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Declare OpenGL 2.0 dynamically-loaded functions for internal use

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git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@1220 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
beuc 2012-03-31 20:21:16 +00:00
parent 1dae162bb0
commit 63ca031e62
6 changed files with 115 additions and 0 deletions
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2
.gitattributes vendored
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@ -83,6 +83,8 @@ freeglut/freeglut/src/fg_font.c svn_keywords=Author+Date+Id+Revision
freeglut/freeglut/src/fg_font_data.c svn_keywords=Author+Date+Id+Revision
freeglut/freeglut/src/fg_gamemode.c svn_keywords=Author+Date+Id+Revision
freeglut/freeglut/src/fg_geometry.c svn_keywords=Author+Date+Id+Revision
freeglut/freeglut/src/fg_gl2.c -text
freeglut/freeglut/src/fg_gl2.h -text
freeglut/freeglut/src/fg_init.c svn_keywords=Author+Date+Id+Revision
freeglut/freeglut/src/fg_input_devices.c svn_keywords=Author+Date+Id+Revision
freeglut/freeglut/src/fg_internal.h svn_keywords=Author+Date+Id+Revision

2
freeglut/freeglut/CMakeLists.txt
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@ -43,6 +43,8 @@ SET(FREEGLUT_SRCS
src/fg_ext.c
src/fg_font_data.c
src/fg_gamemode.c
src/fg_gl2.c
src/fg_gl2.h
src/fg_init.c
src/fg_internal.h
src/fg_input_devices.c

58
freeglut/freeglut/src/fg_gl2.c Normal file
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@ -0,0 +1,58 @@
/*
* fg_gl2.c
*
* Load OpenGL (ES) 2.0 functions used by fg_geometry
*
* Copyright (C) 2012 Sylvain Beucler
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <GL/freeglut.h>
#include "fg_internal.h"
#include "fg_gl2.h"
typedef void (APIENTRY *PFNGLGENBUFFERSPROC) (GLsizei n, GLuint *buffers);
typedef void (APIENTRY *PFNGLBINDBUFFERPROC) (GLenum target, GLuint buffer);
typedef void (APIENTRY *PFNGLBUFFERDATAPROC) (GLenum target, fghGLsizeiptr size, const GLvoid *data, GLenum usage);
typedef void (APIENTRY *PFNGLDELETEBUFFERSPROC) (GLsizei n, const GLuint* buffers);
typedef void (APIENTRY *PFNGLENABLEVERTEXATTRIBARRAYPROC) (GLuint index);
typedef void (APIENTRY *PFNGLDISABLEVERTEXATTRIBARRAYPROC) (GLuint);
typedef void (APIENTRY *PFNGLVERTEXATTRIBPOINTERPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
PFNGLGENBUFFERSPROC fghGenBuffers = NULL;
PFNGLDELETEBUFFERSPROC fghDeleteBuffers = NULL;
PFNGLBINDBUFFERPROC fghBindBuffer = NULL;
PFNGLBUFFERDATAPROC fghBufferData = NULL;
PFNGLENABLEVERTEXATTRIBARRAYPROC fghEnableVertexAttribArray = NULL;
PFNGLDISABLEVERTEXATTRIBARRAYPROC fghDisableVertexAttribArray = NULL;
PFNGLVERTEXATTRIBPOINTERPROC fghVertexAttribPointer = NULL;
void fgInitGL2() {
fgState.HasOpenGL20 = 0;
#define CHECK(func, a) if ((a) == NULL) { fgWarning("fgInitGL2: " func " is NULL"); return; }
CHECK("fghGenBuffers", fghGenBuffers = (PFNGLGENBUFFERSPROC) glutGetProcAddress ("glGenBuffers"));
CHECK("fghDeleteBuffers", fghDeleteBuffers = (PFNGLDELETEBUFFERSPROC) glutGetProcAddress ("glDeleteBuffers"));
CHECK("fghBindBuffer", fghBindBuffer = (PFNGLBINDBUFFERPROC) glutGetProcAddress ("glBindBuffer"));
CHECK("fghBufferData", fghBufferData = (PFNGLBUFFERDATAPROC) glutGetProcAddress ("glBufferData"));
CHECK("fghVertexAttribPointer", fghVertexAttribPointer = (PFNGLVERTEXATTRIBPOINTERPROC) glutGetProcAddress ("glVertexAttribPointer"));
CHECK("fghEnableVertexAttribArray", fghEnableVertexAttribArray = (PFNGLENABLEVERTEXATTRIBARRAYPROC) glutGetProcAddress ("glEnableVertexAttribArray"));
CHECK("fghDisableVertexAttribArray", fghDisableVertexAttribArray = (PFNGLDISABLEVERTEXATTRIBARRAYPROC) glutGetProcAddress ("glDisnableVertexAttribArray"));
#undef CHECK
fgState.HasOpenGL20 = 1;
}

