2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 * Keith Whitwell <keith@tungstengraphics.com>
36 #include "t_context.h"
37 #include "t_pipeline.h"
38 #include "t_vp_build.h"
44 static GLubyte
*get_space(GLcontext
*ctx
, GLuint bytes
)
46 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
47 GLubyte
*space
= _mesa_malloc(bytes
);
49 tnl
->block
[tnl
->nr_blocks
++] = space
;
54 static void free_space(GLcontext
*ctx
)
56 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
58 for (i
= 0; i
< tnl
->nr_blocks
; i
++)
59 _mesa_free(tnl
->block
[i
]);
64 /* Convert the incoming array to GLfloats. Understands the
65 * array->Normalized flag and selects the correct conversion method.
67 #define CONVERT( TYPE, MACRO ) do { \
69 if (input->Normalized) { \
70 for (i = 0; i < count; i++) { \
71 const TYPE *in = (TYPE *)ptr; \
72 for (j = 0; j < sz; j++) { \
73 *fptr++ = MACRO(*in); \
76 ptr += input->StrideB; \
79 for (i = 0; i < count; i++) { \
80 const TYPE *in = (TYPE *)ptr; \
81 for (j = 0; j < sz; j++) { \
82 *fptr++ = (GLfloat)(*in); \
85 ptr += input->StrideB; \
92 /* Adjust pointer to point at first requested element, convert to
93 * floating point, populate VB->AttribPtr[].
95 static void _tnl_import_array( GLcontext
*ctx
,
98 const struct gl_client_array
*input
,
101 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
102 struct vertex_buffer
*VB
= &tnl
->vb
;
103 GLuint stride
= input
->StrideB
;
105 if (input
->Type
!= GL_FLOAT
) {
106 const GLuint sz
= input
->Size
;
107 GLubyte
*buf
= get_space(ctx
, count
* sz
* sizeof(GLfloat
));
108 GLfloat
*fptr
= (GLfloat
*)buf
;
110 switch (input
->Type
) {
112 CONVERT(GLbyte
, BYTE_TO_FLOAT
);
114 case GL_UNSIGNED_BYTE
:
115 CONVERT(GLubyte
, UBYTE_TO_FLOAT
);
118 CONVERT(GLshort
, SHORT_TO_FLOAT
);
120 case GL_UNSIGNED_SHORT
:
121 CONVERT(GLushort
, USHORT_TO_FLOAT
);
124 CONVERT(GLint
, INT_TO_FLOAT
);
126 case GL_UNSIGNED_INT
:
127 CONVERT(GLuint
, UINT_TO_FLOAT
);
130 CONVERT(GLdouble
, (GLfloat
));
138 stride
= sz
* sizeof(GLfloat
);
141 VB
->AttribPtr
[attrib
] = &tnl
->tmp_inputs
[attrib
];
142 VB
->AttribPtr
[attrib
]->data
= (GLfloat (*)[4])ptr
;
143 VB
->AttribPtr
[attrib
]->start
= (GLfloat
*)ptr
;
144 VB
->AttribPtr
[attrib
]->count
= count
;
145 VB
->AttribPtr
[attrib
]->stride
= stride
;
146 VB
->AttribPtr
[attrib
]->size
= input
->Size
;
148 /* This should die, but so should the whole GLvector4f concept:
150 VB
->AttribPtr
[attrib
]->flags
= (((1<<input
->Size
)-1) |
152 (stride
== 4*sizeof(GLfloat
) ? 0 : VEC_BAD_STRIDE
));
154 VB
->AttribPtr
[attrib
]->storage
= NULL
;
157 #define CLIPVERTS ((6 + MAX_CLIP_PLANES) * 2)
160 static GLboolean
*_tnl_import_edgeflag( GLcontext
*ctx
,
161 const GLvector4f
*input
,
164 const GLubyte
*ptr
= (const GLubyte
*)input
->data
;
165 const GLuint stride
= input
->stride
;
166 GLboolean
*space
= (GLboolean
*)get_space(ctx
, count
+ CLIPVERTS
);
167 GLboolean
*bptr
= space
;
170 for (i
= 0; i
< count
; i
++) {
171 *bptr
++ = ((GLfloat
*)ptr
)[0] == 1.0;
179 static void bind_inputs( GLcontext
*ctx
,
180 const struct gl_client_array
*inputs
[],
182 struct gl_buffer_object
**bo
,
185 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
186 struct vertex_buffer
*VB
= &tnl
->vb
;
191 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
194 if (inputs
[i
]->BufferObj
->Name
) {
195 if (!inputs
[i
]->BufferObj
->Pointer
) {
196 bo
[*nr_bo
] = inputs
[i
]->BufferObj
;
198 ctx
->Driver
.MapBuffer(ctx
,
201 inputs
[i
]->BufferObj
);
203 assert(inputs
[i
]->BufferObj
->Pointer
);
206 ptr
= ADD_POINTERS(inputs
[i
]->BufferObj
->Pointer
,
210 ptr
= inputs
[i
]->Ptr
;
212 /* Just make sure the array is floating point, otherwise convert to
215 * XXX: remove the GLvector4f type at some stage and just use
218 _tnl_import_array(ctx
, i
, count
, inputs
[i
], ptr
);
221 /* We process only the vertices between min & max index:
226 /* Legacy pointers -- remove one day.
