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, struct pipe_surface *ps,
  31            unsigned clearValue)
  32 {
  33         struct nv50_context *nv50 = nv50_context(pipe);
  34         struct nouveau_channel *chan = nv50->screen->nvws->channel;
  35         struct nouveau_grobj *tesla = nv50->screen->tesla;
  36         struct pipe_framebuffer_state fb, s_fb = nv50->framebuffer;
  37         struct pipe_scissor_state sc, s_sc = nv50->scissor;
  38         unsigned dirty = nv50->dirty;
  39
  40         nv50->dirty = 0;
  41
  42         if (ps->format == PIPE_FORMAT_Z24S8_UNORM ||
  43             ps->format == PIPE_FORMAT_Z16_UNORM) {
  44                 fb.nr_cbufs = 0;
  45                 fb.zsbuf = ps;
  46         } else {
  47                 fb.nr_cbufs = 1;
  48                 fb.cbufs[0] = ps;
  49                 fb.zsbuf = NULL;
  50         }
  51         fb.width = ps->width;
  52         fb.height = ps->height;
  53         pipe->set_framebuffer_state(pipe, &fb);
  54
  55         sc.minx = sc.miny = 0;
  56         sc.maxx = fb.width;
  57         sc.maxy = fb.height;
  58         pipe->set_scissor_state(pipe, &sc);
  59
  60         nv50_state_validate(nv50);
  61
  62         switch (ps->format) {
  63         case PIPE_FORMAT_A8R8G8B8_UNORM:
  64                 BEGIN_RING(chan, tesla, 0x0d80, 4);
  65                 OUT_RINGf (chan, ubyte_to_float((clearValue >> 16) & 0xff));
  66                 OUT_RINGf (chan, ubyte_to_float((clearValue >>  8) & 0xff));
  67                 OUT_RINGf (chan, ubyte_to_float((clearValue >>  0) & 0xff));
  68                 OUT_RINGf (chan, ubyte_to_float((clearValue >> 24) & 0xff));
  69                 BEGIN_RING(chan, tesla, 0x19d0, 1);
  70                 OUT_RING  (chan, 0x3c);
  71                 break;
  72         case PIPE_FORMAT_Z24S8_UNORM:
  73                 BEGIN_RING(chan, tesla, 0x0d90, 1);
  74                 OUT_RINGf (chan, (float)(clearValue >> 8) * (1.0 / 16777215.0));
  75                 BEGIN_RING(chan, tesla, 0x0da0, 1);
  76                 OUT_RING  (chan, clearValue & 0xff);
  77                 BEGIN_RING(chan, tesla, 0x19d0, 1);
  78                 OUT_RING  (chan, 0x03);
  79                 break;
  80         default:
  81                 pipe->surface_fill(pipe, ps, 0, 0, ps->width, ps->height,
  82                                    clearValue);
  83                 break;
  84         }
  85
  86         pipe->set_framebuffer_state(pipe, &s_fb);
  87         pipe->set_scissor_state(pipe, &s_sc);
  88         nv50->dirty |= dirty;
  89
  90         ps->status = PIPE_SURFACE_STATUS_CLEAR;
  91 }
  92