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/mtypes.h"
33 #include "main/macros.h"
34 #include "main/enums.h"
36 #include "t_context.h"
41 static GLubyte
*get_space(struct gl_context
*ctx
, GLuint bytes
)
43 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
44 GLubyte
*space
= malloc(bytes
);
46 tnl
->block
[tnl
->nr_blocks
++] = space
;
51 static void free_space(struct gl_context
*ctx
)
53 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
55 for (i
= 0; i
< tnl
->nr_blocks
; i
++)
61 /* Convert the incoming array to GLfloats. Understands the
62 * array->Normalized flag and selects the correct conversion method.
64 #define CONVERT( TYPE, MACRO ) do { \
66 if (input->Normalized) { \
67 for (i = 0; i < count; i++) { \
68 const TYPE *in = (TYPE *)ptr; \
69 for (j = 0; j < sz; j++) { \
70 *fptr++ = MACRO(*in); \
73 ptr += input->StrideB; \
76 for (i = 0; i < count; i++) { \
77 const TYPE *in = (TYPE *)ptr; \
78 for (j = 0; j < sz; j++) { \
79 *fptr++ = (GLfloat)(*in); \
82 ptr += input->StrideB; \
89 * Convert array of BGRA/GLubyte[4] values to RGBA/float[4]
90 * \param ptr input/ubyte array
91 * \param fptr output/float array
94 convert_bgra_to_float(const struct gl_client_array
*input
,
95 const GLubyte
*ptr
, GLfloat
*fptr
,
99 assert(input
->Normalized
);
100 assert(input
->Size
== 4);
101 for (i
= 0; i
< count
; i
++) {
102 const GLubyte
*in
= (GLubyte
*) ptr
; /* in is in BGRA order */
103 *fptr
++ = UBYTE_TO_FLOAT(in
[2]); /* red */
104 *fptr
++ = UBYTE_TO_FLOAT(in
[1]); /* green */
105 *fptr
++ = UBYTE_TO_FLOAT(in
[0]); /* blue */
106 *fptr
++ = UBYTE_TO_FLOAT(in
[3]); /* alpha */
107 ptr
+= input
->StrideB
;
112 convert_half_to_float(const struct gl_client_array
*input
,
113 const GLubyte
*ptr
, GLfloat
*fptr
,
114 GLuint count
, GLuint sz
)
118 for (i
= 0; i
< count
; i
++) {
119 GLhalfARB
*in
= (GLhalfARB
*)ptr
;
121 for (j
= 0; j
< sz
; j
++) {
122 *fptr
++ = _mesa_half_to_float(in
[j
]);
124 ptr
+= input
->StrideB
;
129 * \brief Convert fixed-point to floating-point.
131 * In OpenGL, a fixed-point number is a "signed 2's complement 16.16 scaled
132 * integer" (Table 2.2 of the OpenGL ES 2.0 spec).
134 * If the buffer has the \c normalized flag set, the formula
135 * \code normalize(x) := (2*x + 1) / (2^16 - 1) \endcode
136 * is used to map the fixed-point numbers into the range [-1, 1].
139 convert_fixed_to_float(const struct gl_client_array
*input
,
140 const GLubyte
*ptr
, GLfloat
*fptr
,
144 const GLint size
= input
->Size
;
146 if (input
->Normalized
) {
147 for (i
= 0; i
< count
; ++i
) {
148 const GLfixed
*in
= (GLfixed
*) ptr
;
149 for (j
= 0; j
< size
; ++j
) {
150 *fptr
++ = (GLfloat
) (2 * in
[j
] + 1) / (GLfloat
) ((1 << 16) - 1);
152 ptr
+= input
->StrideB
;
155 for (i
= 0; i
< count
; ++i
) {
156 const GLfixed
*in
= (GLfixed
*) ptr
;
157 for (j
= 0; j
< size
; ++j
) {
158 *fptr
++ = in
[j
] / (GLfloat
) (1 << 16);
160 ptr
+= input
->StrideB
;
165 /* Adjust pointer to point at first requested element, convert to
166 * floating point, populate VB->AttribPtr[].
