1 /**************************************************************************
3 * Copyright 2007 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 **************************************************************************/
29 * This file implements the st_draw_vbo() function which is called from
30 * Mesa's VBO module. All point/line/triangle rendering is done through
31 * this function whether the user called glBegin/End, glDrawArrays,
32 * glDrawElements, glEvalMesh, or glCalList, etc.
34 * We basically convert the VBO's vertex attribute/array information into
35 * Gallium vertex state, bind the vertex buffer objects and call
39 * Keith Whitwell <keith@tungstengraphics.com>
43 #include "main/imports.h"
44 #include "main/image.h"
45 #include "main/bufferobj.h"
46 #include "main/macros.h"
47 #include "main/mfeatures.h"
51 #include "st_context.h"
53 #include "st_cb_bufferobjects.h"
54 #include "st_cb_xformfb.h"
56 #include "st_program.h"
58 #include "pipe/p_context.h"
59 #include "pipe/p_defines.h"
60 #include "util/u_inlines.h"
61 #include "util/u_format.h"
62 #include "util/u_prim.h"
63 #include "util/u_draw_quad.h"
64 #include "util/u_upload_mgr.h"
65 #include "draw/draw_context.h"
66 #include "cso_cache/cso_context.h"
68 #include "../glsl/ir_uniform.h"
71 static GLuint double_types
[4] = {
72 PIPE_FORMAT_R64_FLOAT
,
73 PIPE_FORMAT_R64G64_FLOAT
,
74 PIPE_FORMAT_R64G64B64_FLOAT
,
75 PIPE_FORMAT_R64G64B64A64_FLOAT
78 static GLuint float_types
[4] = {
79 PIPE_FORMAT_R32_FLOAT
,
80 PIPE_FORMAT_R32G32_FLOAT
,
81 PIPE_FORMAT_R32G32B32_FLOAT
,
82 PIPE_FORMAT_R32G32B32A32_FLOAT
85 static GLuint half_float_types
[4] = {
86 PIPE_FORMAT_R16_FLOAT
,
87 PIPE_FORMAT_R16G16_FLOAT
,
88 PIPE_FORMAT_R16G16B16_FLOAT
,
89 PIPE_FORMAT_R16G16B16A16_FLOAT
92 static GLuint uint_types_norm
[4] = {
93 PIPE_FORMAT_R32_UNORM
,
94 PIPE_FORMAT_R32G32_UNORM
,
95 PIPE_FORMAT_R32G32B32_UNORM
,
96 PIPE_FORMAT_R32G32B32A32_UNORM
99 static GLuint uint_types_scale
[4] = {
100 PIPE_FORMAT_R32_USCALED
,
101 PIPE_FORMAT_R32G32_USCALED
,
102 PIPE_FORMAT_R32G32B32_USCALED
,
103 PIPE_FORMAT_R32G32B32A32_USCALED
106 static GLuint uint_types_int
[4] = {
107 PIPE_FORMAT_R32_UINT
,
108 PIPE_FORMAT_R32G32_UINT
,
109 PIPE_FORMAT_R32G32B32_UINT
,
110 PIPE_FORMAT_R32G32B32A32_UINT
113 static GLuint int_types_norm
[4] = {
114 PIPE_FORMAT_R32_SNORM
,
115 PIPE_FORMAT_R32G32_SNORM
,
116 PIPE_FORMAT_R32G32B32_SNORM
,
117 PIPE_FORMAT_R32G32B32A32_SNORM
120 static GLuint int_types_scale
[4] = {
