4 * Load OpenGL (ES) 2.0 functions used by fg_geometry
6 * Copyright (C) 2012 Sylvain Beucler
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
22 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 #include <GL/freeglut.h>
27 #include "fg_internal.h"
30 typedef void (APIENTRY *PFNGLGENBUFFERSPROC) (GLsizei n, GLuint *buffers);
31 typedef void (APIENTRY *PFNGLBINDBUFFERPROC) (GLenum target, GLuint buffer);
32 typedef void (APIENTRY *PFNGLBUFFERDATAPROC) (GLenum target, fghGLsizeiptr size, const GLvoid *data, GLenum usage);
33 typedef void (APIENTRY *PFNGLDELETEBUFFERSPROC) (GLsizei n, const GLuint* buffers);
34 typedef void (APIENTRY *PFNGLENABLEVERTEXATTRIBARRAYPROC) (GLuint index);
35 typedef void (APIENTRY *PFNGLDISABLEVERTEXATTRIBARRAYPROC) (GLuint);
36 typedef void (APIENTRY *PFNGLVERTEXATTRIBPOINTERPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
38 PFNGLGENBUFFERSPROC fghGenBuffers = NULL;
39 PFNGLDELETEBUFFERSPROC fghDeleteBuffers = NULL;
40 PFNGLBINDBUFFERPROC fghBindBuffer = NULL;
41 PFNGLBUFFERDATAPROC fghBufferData = NULL;
42 PFNGLENABLEVERTEXATTRIBARRAYPROC fghEnableVertexAttribArray = NULL;
43 PFNGLDISABLEVERTEXATTRIBARRAYPROC fghDisableVertexAttribArray = NULL;
44 PFNGLVERTEXATTRIBPOINTERPROC fghVertexAttribPointer = NULL;
47 fgState.HasOpenGL20 = 0;
48 #define CHECK(func, a) if ((a) == NULL) { fgWarning("fgInitGL2: " func " is NULL"); return; }
49 CHECK("fghGenBuffers", fghGenBuffers = (PFNGLGENBUFFERSPROC) glutGetProcAddress ("glGenBuffers"));
50 CHECK("fghDeleteBuffers", fghDeleteBuffers = (PFNGLDELETEBUFFERSPROC) glutGetProcAddress ("glDeleteBuffers"));
51 CHECK("fghBindBuffer", fghBindBuffer = (PFNGLBINDBUFFERPROC) glutGetProcAddress ("glBindBuffer"));
52 CHECK("fghBufferData", fghBufferData = (PFNGLBUFFERDATAPROC) glutGetProcAddress ("glBufferData"));
53 CHECK("fghVertexAttribPointer", fghVertexAttribPointer = (PFNGLVERTEXATTRIBPOINTERPROC) glutGetProcAddress ("glVertexAttribPointer"));
54 CHECK("fghEnableVertexAttribArray", fghEnableVertexAttribArray = (PFNGLENABLEVERTEXATTRIBARRAYPROC) glutGetProcAddress ("glEnableVertexAttribArray"));
55 CHECK("fghDisableVertexAttribArray", fghDisableVertexAttribArray = (PFNGLDISABLEVERTEXATTRIBARRAYPROC) glutGetProcAddress ("glDisnableVertexAttribArray"));
57 fgState.HasOpenGL20 = 1;