brw_clear.c revision 7c3e88f1fc2aa9d3740163bcf8718e6d8709a204 
1/**************************************************************************
2 *
3 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * Copyright 2009 Intel Corporation.
5 * All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 **************************************************************************/
28
29#include "main/glheader.h"
30#include "main/mtypes.h"
31#include "main/condrender.h"
32#include "swrast/swrast.h"
33#include "drivers/common/meta.h"
34
35#include "intel_context.h"
36#include "intel_blit.h"
37#include "intel_clear.h"
38#include "intel_fbo.h"
39#include "intel_regions.h"
40
41#define FILE_DEBUG_FLAG DEBUG_BLIT
42
43static const char *buffer_names[] = {
44   [BUFFER_FRONT_LEFT] = "front",
45   [BUFFER_BACK_LEFT] = "back",
46   [BUFFER_FRONT_RIGHT] = "front right",
47   [BUFFER_BACK_RIGHT] = "back right",
48   [BUFFER_DEPTH] = "depth",
49   [BUFFER_STENCIL] = "stencil",
50   [BUFFER_ACCUM] = "accum",
51   [BUFFER_AUX0] = "aux0",
52   [BUFFER_COLOR0] = "color0",
53   [BUFFER_COLOR1] = "color1",
54   [BUFFER_COLOR2] = "color2",
55   [BUFFER_COLOR3] = "color3",
56   [BUFFER_COLOR4] = "color4",
57   [BUFFER_COLOR5] = "color5",
58   [BUFFER_COLOR6] = "color6",
59   [BUFFER_COLOR7] = "color7",
60};
61
62static void
63debug_mask(const char *name, GLbitfield mask)
64{
65   GLuint i;
66
67   if (unlikely(INTEL_DEBUG & DEBUG_BLIT)) {
68      DBG("%s clear:", name);
69      for (i = 0; i < BUFFER_COUNT; i++) {
70	 if (mask & (1 << i))
71	    DBG(" %s", buffer_names[i]);
72      }
73      DBG("\n");
74   }
75}
76
77/**
78 * Called by ctx->Driver.Clear.
79 */
80static void
81intelClear(struct gl_context *ctx, GLbitfield mask)
82{
83   struct intel_context *intel = intel_context(ctx);
84   GLbitfield tri_mask = 0;
85   GLbitfield swrast_mask = 0;
86   struct gl_framebuffer *fb = ctx->DrawBuffer;
87   struct intel_renderbuffer *irb;
88   int i;
89
90   if (!_mesa_check_conditional_render(ctx))
91      return;
92
93   if (mask & (BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_FRONT_RIGHT)) {
94      intel->front_buffer_dirty = true;
95   }
96
97   if (0)
98      fprintf(stderr, "%s\n", __FUNCTION__);
99
100   /* Get SW clears out of the way: Anything without an intel_renderbuffer */
101   for (i = 0; i < BUFFER_COUNT; i++) {
102      if (!(mask & (1 << i)))
103	 continue;
104
105      irb = intel_get_renderbuffer(fb, i);
106      if (unlikely(!irb)) {
107	 swrast_mask |= (1 << i);
108	 mask &= ~(1 << i);
109      }
110   }
111   if (unlikely(swrast_mask)) {
112      debug_mask("swrast", swrast_mask);
113      _swrast_Clear(ctx, swrast_mask);
114   }
115
116   tri_mask |= (mask & BUFFER_BITS_COLOR);
117
118   /* Make sure we have up to date buffers before we start looking at
119    * the tiling bits to determine how to clear. */
120   intel_prepare_render(intel);
121
122   /* HW stencil */
123   if (mask & BUFFER_BIT_STENCIL) {
124      const struct intel_region *stencilRegion
125         = intel_get_rb_region(fb, BUFFER_STENCIL);
126      if (stencilRegion) {
127	 tri_mask |= BUFFER_BIT_STENCIL;
128      }
129   }
130
131   /* HW depth */
132   if (mask & BUFFER_BIT_DEPTH) {
133      tri_mask |= BUFFER_BIT_DEPTH;
134   }
135
136   /* Anything left, just use tris */
137   tri_mask |= mask;
138
139   if (tri_mask) {
140      debug_mask("tri", tri_mask);
141      _mesa_meta_glsl_Clear(&intel->ctx, tri_mask);
142   }
143}
144
145
146void
147intelInitClearFuncs(struct dd_function_table *functions)
148{
149   functions->Clear = intelClear;
150}
151