GLuint QGLPixelBuffer::generateDynamicTexture() const
{
Q_D(const QGLPixelBuffer);
if (!d->fbo)
return 0;
if (d->fbo->format().samples() > 0
&& QOpenGLExtensions(QOpenGLContext::currentContext())
.hasOpenGLExtension(QOpenGLExtensions::FramebufferBlit))
{
if (!d->blit_fbo)
const_cast<QOpenGLFramebufferObject *&>(d->blit_fbo) = new QOpenGLFramebufferObject(d->req_size);
} else {
return d->fbo->texture();
}
GLuint texture;
QOpenGLFunctions *funcs = QOpenGLContext::currentContext()->functions();
funcs->glGenTextures(1, &texture);
funcs->glBindTexture(GL_TEXTURE_2D, texture);
funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
funcs->glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, d->req_size.width(), d->req_size.height(), 0,
GL_RGBA, GL_UNSIGNED_BYTE, 0);
return texture;
}
/*!
\fn bool QOpenGLFramebufferObject::hasOpenGLFramebufferBlit()
Returns \c true if the OpenGL \c{GL_EXT_framebuffer_blit} extension
is present on this system; otherwise returns \c false.
\sa blitFramebuffer()
*/
bool QOpenGLFramebufferObject::hasOpenGLFramebufferBlit()
{
return QOpenGLExtensions(QOpenGLContext::currentContext()).hasOpenGLExtension(QOpenGLExtensions::FramebufferBlit);
}