121 PIPE_FORMAT_R32_SSCALED
,
122 PIPE_FORMAT_R32G32_SSCALED
,
123 PIPE_FORMAT_R32G32B32_SSCALED
,
124 PIPE_FORMAT_R32G32B32A32_SSCALED
127 static GLuint int_types_int
[4] = {
128 PIPE_FORMAT_R32_SINT
,
129 PIPE_FORMAT_R32G32_SINT
,
130 PIPE_FORMAT_R32G32B32_SINT
,
131 PIPE_FORMAT_R32G32B32A32_SINT
134 static GLuint ushort_types_norm
[4] = {
135 PIPE_FORMAT_R16_UNORM
,
136 PIPE_FORMAT_R16G16_UNORM
,
137 PIPE_FORMAT_R16G16B16_UNORM
,
138 PIPE_FORMAT_R16G16B16A16_UNORM
141 static GLuint ushort_types_scale
[4] = {
142 PIPE_FORMAT_R16_USCALED
,
143 PIPE_FORMAT_R16G16_USCALED
,
144 PIPE_FORMAT_R16G16B16_USCALED
,
145 PIPE_FORMAT_R16G16B16A16_USCALED
148 static GLuint ushort_types_int
[4] = {
149 PIPE_FORMAT_R16_UINT
,
150 PIPE_FORMAT_R16G16_UINT
,
151 PIPE_FORMAT_R16G16B16_UINT
,
152 PIPE_FORMAT_R16G16B16A16_UINT
155 static GLuint short_types_norm
[4] = {
156 PIPE_FORMAT_R16_SNORM
,
157 PIPE_FORMAT_R16G16_SNORM
,
158 PIPE_FORMAT_R16G16B16_SNORM
,
159 PIPE_FORMAT_R16G16B16A16_SNORM
162 static GLuint short_types_scale
[4] = {
163 PIPE_FORMAT_R16_SSCALED
,
164 PIPE_FORMAT_R16G16_SSCALED
,
165 PIPE_FORMAT_R16G16B16_SSCALED
,
166 PIPE_FORMAT_R16G16B16A16_SSCALED
169 static GLuint short_types_int
[4] = {
170 PIPE_FORMAT_R16_SINT
,
171 PIPE_FORMAT_R16G16_SINT
,
172 PIPE_FORMAT_R16G16B16_SINT
,
173 PIPE_FORMAT_R16G16B16A16_SINT
176 static GLuint ubyte_types_norm
[4] = {
177 PIPE_FORMAT_R8_UNORM
,
178 PIPE_FORMAT_R8G8_UNORM
,
179 PIPE_FORMAT_R8G8B8_UNORM
,
180 PIPE_FORMAT_R8G8B8A8_UNORM
183 static GLuint ubyte_types_scale
[4] = {
184 PIPE_FORMAT_R8_USCALED
,
185 PIPE_FORMAT_R8G8_USCALED
,
186 PIPE_FORMAT_R8G8B8_USCALED
,
187 PIPE_FORMAT_R8G8B8A8_USCALED
190 static GLuint ubyte_types_int
[4] = {
192 PIPE_FORMAT_R8G8_UINT
,
193 PIPE_FORMAT_R8G8B8_UINT
,
194 PIPE_FORMAT_R8G8B8A8_UINT
197 static GLuint byte_types_norm
[4] = {
198 PIPE_FORMAT_R8_SNORM
,
199 PIPE_FORMAT_R8G8_SNORM
,
200 PIPE_FORMAT_R8G8B8_SNORM
,
201 PIPE_FORMAT_R8G8B8A8_SNORM
204 static GLuint byte_types_scale
[4] = {
205 PIPE_FORMAT_R8_SSCALED
,
206 PIPE_FORMAT_R8G8_SSCALED
,
207 PIPE_FORMAT_R8G8B8_SSCALED
,
208 PIPE_FORMAT_R8G8B8A8_SSCALED
211 static GLuint byte_types_int
[4] = {
213 PIPE_FORMAT_R8G8_SINT
,
214 PIPE_FORMAT_R8G8B8_SINT
,
215 PIPE_FORMAT_R8G8B8A8_SINT
218 static GLuint fixed_types
[4] = {
219 PIPE_FORMAT_R32_FIXED
,
220 PIPE_FORMAT_R32G32_FIXED
,
221 PIPE_FORMAT_R32G32B32_FIXED
,
222 PIPE_FORMAT_R32G32B32A32_FIXED
228 * Return a PIPE_FORMAT_x for the given GL datatype and size.
