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
36 * pipe->draw_elements(), pipe->draw_range_elements() or pipe->draw_arrays().
39 * Keith Whitwell <keith@tungstengraphics.com>
43 #include "main/imports.h"
44 #include "main/image.h"
45 #include "main/macros.h"
46 #include "shader/prog_uniform.h"
50 #include "st_context.h"
52 #include "st_cb_bufferobjects.h"
54 #include "st_program.h"
56 #include "pipe/p_context.h"
57 #include "pipe/p_defines.h"
58 #include "util/u_inlines.h"
59 #include "util/u_format.h"
60 #include "cso_cache/cso_context.h"
63 static GLuint double_types[4] = {
64 PIPE_FORMAT_R64_FLOAT,
65 PIPE_FORMAT_R64G64_FLOAT,
66 PIPE_FORMAT_R64G64B64_FLOAT,
67 PIPE_FORMAT_R64G64B64A64_FLOAT
70 static GLuint float_types[4] = {
71 PIPE_FORMAT_R32_FLOAT,
72 PIPE_FORMAT_R32G32_FLOAT,
73 PIPE_FORMAT_R32G32B32_FLOAT,
74 PIPE_FORMAT_R32G32B32A32_FLOAT
77 static GLuint uint_types_norm[4] = {
78 PIPE_FORMAT_R32_UNORM,
79 PIPE_FORMAT_R32G32_UNORM,
80 PIPE_FORMAT_R32G32B32_UNORM,
81 PIPE_FORMAT_R32G32B32A32_UNORM
84 static GLuint uint_types_scale[4] = {
85 PIPE_FORMAT_R32_USCALED,
86 PIPE_FORMAT_R32G32_USCALED,
87 PIPE_FORMAT_R32G32B32_USCALED,
88 PIPE_FORMAT_R32G32B32A32_USCALED
91 static GLuint int_types_norm[4] = {
92 PIPE_FORMAT_R32_SNORM,
93 PIPE_FORMAT_R32G32_SNORM,
94 PIPE_FORMAT_R32G32B32_SNORM,
95 PIPE_FORMAT_R32G32B32A32_SNORM
98 static GLuint int_types_scale[4] = {
99 PIPE_FORMAT_R32_SSCALED,
100 PIPE_FORMAT_R32G32_SSCALED,
101 PIPE_FORMAT_R32G32B32_SSCALED,
102 PIPE_FORMAT_R32G32B32A32_SSCALED
105 static GLuint ushort_types_norm[4] = {
106 PIPE_FORMAT_R16_UNORM,
107 PIPE_FORMAT_R16G16_UNORM,
108 PIPE_FORMAT_R16G16B16_UNORM,
109 PIPE_FORMAT_R16G16B16A16_UNORM
112 static GLuint ushort_types_scale[4] = {
113 PIPE_FORMAT_R16_USCALED,
114 PIPE_FORMAT_R16G16_USCALED,
115 PIPE_FORMAT_R16G16B16_USCALED,
116 PIPE_FORMAT_R16G16B16A16_USCALED
119 static GLuint short_types_norm[4] = {
120 PIPE_FORMAT_R16_SNORM,
121 PIPE_FORMAT_R16G16_SNORM,
122 PIPE_FORMAT_R16G16B16_SNORM,
123 PIPE_FORMAT_R16G16B16A16_SNORM
126 static GLuint short_types_scale[4] = {
127 PIPE_FORMAT_R16_SSCALED,
128 PIPE_FORMAT_R16G16_SSCALED,
129 PIPE_FORMAT_R16G16B16_SSCALED,
130 PIPE_FORMAT_R16G16B16A16_SSCALED
133 static GLuint ubyte_types_norm[4] = {
134 PIPE_FORMAT_R8_UNORM,
135 PIPE_FORMAT_R8G8_UNORM,
136 PIPE_FORMAT_R8G8B8_UNORM,
137 PIPE_FORMAT_R8G8B8A8_UNORM
140 static GLuint ubyte_types_scale[4] = {
141 PIPE_FORMAT_R8_USCALED,
142 PIPE_FORMAT_R8G8_USCALED,
143 PIPE_FORMAT_R8G8B8_USCALED,
144 PIPE_FORMAT_R8G8B8A8_USCALED
147 static GLuint byte_types_norm[4] = {
148 PIPE_FORMAT_R8_SNORM,
149 PIPE_FORMAT_R8G8_SNORM,
150 PIPE_FORMAT_R8G8B8_SNORM,
151 PIPE_FORMAT_R8G8B8A8_SNORM
154 static GLuint byte_types_scale[4] = {
155 PIPE_FORMAT_R8_SSCALED,
156 PIPE_FORMAT_R8G8_SSCALED,
157 PIPE_FORMAT_R8G8B8_SSCALED,
158 PIPE_FORMAT_R8G8B8A8_SSCALED
161 static GLuint fixed_types[4] = {
162 PIPE_FORMAT_R32_FIXED,
163 PIPE_FORMAT_R32G32_FIXED,
164 PIPE_FORMAT_R32G32B32_FIXED,
165 PIPE_FORMAT_R32G32B32A32_FIXED
171 * Return a PIPE_FORMAT_x for the given GL datatype and size.
