Changeset 651 for trunk/src/opengl/qgl.cpp

Timestamp:

Mar 8, 2010, 12:52:58 PM (15 years ago)

Author:

Dmitry A. Kuminov

Message:

trunk: Merged in qt 4.6.2 sources.

Location:

trunk

Files:

• . (modified) (1 prop)
• src/opengl/qgl.cpp (modified) (32 diffs)

trunk/src/opengl/qgl.cpp

@@ -1 +1 @@
 /****************************************************************************
 **
-** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
@@ -125 +125 @@
 Q_GLOBAL_STATIC(QGLDefaultOverlayFormat, defaultOverlayFormatInstance)
 
-QGLExtensions::Extensions QGLExtensions::glExtensions = 0;
-bool QGLExtensions::nvidiaFboNeedsFinish = false;
-
 Q_GLOBAL_STATIC(QGLSignalProxy, theSignalProxy)
 QGLSignalProxy *QGLSignalProxy::instance()
@@ -155 +152 @@
         static bool mac_x1600_check_done = false;
         if (!mac_x1600_check_done) {
-            QGLWidget *tmp = 0;
-            if (!QGLContext::currentContext()) {
-                tmp = new QGLWidget();
-                tmp->makeCurrent();
-            }
+            QGLTemporaryContext *tmp = 0;
+            if (!QGLContext::currentContext())
+                tmp = new QGLTemporaryContext();
             if (strstr((char *) glGetString(GL_RENDERER), "X1600"))
                 engineType = QPaintEngine::OpenGL;
@@ -179 +174 @@
             // use GL 2.0.
             if ((QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_2_0)
-                && (QGLExtensions::glExtensions & QGLExtensions::FragmentShader)
+                && (QGLExtensions::glExtensions() & QGLExtensions::FragmentShader)
                 && qgetenv("QT_GL_USE_OPENGL1ENGINE").isEmpty())
                 engineType = QPaintEngine::OpenGL2;
@@ -1251 +1246 @@
     static OpenGLVersionFlags defaultVersionFlags = OpenGL_Version_None;
     QGLContext *currentCtx = const_cast<QGLContext *>(QGLContext::currentContext());
-    QGLWidget *dummy = 0;
+    QGLTemporaryContext *tmpContext = 0;
 
     if (currentCtx && currentCtx->d_func()->version_flags_cached)
@@ -1262 +1257 @@
             if (!hasOpenGL())
                 return defaultVersionFlags;
-            dummy = new QGLWidget;
-            dummy->makeCurrent(); // glGetString() needs a current context
+            tmpContext = new QGLTemporaryContext;
             cachedDefault = true;
         }
@@ -1274 +1268 @@
         currentCtx->d_func()->version_flags = versionFlags;
     }
-    if (dummy) {
+    if (tmpContext) {
         defaultVersionFlags = versionFlags;
-        delete dummy;
+        delete tmpContext;
     }
 
@@ -1437 +1431 @@
 }
 
+const QGLContext *qt_gl_transfer_context(const QGLContext *ctx)
+{
+    if (!ctx)
+        return 0;
+    QList<const QGLContext *> shares
+        (QGLContextPrivate::contextGroup(ctx)->shares());
+    if (shares.size() >= 2)
+        return (ctx == shares.at(0)) ? shares.at(1) : shares.at(0);
+    else
+        return 0;
+}
+
 QGLContextPrivate::~QGLContextPrivate()
 {
@@ -1482 +1488 @@
     version_flags_cached = false;
     version_flags = QGLFormat::OpenGL_Version_None;
+    extension_flags_cached = false;
+    extension_flags = 0;
     current_fbo = 0;
     default_fbo = 0;
     active_engine = 0;
+    for (int i = 0; i < QT_GL_VERTEX_ARRAY_TRACKED_COUNT; ++i)
+        vertexAttributeArraysEnabledState[i] = false;
 }
 
