ctx->VertexProgram._Current; if (last) raster->point_size_per_vertex = !!(last->info.outputs_written & BITFIELD64_BIT(VARYING_SLOT_PSIZ)); } } if (!raster->point_size_per_vertex) { /* clamp size now */ raster->point_size = CLAMP(ctx->Point.Size, ctx->Point.MinSize, ctx->Point.MaxSize); } /* _NEW_LINE */ raster->line_smooth = ctx->Line.SmoothFlag; if (ctx->Line.SmoothFlag) { raster->line_width = CLAMP(ctx->Line.Width, ctx->Const.MinLineWidthAA, ctx->Const.MaxLineWidthAA); } else { raster->line_width = CLAMP(ctx->Line.Width, ctx->Const.MinLineWidth, ctx->Const.MaxLineWidth); } raster->line_stipple_enable = ctx->Line.StippleFlag; raster->line_stipple_pattern = ctx->Line.StipplePattern; /* GL stipple factor is in [1,256], remap to [0, 255] here */ raster->line_stipple_factor = ctx->Line.StippleFactor - 1; /* _NEW_MULTISAMPLE */ raster->multisample = _mesa_is_multisample_enabled(ctx); /* _NEW_MULTISAMPLE | _NEW_BUFFERS */ raster->force_persample_interp = !st->force_persample_in_shader && raster->multisample && ctx->Multisample.SampleShading && ctx->Multisample.MinSampleShadingValue * _mesa_geometric_samples(ctx->DrawBuffer) > 1; /* _NEW_SCISSOR */ raster->scissor = !!ctx->Scissor.EnableFlags; /* _NEW_FRAG_CLAMP */ raster->clamp_fragment_color = !st->clamp_frag_color_in_shader && ctx->Color._ClampFragmentColor; raster->half_pixel_center = 1; if (st->state.fb_orientation == Y_0_TOP) raster->bottom_edge_rule = 1; /* _NEW_TRANSFORM */ if (ctx->Transform.ClipOrigin == GL_UPPER_LEFT) raster->bottom_edge_rule ^= 1; /* ST_NEW_RASTERIZER */ raster->rasterizer_discard = ctx->RasterDiscard; if (ctx->TileRasterOrderFixed) { raster->tile_raster_order_fixed = true; raster->tile_raster_order_increasing_x = ctx->TileRasterOrderIncreasingX; raster->tile_raster_order_increasing_y = ctx->TileRasterOrderIncreasingY; } if (st->edgeflag_culls_prims) { /* All edge flags are FALSE. Cull the affected faces. */ if (raster->fill_front != PIPE_POLYGON_MODE_FILL) raster->cull_face |= PIPE_FACE_FRONT; if (raster->fill_back != PIPE_POLYGON_MODE_FILL) raster->cull_face |= PIPE_FACE_BACK; } /* _NEW_TRANSFORM */ raster->depth_clip = !ctx->Transform.DepthClamp; raster->clip_plane_enable = ctx->Transform.ClipPlanesEnabled; raster->clip_halfz = (ctx->Transform.ClipDepthMode == GL_ZERO_TO_ONE); cso_set_rasterizer(st->cso_context, raster); }