我想創建一個使用Cocoa API的OpenGL應用程序,現在一切正常,除了一件事情。在調整主窗口的大小時,GL上下文似乎沒有正確更新。錯誤創建NSOpenGLView
下面是用於設置窗口和渲染上下文的代碼。
主窗口:
m_window = [[NSWindow alloc] initWithContentRect:window_rect styleMask:(NSClosableWindowMask | NSMiniaturizableWindowMask | NSTitledWindowMask | NSResizableWindowMask) backing:NSBackingStoreBuffered defer:YES];
window_title = [NSString stringWithCString:m_window_title->c_str()
encoding:NSUTF8StringEncoding];
window_color = [NSColor colorWithCalibratedRed:m_window_color->getRed()
green:m_window_color->getGreen()
blue:m_window_color->getBlue()
alpha:m_window_color->getAlpha()];
if (m_centered)
{
[m_window center];
}
[m_window setTitle:window_title];
[m_window setBackgroundColor:window_color];
[m_window setOneShot:YES];
[m_window setOpaque:YES];
[m_window setDelegate:window_delegate];
[m_window setAcceptsMouseMovedEvents:YES];
OpenGL的看法:
NSOpenGLPixelFormatAttribute attrs[] = {NSOpenGLPFADoubleBuffer, NSOpenGLPFAWindow, NULL};
pixel_format = [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs];
m_view = [[NSOpenGLView alloc] initWithFrame:[m_window contentRectForFrameRect:[m_window frame]]
pixelFormat:pixel_format];
[pixel_format release];
GLint dim[2] = {GB_DEF_WINDOW_WIDTH, GB_DEF_WINDOW_HEIGHT};
CGLContextObj ctx = (CGLContextObj) [[m_view openGLContext] CGLContextObj];
CGLSetParameter(ctx, kCGLCPSurfaceBackingSize, dim);
CGLEnable (ctx, kCGLCESurfaceBackingSize);
[[m_view openGLContext] makeCurrentContext];
[m_window setContentView:m_view];
這應該工作,但是當調整窗口大小和更新的OpenGL視圖和視後,後臺緩衝區內容似乎不會被正確地重新調整。那有什麼問題?
感謝您的回覆。