src/gallium/drivers/i965/brw_swtnl.c

   1
   2 #include "brw_context.h"
   3 #include "brw_pipe_rast.h"
   4
   5
   6 #if 0
   7
   8 static GLboolean need_swtnl( struct brw_context *brw )
   9 {
  10    const struct pipe_rasterizer_state *rast = &brw->curr.rast->templ;
  11
  12    /* If we don't require strict OpenGL conformance, never
  13     * use fallbacks.  If we're forcing fallbacks, always
  14     * use fallfacks.
  15     */
  16    if (brw->flags.no_swtnl)
  17       return FALSE;
  18
  19    if (brw->flags.force_swtnl)
  20       return TRUE;
  21
  22    /* Exceeding hw limits on number of VS inputs?
  23     */
  24    if (brw->curr.num_vertex_elements == 0 ||
  25        brw->curr.num_vertex_elements >= BRW_VEP_MAX) {
  26       return TRUE;
  27    }
  28
  29    /* Position array with zero stride?
  30     *
  31     * XXX: position isn't always at zero...
  32     * XXX: eliminate zero-stride arrays
  33     */
  34    {
  35       int ve0_vb = brw->curr.vertex_element[0].vertex_buffer_index;
  36
  37       if (brw->curr.vertex_buffer[ve0_vb].stride == 0)
  38          return TRUE;
  39    }
  40
  41    /* XXX: short-circuit
  42     */
  43    return FALSE;
  44
  45    if (brw->reduced_primitive == PIPE_PRIM_TRIANGLES) {
  46       if (rast->poly_smooth)
  47          return TRUE;
  48
  49    }
  50
  51    if (brw->reduced_primitive == PIPE_PRIM_LINES ||
  52        (brw->reduced_primitive == PIPE_PRIM_TRIANGLES &&
  53         (rast->fill_cw == PIPE_POLYGON_MODE_LINE ||
  54          rast->fill_ccw == PIPE_POLYGON_MODE_LINE)))
  55    {
  56       /* BRW hardware will do AA lines, but they are non-conformant it
  57        * seems.  TBD whether we keep this fallback:
  58        */
  59       if (rast->line_smooth)
  60          return TRUE;
  61
  62       /* XXX: was a fallback in mesa (gs doesn't get enough
  63        * information to know when to reset stipple counter), but there
  64        * must be a way around it.
  65        */
  66       if (rast->line_stipple_enable &&
  67           (brw->reduced_primitive == PIPE_PRIM_TRIANGLES ||
  68            brw->primitive == PIPE_PRIM_LINE_LOOP ||
  69            brw->primitive == PIPE_PRIM_LINE_STRIP))
  70          return TRUE;
  71    }
  72
  73
  74    if (brw->reduced_primitive == PIPE_PRIM_POINTS ||
  75        (brw->reduced_primitive == PIPE_PRIM_TRIANGLES &&
  76         (rast->fill_cw == PIPE_POLYGON_MODE_POINT ||
  77          rast->fill_ccw == PIPE_POLYGON_MODE_POINT)))
  78    {
  79       if (rast->point_smooth)
  80          return TRUE;
  81    }
  82
  83    /* BRW hardware doesn't handle CLAMP texturing correctly;
  84     * brw_wm_sampler_state:translate_wrap_mode() treats CLAMP
  85     * as CLAMP_TO_EDGE instead.  If we're using CLAMP, and
  86     * we want strict conformance, force the fallback.
  87     *
  88     * XXX: need a workaround for this.
  89     */
  90
  91    /* Nothing stopping us from the fast path now */
  92    return FALSE;
  93 }
  94
  95 #endif