--- /dev/null
+/*
+* 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