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
  25 #include "color.h"
  26 #include "gsubr.h"
  27 #include "gui-environment.h"
  28 #include "material.h"
  29 #include "matrix4.h"
  30 #include "primitive-types.h"
  31 #include "rect.h"
  32 #include "scene-manager.h"
  33 #include "texture.h"
  34 #include "vertex3d.h"
  35 #include "video-driver.h"
  36 #include "wrapped.h"
  37
  38 extern "C" {
  39
  40   void
  41   init_video_driver (void)
  42   {
  43     init_video_driver_type ();
  44     DEFINE_GSUBR ("begin-scene", 1, 0, 1, irr_video_beginScene);
  45     DEFINE_GSUBR ("draw-vertex-primitive-list", 3, 0, 1, irr_video_drawVertexPrimitiveList);
  46     DEFINE_GSUBR ("end-scene", 1, 0, 0, irr_video_endScene);
  47     DEFINE_GSUBR ("get-fps", 1, 0, 0, irr_video_getFPS);
  48     DEFINE_GSUBR ("get-texture", 2, 0, 0, irr_video_getTexture);
  49     DEFINE_GSUBR ("set-transform!", 3, 0, 0, irr_video_setTransform);
  50   }
  51
  52   DEFINE_WRAPPED_TYPE (irr::video::IVideoDriver*, "video-driver",
  53                        init_video_driver_type, video_driver_p,
  54                        wrap_video_driver, unwrap_video_driver);
  55
  56   SCM
  57   irr_video_beginScene (SCM wrapped_video_driver,
  58                         SCM rest)
  59   {
  60     SCM back_buffer = SCM_BOOL_T;
  61     SCM z_buffer = SCM_BOOL_T;
  62     SCM color = scm_list_4 (scm_from_uint32 (255),
  63                             scm_from_uint32 (0),
  64                             scm_from_uint32 (0),
  65                             scm_from_uint32 (0));
  66     SCM video_data = SCM_BOOL_F;
  67     SCM source_rect = SCM_UNDEFINED;
  68
  69     scm_c_bind_keyword_arguments ("begin-scene", rest, (scm_t_keyword_arguments_flags)0,
  70                                   scm_from_utf8_keyword ("back-buffer"), &back_buffer,
  71                                   scm_from_utf8_keyword ("z-buffer"), &z_buffer,
  72                                   scm_from_utf8_keyword ("color"), &color,
  73                                   scm_from_utf8_keyword ("video-data"), &video_data,
  74                                   scm_from_utf8_keyword ("source-rect"), &source_rect,
  75                                   SCM_UNDEFINED);
  76
  77     irr::video::IVideoDriver* driver = unwrap_video_driver (wrapped_video_driver);
  78     irr::core::rect<irr::s32>* sourceRectAddress = 0;
  79     if (source_rect != SCM_UNDEFINED)
  80       {
  81         irr::core::rect<irr::s32> sourceRect = scm_to_rect_s32 (source_rect);
  82         sourceRectAddress = &sourceRect;
  83       }
  84     return scm_from_bool (driver->beginScene (scm_to_bool (back_buffer),
  85                                               scm_to_bool (z_buffer),
  86                                               scm_to_color (color),
  87                                               irr::video::SExposedVideoData (),
  88                                               sourceRectAddress));
  89   }
  90
  91   SCM
  92   irr_video_drawVertexPrimitiveList (SCM wrapped_video_driver,
  93                                      SCM vertices,
  94                                      SCM indices,
  95                                      SCM rest)
  96   {
  97     SCM v_type = scm_from_utf8_symbol ("standard");
  98     SCM p_type = scm_from_utf8_symbol ("triangles");
  99
 100     scm_c_bind_keyword_arguments ("draw-vertex-primitive-list", rest, (scm_t_keyword_arguments_flags)0,
 101                                   scm_from_utf8_keyword ("vertex-type"), &v_type,
 102                                   scm_from_utf8_keyword ("primitive-type"), &p_type,
 103                                   SCM_UNDEFINED);
 104
 105     // Build vertex array
 106     irr::u32 vertex_count = scm_to_uint32 (scm_length (vertices));
 107     irr::video::S3DVertex s3d_vertices [vertex_count];
 108     for (int i = 0; i < vertex_count; i++)
 109       {
 110         irr::video::S3DVertex* vertex = unwrap_vertex3d (scm_list_ref (vertices, scm_from_int (i)));
 111         s3d_vertices[i] = irr::video::S3DVertex (vertex->Pos,
