1 /**************************************************************************
3 * Copyright 2003 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 #include "main/glheader.h"
31 #include "main/bufferobj.h"
32 #include "main/context.h"
33 #include "main/enums.h"
36 #include "brw_defines.h"
37 #include "brw_context.h"
38 #include "brw_state.h"
40 #include "intel_batchbuffer.h"
41 #include "intel_buffer_objects.h"
43 static GLuint double_types[5] = {
45 BRW_SURFACEFORMAT_R64_FLOAT,
46 BRW_SURFACEFORMAT_R64G64_FLOAT,
47 BRW_SURFACEFORMAT_R64G64B64_FLOAT,
48 BRW_SURFACEFORMAT_R64G64B64A64_FLOAT
51 static GLuint float_types[5] = {
53 BRW_SURFACEFORMAT_R32_FLOAT,
54 BRW_SURFACEFORMAT_R32G32_FLOAT,
55 BRW_SURFACEFORMAT_R32G32B32_FLOAT,
56 BRW_SURFACEFORMAT_R32G32B32A32_FLOAT
59 static GLuint half_float_types[5] = {
61 BRW_SURFACEFORMAT_R16_FLOAT,
62 BRW_SURFACEFORMAT_R16G16_FLOAT,
63 BRW_SURFACEFORMAT_R16G16B16A16_FLOAT,
64 BRW_SURFACEFORMAT_R16G16B16A16_FLOAT
67 static GLuint uint_types_norm[5] = {
69 BRW_SURFACEFORMAT_R32_UNORM,
70 BRW_SURFACEFORMAT_R32G32_UNORM,
71 BRW_SURFACEFORMAT_R32G32B32_UNORM,
72 BRW_SURFACEFORMAT_R32G32B32A32_UNORM
75 static GLuint uint_types_scale[5] = {
77 BRW_SURFACEFORMAT_R32_USCALED,
78 BRW_SURFACEFORMAT_R32G32_USCALED,
79 BRW_SURFACEFORMAT_R32G32B32_USCALED,
80 BRW_SURFACEFORMAT_R32G32B32A32_USCALED
83 static GLuint int_types_norm[5] = {
85 BRW_SURFACEFORMAT_R32_SNORM,
86 BRW_SURFACEFORMAT_R32G32_SNORM,
87 BRW_SURFACEFORMAT_R32G32B32_SNORM,
88 BRW_SURFACEFORMAT_R32G32B32A32_SNORM
91 static GLuint int_types_scale[5] = {
93 BRW_SURFACEFORMAT_R32_SSCALED,
94 BRW_SURFACEFORMAT_R32G32_SSCALED,
95 BRW_SURFACEFORMAT_R32G32B32_SSCALED,
96 BRW_SURFACEFORMAT_R32G32B32A32_SSCALED
99 static GLuint ushort_types_norm[5] = {
101 BRW_SURFACEFORMAT_R16_UNORM,
102 BRW_SURFACEFORMAT_R16G16_UNORM,
103 BRW_SURFACEFORMAT_R16G16B16_UNORM,
104 BRW_SURFACEFORMAT_R16G16B16A16_UNORM
107 static GLuint ushort_types_scale[5] = {
109 BRW_SURFACEFORMAT_R16_USCALED,
110 BRW_SURFACEFORMAT_R16G16_USCALED,
111 BRW_SURFACEFORMAT_R16G16B16_USCALED,
112 BRW_SURFACEFORMAT_R16G16B16A16_USCALED
115 static GLuint short_types_norm[5] = {
117 BRW_SURFACEFORMAT_R16_SNORM,
118 BRW_SURFACEFORMAT_R16G16_SNORM,
119 BRW_SURFACEFORMAT_R16G16B16_SNORM,
120 BRW_SURFACEFORMAT_R16G16B16A16_SNORM
123 static GLuint short_types_scale[5] = {
125 BRW_SURFACEFORMAT_R16_SSCALED,
126 BRW_SURFACEFORMAT_R16G16_SSCALED,
127 BRW_SURFACEFORMAT_R16G16B16_SSCALED,
128 BRW_SURFACEFORMAT_R16G16B16A16_SSCALED
131 static GLuint ubyte_types_norm[5] = {
133 BRW_SURFACEFORMAT_R8_UNORM,
134 BRW_SURFACEFORMAT_R8G8_UNORM,
135 BRW_SURFACEFORMAT_R8G8B8_UNORM,
136 BRW_SURFACEFORMAT_R8G8B8A8_UNORM
139 static GLuint ubyte_types_scale[5] = {
141 BRW_SURFACEFORMAT_R8_USCALED,
142 BRW_SURFACEFORMAT_R8G8_USCALED,
143 BRW_SURFACEFORMAT_R8G8B8_USCALED,
144 BRW_SURFACEFORMAT_R8G8B8A8_USCALED
147 static GLuint byte_types_norm[5] = {
149 BRW_SURFACEFORMAT_R8_SNORM,
150 BRW_SURFACEFORMAT_R8G8_SNORM,
151 BRW_SURFACEFORMAT_R8G8B8_SNORM,
152 BRW_SURFACEFORMAT_R8G8B8A8_SNORM
155 static GLuint byte_types_scale[5] = {
157 BRW_SURFACEFORMAT_R8_SSCALED,
158 BRW_SURFACEFORMAT_R8G8_SSCALED,
159 BRW_SURFACEFORMAT_R8G8B8_SSCALED,
160 BRW_SURFACEFORMAT_R8G8B8A8_SSCALED
165 * Given vertex array type/size/format/normalized info, return
166 * the appopriate hardware surface type.
