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 "device.h"
  27 #include "gsubr.h"
  28 #include "gui-environment.h"
  29 #include "material.h"
  30 #include "matrix4.h"
  31 #include "primitive-types.h"
  32 #include "rect.h"
  33 #include "scene-manager.h"
  34 #include "texture.h"
  35 #include "vertex3d.h"
  36 #include "video-driver.h"
  37 #include "wrapped.h"
  38
  39 extern "C" {
  40
  41   void
  42   init_video_driver (void)
  43   {
  44     init_video_driver_type ();
  45     DEFINE_GSUBR ("begin-scene", 1, 0, 1, irr_video_beginScene);
  46     DEFINE_GSUBR ("draw-vertex-primitive-list", 3, 0, 1, irr_video_drawVertexPrimitiveList);
  47     DEFINE_GSUBR ("end-scene", 1, 0, 0, irr_video_endScene);
  48     DEFINE_GSUBR ("get-fps", 1, 0, 0, irr_video_getFPS);
  49     DEFINE_GSUBR ("get-texture", 2, 0, 0, irr_video_getTexture);
  50     DEFINE_GSUBR ("get-video-driver", 1, 0, 0, irr_getVideoDriver);
  51     DEFINE_GSUBR ("set-transform!", 3, 0, 0, irr_video_setTransform);
  52   }
  53
  54   DEFINE_WRAPPED_TYPE (irr::video::IVideoDriver*, "video-driver",
  55                        init_video_driver_type, video_driver_p,
  56                        wrap_video_driver, unwrap_video_driver);
  57
  58   SCM
  59   irr_video_beginScene (SCM wrapped_video_driver,
  60                         SCM rest)
  61   {
  62     SCM back_buffer = SCM_BOOL_T;
  63     SCM z_buffer = SCM_BOOL_T;
  64     SCM color = scm_list_4 (scm_from_uint32 (255),
  65                             scm_from_uint32 (0),
  66                             scm_from_uint32 (0),
  67                             scm_from_uint32 (0));
  68     SCM video_data = SCM_BOOL_F;
  69     SCM source_rect = SCM_UNDEFINED;
  70
  71     scm_c_bind_keyword_arguments ("begin-scene", rest, (scm_t_keyword_arguments_flags)0,
  72                                   scm_from_utf8_keyword ("back-buffer"), &back_buffer,
  73                                   scm_from_utf8_keyword ("z-buffer"), &z_buffer,
  74                                   scm_from_utf8_keyword ("color"), &color,
  75                                   scm_from_utf8_keyword ("video-data"), &video_data,
  76                                   scm_from_utf8_keyword ("source-rect"), &source_rect,
  77                                   SCM_UNDEFINED);
  78
  79     irr::video::IVideoDriver* driver = unwrap_video_driver (wrapped_video_driver);
  80     irr::core::rect<irr::s32>* sourceRectAddress = 0;
  81     if (source_rect != SCM_UNDEFINED)
  82       {
  83         irr::core::rect<irr::s32> sourceRect = scm_to_rect_s32 (source_rect);
  84         sourceRectAddress = &sourceRect;
  85       }
  86     return scm_from_bool (driver->beginScene (scm_to_bool (back_buffer),
  87                                               scm_to_bool (z_buffer),
  88                                               scm_to_color (color),
  89                                               irr::video::SExposedVideoData (),
  90                                               sourceRectAddress));
  91   }
  92
  93   SCM
  94   irr_video_drawVertexPrimitiveList (SCM wrapped_video_driver,
  95                                      SCM vertices,
  96                                      SCM indices,
  97                                      SCM rest)
  98   {
  99     SCM v_type = scm_from_utf8_symbol ("standard");
 100     SCM p_type = scm_from_utf8_symbol ("triangles");
 101
 102     scm_c_bind_keyword_arguments ("draw-vertex-primitive-list", rest, (scm_t_keyword_arguments_flags)0,
 103                                   scm_from_utf8_keyword ("vertex-type"), &v_type,
 104                                   scm_from_utf8_keyword ("primitive-type"), &p_type,
 105                                   SCM_UNDEFINED);
 106
 107     // Build vertex array
 108     irr::u32 vertex_count = scm_to_uint32 (scm_length (vertices));
 109     irr::video::S3DVertex s3d_vertices [vertex_count];
 110     for (int i = 0; i < vertex_count; i++)
 111       {
 112         irr::video::S3DVertex* vertex = unwrap_vertex3d (scm_list_ref (vertices, scm_from_int (i)));
 113         s3d_vertices[i] = irr::video::S3DVertex (vertex->Pos,
 114                                                  vertex->Normal,
 115                                                  vertex->Color,
 116                                                  vertex->TCoords);
 117       }
 118
 119     // Build index array
