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GLFactory.c
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GLFactory.c
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/*
* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#include <jni.h>
#include <stdlib.h>
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "PrismES2Defs.h"
/*
* strJavaToC
*
* Returns a copy of the specified Java String object as a new,
* null-terminated "C" string. The caller must free this string.
*/
char *strJavaToC(JNIEnv *env, jstring str)
{
const char *strUTFBytes; /* Array of UTF-8 bytes */
char *cString = NULL; /* Null-terminated "C" string */
if (str == NULL) {
return NULL;
}
strUTFBytes = (*env)->GetStringUTFChars(env, str, NULL);
if (strUTFBytes == NULL) {
/* Just return, since GetStringUTFChars will throw OOM if it returns NULL */
return NULL;
}
#if WIN32
cString = _strdup(strUTFBytes);
#else
cString = strdup(strUTFBytes);
#endif
(*env)->ReleaseStringUTFChars(env, str, strUTFBytes);
if (cString == NULL) {
fprintf(stderr, "Out Of Memory Error");
return NULL;
}
return cString;
}
/*
* Extract the version numbers from a copy of the version string.
* Upon return, numbers[0] contains major version number
* numbers[1] contains minor version number
* Note that the passed in version string is modified.
*/
void extractVersionInfo(char *versionStr, int *numbers)
{
char *majorNumStr;
char *minorNumStr;
char *next_token = NULL;
if ((versionStr == NULL) || (numbers == NULL)) {
return;
}
numbers[0] = numbers[1] = -1;
#if WIN32
majorNumStr = strtok_s(versionStr, (char *)".", &next_token);
minorNumStr = strtok_s(0, (char *)".", &next_token);
#else
majorNumStr = strtok(versionStr, (char *)".");
minorNumStr = strtok(0, (char *)".");
#endif
if (majorNumStr != NULL)
numbers[0] = atoi(majorNumStr);
if (minorNumStr != NULL)
numbers[1] = atoi(minorNumStr);
}
/*
* check if the extension is supported
*/
int isExtensionSupported(const char *allExtensions, const char *extension)
{
const char *start;
const char *where, *terminator;
if ((allExtensions == NULL) || (extension == NULL)) {
return 0;
}
/* Extension names should not have spaces. */
where = (const char *) strchr(extension, ' ');
if (where || *extension == '\0')
return 0;
/*
* It takes a bit of care to be fool-proof about parsing the
* OpenGL extensions string. Don't be fooled by sub-strings,
* etc.
*/
start = allExtensions;
for (;;) {
where = (const char *) strstr((const char *) start, extension);
if (!where)
break;
terminator = where + strlen(extension);
if (where == start || *(where - 1) == ' ')
if (*terminator == ' ' || *terminator == '\0')
return 1;
start = terminator;
}
return 0;
}
/*
* Class: com_sun_prism_es2_GLFactory
* Method: nIsGLExtensionSupported
* Signature: (Ljava/lang/String;)Z
*/
JNIEXPORT jboolean JNICALL Java_com_sun_prism_es2_GLFactory_nIsGLExtensionSupported
(JNIEnv *env, jclass class, jlong nativeCtxInfo, jstring glExtStr) {
char *extStr;
jboolean result;
ContextInfo *ctxInfo = (ContextInfo *) jlong_to_ptr(nativeCtxInfo);
if ((ctxInfo == NULL) || (glExtStr == NULL)) {
return JNI_FALSE;
}
extStr = strJavaToC(env, glExtStr);
result = isExtensionSupported(ctxInfo->glExtensionStr, extStr) ? JNI_TRUE : JNI_FALSE;
if (extStr != NULL) {
free(extStr);
}
return result;
}
/*
* Class: com_sun_prism_es2_GLFactory
* Method: nGetGLVendor
* Signature: (J)Ljava/lang/String;
*/
JNIEXPORT jstring JNICALL Java_com_sun_prism_es2_GLFactory_nGetGLVendor
(JNIEnv *env, jclass class, jlong nativeCtxInfo) {
ContextInfo *ctxInfo = (ContextInfo *) jlong_to_ptr(nativeCtxInfo);
if (ctxInfo == NULL) {
return NULL;
}
return (*env)->NewStringUTF(env, ctxInfo->vendorStr);
}
/*
* Class: com_sun_prism_es2_GLFactory
* Method: nGetGLRenderer
* Signature: (J)Ljava/lang/String;
*/
JNIEXPORT jstring JNICALL Java_com_sun_prism_es2_GLFactory_nGetGLRenderer
(JNIEnv *env, jclass class, jlong nativeCtxInfo) {
ContextInfo *ctxInfo = (ContextInfo *) jlong_to_ptr(nativeCtxInfo);
if ((ctxInfo == NULL) || (ctxInfo->rendererStr == NULL)) {
return NULL;
}
return (*env)->NewStringUTF(env, ctxInfo->rendererStr);
}
/*
* Class: com_sun_prism_es2_GLFactory
* Method: nGetGLVersion
* Signature: (J)Ljava/lang/String;
*/
JNIEXPORT jstring JNICALL Java_com_sun_prism_es2_GLFactory_nGetGLVersion
(JNIEnv *env, jclass class, jlong nativeCtxInfo) {
ContextInfo *ctxInfo = (ContextInfo *) jlong_to_ptr(nativeCtxInfo);
if ((ctxInfo == NULL) || (ctxInfo->versionStr == NULL)) {
return NULL;
}
return (*env)->NewStringUTF(env, ctxInfo->versionStr);
}