QGLPixelBufferPrivate Class Reference

#include <qglpixelbuffer_p.h>

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Detailed Description

Definition at line 110 of file qglpixelbuffer_p.h.

Public Member Functions

 QGLPixelBufferPrivate ()
bool init (const QSize &size, const QGLFormat &f, QGLWidget *shareWidget)
void common_init (const QSize &size, const QGLFormat &f, QGLWidget *shareWidget)
bool cleanup ()

Public Attributes

bool invalid
QGLContext * qctx
QGLPixelBuffer * q_ptr
QGLFormat format
QGLFormat req_format
QPointer< QGLWidget > req_shareWidget
QSize req_size

Constructor & Destructor Documentation

QGLPixelBufferPrivate::QGLPixelBufferPrivate (  )  [inline]

Definition at line 113 of file qglpixelbuffer_p.h.

References QGLExtensions::init().

00113                             : invalid(true), qctx(0), pbuf(0), ctx(0)
00114     {
00115         QGLExtensions::init();
00116 #ifdef Q_WS_WIN
00117         dc = 0;
00118 #elif defined(Q_WS_MACX)
00119         share_ctx = 0;
00120 #endif
00121     }

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Member Function Documentation

bool QGLPixelBufferPrivate::init ( const QSize &  size,
const QGLFormat &  f,
QGLWidget *  shareWidget 
)

Definition at line 148 of file qglpixelbuffer_x11.cpp.

References QX11Info::display(), GLX_PBUFFER_HEIGHT, GLX_PBUFFER_WIDTH, GLX_RGBA_TYPE, GLX_SAMPLE_BUFFERS_ARB, GLX_SAMPLES_ARB, glXChooseFBConfig, glXCreateNewContext, glXCreatePbuffer, glXGetFBConfigAttrib, qt_format_to_attrib_list(), qt_resolve_pbuffer_extensions(), qWarning(), size, X11, and XNone.

Referenced by common_init().

00149 {
00150     if (!qt_resolve_pbuffer_extensions()) {
00151         qWarning("QGLPixelBuffer: pbuffers are not supported on this system.");
00152         return false;
00153     }
00154 
00155     int attribs[40];
00156     int num_configs = 0;
00157 
00158     qt_format_to_attrib_list(f, attribs);
00159 
00160     GLXFBConfig *configs = glXChooseFBConfig(X11->display, X11->defaultScreen, attribs, &num_configs);
00161     if (configs && num_configs) {
00162         int res;
00163         glXGetFBConfigAttrib(X11->display, configs[0], GLX_LEVEL, &res);
00164         format.setPlane(res);
00165         glXGetFBConfigAttrib(X11->display, configs[0], GLX_DOUBLEBUFFER, &res);
00166         format.setDoubleBuffer(res);
00167         glXGetFBConfigAttrib(X11->display, configs[0], GLX_DEPTH_SIZE, &res);
00168         format.setDepth(res);
00169         if (format.depth())
00170             format.setDepthBufferSize(res);
00171         glXGetFBConfigAttrib(X11->display, configs[0], GLX_RGBA, &res);
00172         format.setRgba(res);
00173         glXGetFBConfigAttrib(X11->display, configs[0], GLX_RED_SIZE, &res);
00174         format.setRedBufferSize(res);
00175         glXGetFBConfigAttrib(X11->display, configs[0], GLX_GREEN_SIZE, &res);
00176         format.setGreenBufferSize(res);
00177         glXGetFBConfigAttrib(X11->display, configs[0], GLX_BLUE_SIZE, &res);
00178         format.setBlueBufferSize(res);
00179         glXGetFBConfigAttrib(X11->display, configs[0], GLX_ALPHA_SIZE, &res);
00180         format.setAlpha(res);
00181         if (format.alpha())
00182             format.setAlphaBufferSize(res);
00183         glXGetFBConfigAttrib(X11->display, configs[0], GLX_ACCUM_RED_SIZE, &res);
00184         format.setAccum(res);
00185         if (format.accum())
00186             format.setAccumBufferSize(res);
00187         glXGetFBConfigAttrib(X11->display, configs[0], GLX_STENCIL_SIZE, &res);
00188         format.setStencil(res);
00189         if (format.stencil())
00190             format.setStencilBufferSize(res);
00191         glXGetFBConfigAttrib(X11->display, configs[0], GLX_STEREO, &res);
00192         format.setStereo(res);
00193         glXGetFBConfigAttrib(X11->display, configs[0], GLX_SAMPLE_BUFFERS_ARB, &res);
00194         format.setSampleBuffers(res);
00195         if (format.sampleBuffers()) {
00196             glXGetFBConfigAttrib(X11->display, configs[0], GLX_SAMPLES_ARB, &res);
00197             format.setSamples(res);
00198         }
00199 
00200         int pb_attribs[] = {GLX_PBUFFER_WIDTH, size.width(), GLX_PBUFFER_HEIGHT, size.height(), XNone};
00201         GLXContext shareContext = 0;
00202         if (shareWidget && shareWidget->d_func()->glcx)
00203             shareContext = (GLXContext) shareWidget->d_func()->glcx->d_func()->cx;
00204 
00205         pbuf = glXCreatePbuffer(QX11Info::display(), configs[0], pb_attribs);
00206         ctx = glXCreateNewContext(QX11Info::display(), configs[0], GLX_RGBA_TYPE, shareContext, true);
00207 
00208         XFree(configs);
00209         if (!pbuf || !ctx) {
00210             qWarning("QGLPixelBuffer: Unable to create a pbuffer/context - giving up.");
00211             return false;
00212         }
00213         return true;
00214     } else {
00215         qWarning("QGLPixelBuffer: Unable to find a context/format match - giving up.");
00216         return false;
00217     }
00218 }

