54 lines
1.1 KiB
C++
54 lines
1.1 KiB
C++
#include <mbgl/gl/headless_backend.hpp>
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#include <QApplication>
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#include <QGLContext>
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#include <QGLWidget>
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#if QT_VERSION >= 0x050000
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#include <QOpenGLContext>
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#endif
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#include <cassert>
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namespace mbgl {
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struct QtImpl : public HeadlessBackend::Impl {
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void activateContext() final {
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widget.makeCurrent();
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}
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void deactivateContext() final {
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widget.doneCurrent();
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}
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QGLWidget widget;
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};
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gl::glProc HeadlessBackend::initializeExtension(const char* name) {
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#if QT_VERSION >= 0x050000
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QOpenGLContext* thisContext = QOpenGLContext::currentContext();
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return thisContext->getProcAddress(name);
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#else
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const QGLContext* thisContext = QGLContext::currentContext();
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return reinterpret_cast<mbgl::gl::glProc>(thisContext->getProcAddress(name));
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#endif
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}
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bool HeadlessBackend::hasDisplay() {
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return true;
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};
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void HeadlessBackend::createContext() {
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assert(!hasContext());
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static const char* argv[] = { "mbgl" };
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static int argc = 1;
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static auto* app = new QApplication(argc, const_cast<char**>(argv));
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Q_UNUSED(app);
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impl.reset(new QtImpl);
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}
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} // namespace mbgl
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