diff options
| -rw-r--r-- | src/opengl/qwindowsurface_gl.cpp | 114 |
1 files changed, 64 insertions, 50 deletions
diff --git a/src/opengl/qwindowsurface_gl.cpp b/src/opengl/qwindowsurface_gl.cpp index 6fce3e3..a3422b5 100644 --- a/src/opengl/qwindowsurface_gl.cpp +++ b/src/opengl/qwindowsurface_gl.cpp @@ -102,16 +102,18 @@ QGLGraphicsSystem::QGLGraphicsSystem() int spec[16]; spec[i++] = GLX_RGBA; spec[i++] = GLX_DOUBLEBUFFER; -#if 0 - spec[i++] = GLX_DEPTH_SIZE; - spec[i++] = 8; - spec[i++] = GLX_STENCIL_SIZE; - spec[i++] = 8; - spec[i++] = GLX_SAMPLE_BUFFERS_ARB; - spec[i++] = 1; - spec[i++] = GLX_SAMPLES_ARB; - spec[i++] = 4; -#endif + + if (!qgetenv("QT_GL_SWAPBUFFER_PRESERVE").isNull()) { + spec[i++] = GLX_DEPTH_SIZE; + spec[i++] = 8; + spec[i++] = GLX_STENCIL_SIZE; + spec[i++] = 8; + spec[i++] = GLX_SAMPLE_BUFFERS_ARB; + spec[i++] = 1; + spec[i++] = GLX_SAMPLES_ARB; + spec[i++] = 4; + } + spec[i++] = XNone; XVisualInfo *vi = glXChooseVisual(X11->display, X11->defaultScreen, spec); @@ -229,6 +231,7 @@ struct QGLWindowSurfacePrivate int tried_fbo : 1; int tried_pb : 1; + int destructive_swap_buffers : 1; QGLContext *ctx; @@ -252,6 +255,7 @@ QGLWindowSurface::QGLWindowSurface(QWidget *window) d_ptr->ctx = 0; d_ptr->tried_fbo = false; d_ptr->tried_pb = false; + d_ptr->destructive_swap_buffers = qgetenv("QT_GL_SWAPBUFFER_PRESERVE").isNull(); } QGLWindowSurface::~QGLWindowSurface() @@ -342,6 +346,9 @@ void QGLWindowSurface::flush(QWidget *widget, const QRegion &rgn, const QPoint & QWidget *parent = widget->internalWinId() ? widget : widget->nativeParentWidget(); Q_ASSERT(parent); + if (!geometry().isValid()) + return; + hijackWindow(parent); QRect br = rgn.boundingRect().translated(offset); @@ -356,48 +363,50 @@ void QGLWindowSurface::flush(QWidget *widget, const QRegion &rgn, const QPoint & if (context()->format().doubleBuffer()) { #if !defined(QT_OPENGL_ES_2) - glBindTexture(target, d_ptr->tex_id); + if (d_ptr->destructive_swap_buffers) { + glBindTexture(target, d_ptr->tex_id); - QVector<QRect> rects = d_ptr->paintedRegion.rects(); - for (int i = 0; i < rects.size(); ++i) { - QRect br = rects.at(i); - if (br.isEmpty()) - continue; + QVector<QRect> rects = d_ptr->paintedRegion.rects(); + for (int i = 0; i < rects.size(); ++i) { + QRect br = rects.at(i); + if (br.isEmpty()) + continue; - const uint bottom = window()->height() - (br.y() + br.height()); - glCopyTexSubImage2D(target, 0, br.x(), bottom, br.x(), bottom, br.width(), br.height()); - } + const uint bottom = window()->height() - (br.y() + br.height()); + glCopyTexSubImage2D(target, 0, br.x(), bottom, br.x(), bottom, br.width(), br.height()); + } - glBindTexture(target, 0); + glBindTexture(target, 0); - QRegion dirtyRegion = QRegion(window()->rect()) - d_ptr->paintedRegion; + QRegion dirtyRegion = QRegion(window()->rect()) - d_ptr->paintedRegion; - if (!dirtyRegion.isEmpty()) { - context()->makeCurrent(); + if (!dirtyRegion.isEmpty()) { + context()->makeCurrent(); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); #ifndef QT_OPENGL_ES - glOrtho(0, window()->width(), window()->height(), 0, -999999, 999999); + glOrtho(0, window()->width(), window()->height(), 0, -999999, 