Bug 942: GLBufferObjectTracker: Tracking GLBufferStorage accurately, synchronized and secure [1/2]

GLBufferSizeTracker becomes GLBufferObjectTracker
and tracks the buffer's data store, GLBufferStorage, accurately, synchronized and secure.

Synchronization is required, since the GLBufferStorage can be
shared across many GLContext on multiple threads.

This requires all GLBufferStorage lifecycle affecting GL functions
to utilize synchronized GLBufferObjectTracker methods
while passing a native GL-func callback.

These GL functions are:
  - glBufferData, glBufferStorage (GL 4.4), glNamedBufferDataEXT
    Creating the GLBufferStorage object
  - glMapBuffer, glMapBufferRange, and their *Named*EXT variants
  - glUnmapBuffer, glUnmapNamedBufferEXT

'glDeleteBuffers' can simply notify the GLBufferObjectTracker

No more HashMap is required to associate the mapped buffer address
to the mapped ByteBuffer.

GLBufferObjectTracker simply utilizes a
   buffer-name (int) -> GLBufferStorage
map.

+++

The security aspect shall be implemented by validating all arguments
whether they match the required GL constraints,
as well as validating tracked states like 'size'.

The following functions will throw an GLException accordingly:
  - glBufferData, glNamedBufferDataEXT
     * @throws GLException if size is less-than zero
     * @throws GLException if a native GL-Error occurs

  - glBufferStorage (GL 4.4)
     * @throws GLException if size is less-or-eqaul zero
     * @throws GLException if a native GL-Error occurs

  - glMapBuffer, and it's *Named*EXT variant
    * @throws GLException if buffer is not bound to target
    * @throws GLException if buffer is not tracked
    * @throws GLException if buffer is already mapped
    * @throws GLException if buffer has invalid store size, i.e. less-than zero

  - glMapBufferRange, and it's *Named*EXT variant
    * @throws GLException if buffer is not bound to target
    * @throws GLException if buffer is not tracked
    * @throws GLException if buffer is already mapped
    * @throws GLException if buffer has invalid store size, i.e. less-than zero
    * @throws GLException if buffer mapping range does not fit, incl. offset

  - glMapBufferRange, and it's *Named*EXT variant
    Only clear mapped buffer reference of GLBufferStorage
    if native unmap was successful.

Further more special error handling shall be applied to:
  - glMapBuffer, and it's *Named*EXT variant,
    glMapBuffer, and it's *Named*EXT variant
    - A zero GLBufferStorage size will avoid a native call and
      returns null
    - A null native mapping result indicating an error will
     not cause a GLException but returns null
     This allows the user to handle this case.

1 files changed, 36 insertions, 0 deletions

diff --git a/make/config/jogl/gl-impl-CustomCCode-gles3.c b/make/config/jogl/gl-impl-CustomCCode-gles3.c
index 2f3329bfa..ff1d42e23 100644
--- a/make/config/jogl/gl-impl-CustomCCode-gles3.c
+++ b/make/config/jogl/gl-impl-CustomCCode-gles3.c
@@ -1,4 +1,40 @@
+/*   Java->C glue code:
+ *   Java package: jogamp.opengl.es3.GLES3Impl
+ *    Java method: void dispatch_glBufferData(int target, long size, java.nio.Buffer data, int usage)
+ *     C function: void glBufferData(GLenum target, GLsizeiptr size, const GLvoid *  data, GLenum usage);
+ */
+JNIEXPORT void JNICALL
+Java_jogamp_opengl_es3_GLES3Impl_dispatch_1glBufferData(JNIEnv *env, jobject _unused, jint target, jlong size, jobject data, jint data_byte_offset, jboolean data_is_nio, jint usage, jlong procAddress) {
+  typedef void (GL_APIENTRY*_local_PFNGLBUFFERDATAPROC)(GLenum target, GLsizeiptr size, const GLvoid *  data, GLenum usage);
+  _local_PFNGLBUFFERDATAPROC ptr_glBufferData;
+  GLvoid * _data_ptr = NULL;
+  if ( NULL != data ) {
+    _data_ptr = (GLvoid *) ( JNI_TRUE == data_is_nio ?  (*env)->GetDirectBufferAddress(env, data) :  (*env)->GetPrimitiveArrayCritical(env, data, NULL) );  }
+  ptr_glBufferData = (_local_PFNGLBUFFERDATAPROC) (intptr_t) procAddress;
+  assert(ptr_glBufferData != NULL);
+  (* ptr_glBufferData) ((GLenum) target, (GLsizeiptr) size, (GLvoid *) (((char *) _data_ptr) + data_byte_offset), (GLenum) usage);
+  if ( JNI_FALSE == data_is_nio && NULL != data ) {
+    (*env)->ReleasePrimitiveArrayCritical(env, data, _data_ptr, JNI_ABORT);  }
+}
+
+/*   Java->C glue code:
+ *   Java package: jogamp.opengl.es3.GLES3Impl
+ *    Java method: boolean dispatch_glUnmapBuffer(int target)
+ *     C function: GLboolean glUnmapBuffer(GLenum target);
+ */
+JNIEXPORT jboolean JNICALL
+Java_jogamp_opengl_es3_GLES3Impl_dispatch_1glUnmapBuffer(JNIEnv *env, jobject _unused, jint target, jlong procAddress) {
+  typedef GLboolean (GL_APIENTRY*_local_PFNGLUNMAPBUFFERPROC)(GLenum target);
+  _local_PFNGLUNMAPBUFFERPROC ptr_glUnmapBuffer;
+  GLboolean _res;
+  ptr_glUnmapBuffer = (_local_PFNGLUNMAPBUFFERPROC) (intptr_t) procAddress;
+  assert(ptr_glUnmapBuffer != NULL);
+  _res = (* ptr_glUnmapBuffer) ((GLenum) target);
+  return _res;
+}
+
 typedef GLvoid* (GL_APIENTRY* PFNGLMAPBUFFERPROC) (GLenum target, GLenum access);
+
 /*   Java->C glue code:
  *   Java package: jogamp.opengl.es3.GLES3Impl
  *    Java method: long dispatch_glMapBuffer(int target, int access)