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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 <stdio.h>
#include <stdlib.h>
#ifdef GL_API
#undef GL_API
#endif
#define GL_API
#ifdef GL_APIENTRY
#undef GL_APIENTRY
#endif
#ifdef GL_APIENTRYP
#undef GL_APIENTRYP
#endif
#define GL_APIENTRYP
#ifndef ANDROID
#define GL_APIENTRY
#endif
#include <GLES/gl.h>
#include <GLES/glext.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#ifdef __cplusplus
extern "C" {
#endif
size_t glSizeof(GLenum type);
size_t glUtilsParamSize(GLenum param);
void glUtilsPackPointerData(unsigned char *dst, unsigned char *str,
int size, GLenum type, unsigned int stride,
unsigned int datalen);
void glUtilsWritePackPointerData(void* stream, unsigned char *src,
int size, GLenum type, unsigned int stride,
unsigned int datalen);
int glUtilsPixelBitSize(GLenum format, GLenum type);
void glUtilsPackStrings(char *ptr, char **strings, GLint *length, GLsizei count);
int glUtilsCalcShaderSourceLen(char **strings, GLint *length, GLsizei count);
#ifdef __cplusplus
};
#endif
namespace GLUtils {
template <class T> void minmax(T *indices, int count, int *min, int *max) {
*min = -1;
*max = -1;
T *ptr = indices;
for (int i = 0; i < count; i++) {
if (*min == -1 || *ptr < *min) *min = *ptr;
if (*max == -1 || *ptr > *max) *max = *ptr;
ptr++;
}
}
template <class T> void shiftIndices(T *indices, int count, int offset) {
T *ptr = indices;
for (int i = 0; i < count; i++) {
*ptr += offset;
ptr++;
}
}
template <class T> void shiftIndices(T *src, T *dst, int count, int offset)
{
for (int i = 0; i < count; i++) {
*dst = *src + offset;
dst++;
src++;
}
}
}; // namespace GLUtils
#endif
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