Changeset 769 for trunk/src/gui/egl/qegl.cpp

Timestamp:

Aug 2, 2010, 9:27:30 PM (15 years ago)

Author:

Dmitry A. Kuminov

Message:

trunk: Merged in qt 4.6.3 sources from branches/vendor/nokia/qt.

Location:

trunk

Files:

• . (modified) (1 prop)
• src/gui/egl/qegl.cpp (modified) (20 diffs)

trunk/src/gui/egl/qegl.cpp

@@ -43 +43 @@
 #include <QtGui/qpixmap.h>
 #include <QtGui/qwidget.h>
+#include <QtCore/qatomic.h>
 #include <QtCore/qdebug.h>
 #include "qegl_p.h"
 
 QT_BEGIN_NAMESPACE
+
+
+/*
+    QEglContextTracker is used to track the EGL contexts that we
+    create internally in Qt, so that we can call eglTerminate() to
+    free additional EGL resources when the last context is destroyed.
+*/
+
+class QEglContextTracker
+{
+public:
+    static void ref() { contexts.ref(); }
+    static void deref() {
+        if (!contexts.deref()) {
+            eglTerminate(QEglContext::display());
+            displayOpen = 0;
+        }
+    }
+    static void setDisplayOpened() { displayOpen = 1; }
+    static bool displayOpened() { return displayOpen; }
+
+private:
+    static QBasicAtomicInt contexts;
+    static QBasicAtomicInt displayOpen;
+};
+
+QBasicAtomicInt QEglContextTracker::contexts = Q_BASIC_ATOMIC_INITIALIZER(0);
+QBasicAtomicInt QEglContextTracker::displayOpen = Q_BASIC_ATOMIC_INITIALIZER(0);
 
 // Current GL and VG contexts.  These are used to determine if
@@ -55 +84 @@
 static QEglContext * volatile currentVGContext = 0;
 
+EGLDisplay QEglContext::dpy = EGL_NO_DISPLAY;
+
 QEglContext::QEglContext()
     : apiType(QEgl::OpenGL)
-    , dpy(EGL_NO_DISPLAY)
     , ctx(EGL_NO_CONTEXT)
     , cfg(0)
@@ -65 +95 @@
     , sharing(false)
 {
+    QEglContextTracker::ref();
 }
 
 QEglContext::~QEglContext()
 {
-    destroy();
+    destroyContext();
 
     if (currentGLContext == this)
@@ -75 +106 @@
     if (currentVGContext == this)
         currentVGContext = 0;
+    QEglContextTracker::deref();
 }
 
@@ -85 +117 @@
 {
     return current;
-}
-
-// Open the EGL display associated with "device".
-bool QEglContext::openDisplay(QPaintDevice *device)
-{
-    if (dpy == EGL_NO_DISPLAY)
-        dpy = defaultDisplay(device);
-    return (dpy != EGL_NO_DISPLAY);
 }
 
@@ -103 +127 @@
         // Get the number of matching configurations for this set of properties.
         EGLint matching = 0;
-        if (!eglChooseConfig(dpy, props.properties(), 0, 0, &matching) || !matching)
+        if (!eglChooseConfig(display(), props.properties(), 0, 0, &matching) || !matching)
             continue;
 
@@ -109 +133 @@
         // matching configuration.
         if (match == QEgl::BestPixelFormat) {
-            eglChooseConfig(dpy, props.properties(), &cfg, 1, &matching);
+            eglChooseConfig(display(), props.properties(), &cfg, 1, &matching);
             if (matching < 1)
                 continue;
@@ -119 +143 @@
         EGLint size = matching;
         EGLConfig *configs = new EGLConfig [size];
-        eglChooseConfig(dpy, props.properties(), configs, size, &matching);
+        eglChooseConfig(display(), props.properties(), configs, size, &matching);
         for (EGLint index = 0; index < size; ++index) {
             EGLint red, green, blue, alpha;
-            eglGetConfigAttrib(dpy, configs[index], EGL_RED_SIZE, &red);
-            eglGetConfigAttrib(dpy, configs[index], EGL_GREEN_SIZE, &green);
-            eglGetConfigAttrib(dpy, configs[index], EGL_BLUE_SIZE, &blue);
-            eglGetConfigAttrib(dpy, configs[index], EGL_ALPHA_SIZE, &alpha);
+            eglGetConfigAttrib(display(), configs[index], EGL_RED_SIZE, &red);
+            eglGetConfigAttrib(display(), configs[index], EGL_GREEN_SIZE, &green);
+            eglGetConfigAttrib(display(), configs[index], EGL_BLUE_SIZE, &blue);
+            eglGetConfigAttrib(display(), configs[index], EGL_ALPHA_SIZE, &alpha);
             if (red == props.value(EGL_RED_SIZE) &&
                     green == props.value(EGL_GREEN_SIZE) &&
@@ -180 +204 @@
         shareContext = 0;
     if (shareContext) {
-        ctx = eglCreateContext(dpy, cfg, shareContext->ctx, contextProps.properties());
+        ctx = eglCreateContext(display(), cfg, shareContext->ctx, contextProps.properties());
         if (ctx == EGL_NO_CONTEXT) {
             qWarning() << "QEglContext::createContext(): Could not share context:" << errorString(eglGetError());
@@ -189 +213 @@
     }
     if (ctx == EGL_NO_CONTEXT) {
-        ctx = eglCreateContext(dpy, cfg, 0, contextProps.properties());
+        ctx = eglCreateContext(display(), cfg, 0, contextProps.properties());
         if (ctx == EGL_NO_CONTEXT) {
             qWarning() << "QEglContext::createContext(): Unable to create EGL context:" << errorString(eglGetError());
@@ -205 +229 @@
         if (surface == currentSurface)
             doneCurrent();
-        eglDestroySurface(dpy, surface);
+        eglDestroySurface(display(), surface);
     }
 }
 
