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windows: Fall back to D3D9 when 11 fails

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It is assumed that this happens automatically but that is not always the
case. Do not become stuck with a non-functional D3D11-backed EGL environment.
Instead, try again as if QT_ANGLE_PLATFORM=d3d9 was requested.

Task-number: QTBUG-52056
Change-Id: I12ac6ca5f1d06f9504d05120d8e1053e97edfab3
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
This commit is contained in:
Laszlo Agocs 2016-03-22 15:32:36 +01:00
parent 5c6d27b8df
commit bdb1c18e41
2 changed files with 47 additions and 26 deletions
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71
src/plugins/platforms/windows/qwindowseglcontext.cpp
View File

@ -347,6 +347,45 @@ QWindowsEGLStaticContext::QWindowsEGLStaticContext(EGLDisplay display)
{
}
bool QWindowsEGLStaticContext::initializeAngle(QWindowsOpenGLTester::Renderers preferredType, HDC dc,
EGLDisplay *display, EGLint *major, EGLint *minor)
{
#ifdef EGL_ANGLE_platform_angle
if (libEGL.eglGetPlatformDisplayEXT
&& (preferredType & QWindowsOpenGLTester::AngleBackendMask)) {
const EGLint anglePlatformAttributes[][5] = {
{ EGL_PLATFORM_ANGLE_TYPE_ANGLE, EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE, EGL_NONE },
{ EGL_PLATFORM_ANGLE_TYPE_ANGLE, EGL_PLATFORM_ANGLE_TYPE_D3D9_ANGLE, EGL_NONE },
{ EGL_PLATFORM_ANGLE_TYPE_ANGLE, EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE,
EGL_PLATFORM_ANGLE_DEVICE_TYPE_ANGLE, EGL_PLATFORM_ANGLE_DEVICE_TYPE_WARP_ANGLE, EGL_NONE }
};
const EGLint *attributes = 0;
if (preferredType & QWindowsOpenGLTester::AngleRendererD3d11)
attributes = anglePlatformAttributes[0];
else if (preferredType & QWindowsOpenGLTester::AngleRendererD3d9)
attributes = anglePlatformAttributes[1];
else if (preferredType & QWindowsOpenGLTester::AngleRendererD3d11Warp)
attributes = anglePlatformAttributes[2];
if (attributes) {
*display = libEGL.eglGetPlatformDisplayEXT(EGL_PLATFORM_ANGLE_ANGLE, dc, attributes);
if (!libEGL.eglInitialize(*display, major, minor)) {
libEGL.eglTerminate(*display);
*display = EGL_NO_DISPLAY;
*major = *minor = 0;
return false;
}
}
}
#else // EGL_ANGLE_platform_angle
Q_UNUSED(preferredType);
Q_UNUSED(dc);
Q_UNUSED(display);
Q_UNUSED(major);
Q_UNUSED(minor);
#endif
return true;
}
QWindowsEGLStaticContext *QWindowsEGLStaticContext::create(QWindowsOpenGLTester::Renderers preferredType)
{
const HDC dc = QWindowsContext::instance()->displayContext();
@ -367,33 +406,13 @@ QWindowsEGLStaticContext *QWindowsEGLStaticContext::create(QWindowsOpenGLTester:
EGLDisplay display = EGL_NO_DISPLAY;
EGLint major = 0;
EGLint minor = 0;
#ifdef EGL_ANGLE_platform_angle
if (libEGL.eglGetPlatformDisplayEXT
&& (preferredType & QWindowsOpenGLTester::AngleBackendMask)) {
const EGLint anglePlatformAttributes[][5] = {
{ EGL_PLATFORM_ANGLE_TYPE_ANGLE, EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE, EGL_NONE },
{ EGL_PLATFORM_ANGLE_TYPE_ANGLE, EGL_PLATFORM_ANGLE_TYPE_D3D9_ANGLE, EGL_NONE },
{ EGL_PLATFORM_ANGLE_TYPE_ANGLE, EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE,
EGL_PLATFORM_ANGLE_DEVICE_TYPE_ANGLE, EGL_PLATFORM_ANGLE_DEVICE_TYPE_WARP_ANGLE, EGL_NONE }
};
const EGLint *attributes = 0;
if (preferredType & QWindowsOpenGLTester::AngleRendererD3d11)
attributes = anglePlatformAttributes[0];
else if (preferredType & QWindowsOpenGLTester::AngleRendererD3d9)
attributes = anglePlatformAttributes[1];
else if (preferredType & QWindowsOpenGLTester::AngleRendererD3d11Warp)
attributes = anglePlatformAttributes[2];
if (attributes) {
display = libEGL.eglGetPlatformDisplayEXT(EGL_PLATFORM_ANGLE_ANGLE, dc, attributes);
if (!libEGL.eglInitialize(display, &major, &minor)) {
display = EGL_NO_DISPLAY;
major = minor = 0;
}
}
if (!initializeAngle(preferredType, dc, &display, &major, &minor)
&& (preferredType & QWindowsOpenGLTester::AngleRendererD3d11)) {
preferredType &= ~QWindowsOpenGLTester::AngleRendererD3d11;
initializeAngle(preferredType, dc, &display, &major, &minor);
}
#else // EGL_ANGLE_platform_angle
Q_UNUSED(preferredType)
#endif
if (display == EGL_NO_DISPLAY)
display = libEGL.eglGetDisplay(dc);
if (!display) {

2
src/plugins/platforms/windows/qwindowseglcontext.h
View File

@ -271,6 +271,8 @@ public:
private:
explicit QWindowsEGLStaticContext(EGLDisplay display);
static bool initializeAngle(QWindowsOpenGLTester::Renderers preferredType, HDC dc,
EGLDisplay *display, EGLint *major, EGLint *minor);
const EGLDisplay m_display;
};