231 st_pipe_vertex_format(GLenum type
, GLuint size
, GLenum format
,
232 GLboolean normalized
, GLboolean integer
)
234 assert((type
>= GL_BYTE
&& type
<= GL_DOUBLE
) ||
235 type
== GL_FIXED
|| type
== GL_HALF_FLOAT
||
236 type
== GL_INT_2_10_10_10_REV
||
237 type
== GL_UNSIGNED_INT_2_10_10_10_REV
);
240 assert(format
== GL_RGBA
|| format
== GL_BGRA
);
242 if (type
== GL_INT_2_10_10_10_REV
||
243 type
== GL_UNSIGNED_INT_2_10_10_10_REV
) {
247 if (format
== GL_BGRA
) {
248 if (type
== GL_INT_2_10_10_10_REV
) {
250 return PIPE_FORMAT_B10G10R10A2_SNORM
;
252 return PIPE_FORMAT_B10G10R10A2_SSCALED
;
255 return PIPE_FORMAT_B10G10R10A2_UNORM
;
257 return PIPE_FORMAT_B10G10R10A2_USCALED
;
260 if (type
== GL_INT_2_10_10_10_REV
) {
262 return PIPE_FORMAT_R10G10B10A2_SNORM
;
264 return PIPE_FORMAT_R10G10B10A2_SSCALED
;
267 return PIPE_FORMAT_R10G10B10A2_UNORM
;
269 return PIPE_FORMAT_R10G10B10A2_USCALED
;
274 if (format
== GL_BGRA
) {
275 /* this is an odd-ball case */
276 assert(type
== GL_UNSIGNED_BYTE
);
278 return PIPE_FORMAT_B8G8R8A8_UNORM
;
283 case GL_INT
: return int_types_int
[size
-1];
284 case GL_SHORT
: return short_types_int
[size
-1];
285 case GL_BYTE
: return byte_types_int
[size
-1];
286 case GL_UNSIGNED_INT
: return uint_types_int
[size
-1];
287 case GL_UNSIGNED_SHORT
: return ushort_types_int
[size
-1];
288 case GL_UNSIGNED_BYTE
: return ubyte_types_int
[size
-1];
289 default: assert(0); return 0;
292 else if (normalized
) {
294 case GL_DOUBLE
: return double_types
[size
-1];
295 case GL_FLOAT
: return float_types
[size
-1];
296 case GL_HALF_FLOAT
: return half_float_types
[size
-1];
297 case GL_INT
: return int_types_norm
[size
-1];
298 case GL_SHORT
: return short_types_norm
[size
-1];
299 case GL_BYTE
: return byte_types_norm
[size
-1];
300 case GL_UNSIGNED_INT
: return uint_types_norm
[size
-1];
301 case GL_UNSIGNED_SHORT
: return ushort_types_norm
[size
-1];
302 case GL_UNSIGNED_BYTE
: return ubyte_types_norm
[size
-1];
303 case GL_FIXED
: return fixed_types
[size
-1];
304 default: assert(0); return 0;
309 case GL_DOUBLE
: return double_types
[size
-1];
310 case GL_FLOAT
: return float_types
[size
-1];
311 case GL_HALF_FLOAT
: return half_float_types
[size
-1];
312 case GL_INT
: return int_types_scale
[size
-1];
313 case GL_SHORT
: return short_types_scale
[size
-1];
314 case GL_BYTE
: return byte_types_scale
[size
-1];
315 case GL_UNSIGNED_INT
: return uint_types_scale
[size
-1];
316 case GL_UNSIGNED_SHORT
: return ushort_types_scale
[size
-1];
317 case GL_UNSIGNED_BYTE
: return ubyte_types_scale
[size
-1];
318 case GL_FIXED
: return fixed_types
[size
-1];
319 default: assert(0); return 0;
322 return PIPE_FORMAT_NONE
; /* silence compiler warning */
327 * This is very similar to vbo_all_varyings_in_vbos() but we are
328 * only interested in per-vertex data. See bug 38626.
331 all_varyings_in_vbos(const struct gl_client_array
*arrays
[])
335 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++)
336 if (arrays
[i
]->StrideB
&&
337 !arrays
[i
]->InstanceDivisor
&&
338 !_mesa_is_bufferobj(arrays
[i
]->BufferObj
))
346 * Examine the active arrays to determine if we have interleaved
347 * vertex arrays all living in one VBO, or all living in user space.
