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author | Zack Rusin <zack@tungstengraphics.com> | 2007-09-18 10:02:16 -0400 |
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committer | Zack Rusin <zack@tungstengraphics.com> | 2007-09-18 10:02:16 -0400 |
commit | de69fc1703f79e5c97e66b654de7a93b7abce8f0 (patch) | |
tree | 1e5755074add4101d85e85d096dd74b2e0a69939 /src/mesa/state_tracker/st_atom_rasterizer.c | |
parent | fbb2f840aef9a540401575b032edb4dfdabd10bb (diff) | |
download | external_mesa3d-de69fc1703f79e5c97e66b654de7a93b7abce8f0.zip external_mesa3d-de69fc1703f79e5c97e66b654de7a93b7abce8f0.tar.gz external_mesa3d-de69fc1703f79e5c97e66b654de7a93b7abce8f0.tar.bz2 |
Finishing up rename of the setup state to the rasterizer state.
Diffstat (limited to 'src/mesa/state_tracker/st_atom_rasterizer.c')
-rw-r--r-- | src/mesa/state_tracker/st_atom_rasterizer.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_atom_rasterizer.c b/src/mesa/state_tracker/st_atom_rasterizer.c new file mode 100644 index 0000000..cab8ad5 --- /dev/null +++ b/src/mesa/state_tracker/st_atom_rasterizer.c @@ -0,0 +1,224 @@ +/************************************************************************** + * + * 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 "st_cache.h" +#include "pipe/p_context.h" +#include "pipe/p_defines.h" +#include "st_atom.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; + default: + assert(0); + return 0; + } +} + +static GLboolean get_offset_flag( GLuint fill_mode, + const struct gl_polygon_attrib *p ) +{ + switch (fill_mode) { + case PIPE_POLYGON_MODE_POINT: + return p->OffsetPoint; + case PIPE_POLYGON_MODE_LINE: + return p->OffsetLine; + case PIPE_POLYGON_MODE_FILL: + return p->OffsetFill; + default: + assert(0); + return 0; + } +} + + +static void update_raster_state( struct st_context *st ) +{ + GLcontext *ctx = st->ctx; + struct pipe_rasterizer_state raster; + const struct pipe_rasterizer_state *cached; + + memset(&raster, 0, sizeof(raster)); + + /* _NEW_POLYGON, _NEW_BUFFERS + */ + { + if (ctx->Polygon.FrontFace == GL_CCW) + raster.front_winding = PIPE_WINDING_CCW; + else + raster.front_winding = PIPE_WINDING_CW; + + /* XXX + * I think the intention here is that user-created framebuffer objects + * use Y=0=TOP layout instead of OpenGL's normal Y=0=bottom layout. + * Flipping Y changes CW to CCW and vice-versa. + * But this is an implementation/driver-specific artifact - remove... + */ + if (ctx->DrawBuffer && ctx->DrawBuffer->Name != 0) + raster.front_winding ^= PIPE_WINDING_BOTH; + } + + /* _NEW_LIGHT + */ + if (ctx->Light.ShadeModel == GL_FLAT) + raster.flatshade = 1; + + /* _NEW_LIGHT | _NEW_PROGRAM + * + * Back-face colors can come from traditional lighting (when + * GL_LIGHT_MODEL_TWO_SIDE is set) or from vertex programs (when + * GL_VERTEX_PROGRAM_TWO_SIDE is set). Note the logic here. + */ + if (ctx->VertexProgram._Enabled) { + raster.light_twoside = ctx->VertexProgram.TwoSideEnabled; + } + else if (ctx->Light.Enabled && ctx->Light.Model.TwoSide) { + raster.light_twoside = 1; + } + + /* _NEW_POLYGON + */ + if (ctx->Polygon.CullFlag) { + if (ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK) { + raster.cull_mode = PIPE_WINDING_BOTH; + } + else if (ctx->Polygon.CullFaceMode == GL_FRONT) { + raster.cull_mode = raster.front_winding; + } + else { + raster.cull_mode = raster.front_winding ^ PIPE_WINDING_BOTH; + } + } + + /* _NEW_POLYGON + */ + { + GLuint fill_front = translate_fill( ctx->Polygon.FrontMode ); + GLuint fill_back = translate_fill( ctx->Polygon.BackMode ); + + if (raster.front_winding == PIPE_WINDING_CW) { + raster.fill_cw = fill_front; + raster.fill_ccw = fill_back; + } + else { + raster.fill_cw = fill_back; + raster.fill_ccw = fill_front; + } + + /* Simplify when culling is active: + */ + if (raster.cull_mode & PIPE_WINDING_CW) { + raster.fill_cw = raster.fill_ccw; + } + + if (raster.cull_mode & PIPE_WINDING_CCW) { + raster.fill_ccw = raster.fill_cw; + } + } + + /* _NEW_POLYGON + */ + if (ctx->Polygon.OffsetUnits != 0.0 || + ctx->Polygon.OffsetFactor != 0.0) { + raster.offset_cw = get_offset_flag( raster.fill_cw, &ctx->Polygon ); + raster.offset_ccw = get_offset_flag( raster.fill_ccw, &ctx->Polygon ); + raster.offset_units = ctx->Polygon.OffsetUnits; + raster.offset_scale = ctx->Polygon.OffsetFactor; + } + + if (ctx->Polygon.SmoothFlag) + raster.poly_smooth = 1; + + if (ctx->Polygon.StippleFlag) + raster.poly_stipple_enable = 1; + + + /* _NEW_BUFFERS, _NEW_POLYGON + */ + if (raster.fill_cw != PIPE_POLYGON_MODE_FILL || + raster.fill_ccw != PIPE_POLYGON_MODE_FILL) + { + GLfloat mrd = (ctx->DrawBuffer ? + ctx->DrawBuffer->_MRD : + 1.0); + + raster.offset_units = ctx->Polygon.OffsetFactor * mrd; + raster.offset_scale = (ctx->Polygon.OffsetUnits * mrd * + st->polygon_offset_scale); + } + + /* _NEW_POINT + */ + raster.point_size = ctx->Point.Size; + raster.point_smooth = ctx->Point.SmoothFlag; + + /* _NEW_LINE + */ + raster.line_width = ctx->Line.Width; + raster.line_smooth = ctx->Line.SmoothFlag; + 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 */ + if (ctx->Multisample.Enabled) + raster.multisample = 1; + + /* _NEW_SCISSOR */ + if (ctx->Scissor.Enabled) + raster.scissor = 1; + + cached = st_cached_rasterizer_state(st, &raster); + if (st->state.rasterizer != cached) { + st->state.rasterizer = cached; + st->pipe->bind_rasterizer_state( st->pipe, cached ); + } +} + +const struct st_tracked_state st_update_rasterizer = { + .name = "st_update_rasterizer", + .dirty = { + .mesa = (_NEW_LIGHT | _NEW_POLYGON | _NEW_LINE | _NEW_SCISSOR | + _NEW_POINT | _NEW_BUFFERS | _NEW_MULTISAMPLE), + .st = 0, + }, + .update = update_raster_state +}; |