1#ifndef _RRFRAGMENTPACKET_HPP
2#define _RRFRAGMENTPACKET_HPP
3/*-------------------------------------------------------------------------
4 * drawElements Quality Program Reference Renderer
5 * -----------------------------------------------
6 *
7 * Copyright 2014 The Android Open Source Project
8 *
9 * Licensed under the Apache License, Version 2.0 (the "License");
10 * you may not use this file except in compliance with the License.
11 * You may obtain a copy of the License at
12 *
13 *      http://www.apache.org/licenses/LICENSE-2.0
14 *
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
20 *
21 *//*!
22 * \file
23 * \brief Fragment packet
24 *//*--------------------------------------------------------------------*/
25
26#include "rrDefs.hpp"
27#include "rrGenericVector.hpp"
28
29namespace rr
30{
31
32enum
33{
34	NUM_FRAGMENTS_PER_PACKET	= 4
35};
36
37/*--------------------------------------------------------------------*//*!
38 * \brief Fragment packet
39 *
40 * Fragment packet contains inputs and outputs for fragment shading.
41 *
42 * Fragment shading is always done in 2x2 blocks in order to easily estimate
43 * derivates for mipmap-selection etc.
44 *
45 * Values packed in vectors (such as barycentrics) are in order:
46 *  (x0,y0), (x1,y0), (x0,y1), (x1,y1)
47 * OR:
48 *  ndx = y*2 + x
49 *//*--------------------------------------------------------------------*/
50struct FragmentPacket
51{
52	tcu::IVec2		position;			//!< Position of (0,0) fragment.
53	deUint64		coverage;			//!< Coverage mask.
54	tcu::Vec4		barycentric[3];		//!< Perspective-correct barycentric values.
55};
56
57} // rr
58
59#endif // _RRFRAGMENTPACKET_HPP
60