diff options
Diffstat (limited to 'common/headless_display.cpp')
-rw-r--r-- | common/headless_display.cpp | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/common/headless_display.cpp b/common/headless_display.cpp new file mode 100644 index 0000000000..3aaf2020b9 --- /dev/null +++ b/common/headless_display.cpp @@ -0,0 +1,74 @@ +#include "headless_display.hpp" + +#include <cstring> +#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 + if (!XInitThreads()) { + throw std::runtime_error("Failed to XInitThreads"); + } + + x_display = XOpenDisplay(nullptr); + if (x_display == nullptr) { + throw std::runtime_error("Failed to open X display"); + } + + const char *extensions = (char *)glXQueryServerString(x_display, DefaultScreen(x_display), GLX_EXTENSIONS); + if (!extensions) { + throw std::runtime_error("Cannot read GLX extensions"); + } + if (!strstr(extensions,"GLX_SGIX_fbconfig")) { + throw std::runtime_error("Extension GLX_SGIX_fbconfig was not found"); + } + if (!strstr(extensions, "GLX_SGIX_pbuffer")) { + throw std::runtime_error("Cannot find glXCreateContextAttribsARB"); + } + + // We're creating a dummy pbuffer anyway that we're not using. + static int pixelFormat[] = { + GLX_DRAWABLE_TYPE, GLX_PBUFFER_BIT, + None + }; + + int configs = 0; + fb_configs = glXChooseFBConfig(x_display, DefaultScreen(x_display), pixelFormat, &configs); + if (configs <= 0) { + throw std::runtime_error("No Framebuffer configurations"); + } +#endif +} + +HeadlessDisplay::~HeadlessDisplay() { +#if MBGL_USE_CGL + CGLDestroyPixelFormat(pixelFormat); +#endif + +#if MBGL_USE_GLX + XFree(fb_configs); + XCloseDisplay(x_display); +#endif +} + +} + |