350 is_interleaved_arrays(const struct st_vertex_program
*vp
,
351 const struct st_vp_variant
*vpv
,
352 const struct gl_client_array
**arrays
)
355 const struct gl_buffer_object
*firstBufObj
= NULL
;
356 GLint firstStride
= -1;
357 const GLubyte
*firstPtr
= NULL
;
358 GLboolean userSpaceBuffer
= GL_FALSE
;
360 for (attr
= 0; attr
< vpv
->num_inputs
; attr
++) {
361 const GLuint mesaAttr
= vp
->index_to_input
[attr
];
362 const struct gl_client_array
*array
= arrays
[mesaAttr
];
363 const struct gl_buffer_object
*bufObj
= array
->BufferObj
;
364 const GLsizei stride
= array
->StrideB
; /* in bytes */
367 /* save info about the first array */
368 firstStride
= stride
;
369 firstPtr
= array
->Ptr
;
370 firstBufObj
= bufObj
;
371 userSpaceBuffer
= !bufObj
|| !bufObj
->Name
;
374 /* check if other arrays interleave with the first, in same buffer */
375 if (stride
!= firstStride
)
376 return GL_FALSE
; /* strides don't match */
378 if (bufObj
!= firstBufObj
)
379 return GL_FALSE
; /* arrays in different VBOs */
381 if (abs(array
->Ptr
- firstPtr
) > firstStride
)
382 return GL_FALSE
; /* arrays start too far apart */
384 if ((!_mesa_is_bufferobj(bufObj
)) != userSpaceBuffer
)
385 return GL_FALSE
; /* mix of VBO and user-space arrays */
394 * Set up for drawing interleaved arrays that all live in one VBO
395 * or all live in user space.
396 * \param vbuffer returns vertex buffer info
397 * \param velements returns vertex element info
398 * \return GL_TRUE for success, GL_FALSE otherwise (probably out of memory)
401 setup_interleaved_attribs(struct gl_context
*ctx
,
402 const struct st_vertex_program
*vp
,
403 const struct st_vp_variant
*vpv
,
404 const struct gl_client_array
**arrays
,
405 struct pipe_vertex_buffer
*vbuffer
,
406 struct pipe_vertex_element velements
[])
409 const GLubyte
*low_addr
= NULL
;
410 GLboolean usingVBO
; /* all arrays in a VBO? */
411 struct gl_buffer_object
*bufobj
;
414 /* Find the lowest address of the arrays we're drawing,
415 * Init bufobj and stride.
417 if (vpv
->num_inputs
) {
418 const GLuint mesaAttr0
= vp
->index_to_input
[0];
419 const struct gl_client_array
*array
= arrays
[mesaAttr0
];
421 /* Since we're doing interleaved arrays, we know there'll be at most
422 * one buffer object and the stride will be the same for all arrays.
425 bufobj
= array
->BufferObj
;
426 stride
= array
->StrideB
;
428 low_addr
= arrays
[vp
->index_to_input
[0]]->Ptr
;
430 for (attr
= 1; attr
< vpv
->num_inputs
; attr
++) {
431 const GLubyte
*start
= arrays
[vp
->index_to_input
[attr
]]->Ptr
;
432 low_addr
= MIN2(low_addr
, start
);
436 /* not sure we'll ever have zero inputs, but play it safe */
442 /* are the arrays in user space? */
443 usingVBO
= _mesa_is_bufferobj(bufobj
);
445 for (attr
= 0; attr
< vpv
->num_inputs
; attr
++) {
446 const GLuint mesaAttr
= vp
->index_to_input
[attr
];
447 const struct gl_client_array
*array
= arrays
[mesaAttr
];
448 unsigned src_offset
= (unsigned) (array
->Ptr
- low_addr
);
449 GLuint element_size
= array
->_ElementSize
;
451 assert(element_size
== array
->Size
* _mesa_sizeof_type(array
->Type
));
453 velements
[attr
].src_offset
= src_offset
;
454 velements
[attr
].instance_divisor
= array
->InstanceDivisor
;
455 velements
[attr
].vertex_buffer_index
= 0;
456 velements
[attr
].src_format
= st_pipe_vertex_format(array
->Type
,
461 assert(velements
[attr
].src_format
);
465 * Return the vbuffer info and setup user-space attrib info, if needed.
