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

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  23 * @file tessellator.h
  24 *
  25 * @brief Tessellator fixed function unit interface definition
  26 *
  27 ******************************************************************************/
  28 #pragma once
  29
  30 /// Allocate and initialize a new tessellation context
  31 HANDLE SWR_API TSInitCtx(
  32     SWR_TS_DOMAIN tsDomain,                     ///< [IN] Tessellation domain (isoline, quad, triangle)
  33     SWR_TS_PARTITIONING tsPartitioning,         ///< [IN] Tessellation partitioning algorithm
  34     SWR_TS_OUTPUT_TOPOLOGY tsOutputTopology,    ///< [IN] Tessellation output topology
  35     void* pContextMem,                          ///< [IN] Memory to use for the context
  36     size_t& memSize);                           ///< [INOUT] In: Amount of memory in pContextMem. Out: Mem required
  37
  38 /// Destroy & de-allocate tessellation context
  39 void SWR_API TSDestroyCtx(
  40     HANDLE tsCtx);  ///< [IN] Tessellation context to be destroyed
  41
  42 struct SWR_TS_TESSELLATED_DATA
  43 {
  44     uint32_t NumPrimitives;
  45     uint32_t NumDomainPoints;
  46
  47     uint32_t* ppIndices[3];
  48     float* pDomainPointsU;
  49     float* pDomainPointsV;
  50     // For Tri: pDomainPointsW[i] = 1.0f - pDomainPointsU[i] - pDomainPointsV[i]
  51 };
  52
  53 /// Perform Tessellation
  54 void SWR_API TSTessellate(
  55     HANDLE tsCtx,                                   ///< [IN] Tessellation Context
  56     const SWR_TESSELLATION_FACTORS& tsTessFactors,  ///< [IN] Tessellation Factors
  57     SWR_TS_TESSELLATED_DATA& tsTessellatedData);    ///< [OUT] Tessellated Data
  58
  59
  60
  61 /// @TODO - Implement OSS tessellator
  62
  63 INLINE HANDLE SWR_API TSInitCtx(
  64     SWR_TS_DOMAIN tsDomain,
  65     SWR_TS_PARTITIONING tsPartitioning,
  66     SWR_TS_OUTPUT_TOPOLOGY tsOutputTopology,
  67     void* pContextMem,
  68     size_t& memSize)
  69 {
  70     SWR_NOT_IMPL;
  71     return NULL;
  72 }
  73
  74
  75 INLINE void SWR_API TSDestroyCtx(HANDLE tsCtx)
  76 {
  77     SWR_NOT_IMPL;
  78 }
  79
  80
  81 INLINE void SWR_API TSTessellate(
  82     HANDLE tsCtx,
  83     const SWR_TESSELLATION_FACTORS& tsTessFactors,
  84     SWR_TS_TESSELLATED_DATA& tsTessellatedData)
  85 {
  86     SWR_NOT_IMPL;
  87 }
  88