src/IVideoDriver.cpp

   1 /* c-irrlicht --- C bindings for Irrlicht Engine
   2
   3    Copyright (C) 2019 Javier Sancho <jsf@jsancho.org>
   4
   5    This file is part of c-irrlicht.
   6
   7    c-irrlicht is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU Lesser General Public License as
   9    published by the Free Software Foundation; either version 3 of the
  10    License, or (at your option) any later version.
  11
  12    c-irrlicht is distributed in the hope that it will be useful, but
  13    WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with guile-irrlicht.  If not, see
  19    <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include <irrlicht/irrlicht.h>
  23 #include <wchar.h>
  24 #include "IVideoDriver.h"
  25
  26 extern "C" {
  27   int
  28   irr_video_beginScene(irr_video_IVideoDriver* driver,
  29                        bool backBuffer,
  30                        bool zBuffer,
  31                        const irr_video_SColor* color,
  32                        irr_video_SExposedVideoData* videoData,
  33                        const irr_core_rect_s32* sourceRect)
  34   {
  35     // Color
  36     irr::video::SColor col = irr::video::SColor(color->a, color->r,
  37                                                 color->g, color->b);
  38
  39     // Video data
  40     // TODO
  41     irr::video::SExposedVideoData vdata = irr::video::SExposedVideoData();
  42
  43     // Source rect
  44     irr::core::rect<irr::s32> rect;
  45     if (sourceRect != NULL)
  46       {
  47         rect = irr::core::rect<irr::s32>(sourceRect->x,
  48                                          sourceRect->y,
  49                                          sourceRect->x2,
  50                                          sourceRect->y2);
  51       }
  52
  53     // Begin scene
  54     return ((irr::video::IVideoDriver*)driver)
  55       ->beginScene(backBuffer,
  56                    zBuffer,
  57                    col,
  58                    vdata,
  59                    sourceRect != NULL ? &rect : 0);
  60   }
  61
  62   void
  63   irr_video_drawVertexPrimitiveList(irr_video_IVideoDriver* driver,
  64                                     const void* vertices,
  65                                     uint32_t vertexCount,
  66                                     const void* indexList,
  67                                     uint32_t primCount,
  68                                     irr_video_E_VERTEX_TYPE vType,
  69                                     irr_scene_E_PRIMITIVE_TYPE pType,
  70                                     irr_video_E_INDEX_TYPE iType)
  71   {
  72     // Convert vertices
  73     irr::video::S3DVertex irrVertices[vertexCount];
  74     for (int i=0; i<vertexCount; i++)
  75       {
  76         irr_video_S3DVertex *vertex = (irr_video_S3DVertex*)vertices + i;
  77         irrVertices[i] =
  78           irr::video::S3DVertex(vertex->pos.x, vertex->pos.y, vertex->pos.z,
  79                                 vertex->normal.x, vertex->normal.y, vertex->normal.z,
  80                                 irr::video::SColor(vertex->color.a,
  81                                                    vertex->color.r,
  82                                                    vertex->color.g,
  83                                                    vertex->color.b),
  84                                 vertex->tCoords.x, vertex->tCoords.y);
  85       }
  86
  87     // Convert indices
  88     size_t indexListSize =
  89       ((iType == irr_video_EIT_16BIT) ? sizeof(irr::u16) : sizeof(irr::u32)) *
  90       primCount * 3;
  91     void* irrIndexList = malloc(indexListSize);
  92
  93     for (int i=0; i<primCount*3; i++)
  94       {
  95         if (iType == irr_video_EIT_16BIT)
  96           {
  97             uint16_t *index = (uint16_t*)indexList + i;
  98             ((irr::u16*)irrIndexList)[i] = *index;
  99           }
 100         else
 101           {
 102             uint32_t *index = (uint32_t*)indexList + i;
 103             ((irr::u32*)irrIndexList)[i] = *index;
 104           }
 105       }
 106
 107     ((irr::video::IVideoDriver*)driver)
 108       ->drawVertexPrimitiveList(&irrVertices[0], vertexCount,
 109                                 irrIndexList, primCount,
 110                                 (irr::video::E_VERTEX_TYPE)vType,
 111                                 (irr::scene::E_PRIMITIVE_TYPE)pType,
 112                                 (irr::video::E_INDEX_TYPE)iType);
 113
 114     free(irrIndexList);
 115   }
 116
 117   int
 118   irr_video_endScene(irr_video_IVideoDriver* driver)
 119   {
 120     return ((irr::video::IVideoDriver*)driver)->endScene();
 121   }
 122
 123   int
 124   irr_video_getFPS(irr_video_IVideoDriver* driver)
 125   {
 126     return ((irr::video::IVideoDriver*)driver)->getFPS();
 127   }
 128
 129   const char*
 130   irr_video_getName(irr_video_IVideoDriver* driver)
 131   {
 132     const wchar_t *wname = ((irr::video::IVideoDriver*)driver)->getName();
 133     size_t nbytes = wcslen(wname) + 1;
 134     char *name = (char*)malloc(nbytes);
 135     wcstombs(name, wname, nbytes);
 136     return name;
 137   }
 138
 139   irr_video_ITexture*
 140   irr_video_getTexture(irr_video_IVideoDriver* driver,
 141                        const char* filename)
 142   {
 143     return (irr_video_ITexture*)
 144       ((irr::video::IVideoDriver*)driver)->getTexture(filename);
 145   }
 146
 147   void
 148   irr_video_setMaterial(irr_video_IVideoDriver* driver,
 149                         irr_video_SMaterial* material)
 150   {
 151     ((irr::video::IVideoDriver*)driver)->setMaterial(*(irr::video::SMaterial*)material);
 152   }
 153
 154   void
 155   irr_video_setTransform(irr_video_IVideoDriver* driver,
 156                          irr_video_E_TRANSFORMATION_STATE state,
 157                          irr_core_matrix4* mat)
 158   {
 159     ((irr::video::IVideoDriver*)driver)
 160       ->setTransform((irr::video::E_TRANSFORMATION_STATE)state,
 161                      *(irr::core::matrix4*)mat);
 162   }
 163 }