@@ -1542 +1552 @@
 QImage qt_gl_read_texture(const QSize &size, bool alpha_format, bool include_alpha)
 {
-    QImage img(size, alpha_format ? QImage::Format_ARGB32 : QImage::Format_RGB32);
+    QImage img(size, alpha_format ? QImage::Format_ARGB32_Premultiplied : QImage::Format_RGB32);
     int w = size.width();
     int h = size.height();
@@ -1581 +1591 @@
     qt_gl_texture_cache = this;
 
-    QImagePixmapCleanupHooks::instance()->addPixmapModificationHook(cleanupTextures);
-#ifdef Q_WS_X11
-    QImagePixmapCleanupHooks::instance()->addPixmapDestructionHook(cleanupPixmapSurfaces);
-#endif
+    QImagePixmapCleanupHooks::instance()->addPixmapDataModificationHook(cleanupTextures);
+    QImagePixmapCleanupHooks::instance()->addPixmapDataDestructionHook(cleanupBeforePixmapDestruction);
     QImagePixmapCleanupHooks::instance()->addImageHook(imageCleanupHook);
 }
@@ -1592 +1600 @@
     qt_gl_texture_cache = 0;
 
-    QImagePixmapCleanupHooks::instance()->removePixmapModificationHook(cleanupTextures);
-#ifdef Q_WS_X11
-    QImagePixmapCleanupHooks::instance()->removePixmapDestructionHook(cleanupPixmapSurfaces);
-#endif
+    QImagePixmapCleanupHooks::instance()->removePixmapDataModificationHook(cleanupTextures);
+    QImagePixmapCleanupHooks::instance()->removePixmapDataDestructionHook(cleanupBeforePixmapDestruction);
     QImagePixmapCleanupHooks::instance()->removeImageHook(imageCleanupHook);
 }
@@ -1663 +1669 @@
 
 
-void QGLTextureCache::cleanupTextures(QPixmap* pixmap)
+void QGLTextureCache::cleanupTextures(QPixmapData* pmd)
 {
     // ### remove when the GL texture cache becomes thread-safe
     if (qApp->thread() == QThread::currentThread()) {
-        const qint64 cacheKey = pixmap->cacheKey();
+        const qint64 cacheKey = pmd->cacheKey();
         QGLTexture *texture = instance()->getTexture(cacheKey);
         if (texture && texture->options & QGLContext::MemoryManagedBindOption)
@@ -1674 +1680 @@
 }
 
+void QGLTextureCache::cleanupBeforePixmapDestruction(QPixmapData* pmd)
+{
+    // Remove any bound textures first:
+    cleanupTextures(pmd);
+    Q_ASSERT(instance()->getTexture(pmd->cacheKey()) == 0);
+
 #if defined(Q_WS_X11)
-void QGLTextureCache::cleanupPixmapSurfaces(QPixmap* pixmap)
-{
-    // Remove any bound textures first:
-    cleanupTextures(pixmap);
-
-    QPixmapData *pd = pixmap->data_ptr().data();
-    if (pd->classId() == QPixmapData::X11Class) {
-        Q_ASSERT(pd->ref == 1); // Make sure reference counting isn't broken
-        QGLContextPrivate::destroyGlSurfaceForPixmap(pd);
-    }
-}
-#endif
+    if (pmd->classId() == QPixmapData::X11Class) {
+        Q_ASSERT(pmd->ref == 0); // Make sure reference counting isn't broken
+        QGLContextPrivate::destroyGlSurfaceForPixmap(pmd);
+    }
+#endif
+}
 
