6fcac0f580
We need a surface to activate a context. Some implementation don't seem to error when passing EGL_NO_SURFACE, but it doesn't seem standards compliant.
66 lines
1.5 KiB
C++
66 lines
1.5 KiB
C++
#include <mbgl/gl/headless_display.hpp>
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#include <mbgl/util/logging.hpp>
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#include <mbgl/util/string.hpp>
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#include <EGL/egl.h>
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namespace mbgl {
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class HeadlessDisplay::Impl {
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public:
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Impl();
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~Impl();
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EGLDisplay display = EGL_NO_DISPLAY;
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EGLConfig config = 0;
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};
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HeadlessDisplay::Impl::Impl() {
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display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
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if (display == EGL_NO_DISPLAY) {
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throw std::runtime_error("Failed to obtain a valid EGL display.\n");
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}
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EGLint major, minor, numConfigs;
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if (!eglInitialize(display, &major, &minor)) {
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throw std::runtime_error("eglInitialize() failed.\n");
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}
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if (!eglBindAPI(EGL_OPENGL_ES_API)) {
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mbgl::Log::Error(mbgl::Event::OpenGL, "eglBindAPI(EGL_OPENGL_ES_API) returned error %d", eglGetError());
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throw std::runtime_error("eglBindAPI() failed");
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}
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const EGLint attribs[] = {
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EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
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EGL_NONE
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};
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if (!eglChooseConfig(display, attribs, &config, 1, &numConfigs) || numConfigs != 1) {
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throw std::runtime_error("Failed to choose ARGB config.\n");
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}
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}
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HeadlessDisplay::Impl::~Impl() {
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eglTerminate(display);
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}
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template <>
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EGLDisplay HeadlessDisplay::attribute() const {
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return impl->display;
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}
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template <>
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EGLConfig& HeadlessDisplay::attribute() const {
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return impl->config;
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}
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HeadlessDisplay::HeadlessDisplay()
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: impl(std::make_unique<Impl>()) {
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}
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HeadlessDisplay::~HeadlessDisplay() {
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}
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} // namespace mbgl
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