bool Engine::renderFrame(bool allocateIfNeeded)
{
if (!mEgl.isReadyToRender(allocateIfNeeded))
return false;
if (!initUI())
{
LOGW("Could not initialize UI - assets may be missing!");
ANativeActivity_finish(mApp->activity);
return false;
}
resizeIfNeeded();
// set up viewport
glViewport((GLint)0, (GLint)0,
(GLsizei)(mEgl.getWidth()), (GLsizei)(mEgl.getHeight()));
// clear buffers as necessary
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// do some game rendering here
// ...
// start rendering bitfont text overlaid here.
NVBFTextRenderPrep();
m_ui->Render();
// done rendering overlaid text.
NVBFTextRenderDone();
if (mForceRender > 0)
mForceRender--;
mEgl.swap();
return true;
}
bool Engine::renderFrame(bool allocateIfNeeded)
{
if (!mEgl.isReadyToRender(allocateIfNeeded))
return false;
if (!initUI())
{
LOGW("Could not initialize UI - assets may be missing!");
ANativeActivity_finish(mApp->activity);
return false;
}
// We've gotten this far, so EGL is ready for us. Have we loaded our assets?
// Note that we cannot use APP_STATUS_GLES_LOADED to imply that EGL is
// ready to render. We can have a valid context with all GLES resources loaded
// into it but no surface and thus the context not bound. These are semi-
// independent states.
if (!mGlobeApp)
{
if (!allocateIfNeeded)
return false;
mGlobeApp = new GlobeApp;
}
if (!mGlobeApp->isInitialized())
{
if (!allocateIfNeeded)
return false;
// If we are initializing and we have a new, known size, set that
// before the init
resizeIfNeeded();
if (!mGlobeApp->init())
return false;
}
resizeIfNeeded();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
mGlobeApp->render((float)mTimeVal);
if (m_clockText)
{
NVBFTextRenderPrep();
NVBFTextRender(m_clockText);
NVBFTextRenderDone();
int mins = mTimeVal / 60;
float secs = (float)mTimeVal - mins*60;
char str[32];
sprintf(str, "%03d:%05.2f", mins, secs);
NVBFTextSetString(m_clockText, str);
}
// Render UI if needed
if (m_uiModeTextures[mCurrentMode])
{
int w = mEgl.getWidth();
int h = mEgl.getHeight();
mUIHalfSize = 300;
mUICenterX = w/2;
mUICenterY = h/2;
NvDrawRect::setScreenResolution(w, h);
static const float s_white[4] = {1.0f, 1.0f, 1.0f, 0.7f};
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
mDrawRect->draw(m_uiModeTextures[mCurrentMode],
mUICenterX - mUIHalfSize, mUICenterY - mUIHalfSize,
mUICenterX + mUIHalfSize, mUICenterY + mUIHalfSize, s_white);
glDisable(GL_BLEND);
}
if (mForceRender > 0)
mForceRender--;
mEgl.swap();
// A debug printout every 256 frames so we can see when we're
// actively rendering and swapping
if (!(mSwapCount++ & 0x00ff))
{
DEBUG("Swap count is %d", mSwapCount);
}
return true;
}