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"
48 #include "program/prog_uniform.h"
52 #include "st_context.h"
54 #include "st_cb_bufferobjects.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 "draw/draw_context.h"
65 #include "cso_cache/cso_context.h"
68 static GLuint double_types
[4] = {
69 PIPE_FORMAT_R64_FLOAT
,
70 PIPE_FORMAT_R64G64_FLOAT
,
71 PIPE_FORMAT_R64G64B64_FLOAT
,
72 PIPE_FORMAT_R64G64B64A64_FLOAT
75 static GLuint float_types
[4] = {
76 PIPE_FORMAT_R32_FLOAT
,
77 PIPE_FORMAT_R32G32_FLOAT
,
78 PIPE_FORMAT_R32G32B32_FLOAT
,
79 PIPE_FORMAT_R32G32B32A32_FLOAT
82 static GLuint half_float_types
[4] = {
83 PIPE_FORMAT_R16_FLOAT
,
84 PIPE_FORMAT_R16G16_FLOAT
,
85 PIPE_FORMAT_R16G16B16_FLOAT
,
86 PIPE_FORMAT_R16G16B16A16_FLOAT
89 static GLuint uint_types_norm
[4] = {
90 PIPE_FORMAT_R32_UNORM
,
91 PIPE_FORMAT_R32G32_UNORM
,
92 PIPE_FORMAT_R32G32B32_UNORM
,
93 PIPE_FORMAT_R32G32B32A32_UNORM
96 static GLuint uint_types_scale
[4] = {
97 PIPE_FORMAT_R32_USCALED
,
98 PIPE_FORMAT_R32G32_USCALED
,
99 PIPE_FORMAT_R32G32B32_USCALED
,
100 PIPE_FORMAT_R32G32B32A32_USCALED
103 static GLuint int_types_norm
[4] = {
104 PIPE_FORMAT_R32_SNORM
,
105 PIPE_FORMAT_R32G32_SNORM
,
106 PIPE_FORMAT_R32G32B32_SNORM
,
107 PIPE_FORMAT_R32G32B32A32_SNORM
110 static GLuint int_types_scale
[4] = {
111 PIPE_FORMAT_R32_SSCALED
,
112 PIPE_FORMAT_R32G32_SSCALED
,
113 PIPE_FORMAT_R32G32B32_SSCALED
,
114 PIPE_FORMAT_R32G32B32A32_SSCALED
117 static GLuint ushort_types_norm
[4] = {
118 PIPE_FORMAT_R16_UNORM
,
119 PIPE_FORMAT_R16G16_UNORM
,
120 PIPE_FORMAT_R16G16B16_UNORM
,
121 PIPE_FORMAT_R16G16B16A16_UNORM
124 static GLuint ushort_types_scale
[4] = {
125 PIPE_FORMAT_R16_USCALED
,
126 PIPE_FORMAT_R16G16_USCALED
,
127 PIPE_FORMAT_R16G16B16_USCALED
,
128 PIPE_FORMAT_R16G16B16A16_USCALED
131 static GLuint short_types_norm
[4] = {
132 PIPE_FORMAT_R16_SNORM
,
133 PIPE_FORMAT_R16G16_SNORM
,
134 PIPE_FORMAT_R16G16B16_SNORM
,
135 PIPE_FORMAT_R16G16B16A16_SNORM
138 static GLuint short_types_scale
[4] = {
139 PIPE_FORMAT_R16_SSCALED
,
140 PIPE_FORMAT_R16G16_SSCALED
,
141 PIPE_FORMAT_R16G16B16_SSCALED
,
142 PIPE_FORMAT_R16G16B16A16_SSCALED
145 static GLuint ubyte_types_norm
[4] = {
146 PIPE_FORMAT_R8_UNORM
,
147 PIPE_FORMAT_R8G8_UNORM
,
148 PIPE_FORMAT_R8G8B8_UNORM
,
149 PIPE_FORMAT_R8G8B8A8_UNORM
152 static GLuint ubyte_types_scale
[4] = {
153 PIPE_FORMAT_R8_USCALED
,
154 PIPE_FORMAT_R8G8_USCALED
,
155 PIPE_FORMAT_R8G8B8_USCALED
,
156 PIPE_FORMAT_R8G8B8A8_USCALED
159 static GLuint byte_types_norm
[4] = {
160 PIPE_FORMAT_R8_SNORM
,
161 PIPE_FORMAT_R8G8_SNORM
,
162 PIPE_FORMAT_R8G8B8_SNORM
,
163 PIPE_FORMAT_R8G8B8A8_SNORM
166 static GLuint byte_types_scale
[4] = {
167 PIPE_FORMAT_R8_SSCALED
,
168 PIPE_FORMAT_R8G8_SSCALED