174 st_pipe_vertex_format(GLenum type, GLuint size, GLenum format,
175 GLboolean normalized)
177 assert((type >= GL_BYTE && type <= GL_DOUBLE) ||
181 assert(format == GL_RGBA || format == GL_BGRA);
183 if (format == GL_BGRA) {
184 /* this is an odd-ball case */
185 assert(type == GL_UNSIGNED_BYTE);
187 return PIPE_FORMAT_B8G8R8A8_UNORM;
192 case GL_DOUBLE: return double_types[size-1];
193 case GL_FLOAT: return float_types[size-1];
194 case GL_INT: return int_types_norm[size-1];
195 case GL_SHORT: return short_types_norm[size-1];
196 case GL_BYTE: return byte_types_norm[size-1];
197 case GL_UNSIGNED_INT: return uint_types_norm[size-1];
198 case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1];
199 case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1];
200 case GL_FIXED: return fixed_types[size-1];
201 default: assert(0); return 0;
206 case GL_DOUBLE: return double_types[size-1];
207 case GL_FLOAT: return float_types[size-1];
208 case GL_INT: return int_types_scale[size-1];
209 case GL_SHORT: return short_types_scale[size-1];
210 case GL_BYTE: return byte_types_scale[size-1];
211 case GL_UNSIGNED_INT: return uint_types_scale[size-1];
212 case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1];
213 case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1];
214 case GL_FIXED: return fixed_types[size-1];
215 default: assert(0); return 0;
218 return 0; /* silence compiler warning */
226 * Examine the active arrays to determine if we have interleaved
227 * vertex arrays all living in one VBO, or all living in user space.
228 * \param userSpace returns whether the arrays are in user space.
231 is_interleaved_arrays(const struct st_vertex_program *vp,
232 const struct st_vp_varient *vpv,
233 const struct gl_client_array **arrays,
234 GLboolean *userSpace)
237 const struct gl_buffer_object *firstBufObj = NULL;
238 GLint firstStride = -1;
239 GLuint num_client_arrays = 0;
240 const GLubyte *client_addr = NULL;
242 for (attr = 0; attr < vpv->num_inputs; attr++) {
243 const GLuint mesaAttr = vp->index_to_input[attr];
244 const struct gl_buffer_object *bufObj = arrays[mesaAttr]->BufferObj;
245 const GLsizei stride = arrays[mesaAttr]->StrideB; /* in bytes */
247 if (firstStride < 0) {
248 firstStride = stride;
250 else if (firstStride != stride) {
254 if (!bufObj || !bufObj->Name) {
256 /* Try to detect if the client-space arrays are
257 * "close" to each other.
260 client_addr = arrays[mesaAttr]->Ptr;
262 else if (abs(arrays[mesaAttr]->Ptr - client_addr) > firstStride) {
263 /* arrays start too far apart */
267 else if (!firstBufObj) {
268 firstBufObj = bufObj;
270 else if (bufObj != firstBufObj) {
275 *userSpace = (num_client_arrays == vpv->num_inputs);
276 /* debug_printf("user space: %s (%d arrays, %d inputs)\n",
277 (int)*userSpace ? "Yes" : "No", num_client_arrays, vp->num_inputs); */
284 * Compute the memory range occupied by the arrays.
