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/*
* Copyright (C) 2011 The Android Open Source Project
*
* 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.
*/
#ifndef GL_UTILS_H
#define GL_UTILS_H
#include <assert.h>
#include <inttypes.h>
typedef enum {
GLES_1_1 = 1,
GLES_2_0 = 2,
MAX_GLES_VERSION //Must be last
} GLESVersion;
template <class T>
void swap(T& x,T& y) {
T temp;
temp = x;
x = y;
y = temp;
}
bool isPowerOf2(int num);
// <EGL/egl.h> defines many types as 'void*' while they're really
// implemented as unsigned integers. These convenience template functions
// help casting between them safely without generating compiler warnings.
inline void* SafePointerFromUInt(unsigned int handle) {
return (void*)(uintptr_t)(handle);
}
inline unsigned int SafeUIntFromPointer(const void* ptr) {
// Assertion error if the pointer contains a value that does not fit
// in an unsigned integer!
assert((uintptr_t)(ptr) == (unsigned int)(uintptr_t)(ptr));
return (unsigned int)(uintptr_t)(ptr);
}
#endif
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