83 lines
2.1 KiB
C++
83 lines
2.1 KiB
C++
#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");
|
|
}
|
|
|
|
|
|
static int pixelFormat[] = {
|
|
GLX_DOUBLEBUFFER, False,
|
|
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
|
|
};
|
|
|
|
int configs = 0;
|
|
fb_configs = glXChooseFBConfig(x_display, DefaultScreen(x_display), pixelFormat, &configs);
|
|
if (configs <= 0) {
|
|
throw std::runtime_error("No Framebuffer configurations");
|
|
}
|
|
|
|
XSync(x_display, False);
|
|
#endif
|
|
}
|
|
|
|
HeadlessDisplay::~HeadlessDisplay() {
|
|
#if MBGL_USE_CGL
|
|
CGLDestroyPixelFormat(pixelFormat);
|
|
#endif
|
|
|
|
#if MBGL_USE_GLX
|
|
XFree(fb_configs);
|
|
XCloseDisplay(x_display);
|
|
#endif
|
|
}
|
|
|
|
}
|
|
|