,
169 PIPE_FORMAT_R8G8B8_SSCALED
,
170 PIPE_FORMAT_R8G8B8A8_SSCALED
173 static GLuint fixed_types
[4] = {
174 PIPE_FORMAT_R32_FIXED
,
175 PIPE_FORMAT_R32G32_FIXED
,
176 PIPE_FORMAT_R32G32B32_FIXED
,
177 PIPE_FORMAT_R32G32B32A32_FIXED
183 * Return a PIPE_FORMAT_x for the given GL datatype and size.
186 st_pipe_vertex_format(GLenum type
, GLuint size
, GLenum format
,
187 GLboolean normalized
)
189 assert((type
>= GL_BYTE
&& type
<= GL_DOUBLE
) ||
190 type
== GL_FIXED
|| type
== GL_HALF_FLOAT
||
191 type
== GL_INT_2_10_10_10_REV
||
192 type
== GL_UNSIGNED_INT_2_10_10_10_REV
);
195 assert(format
== GL_RGBA
|| format
== GL_BGRA
);
197 if (type
== GL_INT_2_10_10_10_REV
||
198 type
== GL_UNSIGNED_INT_2_10_10_10_REV
) {
201 if (format
== GL_BGRA
) {
202 if (type
== GL_INT_2_10_10_10_REV
) {
204 return PIPE_FORMAT_B10G10R10A2_SNORM
;
206 return PIPE_FORMAT_B10G10R10A2_SSCALED
;
209 return PIPE_FORMAT_B10G10R10A2_UNORM
;
211 return PIPE_FORMAT_B10G10R10A2_USCALED
;
214 if (type
== GL_INT_2_10_10_10_REV
) {
216 return PIPE_FORMAT_R10G10B10A2_SNORM
;
218 return PIPE_FORMAT_R10G10B10A2_SSCALED
;
221 return PIPE_FORMAT_R10G10B10A2_UNORM
;
223 return PIPE_FORMAT_R10G10B10A2_USCALED
;
228 if (format
== GL_BGRA
) {
229 /* this is an odd-ball case */
230 assert(type
== GL_UNSIGNED_BYTE
);
232 return PIPE_FORMAT_B8G8R8A8_UNORM
;
237 case GL_DOUBLE
: return double_types
[size
-1];
238 case GL_FLOAT
: return float_types
[size
-1];
239 case GL_HALF_FLOAT
: return half_float_types
[size
-1];
240 case GL_INT
: return int_types_norm
[size
-1];
241 case GL_SHORT
: return short_types_norm
[size
-1];
242 case GL_BYTE
: return byte_types_norm
[size
-1];
243 case GL_UNSIGNED_INT
: return uint_types_norm
[size
-1];
244 case GL_UNSIGNED_SHORT
: return ushort_types_norm
[size
-1];
245 case GL_UNSIGNED_BYTE
: return ubyte_types_norm
[size
-1];
246 case GL_FIXED
: return fixed_types
[size
-1];
247 default: assert(0); return 0;
252 case GL_DOUBLE
: return double_types
[size
-1];
253 case GL_FLOAT
: return float_types
[size
-1];
254 case GL_HALF_FLOAT
: return half_float_types
[size
-1];
255 case GL_INT
: return int_types_scale
[size
-1];
256 case GL_SHORT
: return short_types_scale
[size
-1];
257 case GL_BYTE
: return byte_types_scale
[size
-1];
258 case GL_UNSIGNED_INT
: return uint_types_scale
[size
-1];
259 case GL_UNSIGNED_SHORT
: return ushort_types_scale
[size
-1];
260 case GL_UNSIGNED_BYTE
: return ubyte_types_scale
[size
-1];
261 case GL_FIXED
: return fixed_types
[size
-1];
262 default: assert(0); return 0;
265 return PIPE_FORMAT_NONE
; /* silence compiler warning */
270 * This is very similar to vbo_all_varyings_in_vbos() but we are
271 * only interested in per-vertex data. See bug 38626.