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void QGLPixelBufferPrivate::common_init ( const QSize &  size,
const QGLFormat &  f,
QGLWidget *  shareWidget 
)

Definition at line 67 of file qglpixelbuffer.cpp.

References format, init(), invalid, qctx, req_format, req_shareWidget, req_size, and size.

00068 {
00069     Q_Q(QGLPixelBuffer);
00070     if(init(size, format, shareWidget)) {
00071         req_size = size;
00072         req_format = format;
00073         req_shareWidget = shareWidget;
00074         invalid = false;
00075         qctx = new QGLContext(format);
00076         qctx->d_func()->sharing = (shareWidget != 0);
00077         qctx->d_func()->paintDevice = q;
00078     }
00079 }

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bool QGLPixelBufferPrivate::cleanup (  ) 

Definition at line 221 of file qglpixelbuffer_x11.cpp.

References QX11Info::display(), and glXDestroyPbuffer.

00222 {
00223     glXDestroyContext(QX11Info::display(), ctx);
00224     glXDestroyPbuffer(QX11Info::display(), pbuf);
00225     return true;
00226 }

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Member Data Documentation

bool QGLPixelBufferPrivate::invalid

Definition at line 126 of file qglpixelbuffer_p.h.

Referenced by common_init().

QGLContext* QGLPixelBufferPrivate::qctx

Definition at line 127 of file qglpixelbuffer_p.h.

Referenced by common_init().

QGLPixelBuffer* QGLPixelBufferPrivate::q_ptr

Definition at line 128 of file qglpixelbuffer_p.h.

QGLFormat QGLPixelBufferPrivate::format

Definition at line 129 of file qglpixelbuffer_p.h.

Referenced by common_init().

QGLFormat QGLPixelBufferPrivate::req_format

Definition at line 131 of file qglpixelbuffer_p.h.

Referenced by common_init().

QPointer<QGLWidget> QGLPixelBufferPrivate::req_shareWidget

Definition at line 132 of file qglpixelbuffer_p.h.

Referenced by common_init().

QSize QGLPixelBufferPrivate::req_size

Definition at line 133 of file qglpixelbuffer_p.h.

Referenced by common_init().

The documentation for this class was generated from the following files:
Generated on Thu Mar 15 17:46:05 2007 for Qt 4.2 User's Guide by  doxygen 1.5.1