BSD licensing should be used for QtOpenGLExtensions instead of LGPL as
it is a static library that is linked into applications. Using LGPL
would impose additional requirements for application developers to
provide object files to end users to be able to relink the application
with a modified or updated QtOpenGLExtensions static library.
Task-number: QTBUG-29918
Change-Id: I0bb80f8ba5158be0a71fe4c5e1c37787ce21337d
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
This commit fixes glTexImage3D to be non-deprecated. This function is
incorrectly marked as deprecated in gl.spec. For more info see
https://www.khronos.org/bugzilla/show_bug.cgi?id=449
Change-Id: Ic9021b184a10d1b162158a3476b7272f4c6917fd
Reviewed-by: James Turner <james.turner@kdab.com>
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>
This ensures that glgen outputs exactly what is included in
src/gui/opengl/qopenglversionfunctions.*
src/gui/opengl/qopenglfunctions_*
src/openglextensions/*
Change-Id: I7d41d9fc2bf6e5fedf11f58872c079339dac3649
Reviewed-by: James Turner <james.turner@kdab.com>
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>
This patch provides a code generator that can be executed offline
to generate a few classes for enhancing Qt's support for OpenGL.
The generated code effectively provides all the benefits of GLEW
in its multi-context form but for all platforms and even for ES2.
The code generator takes as input the official Khronos gl.spec
specification and gl.tm typemap files. These provide all of the
information required to create the OpenGL Desktop related classes.
The classes for ES2 are hand-crafted as no similar spec files have
been published.
The generated code supports all OpenGL extensions listed in the
Khronos registry for both Desktop OpenGL and ES 2.
There is a helper factory class generated which are used by
QOpenGLContext::versionFunctions().
This allows code like the following to be written:
QOpenGLFunctions_3_3_Core* m_funcs = 0;
m_funcs = m_context->versionFunctions<QOpenGLFunctions_3_3_Core>();
if (!m_funcs) {
qWarning() << "Could not obtain required OpenGL context version";
exit(1);
}
if (!m_funcs->initializeOpenGLFunctions()) {
qWarning() << "Failed to resolve entry points";
exit(2);
}
// Get an extension object
QOpenGLExtension_ARB_draw_buffers* ext = 0;
if (m_context->hasExtension("GL_ARB_draw_buffers")) {
ext = new QOpenGLExtension_ARB_draw_buffers();
ext->initializeOpenGLFunctions(m_context);
}
Such usage will allow much easier and rigorous use of features in
modern OpenGL and extensions both in Qt itself and by users of Qt.
Follow-up patches will import the generated files and then use
these to reinstate OpenGL geometry shaders, add tessellation
shaders, and other OpenGL constructs.
Change-Id: Id0172e8aa1fd57eb4e6979a96d10fb5a34826426
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>
Reviewed-by: James Turner <james.turner@kdab.com>