274 all_varyings_in_vbos(const struct gl_client_array
*arrays
[])
278 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++)
279 if (arrays
[i
]->StrideB
&&
280 !arrays
[i
]->InstanceDivisor
&&
281 !_mesa_is_bufferobj(arrays
[i
]->BufferObj
))
289 * Examine the active arrays to determine if we have interleaved
290 * vertex arrays all living in one VBO, or all living in user space.
293 is_interleaved_arrays(const struct st_vertex_program
*vp
,
294 const struct st_vp_variant
*vpv
,
295 const struct gl_client_array
**arrays
)
298 const struct gl_buffer_object
*firstBufObj
= NULL
;
299 GLint firstStride
= -1;
300 const GLubyte
*firstPtr
= NULL
;
301 GLboolean userSpaceBuffer
= GL_FALSE
;
303 for (attr
= 0; attr
< vpv
->num_inputs
; attr
++) {
304 const GLuint mesaAttr
= vp
->index_to_input
[attr
];
305 const struct gl_client_array
*array
= arrays
[mesaAttr
];
306 const struct gl_buffer_object
*bufObj
= array
->BufferObj
;
307 const GLsizei stride
= array
->StrideB
; /* in bytes */
310 /* save info about the first array */
311 firstStride
= stride
;
312 firstPtr
= array
->Ptr
;
313 firstBufObj
= bufObj
;
314 userSpaceBuffer
= !bufObj
|| !bufObj
->Name
;
317 /* check if other arrays interleave with the first, in same buffer */
318 if (stride
!= firstStride
)
319 return GL_FALSE
; /* strides don't match */
321 if (bufObj
!= firstBufObj
)
322 return GL_FALSE
; /* arrays in different VBOs */
324 if (abs(array
->Ptr
- firstPtr
) > firstStride
)
325 return GL_FALSE
; /* arrays start too far apart */
327 if ((!bufObj
|| !_mesa_is_bufferobj(bufObj
)) != userSpaceBuffer
)
328 return GL_FALSE
; /* mix of VBO and user-space arrays */
337 * Set up for drawing interleaved arrays that all live in one VBO
338 * or all live in user space.
