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 "vertex3d.h"
  30 #include "video-driver.h"
  31 #include "wchar.h"
  32 #include "wrapped.h"
  33
  34 using namespace irr;
  35
  36 SCM
  37 IVideoDriver_beginScene (SCM video_driver,
  38                          SCM back_buffer,
  39                          SCM z_buffer,
  40                          SCM color,
  41                          SCM video_data,
  42                          SCM source_rect)
  43 {
  44   video::IVideoDriver* driver = (video::IVideoDriver*) scm_to_irr_pointer (video_driver);
  45
  46   // Source rect
  47   core::rect<s32>* sourceRectAddress = 0;
  48   if (!scm_is_false (source_rect))
  49     {
  50       core::rect<s32> sourceRect = scm_to_rect_s32 (source_rect);
  51       sourceRectAddress = &sourceRect;
  52     }
  53
  54   return scm_from_bool (driver->beginScene (scm_to_bool (back_buffer),
  55                                             scm_to_bool (z_buffer),
  56                                             scm_to_color (color),
  57                                             video::SExposedVideoData (),
  58                                             sourceRectAddress));
  59 }
  60
  61 SCM
  62 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_irr_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_irr_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 SCM
 105 IVideoDriver_endScene (SCM video_driver)
 106 {
 107   video::IVideoDriver* driver = (video::IVideoDriver*) scm_to_irr_pointer (video_driver);
 108   return scm_from_bool (driver->endScene ());
 109 }
 110
 111 SCM
 112 IVideoDriver_getFPS (SCM video_driver)
 113 {
 114   video::IVideoDriver* driver = (video::IVideoDriver*) scm_to_irr_pointer (video_driver);
 115   return scm_from_int32 (driver->getFPS ());
 116 }
 117
 118 SCM
 119 IVideoDriver_getName (SCM video_driver)
 120 {
 121   video::IVideoDriver* driver = (video::IVideoDriver*) scm_to_irr_pointer (video_driver);
 122   return scm_from_wide_char_string (driver->getName ());
 123 }
 124
 125 SCM
 126 IVideoDriver_getTexture (SCM video_driver,
 127                          SCM filename)
 128 {
 129   video::IVideoDriver* driver = (video::IVideoDriver*) scm_to_irr_pointer (video_driver);
 130   video::ITexture* texture = driver->getTexture (scm_to_utf8_string (filename));
 131   return scm_from_pointer ((void*) texture, NULL);
 132 }
 133
 134 SCM
 135 IVideoDriver_setMaterial (SCM video_driver,
 136                           SCM material)
 137 {
 138   video::IVideoDriver* driver = (video::IVideoDriver*) scm_to_irr_pointer (video_driver);
 139   driver->setMaterial (*((video::SMaterial*) scm_to_irr_pointer (material)));
 140   return SCM_UNSPECIFIED;
 141 }
 142
 143 SCM
 144 IVideoDriver_setTransform (SCM video_driver,
 145                            SCM state,
 146                            SCM mat)
 147 {
 148   video::IVideoDriver* driver = (video::IVideoDriver*) scm_to_irr_pointer (video_driver);
 149   driver->setTransform (scm_to_transformation_state (state),
 150                         scm_to_matrix4 (mat));
 151   return SCM_UNSPECIFIED;
 152 }
 153
 154
 155 void
 156 init_video_driver (void)
 157 {
 158   DEFINE_GSUBR ("IVideoDriver_beginScene", 6, 0, 0, IVideoDriver_beginScene);
 159   DEFINE_GSUBR ("IVideoDriver_drawVertexPrimitiveList", 5, 0, 1,
 160                 IVideoDriver_drawVertexPrimitiveList);
 161   DEFINE_GSUBR ("IVideoDriver_endScene", 1, 0, 0, IVideoDriver_endScene);
 162   DEFINE_GSUBR ("IVideoDriver_getFPS", 1, 0, 0, IVideoDriver_getFPS);
 163   DEFINE_GSUBR ("IVideoDriver_getName", 1, 0, 0, IVideoDriver_getName);
 164   DEFINE_GSUBR ("IVideoDriver_getTexture", 2, 0, 0, IVideoDriver_getTexture);
 165   DEFINE_GSUBR ("IVideoDriver_setMaterial", 2, 0, 0, IVideoDriver_setMaterial);
 166   DEFINE_GSUBR ("IVideoDriver_setTransform", 3, 0, 0, IVideoDriver_setTransform);
 167 }
 168
 169 video::E_TRANSFORMATION_STATE
 170 scm_to_transformation_state (SCM transformation_state)
 171 {
 172   char* state = scm_to_utf8_string (scm_symbol_to_string (transformation_state));
 173   if (!strcmp (state, "view"))
 174     {
 175       return video::ETS_VIEW;
 176     }
 177   else if (!strcmp (state, "world"))
 178     {
 179       return video::ETS_WORLD;
 180     }
 181   else if (!strcmp (state, "projection"))
 182     {
 183       return video::ETS_PROJECTION;
 184     }
 185   else if (!strcmp (state, "texture0"))
 186     {
 187       return video::ETS_TEXTURE_0;
 188     }
 189   else if (!strcmp (state, "texture1"))
 190     {
 191       return video::ETS_TEXTURE_1;
 192     }
 193   else if (!strcmp (state, "texture2"))
 194     {
 195       return video::ETS_TEXTURE_2;
 196     }
 197   else if (!strcmp (state, "texture3"))
 198     {
 199       return video::ETS_TEXTURE_3;
 200     }
 201   else
 202     {
 203       scm_error (scm_arg_type_key, NULL, "Wrong transformation state: ~S",
 204                  scm_list_1 (transformation_state), scm_list_1 (transformation_state));
 205     }
 206 }