 112                                                  vertex->Normal,
 113                                                  vertex->Color,
 114                                                  vertex->TCoords);
 115       }
 116
 117     // Build index array
 118     irr::u32 index_count = scm_to_uint32 (scm_length (indices));
 119     SCM flat_indices = scm_apply_0 (scm_eval_string (scm_from_utf8_string ("append")),
 120                                     indices);
 121     int flat_length = scm_to_int (scm_length (flat_indices));
 122     irr::u32 c_indices [flat_length];
 123     for (int i = 0; i < flat_length; i++)
 124       {
 125         c_indices[i] = scm_to_uint32 (scm_list_ref (flat_indices, scm_from_int (i)));
 126       }
 127
 128     // Draw vertices
 129     irr::video::IVideoDriver* driver = unwrap_video_driver (wrapped_video_driver);
 130     driver->drawVertexPrimitiveList (&s3d_vertices[0],
 131                                      vertex_count,
 132                                      &c_indices[0],
 133                                      index_count,
 134                                      scm_to_vertex_type (v_type),
 135                                      scm_to_primitive_type (p_type),
 136                                      irr::video::EIT_32BIT);
 137     return SCM_UNSPECIFIED;
 138   }
 139
 140   SCM
 141   irr_video_endScene (SCM wrapped_video_driver)
 142   {
 143     irr::video::IVideoDriver* driver = unwrap_video_driver (wrapped_video_driver);
 144     return scm_from_bool (driver->endScene ());
 145   }
 146
 147   SCM
 148   irr_video_getFPS (SCM wrapped_video_driver)
 149   {
 150     irr::video::IVideoDriver* driver = unwrap_video_driver (wrapped_video_driver);
 151     return scm_from_int32 (driver->getFPS ());
 152   }
 153
 154   SCM
 155   irr_video_getTexture (SCM wrapped_video_driver,
 156                         SCM filename)
 157   {
 158     irr::video::IVideoDriver* driver = unwrap_video_driver (wrapped_video_driver);
 159     irr::video::ITexture* texture = driver->getTexture (scm_to_utf8_stringn (filename, NULL));
 160     return wrap_texture (texture);
 161   }
 162
 163   SCM
 164   irr_video_setMaterial (SCM wrapped_video_driver,
 165                          SCM material)
 166   {
 167     irr::video::IVideoDriver* driver = unwrap_video_driver (wrapped_video_driver);
 168     driver->setMaterial (*(unwrap_material (material)));
 169     return SCM_UNSPECIFIED;
 170   }
 171
 172   SCM
 173   irr_video_setTransform (SCM wrapped_video_driver,
 174                           SCM state,
 175                           SCM mat)
 176   {
 177     irr::video::IVideoDriver* driver = unwrap_video_driver (wrapped_video_driver);
 178     driver->setTransform (scm_to_transformation_state (state),
 179                           scm_to_matrix4 (mat));
 180     return SCM_UNSPECIFIED;
 181   }
 182
 183   irr::video::E_TRANSFORMATION_STATE
 184   scm_to_transformation_state (SCM transformation_state)
 185   {
 186     char* state = scm_to_utf8_stringn (scm_symbol_to_string (transformation_state), NULL);
 187     if (!strcmp (state, "view"))
 188       {
 189         return irr::video::ETS_VIEW;
 190       }
 191     else if (!strcmp (state, "world"))
 192       {
 193         return irr::video::ETS_WORLD;
 194       }
 195     else if (!strcmp (state, "projection"))
 196       {
 197         return irr::video::ETS_PROJECTION;
 198       }
 199     else if (!strcmp (state, "texture0"))
 200       {
 201         return irr::video::ETS_TEXTURE_0;
 202       }
 203     else if (!strcmp (state, "texture1"))
 204       {
 205         return irr::video::ETS_TEXTURE_1;
 206       }
 207     else if (!strcmp (state, "texture2"))
 208       {
 209         return irr::video::ETS_TEXTURE_2;
 210       }
 211     else if (!strcmp (state, "texture3"))
 212       {
 213         return irr::video::ETS_TEXTURE_3;
 214       }
 215     else
 216       {
 217         scm_error (scm_arg_type_key, NULL, "Wrong transformation state: ~S",
 218                    scm_list_1 (transformation_state), scm_list_1 (transformation_state));
 219       }
 220   }
 221
 222 }