diff options
Diffstat (limited to 'src/gui/opengl/qopenglframebufferobject.cpp')
| -rw-r--r-- | src/gui/opengl/qopenglframebufferobject.cpp | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/gui/opengl/qopenglframebufferobject.cpp b/src/gui/opengl/qopenglframebufferobject.cpp index 7d91d2c497..cd6468cccd 100644 --- a/src/gui/opengl/qopenglframebufferobject.cpp +++ b/src/gui/opengl/qopenglframebufferobject.cpp @@ -436,9 +436,9 @@ void QOpenGLFramebufferObjectPrivate::init(QOpenGLFramebufferObject *, const QSi samples = qBound(0, int(samples), int(maxSamples)); #endif + requestedSamples = samples; size = sz; target = texture_target; - // texture dimensions QT_RESET_GLERROR(); // reset error state GLuint fbo = 0; @@ -472,6 +472,9 @@ void QOpenGLFramebufferObjectPrivate::init(QOpenGLFramebufferObject *, const QSi valid = checkFramebufferStatus(ctx); if (valid) { + // Query the actual number of samples. This can be greater than the requested + // value since the typically supported values are 0, 4, 8, ..., and the + // requests are mapped to the next supported value. funcs.glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_SAMPLES, &samples); color_buffer_guard = new QOpenGLSharedResourceGuard(ctx, color_buffer, freeRenderbufferFunc); } @@ -542,7 +545,10 @@ void QOpenGLFramebufferObjectPrivate::initTexture(GLenum target, GLenum internal void QOpenGLFramebufferObjectPrivate::initAttachments(QOpenGLContext *ctx, QOpenGLFramebufferObject::Attachment attachment) { - int samples = format.samples(); + // Use the same sample count for all attachments. format.samples() already contains + // the actual number of samples for the color attachment and is not suitable. Use + // requestedSamples instead. + const int samples = requestedSamples; // free existing attachments if (depth_buffer_guard) { |