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#include <jni.h>
#include <stdlib.h>
#include <assert.h>
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#undef WIN32_LEAN_AND_MEAN
#include <wingdi.h>
#include <stddef.h>
#ifdef _WIN32
#ifdef _MSC_VER
/* This typedef is apparently needed for Microsoft compilers before VC8,
and on Windows CE */
#if (_MSC_VER < 1400) || defined(UNDER_CE)
#ifdef _WIN64
typedef long long intptr_t;
#else
typedef int intptr_t;
#endif
#endif
#else
#include <inttypes.h>
#endif
#else
#include <inttypes.h>
#endif
#include <stdio.h>
#include "com_jogamp_nativewindow_impl_windows_GDI.h"
// #define VERBOSE_ON 1
#ifdef VERBOSE_ON
#define DBG_PRINT(args...) fprintf(stderr, args);
#else
#define DBG_PRINT(args...)
#endif
static void _FatalError(JNIEnv *env, const char* msg, ...)
{
char buffer[512];
va_list ap;
va_start(ap, msg);
vsnprintf(buffer, sizeof(buffer), msg, ap);
va_end(ap);
fprintf(stderr, "%s\n", buffer);
(*env)->FatalError(env, buffer);
}
static const char * const ClazzNamePoint = "javax/media/nativewindow/util/Point";
static const char * const ClazzAnyCstrName = "<init>";
static const char * const ClazzNamePointCstrSignature = "(II)V";
static jclass pointClz = NULL;
static jmethodID pointCstr = NULL;
#define NATIVEWINDOW_DUMMY_WINDOW_NAME "__nativewindow_dummy_window"
static ATOM nativewindowClass = 0;
LRESULT CALLBACK DummyWndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
return DefWindowProc(hWnd,uMsg,wParam,lParam);
}
HWND CreateDummyWindow(HINSTANCE hInstance, int x, int y, int width, int height ) {
DWORD dwExStyle;
DWORD dwStyle;
HWND hWnd;
dwExStyle = WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;
dwStyle = WS_OVERLAPPEDWINDOW;
if( !(hWnd=CreateWindowEx( dwExStyle,
NATIVEWINDOW_DUMMY_WINDOW_NAME,
NATIVEWINDOW_DUMMY_WINDOW_NAME,
dwStyle | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
x, y, width, height,
NULL, NULL, hInstance, NULL ) ) ) {
return( 0 );
}
return( hWnd );
}
/*
* Class: com_jogamp_nativewindow_impl_windows_GDI
* Method: initIDs0
* Signature: ()Z
*/
JNIEXPORT jlong JNICALL Java_com_jogamp_nativewindow_impl_windows_GDI_initIDs0
(JNIEnv *env, jclass clazz)
{
if(NULL==pointClz) {
jclass c = (*env)->FindClass(env, ClazzNamePoint);
if(NULL==c) {
_FatalError(env, "FatalError com_jogamp_nativewindow_impl_windows_GDI: can't find %s", ClazzNamePoint);
}
pointClz = (jclass)(*env)->NewGlobalRef(env, c);
(*env)->DeleteLocalRef(env, c);
if(NULL==pointClz) {
_FatalError(env, "FatalError com_jogamp_nativewindow_impl_windows_GDI: can't use %s", ClazzNamePoint);
}
pointCstr = (*env)->GetMethodID(env, pointClz, ClazzAnyCstrName, ClazzNamePointCstrSignature);
if(NULL==pointCstr) {
_FatalError(env, "FatalError com_jogamp_nativewindow_impl_windows_GDI: can't fetch %s.%s %s",
ClazzNamePoint, ClazzAnyCstrName, ClazzNamePointCstrSignature);
}
}
HINSTANCE hInstance = GetModuleHandle(NULL);
if( !nativewindowClass ) {
WNDCLASS wc;
ZeroMemory( &wc, sizeof( wc ) );
wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
wc.lpfnWndProc = (WNDPROC) DummyWndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = NULL;
wc.hCursor = NULL;
wc.hbrBackground = NULL;
wc.lpszMenuName = NULL;
wc.lpszClassName = NATIVEWINDOW_DUMMY_WINDOW_NAME;
if( !(nativewindowClass = RegisterClass( &wc )) ) {
_FatalError(env, "FatalError com_jogamp_nativewindow_impl_windows_GDI: RegisterClass Failed: %d", GetLastError() );
}
}
return (jlong) hInstance;
}
/*
* Class: com_jogamp_nativewindow_impl_windows_GDI
* Method: GetRelativeLocation0
* Signature: (JJII)Ljavax/media/nativewindow/util/Point;
*/
JNIEXPORT jobject JNICALL Java_com_jogamp_nativewindow_impl_windows_GDI_GetRelativeLocation0
(JNIEnv *env, jclass unused, jlong jsrc_win, jlong jdest_win, jint src_x, jint src_y)
{
HWND src_win = (HWND) (intptr_t) jsrc_win;
HWND dest_win = (HWND) (intptr_t) jdest_win;
POINT dest = { src_x, src_y } ;
int res;
res = MapWindowPoints(src_win, dest_win, &dest, 1);
DBG_PRINT("*** WindowsWindow: getRelativeLocation0: %p %d/%d -> %p %d/%d - ok: %d\n",
(void*)src_win, src_x, src_y, (void*)dest_win, (int)dest.x, (int)dest.y, res);
return (*env)->NewObject(env, pointClz, pointCstr, (jint)dest.x, (jint)dest.y);
}
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