API Header Example?

/********************************************************************[libaroma]*
 * Copyright (C) 2011-2015 Ahmad Amarullah (http://amarullz.com/)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *______________________________________________________________________________
 *
 * Filename    : aroma_api.h
 * Description : libaroma api header
 *
 * + This is part of libaroma, an embedded ui toolkit.
 * + 20/01/16 - Author(s): Ahmad Amarullah
 *
 */
#ifndef __aroma_api_h__
#define __aroma_api_h__
/* extern for cpp */
#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

/* primitive unsigneds */
typedef uint8_t  byte;
typedef uint16_t word;
typedef uint32_t dword;
typedef uint32_t uchar;
typedef byte * bytep;
typedef word * wordp;
typedef dword * dwordp;
#ifndef ZLIB_H
typedef void * voidp;
#endif
typedef uchar * ucharp;
typedef word acolor;
typedef wordp acolorp;

/* libaroma pointers */
typedef voidp acanvas;
typedef voidp awindow;
typedef voidp acontrol;
typedef voidp alist;
typedef voidp amessage;
typedef voidp astream;
typedef voidp atext;
typedef voidp aarray;
typedef voidp azip;

/* canvas api */
typedef struct{
  /* new */
  acanvas (*new)(int w,int h);
  acanvas (*new_alpha)(int w,int h);
  acanvas (*new_shmem)(int w,int h, byte alpha_canvas, const char * shmemname);
  acanvas (*new_area)(acanvas parent,int x,int y, int w, int h);

  /* free */
  acanvas (*free)(acanvas c);
  acanvas (*free_delete_shm)(acanvas c);

  /* duplicate */
  acanvas (*dup)(acanvas source);

  /* data processing */
  void (*clear)(acanvas c);
  void (*fill)(acanvas c, acolor color);
  void (*set)(acanvas c, acolor color, byte alpha);

  /* get */
  int (*width)(acanvas c);
  int (*height)(acanvas c);
  int (*size)(acanvas c);
  int (*line)(acanvas c);
  acolorp (*data)(acanvas c);
  bytep (*alpha)(acanvas c);
  byte (*is_shmem)(acanvas c);
  byte (*is_child)(acanvas c);
} acanvas_api_t, *acanvas_api;

/* draw api */
typedef struct{
  awindow (*window)(int x,int y, int w, int h);

} aui_api_t, *aui_api;

/* context */
typedef struct{
  acanvas_api   canvas;
  adraw_api     draw;
  aui_api       ui;
  amessage_api  message;
  astream_api   stream;
  autil_api     util;
} acontext_t, * acontext;


/* end of extern for cpp */
#ifdef __cplusplus
}
#endif
#endif /* __aroma_api_h__ */