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 **************************************************************************/
30 * Keith Whitwell <keith@tungstengraphics.com>
33 #include "main/imports.h"
34 #include "main/image.h"
37 #include "vbo/vbo_context.h"
41 #include "st_context.h"
42 #include "st_cb_bufferobjects.h"
44 #include "st_program.h"
46 #include "pipe/p_context.h"
47 #include "pipe/p_defines.h"
48 #include "pipe/p_winsys.h"
50 #include "pipe/draw/draw_private.h"
51 #include "pipe/draw/draw_context.h"
55 * Return a PIPE_FORMAT_x for the given GL datatype and size.
58 pipe_vertex_format(GLenum type
, GLuint size
)
60 static const GLuint float_fmts
[4] = {
61 PIPE_FORMAT_R32_FLOAT
,
62 PIPE_FORMAT_R32G32_FLOAT
,
63 PIPE_FORMAT_R32G32B32_FLOAT
,
64 PIPE_FORMAT_R32G32B32A32_FLOAT
,
66 static const GLuint int_fmts
[4] = {
67 PIPE_FORMAT_R32_SSCALED
,
68 PIPE_FORMAT_R32G32_SSCALED
,
69 PIPE_FORMAT_R32G32B32_SSCALED
,
70 PIPE_FORMAT_R32G32B32A32_SSCALED
,
73 assert(type
>= GL_BYTE
);
74 assert(type
<= GL_DOUBLE
);
80 return float_fmts
[size
- 1];
82 return int_fmts
[size
- 1];
90 * The default attribute buffer is basically a copy of the
91 * ctx->Current.Attrib[] array. It's used when the vertex program
92 * references an attribute for which we don't have a VBO/array.
95 create_default_attribs_buffer(struct st_context
*st
)
97 struct pipe_context
*pipe
= st
->pipe
;
98 st
->default_attrib_buffer
= pipe
->winsys
->buffer_create( pipe
->winsys
, 32 );
103 destroy_default_attribs_buffer(struct st_context
*st
)
105 struct pipe_context
*pipe
= st
->pipe
;
106 pipe
->winsys
->buffer_reference(pipe
->winsys
,
107 &st
->default_attrib_buffer
, NULL
);
112 * This function gets plugged into the VBO module and is called when
113 * we have something to render.
114 * Basically, translate the information into the format expected by pipe.
117 st_draw_vbo(GLcontext
*ctx
,
118 const struct gl_client_array
**arrays
,
119 const struct _mesa_prim
*prims
,
121 const struct _mesa_index_buffer
*ib
,
125 struct pipe_context
*pipe
= ctx
->st
->pipe
;
126 struct pipe_winsys
*winsys
= pipe
->winsys
;
127 const struct st_vertex_program
*vp
;
128 const struct pipe_shader_state
*vs
;
129 struct pipe_vertex_buffer vbuffer
[PIPE_MAX_SHADER_INPUTS
];
132 /* sanity check for pointer arithmetic below */
133 assert(sizeof(arrays
[0]->Ptr
[0]) == 1);
135 st_validate_state(ctx
->st
);
137 /* must get these after state validation! */
139 vs
= &ctx
->st
->state
.vs
->state
;
141 /* loop over TGSI shader inputs to determine vertex buffer
144 for (attr
= 0; attr
< vs
->num_inputs
; attr
++) {
145 const GLuint mesaAttr
= vp
->index_to_input
[attr
];
146 struct gl_buffer_object
*bufobj
= arrays
[mesaAttr
]->BufferObj
;
147 struct pipe_vertex_element velement
;
149 if (bufobj
&& bufobj
->Name
) {
150 /* Attribute data is in a VBO.
151 * Recall that for VBOs, the gl_client_array->Ptr field is
152 * really an offset from the start of the VBO, not a pointer.