467 if (vpv
->num_inputs
== 0) {
468 /* just defensive coding here */
469 vbuffer
->buffer
= NULL
;
470 vbuffer
->user_buffer
= NULL
;
471 vbuffer
->buffer_offset
= 0;
475 /* all interleaved arrays in a VBO */
476 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
478 if (!stobj
|| !stobj
->buffer
) {
479 /* probably out of memory (or zero-sized buffer) */
483 vbuffer
->buffer
= stobj
->buffer
;
484 vbuffer
->user_buffer
= NULL
;
485 vbuffer
->buffer_offset
= pointer_to_offset(low_addr
);
486 vbuffer
->stride
= stride
;
489 /* all interleaved arrays in user memory */
490 vbuffer
->buffer
= NULL
;
491 vbuffer
->user_buffer
= low_addr
;
492 vbuffer
->buffer_offset
= 0;
493 vbuffer
->stride
= stride
;
501 * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each
503 * \param vbuffer returns vertex buffer info
504 * \param velements returns vertex element info
505 * \return GL_TRUE for success, GL_FALSE otherwise (probably out of memory)
508 setup_non_interleaved_attribs(struct gl_context
*ctx
,
509 const struct st_vertex_program
*vp
,
510 const struct st_vp_variant
*vpv
,
511 const struct gl_client_array
**arrays
,
512 struct pipe_vertex_buffer vbuffer
[],
513 struct pipe_vertex_element velements
[])
517 for (attr
= 0; attr
< vpv
->num_inputs
; attr
++) {
518 const GLuint mesaAttr
= vp
->index_to_input
[attr
];
519 const struct gl_client_array
*array
= arrays
[mesaAttr
];
520 struct gl_buffer_object
*bufobj
= array
->BufferObj
;
521 GLsizei stride
= array
->StrideB
;
523 assert(array
->_ElementSize
== array
->Size
* _mesa_sizeof_type(array
->Type
));
525 if (_mesa_is_bufferobj(bufobj
)) {
526 /* Attribute data is in a VBO.
527 * Recall that for VBOs, the gl_client_array->Ptr field is
528 * really an offset from the start of the VBO, not a pointer.
530 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
532 if (!stobj
|| !stobj
->buffer
) {
533 /* probably out of memory (or zero-sized buffer) */
537 vbuffer
[attr
].buffer
= stobj
->buffer
;
538 vbuffer
[attr
].user_buffer
= NULL
;
539 vbuffer
[attr
].buffer_offset
= pointer_to_offset(array
->Ptr
);
546 ptr
= (void *) array
->Ptr
;
549 /* no array, use ctx->Current.Attrib[] value */
550 ptr
= (void *) ctx
->Current
.Attrib
[mesaAttr
];
556 vbuffer
[attr
].buffer
= NULL
;
557 vbuffer
[attr
].user_buffer
= ptr
;
558 vbuffer
[attr
].buffer_offset
= 0;
561 /* common-case setup */
562 vbuffer
[attr
].stride
= stride
; /* in bytes */
564 velements
[attr
].src_offset
= 0;
565 velements
[attr
].instance_divisor
= array
->InstanceDivisor
;
566 velements
[attr
].vertex_buffer_index
= attr
;
567 velements
[attr
].src_format
= st_pipe_vertex_format(array
->Type
,
572 assert(velements
[attr
].src_format
);
580 setup_index_buffer(struct st_context
*st
,
581 const struct _mesa_index_buffer
*ib
,
582 struct pipe_index_buffer
*ibuffer
)
584 struct gl_buffer_object
*bufobj
= ib
->obj
;
586 ibuffer
->index_size
= vbo_sizeof_ib_type(ib
->type
);
588 /* get/create the index buffer object */
589 if (_mesa_is_bufferobj(bufobj
)) {
590 /* indices are in a real VBO */
591 ibuffer
->buffer
= st_buffer_object(bufobj
)->buffer
;
592 ibuffer
->offset
= pointer_to_offset(ib
->ptr
);
594 else if (st
->indexbuf_uploader
) {
595 u_upload_data(st
->indexbuf_uploader
, 0, ib
->count
* ibuffer
->index_size
,
596 ib
->ptr
, &ibuffer
->offset
, &ibuffer
->buffer
);
597 u_upload_unmap(st
->indexbuf_uploader
);
600 /* indices are in user space memory */
601 ibuffer
->user_buffer
= ib
->ptr
;
604 cso_set_index_buffer(st
->cso_context
, ibuffer
);
609 * Prior to drawing, check that any uniforms referenced by the
610 * current shader have been set. If a uniform has not been set,
614 check_uniforms(struct gl_context
*ctx
)
616 struct gl_shader_program
*shProg
[3] = {
617 ctx
->Shader
.CurrentVertexProgram
,
618 ctx
->Shader
.CurrentGeometryProgram
,
619 ctx
->Shader
.CurrentFragmentProgram
,
623 for (j
= 0; j
< 3; j
++) {
626 if (shProg
[j
] == NULL
|| !shProg
[j
]->LinkStatus
)
629 for (i
= 0; i
< shProg
[j
]->NumUserUniformStorage
; i
++) {
630 const struct gl_uniform_storage
*u
= &shProg
[j
]->UniformStorage
[i
];
631 if (!u
->initialized
) {
633 "Using shader with uninitialized uniform: %s",
642 * Notes on primitive restart:
643 * The code below is used when the gallium driver does not support primitive
644 * restart itself. We map the index buffer, find the restart indexes, unmap
645 * the index buffer then draw the sub-primitives delineated by the restarts.