 // Destroy the context.  Note: this does not destroy the surface.
-void QEglContext::destroy()
+void QEglContext::destroyContext()
 {
     if (ctx != EGL_NO_CONTEXT && ownsContext)
-        eglDestroyContext(dpy, ctx);
-    dpy = EGL_NO_DISPLAY;
+        eglDestroyContext(display(), ctx);
     ctx = EGL_NO_CONTEXT;
     cfg = 0;
@@ -249 +272 @@
 #endif
 
-    bool ok = eglMakeCurrent(dpy, surface, surface, ctx);
+    bool ok = eglMakeCurrent(display(), surface, surface, ctx);
     if (!ok)
         qWarning() << "QEglContext::makeCurrent():" << errorString(eglGetError());
@@ -278 +301 @@
 #endif
 
-    bool ok = eglMakeCurrent(dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+    bool ok = eglMakeCurrent(display(), EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
     if (!ok)
         qWarning() << "QEglContext::doneCurrent():" << errorString(eglGetError());
@@ -300 +323 @@
         return false;
 
-    bool ok = eglSwapBuffers(dpy, surface);
+    bool ok = eglSwapBuffers(display(), surface);
     if (!ok)
         qWarning() << "QEglContext::swapBuffers():" << errorString(eglGetError());
@@ -339 +362 @@
 bool QEglContext::configAttrib(int name, EGLint *value) const
 {
-    return eglGetConfigAttrib(dpy, cfg, name, value);
+    return eglGetConfigAttrib(display(), cfg, name, value);
+}
+
+void QEglContext::clearError()
+{
+    eglGetError();
+}
+
+EGLint QEglContext::error()
+{
+    return eglGetError();
 }
 
@@ -351 +384 @@
     for (int name = 0x3020; name <= 0x304F; ++name) {
         EGLint value;
-        if (name != EGL_NONE && eglGetConfigAttrib(dpy, cfg, name, &value))
+        if (name != EGL_NONE && eglGetConfigAttrib(display(), cfg, name, &value))
             props.setValue(name, value);
     }
@@ -358 +391 @@
 }
 
-// Initialize and return the default display.
-EGLDisplay QEglContext::defaultDisplay(QPaintDevice *device)
-{
-    static EGLDisplay dpy = EGL_NO_DISPLAY;
-    if (dpy == EGL_NO_DISPLAY) {
-        dpy = getDisplay(device);
+EGLDisplay QEglContext::display()
+{
+    if (!QEglContextTracker::displayOpened()) {
+        dpy = eglGetDisplay(nativeDisplay());
+        QEglContextTracker::setDisplayOpened();
         if (dpy == EGL_NO_DISPLAY) {
-            qWarning() << "QEglContext::defaultDisplay(): Cannot open EGL display";
+            qWarning("QEglContext::display(): Falling back to EGL_DEFAULT_DISPLAY");
+            dpy = eglGetDisplay(EGLNativeDisplayType(EGL_DEFAULT_DISPLAY));
+        }
+        if (dpy == EGL_NO_DISPLAY) {
+            qWarning("QEglContext::display(): Can't even open the default display");
             return EGL_NO_DISPLAY;
         }
+
         if (!eglInitialize(dpy, NULL, NULL)) {
-            qWarning() << "QEglContext::defaultDisplay(): Cannot initialize EGL display:" << errorString(eglGetError());
+            qWarning() << "QEglContext::display(): Cannot initialize EGL display:" << errorString(eglGetError());
             return EGL_NO_DISPLAY;
         }
-#ifdef EGL_OPENGL_ES_API
-        eglBindAPI(EGL_OPENGL_ES_API);
-#endif
-    }
+    }
+
     return dpy;
 }
+
+#if !defined(Q_WS_X11) && !defined(Q_WS_WINCE) // WinCE & X11 implement this properly
+EGLNativeDisplayType QEglContext::nativeDisplay()
+{
+    return EGL_DEFAULT_DISPLAY;
+}
+#endif
 
 // Return the error string associated with a specific code.
@@ -411 +453 @@
     QEglProperties props;
     EGLint count = 0;
-    if (!eglGetConfigs(dpy, 0, 0, &count) || count < 1)
+    if (!eglGetConfigs(display(), 0, 0, &count) || count < 1)
         return;
     EGLConfig *configs = new EGLConfig [count];
-    eglGetConfigs(dpy, configs, count, &count);
+    eglGetConfigs(display(), configs, count, &count);
     for (EGLint index = 0; index < count; ++index) {
         props = configProperties(configs[index]);
@@ -424 +466 @@
 QString QEglContext::extensions()
 {
-    const char* exts = eglQueryString(QEglContext::defaultDisplay(0), EGL_EXTENSIONS);
+    const char* exts = eglQueryString(QEglContext::display(), EGL_EXTENSIONS);
     return QString(QLatin1String(exts));
 }
@@ -432 +474 @@
     QList<QByteArray> extensions =
         QByteArray(reinterpret_cast<const char *>
-            (eglQueryString(QEglContext::defaultDisplay(0), EGL_EXTENSIONS))).split(' ');
+            (eglQueryString(QEglContext::display(), EGL_EXTENSIONS))).split(' ');
     return extensions.contains(extensionName);
 }