1/*
2 * fg_gl2.c
3 *
4 * Load OpenGL (ES) 2.0 functions used by fg_geometry
5 *
6 * Copyright (C) 2012 Sylvain Beucler
7 *
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:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
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.
24 */
25
26#include <GL/freeglut.h>
27#include "fg_internal.h"
28#include "fg_gl2.h"
29
30void FGAPIENTRY glutSetVertexAttribCoord3(GLint attrib) {
31 if (fgStructure.CurrentWindow != NULL)
32 fgStructure.CurrentWindow->Window.attribute_v_coord = attrib;
33}
34
35void FGAPIENTRY glutSetVertexAttribNormal(GLint attrib) {
36 if (fgStructure.CurrentWindow != NULL)
37 fgStructure.CurrentWindow->Window.attribute_v_normal = attrib;
38}
39
40void FGAPIENTRY glutSetVertexAttribTexCoord2(GLint attrib) {
41 if (fgStructure.CurrentWindow != NULL)
42 fgStructure.CurrentWindow->Window.attribute_v_texture = attrib;
43}
44
45void fgInitGL2() {
46#ifdef GL_ES_VERSION_2_0
47 fgState.HasOpenGL20 = (fgState.MajorVersion >= 2);
48#else
49 /* TODO: Mesa returns a valid stub function, rather than NULL,
50 when we request a non-existent function */
51#define CHECK(func, a) if ((a) == NULL) { fgWarning("fgInitGL2: " func " is NULL"); return; }
52 CHECK("fghGenBuffers", fghGenBuffers = (FGH_PFNGLGENBUFFERSPROC)glutGetProcAddress("glGenBuffers"));
53 CHECK("fghDeleteBuffers", fghDeleteBuffers = (FGH_PFNGLDELETEBUFFERSPROC)glutGetProcAddress("glDeleteBuffers"));
54 CHECK("fghBindBuffer", fghBindBuffer = (FGH_PFNGLBINDBUFFERPROC)glutGetProcAddress("glBindBuffer"));
55 CHECK("fghBufferData", fghBufferData = (FGH_PFNGLBUFFERDATAPROC)glutGetProcAddress("glBufferData"));
56 CHECK("fghVertexAttribPointer", fghVertexAttribPointer = (FGH_PFNGLVERTEXATTRIBPOINTERPROC)glutGetProcAddress("glVertexAttribPointer"));
57 CHECK("fghEnableVertexAttribArray", fghEnableVertexAttribArray = (FGH_PFNGLENABLEVERTEXATTRIBARRAYPROC)glutGetProcAddress("glEnableVertexAttribArray"));
58 CHECK("fghDisableVertexAttribArray", fghDisableVertexAttribArray = (FGH_PFNGLDISABLEVERTEXATTRIBARRAYPROC)glutGetProcAddress("glDisableVertexAttribArray"));
59#undef CHECK
60 fgState.HasOpenGL20 = 1;
61#endif
62}
63