646 * A couple possible optimizations:
647 * 1. Save the list of sub-primitive (start, count) values in a list attached
648 * to the index buffer for re-use in subsequent draws. The list would be
649 * invalidated when the contents of the buffer changed.
650 * 2. If drawing triangle strips or quad strips, create a new index buffer
651 * that uses duplicated vertices to render the disjoint strips as one
652 * long strip. We'd have to be careful to avoid using too much memory
654 * Finally, some apps might perform better if they don't use primitive restart
655 * at all rather than this fallback path. Set MESA_EXTENSION_OVERRIDE to
656 * "-GL_NV_primitive_restart" to test that.
662 unsigned start
, count
;
667 * Scan the elements array to find restart indexes. Return a list
668 * of primitive (start,count) pairs to indicate how to draw the sub-
669 * primitives delineated by the restart index.
671 static struct sub_primitive
*
672 find_sub_primitives(const void *elements
, unsigned element_size
,
673 unsigned start
, unsigned end
, unsigned restart_index
,
674 unsigned *num_sub_prims
)
676 const unsigned max_prims
= end
- start
;
677 struct sub_primitive
*sub_prims
;
678 unsigned i
, cur_start
, cur_count
, num
;
680 sub_prims
= (struct sub_primitive
*)
681 malloc(max_prims
* sizeof(struct sub_primitive
));
692 #define SCAN_ELEMENTS(TYPE) \
693 for (i = start; i < end; i++) { \
694 if (((const TYPE *) elements)[i] == restart_index) { \
695 if (cur_count > 0) { \
696 assert(num < max_prims); \
697 sub_prims[num].start = cur_start; \
698 sub_prims[num].count = cur_count; \
708 if (cur_count > 0) { \
709 assert(num < max_prims); \
710 sub_prims[num].start = cur_start; \
711 sub_prims[num].count = cur_count; \
715 switch (element_size
) {
717 SCAN_ELEMENTS(ubyte
);
720 SCAN_ELEMENTS(ushort
);
726 assert(0 && "bad index_size in find_sub_primitives()");
731 *num_sub_prims
= num
;
738 * For gallium drivers that don't support the primitive restart
739 * feature, handle it here by breaking up the indexed primitive into
743 handle_fallback_primitive_restart(struct cso_context
*cso
,
744 struct pipe_context
*pipe
,
745 const struct _mesa_index_buffer
*ib
,
746 struct pipe_index_buffer
*ibuffer
,
747 struct pipe_draw_info
*orig_info
)
749 const unsigned start
= orig_info
->start
;
750 const unsigned count
= orig_info
->count
;
751 struct pipe_draw_info info
= *orig_info
;
752 struct pipe_transfer
*transfer
= NULL
;
753 unsigned instance
, i
;
754 const void *ptr
= NULL
;
755 struct sub_primitive
*sub_prims
;
756 unsigned num_sub_prims
;
758 assert(info
.indexed
);
759 assert(ibuffer
->buffer
|| ibuffer
->user_buffer
);
762 if (!ibuffer
->buffer
|| !ibuffer
->user_buffer
|| !ib
)
765 info
.primitive_restart
= FALSE
;
766 info
.instance_count
= 1;
768 if (_mesa_is_bufferobj(ib
->obj
)) {
769 ptr
= pipe_buffer_map_range(pipe
, ibuffer
->buffer
,
770 start
* ibuffer
->index_size
, /* start */
771 count
* ibuffer
->index_size
, /* length */
772 PIPE_TRANSFER_READ
, &transfer
);
776 ptr
= (uint8_t*)ptr
+ (ibuffer
->offset
- start
* ibuffer
->index_size
);
784 sub_prims
= find_sub_primitives(ptr
, ibuffer
->index_size
,
785 0, count
, orig_info
->restart_index
,
789 pipe_buffer_unmap(pipe
, transfer
);
791 /* Now draw the sub primitives.