 void QGLTextureCache::deleteIfEmpty()
@@ -1730 +1736 @@
 #endif
 
-Q_GLOBAL_STATIC(QGLShareRegister, _qgl_share_reg)
-Q_OPENGL_EXPORT QGLShareRegister* qgl_share_reg()
-{
-    return _qgl_share_reg();
-}
-
 /*!
     \class QGLContext
@@ -1874 +1874 @@
 {
 }
+
+#define ctx q_ptr
+void QGLContextPrivate::setVertexAttribArrayEnabled(int arrayIndex, bool enabled)
+{
+    Q_ASSERT(arrayIndex < QT_GL_VERTEX_ARRAY_TRACKED_COUNT);
+    Q_ASSERT(glEnableVertexAttribArray);
+
+    if (vertexAttributeArraysEnabledState[arrayIndex] && !enabled)
+        glDisableVertexAttribArray(arrayIndex);
+
+    if (!vertexAttributeArraysEnabledState[arrayIndex] && enabled)
+        glEnableVertexAttribArray(arrayIndex);
+
+    vertexAttributeArraysEnabledState[arrayIndex] = enabled;
+}
+
+void QGLContextPrivate::syncGlState()
+{
+    Q_ASSERT(glEnableVertexAttribArray);
+    for (int i = 0; i < QT_GL_VERTEX_ARRAY_TRACKED_COUNT; ++i) {
+        if (vertexAttributeArraysEnabledState[i])
+            glEnableVertexAttribArray(i);
+        else
+            glDisableVertexAttribArray(i);
+    }
+
+}
+#undef ctx
+
 
 /*!
@@ -2111 +2140 @@
 
     QImage img = image;
-    if (!(QGLExtensions::glExtensions & QGLExtensions::NPOTTextures)
+    if (!(QGLExtensions::glExtensions() & QGLExtensions::NPOTTextures)
         && !(QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_ES_Version_2_0)
         && (target == GL_TEXTURE_2D && (tx_w != image.width() || tx_h != image.height())))
@@ -2133 +2162 @@
 #endif
     if (glFormat.directRendering()
-        && (QGLExtensions::glExtensions & QGLExtensions::GenerateMipmap)
+        && (QGLExtensions::glExtensions() & QGLExtensions::GenerateMipmap)
         && target == GL_TEXTURE_2D
         && (options & QGLContext::MipmapBindOption))
@@ -2161 +2190 @@
     GLenum externalFormat;
     GLuint pixel_type;
-    if (QGLExtensions::glExtensions & QGLExtensions::BGRATextureFormat) {
+    if (QGLExtensions::glExtensions() & QGLExtensions::BGRATextureFormat) {
         externalFormat = GL_BGRA;
-        pixel_type = GL_UNSIGNED_INT_8_8_8_8_REV;
+        if (QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_1_2)
+            pixel_type = GL_UNSIGNED_INT_8_8_8_8_REV;
+        else
+            pixel_type = GL_UNSIGNED_BYTE;
     } else {
         externalFormat = GL_RGBA;
@@ -2242 +2274 @@
     }
 #ifdef QT_OPENGL_ES
-    // OpenGL/ES requires that the internal and external formats be identical.
-    // This is typically used to convert GL_RGBA into GL_BGRA.
-    // Also, we need to use GL_UNSIGNED_BYTE when the format is GL_BGRA.
+    // OpenGL/ES requires that the internal and external formats be
+    // identical.
     internalFormat = externalFormat;
-    if (pixel_type == GL_UNSIGNED_INT_8_8_8_8_REV)
-        pixel_type = GL_UNSIGNED_BYTE;
 #endif
 #ifdef QGL_BIND_TEXTURE_DEBUG
@@ -2955 +2984 @@
     }
     if (d->sharing)  // ok, we managed to share
-        qgl_share_reg()->addShare(this, shareContext);
+        QGLContextGroup::addShare(this, shareContext);
     return d->valid;
 }
@@ -4361 +4390 @@
    text is drawn.
 
+   \note This function can only be used inside a
+   QPainter::beginNativePainting()/QPainter::endNativePainting() block
+   if the default OpenGL paint engine is QPaintEngine::OpenGL. To make
+   QPaintEngine::OpenGL the default GL engine, call
+   QGL::setPreferredPaintEngine(QPaintEngine::OpenGL) before the
+   QApplication constructor.
+
    \l{Overpainting Example}{Overpaint} with QPainter::drawText() instead.
 */
@@ -4832 +4868 @@
 #endif // QT3_SUPPORT
 
