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>
28 #include "main/glheader.h"
29 #include "main/condrender.h"
30 #include "main/context.h"
31 #include "main/imports.h"
32 #include "main/state.h"
33 #include "main/mtypes.h"
34 #include "main/macros.h"
35 #include "main/enums.h"
37 #include "t_context.h"
38 #include "t_pipeline.h"
39 #include "t_vp_build.h"
45 static GLubyte
*get_space(GLcontext
*ctx
, GLuint bytes
)
47 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
48 GLubyte
*space
= _mesa_malloc(bytes
);
50 tnl
->block
[tnl
->nr_blocks
++] = space
;
55 static void free_space(GLcontext
*ctx
)
57 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
59 for (i
= 0; i
< tnl
->nr_blocks
; i
++)
60 _mesa_free(tnl
->block
[i
]);
65 /* Convert the incoming array to GLfloats. Understands the
66 * array->Normalized flag and selects the correct conversion method.
68 #define CONVERT( TYPE, MACRO ) do { \
70 if (input->Normalized) { \
71 for (i = 0; i < count; i++) { \
72 const TYPE *in = (TYPE *)ptr; \
73 for (j = 0; j < sz; j++) { \
74 *fptr++ = MACRO(*in); \
77 ptr += input->StrideB; \
80 for (i = 0; i < count; i++) { \
81 const TYPE *in = (TYPE *)ptr; \
82 for (j = 0; j < sz; j++) { \
83 *fptr++ = (GLfloat)(*in); \
86 ptr += input->StrideB; \
93 * Convert array of BGRA/GLubyte[4] values to RGBA/float[4]
94 * \param ptr input/ubyte array
95 * \param fptr output/float array
98 convert_bgra_to_float(const struct gl_client_array
*input
,
99 const GLubyte
*ptr
, GLfloat
*fptr
,
103 assert(input
->Normalized
);
104 assert(input
->Size
== 4);
105 for (i
= 0; i
< count
; i
++) {
106 const GLubyte
*in
= (GLubyte
*) ptr
; /* in is in BGRA order */
107 *fptr
++ = UBYTE_TO_FLOAT(in
[2]); /* red */
108 *fptr
++ = UBYTE_TO_FLOAT(in
[1]); /* green */
109 *fptr
++ = UBYTE_TO_FLOAT(in
[0]); /* blue */
110 *fptr
++ = UBYTE_TO_FLOAT(in
[3]); /* alpha */
111 ptr
+= input
->StrideB
;
116 /* Adjust pointer to point at first requested element, convert to
117 * floating point, populate VB->AttribPtr[].
119 static void _tnl_import_array( GLcontext
*ctx
,
122 const struct gl_client_array
*input
,
125 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
126 struct vertex_buffer
*VB
= &tnl
->vb
;
127 GLuint stride
= input
->StrideB
;
129 if (input
->Type
!= GL_FLOAT
) {
130 const GLuint sz
= input
->Size
;
131 GLubyte
*buf
= get_space(ctx
, count
* sz
* sizeof(GLfloat
));
132 GLfloat
*fptr
= (GLfloat
*)buf
;
134 switch (input
->Type
) {
136 CONVERT(GLbyte
, BYTE_TO_FLOAT
);
138 case GL_UNSIGNED_BYTE
:
139 if (input
->Format
== GL_BGRA
) {
140 /* See GL_EXT_vertex_array_bgra */
141 convert_bgra_to_float(input
, ptr
, fptr
, count
);
144 CONVERT(GLubyte
, UBYTE_TO_FLOAT
);
148 CONVERT(GLshort
, SHORT_TO_FLOAT
);
150 case GL_UNSIGNED_SHORT
:
151 CONVERT(GLushort
, USHORT_TO_FLOAT
);
154 CONVERT(GLint
, INT_TO_FLOAT
);
156 case GL_UNSIGNED_INT
:
157 CONVERT(GLuint
, UINT_TO_FLOAT
);
160 CONVERT(GLdouble
, (GLfloat
));
168 stride
= sz
* sizeof(GLfloat
);
171 VB
->AttribPtr
[attrib
] = &tnl
->tmp_inputs
[attrib
];
172 VB
->AttribPtr
[attrib
]->data
= (GLfloat (*)[4])ptr
;
173 VB
->AttribPtr
[attrib
]->start
= (GLfloat
*)ptr
;
174 VB
->AttribPtr
[attrib
]->count
= count
;
175 VB
->AttribPtr
[attrib
]->stride
= stride
;
176 VB
->AttribPtr
[attrib
]->size
= input
->Size
;
178 /* This should die, but so should the whole GLvector4f concept:
