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  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 "st_context.h"
  35. #include "st_atom.h"
  36. #include "st_debug.h"
  37. #include "st_program.h"
  38. #include "pipe/p_context.h"
  39. #include "pipe/p_defines.h"
  40. #include "cso_cache/cso_context.h"
  41.  
  42.  
  43. static GLuint translate_fill( GLenum mode )
  44. {
  45.    switch (mode) {
  46.    case GL_POINT:
  47.       return PIPE_POLYGON_MODE_POINT;
  48.    case GL_LINE:
  49.       return PIPE_POLYGON_MODE_LINE;
  50.    case GL_FILL:
  51.       return PIPE_POLYGON_MODE_FILL;
  52.    default:
  53.       assert(0);
  54.       return 0;
  55.    }
  56. }
  57.  
  58.  
  59.  
  60. static void update_raster_state( struct st_context *st )
  61. {
  62.    struct gl_context *ctx = st->ctx;
  63.    struct pipe_rasterizer_state *raster = &st->state.rasterizer;
  64.    const struct gl_vertex_program *vertProg = ctx->VertexProgram._Current;
  65.    const struct gl_fragment_program *fragProg = ctx->FragmentProgram._Current;
  66.    uint i;
  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.       for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++) {
  184.          if (ctx->Point.CoordReplace[i]) {
  185.             raster->sprite_coord_enable |= 1 << i;
  186.          }
  187.       }
  188.       if (!st->needs_texcoord_semantic &&
  189.           fragProg->Base.InputsRead & VARYING_BIT_PNTC) {
  190.          raster->sprite_coord_enable |=
  191.             1 << st_get_generic_varying_index(st, VARYING_SLOT_PNTC);
  192.       }
  193.  
  194.       raster->point_quad_rasterization = 1;
  195.    }
  196.  
  197.    /* ST_NEW_VERTEX_PROGRAM
  198.     */
  199.    if (vertProg) {
  200.       if (vertProg->Base.Id == 0) {
  201.          if (vertProg->Base.OutputsWritten & BITFIELD64_BIT(VARYING_SLOT_PSIZ)) {
  202.             /* generated program which emits point size */
  203.             raster->point_size_per_vertex = TRUE;
  204.          }
  205.       }
  206.       else if (ctx->VertexProgram.PointSizeEnabled) {
  207.          /* user-defined program and GL_VERTEX_PROGRAM_POINT_SIZE set */
  208.          raster->point_size_per_vertex = ctx->VertexProgram.PointSizeEnabled;
  209.       }
  210.    }
  211.    if (!raster->point_size_per_vertex) {
  212.       /* clamp size now */
  213.       raster->point_size = CLAMP(ctx->Point.Size,
  214.                                  ctx->Point.MinSize,
  215.                                  ctx->Point.MaxSize);
  216.    }
  217.  
  218.    /* _NEW_LINE
  219.     */
  220.    raster->line_smooth = ctx->Line.SmoothFlag;
  221.    if (ctx->Line.SmoothFlag) {
  222.       raster->line_width = CLAMP(ctx->Line.Width,
  223.                                 ctx->Const.MinLineWidthAA,
  224.                                 ctx->Const.MaxLineWidthAA);
  225.    }
  226.    else {
  227.       raster->line_width = CLAMP(ctx->Line.Width,
  228.                                 ctx->Const.MinLineWidth,
  229.                                 ctx->Const.MaxLineWidth);
  230.    }
  231.  
  232.    raster->line_stipple_enable = ctx->Line.StippleFlag;
  233.    raster->line_stipple_pattern = ctx->Line.StipplePattern;
  234.    /* GL stipple factor is in [1,256], remap to [0, 255] here */
  235.    raster->line_stipple_factor = ctx->Line.StippleFactor - 1;
  236.  
  237.    /* _NEW_MULTISAMPLE */
  238.    raster->multisample = ctx->Multisample._Enabled;
  239.  
  240.    /* _NEW_SCISSOR */
  241.    raster->scissor = ctx->Scissor.EnableFlags;
  242.  
  243.    /* _NEW_FRAG_CLAMP */
  244.    raster->clamp_fragment_color = !st->clamp_frag_color_in_shader &&
  245.                                   ctx->Color._ClampFragmentColor;
  246.  
  247.    raster->half_pixel_center = 1;
  248.    if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP)
  249.       raster->bottom_edge_rule = 1;
  250.    /* _NEW_TRANSFORM */
  251.    if (ctx->Transform.ClipOrigin == GL_UPPER_LEFT)
  252.       raster->bottom_edge_rule ^= 1;
  253.  
  254.    /* ST_NEW_RASTERIZER */
  255.    raster->rasterizer_discard = ctx->RasterDiscard;
  256.  
  257.    if (st->edgeflag_culls_prims) {
  258.       /* All edge flags are FALSE. Cull the affected faces. */
  259.       if (raster->fill_front != PIPE_POLYGON_MODE_FILL)
  260.          raster->cull_face |= PIPE_FACE_FRONT;
  261.       if (raster->fill_back != PIPE_POLYGON_MODE_FILL)
  262.          raster->cull_face |= PIPE_FACE_BACK;
  263.    }
  264.  
  265.    /* _NEW_TRANSFORM */
  266.    raster->depth_clip = !ctx->Transform.DepthClamp;
  267.    raster->clip_plane_enable = ctx->Transform.ClipPlanesEnabled;
  268.    raster->clip_halfz = (ctx->Transform.ClipDepthMode == GL_ZERO_TO_ONE);
  269.  
  270.    cso_set_rasterizer(st->cso_context, raster);
  271. }
  272.  
  273. const struct st_tracked_state st_update_rasterizer = {
  274.    "st_update_rasterizer",    /* name */
  275.    {
  276.       (_NEW_BUFFERS |
  277.        _NEW_LIGHT |
  278.        _NEW_LINE |
  279.        _NEW_MULTISAMPLE |
  280.        _NEW_POINT |
  281.        _NEW_POLYGON |
  282.        _NEW_PROGRAM |
  283.        _NEW_SCISSOR |
  284.        _NEW_FRAG_CLAMP |
  285.        _NEW_TRANSFORM),     /* mesa state dependencies*/
  286.       (ST_NEW_VERTEX_PROGRAM |
  287.        ST_NEW_RASTERIZER),  /* state tracker dependencies */
  288.    },
  289.    update_raster_state     /* update function */
  290. };
  291.