167 * Format will be GL_RGBA or possibly GL_BGRA for GLubyte[4] color arrays.
169 static GLuint get_surface_type( GLenum type, GLuint size,
170 GLenum format, GLboolean normalized )
172 if (unlikely(INTEL_DEBUG & DEBUG_VERTS))
173 printf("type %s size %d normalized %d\n",
174 _mesa_lookup_enum_by_nr(type), size, normalized);
178 case GL_DOUBLE: return double_types[size];
179 case GL_FLOAT: return float_types[size];
180 case GL_HALF_FLOAT: return half_float_types[size];
181 case GL_INT: return int_types_norm[size];
182 case GL_SHORT: return short_types_norm[size];
183 case GL_BYTE: return byte_types_norm[size];
184 case GL_UNSIGNED_INT: return uint_types_norm[size];
185 case GL_UNSIGNED_SHORT: return ushort_types_norm[size];
186 case GL_UNSIGNED_BYTE:
187 if (format == GL_BGRA) {
188 /* See GL_EXT_vertex_array_bgra */
190 return BRW_SURFACEFORMAT_B8G8R8A8_UNORM;
193 return ubyte_types_norm[size];
195 default: assert(0); return 0;
199 assert(format == GL_RGBA); /* sanity check */
201 case GL_DOUBLE: return double_types[size];
202 case GL_FLOAT: return float_types[size];
203 case GL_HALF_FLOAT: return half_float_types[size];
204 case GL_INT: return int_types_scale[size];
205 case GL_SHORT: return short_types_scale[size];
206 case GL_BYTE: return byte_types_scale[size];
207 case GL_UNSIGNED_INT: return uint_types_scale[size];
208 case GL_UNSIGNED_SHORT: return ushort_types_scale[size];
209 case GL_UNSIGNED_BYTE: return ubyte_types_scale[size];
210 default: assert(0); return 0;
216 static GLuint get_size( GLenum type )
219 case GL_DOUBLE: return sizeof(GLdouble);
220 case GL_FLOAT: return sizeof(GLfloat);
221 case GL_HALF_FLOAT: return sizeof(GLhalfARB);
222 case GL_INT: return sizeof(GLint);
223 case GL_SHORT: return sizeof(GLshort);
224 case GL_BYTE: return sizeof(GLbyte);
225 case GL_UNSIGNED_INT: return sizeof(GLuint);
226 case GL_UNSIGNED_SHORT: return sizeof(GLushort);
227 case GL_UNSIGNED_BYTE: return sizeof(GLubyte);
232 static GLuint get_index_type(GLenum type)
235 case GL_UNSIGNED_BYTE: return BRW_INDEX_BYTE;
236 case GL_UNSIGNED_SHORT: return BRW_INDEX_WORD;
237 case GL_UNSIGNED_INT: return BRW_INDEX_DWORD;
238 default: assert(0); return 0;
243 copy_array_to_vbo_array(struct brw_context *brw,
244 struct brw_vertex_element *element,
246 struct brw_vertex_buffer *buffer,
249 int src_stride = element->glarray->StrideB;
250 const unsigned char *src = element->glarray->Ptr + min * src_stride;
251 int count = max - min + 1;
252 GLuint size = count * dst_stride;
254 if (dst_stride == src_stride) {
255 intel_upload_data(&brw->intel, src, size, dst_stride,
256 &buffer->bo, &buffer->offset);
258 char * const map = intel_upload_map(&brw->intel, size, dst_stride);
262 memcpy(dst, src, dst_stride);
266 intel_upload_unmap(&brw->intel, map, size, dst_stride,
267 &buffer->bo, &buffer->offset);
269 buffer->stride = dst_stride;
272 static void brw_prepare_vertices(struct brw_context *brw)
274 struct gl_context *ctx = &brw->intel.ctx;
275 struct intel_context *intel = intel_context(ctx);