180 VB
->AttribPtr
[attrib
]->flags
= (((1<<input
->Size
)-1) |
182 (stride
== 4*sizeof(GLfloat
) ? 0 : VEC_BAD_STRIDE
));
184 VB
->AttribPtr
[attrib
]->storage
= NULL
;
187 #define CLIPVERTS ((6 + MAX_CLIP_PLANES) * 2)
190 static GLboolean
*_tnl_import_edgeflag( GLcontext
*ctx
,
191 const GLvector4f
*input
,
194 const GLubyte
*ptr
= (const GLubyte
*)input
->data
;
195 const GLuint stride
= input
->stride
;
196 GLboolean
*space
= (GLboolean
*)get_space(ctx
, count
+ CLIPVERTS
);
197 GLboolean
*bptr
= space
;
200 for (i
= 0; i
< count
; i
++) {
201 *bptr
++ = ((GLfloat
*)ptr
)[0] == 1.0;
209 static void bind_inputs( GLcontext
*ctx
,
210 const struct gl_client_array
*inputs
[],
212 struct gl_buffer_object
**bo
,
215 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
216 struct vertex_buffer
*VB
= &tnl
->vb
;
221 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
224 if (inputs
[i
]->BufferObj
->Name
) {
225 if (!inputs
[i
]->BufferObj
->Pointer
) {
226 bo
[*nr_bo
] = inputs
[i
]->BufferObj
;
228 ctx
->Driver
.MapBuffer(ctx
,
231 inputs
[i
]->BufferObj
);
233 assert(inputs
[i
]->BufferObj
->Pointer
);
236 ptr
= ADD_POINTERS(inputs
[i
]->BufferObj
->Pointer
,
240 ptr
= inputs
[i
]->Ptr
;
242 /* Just make sure the array is floating point, otherwise convert to
245 * XXX: remove the GLvector4f type at some stage and just use
248 _tnl_import_array(ctx
, i
, count
, inputs
[i
], ptr
);
251 /* We process only the vertices between min & max index:
255 /* These should perhaps be part of _TNL_ATTRIB_* */
256 VB
->BackfaceColorPtr
= NULL
;
257 VB
->BackfaceIndexPtr
= NULL
;
258 VB
->BackfaceSecondaryColorPtr
= NULL
;
260 /* Clipping and drawing code still requires this to be a packed
261 * array of ubytes which can be written into. TODO: Fix and
264 if (ctx
->Polygon
.FrontMode
!= GL_FILL
||
265 ctx
->Polygon
.BackMode
!= GL_FILL
)
267 VB
->EdgeFlag
= _tnl_import_edgeflag( ctx
,
268 VB
->AttribPtr
[_TNL_ATTRIB_EDGEFLAG
],
272 /* the data previously pointed to by EdgeFlag may have been freed */
278 /* Translate indices to GLuints and store in VB->Elts.
280 static void bind_indices( GLcontext
*ctx
,
281 const struct _mesa_index_buffer
*ib
,
282 struct gl_buffer_object
**bo
,
285 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
286 struct vertex_buffer
*VB
= &tnl
->vb
;
295 if (ib
->obj
->Name
&& !ib
->obj
->Pointer
) {
296 bo
[*nr_bo
] = ib
->obj
;
298 ctx
->Driver
.MapBuffer(ctx
,
299 GL_ELEMENT_ARRAY_BUFFER
,
303 assert(ib
->obj
->Pointer
);
306 ptr
= ADD_POINTERS(ib
->obj
->Pointer
, ib
->ptr
);
308 if (ib
->type
== GL_UNSIGNED_INT
&& VB
->Primitive
[0].basevertex
== 0) {
309 VB
->Elts
= (GLuint
*) ptr
;
312 GLuint
*elts
= (GLuint
*)get_space(ctx
, ib
->count
* sizeof(GLuint
));
315 if (ib
->type
== GL_UNSIGNED_INT
) {
316 const GLuint
*in
= (GLuint
*)ptr
;
317 for (i
= 0; i
< ib
->count
; i
++)
318 *elts
++ = (GLuint
)(*in
++) + VB
->Primitive
[0].basevertex
;
320 else if (ib
->type
== GL_UNSIGNED_SHORT
) {
321 const GLushort
*in
= (GLushort
*)ptr
;
322 for (i
= 0; i
< ib
->count
; i
++)
323 *elts
++ = (GLuint
)(*in
++) + VB
->Primitive
[0].basevertex
;
326 const GLubyte
*in
= (GLubyte
*)ptr
;
327 for (i
= 0; i
< ib
->count
; i
++)
328 *elts
++ = (GLuint
)(*in
++) + VB
->Primitive
[0].basevertex
;
333 static void bind_prims( GLcontext
*ctx
,
334 const struct _mesa_prim
*prim
,
