53 lines
1.2 KiB
C++
53 lines
1.2 KiB
C++
#include <mbgl/gl/headless_display.hpp>
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#include <OpenGL/OpenGL.h>
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#include <stdexcept>
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#include <string>
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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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CGLPixelFormatObj pixelFormat = nullptr;
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};
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HeadlessDisplay::Impl::Impl() {
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// TODO: test if OpenGL 4.1 with GL_ARB_ES2_compatibility is supported
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// If it is, use kCGLOGLPVersion_3_2_Core and enable that extension.
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CGLPixelFormatAttribute attributes[] = {
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kCGLPFAOpenGLProfile,
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static_cast<CGLPixelFormatAttribute>(kCGLOGLPVersion_Legacy),
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static_cast<CGLPixelFormatAttribute>(0)
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};
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GLint num;
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CGLError error = CGLChoosePixelFormat(attributes, &pixelFormat, &num);
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if (error != kCGLNoError) {
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throw std::runtime_error(std::string("Error choosing pixel format:") + CGLErrorString(error) + "\n");
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}
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if (num <= 0) {
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throw std::runtime_error("No pixel formats found.");
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}
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}
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HeadlessDisplay::Impl::~Impl() {
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CGLDestroyPixelFormat(pixelFormat);
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}
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template <>
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CGLPixelFormatObj HeadlessDisplay::attribute() const {
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return impl->pixelFormat;
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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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