228 VB
->ObjPtr
= VB
->AttribPtr
[_TNL_ATTRIB_POS
];
229 VB
->NormalPtr
= VB
->AttribPtr
[_TNL_ATTRIB_NORMAL
];
230 VB
->ColorPtr
[0] = VB
->AttribPtr
[_TNL_ATTRIB_COLOR0
];
231 VB
->ColorPtr
[1] = NULL
;
232 VB
->IndexPtr
[0] = VB
->AttribPtr
[_TNL_ATTRIB_COLOR_INDEX
];
233 VB
->IndexPtr
[1] = NULL
;
234 VB
->SecondaryColorPtr
[0] = VB
->AttribPtr
[_TNL_ATTRIB_COLOR1
];
235 VB
->SecondaryColorPtr
[1] = NULL
;
236 VB
->FogCoordPtr
= VB
->AttribPtr
[_TNL_ATTRIB_FOG
];
238 for (i
= 0; i
< ctx
->Const
.MaxTextureCoordUnits
; i
++) {
239 VB
->TexCoordPtr
[i
] = VB
->AttribPtr
[_TNL_ATTRIB_TEX0
+ i
];
242 /* Clipping and drawing code still requires this to be a packed
243 * array of ubytes which can be written into. TODO: Fix and
246 if (ctx
->Polygon
.FrontMode
!= GL_FILL
||
247 ctx
->Polygon
.BackMode
!= GL_FILL
)
249 VB
->EdgeFlag
= _tnl_import_edgeflag( ctx
,
250 VB
->AttribPtr
[_TNL_ATTRIB_EDGEFLAG
],
254 /* the data previously pointed to by EdgeFlag may have been freed */
260 /* Translate indices to GLuints and store in VB->Elts.
262 static void bind_indices( GLcontext
*ctx
,
263 const struct _mesa_index_buffer
*ib
,
264 struct gl_buffer_object
**bo
,
267 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
268 struct vertex_buffer
*VB
= &tnl
->vb
;
277 if (ib
->obj
->Name
&& !ib
->obj
->Pointer
) {
278 bo
[*nr_bo
] = ib
->obj
;
280 ctx
->Driver
.MapBuffer(ctx
,
281 GL_ELEMENT_ARRAY_BUFFER
,
285 assert(ib
->obj
->Pointer
);
288 ptr
= ADD_POINTERS(ib
->obj
->Pointer
, ib
->ptr
);
290 if (ib
->type
== GL_UNSIGNED_INT
) {
291 VB
->Elts
= (GLuint
*) ptr
;
294 GLuint
*elts
= (GLuint
*)get_space(ctx
, ib
->count
* sizeof(GLuint
));
297 if (ib
->type
== GL_UNSIGNED_SHORT
) {
298 const GLushort
*in
= (GLushort
*)ptr
;
299 for (i
= 0; i
< ib
->count
; i
++)
300 *elts
++ = (GLuint
)(*in
++);
303 const GLubyte
*in
= (GLubyte
*)ptr
;
304 for (i
= 0; i
< ib
->count
; i
++)
305 *elts
++ = (GLuint
)(*in
++);
310 static void bind_prims( GLcontext
*ctx
,
311 const struct _mesa_prim
*prim
,
314 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
315 struct vertex_buffer
*VB
= &tnl
->vb
;
317 VB
->Primitive
= prim
;
318 VB
->PrimitiveCount
= nr_prims
;
321 static void unmap_vbos( GLcontext
*ctx
,
322 struct gl_buffer_object
**bo
,
326 for (i
= 0; i
< nr_bo
; i
++) {
327 ctx
->Driver
.UnmapBuffer(ctx
,
328 0, /* target -- I don't see why this would be needed */
335 /* This is the main entrypoint into the slimmed-down software tnl
336 * module. In a regular swtnl driver, this can be plugged straight
337 * into the vbo->Driver.DrawPrims() callback.
339 void _tnl_draw_prims( GLcontext
*ctx
,
340 const struct gl_client_array
*arrays
[],
341 const struct _mesa_prim
*prim
,
343 const struct _mesa_index_buffer
*ib
,
347 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
348 const GLuint TEST_SPLIT
= 0;
349 const GLint max
= TEST_SPLIT
? 8 : tnl
->vb
.Size
- MAX_CLIPPED_VERTICES
;
354 _mesa_printf("%s %d..%d\n", __FUNCTION__
, min_index
, max_index
);
355 for (i
= 0; i
< nr_prims
; i
++)
356 _mesa_printf("prim %d: %s start %d count %d\n", i
,
357 _mesa_lookup_enum_by_nr(prim
[i
].mode
),
363 /* We always translate away calls with min_index != 0.
365 vbo_rebase_prims( ctx
, arrays
, prim
, nr_prims
, ib
,
366 min_index
, max_index
,
370 else if (max_index
> max
) {
371 /* The software TNL pipeline has a fixed amount of storage for
372 * vertices and it is necessary to split incoming drawing commands
373 * if they exceed that limit.
375 struct split_limits limits
;
376 limits
.max_verts
= max
;
377 limits
.max_vb_size
= ~0;
378 limits
.max_indices
= ~0;
380 /* This will split the buffers one way or another and
381 * recursively call back into this function.
383 vbo_split_prims( ctx
, arrays
, prim
, nr_prims
, ib
,
389 /* May need to map a vertex buffer object for every attribute plus
390 * one for the index buffer.
392 struct gl_buffer_object
*bo
[VERT_ATTRIB_MAX
+ 1];
395 /* Binding inputs may imply mapping some vertex buffer objects.
396 * They will need to be unmapped below.
398 bind_inputs(ctx
, arrays
, max_index
+1, bo
, &nr_bo
);
399 bind_indices(ctx
, ib
, bo
, &nr_bo
);
400 bind_prims(ctx
, prim
, nr_prims
);
402 TNL_CONTEXT(ctx
)->Driver
.RunPipeline(ctx
);
404 unmap_vbos(ctx
, bo
, nr_bo
);