diff options
Diffstat (limited to 'src/mesa/state_tracker/st_atom_setup.c')
| -rw-r--r-- | src/mesa/state_tracker/st_atom_setup.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_atom_setup.c b/src/mesa/state_tracker/st_atom_setup.c new file mode 100644 index 0000000000..2a582ea36c --- /dev/null +++ b/src/mesa/state_tracker/st_atom_setup.c @@ -0,0 +1,175 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * 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 TUNGSTEN GRAPHICS 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 <keith@tungstengraphics.com> + */ + + +#include "st_context.h" +#include "softpipe/sp_context.h" +#include "st_atom.h" + +static GLuint translate_fill( GLenum mode ) +{ + switch (mode) { + case GL_POINT: return FILL_POINT; + case GL_LINE: return FILL_LINE; + case GL_FILL: return FILL_TRI; + default: assert(0); return 0; + } +} + +static GLboolean get_offset_flag( GLuint fill_mode, + const struct gl_polygon_attrib *Polygon ) +{ + switch (fill_mode) { + case FILL_POINT: return Polygon->OffsetPoint; + case FILL_LINE: return Polygon->OffsetLine; + case FILL_TRI: return Polygon->OffsetFill; + default: assert(0); return 0; + } +} + + +static void update_setup_state( struct st_context *st ) +{ + GLcontext *ctx = st->ctx; + struct softpipe_setup_state setup; + + memset(&setup, 0, sizeof(setup)); + + /* _NEW_POLYGON, _NEW_BUFFERS + */ + { + setup.front_winding = WINDING_CW; + + if (ctx->DrawBuffer && ctx->DrawBuffer->Name != 0) + setup.front_winding ^= WINDING_BOTH; + + if (ctx->Polygon.FrontFace != GL_CCW) + setup.front_winding ^= WINDING_BOTH; + } + + /* _NEW_LIGHT + */ + if (ctx->Light.ShadeModel == GL_FLAT) + setup.flatshade = 1; + + /* _NEW_LIGHT + * + * Not sure about the light->enabled requirement - does this still + * apply?? + */ + if (ctx->Light.Enabled && + ctx->Light.Model.TwoSide) + setup.light_twoside = 1; + + + /* _NEW_POLYGON + */ + if (ctx->Polygon.CullFlag) { + if (ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK) { + setup.cull_mode = WINDING_BOTH; + } + else if (ctx->Polygon.CullFaceMode == GL_FRONT) { + setup.cull_mode = setup.front_winding; + } + else { + setup.cull_mode = setup.front_winding ^ WINDING_BOTH; + } + } + + /* _NEW_POLYGON + */ + { + GLuint fill_front = translate_fill( ctx->Polygon.FrontMode ); + GLuint fill_back = translate_fill( ctx->Polygon.BackMode ); + + if (setup.front_winding == WINDING_CW) { + setup.fill_cw = fill_front; + setup.fill_ccw = fill_back; + } + else { + setup.fill_cw = fill_back; + setup.fill_ccw = fill_front; + } + + /* Simplify when culling is active: + */ + if (setup.cull_mode & WINDING_CW) { + setup.fill_cw = setup.fill_ccw; + } + + if (setup.cull_mode & WINDING_CCW) { + setup.fill_ccw = setup.fill_cw; + } + } + + /* Hardware does offset for filled prims, but need to do it in + * software for unfilled. + * + * _NEW_POLYGON + */ + if (setup.fill_cw != FILL_TRI) + setup.offset_cw = get_offset_flag( setup.fill_cw, + &ctx->Polygon ); + + if (setup.fill_ccw != FILL_TRI) + setup.offset_ccw = get_offset_flag( setup.fill_ccw, + &ctx->Polygon ); + + + /* _NEW_BUFFERS, _NEW_POLYGON + */ + if (setup.fill_cw != FILL_TRI || + setup.fill_ccw != FILL_TRI) + { + GLfloat mrd = (ctx->DrawBuffer ? + ctx->DrawBuffer->_MRD : + 1.0); + + setup.offset_units = ctx->Polygon.OffsetFactor * mrd; + setup.offset_scale = (ctx->Polygon.OffsetUnits * mrd * + st->polygon_offset_scale); + } + + + if (memcmp(&setup, &st->state.setup, sizeof(setup)) != 0) { + st->state.setup = setup; + st->softpipe->set_setup_state( st->softpipe, &setup ); + } +} + +const struct st_tracked_state st_update_setup = { + .dirty = { + .mesa = (_NEW_LIGHT | _NEW_POLYGON | _NEW_BUFFERS), + .st = 0, + }, + .update = update_setup_state +}; |