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22 *
23 * @file rasterizer.h
24 *
25 * @brief Definitions for the rasterizer.
26 *
27 ******************************************************************************/
28 #pragma once
29
30 #include "context.h"
31 #include <type_traits>
32 #include "conservativeRast.h"
33 #include "multisample.h"
34
35 void RasterizeLine(DRAW_CONTEXT *pDC, uint32_t workerId, uint32_t macroTile, void *pData);
36 void RasterizeSimplePoint(DRAW_CONTEXT *pDC, uint32_t workerId, uint32_t macroTile, void *pData);
37 void RasterizeTriPoint(DRAW_CONTEXT *pDC, uint32_t workerId, uint32_t macroTile, void *pData);
38 void InitRasterizerFunctions();
39
40 INLINE
fpToFixedPoint(const __m128 vIn)41 __m128i fpToFixedPoint(const __m128 vIn)
42 {
43 __m128 vFixed = _mm_mul_ps(vIn, _mm_set1_ps(FIXED_POINT_SCALE));
44 return _mm_cvtps_epi32(vFixed);
45 }
46
47 enum TriEdgesStates
48 {
49 STATE_NO_VALID_EDGES = 0,
50 STATE_E0_E1_VALID,
51 STATE_E0_E2_VALID,
52 STATE_E1_E2_VALID,
53 STATE_ALL_EDGES_VALID,
54 STATE_VALID_TRI_EDGE_COUNT,
55 };
56
57 enum TriEdgesValues
58 {
59 NO_VALID_EDGES = 0,
60 E0_E1_VALID = 0x3,
61 E0_E2_VALID = 0x5,
62 E1_E2_VALID = 0x6,
63 ALL_EDGES_VALID = 0x7,
64 VALID_TRI_EDGE_COUNT,
65 };
66
67 // Selector for correct templated RasterizeTriangle function
68 PFN_WORK_FUNC GetRasterizerFunc(
69 SWR_MULTISAMPLE_COUNT numSamples,
70 bool IsCenter,
71 bool IsConservative,
72 SWR_INPUT_COVERAGE InputCoverage,
73 uint32_t EdgeEnable,
74 bool RasterizeScissorEdges);
75
76 //////////////////////////////////////////////////////////////////////////
77 /// @brief ValidTriEdges convenience typedefs used for templated function
78 /// specialization supported Fixed Point precisions
79 typedef std::integral_constant<uint32_t, ALL_EDGES_VALID> AllEdgesValidT;
80 typedef std::integral_constant<uint32_t, E0_E1_VALID> E0E1ValidT;
81 typedef std::integral_constant<uint32_t, E0_E2_VALID> E0E2ValidT;
82 typedef std::integral_constant<uint32_t, E1_E2_VALID> E1E2ValidT;
83 typedef std::integral_constant<uint32_t, NO_VALID_EDGES> NoEdgesValidT;
84
85 typedef std::integral_constant<uint32_t, STATE_ALL_EDGES_VALID> StateAllEdgesValidT;
86 typedef std::integral_constant<uint32_t, STATE_E0_E1_VALID> StateE0E1ValidT;
87 typedef std::integral_constant<uint32_t, STATE_E0_E2_VALID> StateE0E2ValidT;
88 typedef std::integral_constant<uint32_t, STATE_E1_E2_VALID> StateE1E2ValidT;
89 typedef std::integral_constant<uint32_t, STATE_NO_VALID_EDGES> StateNoEdgesValidT;
90
91 // some specializations to convert from edge state to edge bitmask values
92 template <typename EdgeMask>
93 struct EdgeMaskVal
94 {
95 static_assert(EdgeMask::value > STATE_ALL_EDGES_VALID, "Primary EdgeMaskVal shouldn't be instantiated");
96 };
97
98 template <>
99 struct EdgeMaskVal<StateAllEdgesValidT>
100 {
101 typedef AllEdgesValidT T;
102 };
103
104 template <>
105 struct EdgeMaskVal<StateE0E1ValidT>
106 {
107 typedef E0E1ValidT T;
108 };
109
110 template <>
111 struct EdgeMaskVal<StateE0E2ValidT>
112 {
113 typedef E0E2ValidT T;
114 };
115
116 template <>
117 struct EdgeMaskVal<StateE1E2ValidT>
118 {
119 typedef E1E2ValidT T;
120 };
121
122 template <>
123 struct EdgeMaskVal<StateNoEdgesValidT>
124 {
125 typedef NoEdgesValidT T;
126 };
127
128 INLINE uint32_t EdgeValToEdgeState(uint32_t val)
129 {
130 SWR_ASSERT(val < VALID_TRI_EDGE_COUNT, "Unexpected tri edge mask");
131 static const uint32_t edgeValToEdgeState[VALID_TRI_EDGE_COUNT] = { 0, 0, 0, 1, 0, 2, 3, 4 };
132 return edgeValToEdgeState[val];
133 }
134
135 //////////////////////////////////////////////////////////////////////////
136 /// @struct RasterScissorEdgesT
137 /// @brief Primary RasterScissorEdgesT templated struct that holds compile
138 /// time information about the number of edges needed to be rasterized,
139 /// If either the scissor rect or conservative rast is enabled,
140 /// the scissor test is enabled and the rasterizer will test
141 /// 3 triangle edges + 4 scissor edges for coverage.