276 GLbitfield vs_inputs = brw->vs.prog_data->inputs_read;
277 const unsigned char *ptr = NULL;
278 GLuint interleaved = 0, total_size = 0;
279 unsigned int min_index = brw->vb.min_index;
280 unsigned int max_index = brw->vb.max_index;
283 struct brw_vertex_element *upload[VERT_ATTRIB_MAX];
284 GLuint nr_uploads = 0;
286 /* First build an array of pointers to ve's in vb.inputs_read
289 printf("%s %d..%d\n", __FUNCTION__, min_index, max_index);
291 /* Accumulate the list of enabled arrays. */
292 brw->vb.nr_enabled = 0;
294 GLuint i = _mesa_ffsll(vs_inputs) - 1;
295 struct brw_vertex_element *input = &brw->vb.inputs[i];
297 vs_inputs &= ~(1 << i);
298 brw->vb.enabled[brw->vb.nr_enabled++] = input;
301 if (brw->vb.nr_enabled == 0)
304 if (brw->vb.nr_buffers)
307 /* XXX: In the rare cases where this happens we fallback all
308 * the way to software rasterization, although a tnl fallback
309 * would be sufficient. I don't know of *any* real world
310 * cases with > 17 vertex attributes enabled, so it probably
311 * isn't an issue at this point.
313 if (brw->vb.nr_enabled >= BRW_VEP_MAX) {
314 intel->Fallback = GL_TRUE; /* boolean, not bitfield */
318 for (i = j = 0; i < brw->vb.nr_enabled; i++) {
319 struct brw_vertex_element *input = brw->vb.enabled[i];
320 const struct gl_client_array *glarray = input->glarray;
321 int type_size = get_size(glarray->Type);
323 input->element_size = type_size * glarray->Size;
325 if (_mesa_is_bufferobj(glarray->BufferObj)) {
326 struct intel_buffer_object *intel_buffer =
327 intel_buffer_object(glarray->BufferObj);
330 for (k = 0; k < i; k++) {
331 const struct gl_client_array *other = brw->vb.enabled[k]->glarray;
332 if (glarray->BufferObj == other->BufferObj &&
333 glarray->StrideB == other->StrideB &&
334 (uintptr_t)(glarray->Ptr - other->Ptr) < glarray->StrideB)
336 input->buffer = brw->vb.enabled[k]->buffer;
337 input->offset = glarray->Ptr - other->Ptr;
342 struct brw_vertex_buffer *buffer = &brw->vb.buffers[j];
344 /* Named buffer object: Just reference its contents directly. */
345 buffer->bo = intel_bufferobj_source(intel, intel_buffer,
347 drm_intel_bo_reference(buffer->bo);
348 buffer->offset += (uintptr_t)glarray->Ptr;
349 buffer->stride = glarray->StrideB;
355 /* This is a common place to reach if the user mistakenly supplies
356 * a pointer in place of a VBO offset. If we just let it go through,
357 * we may end up dereferencing a pointer beyond the bounds of the
358 * GTT. We would hope that the VBO's max_index would save us, but
359 * Mesa appears to hand us min/max values not clipped to the
360 * array object's _MaxElement, and _MaxElement frequently appears
361 * to be wrong anyway.
363 * The VBO spec allows application termination in this case, and it's
364 * probably a service to the poor programmer to do so rather than
365 * trying to just not render.
367 assert(input->offset < brw->vb.buffers[input->buffer].bo->size);
369 /* Queue the buffer object up to be uploaded in the next pass,
370 * when we've decided if we're doing interleaved or not.
