XVisualInfo EglContext::selectBestVisual(::Display* XDisplay, unsigned int bitsPerPixel, const ContextSettings& settings)
{
// Get the initialized EGL display
EGLDisplay display = getInitializedDisplay();
// Get the best EGL config matching the default video settings
EGLConfig config = getBestConfig(display, bitsPerPixel, settings);
// Retrieve the visual id associated with this EGL config
EGLint nativeVisualId;
eglCheck(eglGetConfigAttrib(display, config, EGL_NATIVE_VISUAL_ID, &nativeVisualId));
if (nativeVisualId == 0)
{
// Should never happen...
err() << "No EGL visual found. You should check your graphics driver" << std::endl;
return XVisualInfo();
}
XVisualInfo vTemplate;
vTemplate.visualid = static_cast<VisualID>(nativeVisualId);
// Get X11 visuals compatible with this EGL config
XVisualInfo *availableVisuals, bestVisual;
int visualCount = 0;
availableVisuals = XGetVisualInfo(XDisplay, VisualIDMask, &vTemplate, &visualCount);
if (visualCount == 0)
{
// Can't happen...
err() << "No X11 visual found. Bug in your EGL implementation ?" << std::endl;
return XVisualInfo();
}
// Pick up the best one
bestVisual = availableVisuals[0];
XFree(availableVisuals);
return bestVisual;
}
XVisualInfo GlxContext::selectBestVisual(::Display* display, unsigned int bitsPerPixel, const ContextSettings& settings)
{
// Retrieve all the visuals
int count;
XVisualInfo* visuals = XGetVisualInfo(display, 0, NULL, &count);
if (visuals)
{
// Evaluate all the returned visuals, and pick the best one
int bestScore = 0xFFFF;
XVisualInfo bestVisual;
for (int i = 0; i < count; ++i)
{
// Check mandatory attributes
int doubleBuffer;
glXGetConfig(display, &visuals[i], GLX_DOUBLEBUFFER, &doubleBuffer);
if (!doubleBuffer)
continue;
// Extract the components of the current visual
int red, green, blue, alpha, depth, stencil, multiSampling, samples;
glXGetConfig(display, &visuals[i], GLX_RED_SIZE, &red);
glXGetConfig(display, &visuals[i], GLX_GREEN_SIZE, &green);
glXGetConfig(display, &visuals[i], GLX_BLUE_SIZE, &blue);
glXGetConfig(display, &visuals[i], GLX_ALPHA_SIZE, &alpha);
glXGetConfig(display, &visuals[i], GLX_DEPTH_SIZE, &depth);
glXGetConfig(display, &visuals[i], GLX_STENCIL_SIZE, &stencil);
glXGetConfig(display, &visuals[i], GLX_SAMPLE_BUFFERS_ARB, &multiSampling);
glXGetConfig(display, &visuals[i], GLX_SAMPLES_ARB, &samples);
// Evaluate the visual
int color = red + green + blue + alpha;
int score = evaluateFormat(bitsPerPixel, settings, color, depth, stencil, multiSampling ? samples : 0);
// If it's better than the current best, make it the new best
if (score < bestScore)
{
bestScore = score;
bestVisual = visuals[i];
}
}
// Free the array of visuals
XFree(visuals);
return bestVisual;
}
else
{
// Should never happen...
err() << "No GLX visual found. You should check your graphics driver" << std::endl;
return XVisualInfo();
}
}
Window::Window (Display& display, int width, int height, ::Visual* visual)
: m_display (display)
, m_colormap (None)
, m_window (None)
, m_visible (false)
{
XSetWindowAttributes swa;
::Display* const dpy = m_display.getXDisplay();
::Window root = DefaultRootWindow(dpy);
unsigned long mask = CWBorderPixel | CWEventMask;
// If redirect is enabled, window size can't be guaranteed and it is up to
// the window manager to decide whether to honor sizing requests. However,
// overriding that causes window to appear as an overlay, which causes
// other issues, so this is disabled by default.
const bool overrideRedirect = false;
if (overrideRedirect)
{
mask |= CWOverrideRedirect;
swa.override_redirect = true;
}
if (visual == DE_NULL)
visual = CopyFromParent;
else
{
XVisualInfo info = XVisualInfo();
bool succ = display.getVisualInfo(XVisualIDFromVisual(visual), info);
TCU_CHECK_INTERNAL(succ);
root = RootWindow(dpy, info.screen);
m_colormap = XCreateColormap(dpy, root, visual, AllocNone);
swa.colormap = m_colormap;
mask |= CWColormap;
}
swa.border_pixel = 0;
swa.event_mask = ExposureMask|KeyPressMask|KeyReleaseMask|StructureNotifyMask;
if (width == glu::RenderConfig::DONT_CARE)
width = DEFAULT_WINDOW_WIDTH;
if (height == glu::RenderConfig::DONT_CARE)
height = DEFAULT_WINDOW_HEIGHT;
m_window = XCreateWindow(dpy, root, 0, 0, width, height, 0,
CopyFromParent, InputOutput, visual, mask, &swa);
TCU_CHECK(m_window);
Atom deleteAtom = m_display.getDeleteAtom();
XSetWMProtocols(dpy, m_window, &deleteAtom, 1);
}
Window::Window (Display& display, int width, int height, ::Visual* visual)
: m_display (display)
, m_colormap (None)
, m_window (None)
, m_visible (false)
{
XSetWindowAttributes swa;
::Display* dpy = m_display.getXDisplay();
::Window root = DefaultRootWindow(dpy);
unsigned long mask = CWBorderPixel | CWEventMask;
if (visual == DE_NULL)
visual = CopyFromParent;
else
{
XVisualInfo info = XVisualInfo();
bool succ = display.getVisualInfo(XVisualIDFromVisual(visual), info);
TCU_CHECK_INTERNAL(succ);
root = RootWindow(dpy, info.screen);
m_colormap = XCreateColormap(dpy, root, visual, AllocNone);
swa.colormap = m_colormap;
mask |= CWColormap;
}
swa.border_pixel = 0;
swa.event_mask = ExposureMask|KeyPressMask|KeyReleaseMask|StructureNotifyMask;
mask |= CWOverrideRedirect;
swa.override_redirect = true;
if (width == glu::RenderConfig::DONT_CARE)
width = DEFAULT_WINDOW_WIDTH;
if (height == glu::RenderConfig::DONT_CARE)
height = DEFAULT_WINDOW_HEIGHT;
m_window = XCreateWindow(dpy, root, 0, 0, width, height, 0,
CopyFromParent, InputOutput, visual, mask, &swa);
TCU_CHECK(m_window);
Atom deleteAtom = m_display.getDeleteAtom();
XSetWMProtocols(dpy, m_window, &deleteAtom, 1);
}