1/**********************************************************
2 * Copyright 2008-2009 VMware, Inc.  All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 **********************************************************/
25
26#include "svga_cmd.h"
27#include "svga_debug.h"
28
29#include "pipe/p_defines.h"
30#include "util/u_pack_color.h"
31
32#include "svga_context.h"
33#include "svga_state.h"
34#include "svga_surface.h"
35
36
37static enum pipe_error
38try_clear(struct svga_context *svga,
39          unsigned buffers,
40          const union pipe_color_union *color,
41          double depth,
42          unsigned stencil)
43{
44   enum pipe_error ret = PIPE_OK;
45   SVGA3dRect rect = { 0, 0, 0, 0 };
46   boolean restore_viewport = FALSE;
47   SVGA3dClearFlag flags = 0;
48   struct pipe_framebuffer_state *fb = &svga->curr.framebuffer;
49   union util_color uc = {0};
50
51   ret = svga_update_state(svga, SVGA_STATE_HW_CLEAR);
52   if (ret != PIPE_OK)
53      return ret;
54
55   if (svga->rebind.rendertargets) {
56      ret = svga_reemit_framebuffer_bindings(svga);
57      if (ret != PIPE_OK) {
58         return ret;
59      }
60   }
61
62   if ((buffers & PIPE_CLEAR_COLOR) && fb->cbufs[0]) {
63      flags |= SVGA3D_CLEAR_COLOR;
64      util_pack_color(color->f, PIPE_FORMAT_B8G8R8A8_UNORM, &uc);
65
66      rect.w = fb->cbufs[0]->width;
67      rect.h = fb->cbufs[0]->height;
68   }
69
70   if ((buffers & PIPE_CLEAR_DEPTHSTENCIL) && fb->zsbuf) {
71      if (buffers & PIPE_CLEAR_DEPTH)
72         flags |= SVGA3D_CLEAR_DEPTH;
73
74      if ((svga->curr.framebuffer.zsbuf->format == PIPE_FORMAT_S8_UINT_Z24_UNORM) &&
75          (buffers & PIPE_CLEAR_STENCIL))
76         flags |= SVGA3D_CLEAR_STENCIL;
77
78      rect.w = MAX2(rect.w, fb->zsbuf->width);
79      rect.h = MAX2(rect.h, fb->zsbuf->height);
80   }
81
82   if (memcmp(&rect, &svga->state.hw_clear.viewport, sizeof(rect)) != 0) {
83      restore_viewport = TRUE;
84      ret = SVGA3D_SetViewport(svga->swc, &rect);
85      if (ret != PIPE_OK)
86         return ret;
87   }
88
89   ret = SVGA3D_ClearRect(svga->swc, flags, uc.ui, depth, stencil,
90                          rect.x, rect.y, rect.w, rect.h);
91   if (ret != PIPE_OK)
92      return ret;
93
94   if (restore_viewport) {
95      memcpy(&rect, &svga->state.hw_clear.viewport, sizeof rect);
96      ret = SVGA3D_SetViewport(svga->swc, &rect);
97   }
98
99   return ret;
100}
101
102/**
103 * Clear the given surface to the specified value.
104 * No masking, no scissor (clear entire buffer).
105 */
106void
107svga_clear(struct pipe_context *pipe, unsigned buffers,
108           const union pipe_color_union *color,
109	   double depth, unsigned stencil)
110{
111   struct svga_context *svga = svga_context( pipe );
112   enum pipe_error ret;
113
114   if (buffers & PIPE_CLEAR_COLOR)
115      SVGA_DBG(DEBUG_DMA, "clear sid %p\n",
116               svga_surface(svga->curr.framebuffer.cbufs[0])->handle);
117
118   /* flush any queued prims (don't want them to appear after the clear!) */
119   svga_hwtnl_flush_retry(svga);
120
121   ret = try_clear( svga, buffers, color, depth, stencil );
122
123   if (ret == PIPE_ERROR_OUT_OF_MEMORY) {
124      /* Flush command buffer and retry:
125       */
126      svga_context_flush( svga, NULL );
127
128      ret = try_clear( svga, buffers, color, depth, stencil );
129   }
130
131   /*
132    * Mark target surfaces as dirty
133    * TODO Mark only cleared surfaces.
134    */
135   svga_mark_surfaces_dirty(svga);
136
137   assert (ret == PIPE_OK);
138}
139