49
freeglut/freeglut/src/fg_gl2.h Normal file
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@ -0,0 +1,49 @@
/*
* fg_gl2.c
*
* Load OpenGL (ES) 2.0 functions used by fg_geometry
*
* Copyright (C) 2012 Sylvain Beucler
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef FG_GL2_H
#define FG_GL2_H
#ifndef APIENTRY
# define APIENTRY
#endif
typedef ptrdiff_t fghGLsizeiptr;
typedef void (APIENTRY *PFNGLGENBUFFERSPROC) (GLsizei n, GLuint *buffers);
typedef void (APIENTRY *PFNGLBINDBUFFERPROC) (GLenum target, GLuint buffer);
typedef void (APIENTRY *PFNGLBUFFERDATAPROC) (GLenum target, fghGLsizeiptr size, const GLvoid *data, GLenum usage);
typedef void (APIENTRY *PFNGLDELETEBUFFERSPROC) (GLsizei n, const GLuint* buffers);
typedef void (APIENTRY *PFNGLENABLEVERTEXATTRIBARRAYPROC) (GLuint index);
typedef void (APIENTRY *PFNGLDISABLEVERTEXATTRIBARRAYPROC) (GLuint);
typedef void (APIENTRY *PFNGLVERTEXATTRIBPOINTERPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
PFNGLGENBUFFERSPROC fghGenBuffers;
PFNGLDELETEBUFFERSPROC fghDeleteBuffers;
PFNGLBINDBUFFERPROC fghBindBuffer;
PFNGLBUFFERDATAPROC fghBufferData;
PFNGLENABLEVERTEXATTRIBARRAYPROC fghEnableVertexAttribArray;
PFNGLDISABLEVERTEXATTRIBARRAYPROC fghDisableVertexAttribArray;
PFNGLVERTEXATTRIBPOINTERPROC fghVertexAttribPointer;
#endif

3
freeglut/freeglut/src/fg_init.c
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@ -90,6 +90,7 @@ SFG_State fgState = { { -1, -1, GL_FALSE }, /* Position */
0, /* OpenGL context MinorVersion */
0, /* OpenGL ContextFlags */
0, /* OpenGL ContextProfile */
0, /* HasOpenGL20 */
NULL, /* ErrorFunc */
NULL /* WarningFunc */
};
@ -380,6 +381,8 @@ void FGAPIENTRY glutInit( int* pargc, char** argv )
if( (mask & (XValue|YValue)) == (XValue|YValue) )
fgState.Position.Use = GL_TRUE;
}
fgInitGL2();
}
/*

1
freeglut/freeglut/src/fg_internal.h
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@ -319,6 +319,7 @@ struct tagSFG_State
int MajorVersion; /* Major OpenGL context version */
int MinorVersion; /* Minor OpenGL context version */
int ContextFlags; /* OpenGL context flags */
int HasOpenGL20; /* fgInitGL2 could find all OpenGL 2.0 functions */
int ContextProfile; /* OpenGL context profile */
FGError ErrorFunc; /* User defined error handler */
FGWarning WarningFunc; /* User defined warning handler */