792 * Need to loop over instances as well to preserve draw order.
794 for (instance
= 0; instance
< orig_info
->instance_count
; instance
++) {
795 info
.start_instance
= instance
+ orig_info
->start_instance
;
796 for (i
= 0; i
< num_sub_prims
; i
++) {
797 info
.start
= sub_prims
[i
].start
;
798 info
.count
= sub_prims
[i
].count
;
799 if (u_trim_pipe_prim(info
.mode
, &info
.count
)) {
800 cso_draw_vbo(cso
, &info
);
811 * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
812 * the corresponding Gallium type.
815 translate_prim(const struct gl_context
*ctx
, unsigned prim
)
817 /* GL prims should match Gallium prims, spot-check a few */
818 assert(GL_POINTS
== PIPE_PRIM_POINTS
);
819 assert(GL_QUADS
== PIPE_PRIM_QUADS
);
820 assert(GL_TRIANGLE_STRIP_ADJACENCY
== PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY
);
822 /* Avoid quadstrips if it's easy to do so:
823 * Note: it's important to do the correct trimming if we change the
824 * prim type! We do that wherever this function is called.
826 if (prim
== GL_QUAD_STRIP
&&
827 ctx
->Light
.ShadeModel
!= GL_FLAT
&&
828 ctx
->Polygon
.FrontMode
== GL_FILL
&&
829 ctx
->Polygon
.BackMode
== GL_FILL
)
830 prim
= GL_TRIANGLE_STRIP
;
837 * Setup vertex arrays and buffers prior to drawing.
838 * \return GL_TRUE for success, GL_FALSE otherwise (probably out of memory)
841 st_validate_varrays(struct gl_context
*ctx
,
842 const struct gl_client_array
**arrays
)
844 struct st_context
*st
= st_context(ctx
);
845 const struct st_vertex_program
*vp
;
846 const struct st_vp_variant
*vpv
;
847 struct pipe_vertex_buffer vbuffer
[PIPE_MAX_SHADER_INPUTS
];
848 struct pipe_vertex_element velements
[PIPE_MAX_ATTRIBS
];
849 unsigned num_vbuffers
, num_velements
;
851 /* must get these after state validation! */
853 vpv
= st
->vp_variant
;
855 memset(velements
, 0, sizeof(struct pipe_vertex_element
) * vpv
->num_inputs
);
858 * Setup the vbuffer[] and velements[] arrays.
860 if (is_interleaved_arrays(vp
, vpv
, arrays
)) {
861 if (!setup_interleaved_attribs(ctx
, vp
, vpv
, arrays
, vbuffer
,
867 num_velements
= vpv
->num_inputs
;
868 if (num_velements
== 0)
872 if (!setup_non_interleaved_attribs(ctx
, vp
, vpv
, arrays
,
873 vbuffer
, velements
)) {
877 num_vbuffers
= vpv
->num_inputs
;
878 num_velements
= vpv
->num_inputs
;
881 cso_set_vertex_buffers(st
->cso_context
, num_vbuffers
, vbuffer
);
882 cso_set_vertex_elements(st
->cso_context
, num_velements
, velements
);
889 * This function gets plugged into the VBO module and is called when
890 * we have something to render.
891 * Basically, translate the information into the format expected by gallium.