 120     irr::u32 index_count = scm_to_uint32 (scm_length (indices));
 121     SCM flat_indices = scm_apply_0 (scm_eval_string (scm_from_utf8_string ("append")),
 122                                     indices);
 123     int flat_length = scm_to_int (scm_length (flat_indices));
 124     irr::u32 c_indices [flat_length];
 125     for (int i = 0; i < flat_length; i++)
 126       {
 127         c_indices[i] = scm_to_uint32 (scm_list_ref (flat_indices, scm_from_int (i)));
 128       }
 129
 130     // Draw vertices
 131     irr::video::IVideoDriver* driver = unwrap_video_driver (wrapped_video_driver);
 132     driver->drawVertexPrimitiveList (&s3d_vertices[0],
 133                                      vertex_count,
 134                                      &c_indices[0],
 135                                      index_count,
 136                                      scm_to_vertex_type (v_type),
 137                                      scm_to_primitive_type (p_type),
 138                                      irr::video::EIT_32BIT);
 139     return SCM_UNSPECIFIED;
 140   }
 141
 142   SCM
 143   irr_video_endScene (SCM wrapped_video_driver)
 144   {
 145     irr::video::IVideoDriver* driver = unwrap_video_driver (wrapped_video_driver);
 146     return scm_from_bool (driver->endScene ());
 147   }
 148
 149   SCM
 150   irr_video_getFPS (SCM wrapped_video_driver)
 151   {
 152     irr::video::IVideoDriver* driver = unwrap_video_driver (wrapped_video_driver);
 153     return scm_from_int32 (driver->getFPS ());
 154   }
 155
 156   SCM
 157   irr_video_getTexture (SCM wrapped_video_driver,
 158                         SCM filename)
 159   {
 160     irr::video::IVideoDriver* driver = unwrap_video_driver (wrapped_video_driver);
 161     irr::video::ITexture* texture = driver->getTexture (scm_to_utf8_stringn (filename, NULL));
 162     return wrap_texture (texture);
 163   }
 164
 165   SCM
 166   irr_video_setMaterial (SCM wrapped_video_driver,
 167                          SCM material)
 168   {
 169     irr::video::IVideoDriver* driver = unwrap_video_driver (wrapped_video_driver);
 170     driver->setMaterial (*(unwrap_material (material)));
 171     return SCM_UNSPECIFIED;
 172   }
 173
 174   SCM
 175   irr_video_setTransform (SCM wrapped_video_driver,
 176                           SCM state,
 177                           SCM mat)
 178   {
 179     irr::video::IVideoDriver* driver = unwrap_video_driver (wrapped_video_driver);
 180     driver->setTransform (scm_to_transformation_state (state),
 181                           scm_to_matrix4 (mat));
 182     return SCM_UNSPECIFIED;
 183   }
 184
 185   SCM
 186   irr_getVideoDriver (SCM wrapped_obj)
 187   {
 188     irr::video::IVideoDriver* driver;
 189     if (device_p (wrapped_obj))
 190       {
 191         driver = unwrap_device (wrapped_obj)->getVideoDriver ();
 192       }
 193     else
 194       {
 195         scm_error (scm_arg_type_key, NULL, "Cannot get video driver from object: ~S",
 196                    scm_list_1 (wrapped_obj), scm_list_1 (wrapped_obj));
 197       }
 198     return wrap_video_driver (driver);
 199   }
 200
 201   irr::video::E_TRANSFORMATION_STATE
 202   scm_to_transformation_state (SCM transformation_state)
 203   {
 204     char* state = scm_to_utf8_stringn (scm_symbol_to_string (transformation_state), NULL);
 205     if (!strcmp (state, "view"))
 206       {
 207         return irr::video::ETS_VIEW;
 208       }
 209     else if (!strcmp (state, "world"))
 210       {
 211         return irr::video::ETS_WORLD;
 212       }
 213     else if (!strcmp (state, "projection"))
 214       {
 215         return irr::video::ETS_PROJECTION;
 216       }
 217     else if (!strcmp (state, "texture0"))
 218       {
 219         return irr::video::ETS_TEXTURE_0;
 220       }
 221     else if (!strcmp (state, "texture1"))
 222       {
 223         return irr::video::ETS_TEXTURE_1;
 224       }
 225     else if (!strcmp (state, "texture2"))
 226       {
 227         return irr::video::ETS_TEXTURE_2;
 228       }
 229     else if (!strcmp (state, "texture3"))
 230       {
 231         return irr::video::ETS_TEXTURE_3;
 232       }
 233     else
 234       {
 235         scm_error (scm_arg_type_key, NULL, "Wrong transformation state: ~S",
 236                    scm_list_1 (transformation_state), scm_list_1 (transformation_state));
 237       }
 238   }
 239
 240 }