src/video-driver.cpp

   1 /* guile-irrlicht --- GNU Guile bindings for Irrlicht Engine
   2
   3    Copyright (C) 2020 Javier Sancho <jsf@jsancho.org>
   4
   5    This file is part of guile-irrlicht.
   6
   7    guile-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    guile-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 <libguile.h>
  24 #include "color.h"
  25 #include "gsubr.h"
  26 #include "matrix4.h"
  27 #include "primitive-types.h"
  28 #include "rect.h"
  29 #include "video-driver.h"
  30
  31
  32 using namespace irr;
  33
  34
  35 SCM
  36 video_IVideoDriver_beginScene (SCM video_driver,
  37                                SCM back_buffer,
  38                                SCM z_buffer,
  39                                SCM color,
  40                                SCM video_data,
  41                                SCM source_rect)
  42 {
  43   video::IVideoDriver* driver = (video::IVideoDriver*) scm_to_pointer (video_driver);
  44
  45   // Source rect
  46   core::rect<s32>* sourceRectAddress = 0;
  47   if (!scm_is_false (source_rect))
  48     {
  49       core::rect<s32> sourceRect = scm_to_rect_s32 (source_rect);
  50       sourceRectAddress = &sourceRect;
  51     }
  52
  53   return scm_from_bool (driver->beginScene (scm_to_bool (back_buffer),
  54                                             scm_to_bool (z_buffer),
  55                                             scm_to_color (color),
  56                                             video::SExposedVideoData (),
  57                                             sourceRectAddress));
  58 }
  59
  60
  61 SCM
  62 video_IVideoDriver_drawVertexPrimitiveList (SCM video_driver,
  63                                             SCM vertices,
  64                                             SCM indices,
  65                                             SCM v_type,
  66                                             SCM p_type)
  67 {
  68   // Build vertex array
  69   u32 vertex_count = scm_to_uint32 (scm_length (vertices));
  70   video::S3DVertex s3d_vertices [vertex_count];
  71   for (int i = 0; i < vertex_count; i++)
  72     {
  73       video::S3DVertex* vertex =
  74         (video::S3DVertex*) scm_to_pointer (scm_list_ref (vertices, scm_from_int (i)));
  75       s3d_vertices[i] = video::S3DVertex (vertex->Pos,
  76                                           vertex->Normal,
  77                                           vertex->Color,
  78                                           vertex->TCoords);
  79     }
  80
  81   // Build index array
  82   u32 index_count = scm_to_uint32 (scm_length (indices));
  83   SCM flat_indices = scm_apply_0 (scm_eval_string (scm_from_utf8_string ("append")),
  84                                   indices);
  85   int flat_length = scm_to_int (scm_length (flat_indices));
  86   u32 c_indices [flat_length];
  87   for (int i = 0; i < flat_length; i++)
  88     {
  89       c_indices[i] = scm_to_uint32 (scm_list_ref (flat_indices, scm_from_int (i)));
  90     }
  91
  92   // Draw vertices
  93   video::IVideoDriver* driver = (video::IVideoDriver*) scm_to_pointer (video_driver);
  94   driver->drawVertexPrimitiveList (&s3d_vertices[0],
  95                                    vertex_count,
  96                                    &c_indices[0],
  97                                    index_count,
  98                                    scm_to_vertex_type (v_type),
  99                                    scm_to_primitive_type (p_type),
 100                                    video::EIT_32BIT);
