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                        int backBuffer,
  30                        int 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                                     unsigned int vertexCount,
  66                                     const void* indexList,
  67                                     unsigned int 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         unsigned int *index = (unsigned int*)indexList + i;
  96         if (iType == irr_video_EIT_16BIT)
  97           {
  98             ((irr::u16*)irrIndexList)[i] = *index;
  99           }
 100         else
 101           {
 102             ((irr::u32*)irrIndexList)[i] = *index;
 103           }
 104       }
 105
 106     ((irr::video::IVideoDriver*)driver)
 107       ->drawVertexPrimitiveList(&irrVertices[0], vertexCount,
 108                                 irrIndexList, primCount,
 109                                 (irr::video::E_VERTEX_TYPE)vType,
 110                                 (irr::scene::E_PRIMITIVE_TYPE)pType,
 111                                 (irr::video::E_INDEX_TYPE)iType);
 112
 113     free(irrIndexList);
 114   }
 115
 116   int
 117   irr_video_endScene(irr_video_IVideoDriver* driver)
 118   {
 119     return ((irr::video::IVideoDriver*)driver)->endScene();
 120   }
 121
 122   int
 123   irr_video_getFPS(irr_video_IVideoDriver* driver)
 124   {
 125     return ((irr::video::IVideoDriver*)driver)->getFPS();
 126   }
 127
 128   const char*
 129   irr_video_getName(irr_video_IVideoDriver* driver)
 130   {
 131     const wchar_t *wname = ((irr::video::IVideoDriver*)driver)->getName();
 132     size_t nbytes = wcslen(wname) + 1;
 133     char *name = (char*)malloc(nbytes);
 134     wcstombs(name, wname, nbytes);
 135     return name;
 136   }
 137
 138   irr_video_ITexture*
 139   irr_video_getTexture(irr_video_IVideoDriver* driver,
 140                        const char* filename)
 141   {
 142     return (irr_video_ITexture*)
 143       ((irr::video::IVideoDriver*)driver)->getTexture(filename);
 144   }
 145
 146   void
 147   irr_video_setMaterial(irr_video_IVideoDriver* driver,
 148                         const irr_video_SMaterial material)
 149   {
 150     irr::video::SMaterial irrMaterial = irr::video::SMaterial();
 151     irrMaterial.Lighting = material.lighting;
 152     irrMaterial.Wireframe = material.wireframe;
 153
 154     ((irr::video::IVideoDriver*)driver)->setMaterial(irrMaterial);
 155   }
 156
 157   void
 158   irr_video_setTransform(irr_video_IVideoDriver* driver,
 159                          irr_video_E_TRANSFORMATION_STATE state,
 160                          irr_core_matrix4* mat)
 161   {
 162     ((irr::video::IVideoDriver*)driver)
 163       ->setTransform((irr::video::E_TRANSFORMATION_STATE)state,
 164                      *(irr::core::matrix4*)mat);
 165   }
 166 }