-void QGLExtensions::init_extensions()
+/*
+    Returns the GL extensions for the current context.
+*/
+QGLExtensions::Extensions QGLExtensions::currentContextExtensions()
 {
     QGLExtensionMatcher extensions(reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS)));
+    Extensions glExtensions;
 
     if (extensions.match("GL_ARB_texture_rectangle"))
@@ -4895 +4935 @@
     if (extensions.match("GL_EXT_bgra"))
         glExtensions |= BGRATextureFormat;
+
+    return glExtensions;
+}
+
+/*
+    Returns the GL extensions for the current QGLContext. If there is no
+    current QGLContext, a default context will be created and the extensions
+    for that context will be returned instead.
+*/
+QGLExtensions::Extensions QGLExtensions::glExtensions()
+{
+    QGLTemporaryContext *tmpContext = 0;
+    static bool cachedDefault = false;
+    static Extensions defaultExtensions = 0;
+    QGLContext *currentCtx = const_cast<QGLContext *>(QGLContext::currentContext());
+
+    if (currentCtx && currentCtx->d_func()->extension_flags_cached)
+        return currentCtx->d_func()->extension_flags;
+
+    if (!currentCtx) {
+        if (cachedDefault) {
+            return defaultExtensions;
+        } else {
+            tmpContext = new QGLTemporaryContext;
+            cachedDefault = true;
+        }
+    }
+
+    Extensions extensionFlags = currentContextExtensions();
+    if (currentCtx) {
+        currentCtx->d_func()->extension_flags_cached = true;
+        currentCtx->d_func()->extension_flags = extensionFlags;
+    } else {
+        defaultExtensions = extensionFlags;
+    }
+
+    if (tmpContext)
+        delete tmpContext;
+
+    return extensionFlags;
 }
 
@@ -4906 +4986 @@
     glDevice.setWidget(q);
 
-    QGLExtensions::init();
     glcx = 0;
     autoSwap = true;
@@ -4916 +4995 @@
     if (!glcx)
         glcx = new QGLContext(QGLFormat::defaultFormat(), q);
-
-    q->setAttribute(Qt::WA_NoSystemBackground);
 }
 
@@ -4941 +5018 @@
 #endif
 
-void QGLShareRegister::addShare(const QGLContext *context, const QGLContext *share) {
+void QGLContextGroup::addShare(const QGLContext *context, const QGLContext *share) {
     Q_ASSERT(context && share);
     if (context->d_ptr->group == share->d_ptr->group)
@@ -4962 +5039 @@
 }
 
-QList<const QGLContext *> QGLShareRegister::shares(const QGLContext *context) {
-    return context->d_ptr->group->m_shares;
-}
-
-void QGLShareRegister::removeShare(const QGLContext *context) {
+void QGLContextGroup::removeShare(const QGLContext *context) {
     // Remove the context from the group.
     QGLContextGroup *group = context->d_ptr->group;
@@ -5161 +5234 @@
 #if !defined(QT_OPENGL_ES)
     if (!glCompressedTexImage2D) {
-        if (!(QGLExtensions::glExtensions & QGLExtensions::TextureCompression)) {
+        if (!(QGLExtensions::glExtensions() & QGLExtensions::TextureCompression)) {
             qWarning("QGLContext::bindTexture(): The GL implementation does "
                      "not support texture compression extensions.");
@@ -5200 +5273 @@
 
     // Bail out if the necessary extension is not present.
-    if (!(QGLExtensions::glExtensions & QGLExtensions::DDSTextureCompression)) {
+    if (!(QGLExtensions::glExtensions() & QGLExtensions::DDSTextureCompression)) {
         qWarning("QGLContext::bindTexture(): DDS texture compression is not supported.");
         return QSize();
@@ -5310 +5383 @@
     // Bail out if the necessary extension is not present.
     if (textureFormat == GL_ETC1_RGB8_OES) {
-        if (!(QGLExtensions::glExtensions &
+        if (!(QGLExtensions::glExtensions() &
                     QGLExtensions::ETC1TextureCompression)) {
             qWarning("QGLContext::bindTexture(): ETC1 texture compression is not supported.");
@@ -5316 +5389 @@
         }
     } else {
-        if (!(QGLExtensions::glExtensions &
+        if (!(QGLExtensions::glExtensions() &
                     QGLExtensions::PVRTCTextureCompression)) {
             qWarning("QGLContext::bindTexture(): PVRTC texture compression is not supported.");