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#include <mbgl/platform/default/headless_display.hpp>
#if MBGL_USE_EGL
#include <mbgl/util/string.hpp>
#include <EGL/egl.h>
#include <fcntl.h>
#include <gbm.h>
#include <unistd.h>
#endif
#include <cstring>
#include <stdexcept>
#include <string>
namespace mbgl {
HeadlessDisplay::HeadlessDisplay() {
#if MBGL_USE_CGL
// TODO: test if OpenGL 4.1 with GL_ARB_ES2_compatibility is supported
// If it is, use kCGLOGLPVersion_3_2_Core and enable that extension.
CGLPixelFormatAttribute attributes[] = {
kCGLPFAOpenGLProfile,
static_cast<CGLPixelFormatAttribute>(kCGLOGLPVersion_Legacy),
static_cast<CGLPixelFormatAttribute>(0)
};
GLint num;
CGLError error = CGLChoosePixelFormat(attributes, &pixelFormat, &num);
if (error != kCGLNoError) {
throw std::runtime_error(std::string("Error choosing pixel format:") + CGLErrorString(error) + "\n");
}
if (num <= 0) {
throw std::runtime_error("No pixel formats found.");
}
#endif
#if MBGL_USE_EGL
for (int i = 128; i < (128 + 16); i++) {
auto device_name = std::string{ "/dev/dri/renderD" } + mbgl::util::toString(i);
fd = open(device_name.c_str(), O_RDWR);
if (fd > 0)
break;
}
if (fd < 0) {
throw std::runtime_error("Couldn't open drm device.");
}
gbm = gbm_create_device(fd);
if (gbm == NULL) {
throw std::runtime_error("Couldn't create gbm device.");
}
dpy = eglGetDisplay(reinterpret_cast<EGLNativeDisplayType>(gbm));
if (dpy == EGL_NO_DISPLAY) {
throw std::runtime_error("eglGetDisplay() failed.");
}
EGLint major, minor, n;
if (!eglInitialize(dpy, &major, &minor)) {
throw std::runtime_error("eglInitialize() failed.");
}
const EGLint attribs[] = {
EGL_SURFACE_TYPE, EGL_DONT_CARE,
EGL_RED_SIZE, 1,
EGL_GREEN_SIZE, 1,
EGL_BLUE_SIZE, 1,
EGL_ALPHA_SIZE, 0,
EGL_DEPTH_SIZE, 1,
EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
EGL_NONE
};
if (!eglChooseConfig(dpy, attribs, &config, 1, &n) || n != 1) {
throw std::runtime_error("Failed to choose argb config.");
}
#endif
}
HeadlessDisplay::~HeadlessDisplay() {
#if MBGL_USE_CGL
CGLDestroyPixelFormat(pixelFormat);
#endif
#if MBGL_USE_EGL
eglTerminate(dpy);
gbm_device_destroy(gbm);
close(fd);
#endif
}
} // namespace mbgl
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