154 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
155 assert(stobj
->buffer
);
157 vbuffer
[attr
].buffer
= NULL
;
158 winsys
->buffer_reference(winsys
, &vbuffer
[attr
].buffer
, stobj
->buffer
);
159 vbuffer
[attr
].buffer_offset
= (unsigned) arrays
[0]->Ptr
;/* in bytes */
160 velement
.src_offset
= arrays
[mesaAttr
]->Ptr
- arrays
[0]->Ptr
;
161 assert(velement
.src_offset
<= 2048); /* 11-bit field */
164 /* attribute data is in user-space memory, not a VBO */
165 uint bytes
= (arrays
[mesaAttr
]->Size
166 * _mesa_sizeof_type(arrays
[mesaAttr
]->Type
)
171 = winsys
->user_buffer_create(winsys
,
172 (void *) arrays
[mesaAttr
]->Ptr
,
174 vbuffer
[attr
].buffer_offset
= 0;
175 velement
.src_offset
= 0;
178 /* common-case setup */
179 vbuffer
[attr
].pitch
= arrays
[mesaAttr
]->StrideB
; /* in bytes */
180 vbuffer
[attr
].max_index
= 0; /* need this? */
181 velement
.vertex_buffer_index
= attr
;
182 velement
.dst_offset
= 0; /* need this? */
183 velement
.src_format
= pipe_vertex_format(arrays
[mesaAttr
]->Type
,
184 arrays
[mesaAttr
]->Size
);
185 assert(velement
.src_format
);
187 /* tell pipe about this attribute */
188 pipe
->set_vertex_buffer(pipe
, attr
, &vbuffer
[attr
]);
189 pipe
->set_vertex_element(pipe
, attr
, &velement
);
193 /* do actual drawing */
195 /* indexed primitive */
196 struct gl_buffer_object
*bufobj
= ib
->obj
;
197 struct pipe_buffer_handle
*indexBuf
= NULL
;
198 unsigned indexSize
, indexOffset
, i
;
201 case GL_UNSIGNED_INT
:
204 case GL_UNSIGNED_SHORT
:
207 case GL_UNSIGNED_BYTE
:
214 /* get/create the index buffer object */
215 if (bufobj
&& bufobj
->Name
) {
216 /* elements/indexes are in a real VBO */
217 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
218 winsys
->buffer_reference(winsys
, &indexBuf
, stobj
->buffer
);
219 indexOffset
= (unsigned) ib
->ptr
/ indexSize
;
222 /* element/indicies are in user space memory */
223 indexBuf
= winsys
->user_buffer_create(winsys
,
225 ib
->count
* indexSize
);
230 for (i
= 0; i
< nr_prims
; i
++) {
231 pipe
->draw_elements(pipe
, indexBuf
, indexSize
,
233 prims
[i
].start
+ indexOffset
, prims
[i
].count
);
236 winsys
->buffer_reference(winsys
, &indexBuf
, NULL
);
241 for (i
= 0; i
< nr_prims
; i
++) {
242 pipe
->draw_arrays(pipe
, prims
[i
].mode
, prims
[i
].start
, prims
[i
].count
);
246 /* unreference buffers (frees wrapped user-space buffer objects) */
247 for (attr
= 0; attr
< vs
->num_inputs
; attr
++) {
248 winsys
->buffer_reference(winsys
, &vbuffer
[attr
].buffer
, NULL
);
249 assert(!vbuffer
[attr
].buffer
);
250 pipe
->set_vertex_buffer(pipe
, attr
, &vbuffer
[attr
]);
257 * Utility function for drawing simple primitives (such as quads for
258 * glClear and glDrawPixels). Coordinates are in screen space.
259 * \param mode one of PIPE_PRIM_x
260 * \param numVertex number of vertices
261 * \param verts vertex data (all attributes are float[4])
262 * \param numAttribs number of attributes per vertex
265 st_draw_vertices(GLcontext
*ctx
, unsigned prim
,
266 unsigned numVertex
, float *verts
,
269 const float width
= ctx
->DrawBuffer
->Width
;
270 const float height
= ctx
->DrawBuffer
->Height
;
271 const unsigned vertex_bytes
= numVertex
* numAttribs
* 4 * sizeof(float);
272 struct pipe_context
*pipe
= ctx
->st
->pipe
;
273 struct pipe_buffer_handle
*vbuf
;
274 struct pipe_vertex_buffer vbuffer
;
275 struct pipe_vertex_element velement
;
278 assert(numAttribs
> 0);
280 /* convert to clip coords */
281 for (i
= 0; i
< numVertex
; i
++) {
282 float x
= verts
[i
* numAttribs
* 4 + 0];
283 float y
= verts
[i
* numAttribs
* 4 + 1];
284 x
= x
/ width
* 2.0 - 1.0;
285 y
= y
/ height
* 2.0 - 1.0;
286 verts
[i
* numAttribs
* 4 + 0] = x
;
287 verts
[i
* numAttribs
* 4 + 1] = y
;
290 /* XXX create one-time */
291 vbuf
= pipe
->winsys
->buffer_create(pipe
->winsys
, 32);
292 pipe
->winsys
->buffer_data(pipe
->winsys
, vbuf
,
294 PIPE_BUFFER_USAGE_VERTEX
);
296 /* tell pipe about the vertex buffer */
297 vbuffer
.buffer
= vbuf
;
298 vbuffer
.pitch
= numAttribs
* 4 * sizeof(float); /* vertex size */
299 vbuffer
.buffer_offset
= 0;
300 pipe
->set_vertex_buffer(pipe
, 0, &vbuffer
);
302 /* tell pipe about the vertex attributes */
303 for (i
= 0; i
< numAttribs
; i
++) {
304 velement
.src_offset
= i
* 4 * sizeof(GLfloat
);
305 velement
.vertex_buffer_index
= 0;
306 velement
.src_format
= PIPE_FORMAT_R32G32B32A32_FLOAT
;
307 velement
.dst_offset
= 0;
308 pipe
->set_vertex_element(pipe
, i
, &velement
);
312 pipe
->draw_arrays(pipe
, prim
, 0, numVertex
);
314 /* XXX: do one-time */
315 pipe
->winsys
->buffer_reference(pipe
->winsys
, &vbuf
, NULL
);
320 * Set the (private) draw module's post-transformed vertex format when in
321 * GL_SELECT or GL_FEEDBACK mode.
