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

   1 /****************************************************************************
   2 * Copyright (C) 2014-2015 Intel Corporation.   All Rights Reserved.
   3 *
   4 * Permission is hereby granted, free of charge, to any person obtaining a
   5 * copy of this software and associated documentation files (the "Software"),
   6 * to deal in the Software without restriction, including without limitation
   7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 * and/or sell copies of the Software, and to permit persons to whom the
   9 * Software is furnished to do so, subject to the following conditions:
  10 *
  11 * The above copyright notice and this permission notice (including the next
  12 * paragraph) shall be included in all copies or substantial portions of the
  13 * Software.
  14 *
  15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21 * IN THE SOFTWARE.
  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
  39 INLINE
  40 __m128i fpToFixedPoint(const __m128 vIn)
  41 {
  42     __m128 vFixed = _mm_mul_ps(vIn, _mm_set1_ps(FIXED_POINT_SCALE));
  43     return _mm_cvtps_epi32(vFixed);
  44 }
  45
  46 // Selector for correct templated RasterizeTriangle function
  47 PFN_WORK_FUNC GetRasterizerFunc(
  48     uint32_t numSamples,
  49     bool IsConservative,
  50     uint32_t InputCoverage,
  51     uint32_t EdgeEnable,
  52     bool RasterizeScissorEdges);
  53
  54 enum ValidTriEdges
  55 {
  56     NO_VALID_EDGES = 0,
  57     E0_E1_VALID = 0x3,
  58     E0_E2_VALID = 0x5,
  59     E1_E2_VALID = 0x6,
  60     ALL_EDGES_VALID = 0x7,
  61     VALID_TRI_EDGE_COUNT,
  62 };
  63
  64 //////////////////////////////////////////////////////////////////////////
  65 /// @brief ValidTriEdges convenience typedefs used for templated function
  66 /// specialization supported Fixed Point precisions
  67 typedef std::integral_constant<uint32_t, ALL_EDGES_VALID> AllEdgesValidT;
  68 typedef std::integral_constant<uint32_t, E0_E1_VALID> E0E1ValidT;
  69 typedef std::integral_constant<uint32_t, E0_E2_VALID> E0E2ValidT;
  70 typedef std::integral_constant<uint32_t, E1_E2_VALID> E1E2ValidT;
  71 typedef std::integral_constant<uint32_t, NO_VALID_EDGES> NoEdgesValidT;
  72
  73 //////////////////////////////////////////////////////////////////////////
  74 /// @struct RasterScissorEdgesT
  75 /// @brief Primary RasterScissorEdgesT templated struct that holds compile
  76 /// time information about the number of edges needed to be rasterized,
  77 /// If either the scissor rect or conservative rast is enabled,
  78 /// the scissor test is enabled and the rasterizer will test
  79 /// 3 triangle edges + 4 scissor edges for coverage.
  80 /// @tparam RasterScissorEdgesT: number of multisamples
  81 /// @tparam ConservativeT: is this a conservative rasterization
  82 /// @tparam EdgeMaskT: Which edges are valid(not degenerate)
  83 template <typename RasterScissorEdgesT, typename ConservativeT, typename EdgeMaskT>
  84 struct RasterEdgeTraits
  85 {
  86     typedef std::true_type RasterizeScissorEdgesT;
  87     typedef std::integral_constant<uint32_t, 7> NumEdgesT;
  88     typedef std::integral_constant<uint32_t, EdgeMaskT::value> ValidEdgeMaskT;
  89 };
  90
  91 //////////////////////////////////////////////////////////////////////////
  92 /// @brief specialization of RasterEdgeTraits. If neither scissor rect
  93 /// nor conservative rast is enabled, only test 3 triangle edges
  94 /// for coverage
  95 template <typename EdgeMaskT>
  96 struct RasterEdgeTraits<std::false_type, std::false_type, EdgeMaskT>
  97 {
  98     typedef std::false_type RasterizeScissorEdgesT;
  99     typedef std::integral_constant<uint32_t, 3> NumEdgesT;
 100     // no need for degenerate edge masking in non-conservative case; rasterize all triangle edges
 101     typedef std::integral_constant<uint32_t, ALL_EDGES_VALID> ValidEdgeMaskT;
 102 };
 103
 104 //////////////////////////////////////////////////////////////////////////
 105 /// @struct RasterizerTraits
 106 /// @brief templated struct that holds compile time information used
 107 /// during rasterization. Inherits EdgeTraits and ConservativeRastBETraits.
 108 /// @tparam NumSamplesT: number of multisamples
 109 /// @tparam ConservativeT: is this a conservative rasterization
 110 /// @tparam InputCoverageT: what type of input coverage is the PS expecting?
 111 /// (only used with conservative rasterization)
 112 /// @tparam RasterScissorEdgesT: do we need to rasterize with a scissor?
 113 template <typename NumSamplesT, typename ConservativeT, typename InputCoverageT, typename EdgeEnableT, typename RasterScissorEdgesT>
 114 struct RasterizerTraits final : public ConservativeRastBETraits<ConservativeT, InputCoverageT>,
 115                                 public RasterEdgeTraits<RasterScissorEdgesT, ConservativeT, std::integral_constant<uint32_t, EdgeEnableT::value>>
 116 {
 117     typedef MultisampleTraits<static_cast<SWR_MULTISAMPLE_COUNT>(NumSamplesT::value)> MT;
 118
 119     /// Fixed point precision the rasterizer is using
 120     typedef FixedPointTraits<Fixed_16_8> PrecisionT;
 121     /// Fixed point precision of the edge tests used during rasterization
 122     typedef FixedPointTraits<Fixed_X_16> EdgePrecisionT;
 123
 124     // If conservative rast is enabled, only need a single sample coverage test, with the result copied to all samples
 125     typedef std::integral_constant<int, (ConservativeT::value) ? 1 : MT::numSamples> NumRasterSamplesT;
 126
 127     static_assert(EdgePrecisionT::BitsT::value >=  ConservativeRastBETraits<ConservativeT, InputCoverageT>::ConservativePrecisionT::BitsT::value,
 128                   "Rasterizer edge fixed point precision < required conservative rast precision");
 129
 130     /// constants used to offset between different types of raster tiles
 131     static const int colorRasterTileStep{(KNOB_TILE_X_DIM * KNOB_TILE_Y_DIM * (FormatTraits<KNOB_COLOR_HOT_TILE_FORMAT>::bpp / 8)) * MT::numSamples};
 132     static const int depthRasterTileStep{(KNOB_TILE_X_DIM * KNOB_TILE_Y_DIM * (FormatTraits<KNOB_DEPTH_HOT_TILE_FORMAT>::bpp / 8)) * MT::numSamples};
 133     static const int stencilRasterTileStep{(KNOB_TILE_X_DIM * KNOB_TILE_Y_DIM * (FormatTraits<KNOB_STENCIL_HOT_TILE_FORMAT>::bpp / 8)) * MT::numSamples};
 134     static const int colorRasterTileRowStep{(KNOB_MACROTILE_X_DIM / KNOB_TILE_X_DIM) * colorRasterTileStep};
 135     static const int depthRasterTileRowStep{(KNOB_MACROTILE_X_DIM / KNOB_TILE_X_DIM)* depthRasterTileStep};
 136     static const int stencilRasterTileRowStep{(KNOB_MACROTILE_X_DIM / KNOB_TILE_X_DIM) * stencilRasterTileStep};
 137 };