339 * \param vbuffer returns vertex buffer info
340 * \param velements returns vertex element info
343 setup_interleaved_attribs(struct gl_context
*ctx
,
344 const struct st_vertex_program
*vp
,
345 const struct st_vp_variant
*vpv
,
346 const struct gl_client_array
**arrays
,
347 struct pipe_vertex_buffer
*vbuffer
,
348 struct pipe_vertex_element velements
[],
350 unsigned num_instances
)
352 struct st_context
*st
= st_context(ctx
);
353 struct pipe_context
*pipe
= st
->pipe
;
355 const GLubyte
*low_addr
= NULL
;
357 /* Find the lowest address of the arrays we're drawing */
358 if (vpv
->num_inputs
) {
359 low_addr
= arrays
[vp
->index_to_input
[0]]->Ptr
;
361 for (attr
= 1; attr
< vpv
->num_inputs
; attr
++) {
362 const GLubyte
*start
= arrays
[vp
->index_to_input
[attr
]]->Ptr
;
363 low_addr
= MIN2(low_addr
, start
);
367 for (attr
= 0; attr
< vpv
->num_inputs
; attr
++) {
368 const GLuint mesaAttr
= vp
->index_to_input
[attr
];
369 const struct gl_client_array
*array
= arrays
[mesaAttr
];
370 struct gl_buffer_object
*bufobj
= array
->BufferObj
;
371 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
372 unsigned src_offset
= (unsigned) (array
->Ptr
- low_addr
);
373 GLuint element_size
= array
->_ElementSize
;
374 GLsizei stride
= array
->StrideB
;
376 assert(element_size
== array
->Size
* _mesa_sizeof_type(array
->Type
));
379 if (bufobj
&& _mesa_is_bufferobj(bufobj
)) {
380 vbuffer
->buffer
= NULL
;
381 pipe_resource_reference(&vbuffer
->buffer
, stobj
->buffer
);
382 vbuffer
->buffer_offset
= pointer_to_offset(low_addr
);
385 uint divisor
= array
->InstanceDivisor
;
386 uint last_index
= divisor
? num_instances
/ divisor
: max_index
;
387 uint bytes
= src_offset
+ stride
* last_index
+ element_size
;
389 vbuffer
->buffer
= pipe_user_buffer_create(pipe
->screen
,
392 PIPE_BIND_VERTEX_BUFFER
);
393 vbuffer
->buffer_offset
= 0;
395 /* Track user vertex buffers. */
396 pipe_resource_reference(&st
->user_attrib
[0].buffer
, vbuffer
->buffer
);
397 st
->user_attrib
[0].element_size
= element_size
;
398 st
->user_attrib
[0].stride
= stride
;
399 st
->num_user_attribs
= 1;
401 vbuffer
->stride
= stride
; /* in bytes */
404 velements
[attr
].src_offset
= src_offset
;
405 velements
[attr
].instance_divisor
= array
->InstanceDivisor
;
406 velements
[attr
].vertex_buffer_index
= 0;
407 velements
[attr
].src_format
= st_pipe_vertex_format(array
->Type
,
411 assert(velements
[attr
].src_format
);
417 * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each
419 * \param vbuffer returns vertex buffer info
420 * \param velements returns vertex element info
423 setup_non_interleaved_attribs(struct gl_context
*ctx
,
424 const struct st_vertex_program
*vp
,
425 const struct st_vp_variant
*vpv
,
426 const struct gl_client_array
**arrays
,
427 struct pipe_vertex_buffer vbuffer
[],
428 struct pipe_vertex_element velements
[],
430 unsigned num_instances
)
432 struct st_context
*st
= st_context(ctx
);
433 struct pipe_context
*pipe
= st
->pipe
;
436 for (attr
= 0; attr
< vpv
->num_inputs
; attr
++) {
437 const GLuint mesaAttr
= vp
->index_to_input
[attr
];
438 const struct gl_client_array
*array
= arrays
[mesaAttr
];
439 struct gl_buffer_object
*bufobj
= array
->BufferObj
;
440 GLuint element_size
= array
->_ElementSize
;
441 GLsizei stride
= array
->StrideB
;
443 assert(element_size
== array
->Size
* _mesa_sizeof_type(array
->Type
));
445 if (bufobj
&& _mesa_is_bufferobj(bufobj
)) {
446 /* Attribute data is in a VBO.
447 * Recall that for VBOs, the gl_client_array->Ptr field is
448 * really an offset from the start of the VBO, not a pointer.
