1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #ifndef __GL_UTILS_H__ 17 #define __GL_UTILS_H__ 18 19 #include <stdio.h> 20 #include <stdlib.h> 21 22 #ifdef GL_API 23 #undef GL_API 24 #endif 25 #define GL_API 26 27 #ifdef GL_APIENTRY 28 #undef GL_APIENTRY 29 #endif 30 31 #ifdef GL_APIENTRYP 32 #undef GL_APIENTRYP 33 #endif 34 #define GL_APIENTRYP 35 36 #ifndef ANDROID 37 #define GL_APIENTRY 38 #endif 39 40 #include <GLES/gl.h> 41 #include <GLES/glext.h> 42 #include <GLES2/gl2.h> 43 #include <GLES2/gl2ext.h> 44 45 #ifdef __cplusplus 46 extern "C" { 47 #endif 48 49 size_t glSizeof(GLenum type); 50 size_t glUtilsParamSize(GLenum param); 51 void glUtilsPackPointerData(unsigned char *dst, unsigned char *str, 52 int size, GLenum type, unsigned int stride, 53 unsigned int datalen); 54 void glUtilsWritePackPointerData(void* stream, unsigned char *src, 55 int size, GLenum type, unsigned int stride, 56 unsigned int datalen); 57 int glUtilsPixelBitSize(GLenum format, GLenum type); 58 void glUtilsPackStrings(char *ptr, char **strings, GLint *length, GLsizei count); 59 int glUtilsCalcShaderSourceLen(char **strings, GLint *length, GLsizei count); 60 #ifdef __cplusplus 61 }; 62 #endif 63 64 namespace GLUtils { 65 66 template <class T> void minmax(T *indices, int count, int *min, int *max) { 67 *min = -1; 68 *max = -1; 69 T *ptr = indices; 70 for (int i = 0; i < count; i++) { 71 if (*min == -1 || *ptr < *min) *min = *ptr; 72 if (*max == -1 || *ptr > *max) *max = *ptr; 73 ptr++; 74 } 75 } 76 77 template <class T> void shiftIndices(T *indices, int count, int offset) { 78 T *ptr = indices; 79 for (int i = 0; i < count; i++) { 80 *ptr += offset; 81 ptr++; 82 } 83 } 84 85 86 template <class T> void shiftIndices(T *src, T *dst, int count, int offset) 87 { 88 for (int i = 0; i < count; i++) { 89 *dst = *src + offset; 90 dst++; 91 src++; 92 } 93 } 94 }; // namespace GLUtils 95 #endif 96
