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#279 Bind offscreen frame buffer before reading pixel data

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This commit is contained in:
Magne Sjaastad 2016-11-01 10:12:11 +01:00
parent 5f484abc2d
commit cae5c42f68
1 changed files with 13 additions and 3 deletions
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16
Fwk/AppFwk/cafViewer/cafViewer.cpp
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@ -498,12 +498,16 @@ void caf::Viewer::resizeGL(int width, int height)
{
m_offscreenFbo->resizeAttachedBuffers(width, height);
m_quadRendering->camera()->viewport()->set(0, 0, width, height);
m_offscreenViewportWidth = width;
m_offscreenViewportHeight = height;
}
if (m_quadRendering.notNull())
{
m_quadRendering->camera()->viewport()->set(0, 0, width, height);
}
updateCamera(width, height);
}
@ -814,13 +818,17 @@ bool caf::Viewer::isShadersSupported()
//--------------------------------------------------------------------------------------------------
QImage caf::Viewer::snapshotImage()
{
QImage image;
if (m_offscreenFbo.notNull() && m_offscreenViewportWidth > 0 && m_offscreenViewportHeight > 0)
{
cvf::ref<cvf::OpenGLContext> myOglContext = cvfOpenGLContext();
// TODO: Is this required???
//m_offscreenFbo->bind(myOglContext.p());
m_offscreenFbo->bind(myOglContext.p());
// TODO: Consider refactor this code
// Creating a QImage from the bits in current frame buffer can be done by
// this->grabFrameBuffer()
GLint iOldPackAlignment = 0;
glGetIntegerv(GL_PACK_ALIGNMENT, &iOldPackAlignment);
@ -835,6 +843,8 @@ QImage caf::Viewer::snapshotImage()
glPixelStorei(GL_PACK_ALIGNMENT, iOldPackAlignment);
CVF_CHECK_OGL(myOglContext.p());
cvf::FramebufferObject::useDefaultWindowFramebuffer(myOglContext.p());
cvf::TextureImage texImage;
texImage.setFromRgb(arr.ptr(), m_offscreenViewportWidth, m_offscreenViewportHeight);