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https://github.com/OpenRCT2/OpenRCT2
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dynamically import OpenGL functions
This commit is contained in:
Ted John
@@ -27,8 +27,6 @@
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#include "../../core/Console.hpp"
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#pragma comment(lib, "opengl32.lib")
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template <typename T>
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static inline bool SetProc(T * func, const char * name)
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{
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@@ -52,6 +50,31 @@ static inline bool SetProc(T * func, const char * name)
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static const char * TryLoadAllProcAddresses()
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{
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// 1.1 functions
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SetupOpenGLFunction(glBegin);
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SetupOpenGLFunction(glBindTexture);
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SetupOpenGLFunction(glBlendFunc);
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SetupOpenGLFunction(glClear);
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SetupOpenGLFunction(glClearColor);
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SetupOpenGLFunction(glColor3f);
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SetupOpenGLFunction(glColor4f);
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SetupOpenGLFunction(glDeleteTextures);
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SetupOpenGLFunction(glDisable);
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SetupOpenGLFunction(glEnable);
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SetupOpenGLFunction(glEnd);
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SetupOpenGLFunction(glGenTextures);
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SetupOpenGLFunction(glLoadIdentity);
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SetupOpenGLFunction(glMatrixMode);
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SetupOpenGLFunction(glOrtho);
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SetupOpenGLFunction(glScalef);
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SetupOpenGLFunction(glTexCoord2f);
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SetupOpenGLFunction(glTexImage2D);
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SetupOpenGLFunction(glTexParameteri);
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SetupOpenGLFunction(glTranslatef);
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SetupOpenGLFunction(glVertex2i);
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SetupOpenGLFunction(glViewport);
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// 2.0+ functions
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SetupOpenGLFunction(glCreateShader);
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SetupOpenGLFunction(glDeleteShader);
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@@ -16,8 +16,80 @@
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#pragma once
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// BEGIN [Do not define 1.1 function signatures]
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#define glBegin __static__glBegin
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#define glBindTexture __static__glBindTexture
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#define glBlendFunc __static__glBlendFunc
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#define glClear __static__glClear
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#define glClearColor __static__glClearColor
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#define glColor3f __static__glColor3f
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#define glColor4f __static__glColor4f
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#define glDeleteTextures __static__glDeleteTextures
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#define glDisable __static__glDisable
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#define glEnable __static__glEnable
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#define glEnd __static__glEnd
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#define glGenTextures __static__glGenTextures
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#define glLoadIdentity __static__glLoadIdentity
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#define glMatrixMode __static__glMatrixMode
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#define glOrtho __static__glOrtho
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#define glScalef __static__glScalef
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#define glTexCoord2f __static__glTexCoord2f
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#define glTexImage2D __static__glTexImage2D
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#define glTexParameteri __static__glTexParameteri
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#define glTranslatef __static__glTranslatef
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#define glVertex2i __static__glVertex2i
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#define glViewport __static__glViewport
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#include <SDL_opengl.h>
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// END [Do not define 1.1 function signatures]
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#undef glBegin
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#undef glBindTexture
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#undef glBlendFunc
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#undef glClear
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#undef glClearColor
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#undef glColor3f
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#undef glColor4f
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#undef glDeleteTextures
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#undef glDisable
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#undef glEnable
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#undef glEnd
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#undef glGenTextures
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#undef glLoadIdentity
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#undef glMatrixMode
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#undef glOrtho
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#undef glScalef
