nanogl.cpp

   1 /*
   2 Copyright (C) 2007-2009 Olli Hinkka
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20
  21 #define LOG_TAG "nanoGL"
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25
  26
  27 //#include <cutils/log.h>
  28
  29 #include "nanogl.h"
  30 #include "glesinterface.h"
  31 #include "gl.h"
  32
  33
  34 #define DEBUG_NANO 0
  35
  36 #ifdef __ANDROID__
  37 #include <android/log.h>
  38 #define LOG __android_log_print
  39
  40 #define LOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)
  41 #define LOGD(...) if (DEBUG_NANO) __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG,__VA_ARGS__)
  42 #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,__VA_ARGS__)
  43 #define LOGW(...) __android_log_print(ANDROID_LOG_WARN, LOG_TAG,__VA_ARGS__)
  44 #else
  45 #ifndef _MSC_VER
  46 #define LOGI(...) printf("I: "__VA_ARGS__);printf("\n")
  47 #define LOGD(...) if(DEBUG_NANO) {printf("D: "__VA_ARGS__);printf("\n");}
  48 #define LOGE(...) printf("E: "__VA_ARGS__);printf("\n")
  49 #define LOGW(...) printf("W: "__VA_ARGS__);printf("\n")
  50 #else
  51 #define LOGI printf
  52 #define LOGD printf
  53 #define LOGE printf
  54 #define LOGW printf
  55
  56 #endif
  57 #endif
  58
  59 #ifdef _WIN32
  60 #include <windows.h>
  61 #define dlopen(x,y) LoadLibraryA(x)
  62 #define dlsym(x,y) (void*)GetProcAddress((HINSTANCE)x,y)
  63 #define dlclose(x) FreeLibrary((HINSTANCE)x)
  64 #else
  65 #include <dlfcn.h>
  66 #endif
  67
  68
  69 //#define GL_ENTRY(_r, _api, ...) #_api,
  70
  71 static char const * const gl_names[] = {
  72     #include "funcnames.h"
  73     NULL
  74 };
  75
  76 //const char * driver;
  77
  78 static void* glesLib = NULL;
  79
  80 GlESInterface* glEsImpl = NULL;
  81
  82 extern void InitGLStructs();
  83
  84 void APIENTRY gl_unimplemented(GLenum none) {
  85 #ifndef USE_CORE_PROFILE
  86         LOGE ("Called unimplemented OpenGL ES API\n");
  87 #endif
  88 }
  89
  90 void *nanoGL_GetProcAddress(const char *name)
  91 {
  92 #if defined(__MULTITEXTURE_SUPPORT__)
  93         if (!strcmp(procname, "glMultiTexCoord2fARB"))
  94         {
  95                 return (void*)&glMultiTexCoord2fARB;
  96         }
  97         else if (!strcmp(procname, "glActiveTextureARB"))
  98         {
  99                 return (void*)&glActiveTexture;
 100         }
 101         else if (!strcmp(procname, "glClientActiveTextureARB"))
 102         {
 103                 return (void*)&glClientActiveTexture;
 104         }
 105 #endif
 106         return dlsym(glesLib, name);
 107 }
 108
 109 static int CreateGlEsInterface( const char * name, void * lib, void * lib1, void * default_func )
 110 {
 111         // alloc space
 112         if ( !glEsImpl )
 113                 glEsImpl = (GlESInterface *) malloc(sizeof(GlESInterface));
 114
 115         if (!glEsImpl) {
 116         return 0;
 117     }
 118
 119         // load GL API calls
 120         char const * const * api;
 121         api = gl_names;
 122
 123         // nanoGL interface pointer
 124         void ** ptr = (void **)(glEsImpl);
 125
 126         while (*api)
 127         {
 128                 void * f;
 129
 130                 f = dlsym(lib, *api); // try libGLESxx_CM.so
 131
 132 #ifdef USE_CORE_PROFILE
 133                 // Hack: try ARB and EXT suffix
 134                 if (f == NULL) {
 135                         char namearb[256];
 136                         snprintf( namearb, 256, "%sARB", *api );
 137                         f = dlsym( lib, namearb );
 138                 }
 139                 if (f == NULL) {
 140                         char namearb[256];
 141                         snprintf( namearb, 256, "%sEXT", *api );
 142                         f = dlsym( lib, namearb );
 143                 }
 144 #endif
 145                 if (f == NULL) {
 146                         LOGW( "<%s> not found in %s. Trying libEGL.so.", *api, name); //driver);
 147
 148                         // try lib1
 149                         if ( lib1 ) {
 150                                 f = dlsym(lib1, *api); // libEGL.so