287 get_arrays_bounds(const struct st_vertex_program *vp,
288 const struct st_vp_varient *vpv,
289 const struct gl_client_array **arrays,
291 const GLubyte **low, const GLubyte **high)
293 const GLubyte *low_addr = NULL;
294 const GLubyte *high_addr = NULL;
297 /* debug_printf("get_arrays_bounds: Handling %u attrs\n", vpv->num_inputs); */
299 for (attr = 0; attr < vpv->num_inputs; attr++) {
300 const GLuint mesaAttr = vp->index_to_input[attr];
301 const GLint stride = arrays[mesaAttr]->StrideB;
302 const GLubyte *start = arrays[mesaAttr]->Ptr;
303 const unsigned sz = (arrays[mesaAttr]->Size *
304 _mesa_sizeof_type(arrays[mesaAttr]->Type));
305 const GLubyte *end = start + (max_index * stride) + sz;
307 /* debug_printf("attr %u: stride %d size %u start %p end %p\n",
308 attr, stride, sz, start, end); */
315 low_addr = MIN2(low_addr, start);
316 high_addr = MAX2(high_addr, end);
326 * Set up for drawing interleaved arrays that all live in one VBO
327 * or all live in user space.
328 * \param vbuffer returns vertex buffer info
329 * \param velements returns vertex element info
332 setup_interleaved_attribs(GLcontext *ctx,
333 const struct st_vertex_program *vp,
334 const struct st_vp_varient *vpv,
335 const struct gl_client_array **arrays,
338 struct pipe_vertex_buffer *vbuffer,
339 struct pipe_vertex_element velements[])
341 struct pipe_context *pipe = ctx->st->pipe;
343 const GLubyte *offset0 = NULL;
345 for (attr = 0; attr < vpv->num_inputs; attr++) {
346 const GLuint mesaAttr = vp->index_to_input[attr];
347 struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
348 struct st_buffer_object *stobj = st_buffer_object(bufobj);
349 GLsizei stride = arrays[mesaAttr]->StrideB;
351 /*printf("stobj %u = %p\n", attr, (void*)stobj);*/
354 const GLubyte *low, *high;
356 get_arrays_bounds(vp, vpv, arrays, max_index, &low, &high);
357 /* debug_printf("buffer range: %p %p range %d max index %u\n",
358 low, high, high - low, max_index); */
363 pipe_user_buffer_create(pipe->screen, (void *) low, high - low,
364 PIPE_BIND_VERTEX_BUFFER);
365 vbuffer->buffer_offset = 0;
368 vbuffer->buffer = NULL;
369 pipe_resource_reference(&vbuffer->buffer, stobj->buffer);
370 vbuffer->buffer_offset = pointer_to_offset(low);
372 vbuffer->stride = stride; /* in bytes */
373 vbuffer->max_index = max_index;
376 velements[attr].src_offset =
377 (unsigned) (arrays[mesaAttr]->Ptr - offset0);
378 velements[attr].instance_divisor = 0;
379 velements[attr].vertex_buffer_index = 0;
380 velements[attr].src_format =
381 st_pipe_vertex_format(arrays[mesaAttr]->Type,
382 arrays[mesaAttr]->Size,
383 arrays[mesaAttr]->Format,
384 arrays[mesaAttr]->Normalized);
385 assert(velements[attr].src_format);
391 * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each
393 * \param vbuffer returns vertex buffer info
394 * \param velements returns vertex element info
397 setup_non_interleaved_attribs(GLcontext *ctx,
398 const struct st_vertex_program *vp,
399 const struct st_vp_varient *vpv,
400 const struct gl_client_array **arrays,
402 GLboolean *userSpace,
403 struct pipe_vertex_buffer vbuffer[],
404 struct pipe_vertex_element velements[])
406 struct pipe_context *pipe = ctx->st->pipe;
409 for (attr = 0; attr < vpv->num_inputs; attr++) {
410 const GLuint mesaAttr = vp->index_to_input[attr];
411 struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
412 GLsizei stride = arrays[mesaAttr]->StrideB;
414 *userSpace = GL_FALSE;
416 if (bufobj && bufobj->Name) {
417 /* Attribute data is in a VBO.
418 * Recall that for VBOs, the gl_client_array->Ptr field is
419 * really an offset from the start of the VBO, not a pointer.