450 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
451 assert(stobj
->buffer
);
453 vbuffer
[attr
].buffer
= NULL
;
454 pipe_resource_reference(&vbuffer
[attr
].buffer
, stobj
->buffer
);
455 vbuffer
[attr
].buffer_offset
= pointer_to_offset(array
->Ptr
);
463 uint divisor
= array
->InstanceDivisor
;
464 uint last_index
= divisor
? num_instances
/ divisor
: max_index
;
466 bytes
= stride
* last_index
+ element_size
;
468 ptr
= (void *) array
->Ptr
;
471 /* no array, use ctx->Current.Attrib[] value */
472 bytes
= element_size
= sizeof(ctx
->Current
.Attrib
[0]);
473 ptr
= (void *) ctx
->Current
.Attrib
[mesaAttr
];
480 vbuffer
[attr
].buffer
=
481 pipe_user_buffer_create(pipe
->screen
, ptr
, bytes
,
482 PIPE_BIND_VERTEX_BUFFER
);
484 vbuffer
[attr
].buffer_offset
= 0;
486 /* Track user vertex buffers. */
487 pipe_resource_reference(&st
->user_attrib
[attr
].buffer
, vbuffer
[attr
].buffer
);
488 st
->user_attrib
[attr
].element_size
= element_size
;
489 st
->user_attrib
[attr
].stride
= stride
;
490 st
->num_user_attribs
= MAX2(st
->num_user_attribs
, attr
+ 1);
493 /* common-case setup */
494 vbuffer
[attr
].stride
= stride
; /* in bytes */
496 velements
[attr
].src_offset
= 0;
497 velements
[attr
].instance_divisor
= array
->InstanceDivisor
;
498 velements
[attr
].vertex_buffer_index
= attr
;
499 velements
[attr
].src_format
= st_pipe_vertex_format(array
->Type
,
503 assert(velements
[attr
].src_format
);
509 setup_index_buffer(struct gl_context
*ctx
,
510 const struct _mesa_index_buffer
*ib
,
511 struct pipe_index_buffer
*ibuffer
)
513 struct st_context
*st
= st_context(ctx
);
514 struct pipe_context
*pipe
= st
->pipe
;
516 memset(ibuffer
, 0, sizeof(*ibuffer
));
518 struct gl_buffer_object
*bufobj
= ib
->obj
;
521 case GL_UNSIGNED_INT
:
522 ibuffer
->index_size
= 4;
524 case GL_UNSIGNED_SHORT
:
525 ibuffer
->index_size
= 2;
527 case GL_UNSIGNED_BYTE
:
528 ibuffer
->index_size
= 1;
535 /* get/create the index buffer object */
536 if (bufobj
&& _mesa_is_bufferobj(bufobj
)) {
537 /* elements/indexes are in a real VBO */
538 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
539 pipe_resource_reference(&ibuffer
->buffer
, stobj
->buffer
);
540 ibuffer
->offset
= pointer_to_offset(ib
->ptr
);
543 /* element/indicies are in user space memory */
545 pipe_user_buffer_create(pipe
->screen
, (void *) ib
->ptr
,
546 ib
->count
* ibuffer
->index_size
,
547 PIPE_BIND_INDEX_BUFFER
);
554 * Prior to drawing, check that any uniforms referenced by the
555 * current shader have been set. If a uniform has not been set,
559 check_uniforms(struct gl_context
*ctx
)
561 struct gl_shader_program
*shProg
[3] = {
562 ctx
->Shader
.CurrentVertexProgram
,
563 ctx
->Shader
.CurrentGeometryProgram
,
564 ctx
->Shader
.CurrentFragmentProgram
,
568 for (j
= 0; j
< 3; j
++) {
571 if (shProg
[j
] == NULL
|| !shProg
[j
]->LinkStatus
)
574 for (i
= 0; i
< shProg
[j
]->Uniforms
->NumUniforms
; i
++) {
575 const struct gl_uniform
*u
= &shProg
[j
]->Uniforms
->Uniforms
[i
];
576 if (!u
->Initialized
) {
