LRESULT CALLBACK MyFunc( HWND h, UINT msg, WPARAM w, LPARAM p )
{
HDC dc;
PAINTSTRUCT ps;
int x = ( ( int )( short )LOWORD( p ) ), y = ( ( int )( short )HIWORD( p ) );
switch ( msg )
{
case WM_KEYUP:
if ( w == 27 ) { SendMessage( h, WM_DESTROY, 0, 0 ); } // OnKeyUp( w );
break;
case WM_KEYDOWN:
OnKeyDown( w );
break;
case WM_LBUTTONDOWN:
SetCapture( h );
OnMouseDown( 0, x, y );
break;
case WM_MOUSEMOVE:
OnMouseMove( x, y );
break;
case WM_LBUTTONUP:
OnMouseUp( 0, x, y );
ReleaseCapture();
break;
case WM_DESTROY:
PostQuitMessage( 0 );
break;
case WM_PAINT:
OnDrawFrame();
dc = BeginPaint( h, &ps );
// transfer the g_FrameBuffer to the hTmpBmp
SetDIBits( hMemDC, hTmpBmp, 0, ImageHeight, g_FrameBuffer, &BitmapInfo, DIB_RGB_COLORS );
SelectObject( hMemDC, hTmpBmp );
// Copying the offscreen buffer to the window surface
BitBlt( dc, 0, 0, ImageWidth, ImageHeight, hMemDC, 0, 0, SRCCOPY );
EndPaint( h, &ps );
break;
case WM_TIMER:
InvalidateRect( h, NULL, 1 );
break;
}
return DefWindowProc( h, msg, w, p );
}
JNIEXPORT void JNICALL Java_com_packtpub_ndkcookbook_app12_App12Activity_DrawFrame( JNIEnv* env, jobject obj )
{
// call our callback
OnDrawFrame();
glActiveTexture( GL_TEXTURE0 );
glBindTexture( GL_TEXTURE_2D, g_Texture );
glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0, ImageWidth, ImageHeight, GL_RGBA, GL_UNSIGNED_BYTE, g_FrameBuffer );
// render on screen
GLDebug_RenderTriangle();
}
void OpenGLRenderForm::OnTimerExpired(Osp::Base::Runtime::Timer & timer) {
if (isRendering) {
_timer->Start(TIMER_INTERVAL_MS);
OnDrawFrame();
eglSwapBuffers(eDisplay, eSurface);
static float fps = 0.0f;
static float updateInterval = 1000.0f;
static float timeSinceLastUpdate = 0.0f;
static float frameCount = 0;
static long long currentTick;
static long long lastTick;
static bool isFirst = true;
if (isFirst)
{
SystemTime::GetTicks(currentTick);
lastTick = currentTick;
isFirst = false;
}
frameCount++;
SystemTime::GetTicks(currentTick);
float elapsed = currentTick - lastTick;
lastTick = currentTick;
timeSinceLastUpdate += elapsed;
if (timeSinceLastUpdate > updateInterval)
{
if (timeSinceLastUpdate)
{
fps = (frameCount / timeSinceLastUpdate) * 1000.f;
AppLog("FPS: %f frames/sec\n", fps);
frameCount = 0;
timeSinceLastUpdate -= updateInterval;
}
}
}
}
void GenerateTicks()
{
NewTime = GetSeconds();
float DeltaSeconds = static_cast<float>( NewTime - OldTime );
OldTime = NewTime;
const float TIME_QUANTUM = 0.0166666f;
const float MAX_EXECUTION_TIME = 10.0f * TIME_QUANTUM;
ExecutionTime += DeltaSeconds;
if ( ExecutionTime > MAX_EXECUTION_TIME ) { ExecutionTime = MAX_EXECUTION_TIME; }
while ( ExecutionTime > TIME_QUANTUM )
{
ExecutionTime -= TIME_QUANTUM;
OnTimer( TIME_QUANTUM );
}
OnDrawFrame();
}