421 struct st_buffer_object *stobj = st_buffer_object(bufobj);
422 assert(stobj->buffer);
423 /*printf("stobj %u = %p\n", attr, (void*) stobj);*/
425 vbuffer[attr].buffer = NULL;
426 pipe_resource_reference(&vbuffer[attr].buffer, stobj->buffer);
427 vbuffer[attr].buffer_offset = pointer_to_offset(arrays[mesaAttr]->Ptr);
428 velements[attr].src_offset = 0;
431 /* attribute data is in user-space memory, not a VBO */
433 /*printf("user-space array %d stride %d\n", attr, stride);*/
435 *userSpace = GL_TRUE;
438 if (arrays[mesaAttr]->Ptr) {
439 /* user's vertex array */
440 if (arrays[mesaAttr]->StrideB) {
441 bytes = arrays[mesaAttr]->StrideB * (max_index + 1);
444 bytes = arrays[mesaAttr]->Size
445 * _mesa_sizeof_type(arrays[mesaAttr]->Type);
447 vbuffer[attr].buffer =
448 pipe_user_buffer_create(pipe->screen,
449 (void *) arrays[mesaAttr]->Ptr, bytes,
450 PIPE_BIND_VERTEX_BUFFER);
453 /* no array, use ctx->Current.Attrib[] value */
454 bytes = sizeof(ctx->Current.Attrib[0]);
455 vbuffer[attr].buffer =
456 pipe_user_buffer_create(pipe->screen,
457 (void *) ctx->Current.Attrib[mesaAttr],
459 PIPE_BIND_VERTEX_BUFFER);
463 vbuffer[attr].buffer_offset = 0;
464 velements[attr].src_offset = 0;
467 assert(velements[attr].src_offset <= 2048); /* 11-bit field */
469 /* common-case setup */
470 vbuffer[attr].stride = stride; /* in bytes */
471 vbuffer[attr].max_index = max_index;
472 velements[attr].instance_divisor = 0;
473 velements[attr].vertex_buffer_index = attr;
474 velements[attr].src_format
475 = st_pipe_vertex_format(arrays[mesaAttr]->Type,
476 arrays[mesaAttr]->Size,
477 arrays[mesaAttr]->Format,
478 arrays[mesaAttr]->Normalized);
479 assert(velements[attr].src_format);
486 * Prior to drawing, check that any uniforms referenced by the
487 * current shader have been set. If a uniform has not been set,
491 check_uniforms(GLcontext *ctx)
493 const struct gl_shader_program *shProg = ctx->Shader.CurrentProgram;
494 if (shProg && shProg->LinkStatus) {
496 for (i = 0; i < shProg->Uniforms->NumUniforms; i++) {
497 const struct gl_uniform *u = &shProg->Uniforms->Uniforms[i];
498 if (!u->Initialized) {
500 "Using shader with uninitialized uniform: %s",
508 static unsigned translate_prim( GLcontext *ctx,
511 /* Avoid quadstrips if it's easy to do so:
513 if (prim == GL_QUAD_STRIP &&
514 ctx->Light.ShadeModel != GL_FLAT &&
515 ctx->Polygon.FrontMode == GL_FILL &&
516 ctx->Polygon.BackMode == GL_FILL)
517 prim = GL_TRIANGLE_STRIP;
523 * This function gets plugged into the VBO module and is called when
524 * we have something to render.
525 * Basically, translate the information into the format expected by gallium.
528 st_draw_vbo(GLcontext *ctx,
529 const struct gl_client_array **arrays,
530 const struct _mesa_prim *prims,
532 const struct _mesa_index_buffer *ib,
533 GLboolean index_bounds_valid,
537 struct pipe_context *pipe = ctx->st->pipe;
538 const struct st_vertex_program *vp;
539 const struct st_vp_varient *vpv;
540 struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
542 struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
543 unsigned num_vbuffers, num_velements;
544 GLboolean userSpace = GL_FALSE;
545 GLboolean vertDataEdgeFlags;
547 /* Mesa core state should have been validated already */
548 assert(ctx->NewState == 0x0);
550 /* Gallium probably doesn't want this in some cases. */
551 if (!index_bounds_valid)
552 if (!vbo_all_varyings_in_vbos(arrays))
553 vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);
555 /* sanity check for pointer arithmetic below */
556 assert(sizeof(arrays[0]->Ptr[0]) == 1);
558 vertDataEdgeFlags = arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj &&
559 arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj->Name;
560 if (vertDataEdgeFlags != ctx->st->vertdata_edgeflags) {
561 ctx->st->vertdata_edgeflags = vertDataEdgeFlags;
562 ctx->st->dirty.st |= ST_NEW_EDGEFLAGS_DATA;
565 st_validate_state(ctx->st);
567 /* must get these after state validation! */
569 vpv = ctx->st->vp_varient;
572 if (MESA_VERBOSE & VERBOSE_GLSL) {
576 (void) check_uniforms;
579 memset(velements, 0, sizeof(struct pipe_vertex_element) * vpv->num_inputs);
581 * Setup the vbuffer[] and velements[] arrays.