337 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
338 struct vertex_buffer
*VB
= &tnl
->vb
;
340 VB
->Primitive
= prim
;
341 VB
->PrimitiveCount
= nr_prims
;
344 static void unmap_vbos( GLcontext
*ctx
,
345 struct gl_buffer_object
**bo
,
349 for (i
= 0; i
< nr_bo
; i
++) {
350 ctx
->Driver
.UnmapBuffer(ctx
,
351 0, /* target -- I don't see why this would be needed */
357 void _tnl_vbo_draw_prims(GLcontext
*ctx
,
358 const struct gl_client_array
*arrays
[],
359 const struct _mesa_prim
*prim
,
361 const struct _mesa_index_buffer
*ib
,
362 GLboolean index_bounds_valid
,
366 if (!index_bounds_valid
)
367 vbo_get_minmax_index(ctx
, prim
, ib
, &min_index
, &max_index
);
369 _tnl_draw_prims(ctx
, arrays
, prim
, nr_prims
, ib
, min_index
, max_index
);
372 /* This is the main entrypoint into the slimmed-down software tnl
373 * module. In a regular swtnl driver, this can be plugged straight
374 * into the vbo->Driver.DrawPrims() callback.
376 void _tnl_draw_prims( GLcontext
*ctx
,
377 const struct gl_client_array
*arrays
[],
378 const struct _mesa_prim
*prim
,
380 const struct _mesa_index_buffer
*ib
,
384 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
385 const GLuint TEST_SPLIT
= 0;
386 const GLint max
= TEST_SPLIT
? 8 : tnl
->vb
.Size
- MAX_CLIPPED_VERTICES
;
387 GLuint max_basevertex
= prim
->basevertex
;
390 if (!_mesa_check_conditional_render(ctx
))
391 return; /* don't draw */
393 for (i
= 1; i
< nr_prims
; i
++)
394 max_basevertex
= MAX2(max_basevertex
, prim
[i
].basevertex
);
398 _mesa_printf("%s %d..%d\n", __FUNCTION__
, min_index
, max_index
);
399 for (i
= 0; i
< nr_prims
; i
++)
400 _mesa_printf("prim %d: %s start %d count %d\n", i
,
401 _mesa_lookup_enum_by_nr(prim
[i
].mode
),
407 /* We always translate away calls with min_index != 0.
409 vbo_rebase_prims( ctx
, arrays
, prim
, nr_prims
, ib
,
410 min_index
, max_index
,
411 _tnl_vbo_draw_prims
);
414 else if (max_index
+ max_basevertex
> max
) {
415 /* The software TNL pipeline has a fixed amount of storage for
416 * vertices and it is necessary to split incoming drawing commands
417 * if they exceed that limit.
419 struct split_limits limits
;
420 limits
.max_verts
= max
;
421 limits
.max_vb_size
= ~0;
422 limits
.max_indices
= ~0;
424 /* This will split the buffers one way or another and
425 * recursively call back into this function.
427 vbo_split_prims( ctx
, arrays
, prim
, nr_prims
, ib
,
428 0, max_index
+ prim
->basevertex
,
433 /* May need to map a vertex buffer object for every attribute plus
434 * one for the index buffer.
436 struct gl_buffer_object
*bo
[VERT_ATTRIB_MAX
+ 1];
439 for (i
= 0; i
< nr_prims
;) {
440 GLuint this_nr_prims
;
442 /* Our SW TNL pipeline doesn't handle basevertex yet, so bind_indices
443 * will rebase the elements to the basevertex, and we'll only
444 * emit strings of prims with the same basevertex in one draw call.
446 for (this_nr_prims
= 1; i
+ this_nr_prims
< nr_prims
;
448 if (prim
[i
].basevertex
!= prim
[i
+ this_nr_prims
].basevertex
)
452 /* Binding inputs may imply mapping some vertex buffer objects.
453 * They will need to be unmapped below.
455 bind_prims(ctx
, &prim
[i
], this_nr_prims
);
456 bind_inputs(ctx
, arrays
, max_index
+ prim
[i
].basevertex
+ 1,
458 bind_indices(ctx
, ib
, bo
, &nr_bo
);
460 TNL_CONTEXT(ctx
)->Driver
.RunPipeline(ctx
);
462 unmap_vbos(ctx
, bo
, nr_bo
);