279 lines
8.6 KiB
C
279 lines
8.6 KiB
C
/*
|
|
* @(#)jawt.h 1.11 05/11/17
|
|
*
|
|
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
|
|
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
|
|
*/
|
|
|
|
#ifndef _JAVASOFT_JAWT_H_
|
|
#define _JAVASOFT_JAWT_H_
|
|
|
|
#include "jni.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*
|
|
* AWT native interface (new in JDK 1.3)
|
|
*
|
|
* The AWT native interface allows a native C or C++ application a means
|
|
* by which to access native structures in AWT. This is to facilitate moving
|
|
* legacy C and C++ applications to Java and to target the needs of the
|
|
* community who, at present, wish to do their own native rendering to canvases
|
|
* for performance reasons. Standard extensions such as Java3D also require a
|
|
* means to access the underlying native data structures of AWT.
|
|
*
|
|
* There may be future extensions to this API depending on demand.
|
|
*
|
|
* A VM does not have to implement this API in order to pass the JCK.
|
|
* It is recommended, however, that this API is implemented on VMs that support
|
|
* standard extensions, such as Java3D.
|
|
*
|
|
* Since this is a native API, any program which uses it cannot be considered
|
|
* 100% pure java.
|
|
*/
|
|
|
|
/*
|
|
* AWT Native Drawing Surface (JAWT_DrawingSurface).
|
|
*
|
|
* For each platform, there is a native drawing surface structure. This
|
|
* platform-specific structure can be found in jawt_md.h. It is recommended
|
|
* that additional platforms follow the same model. It is also recommended
|
|
* that VMs on Win32 and Solaris support the existing structures in jawt_md.h.
|
|
*
|
|
*******************
|
|
* EXAMPLE OF USAGE:
|
|
*******************
|
|
*
|
|
* In Win32, a programmer wishes to access the HWND of a canvas to perform
|
|
* native rendering into it. The programmer has declared the paint() method
|
|
* for their canvas subclass to be native:
|
|
*
|
|
*
|
|
* MyCanvas.java:
|
|
*
|
|
* import java.awt.*;
|
|
*
|
|
* public class MyCanvas extends Canvas {
|
|
*
|
|
* static {
|
|
* System.loadLibrary("mylib");
|
|
* }
|
|
*
|
|
* public native void paint(Graphics g);
|
|
* }
|
|
*
|
|
*
|
|
* myfile.c:
|
|
*
|
|
* #include "jawt_md.h"
|
|
* #include <assert.h>
|
|
*
|
|
* JNIEXPORT void JNICALL
|
|
* Java_MyCanvas_paint(JNIEnv* env, jobject canvas, jobject graphics)
|
|
* {
|
|
* JAWT awt;
|
|
* JAWT_DrawingSurface* ds;
|
|
* JAWT_DrawingSurfaceInfo* dsi;
|
|
* JAWT_Win32DrawingSurfaceInfo* dsi_win;
|
|
* jboolean result;
|
|
* jint lock;
|
|
*
|
|
* // Get the AWT
|
|
* awt.version = JAWT_VERSION_1_3;
|
|
* result = JAWT_GetAWT(env, &awt);
|
|
* assert(result != JNI_FALSE);
|
|
*
|
|
* // Get the drawing surface
|
|
* ds = awt.GetDrawingSurface(env, canvas);
|
|
* assert(ds != NULL);
|
|
*
|
|
* // Lock the drawing surface
|
|
* lock = ds->Lock(ds);
|
|
* assert((lock & JAWT_LOCK_ERROR) == 0);
|
|
*
|
|
* // Get the drawing surface info
|
|
* dsi = ds->GetDrawingSurfaceInfo(ds);
|
|
*
|
|
* // Get the platform-specific drawing info
|
|
* dsi_win = (JAWT_Win32DrawingSurfaceInfo*)dsi->platformInfo;
|
|
*
|
|
* //////////////////////////////
|
|
* // !!! DO PAINTING HERE !!! //
|
|
* //////////////////////////////
|
|
*
|
|
* // Free the drawing surface info
|
|
* ds->FreeDrawingSurfaceInfo(dsi);
|
|
*
|
|
* // Unlock the drawing surface
|
|
* ds->Unlock(ds);
|
|
*
|
|
* // Free the drawing surface
|
|
* awt.FreeDrawingSurface(ds);
|
|
* }
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* JAWT_Rectangle
|
|
* Structure for a native rectangle.
|
|
*/
|
|
typedef struct jawt_Rectangle {
|
|
jint x;
|
|
jint y;
|
|
jint width;
|
|
jint height;
|
|
} JAWT_Rectangle;
|
|
|
|
struct jawt_DrawingSurface;
|
|
|
|
/*
|
|
* JAWT_DrawingSurfaceInfo
|
|
* Structure for containing the underlying drawing information of a component.
|
|
*/
|
|
typedef struct jawt_DrawingSurfaceInfo {
|
|
/*
|
|
* Pointer to the platform-specific information. This can be safely
|
|
* cast to a JAWT_Win32DrawingSurfaceInfo on Windows or a
|
|
* JAWT_X11DrawingSurfaceInfo on Solaris. See jawt_md.h for details.
|
|
*/
|
|
void* platformInfo;
|
|
/* Cached pointer to the underlying drawing surface */
|
|
struct jawt_DrawingSurface* ds;
|
|
/* Bounding rectangle of the drawing surface */
|
|
JAWT_Rectangle bounds;
|
|
/* Number of rectangles in the clip */
|
|
jint clipSize;
|
|
/* Clip rectangle array */
|
|
JAWT_Rectangle* clip;
|
|
} JAWT_DrawingSurfaceInfo;
|
|
|
|
#define JAWT_LOCK_ERROR 0x00000001
|
|
#define JAWT_LOCK_CLIP_CHANGED 0x00000002
|
|
#define JAWT_LOCK_BOUNDS_CHANGED 0x00000004
|
|
#define JAWT_LOCK_SURFACE_CHANGED 0x00000008
|
|
|
|
/*
|
|
* JAWT_DrawingSurface
|
|
* Structure for containing the underlying drawing information of a component.