578 "Using shader with uninitialized uniform: %s",
585 /** Helper code for primitive restart fallback */
586 #define DO_DRAW(pipe, cur_start, cur_count) \
588 info.start = cur_start; \
589 info.count = cur_count; \
590 if (u_trim_pipe_prim(info.mode, &info.count)) { \
592 pipe_buffer_unmap(pipe, transfer); \
593 pipe->draw_vbo(pipe, &info); \
595 ptr = pipe_buffer_map(pipe, ibuffer->buffer, PIPE_TRANSFER_READ, &transfer); \
596 assert(ptr != NULL); \
597 ptr = ADD_POINTERS(ptr, ibuffer->offset); \
602 /** More helper code for primitive restart fallback */
603 #define PRIM_RESTART_LOOP(elements) \
605 for (i = start; i < end; i++) { \
606 if (elements[i] == info.restart_index) { \
607 if (cur_count > 0) { \
608 /* draw elts up to prev pos */ \
609 DO_DRAW(pipe, cur_start, cur_count); \
611 /* begin new prim at next elt */ \
619 if (cur_count > 0) { \
620 DO_DRAW(pipe, cur_start, cur_count); \
625 handle_fallback_primitive_restart(struct pipe_context
*pipe
,
626 const struct _mesa_index_buffer
*ib
,
627 struct pipe_index_buffer
*ibuffer
,
628 struct pipe_draw_info
*orig_info
)
630 const unsigned start
= orig_info
->start
;
631 const unsigned count
= orig_info
->count
;
632 const unsigned end
= start
+ count
;
633 struct pipe_draw_info info
= *orig_info
;
634 struct pipe_transfer
*transfer
= NULL
;
635 unsigned instance
, i
, cur_start
, cur_count
;
638 info
.primitive_restart
= FALSE
;
641 /* Splitting the draw arrays call is handled by the VBO module */
642 if (u_trim_pipe_prim(info
.mode
, &info
.count
))
643 pipe
->draw_vbo(pipe
, &info
);
648 /* info.indexed == TRUE */
650 assert(ibuffer
->buffer
);
653 struct gl_buffer_object
*bufobj
= ib
->obj
;
654 if (bufobj
&& bufobj
->Name
) {
663 ptr
= pipe_buffer_map(pipe
, ibuffer
->buffer
, PIPE_TRANSFER_READ
, &transfer
);
667 ptr
= ADD_POINTERS(ptr
, ibuffer
->offset
);
669 /* Need to loop over instances as well to preserve draw order */
670 for (instance
= 0; instance
< orig_info
->instance_count
; instance
++) {
671 info
.start_instance
= instance
+ orig_info
->start_instance
;
672 info
.instance_count
= 1;
676 switch (ibuffer
->index_size
) {
679 const ubyte
*elt_ub
= (const ubyte
*)ptr
;
680 PRIM_RESTART_LOOP(elt_ub
);
685 const ushort
*elt_us
= (const ushort
*)ptr
;
686 PRIM_RESTART_LOOP(elt_us
);
691 const uint
*elt_ui
= (const uint
*)ptr
;
692 PRIM_RESTART_LOOP(elt_ui
);
696 assert(0 && "bad index_size in handle_fallback_primitive_restart()");
701 pipe_buffer_unmap(pipe
, transfer
);
706 * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
707 * the corresponding Gallium type.
710 translate_prim(const struct gl_context
*ctx
, unsigned prim
)
712 /* GL prims should match Gallium prims, spot-check a few */
713 assert(GL_POINTS
== PIPE_PRIM_POINTS
);
714 assert(GL_QUADS
== PIPE_PRIM_QUADS
);
715 assert(GL_TRIANGLE_STRIP_ADJACENCY
== PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY
);
717 /* Avoid quadstrips if it's easy to do so:
718 * Note: it's important to do the correct trimming if we change the
719 * prim type! We do that wherever this function is called.