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#undef glTexCoord2f
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#undef glTexImage2D
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#undef glTexParameteri
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#undef glTranslatef
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#undef glVertex2i
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#undef glViewport
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// 1.1 function signatures
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typedef void (APIENTRYP PFNGLBEGINPROC )(GLenum mode);
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typedef void (APIENTRYP PFNGLBINDTEXTUREPROC )(GLenum target, GLuint texture);
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typedef void (APIENTRYP PFNGLBLENDFUNCPROC )(GLenum sfactor, GLenum dfactor);
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typedef void (APIENTRYP PFNGLCLEARPROC )(GLbitfield mask);
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typedef void (APIENTRYP PFNGLCLEARCOLORPROC )(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
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typedef void (APIENTRYP PFNGLCOLOR3FPROC )(GLfloat red, GLfloat green, GLfloat blue);
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typedef void (APIENTRYP PFNGLCOLOR4FPROC )(GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha);
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typedef void (APIENTRYP PFNGLDELETETEXTURESPROC)(GLsizei n, const GLuint *textures);
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typedef void (APIENTRYP PFNGLDISABLEPROC )(GLenum cap);
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typedef void (APIENTRYP PFNGLENABLEPROC )(GLenum cap);
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typedef void (APIENTRYP PFNGLENDPROC )(void);
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typedef void (APIENTRYP PFNGLGENTEXTURESPROC )(GLsizei n, GLuint *textures);
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typedef void (APIENTRYP PFNGLLOADIDENTITYPROC )(void);
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typedef void (APIENTRYP PFNGLMATRIXMODEPROC )(GLenum mode);
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typedef void (APIENTRYP PFNGLORTHOPROC )(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble near_val, GLdouble far_val);
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typedef void (APIENTRYP PFNGLSCALEFPROC )(GLfloat x, GLfloat y, GLfloat z);
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typedef void (APIENTRYP PFNGLTEXCOORD2FPROC )(GLfloat s, GLfloat t);
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typedef void (APIENTRYP PFNGLTEXIMAGE2DPROC )(GLenum target, GLint level, GLint internalFormat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
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typedef void (APIENTRYP PFNGLTEXPARAMETERIPROC )(GLenum target, GLenum pname, GLint param);
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typedef void (APIENTRYP PFNGLTRANSLATEFPROC )(GLfloat x, GLfloat y, GLfloat z);
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typedef void (APIENTRYP PFNGLVERTEX2IPROC )(GLint x, GLint y);
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typedef void (APIENTRYP PFNGLVIEWPORTPROC )(GLint x, GLint y, GLsizei width, GLsizei height);
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#if __WINDOWS__
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#ifdef NO_EXTERN_GLAPI
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@@ -28,8 +100,33 @@
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#define GLAPI_SET
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#endif
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GLAPI_DECL PFNGLCREATESHADERPROC glCreateShader GLAPI_SET;
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GLAPI_DECL PFNGLDELETESHADERPROC glDeleteShader GLAPI_SET;
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// 1.1 function pointers
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GLAPI_DECL PFNGLBEGINPROC glBegin GLAPI_SET;
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GLAPI_DECL PFNGLBINDTEXTUREPROC glBindTexture GLAPI_SET;
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GLAPI_DECL PFNGLBLENDFUNCPROC glBlendFunc GLAPI_SET;
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GLAPI_DECL PFNGLCLEARPROC glClear GLAPI_SET;
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GLAPI_DECL PFNGLCLEARCOLORPROC glClearColor GLAPI_SET;
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GLAPI_DECL PFNGLCOLOR3FPROC glColor3f GLAPI_SET;
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GLAPI_DECL PFNGLCOLOR4FPROC glColor4f GLAPI_SET;
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GLAPI_DECL PFNGLDELETETEXTURESPROC glDeleteTextures GLAPI_SET;
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GLAPI_DECL PFNGLDISABLEPROC glDisable GLAPI_SET;
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GLAPI_DECL PFNGLENABLEPROC glEnable GLAPI_SET;
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GLAPI_DECL PFNGLENDPROC glEnd GLAPI_SET;
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GLAPI_DECL PFNGLGENTEXTURESPROC glGenTextures GLAPI_SET;
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GLAPI_DECL PFNGLLOADIDENTITYPROC glLoadIdentity GLAPI_SET;
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GLAPI_DECL PFNGLMATRIXMODEPROC glMatrixMode GLAPI_SET;
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GLAPI_DECL PFNGLORTHOPROC glOrtho GLAPI_SET;
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GLAPI_DECL PFNGLSCALEFPROC glScalef GLAPI_SET;
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GLAPI_DECL PFNGLTEXCOORD2FPROC glTexCoord2f GLAPI_SET;
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GLAPI_DECL PFNGLTEXIMAGE2DPROC glTexImage2D GLAPI_SET;
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GLAPI_DECL PFNGLTEXPARAMETERIPROC glTexParameteri GLAPI_SET;
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GLAPI_DECL PFNGLTRANSLATEFPROC glTranslatef GLAPI_SET;
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GLAPI_DECL PFNGLVERTEX2IPROC glVertex2i GLAPI_SET;
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GLAPI_DECL PFNGLVIEWPORTPROC glViewport GLAPI_SET;
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// 2.0+ function pointers
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GLAPI_DECL PFNGLCREATESHADERPROC glCreateShader GLAPI_SET;
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GLAPI_DECL PFNGLDELETESHADERPROC glDeleteShader GLAPI_SET;
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#endif /* __WINDOWS__ */
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