|
|
* All operations on a JAWT_DrawingSurface MUST be performed from the same
|
|
* thread as the call to GetDrawingSurface.
|
|
*/
|
|
typedef struct jawt_DrawingSurface {
|
|
/*
|
|
* Cached reference to the Java environment of the calling thread.
|
|
* If Lock(), Unlock(), GetDrawingSurfaceInfo() or
|
|
* FreeDrawingSurfaceInfo() are called from a different thread,
|
|
* this data member should be set before calling those functions.
|
|
*/
|
|
JNIEnv* env;
|
|
/* Cached reference to the target object */
|
|
jobject target;
|
|
/*
|
|
* Lock the surface of the target component for native rendering.
|
|
* When finished drawing, the surface must be unlocked with
|
|
* Unlock(). This function returns a bitmask with one or more of the
|
|
* following values:
|
|
*
|
|
* JAWT_LOCK_ERROR - When an error has occurred and the surface could not
|
|
* be locked.
|
|
*
|
|
* JAWT_LOCK_CLIP_CHANGED - When the clip region has changed.
|
|
*
|
|
* JAWT_LOCK_BOUNDS_CHANGED - When the bounds of the surface have changed.
|
|
*
|
|
* JAWT_LOCK_SURFACE_CHANGED - When the surface itself has changed
|
|
*/
|
|
jint (JNICALL *Lock)
|
|
(struct jawt_DrawingSurface* ds);
|
|
/*
|
|
* Get the drawing surface info.
|
|
* The value returned may be cached, but the values may change if
|
|
* additional calls to Lock() or Unlock() are made.
|
|
* Lock() must be called before this can return a valid value.
|
|
* Returns NULL if an error has occurred.
|
|
* When finished with the returned value, FreeDrawingSurfaceInfo must be
|
|
* called.
|
|
*/
|
|
JAWT_DrawingSurfaceInfo* (JNICALL *GetDrawingSurfaceInfo)
|
|
(struct jawt_DrawingSurface* ds);
|
|
/*
|
|
* Free the drawing surface info.
|
|
*/
|
|
void (JNICALL *FreeDrawingSurfaceInfo)
|
|
(JAWT_DrawingSurfaceInfo* dsi);
|
|
/*
|
|
* Unlock the drawing surface of the target component for native rendering.
|
|
*/
|
|
void (JNICALL *Unlock)
|
|
(struct jawt_DrawingSurface* ds);
|
|
} JAWT_DrawingSurface;
|
|
|
|
/*
|
|
* JAWT
|
|
* Structure for containing native AWT functions.
|
|
*/
|
|
typedef struct jawt {
|
|
/*
|
|
* Version of this structure. This must always be set before
|
|
* calling JAWT_GetAWT()
|
|
*/
|
|
jint version;
|
|
/*
|
|
* Return a drawing surface from a target jobject. This value
|
|
* may be cached.
|
|
* Returns NULL if an error has occurred.
|
|
* Target must be a java.awt.Component (should be a Canvas
|
|
* or Window for native rendering).
|
|
* FreeDrawingSurface() must be called when finished with the
|
|
* returned JAWT_DrawingSurface.
|
|
*/
|
|
JAWT_DrawingSurface* (JNICALL *GetDrawingSurface)
|
|
(JNIEnv* env, jobject target);
|
|
/*
|
|
* Free the drawing surface allocated in GetDrawingSurface.
|
|
*/
|
|
void (JNICALL *FreeDrawingSurface)
|
|
(JAWT_DrawingSurface* ds);
|
|
/*
|
|
* Since 1.4
|
|
* Locks the entire AWT for synchronization purposes
|
|
*/
|
|
void (JNICALL *Lock)(JNIEnv* env);
|
|
/*
|
|
* Since 1.4
|
|
* Unlocks the entire AWT for synchronization purposes
|
|
*/
|
|
void (JNICALL *Unlock)(JNIEnv* env);
|
|
/*
|
|
* Since 1.4
|
|
* Returns a reference to a java.awt.Component from a native
|
|
* platform handle. On Windows, this corresponds to an HWND;
|
|
* on Solaris and Linux, this is a Drawable. For other platforms,
|
|
* see the appropriate machine-dependent header file for a description.
|
|
* The reference returned by this function is a local
|
|
* reference that is only valid in this environment.
|
|
* This function returns a NULL reference if no component could be
|
|
* found with matching platform information.
|
|
*/
|
|
jobject (JNICALL *GetComponent)(JNIEnv* env, void* platformInfo);
|
|
|
|
} JAWT;
|
|
|
|
/*
|
|
* Get the AWT native structure. This function returns JNI_FALSE if
|
|
* an error occurs.
|
|
*/
|
|
_JNI_IMPORT_OR_EXPORT_ __attribute__((deprecated))
|
|
jboolean JNICALL JAWT_GetAWT(JNIEnv* env, JAWT* awt);
|
|
|
|
#define JAWT_VERSION_1_3 0x00010003
|
|
#define JAWT_VERSION_1_4 0x00010004
|
|
|
|
#ifdef __cplusplus
|
|
} /* extern "C" */
|
|
#endif
|
|
|
|
#endif /* !_JAVASOFT_JAWT_H_ */
|