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fg_gl2: Use GLES2 functions directly

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git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@1253 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
beuc 2012-04-21 16:45:46 +00:00
parent 41c8a0c66b
commit 77d621e304
2 changed files with 36 additions and 10 deletions
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16
freeglut/freeglut/src/fg_gl2.c
View File

@ -38,17 +38,19 @@ void FGAPIENTRY glutSetVertexAttribNormal(GLint attrib) {
}
void fgInitGL2() {
#ifndef GL_ES_VERSION_2_0
fgState.HasOpenGL20 = 0;
// TODO: Mesa returns a valid stub function, rather than NULL,
// when we request a non-existent function
#define CHECK(func, a) if ((a) == NULL) { fgWarning("fgInitGL2: " func " is NULL"); return; }
CHECK("fghGenBuffers", fghGenBuffers = (FGH_PFNGLGENBUFFERSPROC) glutGetProcAddress ("glGenBuffers"));
CHECK("fghDeleteBuffers", fghDeleteBuffers = (FGH_PFNGLDELETEBUFFERSPROC) glutGetProcAddress ("glDeleteBuffers"));
CHECK("fghBindBuffer", fghBindBuffer = (FGH_PFNGLBINDBUFFERPROC) glutGetProcAddress ("glBindBuffer"));
CHECK("fghBufferData", fghBufferData = (FGH_PFNGLBUFFERDATAPROC) glutGetProcAddress ("glBufferData"));
CHECK("fghVertexAttribPointer", fghVertexAttribPointer = (FGH_PFNGLVERTEXATTRIBPOINTERPROC) glutGetProcAddress ("glVertexAttribPointer"));
CHECK("fghEnableVertexAttribArray", fghEnableVertexAttribArray = (FGH_PFNGLENABLEVERTEXATTRIBARRAYPROC) glutGetProcAddress ("glEnableVertexAttribArray"));
CHECK("fghDisableVertexAttribArray", fghDisableVertexAttribArray = (FGH_PFNGLDISABLEVERTEXATTRIBARRAYPROC) glutGetProcAddress ("glDisableVertexAttribArray"));
CHECK("fghGenBuffers", fghGenBuffers = (FGH_PFNGLGENBUFFERSPROC)glutGetProcAddress("glGenBuffers"));
CHECK("fghDeleteBuffers", fghDeleteBuffers = (FGH_PFNGLDELETEBUFFERSPROC)glutGetProcAddress("glDeleteBuffers"));
CHECK("fghBindBuffer", fghBindBuffer = (FGH_PFNGLBINDBUFFERPROC)glutGetProcAddress("glBindBuffer"));
CHECK("fghBufferData", fghBufferData = (FGH_PFNGLBUFFERDATAPROC)glutGetProcAddress("glBufferData"));
CHECK("fghVertexAttribPointer", fghVertexAttribPointer = (FGH_PFNGLVERTEXATTRIBPOINTERPROC)glutGetProcAddress("glVertexAttribPointer"));
CHECK("fghEnableVertexAttribArray", fghEnableVertexAttribArray = (FGH_PFNGLENABLEVERTEXATTRIBARRAYPROC)glutGetProcAddress("glEnableVertexAttribArray"));
CHECK("fghDisableVertexAttribArray", fghDisableVertexAttribArray = (FGH_PFNGLDISABLEVERTEXATTRIBARRAYPROC)glutGetProcAddress("glDisableVertexAttribArray"));
#undef CHECK
#endif
fgState.HasOpenGL20 = 1;
}

28
freeglut/freeglut/src/fg_gl2.h
View File

@ -26,9 +26,31 @@
#ifndef FG_GL2_H
#define FG_GL2_H
#ifndef APIENTRY
#include <GL/freeglut.h>
#include "fg_internal.h"
#ifdef GL_ES_VERSION_2_0
/* Use existing functions on GLES 2.0 */
#define FGH_ARRAY_BUFFER GL_ARRAY_BUFFER
#define FGH_STATIC_DRAW GL_STATIC_DRAW
#define FGH_ELEMENT_ARRAY_BUFFER GL_ELEMENT_ARRAY_BUFFER
#define fghGenBuffers glGenBuffers
#define fghDeleteBuffers glDeleteBuffers
#define fghBindBuffer glBindBuffer
#define fghBufferData glBufferData
#define fghEnableVertexAttribArray glEnableVertexAttribArray
#define fghDisableVertexAttribArray glDisableVertexAttribArray
#define fghVertexAttribPointer glVertexAttribPointer
#else
/* Load functions dynamically, they are not defined in e.g. win32's
OpenGL headers */
# ifndef APIENTRY
# define APIENTRY
#endif
# endif
/* extension #defines, types and entries, avoiding a dependency on additional
libraries like GLEW or the GL/glext.h header */
@ -53,4 +75,6 @@ FGH_PFNGLENABLEVERTEXATTRIBARRAYPROC fghEnableVertexAttribArray;
FGH_PFNGLDISABLEVERTEXATTRIBARRAYPROC fghDisableVertexAttribArray;
FGH_PFNGLVERTEXATTRIBPOINTERPROC fghVertexAttribPointer;
# endif
#endif