Dogcows Code - chaz/yoink/blob - src/moof/opengl.hh

   1
   2 /*]  Copyright (c) 2009-2010, Charles McGarvey  [**************************
   3 **]  All rights reserved.
   4 *
   5 * vi:ts=4 sw=4 tw=75
   6 *
   7 * Distributable under the terms and conditions of the 2-clause BSD license;
   8 * see the file COPYING for a complete text of the license.
   9 *
  10 **************************************************************************/
  11
  12 #ifndef _MOOF_OPENGL_HH_
  13 #define _MOOF_OPENGL_HH_
  14
  15 /**
  16  * \file opengl.hh
  17  * Defines macros for OpenGL functions that operate on scalars, vectors,
  18  * and matrices.
  19  */
  20
  21 #include "config.h"
  22
  23 #include <vector>
  24
  25 #include <SDL/SDL_opengl.h>
  26
  27 #include <moof/math.hh>
  28
  29
  30 // generic function arguments
  31
  32 #define ARGS_P          const GLscalar* p
  33 #define PASS_P          p
  34
  35 #define ARGS_M          const moof::matrix4& m
  36 #define PASS_M          m.data()
  37
  38 // ordinal function arguments
  39
  40 #define ARGS_S2         GLscalar a, GLscalar b
  41 #define PASS_S2         a, b
  42 #define ARGS_S3         GLscalar a, GLscalar b, GLscalar c
  43 #define PASS_S3         a, b, c
  44 #define ARGS_S4         GLscalar a, GLscalar b, GLscalar c, GLscalar d
  45 #define PASS_S4         a, b, c, d
  46
  47 #define ARGS_P2         const moof::vector2& p
  48 #define PASS_P2         p.data()
  49 #define ARGS_P3         const moof::vector3& p
  50 #define PASS_P3         p.data()
  51 #define ARGS_P4         const moof::vector4& p
  52 #define PASS_P4         p.data()
  53
  54 #define ARGS_V2         const moof::vector2& v
  55 #define PASS_V2         v[0], v[1]
  56 #define ARGS_V3         const moof::vector3& v
  57 #define PASS_V3         v[0], v[1], v[2]
  58 #define ARGS_V4         const moof::vector4& v
  59 #define PASS_V4         v[0], v[1], v[2], v[3]
  60
  61
  62 #if ENABLE_DOUBLE_PRECISION
  63
  64 #define OPENGL_GENERIC_FUNC(R, N, L)                                                                    \
  65         inline R gl##N(ARGS_##L) { gl##N##d(PASS_##L); }//
  66
  67 #define OPENGL_ORDINAL_FUNC(R, N, K)                                                                    \
  68         inline R gl##N(ARGS_##S##K) { gl##N##K##d(PASS_##S##K); }                       \
  69         inline R gl##N(ARGS_##P##K) { gl##N##K##d##v(PASS_##P##K); }//
  70
  71 #else
  72
  73 #define OPENGL_GENERIC_FUNC(R, N, L)                                                                    \
  74         inline R gl##N(ARGS_##L) { gl##N##f(PASS_##L); }//
  75
  76 #define OPENGL_ORDINAL_FUNC(R, N, K)                                                                    \
  77         inline R gl##N(ARGS_##S##K) { gl##N##K##f(PASS_##S##K); }                       \
  78         inline R gl##N(ARGS_##P##K) { gl##N##K##f##v(PASS_##P##K); }//
  79
  80 #endif
  81
  82
  83 OPENGL_GENERIC_FUNC(void,       LoadMatrix,     P);
  84 OPENGL_GENERIC_FUNC(void,       LoadMatrix,     M);
  85 OPENGL_GENERIC_FUNC(void,       MultMatrix, P);
  86 OPENGL_GENERIC_FUNC(void,       MultMatrix, M);
  87
  88 OPENGL_GENERIC_FUNC(void,       Scale,          S3);
  89 OPENGL_GENERIC_FUNC(void,       Scale,          V3);
  90 OPENGL_GENERIC_FUNC(void,       Rotate,         S4);
  91 OPENGL_GENERIC_FUNC(void,       Rotate,         V4);
  92 OPENGL_GENERIC_FUNC(void,       Translate,      S3);
  93 OPENGL_GENERIC_FUNC(void,       Translate,      V3);
  94
  95 OPENGL_ORDINAL_FUNC(void,       Color,          3);
  96 OPENGL_ORDINAL_FUNC(void,       Color,          4);
  97
  98 OPENGL_ORDINAL_FUNC(void,       Vertex,         2);
  99 OPENGL_ORDINAL_FUNC(void,       Vertex,         3);
 100 OPENGL_ORDINAL_FUNC(void,       Vertex,         4);
 101
 102 OPENGL_ORDINAL_FUNC(void,       TexCoord,       2);
 103 OPENGL_ORDINAL_FUNC(void,       TexCoord,       3);
 104 OPENGL_ORDINAL_FUNC(void,       TexCoord,       4);
 105
 106 OPENGL_GENERIC_FUNC(void,       Rect,           S4);
 107 OPENGL_GENERIC_FUNC(void,       Rect,           V4);
 108
 109
 110 inline void glMaterial(GLenum face, GLenum pname, moof::scalar s)
 111 {
 112         glMaterialf(face, pname, float(s));
 113 }
 114
 115 inline void glMaterial(GLenum face, GLenum pname, const moof::vector4& v)
 116 {
 117 #if ENABLE_DOUBLE_PRECISION
 118         float f[] = {v[0], v[1], v[2], v[3]};
 119         glMaterialfv(face, pname, f);
 120 #else
 121         glMaterialfv(face, pname, v.data());
 122 #endif
 123 }
 124
 125 inline void glVertexPointer(const std::vector<moof::vector3>& v)
 126 {
 127         glVertexPointer(3, GL_SCALAR, 0, v[0].data());
 128 }
 129 inline void glTexCoordPointer(const std::vector<moof::vector2>& v)
 130 {
 131         glTexCoordPointer(2, GL_SCALAR, 0, v[0].data());
 132 }
 133
 134 inline void glDrawElements(GLenum type, const std::vector<GLuint>& v)
 135 {
 136         glDrawElements(type, v.size(), GL_UNSIGNED_INT, &v[0]);
 137 }
 138
 139
 140 #if ENABLE_DOUBLE_PRECISION
 141 inline void glGetScalar(GLenum a, GLscalar* b) { glGetDoublev(a, b); }
 142 #else
 143 inline void glGetScalar(GLenum a, GLscalar* b) { glGetFloatv(a, b); }
 144 #endif
 145
 146
 147 #endif // _MOOF_OPENGL_HH_
 148