enum pipe_error
svga_hwtnl_simple_draw_range_elements(struct svga_hwtnl *hwtnl,
struct pipe_resource *index_buffer,
unsigned index_size, int index_bias,
unsigned min_index, unsigned max_index,
unsigned prim, unsigned start,
unsigned count,
unsigned start_instance,
unsigned instance_count)
{
SVGA3dPrimitiveRange range;
unsigned hw_prim;
unsigned hw_count;
unsigned index_offset = start * index_size;
hw_prim = svga_translate_prim(prim, count, &hw_count);
if (hw_count == 0)
return PIPE_OK; /* nothing to draw */
range.primType = hw_prim;
range.primitiveCount = hw_count;
range.indexArray.offset = index_offset;
range.indexArray.stride = index_size;
range.indexWidth = index_size;
range.indexBias = index_bias;
return svga_hwtnl_prim(hwtnl, &range, count,
min_index, max_index, index_buffer,
start_instance, instance_count);
}
static enum pipe_error
simple_draw_arrays( struct svga_hwtnl *hwtnl,
unsigned prim, unsigned start, unsigned count )
{
SVGA3dPrimitiveRange range;
unsigned hw_prim;
unsigned hw_count;
hw_prim = svga_translate_prim(prim, count, &hw_count);
if (hw_count == 0)
return PIPE_ERROR_BAD_INPUT;
range.primType = hw_prim;
range.primitiveCount = hw_count;
range.indexArray.surfaceId = SVGA3D_INVALID_ID;
range.indexArray.offset = 0;
range.indexArray.stride = 0;
range.indexWidth = 0;
range.indexBias = start;
/* Min/max index should be calculated prior to applying bias, so we
* end up with min_index = 0, max_index = count - 1 and everybody
* looking at those numbers knows to adjust them by
* range.indexBias.
*/
return svga_hwtnl_prim( hwtnl, &range, 0, count - 1, NULL );
}
enum pipe_error
svga_hwtnl_simple_draw_range_elements( struct svga_hwtnl *hwtnl,
struct pipe_resource *index_buffer,
unsigned index_size,
int index_bias,
unsigned min_index,
unsigned max_index,
unsigned prim,
unsigned start,
unsigned count )
{
struct pipe_resource *upload_buffer = NULL;
SVGA3dPrimitiveRange range;
unsigned hw_prim;
unsigned hw_count;
unsigned index_offset = start * index_size;
enum pipe_error ret = PIPE_OK;
hw_prim = svga_translate_prim(prim, count, &hw_count);
if (hw_count == 0)
goto done;
if (index_buffer &&
svga_buffer_is_user_buffer(index_buffer))
{
assert( index_buffer->width0 >= index_offset + count * index_size );
ret = u_upload_buffer( hwtnl->upload_ib,
0,
index_offset,
count * index_size,
index_buffer,
&index_offset,
&upload_buffer);
if (ret != PIPE_OK)
goto done;
/* Don't need to worry about refcounting index_buffer as this is
* just a stack variable without a counted reference of its own.
* The caller holds the reference.
*/
index_buffer = upload_buffer;
}
range.primType = hw_prim;
range.primitiveCount = hw_count;
range.indexArray.offset = index_offset;
range.indexArray.stride = index_size;
range.indexWidth = index_size;
range.indexBias = index_bias;
ret = svga_hwtnl_prim( hwtnl, &range, min_index, max_index, index_buffer );
if (ret != PIPE_OK)
goto done;
done:
if (upload_buffer)
pipe_resource_reference( &upload_buffer, NULL );
return ret;
}
