1 /**************************************************************************
3 * Copyright 2005 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
28 #include "main/glheader.h"
29 #include "main/context.h"
30 #include "main/enums.h"
31 #include "main/imports.h"
32 #include "main/macros.h"
33 #include "main/mtypes.h"
35 #include "swrast_setup/swrast_setup.h"
36 #include "swrast/swrast.h"
38 #include "brw_context.h"
39 #include "brw_fallback.h"
40 #include "intel_chipset.h"
41 #include "intel_fbo.h"
42 #include "intel_regions.h"
44 #include "glapi/glapi.h"
46 #define FILE_DEBUG_FLAG DEBUG_FALLBACKS
48 static GLboolean
do_check_fallback(struct brw_context
*brw
)
50 GLcontext
*ctx
= &brw
->intel
.ctx
;
53 if (brw
->intel
.no_rast
) {
54 DBG("FALLBACK: rasterization disabled\n");
60 if (ctx
->RenderMode
!= GL_RENDER
) {
61 DBG("FALLBACK: render mode\n");
67 for (i
= 0; i
< BRW_MAX_TEX_UNIT
; i
++) {
68 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[i
];
69 if (texUnit
->_ReallyEnabled
) {
70 struct intel_texture_object
*intelObj
= intel_texture_object(texUnit
->_Current
);
71 struct gl_texture_image
*texImage
= intelObj
->base
.Image
[0][intelObj
->firstLevel
];
72 if (texImage
->Border
) {
73 DBG("FALLBACK: texture border\n");
81 if (ctx
->Stencil
._Enabled
&&
82 (ctx
->DrawBuffer
->Name
== 0 && !brw
->intel
.hw_stencil
)) {
83 DBG("FALLBACK: stencil\n");
88 if (!brw
->has_surface_tile_offset
) {
89 for (i
= 0; i
< ctx
->DrawBuffer
->_NumColorDrawBuffers
; i
++) {
90 struct gl_renderbuffer
*rb
= ctx
->DrawBuffer
->_ColorDrawBuffers
[i
];
91 struct intel_renderbuffer
*irb
= intel_renderbuffer(rb
);
93 /* The original gen4 hardware couldn't set up WM surfaces pointing
94 * at an offset within a tile, which can happen when rendering to
95 * anything but the base level of a texture or the +X face/0 depth.
96 * This was fixed with the 4 Series hardware.
98 * For these original chips, you would have to make the depth and
99 * color destination surfaces include information on the texture
100 * type, LOD, face, and various limits to use them as a destination.
101 * I would have done this, but there's also a nasty requirement that
102 * the depth and the color surfaces all be of the same LOD, which
103 * may be a worse requirement than this alignment. (Also, we may
104 * want to just demote the texture to untiled, instead).
106 if (irb
->region
&& irb
->region
->tiling
!= I915_TILING_NONE
&&
107 (irb
->region
->draw_offset
& 4095)) {
108 DBG("FALLBACK: non-tile-aligned destination for tiled FBO\n");
117 static void check_fallback(struct brw_context
*brw
)
119 brw
->intel
.Fallback
= do_check_fallback(brw
);
122 const struct brw_tracked_state brw_check_fallback
= {
124 .mesa
= _NEW_BUFFERS
| _NEW_RENDERMODE
| _NEW_TEXTURE
| _NEW_STENCIL
,
128 .prepare
= check_fallback
135 * Called by the INTEL_FALLBACK() macro.
136 * NOTE: this is a no-op for the i965 driver. The brw->intel.Fallback
137 * field is treated as a boolean, not a bitmask. It's only set in a
140 void intelFallback( struct intel_context
*intel
, GLuint bit
, GLboolean mode
)