// EGL functions
public static boolean initEGL(int majorVersion, int minorVersion, int[] attribs) {
try {
if (SDLActivity.mEGLDisplay == null) {
Log.v("SDL", "Starting up OpenGL ES " + majorVersion + "." + minorVersion);
EGL10 egl = (EGL10) EGLContext.getEGL();
EGLDisplay dpy = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
int[] version = new int[2];
egl.eglInitialize(dpy, version);
EGLConfig[] configs = new EGLConfig[1];
int[] num_config = new int[1];
if (!egl.eglChooseConfig(dpy, attribs, configs, 1, num_config) || num_config[0] == 0) {
Log.e("SDL", "No EGL config available");
return false;
}
EGLConfig config = configs[0];
SDLActivity.mEGLDisplay = dpy;
SDLActivity.mEGLConfig = config;
SDLActivity.mGLMajor = majorVersion;
SDLActivity.mGLMinor = minorVersion;
}
return SDLActivity.createEGLSurface();
} catch (Exception e) {
Log.v("SDL", e + "");
for (StackTraceElement s : e.getStackTrace()) {
Log.v("SDL", s.toString());
}
return false;
}
}
// EGL functions
public static boolean initEGL(int majorVersion, int minorVersion, int[] attribs) {
try {
EGL10 egl = (EGL10) EGLContext.getEGL();
if (SDLActivity.mEGLDisplay == null) {
SDLActivity.mEGLDisplay = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
int[] version = new int[2];
egl.eglInitialize(SDLActivity.mEGLDisplay, version);
}
if (SDLActivity.mEGLDisplay != null && SDLActivity.mEGLContext == EGL10.EGL_NO_CONTEXT) {
// No current GL context exists, we will create a new one.
Log.v("SDL", "Starting up OpenGL ES " + majorVersion + "." + minorVersion);
EGLConfig[] configs = new EGLConfig[128];
int[] num_config = new int[1];
if (!egl.eglChooseConfig(SDLActivity.mEGLDisplay, attribs, configs, 1, num_config)
|| num_config[0] == 0) {
Log.e("SDL", "No EGL config available");
return false;
}
EGLConfig config = null;
int bestdiff = -1, bitdiff;
int[] value = new int[1];
// eglChooseConfig returns a number of configurations that match or exceed the requested
// attribs.
// From those, we select the one that matches our requirements more closely
Log.v("SDL", "Got " + num_config[0] + " valid modes from egl");
for (int i = 0; i < num_config[0]; i++) {
bitdiff = 0;
// Go through some of the attributes and compute the bit difference between what we want
// and what we get.
for (int j = 0; ; j += 2) {
if (attribs[j] == EGL10.EGL_NONE) break;
if (attribs[j + 1] != EGL10.EGL_DONT_CARE
&& (attribs[j] == EGL10.EGL_RED_SIZE
|| attribs[j] == EGL10.EGL_GREEN_SIZE
|| attribs[j] == EGL10.EGL_BLUE_SIZE
|| attribs[j] == EGL10.EGL_ALPHA_SIZE
|| attribs[j] == EGL10.EGL_DEPTH_SIZE
|| attribs[j] == EGL10.EGL_STENCIL_SIZE)) {
egl.eglGetConfigAttrib(SDLActivity.mEGLDisplay, configs[i], attribs[j], value);
bitdiff += value[0] - attribs[j + 1]; // value is always >= attrib
}
}
if (bitdiff < bestdiff || bestdiff == -1) {
config = configs[i];
bestdiff = bitdiff;
}
if (bitdiff == 0) break; // we found an exact match!
}
Log.d("SDL", "Selected mode with a total bit difference of " + bestdiff);
SDLActivity.mEGLConfig = config;
SDLActivity.mGLMajor = majorVersion;
SDLActivity.mGLMinor = minorVersion;
}
return SDLActivity.createEGLSurface();
} catch (Exception e) {
Log.v("SDL", e + "");
for (StackTraceElement s : e.getStackTrace()) {
Log.v("SDL", s.toString());
}
return false;
}
}