168 static void _tnl_import_array( struct gl_context
*ctx
,
171 const struct gl_client_array
*input
,
174 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
175 struct vertex_buffer
*VB
= &tnl
->vb
;
176 GLuint stride
= input
->StrideB
;
178 if (input
->Type
!= GL_FLOAT
) {
179 const GLuint sz
= input
->Size
;
180 GLubyte
*buf
= get_space(ctx
, count
* sz
* sizeof(GLfloat
));
181 GLfloat
*fptr
= (GLfloat
*)buf
;
183 switch (input
->Type
) {
185 CONVERT(GLbyte
, BYTE_TO_FLOAT
);
187 case GL_UNSIGNED_BYTE
:
188 if (input
->Format
== GL_BGRA
) {
189 /* See GL_EXT_vertex_array_bgra */
190 convert_bgra_to_float(input
, ptr
, fptr
, count
);
193 CONVERT(GLubyte
, UBYTE_TO_FLOAT
);
197 CONVERT(GLshort
, SHORT_TO_FLOAT
);
199 case GL_UNSIGNED_SHORT
:
200 CONVERT(GLushort
, USHORT_TO_FLOAT
);
203 CONVERT(GLint
, INT_TO_FLOAT
);
205 case GL_UNSIGNED_INT
:
206 CONVERT(GLuint
, UINT_TO_FLOAT
);
209 CONVERT(GLdouble
, (GLfloat
));
212 convert_half_to_float(input
, ptr
, fptr
, count
, sz
);
215 convert_fixed_to_float(input
, ptr
, fptr
, count
);
223 stride
= sz
* sizeof(GLfloat
);
226 VB
->AttribPtr
[attrib
] = &tnl
->tmp_inputs
[attrib
];
227 VB
->AttribPtr
[attrib
]->data
= (GLfloat (*)[4])ptr
;
228 VB
->AttribPtr
[attrib
]->start
= (GLfloat
*)ptr
;
229 VB
->AttribPtr
[attrib
]->count
= count
;
230 VB
->AttribPtr
[attrib
]->stride
= stride
;
231 VB
->AttribPtr
[attrib
]->size
= input
->Size
;
233 /* This should die, but so should the whole GLvector4f concept:
235 VB
->AttribPtr
[attrib
]->flags
= (((1<<input
->Size
)-1) |
237 (stride
== 4*sizeof(GLfloat
) ? 0 : VEC_BAD_STRIDE
));
239 VB
->AttribPtr
[attrib
]->storage
= NULL
;
242 #define CLIPVERTS ((6 + MAX_CLIP_PLANES) * 2)
245 static GLboolean
*_tnl_import_edgeflag( struct gl_context
*ctx
,
246 const GLvector4f
*input
,
249 const GLubyte
*ptr
= (const GLubyte
*)input
->data
;
250 const GLuint stride
= input
->stride
;
251 GLboolean
*space
= (GLboolean
*)get_space(ctx
, count
+ CLIPVERTS
);
252 GLboolean
*bptr
= space
;
255 for (i
= 0; i
< count
; i
++) {
256 *bptr
++ = ((GLfloat
*)ptr
)[0] == 1.0;
264 static void bind_inputs( struct gl_context
*ctx
,
265 const struct gl_client_array
*inputs
[],
267 struct gl_buffer_object
**bo
,
270 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
271 struct vertex_buffer
*VB
= &tnl
->vb
;
276 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
279 if (inputs
[i
]->BufferObj
->Name
) {
280 if (!inputs
[i
]->BufferObj
->Pointer
) {
281 bo
[*nr_bo
] = inputs
[i
]->BufferObj
;
283 ctx
->Driver
.MapBuffer(ctx
,
286 inputs
[i
]->BufferObj
);
288 assert(inputs
[i
]->BufferObj
->Pointer
);
291 ptr
= ADD_POINTERS(inputs
[i
]->BufferObj
->Pointer
,
295 ptr
= inputs
[i
]->Ptr
;
297 /* Just make sure the array is floating point, otherwise convert to
300 * XXX: remove the GLvector4f type at some stage and just use
303 _tnl_import_array(ctx
, i
, count
, inputs
[i
], ptr
);
