src/gallium/drivers/nv50/nv50_clear.c

   1 /*
   2  * Copyright 2008 Ben Skeggs
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  18  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  19  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  */
  22
  23 #include "pipe/p_context.h"
  24 #include "pipe/p_defines.h"
  25 #include "pipe/p_state.h"
  26
  27 #include "nv50_context.h"
  28
  29 void
  30 nv50_clear(struct pipe_context *pipe, unsigned buffers,
  31            const float *rgba, double depth, unsigned stencil)
  32 {
  33         struct nv50_context *nv50 = nv50_context(pipe);
  34         struct nouveau_channel *chan = nv50->screen->base.channel;
  35         struct nouveau_grobj *tesla = nv50->screen->tesla;
  36         struct pipe_framebuffer_state *fb = &nv50->framebuffer;
  37         unsigned mode = 0, i;
  38         const unsigned dirty = nv50->dirty;
  39
  40         /* don't need NEW_BLEND, NV50TCL_COLOR_MASK doesn't affect CLEAR_BUFFERS */
  41         nv50->dirty &= NV50_NEW_FRAMEBUFFER | NV50_NEW_SCISSOR;
  42         if (!nv50_state_validate(nv50, 64))
  43                 return;
  44
  45         if (buffers & PIPE_CLEAR_COLOR && fb->nr_cbufs) {
  46                 BEGIN_RING(chan, tesla, NV50TCL_CLEAR_COLOR(0), 4);
  47                 OUT_RING  (chan, fui(rgba[0]));
  48                 OUT_RING  (chan, fui(rgba[1]));
  49                 OUT_RING  (chan, fui(rgba[2]));
  50                 OUT_RING  (chan, fui(rgba[3]));
  51                 mode |= 0x3c;
  52         }
  53
  54         if (buffers & PIPE_CLEAR_DEPTHSTENCIL) {
  55                 BEGIN_RING(chan, tesla, NV50TCL_CLEAR_DEPTH, 1);
  56                 OUT_RING  (chan, fui(depth));
  57                 BEGIN_RING(chan, tesla, NV50TCL_CLEAR_STENCIL, 1);
  58                 OUT_RING  (chan, stencil & 0xff);
  59
  60                 mode |= 0x03;
  61         }
  62
  63         BEGIN_RING(chan, tesla, NV50TCL_CLEAR_BUFFERS, 1);
  64         OUT_RING  (chan, mode);
  65
  66         for (i = 1; i < fb->nr_cbufs; i++) {
  67                 BEGIN_RING(chan, tesla, NV50TCL_CLEAR_BUFFERS, 1);
  68                 OUT_RING  (chan, (i << 6) | 0x3c);
  69         }
  70         nv50->dirty = dirty;
  71 }
  72