gl_context_t makeSharedGLContext(gl_context_t shareWith, char const **outError)
{
CGLContextObj shareContext = (CGLContextObj)shareWith;
CGLPixelFormatObj pixelFormat = CGLGetPixelFormat(shareContext);
CGLContextObj newContext;
CGLError code = CGLCreateContext(pixelFormat, shareContext, &newContext);
if (code != kCGLNoError) {
*outError = CGLErrorString(code);
return 0;
} else
return (gl_context_t)newContext;
}
bool nglContext::MakeCurrent(WindowRef win) const
{
bool res = true;
#ifndef __NOGLCONTEXT__
if (mCtx)
res = aglSetCurrentContext(mCtx) != 0;
if (win)
aglSetDrawable(mCtx, GetWindowPort(win));
CGLContextObj ctx = CGLGetCurrentContext();
CGLPixelFormatObj pixelFormat = CGLGetPixelFormat(ctx);
//printf("cglcontext : 0x%x / 0x%x\n", ctx, pixelFormat);
#endif
return res;
}
GraphicsSurfacePrivate(const PlatformGraphicsContext3D shareContext, const IntSize& size, GraphicsSurface::Flags flags)
: m_context(0)
, m_size(size)
, m_frontBufferTexture(0)
, m_frontBufferReadTexture(0)
, m_backBufferTexture(0)
, m_backBufferReadTexture(0)
, m_readFbo(0)
, m_drawFbo(0)
{
#if PLATFORM(QT)
QPlatformNativeInterface* nativeInterface = QGuiApplication::platformNativeInterface();
CGLContextObj shareContextObject = static_cast<CGLContextObj>(nativeInterface->nativeResourceForContext(QByteArrayLiteral("cglContextObj"), shareContext));
if (!shareContextObject)
return;
CGLPixelFormatObj pixelFormatObject = CGLGetPixelFormat(shareContextObject);
if (kCGLNoError != CGLCreateContext(pixelFormatObject, shareContextObject, &m_context))
return;
CGLRetainContext(m_context);
#endif
unsigned pixelFormat = 'BGRA';
unsigned bytesPerElement = 4;
int width = m_size.width();
int height = m_size.height();
unsigned long bytesPerRow = IOSurfaceAlignProperty(kIOSurfaceBytesPerRow, width * bytesPerElement);
if (!bytesPerRow)
return;
unsigned long allocSize = IOSurfaceAlignProperty(kIOSurfaceAllocSize, height * bytesPerRow);
if (!allocSize)
return;
const void *keys[6];
const void *values[6];
keys[0] = kIOSurfaceWidth;
values[0] = CFNumberCreate(0, kCFNumberIntType, &width);
keys[1] = kIOSurfaceHeight;
values[1] = CFNumberCreate(0, kCFNumberIntType, &height);
keys[2] = kIOSurfacePixelFormat;
values[2] = CFNumberCreate(0, kCFNumberIntType, &pixelFormat);
keys[3] = kIOSurfaceBytesPerElement;
values[3] = CFNumberCreate(0, kCFNumberIntType, &bytesPerElement);
keys[4] = kIOSurfaceBytesPerRow;
values[4] = CFNumberCreate(0, kCFNumberLongType, &bytesPerRow);
keys[5] = kIOSurfaceAllocSize;
values[5] = CFNumberCreate(0, kCFNumberLongType, &allocSize);
CFDictionaryRef dict = CFDictionaryCreate(0, keys, values, 6, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
for (unsigned i = 0; i < 6; i++)
CFRelease(values[i]);
m_frontBuffer = IOSurfaceCreate(dict);
m_backBuffer = IOSurfaceCreate(dict);
if (!(flags & GraphicsSurface::SupportsSharing))
return;
m_token = GraphicsSurfaceToken(IOSurfaceCreateMachPort(m_frontBuffer), IOSurfaceCreateMachPort(m_backBuffer));
}