306 /* We process only the vertices between min & max index:
310 /* These should perhaps be part of _TNL_ATTRIB_* */
311 VB
->BackfaceColorPtr
= NULL
;
312 VB
->BackfaceIndexPtr
= NULL
;
313 VB
->BackfaceSecondaryColorPtr
= NULL
;
315 /* Clipping and drawing code still requires this to be a packed
316 * array of ubytes which can be written into. TODO: Fix and
319 if (ctx
->Polygon
.FrontMode
!= GL_FILL
||
320 ctx
->Polygon
.BackMode
!= GL_FILL
)
322 VB
->EdgeFlag
= _tnl_import_edgeflag( ctx
,
323 VB
->AttribPtr
[_TNL_ATTRIB_EDGEFLAG
],
327 /* the data previously pointed to by EdgeFlag may have been freed */
333 /* Translate indices to GLuints and store in VB->Elts.
335 static void bind_indices( struct gl_context
*ctx
,
336 const struct _mesa_index_buffer
*ib
,
337 struct gl_buffer_object
**bo
,
340 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
341 struct vertex_buffer
*VB
= &tnl
->vb
;
350 if (ib
->obj
->Name
&& !ib
->obj
->Pointer
) {
351 bo
[*nr_bo
] = ib
->obj
;
353 ctx
->Driver
.MapBuffer(ctx
,
354 GL_ELEMENT_ARRAY_BUFFER
,
358 assert(ib
->obj
->Pointer
);
361 ptr
= ADD_POINTERS(ib
->obj
->Pointer
, ib
->ptr
);
363 if (ib
->type
== GL_UNSIGNED_INT
&& VB
->Primitive
[0].basevertex
== 0) {
364 VB
->Elts
= (GLuint
*) ptr
;
367 GLuint
*elts
= (GLuint
*)get_space(ctx
, ib
->count
* sizeof(GLuint
));
370 if (ib
->type
== GL_UNSIGNED_INT
) {
371 const GLuint
*in
= (GLuint
*)ptr
;
372 for (i
= 0; i
< ib
->count
; i
++)
373 *elts
++ = (GLuint
)(*in
++) + VB
->Primitive
[0].basevertex
;
375 else if (ib
->type
== GL_UNSIGNED_SHORT
) {
376 const GLushort
*in
= (GLushort
*)ptr
;
377 for (i
= 0; i
< ib
->count
; i
++)
378 *elts
++ = (GLuint
)(*in
++) + VB
->Primitive
[0].basevertex
;
381 const GLubyte
*in
= (GLubyte
*)ptr
;
382 for (i
= 0; i
< ib
->count
; i
++)
383 *elts
++ = (GLuint
)(*in
++) + VB
->Primitive
[0].basevertex
;
388 static void bind_prims( struct gl_context
*ctx
,
389 const struct _mesa_prim
*prim
,
392 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
393 struct vertex_buffer
*VB
= &tnl
->vb
;
395 VB
->Primitive
= prim
;
396 VB
->PrimitiveCount
= nr_prims
;
399 static void unmap_vbos( struct gl_context
*ctx
,
400 struct gl_buffer_object
**bo
,
404 for (i
= 0; i
< nr_bo
; i
++) {
405 ctx
->Driver
.UnmapBuffer(ctx
,
406 0, /* target -- I don't see why this would be needed */
412 void _tnl_vbo_draw_prims(struct gl_context
*ctx
,
413 const struct gl_client_array
*arrays
[],
414 const struct _mesa_prim
*prim
,
416 const struct _mesa_index_buffer
*ib
,
417 GLboolean index_bounds_valid
,
421 if (!index_bounds_valid
)
422 vbo_get_minmax_index(ctx
, prim
, ib
, &min_index
, &max_index
);
424 _tnl_draw_prims(ctx
, arrays
, prim
, nr_prims
, ib
, min_index
, max_index
);
427 /* This is the main entrypoint into the slimmed-down software tnl
428 * module. In a regular swtnl driver, this can be plugged straight
429 * into the vbo->Driver.DrawPrims() callback.
