src/gallium/drivers/nv30/nv30_state_viewport.c

   1 #include "nv30_context.h"
   2
   3 static boolean
   4 nv30_state_viewport_validate(struct nv30_context *nv30)
   5 {
   6         struct pipe_viewport_state *vpt = &nv30->viewport;
   7         struct nouveau_stateobj *so;
   8         unsigned bypass;
   9
  10         if (/*nv30->render_mode == HW &&*/ !nv30->rasterizer->pipe.bypass_clipping)
  11                 bypass = 0;
  12         else
  13                 bypass = 1;
  14
  15         if (nv30->state.hw[NV30_STATE_VIEWPORT] &&
  16             (bypass || !(nv30->dirty & NV30_NEW_VIEWPORT)) &&
  17             nv30->state.viewport_bypass == bypass)
  18                 return FALSE;
  19         nv30->state.viewport_bypass = bypass;
  20
  21         so = so_new(11, 0);
  22         if (!bypass) {
  23                 so_method(so, nv30->screen->rankine,
  24                           NV34TCL_VIEWPORT_TRANSLATE_X, 8);
  25                 so_data  (so, fui(vpt->translate[0]));
  26                 so_data  (so, fui(vpt->translate[1]));
  27                 so_data  (so, fui(vpt->translate[2]));
  28                 so_data  (so, fui(vpt->translate[3]));
  29                 so_data  (so, fui(vpt->scale[0]));
  30                 so_data  (so, fui(vpt->scale[1]));
  31                 so_data  (so, fui(vpt->scale[2]));
  32                 so_data  (so, fui(vpt->scale[3]));
  33 /*              so_method(so, nv30->screen->rankine, 0x1d78, 1);
  34                 so_data  (so, 1);
  35 */      } else {
  36                 so_method(so, nv30->screen->rankine,
  37                           NV34TCL_VIEWPORT_TRANSLATE_X, 8);
  38                 so_data  (so, fui(0.0));
  39                 so_data  (so, fui(0.0));
  40                 so_data  (so, fui(0.0));
  41                 so_data  (so, fui(0.0));
  42                 so_data  (so, fui(1.0));
  43                 so_data  (so, fui(1.0));
  44                 so_data  (so, fui(1.0));
  45                 so_data  (so, fui(0.0));
  46                 /* Not entirely certain what this is yet.  The DDX uses this
  47                  * value also as it fixes rendering when you pass
  48                  * pre-transformed vertices to the GPU.  My best gusss is that
  49                  * this bypasses some culling/clipping stage.  Might be worth
  50                  * noting that points/lines are uneffected by whatever this
  51                  * value fixes, only filled polygons are effected.
  52                  */
  53 /*              so_method(so, nv30->screen->rankine, 0x1d78, 1);
  54                 so_data  (so, 0x110);
  55 */      }
  56         /* TODO/FIXME: never saw value 0x0110 in renouveau dumps, only 0x0001 */
  57         so_method(so, nv30->screen->rankine, 0x1d78, 1);
  58         so_data  (so, 1);
  59
  60         so_ref(so, &nv30->state.hw[NV30_STATE_VIEWPORT]);
  61         return TRUE;
  62 }
  63
  64 struct nv30_state_entry nv30_state_viewport = {
  65         .validate = nv30_state_viewport_validate,
  66         .dirty = {
  67                 .pipe = NV30_NEW_VIEWPORT | NV30_NEW_RAST,
  68                 .hw = NV30_STATE_VIEWPORT
  69         }
  70 };