const char *eglDisplay::queryString(EGLint name)
{
if (name == EGL_CLIENT_APIS) {
return "OpenGL_ES";
}
else if (name == EGL_VERSION) {
pthread_mutex_lock(&m_lock);
if (m_versionString) {
pthread_mutex_unlock(&m_lock);
return m_versionString;
}
// build version string
asprintf(&m_versionString, "%d.%d", m_major, m_minor);
pthread_mutex_unlock(&m_lock);
return m_versionString;
}
else if (name == EGL_VENDOR) {
pthread_mutex_lock(&m_lock);
if (m_vendorString) {
pthread_mutex_unlock(&m_lock);
return m_vendorString;
}
// build vendor string
const char *hostVendor = queryHostEGLString(EGL_VENDOR);
if (hostVendor) {
asprintf(&m_vendorString, "%s Host: %s",
systemEGLVendor, hostVendor);
free((char*)hostVendor);
}
else {
m_vendorString = (char *)systemEGLVendor;
}
pthread_mutex_unlock(&m_lock);
return m_vendorString;
}
else if (name == EGL_EXTENSIONS) {
pthread_mutex_lock(&m_lock);
if (m_extensionString) {
pthread_mutex_unlock(&m_lock);
return m_extensionString;
}
// build extension string
m_extensionString = buildExtensionString();
pthread_mutex_unlock(&m_lock);
return m_extensionString;
}
else {
ALOGE("[%s] Unknown name %d\n", __FUNCTION__, name);
return NULL;
}
}
static char *buildExtensionString()
{
//Query host extension string
char *hostExt = queryHostEGLString(EGL_EXTENSIONS);
if (!hostExt || (hostExt[1] == '\0')) {
// no extensions on host - only static extension list supported
return strdup(systemStaticEGLExtensions);
}
//
// Filter host extension list to include only extensions
// we can support (in the systemDynamicEGLExtensions list)
//
char *ext = (char *)hostExt;
char *c = ext;
char *insert = ext;
while(*c != '\0') {
if (*c == ' ') {
int len = c - ext;
if (findExtInList(ext, len, systemDynamicEGLExtensions)) {
if (ext != insert) {
memcpy(insert, ext, len+1); // including space
}
insert += (len + 1);
}
ext = c + 1;
}
c++;
}
*insert = '\0';
int n = strlen(hostExt);
if (n > 0) {
char *str;
asprintf(&str,"%s%s", systemStaticEGLExtensions, hostExt);
free((char*)hostExt);
return str;
}
else {
free((char*)hostExt);
return strdup(systemStaticEGLExtensions);
}
}
static char *buildExtensionString()
{
//Query host extension string
char *hostExt = queryHostEGLString(EGL_EXTENSIONS);
if (!hostExt || (hostExt[1] == '\0')) {
// no extensions on host - only static extension list supported
return strdup(systemStaticEGLExtensions);
}
int n = strlen(hostExt);
if (n > 0) {
char *str;
asprintf(&str,"%s%s", systemStaticEGLExtensions, hostExt);
free((char*)hostExt);
return str;
}
else {
free((char*)hostExt);
return strdup(systemStaticEGLExtensions);
}
}
