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-rw-r--r--src/opengl/qwindowsurface_gl.cpp114
1 files changed, 64 insertions, 50 deletions
diff --git a/src/opengl/qwindowsurface_gl.cpp b/src/opengl/qwindowsurface_gl.cpp
index 6fce3e3dab..a3422b5120 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;
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-12 01:28:28 +0000