721 if (prim
== GL_QUAD_STRIP
&&
722 ctx
->Light
.ShadeModel
!= GL_FLAT
&&
723 ctx
->Polygon
.FrontMode
== GL_FILL
&&
724 ctx
->Polygon
.BackMode
== GL_FILL
)
725 prim
= GL_TRIANGLE_STRIP
;
732 st_validate_varrays(struct gl_context
*ctx
,
733 const struct gl_client_array
**arrays
,
735 unsigned num_instances
)
737 struct st_context
*st
= st_context(ctx
);
738 const struct st_vertex_program
*vp
;
739 const struct st_vp_variant
*vpv
;
740 struct pipe_vertex_buffer vbuffer
[PIPE_MAX_SHADER_INPUTS
];
741 struct pipe_vertex_element velements
[PIPE_MAX_ATTRIBS
];
742 unsigned num_vbuffers
, num_velements
;
746 /* must get these after state validation! */
748 vpv
= st
->vp_variant
;
750 memset(velements
, 0, sizeof(struct pipe_vertex_element
) * vpv
->num_inputs
);
752 /* Unreference any user vertex buffers. */
753 for (i
= 0; i
< st
->num_user_attribs
; i
++) {
754 pipe_resource_reference(&st
->user_attrib
[i
].buffer
, NULL
);
756 st
->num_user_attribs
= 0;
759 * Setup the vbuffer[] and velements[] arrays.
761 if (is_interleaved_arrays(vp
, vpv
, arrays
)) {
762 setup_interleaved_attribs(ctx
, vp
, vpv
, arrays
, vbuffer
, velements
,
763 max_index
, num_instances
);
766 num_velements
= vpv
->num_inputs
;
767 if (num_velements
== 0)
771 setup_non_interleaved_attribs(ctx
, vp
, vpv
, arrays
,
772 vbuffer
, velements
, max_index
,
774 num_vbuffers
= vpv
->num_inputs
;
775 num_velements
= vpv
->num_inputs
;
778 cso_set_vertex_buffers(st
->cso_context
, num_vbuffers
, vbuffer
);
779 cso_set_vertex_elements(st
->cso_context
, num_velements
, velements
);
781 /* unreference buffers (frees wrapped user-space buffer objects)
782 * This is OK, because the pipe driver should reference buffers by itself
783 * in set_vertex_buffers. */
784 for (attr
= 0; attr
< num_vbuffers
; attr
++) {
785 pipe_resource_reference(&vbuffer
[attr
].buffer
, NULL
);
786 assert(!vbuffer
[attr
].buffer
);
792 * This function gets plugged into the VBO module and is called when
793 * we have something to render.
794 * Basically, translate the information into the format expected by gallium.
797 st_draw_vbo(struct gl_context
*ctx
,
798 const struct gl_client_array
**arrays
,
799 const struct _mesa_prim
*prims
,
801 const struct _mesa_index_buffer
*ib
,
802 GLboolean index_bounds_valid
,
806 struct st_context
*st
= st_context(ctx
);
807 struct pipe_context
*pipe
= st
->pipe
;
808 struct pipe_index_buffer ibuffer
;
809 struct pipe_draw_info info
;
810 unsigned i
, num_instances
= 1;
811 GLboolean new_array
=
813 (st
->dirty
.mesa
& (_NEW_ARRAY
| _NEW_PROGRAM
| _NEW_BUFFER_OBJECT
)) != 0;
815 /* Mesa core state should have been validated already */
816 assert(ctx
->NewState
== 0x0);
819 /* Gallium probably doesn't want this in some cases. */
820 if (!index_bounds_valid
)
821 if (!all_varyings_in_vbos(arrays
))
822 vbo_get_minmax_index(ctx
, prims
, ib
, &min_index
, &max_index
);
824 for (i
= 0; i
< nr_prims
; i
++) {
825 num_instances
= MAX2(num_instances
, prims
[i
].num_instances
);
829 /* Get min/max index for non-indexed drawing. */
833 for (i
= 0; i
< nr_prims
; i
++) {
834 min_index
= MIN2(min_index
, prims
[i
].start
);
835 max_index
= MAX2(max_index
, prims
[i
].start
+ prims
[i
].count
- 1);
836 num_instances
= MAX2(num_instances
, prims
[i
].num_instances
);
840 /* Validate state. */
842 GLboolean vertDataEdgeFlags