583 if (is_interleaved_arrays(vp, vpv, arrays, &userSpace)) {
584 /*printf("Draw interleaved\n");*/
585 setup_interleaved_attribs(ctx, vp, vpv, arrays, max_index, userSpace,
588 num_velements = vpv->num_inputs;
589 if (num_velements == 0)
593 /*printf("Draw non-interleaved\n");*/
594 setup_non_interleaved_attribs(ctx, vp, vpv, arrays, max_index,
595 &userSpace, vbuffer, velements);
596 num_vbuffers = vpv->num_inputs;
597 num_velements = vpv->num_inputs;
603 for (i = 0; i < num_vbuffers; i++) {
604 printf("buffers[%d].stride = %u\n", i, vbuffer[i].stride);
605 printf("buffers[%d].max_index = %u\n", i, vbuffer[i].max_index);
606 printf("buffers[%d].buffer_offset = %u\n", i, vbuffer[i].buffer_offset);
607 printf("buffers[%d].buffer = %p\n", i, (void*) vbuffer[i].buffer);
609 for (i = 0; i < num_velements; i++) {
610 printf("vlements[%d].vbuffer_index = %u\n", i, velements[i].vertex_buffer_index);
611 printf("vlements[%d].src_offset = %u\n", i, velements[i].src_offset);
612 printf("vlements[%d].format = %s\n", i, util_format_name(velements[i].src_format));
617 pipe->set_vertex_buffers(pipe, num_vbuffers, vbuffer);
618 cso_set_vertex_elements(ctx->st->cso_context, num_velements, velements);
620 if (num_vbuffers == 0 || num_velements == 0)
623 /* do actual drawing */
625 /* indexed primitive */
626 struct gl_buffer_object *bufobj = ib->obj;
627 struct pipe_resource *indexBuf = NULL;
628 unsigned indexSize, indexOffset, i;
632 case GL_UNSIGNED_INT:
635 case GL_UNSIGNED_SHORT:
638 case GL_UNSIGNED_BYTE:
646 /* get/create the index buffer object */
647 if (bufobj && bufobj->Name) {
648 /* elements/indexes are in a real VBO */
649 struct st_buffer_object *stobj = st_buffer_object(bufobj);
650 pipe_resource_reference(&indexBuf, stobj->buffer);
651 indexOffset = pointer_to_offset(ib->ptr) / indexSize;
654 /* element/indicies are in user space memory */
655 indexBuf = pipe_user_buffer_create(pipe->screen, (void *) ib->ptr,
656 ib->count * indexSize,
657 PIPE_BIND_INDEX_BUFFER);
662 if (pipe->draw_range_elements && min_index != ~0 && max_index != ~0) {
663 /* XXX: exercise temporary path to pass min/max directly
664 * through to driver & draw module. These interfaces still
665 * need a bit of work...
667 for (i = 0; i < nr_prims; i++) {
668 prim = translate_prim( ctx, prims[i].mode );
670 pipe->draw_range_elements(pipe, indexBuf, indexSize,
671 min_index, max_index, prim,
672 prims[i].start + indexOffset, prims[i].count);
676 for (i = 0; i < nr_prims; i++) {
677 prim = translate_prim( ctx, prims[i].mode );
679 if (prims[i].num_instances == 1) {
680 pipe->draw_elements(pipe, indexBuf, indexSize, prim,
681 prims[i].start + indexOffset,
685 pipe->draw_elements_instanced(pipe, indexBuf, indexSize, prim,
686 prims[i].start + indexOffset,
688 0, prims[i].num_instances);
693 pipe_resource_reference(&indexBuf, NULL);
700 for (i = 0; i < nr_prims; i++) {
701 prim = translate_prim( ctx, prims[i].mode );
703 if (prims[i].num_instances == 1) {
704 pipe->draw_arrays(pipe, prim, prims[i].start, prims[i].count);
707 pipe->draw_arrays_instanced(pipe, prim, prims[i].start,
709 0, prims[i].num_instances);
714 /* unreference buffers (frees wrapped user-space buffer objects) */
715 for (attr = 0; attr < num_vbuffers; attr++) {
716 pipe_resource_reference(&vbuffer[attr].buffer, NULL);
717 assert(!vbuffer[attr].buffer);
722 pipe->set_vertex_buffers(pipe, 0, NULL);
727 void st_init_draw( struct st_context *st )
729 GLcontext *ctx = st->ctx;
731 vbo_set_draw_func(ctx, st_draw_vbo);
735 void st_destroy_draw( struct st_context *st )