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/*
* Copyright © 2014 Jon Turney
*
* 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 (including the next
* paragraph) 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
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*/
/*
Wrapper functions for calling WGL extension functions
*/
#include "wgl.h"
#include <stdio.h>
#define RESOLVE_DECL(type) \
static type type##proc = NULL;
#define PRERESOLVE(type, symbol) \
type##proc = (type)wglGetProcAddress(symbol); \
if (type##proc == NULL) \
printf("Can't resolve \"%s\"\n", symbol);
#define CHECK_RESOLVED(type, retval) \
if (type##proc == NULL) { \
return retval; \
}
#define RESOLVED_PROC(type) type##proc
RESOLVE_DECL(PFNWGLGETEXTENSIONSSTRINGARBPROC);
RESOLVE_DECL(PFNWGLCREATECONTEXTATTRIBSARBPROC);
RESOLVE_DECL(PFNWGLMAKECONTEXTCURRENTARBPROC);
RESOLVE_DECL(PFNWGLCREATEPBUFFERARBPROC);
RESOLVE_DECL(PFNWGLGETPBUFFERDCARBPROC);
RESOLVE_DECL(PFNWGLRELEASEPBUFFERDCARBPROC);
RESOLVE_DECL(PFNWGLDESTROYPBUFFERARBPROC);
void wglResolveExtensionProcs(void)
{
PRERESOLVE(PFNWGLGETEXTENSIONSSTRINGARBPROC, "wglGetExtensionsStringARB");
PRERESOLVE(PFNWGLCREATECONTEXTATTRIBSARBPROC, "wglCreateContextAttribsARB");
PRERESOLVE(PFNWGLMAKECONTEXTCURRENTARBPROC, "wglMakeContextCurrentARB");
PRERESOLVE(PFNWGLCREATEPBUFFERARBPROC, "wglCreatePbufferARB");
PRERESOLVE(PFNWGLGETPBUFFERDCARBPROC, "wglGetPbufferDCARB");
PRERESOLVE(PFNWGLRELEASEPBUFFERDCARBPROC, "wglReleasePbufferDCARB");
PRERESOLVE(PFNWGLDESTROYPBUFFERARBPROC, "wglDestroyPbufferARB");
}
const char *wglGetExtensionsStringARB(HDC hdc_)
{
CHECK_RESOLVED(PFNWGLGETEXTENSIONSSTRINGARBPROC, "");
return RESOLVED_PROC(PFNWGLGETEXTENSIONSSTRINGARBPROC)(hdc_);
}
HGLRC wglCreateContextAttribsARB(HDC hdc_, HGLRC hShareContext_,
const int *attribList_)
{
CHECK_RESOLVED(PFNWGLCREATECONTEXTATTRIBSARBPROC, NULL);
return RESOLVED_PROC(PFNWGLCREATECONTEXTATTRIBSARBPROC)(hdc_, hShareContext_, attribList_);
}
BOOL wglMakeContextCurrentARB(HDC hDrawDC_, HDC hReadDC_, HGLRC hglrc_)
{
CHECK_RESOLVED(PFNWGLMAKECONTEXTCURRENTARBPROC, false);
return RESOLVED_PROC(PFNWGLMAKECONTEXTCURRENTARBPROC)(hDrawDC_, hReadDC_, hglrc_);
}
HPBUFFERARB wglCreatePbufferARB(HDC hDC_, int iPixelFormat_, int iWidth_,
int iHeight_, const int *piAttribList_)
{
CHECK_RESOLVED(PFNWGLCREATEPBUFFERARBPROC, NULL);
return RESOLVED_PROC(PFNWGLCREATEPBUFFERARBPROC)(hDC_, iPixelFormat_, iWidth_, iHeight_, piAttribList_);
}
HDC wglGetPbufferDCARB(HPBUFFERARB hPbuffer_)
{
CHECK_RESOLVED(PFNWGLGETPBUFFERDCARBPROC, NULL);
return RESOLVED_PROC(PFNWGLGETPBUFFERDCARBPROC)(hPbuffer_);
}
int wglReleasePbufferDCARB(HPBUFFERARB hPbuffer_, HDC hDC_)
{
CHECK_RESOLVED(PFNWGLRELEASEPBUFFERDCARBPROC, 0)
return RESOLVED_PROC(PFNWGLRELEASEPBUFFERDCARBPROC)(hPbuffer_, hDC_);
}
BOOL wglDestroyPbufferARB(HPBUFFERARB hPbuffer_)
{
CHECK_RESOLVED(PFNWGLDESTROYPBUFFERARBPROC, false);
return RESOLVED_PROC(PFNWGLDESTROYPBUFFERARBPROC)(hPbuffer_);
}
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