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/**********************************************************
* Copyright 2008-2009 VMware, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
**********************************************************/
#include "util/u_inlines.h"
#include "pipe/p_defines.h"
#include "util/u_math.h"
#include "util/u_upload_mgr.h"
#include "svga_context.h"
#include "svga_state.h"
#include "svga_draw.h"
#include "svga_tgsi.h"
#include "svga_screen.h"
#include "svga_resource_buffer.h"
#include "svga_hw_reg.h"
static enum pipe_error
emit_hw_vs_vdecl(struct svga_context *svga, unsigned dirty)
{
const struct pipe_vertex_element *ve = svga->curr.velems->velem;
unsigned i;
unsigned neg_bias = 0;
assert(svga->curr.velems->count >=
svga->curr.vs->base.info.file_count[TGSI_FILE_INPUT]);
/* specify number of vertex element declarations to come */
svga_hwtnl_reset_vdecl( svga->hwtnl,
svga->curr.velems->count );
/**
* We can't set the VDECL offset to something negative, so we
* must calculate a common negative additional index bias, and modify
* the VDECL offsets accordingly so they *all* end up positive.
*
* Note that the exact value of the negative index bias is not that
* important, since we compensate for it when we calculate the vertex
* buffer offset below. The important thing is that all vertex buffer
* offsets remain positive.
*
* Note that we use a negative bias variable in order to make the
* rounding maths more easy to follow, and to avoid int / unsigned
* confusion.
*/
for (i = 0; i < svga->curr.velems->count; i++) {
const struct pipe_vertex_buffer *vb =
&svga->curr.vb[ve[i].vertex_buffer_index];
const struct svga_buffer *buffer;
unsigned int offset = vb->buffer_offset + ve[i].src_offset;
if (!vb->buffer)
continue;
buffer = svga_buffer(vb->buffer);
if (buffer->uploaded.start > offset) {
unsigned tmp_neg_bias = buffer->uploaded.start - offset;
if (vb->stride)
tmp_neg_bias = (tmp_neg_bias + vb->stride - 1) / vb->stride;
neg_bias = MAX2(neg_bias, tmp_neg_bias);
}
}
for (i = 0; i < svga->curr.velems->count; i++) {
const struct pipe_vertex_buffer *vb =
&svga->curr.vb[ve[i].vertex_buffer_index];
unsigned usage, index;
const struct svga_buffer *buffer;
SVGA3dVertexDecl decl;
if (!vb->buffer)
continue;
buffer = svga_buffer(vb->buffer);
svga_generate_vdecl_semantics( i, &usage, &index );
/* SVGA_NEW_VELEMENT
*/
decl.identity.type = svga->state.sw.ve_format[i];
decl.identity.method = SVGA3D_DECLMETHOD_DEFAULT;
decl.identity.usage = usage;
decl.identity.usageIndex = index;
decl.array.stride = vb->stride;
/* Compensate for partially uploaded vbo, and
* for the negative index bias.
*/
decl.array.offset = (vb->buffer_offset
+ ve[i].src_offset
+ neg_bias * vb->stride
- buffer->uploaded.start);
assert(decl.array.offset >= 0);
svga_hwtnl_vdecl( svga->hwtnl,
i,
&decl,
buffer->uploaded.buffer ? buffer->uploaded.buffer :
vb->buffer );
}
svga_hwtnl_set_index_bias( svga->hwtnl, -(int) neg_bias );
return PIPE_OK;
}
static enum pipe_error
emit_hw_vdecl(struct svga_context *svga, unsigned dirty)
{
/* SVGA_NEW_NEED_SWTNL
*/
if (svga->state.sw.need_swtnl)
return PIPE_OK; /* Do not emit during swtnl */
return emit_hw_vs_vdecl( svga, dirty );
}
struct svga_tracked_state svga_hw_vdecl =
{
"hw vertex decl state (hwtnl version)",
( SVGA_NEW_NEED_SWTNL |
SVGA_NEW_VELEMENT |
SVGA_NEW_VBUFFER |
SVGA_NEW_RAST |
SVGA_NEW_FS |
SVGA_NEW_VS ),
emit_hw_vdecl
};
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