894 st_draw_vbo(struct gl_context
*ctx
,
895 const struct _mesa_prim
*prims
,
897 const struct _mesa_index_buffer
*ib
,
898 GLboolean index_bounds_valid
,
901 struct gl_transform_feedback_object
*tfb_vertcount
)
903 struct st_context
*st
= st_context(ctx
);
904 struct pipe_context
*pipe
= st
->pipe
;
905 struct pipe_index_buffer ibuffer
= {0};
906 struct pipe_draw_info info
;
907 const struct gl_client_array
**arrays
= ctx
->Array
._DrawArrays
;
911 /* Mesa core state should have been validated already */
912 assert(ctx
->NewState
== 0x0);
914 /* Get Mesa driver state. */
915 st
->dirty
.st
|= ctx
->NewDriverState
;
916 ctx
->NewDriverState
= 0;
919 (st
->dirty
.st
& (ST_NEW_VERTEX_ARRAYS
| ST_NEW_VERTEX_PROGRAM
)) ||
920 (st
->dirty
.mesa
& (_NEW_PROGRAM
| _NEW_BUFFER_OBJECT
)) != 0;
922 /* Validate state. */
924 GLboolean vertDataEdgeFlags
;
926 vertDataEdgeFlags
= arrays
[VERT_ATTRIB_EDGEFLAG
]->BufferObj
&&
927 arrays
[VERT_ATTRIB_EDGEFLAG
]->BufferObj
->Name
;
928 if (vertDataEdgeFlags
!= st
->vertdata_edgeflags
) {
929 st
->vertdata_edgeflags
= vertDataEdgeFlags
;
930 st
->dirty
.st
|= ST_NEW_EDGEFLAGS_DATA
;
933 st_validate_state(st
);
936 if (!st_validate_varrays(ctx
, arrays
)) {
937 /* probably out of memory, no-op the draw call */
943 if (MESA_VERBOSE
& VERBOSE_GLSL
) {
947 (void) check_uniforms
;
951 util_draw_init_info(&info
);
953 /* Get index bounds for user buffers. */
954 if (!index_bounds_valid
)
955 if (!all_varyings_in_vbos(arrays
))
956 vbo_get_minmax_indices(ctx
, prims
, ib
, &min_index
, &max_index
,
959 setup_index_buffer(st
, ib
, &ibuffer
);
962 if (min_index
!= ~0 && max_index
!= ~0) {
963 info
.min_index
= min_index
;
964 info
.max_index
= max_index
;
967 /* The VBO module handles restart for the non-indexed GLDrawArrays
968 * so we only set these fields for indexed drawing:
970 info
.primitive_restart
= ctx
->Array
.PrimitiveRestart
;
971 info
.restart_index
= ctx
->Array
.RestartIndex
;
974 /* Transform feedback drawing is always non-indexed. */
975 /* Set info.count_from_stream_output. */
977 st_transform_feedback_draw_init(tfb_vertcount
, &info
);
981 /* do actual drawing */
982 for (i
= 0; i
< nr_prims
; i
++) {
983 info
.mode
= translate_prim( ctx
, prims
[i
].mode
);
984 info
.start
= prims
[i
].start
;
985 info
.count
= prims
[i
].count
;
986 info
.instance_count
= prims
[i
].num_instances
;
987 info
.index_bias
= prims
[i
].basevertex
;
989 info
.min_index
= info
.start
;
990 info
.max_index
= info
.start
+ info
.count
- 1;
993 if (info
.count_from_stream_output
) {
994 cso_draw_vbo(st
->cso_context
, &info
);
996 else if (info
.primitive_restart
) {
997 if (st
->sw_primitive_restart
) {
998 /* Handle primitive restart for drivers that doesn't support it */
999 handle_fallback_primitive_restart(st
->cso_context
, pipe
, ib
,
1003 /* don't trim, restarts might be inside index list */
1004 cso_draw_vbo(st
->cso_context
, &info
);
1007 else if (u_trim_pipe_prim(info
.mode
, &info
.count
))
1008 cso_draw_vbo(st
->cso_context
, &info
);
1011 if (ib
&& st
->indexbuf_uploader
&& !_mesa_is_bufferobj(ib
->obj
)) {
1012 pipe_resource_reference(&ibuffer
.buffer
, NULL
);
1018 st_init_draw(struct st_context
*st
)
1020 struct gl_context
*ctx
= st
->ctx
;
1022 vbo_set_draw_func(ctx
, st_draw_vbo
);
1024 #if FEATURE_feedback || FEATURE_rastpos
1025 st
->draw
= draw_create(st
->pipe
); /* for selection/feedback */
1027 /* Disable draw options that might convert points/lines to tris, etc.
1028 * as that would foul-up feedback/selection mode.
1030 draw_wide_line_threshold(st
->draw
, 1000.0f
);
1031 draw_wide_point_threshold(st
->draw
, 1000.0f
);
1032 draw_enable_line_stipple(st
->draw
, FALSE
);
1033 draw_enable_point_sprites(st
->draw
, FALSE
);
1039 st_destroy_draw(struct st_context
*st
)
1041 #if FEATURE_feedback || FEATURE_rastpos
1042 draw_destroy(st
->draw
);