372 if (nr_uploads == 0) {
373 /* Position array not properly enabled:
375 if (input->attrib == VERT_ATTRIB_POS && glarray->StrideB == 0) {
376 intel->Fallback = GL_TRUE; /* boolean, not bitfield */
380 interleaved = glarray->StrideB;
383 else if (interleaved != glarray->StrideB ||
384 (uintptr_t)(glarray->Ptr - ptr) > interleaved)
388 else if ((uintptr_t)(glarray->Ptr - ptr) & (type_size -1))
390 /* enforce natural alignment (for doubles) */
394 upload[nr_uploads++] = input;
395 total_size = ALIGN(total_size, type_size);
396 total_size += input->element_size;
400 /* If we need to upload all the arrays, then we can trim those arrays to
401 * only the used elements [min_index, max_index] so long as we adjust all
402 * the values used in the 3DPRIMITIVE i.e. by setting the vertex bias.
404 if (nr_uploads == brw->vb.nr_enabled) {
405 brw->vb.start_vertex_bias = min_index;
407 brw->vb.start_vertex_bias = 0;
411 /* Handle any arrays to be uploaded. */
412 if (nr_uploads > 1) {
413 if (interleaved && interleaved <= 2*total_size) {
414 /* All uploads are interleaved, so upload the arrays together as
415 * interleaved. First, upload the contents and set up upload[0].
417 copy_array_to_vbo_array(brw, upload[0], min_index, max_index,
418 &brw->vb.buffers[j], interleaved);
420 for (i = 0; i < nr_uploads; i++) {
421 /* Then, just point upload[i] at upload[0]'s buffer. */
423 ((const unsigned char *)upload[i]->glarray->Ptr - ptr);
424 upload[i]->buffer = j;
430 else if (total_size < 2048) {
431 /* Upload non-interleaved arrays into a single interleaved array */
432 struct brw_vertex_buffer *buffer;
433 int count = max_index - min_index + 1;
437 map = intel_upload_map(&brw->intel, total_size * count, total_size);
438 for (i = offset = 0; i < nr_uploads; i++) {
439 const unsigned char *src = upload[i]->glarray->Ptr;
440 int size = upload[i]->element_size;
441 int stride = upload[i]->glarray->StrideB;
445 offset = ALIGN(offset, get_size(upload[i]->glarray->Type));
447 src += min_index * stride;
449 for (n = 0; n < count; n++) {
450 memcpy(dst, src, size);
455 upload[i]->offset = offset;
456 upload[i]->buffer = j;
460 assert(offset == total_size);
461 buffer = &brw->vb.buffers[j++];
462 intel_upload_unmap(&brw->intel, map, offset * count, offset,
463 &buffer->bo, &buffer->offset);
464 buffer->stride = offset;
469 /* Upload non-interleaved arrays */
470 for (i = 0; i < nr_uploads; i++) {
471 copy_array_to_vbo_array(brw, upload[i], min_index, max_index,
472 &brw->vb.buffers[j], upload[i]->element_size);
473 upload[i]->buffer = j++;
474 upload[i]->offset = 0;
477 /* can we simply extend the current vb? */
478 if (j == brw->vb.nr_current_buffers) {
480 for (i = 0; i < j; i++) {
483 if (brw->vb.current_buffers[i].handle != brw->vb.buffers[i].bo->handle ||
484 brw->vb.current_buffers[i].stride != brw->vb.buffers[i].stride)
487 d = brw->vb.buffers[i].offset - brw->vb.current_buffers[i].offset;
489 delta = d / brw->vb.current_buffers[i].stride;
490 if (delta * brw->vb.current_buffers[i].stride != d)
495 brw->vb.start_vertex_bias += delta;
497 drm_intel_bo_unreference(brw->vb.buffers[j].bo);
502 brw->vb.nr_buffers = j;
505 brw_prepare_query_begin(brw);
506 for (i = 0; i < brw->vb.nr_buffers; i++) {
507 brw_add_validated_bo(brw, brw->vb.buffers[i].bo);
511 static void brw_emit_vertices(struct brw_context *brw)
513 struct gl_context *ctx = &brw->intel.ctx;
514 struct intel_context *intel = intel_context(ctx);
517 brw_emit_query_begin(brw);
519 /* If the VS doesn't read any inputs (calculating vertex position from
520 * a state variable for some reason, for example), emit a single pad
521 * VERTEX_ELEMENT struct and bail.
523 * The stale VB state stays in place, but they don't do anything unless
524 * a VE loads from them.
