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#import <Cocoa/Cocoa.h>
#import <OpenGL/gl.h>
typedef int Bool;
void* createContext(void* nsView, void* shareContext) {
NSView *view = nsView;
NSOpenGLContext *share = shareContext;
// FIXME: hardcoded pixel format. Instead pass these attributes down
// as arguments. There is really no way to enumerate the possible
// pixel formats for a given window on Mac OS X, so we will assume
// that we can match the requested capabilities and leave the
// selection up to the built-in pixel format selection algorithm.
GLuint attribs[] = {
NSOpenGLPFANoRecovery,
NSOpenGLPFAWindow,
NSOpenGLPFAAccelerated,
NSOpenGLPFADoubleBuffer,
NSOpenGLPFAColorSize, 32,
NSOpenGLPFAAlphaSize, 8,
NSOpenGLPFADepthSize, 24,
NSOpenGLPFAStencilSize, 8,
NSOpenGLPFAAccumSize, 0,
0
};
NSOpenGLPixelFormat* fmt = [[NSOpenGLPixelFormat alloc] initWithAttributes: (NSOpenGLPixelFormatAttribute*) attribs];
NSOpenGLContext* context = [[NSOpenGLContext alloc] initWithFormat: [fmt autorelease] shareContext: share];
if (view != nil) {
[context setView: view];
[context makeCurrentContext];
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
[context update];
[context flushBuffer];
}
return context;
}
Bool makeCurrentContext(void* nsView, void* nsContext) {
NSOpenGLContext *context = nsContext;
[context makeCurrentContext];
return true;
}
Bool clearCurrentContext(void* nsView, void* nsContext) {
NSView *view = nsView;
NSOpenGLContext *context = nsContext;
[NSOpenGLContext clearCurrentContext];
return true;
}
void updateContext(void* nsView, void* nsContext) {
NSView *view = nsView;
NSOpenGLContext *context = nsContext;
[context update];
}
Bool deleteContext(void* nsView, void* nsContext) {
NSOpenGLContext *context = nsContext;
[context setView: nil];
[context release];
return true;
}
Bool flushBuffer(void* nsView, void* nsContext) {
NSOpenGLContext *context = nsContext;
[context flushBuffer];
return true;
}
#include <mach-o/dyld.h>
Bool imagesInitialized = false;
static char libGLStr[] = "/System/Library/Frameworks/OpenGL.framework/Libraries/libGL.dylib";
static char libGLUStr[] = "/System/Library/Frameworks/OpenGL.framework/Libraries/libGLU.dylib";
static const struct mach_header *libGLImage;
static const struct mach_header *libGLUImage;
void* getProcAddress(const char *procname) {
if (imagesInitialized == false) {
imagesInitialized = true;
unsigned long options = NSADDIMAGE_OPTION_RETURN_ON_ERROR;
libGLImage = NSAddImage(libGLStr, options);
libGLUImage = NSAddImage(libGLUStr, options);
}
unsigned long options = NSLOOKUPSYMBOLINIMAGE_OPTION_BIND | NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR;
char underscoreName[512] = "_";
strcat(underscoreName, procname);
if (NSIsSymbolNameDefinedInImage(libGLImage, underscoreName) == YES) {
NSSymbol sym = NSLookupSymbolInImage(libGLImage, underscoreName, options);
return NSAddressOfSymbol(sym);
}
if (NSIsSymbolNameDefinedInImage(libGLUImage, underscoreName) == YES) {
NSSymbol sym = NSLookupSymbolInImage(libGLUImage, underscoreName, options);
return NSAddressOfSymbol(sym);
}
if (NSIsSymbolNameDefinedWithHint(underscoreName, "GL")) {
NSSymbol sym = NSLookupAndBindSymbol(underscoreName);
return NSAddressOfSymbol(sym);
}
return NULL;
}
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