2 * Intel i810 DRI driver for Mesa 3.5
4 * Copyright (C) 1999-2000 Keith Whitwell All Rights Reserved.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL KEITH WHITWELL BE LIABLE FOR
20 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
21 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 * Keith Whitwell <keith@tungstengraphics.com>
26 * Adapted for use on the I830:
27 * Jeff Hartmann <jhartmann@2d3d.com>
29 /* $XFree86: xc/lib/GL/mesa/src/drv/i830/i830_render.c,v 1.2 2002/12/10 01:26:53 dawes Exp $ */
32 * Render unclipped vertex buffers by emitting vertices directly to
33 * dma buffers. Use strip/fan hardware acceleration where possible.
43 #include "tnl/t_context.h"
45 #include "i830_screen.h"
48 #include "i830_context.h"
49 #include "i830_tris.h"
50 #include "i830_state.h"
51 #include "i830_ioctl.h"
54 * Render unclipped vertex buffers by emitting vertices directly to
55 * dma buffers. Use strip/fan hardware primitives where possible.
56 * Try to simulate missing primitives with indexed vertices.
58 #define HAVE_POINTS 0 /* Has it, but can't use because subpixel has to
59 * be adjusted for points on the I830/I845G
62 #define HAVE_LINE_STRIPS 1
63 #define HAVE_TRIANGLES 1
64 #define HAVE_TRI_STRIPS 1
65 #define HAVE_TRI_STRIP_1 0 /* has it, template can't use it yet */
66 #define HAVE_TRI_FANS 1
67 #define HAVE_POLYGONS 1
69 #define HAVE_QUAD_STRIPS 0
73 static GLuint hw_prim
[GL_POLYGON
+1] = {
86 static const GLenum reduced_prim
[GL_POLYGON
+1] = {
99 static const int scale_prim
[GL_POLYGON
+1] = {
100 0, /* fallback case */
107 0, /* fallback case */
108 0, /* fallback case */
113 #define LOCAL_VARS i830ContextPtr imesa = I830_CONTEXT(ctx)
114 #define INIT( prim ) do { \
115 I830_STATECHANGE(imesa, 0); \
116 i830RasterPrimitive( ctx, reduced_prim[prim], hw_prim[prim] ); \
119 #define FLUSH() I830_FIREVERTICES( imesa )
120 #define GET_CURRENT_VB_MAX_VERTS() \
121 (((int)imesa->vertex_high - (int)imesa->vertex_low) / (imesa->vertex_size*4))
122 #define GET_SUBSEQUENT_VB_MAX_VERTS() \
123 (I830_DMA_BUF_SZ-8) / (imesa->vertex_size * 4)
126 #define ALLOC_VERTS( nr ) \
127 i830AllocDmaLow( imesa, nr * imesa->vertex_size * 4)
128 #define EMIT_VERTS( ctx, j, nr, buf ) \
129 _tnl_emit_vertices_to_buffer(ctx, j, (j)+(nr), buf)
131 #define TAG(x) i830_##x
132 #include "tnl_dd/t_dd_dmatmp.h"
135 /**********************************************************************/
136 /* Render pipeline stage */
137 /**********************************************************************/
139 /* Heuristic for i830, which can only emit a single primitive per dma
140 * buffer, and has only a small number of dma buffers.
142 static GLboolean
choose_render( struct vertex_buffer
*VB
, int bufsz
)
151 for (i
= 0 ; i
< VB
->PrimitiveCount
; i
++)
153 GLuint prim
= VB
->Primitive
[i
].mode
;
154 GLuint length
= VB
->Primitive
[i
].count
;
159 if (!hw_prim
[prim
& PRIM_MODE_MASK
])
163 nr_rverts
+= length
* scale_prim
[prim
& PRIM_MODE_MASK
];
165 if (reduced_prim
[prim
&PRIM_MODE_MASK
] != rprim
) {
167 rprim
= reduced_prim
[prim
&PRIM_MODE_MASK
];
171 nr_prims
+= i
/ bufsz
;
172 nr_rprims
+= nr_rverts
/ bufsz
;
174 if ((nr_prims
> nr_rprims
* 2) ||
175 (nr_prims
> nr_rprims
+ 3))
182 static GLboolean
i830_run_render( GLcontext
*ctx
,
183 struct tnl_pipeline_stage
*stage
)
185 i830ContextPtr imesa
= I830_CONTEXT(ctx
);
186 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
187 struct vertex_buffer
*VB
= &tnl
->vb
;
189 /* Don't handle clipping or indexed vertices.
191 if (imesa
->RenderIndex
!= 0 ||
192 !i830_validate_render( ctx
, VB
) ||
193 !choose_render( VB
, 200 )) { /* 200 is estimate of nr verts/buf */
197 tnl
->Driver
.Render
.Start( ctx
);
199 for (i
= 0 ; i
< VB
->PrimitiveCount
; i
++)
201 GLuint prim
= VB
->Primitive
[i
].mode
;
202 GLuint start
= VB
->Primitive
[i
].start
;
203 GLuint length
= VB
->Primitive
[i
].count
;
208 i830_render_tab_verts
[prim
& PRIM_MODE_MASK
]( ctx
, start
, start
+ length
,
212 tnl
->Driver
.Render
.Finish( ctx
);
214 return GL_FALSE
; /* finished the pipe */
218 static void i830_check_render( GLcontext
*ctx
,
219 struct tnl_pipeline_stage
*stage
)
221 stage
->inputs
= TNL_CONTEXT(ctx
)->render_inputs
;
224 static void dtr( struct tnl_pipeline_stage
*stage
)
230 const struct tnl_pipeline_stage _i830_render_stage
=
233 (_DD_NEW_SEPARATE_SPECULAR
|
236 _NEW_RENDERMODE
), /* re-check (new inputs) */
237 0, /* re-run (always runs) */
238 GL_TRUE
, /* active */
239 0, 0, /* inputs (set in check_render), outputs */
240 0, 0, /* changed_inputs, private */
241 dtr
, /* destructor */
242 i830_check_render
, /* check - initially set to alloc data */
243 i830_run_render
/* run */