1 files changed, 65 insertions, 0 deletions
diff --git a/common/headless_display.cpp b/common/headless_display.cpp
new file mode 100644
index 0000000000..580d3ef587
--- /dev/null
+++ b/common/headless_display.cpp
@@ -0,0 +1,65 @@
+#include "headless_view.hpp"
+
+#include <stdexcept>
+
+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,
+        (CGLPixelFormatAttribute) kCGLOGLPVersion_Legacy,
+        kCGLPFAAccelerated,
+        (CGLPixelFormatAttribute) 0
+    };
+
+    GLint num;
+    CGLError error = CGLChoosePixelFormat(attributes, &pixelFormat, &num);
+    if (error) {
+        fprintf(stderr, "Error pixel format: %s\n", CGLErrorString(error));
+        return;
+    }
+#endif
+
+#if MBGL_USE_GLX
+    x_display = XOpenDisplay(0);
+
+    if (x_display == nullptr) {
+        throw std::runtime_error("Failed to open X display");
+    }
+
+    static int pixelFormat[] = {
+        GLX_RGBA,
+        GLX_DOUBLEBUFFER,
+        GLX_RED_SIZE, 8,
+        GLX_GREEN_SIZE, 8,
+        GLX_BLUE_SIZE, 8,
+        GLX_ALPHA_SIZE, 8,
+        GLX_DEPTH_SIZE, 24,
+        GLX_STENCIL_SIZE, 8,
+        None
+    };
+
+    x_info = glXChooseVisual(x_display, DefaultScreen(x_display), pixelFormat);
+
+    if (x_info == nullptr) {
+        throw std::runtime_error("Error pixel format");
+    }
+#endif
+}
+
+HeadlessDisplay::~HeadlessDisplay() {
+#if MBGL_USE_CGL
+    CGLDestroyPixelFormat(pixelFormat);
+#endif
+
+#if MBGL_USE_GLX
+    XFree(x_info);
+    XCloseDisplay(x_display);
+#endif
+}
+
+}
+