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 &&*/
  11             !nv30->rasterizer->pipe.bypass_vs_clip_and_viewport)
  12                 bypass = 0;
  13         else
  14                 bypass = 1;
  15
  16         if (nv30->state.hw[NV30_STATE_VIEWPORT] &&
  17             (bypass || !(nv30->dirty & NV30_NEW_VIEWPORT)) &&
  18             nv30->state.viewport_bypass == bypass)
  19                 return FALSE;
  20         nv30->state.viewport_bypass = bypass;
  21
  22         so = so_new(3, 10, 0);
  23         if (!bypass) {
  24                 so_method(so, nv30->screen->rankine,
  25                           NV34TCL_VIEWPORT_TRANSLATE_X, 8);
  26                 so_data  (so, fui(vpt->translate[0]));
  27                 so_data  (so, fui(vpt->translate[1]));
  28                 so_data  (so, fui(vpt->translate[2]));
  29                 so_data  (so, fui(vpt->translate[3]));
  30                 so_data  (so, fui(vpt->scale[0]));
  31                 so_data  (so, fui(vpt->scale[1]));
  32                 so_data  (so, fui(vpt->scale[2]));
  33                 so_data  (so, fui(vpt->scale[3]));
  34 /*              so_method(so, nv30->screen->rankine, 0x1d78, 1);
  35                 so_data  (so, 1);
  36 */      } else {
  37                 so_method(so, nv30->screen->rankine,
  38                           NV34TCL_VIEWPORT_TRANSLATE_X, 8);
  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(0.0));
  43                 so_data  (so, fui(1.0));
  44                 so_data  (so, fui(1.0));
  45                 so_data  (so, fui(1.0));
  46                 so_data  (so, fui(0.0));
  47                 /* Not entirely certain what this is yet.  The DDX uses this
  48                  * value also as it fixes rendering when you pass
  49                  * pre-transformed vertices to the GPU.  My best gusss is that
  50                  * this bypasses some culling/clipping stage.  Might be worth
  51                  * noting that points/lines are uneffected by whatever this
  52                  * value fixes, only filled polygons are effected.
  53                  */
  54 /*              so_method(so, nv30->screen->rankine, 0x1d78, 1);
  55                 so_data  (so, 0x110);
  56 */      }
  57         /* TODO/FIXME: never saw value 0x0110 in renouveau dumps, only 0x0001 */
  58         so_method(so, nv30->screen->rankine, 0x1d78, 1);
  59         so_data  (so, 1);
  60
  61         so_ref(so, &nv30->state.hw[NV30_STATE_VIEWPORT]);
  62         so_ref(NULL, &so);
  63         return TRUE;
  64 }
  65
  66 struct nv30_state_entry nv30_state_viewport = {
  67         .validate = nv30_state_viewport_validate,
  68         .dirty = {
  69                 .pipe = NV30_NEW_VIEWPORT | NV30_NEW_RAST,
  70                 .hw = NV30_STATE_VIEWPORT
  71         }
  72 };