1 /*
   2  * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 #include <stdio.h>
  27 #include "splashscreen.h"
  28 
  29 extern void* SplashProcAddress(const char* name); /* in java_md.c */
  30 
  31 /*
  32  * Prototypes of pointers to functions in splashscreen shared lib
  33  */
  34 typedef int (*SplashLoadMemory_t)(void* pdata, int size);
  35 typedef int (*SplashLoadFile_t)(const char* filename);
  36 typedef void (*SplashInit_t)(void);
  37 typedef void (*SplashClose_t)(void);
  38 typedef void (*SplashSetFileJarName_t)(const char* fileName,
  39                                        const char* jarName);
  40 typedef void (*SplashSetScaleFactor_t)(float scaleFactor);
  41 typedef char* (*SplashGetScaledImageName_t)(const char* fileName,
  42                         const char* jarName, float* scaleFactor);
  43 
  44 /*
  45  * This macro invokes a function from the shared lib.
  46  * it locates a function with SplashProcAddress on demand.
  47  * if SplashProcAddress fails, def value is returned.
  48  *
  49  * it is further wrapped with INVOKEV (works with functions which return
  50  * void and INVOKE (for all other functions). INVOKEV looks a bit ugly,
  51  * that's due being unable to return a value of type void in C. INVOKEV
  52  * works around this by using semicolon instead of return operator.
  53  */
  54 #define _INVOKE(name,def,ret) \
  55     static void* proc = NULL; \
  56     if (!proc) { proc = SplashProcAddress(#name); } \
  57     if (!proc) { return def; } \
  58     ret ((name##_t)proc)
  59 
  60 #define INVOKE(name,def) _INVOKE(name,def,return)
  61 #define INVOKEV(name) _INVOKE(name, ,;)
  62 
  63 int     DoSplashLoadMemory(void* pdata, int size) {
  64     INVOKE(SplashLoadMemory,0)(pdata, size);
  65 }
  66 
  67 int     DoSplashLoadFile(const char* filename) {
  68     INVOKE(SplashLoadFile,0)(filename);
  69 }
  70 
  71 void    DoSplashInit(void) {
  72     INVOKEV(SplashInit)();
  73 }
  74 
  75 void    DoSplashClose(void) {
  76     INVOKEV(SplashClose)();
  77 }
  78 
  79 void    DoSplashSetFileJarName(const char* fileName, const char* jarName) {
  80     INVOKEV(SplashSetFileJarName)(fileName, jarName);
  81 }
  82 
  83 void    DoSplashSetScaleFactor(float scaleFactor) {
  84     INVOKEV(SplashSetScaleFactor)(scaleFactor);
  85 }
  86 
  87 char*    DoSplashGetScaledImageName(const char* fileName, const char* jarName,
  88                                     float* scaleFactor) {
  89     INVOKE(SplashGetScaledImageName, NULL)(fileName, jarName, scaleFactor);
  90 }