526 if (brw->vb.nr_enabled == 0) {
528 OUT_BATCH((CMD_VERTEX_ELEMENT << 16) | 1);
529 if (intel->gen >= 6) {
530 OUT_BATCH((0 << GEN6_VE0_INDEX_SHIFT) |
532 (BRW_SURFACEFORMAT_R32G32B32A32_FLOAT << BRW_VE0_FORMAT_SHIFT) |
533 (0 << BRW_VE0_SRC_OFFSET_SHIFT));
535 OUT_BATCH((0 << BRW_VE0_INDEX_SHIFT) |
537 (BRW_SURFACEFORMAT_R32G32B32A32_FLOAT << BRW_VE0_FORMAT_SHIFT) |
538 (0 << BRW_VE0_SRC_OFFSET_SHIFT));
540 OUT_BATCH((BRW_VE1_COMPONENT_STORE_0 << BRW_VE1_COMPONENT_0_SHIFT) |
541 (BRW_VE1_COMPONENT_STORE_0 << BRW_VE1_COMPONENT_1_SHIFT) |
542 (BRW_VE1_COMPONENT_STORE_0 << BRW_VE1_COMPONENT_2_SHIFT) |
543 (BRW_VE1_COMPONENT_STORE_1_FLT << BRW_VE1_COMPONENT_3_SHIFT));
548 /* Now emit VB and VEP state packets.
551 if (brw->vb.nr_buffers) {
552 BEGIN_BATCH(1 + 4*brw->vb.nr_buffers);
553 OUT_BATCH((CMD_VERTEX_BUFFER << 16) | (4*brw->vb.nr_buffers - 1));
554 for (i = 0; i < brw->vb.nr_buffers; i++) {
555 struct brw_vertex_buffer *buffer = &brw->vb.buffers[i];
558 if (intel->gen >= 6) {
559 dw0 = GEN6_VB0_ACCESS_VERTEXDATA | (i << GEN6_VB0_INDEX_SHIFT);
561 dw0 = BRW_VB0_ACCESS_VERTEXDATA | (i << BRW_VB0_INDEX_SHIFT);
564 OUT_BATCH(dw0 | (buffer->stride << BRW_VB0_PITCH_SHIFT));
565 OUT_RELOC(buffer->bo, I915_GEM_DOMAIN_VERTEX, 0, buffer->offset);
566 if (intel->gen >= 5) {
567 OUT_RELOC(buffer->bo, I915_GEM_DOMAIN_VERTEX, 0, buffer->bo->size - 1);
569 OUT_BATCH(buffer->bo->size / buffer->stride);
570 OUT_BATCH(0); /* Instance data step rate */
572 brw->vb.current_buffers[i].handle = buffer->bo->handle;
573 brw->vb.current_buffers[i].offset = buffer->offset;
574 brw->vb.current_buffers[i].stride = buffer->stride;
576 brw->vb.nr_current_buffers = i;
580 BEGIN_BATCH(1 + brw->vb.nr_enabled * 2);
581 OUT_BATCH((CMD_VERTEX_ELEMENT << 16) | (2*brw->vb.nr_enabled - 1));
582 for (i = 0; i < brw->vb.nr_enabled; i++) {
583 struct brw_vertex_element *input = brw->vb.enabled[i];
584 uint32_t format = get_surface_type(input->glarray->Type,
585 input->glarray->Size,
586 input->glarray->Format,
587 input->glarray->Normalized);
588 uint32_t comp0 = BRW_VE1_COMPONENT_STORE_SRC;
589 uint32_t comp1 = BRW_VE1_COMPONENT_STORE_SRC;
590 uint32_t comp2 = BRW_VE1_COMPONENT_STORE_SRC;
591 uint32_t comp3 = BRW_VE1_COMPONENT_STORE_SRC;
593 switch (input->glarray->Size) {
594 case 0: comp0 = BRW_VE1_COMPONENT_STORE_0;
595 case 1: comp1 = BRW_VE1_COMPONENT_STORE_0;
596 case 2: comp2 = BRW_VE1_COMPONENT_STORE_0;
597 case 3: comp3 = BRW_VE1_COMPONENT_STORE_1_FLT;
601 if (intel->gen >= 6) {
602 OUT_BATCH((input->buffer << GEN6_VE0_INDEX_SHIFT) |
604 (format << BRW_VE0_FORMAT_SHIFT) |
605 (input->offset << BRW_VE0_SRC_OFFSET_SHIFT));
607 OUT_BATCH((input->buffer << BRW_VE0_INDEX_SHIFT) |
609 (format << BRW_VE0_FORMAT_SHIFT) |
610 (input->offset << BRW_VE0_SRC_OFFSET_SHIFT));
614 OUT_BATCH((comp0 << BRW_VE1_COMPONENT_0_SHIFT) |
615 (comp1 << BRW_VE1_COMPONENT_1_SHIFT) |
616 (comp2 << BRW_VE1_COMPONENT_2_SHIFT) |