324 set_feedback_vertex_format(GLcontext
*ctx
)
326 struct st_context
*st
= ctx
->st
;
327 uint attrs
[PIPE_MAX_SHADER_OUTPUTS
];
328 enum interp_mode interp
[PIPE_MAX_SHADER_OUTPUTS
];
331 if (ctx
->RenderMode
== GL_FEEDBACK
) {
332 /* emit all attribs (pos, color, texcoord) as GLfloat[4] */
333 n
= st
->state
.vs
->state
.num_outputs
;
334 for (i
= 0; i
< n
; i
++) {
335 attrs
[i
] = FORMAT_4F
;
336 interp
[i
] = INTERP_NONE
;
340 assert(ctx
->RenderMode
== GL_SELECT
);
342 attrs
[0] = FORMAT_4F
;
343 interp
[0] = INTERP_NONE
;
346 draw_set_vertex_attributes(st
->draw
, attrs
, interp
, n
);
351 * Called by VBO to draw arrays when in selection or feedback mode.
352 * This is very much like the normal draw_vbo() function above.
353 * Look at code refactoring some day.
354 * Might move this into the failover module some day.
357 st_feedback_draw_vbo(GLcontext
*ctx
,
358 const struct gl_client_array
**arrays
,
359 const struct _mesa_prim
*prims
,
361 const struct _mesa_index_buffer
*ib
,
365 struct st_context
*st
= ctx
->st
;
366 struct pipe_context
*pipe
= st
->pipe
;
367 struct draw_context
*draw
= st
->draw
;
368 struct pipe_winsys
*winsys
= pipe
->winsys
;
369 const struct st_vertex_program
*vp
;
370 const struct pipe_shader_state
*vs
;
371 struct pipe_buffer_handle
*index_buffer_handle
= 0;
372 struct pipe_vertex_buffer vbuffer
[PIPE_MAX_SHADER_INPUTS
];
374 ubyte
*mapped_constants
;
376 assert(ctx
->RenderMode
== GL_SELECT
||
377 ctx
->RenderMode
== GL_FEEDBACK
);
380 st_validate_state(ctx
->st
);
382 /* must get these after state validation! */
384 vs
= &ctx
->st
->state
.vs
->state
;
387 * Set up the draw module's state.
389 * We'd like to do this less frequently, but the normal state-update
390 * code sends state updates to the pipe, not to our private draw module.
393 draw_set_viewport_state(draw
, &st
->state
.viewport
);
394 draw_set_clip_state(draw
, &st
->state
.clip
);
395 draw_set_rasterizer_state(draw
, &st
->state
.rasterizer
->state
);
396 draw_bind_vertex_shader(draw
, st
->state
.vs
->data
);
397 set_feedback_vertex_format(ctx
);
399 /* loop over TGSI shader inputs to determine vertex buffer
402 for (attr
= 0; attr
< vs
->num_inputs
; attr
++) {
403 const GLuint mesaAttr
= vp
->index_to_input
[attr
];
404 struct gl_buffer_object
*bufobj
= arrays
[mesaAttr
]->BufferObj
;
405 struct pipe_vertex_element velement
;
408 if (bufobj
&& bufobj
->Name
) {
409 /* Attribute data is in a VBO.