;
844 /* sanity check for pointer arithmetic below */
845 assert(sizeof(arrays
[0]->Ptr
[0]) == 1);
847 vertDataEdgeFlags
= arrays
[VERT_ATTRIB_EDGEFLAG
]->BufferObj
&&
848 arrays
[VERT_ATTRIB_EDGEFLAG
]->BufferObj
->Name
;
849 if (vertDataEdgeFlags
!= st
->vertdata_edgeflags
) {
850 st
->vertdata_edgeflags
= vertDataEdgeFlags
;
851 st
->dirty
.st
|= ST_NEW_EDGEFLAGS_DATA
;
854 st_validate_state(st
);
857 st_validate_varrays(ctx
, arrays
, max_index
, num_instances
);
861 if (MESA_VERBOSE
& VERBOSE_GLSL
) {
865 (void) check_uniforms
;
869 /* Notify the driver that the content of user buffers may have been
871 assert(max_index
>= min_index
);
872 if (!new_array
&& st
->num_user_attribs
) {
873 for (i
= 0; i
< st
->num_user_attribs
; i
++) {
874 if (st
->user_attrib
[i
].buffer
) {
875 unsigned element_size
= st
->user_attrib
[i
].element_size
;
876 unsigned stride
= st
->user_attrib
[i
].stride
;
877 unsigned min_offset
= min_index
* stride
;
878 unsigned max_offset
= max_index
* stride
+ element_size
;
880 assert(max_offset
> min_offset
);
882 pipe
->redefine_user_buffer(pipe
, st
->user_attrib
[i
].buffer
,
884 max_offset
- min_offset
);
889 setup_index_buffer(ctx
, ib
, &ibuffer
);
890 pipe
->set_index_buffer(pipe
, &ibuffer
);
892 util_draw_init_info(&info
);
895 if (min_index
!= ~0 && max_index
!= ~0) {
896 info
.min_index
= min_index
;
897 info
.max_index
= max_index
;
901 info
.primitive_restart
= ctx
->Array
.PrimitiveRestart
;
902 info
.restart_index
= ctx
->Array
.RestartIndex
;
904 /* do actual drawing */
905 for (i
= 0; i
< nr_prims
; i
++) {
906 info
.mode
= translate_prim( ctx
, prims
[i
].mode
);
907 info
.start
= prims
[i
].start
;
908 info
.count
= prims
[i
].count
;
909 info
.instance_count
= prims
[i
].num_instances
;
910 info
.index_bias
= prims
[i
].basevertex
;
912 info
.min_index
= info
.start
;
913 info
.max_index
= info
.start
+ info
.count
- 1;
916 if (info
.primitive_restart
) {
918 * Handle primitive restart for drivers that doesn't support it.
920 * The VBO module handles restart inside of draw_arrays for us,
921 * but we should still remove the primitive_restart flag on the
922 * info struct, the fallback function does this for us. Just
923 * remove the flag for all drivers in this case as well.
925 if (st
->sw_primitive_restart
|| !info
.indexed
)
926 handle_fallback_primitive_restart(pipe
, ib
, &ibuffer
, &info
);
928 /* don't trim, restarts might be inside index list */
929 pipe
->draw_vbo(pipe
, &info
);
931 else if (u_trim_pipe_prim(info
.mode
, &info
.count
))
932 pipe
->draw_vbo(pipe
, &info
);
935 pipe_resource_reference(&ibuffer
.buffer
, NULL
);
940 st_init_draw(struct st_context
*st
)
942 struct gl_context
*ctx
= st
->ctx
;
944 vbo_set_draw_func(ctx
, st_draw_vbo
);
946 #if FEATURE_feedback || FEATURE_rastpos
947 st
->draw
= draw_create(st
->pipe
); /* for selection/feedback */
949 /* Disable draw options that might convert points/lines to tris, etc.
950 * as that would foul-up feedback/selection mode.
952 draw_wide_line_threshold(st
->draw
, 1000.0f
);
953 draw_wide_point_threshold(st
->draw
, 1000.0f
);
954 draw_enable_line_stipple(st
->draw
, FALSE
);
955 draw_enable_point_sprites(st
->draw
, FALSE
);
961 st_destroy_draw(struct st_context
*st
)
963 #if FEATURE_feedback || FEATURE_rastpos
964 draw_destroy(st
->draw
);