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/*
* File: glwrap.c
* Purpose: Wrapper functions for Win32 OpenGL functions
*
* Authors: Alexander Gottwald
* Jon TURNEY
*
* Copyright (c) Jon TURNEY 2009
* Copyright (c) Alexander Gottwald 2004
*
*
* 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
* THE ABOVE LISTED COPYRIGHT HOLDER(S) 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.
*/
// define USE_OPENGL32 makes gl.h declare gl*() function prototypes with stdcall linkage,
// so our generated wrappers will correctly link with the functions in opengl32.dll
#define USE_OPENGL32
#ifdef HAVE_XWIN_CONFIG_H
#include <xwin-config.h>
#endif
#include <X11/Xwindows.h>
#include <GL/gl.h>
#include <GL/glext.h>
#include <glx/glxserver.h>
#include <glx/glxext.h>
#include <glx/glapi.h>
#include <glx/dispatch.h>
#include <glwindows.h>
#include <winmsg.h>
#ifdef _DEBUG
static unsigned int glWinIndirectProcCalls = 0;
static unsigned int glWinDirectProcCalls = 0;
void
glWinCallDelta(void)
{
static unsigned int glWinIndirectProcCallsLast = 0;
static unsigned int glWinDirectProcCallsLast = 0;
if ((glWinIndirectProcCalls != glWinIndirectProcCallsLast) ||
(glWinDirectProcCalls != glWinDirectProcCallsLast)) {
if (glxWinDebugSettings.enableTrace) {
ErrorF("after %d direct and %d indirect GL calls\n",
glWinDirectProcCalls - glWinDirectProcCallsLast,
glWinIndirectProcCalls - glWinIndirectProcCallsLast);
}
glWinDirectProcCallsLast = glWinDirectProcCalls;
glWinIndirectProcCallsLast = glWinIndirectProcCalls;
}
}
#endif
static PROC
glWinResolveHelper(PROC * cache, const char *symbol)
{
PROC proc = NULL;
/* If not yet cached, call wglGetProcAddress */
if ((*cache) == NULL) {
proc = wglGetProcAddress(symbol);
if (proc == NULL) {
winDebug("glwrap: Can't resolve \"%s\"\n", symbol);
(*cache) = (PROC) - 1;
}
else {
winDebug("glwrap: Resolved \"%s\"\n", symbol);
(*cache) = proc;
}
}
/* Cached wglGetProcAddress failure */
else if ((*cache) == (PROC) - 1) {
proc = 0;
}
/* Cached wglGetProcAddress result */
else {
proc = (*cache);
}
return proc;
}
#ifdef _DEBUG
#define INCPROCCALLS glWinIndirectProcCalls++;
#else
#define INCPROCCALLS
#endif
#define RESOLVE_RET(proctype, symbol, retval) \
static PROC cache = NULL; \
proctype proc = (proctype)glWinResolveHelper(&cache, symbol); \
if (proc == NULL) { \
__glXErrorCallBack(0); \
return retval; \
} \
INCPROCCALLS
#define RESOLVE(proctype, symbol) RESOLVE_RET(proctype, symbol,)
#define RESOLVED_PROC(proctype) proc
/*
Include generated cdecl wrappers for stdcall gl*() functions in opengl32.dll
OpenGL 1.2 and upward is treated as extensions, function address must
found using wglGetProcAddress(), but also stdcall so still need wrappers...
Include generated dispatch table setup function
*/
#include "generated_gl_wrappers.c"
/*
Special non-static wrapper for glGetString for debug output
*/
const GLubyte *
glGetStringWrapperNonstatic(GLenum name)
{
return glGetString(name);
}
/*
Special non-static wrapper for glAddSwapHintRectWIN for copySubBuffers
*/
typedef void (__stdcall * PFNGLADDSWAPHINTRECTWIN) (GLint x, GLint y,
GLsizei width,
GLsizei height);
void
glAddSwapHintRectWINWrapperNonstatic(GLint x, GLint y, GLsizei width,
GLsizei height)
{
RESOLVE(PFNGLADDSWAPHINTRECTWIN, "glAddSwapHintRectWIN");
proc(x, y, width, height);
}
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