src/gallium/drivers/swr/rasterizer/core/rasterizer.h

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  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
  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 {};