617 (comp3 << BRW_VE1_COMPONENT_3_SHIFT));
619 OUT_BATCH((comp0 << BRW_VE1_COMPONENT_0_SHIFT) |
620 (comp1 << BRW_VE1_COMPONENT_1_SHIFT) |
621 (comp2 << BRW_VE1_COMPONENT_2_SHIFT) |
622 (comp3 << BRW_VE1_COMPONENT_3_SHIFT) |
623 ((i * 4) << BRW_VE1_DST_OFFSET_SHIFT));
628 const struct brw_tracked_state brw_vertices = {
631 .brw = BRW_NEW_BATCH | BRW_NEW_VERTICES,
634 .prepare = brw_prepare_vertices,
635 .emit = brw_emit_vertices,
638 static void brw_prepare_indices(struct brw_context *brw)
640 struct gl_context *ctx = &brw->intel.ctx;
641 struct intel_context *intel = &brw->intel;
642 const struct _mesa_index_buffer *index_buffer = brw->ib.ib;
644 drm_intel_bo *bo = NULL;
645 struct gl_buffer_object *bufferobj;
649 if (index_buffer == NULL)
652 ib_type_size = get_size(index_buffer->type);
653 ib_size = ib_type_size * index_buffer->count;
654 bufferobj = index_buffer->obj;
656 /* Turn into a proper VBO:
658 if (!_mesa_is_bufferobj(bufferobj)) {
660 /* Get new bufferobj, offset:
662 intel_upload_data(&brw->intel, index_buffer->ptr, ib_size, ib_type_size,
664 brw->ib.start_vertex_offset = offset / ib_type_size;
667 offset = (GLuint) (unsigned long) index_buffer->ptr;
669 /* If the index buffer isn't aligned to its element size, we have to
670 * rebase it into a temporary.
672 if ((get_size(index_buffer->type) - 1) & offset) {
673 GLubyte *map = ctx->Driver.MapBuffer(ctx,
674 GL_ELEMENT_ARRAY_BUFFER_ARB,
679 intel_upload_data(&brw->intel, map, ib_size, ib_type_size,
681 brw->ib.start_vertex_offset = offset / ib_type_size;
684 ctx->Driver.UnmapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER_ARB, bufferobj);
686 /* Use CMD_3D_PRIM's start_vertex_offset to avoid re-uploading
687 * the index buffer state when we're just moving the start index
690 brw->ib.start_vertex_offset = offset / ib_type_size;
692 bo = intel_bufferobj_source(intel, intel_buffer_object(bufferobj),
694 drm_intel_bo_reference(bo);
698 if (brw->ib.bo != bo || brw->ib.offset != offset) {
699 drm_intel_bo_unreference(brw->ib.bo);
701 brw->ib.offset = offset;
703 brw_add_validated_bo(brw, brw->ib.bo);
704 brw->state.dirty.brw |= BRW_NEW_INDEX_BUFFER;
706 drm_intel_bo_unreference(bo);
710 const struct brw_tracked_state brw_indices = {
713 .brw = BRW_NEW_INDICES,
716 .prepare = brw_prepare_indices,
719 static void brw_emit_index_buffer(struct brw_context *brw)
721 struct intel_context *intel = &brw->intel;
722 const struct _mesa_index_buffer *index_buffer = brw->ib.ib;
724 if (index_buffer == NULL)
728 OUT_BATCH(CMD_INDEX_BUFFER << 16 |
729 /* cut index enable << 10 */
730 get_index_type(index_buffer->type) << 8 |
732 OUT_RELOC(brw->ib.bo,
733 I915_GEM_DOMAIN_VERTEX, 0,
735 OUT_RELOC(brw->ib.bo,
736 I915_GEM_DOMAIN_VERTEX, 0,
737 brw->ib.bo->size - 1);
741 const struct brw_tracked_state brw_index_buffer = {
744 .brw = BRW_NEW_BATCH | BRW_NEW_INDEX_BUFFER,
747 .emit = brw_emit_index_buffer,