142 /// @tparam RasterScissorEdgesT: number of multisamples
143 /// @tparam ConservativeT: is this a conservative rasterization
144 /// @tparam EdgeMaskT: Which edges are valid(not degenerate)
145 template <typename RasterScissorEdgesT, typename ConservativeT, typename EdgeMaskT>
146 struct RasterEdgeTraits
147 {
148 typedef std::true_type RasterizeScissorEdgesT;
149 typedef std::integral_constant<uint32_t, 7> NumEdgesT;
150 //typedef std::integral_constant<uint32_t, EdgeMaskT::value> ValidEdgeMaskT;
151 typedef typename EdgeMaskVal<EdgeMaskT>::T ValidEdgeMaskT;
152 };
153
154 //////////////////////////////////////////////////////////////////////////
155 /// @brief specialization of RasterEdgeTraits. If neither scissor rect
156 /// nor conservative rast is enabled, only test 3 triangle edges
157 /// for coverage
158 template <typename EdgeMaskT>
159 struct RasterEdgeTraits<std::false_type, std::false_type, EdgeMaskT>
160 {
161 typedef std::false_type RasterizeScissorEdgesT;
162 typedef std::integral_constant<uint32_t, 3> NumEdgesT;
163 // no need for degenerate edge masking in non-conservative case; rasterize all triangle edges
164 typedef std::integral_constant<uint32_t, ALL_EDGES_VALID> ValidEdgeMaskT;
165 };
166
167 //////////////////////////////////////////////////////////////////////////
168 /// @struct RasterizerTraits
169 /// @brief templated struct that holds compile time information used
170 /// during rasterization. Inherits EdgeTraits and ConservativeRastBETraits.
171 /// @tparam NumSamplesT: number of multisamples
172 /// @tparam ConservativeT: is this a conservative rasterization
173 /// @tparam InputCoverageT: what type of input coverage is the PS expecting?
174 /// (only used with conservative rasterization)
175 /// @tparam RasterScissorEdgesT: do we need to rasterize with a scissor?
176 template <typename NumSamplesT, typename CenterPatternT, typename ConservativeT, typename InputCoverageT, typename EdgeEnableT, typename RasterScissorEdgesT>
177 struct _RasterizerTraits : public ConservativeRastBETraits<ConservativeT, InputCoverageT>,
178 public RasterEdgeTraits<RasterScissorEdgesT, ConservativeT, EdgeEnableT>
179 {
180 typedef MultisampleTraits<static_cast<SWR_MULTISAMPLE_COUNT>(NumSamplesT::value), CenterPatternT::value> MT;
181
182 /// Fixed point precision the rasterizer is using
183 typedef FixedPointTraits<Fixed_16_8> PrecisionT;
184 /// Fixed point precision of the edge tests used during rasterization
185 typedef FixedPointTraits<Fixed_X_16> EdgePrecisionT;
186
187 // If conservative rast or MSAA center pattern is enabled, only need a single sample coverage test, with the result copied to all samples
188 typedef std::integral_constant<int, ConservativeT::value ? 1 : MT::numCoverageSamples> NumCoverageSamplesT;
189
190 static_assert(EdgePrecisionT::BitsT::value >= ConservativeRastBETraits<ConservativeT, InputCoverageT>::ConservativePrecisionT::BitsT::value,
191 "Rasterizer edge fixed point precision < required conservative rast precision");
192
193 /// constants used to offset between different types of raster tiles
194 static const int colorRasterTileStep{(KNOB_TILE_X_DIM * KNOB_TILE_Y_DIM * (FormatTraits<KNOB_COLOR_HOT_TILE_FORMAT>::bpp / 8)) * MT::numSamples};
195 static const int depthRasterTileStep{(KNOB_TILE_X_DIM * KNOB_TILE_Y_DIM * (FormatTraits<KNOB_DEPTH_HOT_TILE_FORMAT>::bpp / 8)) * MT::numSamples};
196 static const int stencilRasterTileStep{(KNOB_TILE_X_DIM * KNOB_TILE_Y_DIM * (FormatTraits<KNOB_STENCIL_HOT_TILE_FORMAT>::bpp / 8)) * MT::numSamples};
197 static const int colorRasterTileRowStep{(KNOB_MACROTILE_X_DIM / KNOB_TILE_X_DIM) * colorRasterTileStep};
198 static const int depthRasterTileRowStep{(KNOB_MACROTILE_X_DIM / KNOB_TILE_X_DIM)* depthRasterTileStep};
199 static const int stencilRasterTileRowStep{(KNOB_MACROTILE_X_DIM / KNOB_TILE_X_DIM) * stencilRasterTileStep};
200 };
201
202 template <uint32_t NumSamplesT, uint32_t CenterPatternT, uint32_t ConservativeT, uint32_t InputCoverageT, uint32_t EdgeEnableT, uint32_t RasterScissorEdgesT>
203 struct RasterizerTraits final : public _RasterizerTraits <
204 std::integral_constant<uint32_t, NumSamplesT>,
205 std::integral_constant<bool, CenterPatternT != 0>,
206 std::integral_constant<bool, ConservativeT != 0>,
207 std::integral_constant<uint32_t, InputCoverageT>,
208 std::integral_constant<uint32_t, EdgeEnableT>,
209 std::integral_constant<bool, RasterScissorEdgesT != 0> >
210 {};
211