431 void _tnl_draw_prims( struct gl_context
*ctx
,
432 const struct gl_client_array
*arrays
[],
433 const struct _mesa_prim
*prim
,
435 const struct _mesa_index_buffer
*ib
,
439 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
440 const GLuint TEST_SPLIT
= 0;
441 const GLint max
= TEST_SPLIT
? 8 : tnl
->vb
.Size
- MAX_CLIPPED_VERTICES
;
442 GLint max_basevertex
= prim
->basevertex
;
445 /* Mesa core state should have been validated already */
446 assert(ctx
->NewState
== 0x0);
448 if (!_mesa_check_conditional_render(ctx
))
449 return; /* don't draw */
451 for (i
= 1; i
< nr_prims
; i
++)
452 max_basevertex
= MAX2(max_basevertex
, prim
[i
].basevertex
);
456 printf("%s %d..%d\n", __FUNCTION__
, min_index
, max_index
);
457 for (i
= 0; i
< nr_prims
; i
++)
458 printf("prim %d: %s start %d count %d\n", i
,
459 _mesa_lookup_enum_by_nr(prim
[i
].mode
),
465 /* We always translate away calls with min_index != 0.
467 vbo_rebase_prims( ctx
, arrays
, prim
, nr_prims
, ib
,
468 min_index
, max_index
,
469 _tnl_vbo_draw_prims
);
472 else if ((GLint
)max_index
+ max_basevertex
> max
) {
473 /* The software TNL pipeline has a fixed amount of storage for
474 * vertices and it is necessary to split incoming drawing commands
475 * if they exceed that limit.
477 struct split_limits limits
;
478 limits
.max_verts
= max
;
479 limits
.max_vb_size
= ~0;
480 limits
.max_indices
= ~0;
482 /* This will split the buffers one way or another and
483 * recursively call back into this function.
485 vbo_split_prims( ctx
, arrays
, prim
, nr_prims
, ib
,
486 0, max_index
+ prim
->basevertex
,
491 /* May need to map a vertex buffer object for every attribute plus
492 * one for the index buffer.
494 struct gl_buffer_object
*bo
[VERT_ATTRIB_MAX
+ 1];
498 for (i
= 0; i
< nr_prims
;) {
499 GLuint this_nr_prims
;
501 /* Our SW TNL pipeline doesn't handle basevertex yet, so bind_indices
502 * will rebase the elements to the basevertex, and we'll only
503 * emit strings of prims with the same basevertex in one draw call.
505 for (this_nr_prims
= 1; i
+ this_nr_prims
< nr_prims
;
507 if (prim
[i
].basevertex
!= prim
[i
+ this_nr_prims
].basevertex
)
511 assert(prim
[i
].num_instances
> 0);
513 /* Binding inputs may imply mapping some vertex buffer objects.
514 * They will need to be unmapped below.
516 for (inst
= 0; inst
< prim
[i
].num_instances
; inst
++) {
518 bind_prims(ctx
, &prim
[i
], this_nr_prims
);
519 bind_inputs(ctx
, arrays
, max_index
+ prim
[i
].basevertex
+ 1,
521 bind_indices(ctx
, ib
, bo
, &nr_bo
);
523 tnl
->CurInstance
= inst
;
524 TNL_CONTEXT(ctx
)->Driver
.RunPipeline(ctx
);
526 unmap_vbos(ctx
, bo
, nr_bo
);