 101   return SCM_UNSPECIFIED;
 102 }
 103
 104
 105 SCM
 106 video_IVideoDriver_endScene (SCM video_driver)
 107 {
 108   video::IVideoDriver* driver = (video::IVideoDriver*) scm_to_pointer (video_driver);
 109   return scm_from_bool (driver->endScene ());
 110 }
 111
 112
 113 SCM
 114 video_IVideoDriver_getFPS (SCM video_driver)
 115 {
 116   video::IVideoDriver* driver = (video::IVideoDriver*) scm_to_pointer (video_driver);
 117   return scm_from_int32 (driver->getFPS ());
 118 }
 119
 120
 121 SCM
 122 video_IVideoDriver_getTexture (SCM video_driver,
 123                                SCM filename)
 124 {
 125   video::IVideoDriver* driver = (video::IVideoDriver*) scm_to_pointer (video_driver);
 126   video::ITexture* texture = driver->getTexture (scm_to_utf8_stringn (filename, NULL));
 127   return scm_from_pointer ((void*) texture, NULL);
 128 }
 129
 130
 131 SCM
 132 video_IVideoDriver_setMaterial (SCM video_driver,
 133                                 SCM material)
 134 {
 135   video::IVideoDriver* driver = (video::IVideoDriver*) scm_to_pointer (video_driver);
 136   driver->setMaterial (*((video::SMaterial*) scm_to_pointer (material)));
 137   return SCM_UNSPECIFIED;
 138 }
 139
 140
 141 SCM
 142 video_IVideoDriver_setTransform (SCM video_driver,
 143                                  SCM state,
 144                                  SCM mat)
 145 {
 146   video::IVideoDriver* driver = (video::IVideoDriver*) scm_to_pointer (video_driver);
 147   driver->setTransform (scm_to_transformation_state (state),
 148                         scm_to_matrix4 (mat));
 149   return SCM_UNSPECIFIED;
 150 }
 151
 152
 153 extern "C" {
 154
 155   void
 156   init_video_driver (void)
 157   {
 158     DEFINE_GSUBR ("video_IVideoDriver_beginScene", 6, 0, 0, video_IVideoDriver_beginScene);
 159     DEFINE_GSUBR ("video_IVideoDriver_drawVertexPrimitiveList", 5, 0, 1,
 160                   video_IVideoDriver_drawVertexPrimitiveList);
 161     DEFINE_GSUBR ("video_IVideoDriver_endScene", 1, 0, 0, video_IVideoDriver_endScene);
 162     DEFINE_GSUBR ("video_IVideoDriver_getFPS", 1, 0, 0, video_IVideoDriver_getFPS);
 163     DEFINE_GSUBR ("video_IVideoDriver_getTexture", 2, 0, 0, video_IVideoDriver_getTexture);
 164     DEFINE_GSUBR ("video_IVideoDriver_setMaterial", 2, 0, 0, video_IVideoDriver_setMaterial);
 165     DEFINE_GSUBR ("video_IVideoDriver_setTransform", 3, 0, 0, video_IVideoDriver_setTransform);
 166   }
 167
 168 }
 169
 170 video::E_TRANSFORMATION_STATE
 171 scm_to_transformation_state (SCM transformation_state)
 172 {
 173   char* state = scm_to_utf8_stringn (scm_symbol_to_string (transformation_state), NULL);
 174   if (!strcmp (state, "view"))
 175     {
 176       return video::ETS_VIEW;
 177     }
 178   else if (!strcmp (state, "world"))
 179     {
 180       return video::ETS_WORLD;
 181     }
 182   else if (!strcmp (state, "projection"))
 183     {
 184       return video::ETS_PROJECTION;
 185     }
 186   else if (!strcmp (state, "texture0"))
 187     {
 188       return video::ETS_TEXTURE_0;
 189     }
 190   else if (!strcmp (state, "texture1"))
 191     {
 192       return video::ETS_TEXTURE_1;
 193     }
 194   else if (!strcmp (state, "texture2"))
 195     {
 196       return video::ETS_TEXTURE_2;
 197     }
 198   else if (!strcmp (state, "texture3"))
 199     {
 200       return video::ETS_TEXTURE_3;
 201     }
 202   else
 203     {
 204       scm_error (scm_arg_type_key, NULL, "Wrong transformation state: ~S",
 205                  scm_list_1 (transformation_state), scm_list_1 (transformation_state));
 206     }
 207 }