410 * Recall that for VBOs, the gl_client_array->Ptr field is
411 * really an offset from the start of the VBO, not a pointer.
413 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
414 assert(stobj
->buffer
);
416 vbuffer
[attr
].buffer
= NULL
;
417 winsys
->buffer_reference(winsys
, &vbuffer
[attr
].buffer
, stobj
->buffer
);
418 vbuffer
[attr
].buffer_offset
= (unsigned) arrays
[0]->Ptr
;/* in bytes */
419 velement
.src_offset
= arrays
[mesaAttr
]->Ptr
- arrays
[0]->Ptr
;
422 /* attribute data is in user-space memory, not a VBO */
423 uint bytes
= (arrays
[mesaAttr
]->Size
424 * _mesa_sizeof_type(arrays
[mesaAttr
]->Type
)
429 = winsys
->user_buffer_create(winsys
,
430 (void *) arrays
[mesaAttr
]->Ptr
,
432 vbuffer
[attr
].buffer_offset
= 0;
433 velement
.src_offset
= 0;
436 /* common-case setup */
437 vbuffer
[attr
].pitch
= arrays
[mesaAttr
]->StrideB
; /* in bytes */
438 vbuffer
[attr
].max_index
= 0; /* need this? */
439 velement
.vertex_buffer_index
= attr
;
440 velement
.dst_offset
= 0; /* need this? */
441 velement
.src_format
= pipe_vertex_format(arrays
[mesaAttr
]->Type
,
442 arrays
[mesaAttr
]->Size
);
443 assert(velement
.src_format
);
445 /* tell draw about this attribute */
446 draw_set_vertex_buffer(draw
, attr
, &vbuffer
[attr
]);
447 draw_set_vertex_element(draw
, attr
, &velement
);
449 /* map the attrib buffer */
450 map
= pipe
->winsys
->buffer_map(pipe
->winsys
,
451 vbuffer
[attr
].buffer
,
452 PIPE_BUFFER_FLAG_READ
);
453 draw_set_mapped_vertex_buffer(draw
, attr
, map
);
458 struct gl_buffer_object
*bufobj
= ib
->obj
;
459 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
460 index_buffer_handle
= stobj
->buffer
;
464 case GL_UNSIGNED_INT
:
467 case GL_UNSIGNED_SHORT
:
474 map
= pipe
->winsys
->buffer_map(pipe
->winsys
,
476 PIPE_BUFFER_FLAG_READ
);
477 draw_set_mapped_element_buffer(draw
, indexSize
, map
);
480 /* no index/element buffer */
481 draw_set_mapped_element_buffer(draw
, 0, NULL
);
485 /* map constant buffers */
486 mapped_constants
= winsys
->buffer_map(winsys
,
487 st
->state
.constants
[PIPE_SHADER_VERTEX
].buffer
,
488 PIPE_BUFFER_FLAG_READ
);
489 draw_set_mapped_constant_buffer(st
->draw
, mapped_constants
);
493 for (i
= 0; i
< nr_prims
; i
++) {
494 draw_arrays(draw
, prims
[i
].mode
, prims
[i
].start
, prims
[i
].count
);
498 /* unmap constant buffers */
499 winsys
->buffer_unmap(winsys
, st
->state
.constants
[PIPE_SHADER_VERTEX
].buffer
);
502 * unmap vertex/index buffers
504 for (i
= 0; i
< PIPE_ATTRIB_MAX
; i
++) {
505 if (draw
->vertex_buffer
[i
].buffer
) {
506 pipe
->winsys
->buffer_unmap(pipe
->winsys
,
507 draw
->vertex_buffer
[i
].buffer
);
508 draw_set_mapped_vertex_buffer(draw
, i
, NULL
);
512 pipe
->winsys
->buffer_unmap(pipe
->winsys
, index_buffer_handle
);
513 draw_set_mapped_element_buffer(draw
, 0, NULL
);
519 void st_init_draw( struct st_context
*st
)
521 GLcontext
*ctx
= st
->ctx
;
522 struct vbo_context
*vbo
= (struct vbo_context
*) ctx
->swtnl_im
;
524 /* actually, not used here, but elsewhere */
525 create_default_attribs_buffer(st
);
528 assert(vbo
->draw_prims
);
529 vbo
->draw_prims
= st_draw_vbo
;
533 void st_destroy_draw( struct st_context
*st
)
535 destroy_default_attribs_buffer(st
);