999999); #else - glOrthof(0, window()->width(), window()->height(), 0, -999999, 999999); + glOrthof(0, window()->width(), window()->height(), 0, -999999, 999999); #endif - glViewport(0, 0, window()->width(), window()->height()); + glViewport(0, 0, window()->width(), window()->height()); - QVector<QRect> rects = dirtyRegion.rects(); - glColor4f(1, 1, 1, 1); - for (int i = 0; i < rects.size(); ++i) { - QRect rect = rects.at(i); - if (rect.isEmpty()) - continue; + QVector<QRect> rects = dirtyRegion.rects(); + glColor4f(1, 1, 1, 1); + for (int i = 0; i < rects.size(); ++i) { + QRect rect = rects.at(i); + if (rect.isEmpty()) + continue; - drawTexture(rect, d_ptr->tex_id, window()->size(), rect); + drawTexture(rect, d_ptr->tex_id, window()->size(), rect); + } } - } #endif + } d_ptr->paintedRegion = QRegion(); context()->swapBuffers(); @@ -422,7 +431,7 @@ void QGLWindowSurface::flush(QWidget *widget, const QRegion &rgn, const QPoint & } QSize size = widget->rect().size(); - if (ctx->format().doubleBuffer()) { + if (d_ptr->destructive_swap_buffers && ctx->format().doubleBuffer()) { rect = parent->rect(); br = rect.translated(wOffset); size = parent->size(); @@ -501,13 +510,16 @@ void QGLWindowSurface::updateGeometry() d_ptr->size = rect.size(); if (d_ptr->ctx) { - glBindTexture(target, d_ptr->tex_id); - glTexImage2D(target, 0, GL_RGBA, rect.width(), rect.height(), 0, GL_RGB, GL_UNSIGNED_BYTE, 0); - glBindTexture(target, 0); + if (d_ptr->destructive_swap_buffers) { + glBindTexture(target, d_ptr->tex_id); + glTexImage2D(target, 0, GL_RGBA, rect.width(), rect.height(), 0, GL_RGB, GL_UNSIGNED_BYTE, 0); + glBindTexture(target, 0); + } return; } - if ((QGLExtensions::glExtensions & QGLExtensions::FramebufferObject) + if (d_ptr->destructive_swap_buffers + && (QGLExtensions::glExtensions & QGLExtensions::FramebufferObject) #ifdef QT_OPENGL_ES_2 && (QGLExtensions::glExtensions & QGLExtensions::FramebufferBlit) #endif @@ -542,7 +554,7 @@ void QGLWindowSurface::updateGeometry() } #if !defined(QT_OPENGL_ES_2) - if (d_ptr->pb || !d_ptr->tried_pb) { + if (d_ptr->destructive_swap_buffers && (d_ptr->pb || !d_ptr->tried_pb)) { d_ptr->tried_pb = true; if (d_ptr->pb) { @@ -590,13 +602,15 @@ void QGLWindowSurface::updateGeometry() QGLContext *ctx = reinterpret_cast<QGLContext *>(window()->d_func()->extraData()->glContext); ctx->makeCurrent(); - glGenTextures(1, &d_ptr->tex_id); - glBindTexture(target, d_ptr->tex_id); - glTexImage2D(target, 0, GL_RGBA, rect.width(), rect.height(), 0, GL_RGB, GL_UNSIGNED_BYTE, 0); + if (d_ptr->destructive_swap_buffers) { + glGenTextures(1, &d_ptr->tex_id); + glBindTexture(target, d_ptr->tex_id); + glTexImage2D(target, 0, GL_RGBA, rect.width(), rect.height(), 0, GL_RGB, GL_UNSIGNED_BYTE, 0); - glTexParameterf(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - glTexParameterf(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glBindTexture(target, 0); + glTexParameterf(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glTexParameterf(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glBindTexture(target, 0); + } qDebug() << "QGLWindowSurface: Using plain widget as window surface" << this;; d_ptr->ctx = ctx; |