 151
 152                                 if ( f == NULL ) {
 153                                         LOGE ( "<%s> not found in libEGL.so", *api);
 154                                         f = default_func; //(void*)gl_unimplemented;
 155                                 }
 156                                 else {
 157                                         LOGD ("<%s> @ 0x%p\n", *api, f);
 158                                 }
 159                         }
 160                         else
 161                         {
 162                                 LOGE ( "libEGL.so not loaded!");
 163                                 f = default_func;
 164                         }
 165                 }
 166                 else {
 167                         LOGD ("<%s> @ 0x%p\n", *api, f);
 168                 }
 169
 170             *ptr++ = f;
 171         api++;
 172     }
 173
 174         return 1;
 175 }
 176
 177 // Load using the dynamic loader
 178 static int loadDriver(const char * name) {
 179         glesLib = dlopen(name, RTLD_NOW | RTLD_LOCAL);
 180         int rc = (glesLib) ? 1 : 0;
 181         return rc;
 182 }
 183
 184 /**
 185  * Init
 186  */
 187 #ifdef _WIN32
 188 int nanoGL_Init()
 189 {
 190         const char * lib1 = "opengl32.dll";     // Has both gl* & egl* funcs SDK < 1.5
 191         const char * lib2 = "opengl32.dll";     // Only gl* funcs SDK >= 1.5
 192         const char * lib3 = "opengl32.dll";             // Only egl* funcs SDK >= 1.5
 193         const char * driver;
 194
 195         // load lib
 196         LOGI("nanoGL: Init loading driver %s\n", lib1);
 197         //LOG (ANDROID_LOG_DEBUG, LOG_TAG, "nanoGL: Init loading driver %s\n", lib1);
 198
 199         if ( ! loadDriver(lib1) )
 200         {
 201                 LOGE("Failed to load driver %s. Trying %s\n", lib1, lib2);
 202
 203                 if ( ! loadDriver(lib2) ) {
 204                         LOGE ("Failed to load  %s.\n", lib2);
 205                         return 0;
 206                 }
 207                 else
 208                         driver = lib2;
 209         }
 210         else
 211                 driver = lib1;
 212
 213         void * eglLib;
 214
 215         //if ( strcmp(driver, lib2) == 0 ) {
 216                 LOGD ("**** Will Load EGL subs from %s ****", lib3);
 217
 218                 eglLib = dlopen(lib3, RTLD_NOW | RTLD_LOCAL);
 219
 220                 if ( ! eglLib ) {
 221                         LOGE ( "Failed to load %s", lib3);
 222                 }
 223         //}
 224
 225         // Load API gl* for 1.5+  else egl* gl*
 226         //if (CreateGlEsInterface(driver, glesLib, eglLib, NULL) == -1)
 227         if ( !CreateGlEsInterface(driver, glesLib, eglLib, (void *) gl_unimplemented) == -1)
 228     {
 229                 // release lib
 230                 LOGE ( "CreateGlEsInterface failed.");
 231
 232                 dlclose(glesLib);
 233             return 0;
 234     }
 235
 236         // Init nanoGL
 237         InitGLStructs();
 238         return 1;
 239 }
 240 #else
 241 int nanoGL_Init()
 242 {
 243         const char * lib1 = "libGLESv1_CM.so";  // Has both gl* & egl* funcs SDK < 1.5
 244         const char * lib2 = "libGLESv2.so";     // Only gl* funcs SDK >= 1.5
 245         const char * lib3 = "libEGL.so";                // Only egl* funcs SDK >= 1.5
 246         const char * driver;
 247
 248         // load lib
 249         LOGI("nanoGL: Init loading driver %s\n", lib1);
 250         //LOG (ANDROID_LOG_DEBUG, LOG_TAG, "nanoGL: Init loading driver %s\n", lib1);
 251
 252         if ( ! loadDriver(lib1) )
 253         {
 254                 LOGE("Failed to load driver %s. Trying %s\n", lib1, lib2);
 255
 256                 if ( ! loadDriver(lib2) ) {
 257                         LOGE ("Failed to load  %s.\n", lib2);
 258                         return 0;
 259                 }
 260                 else
 261                         driver = lib2;
 262         }
 263         else
 264                 driver = lib1;
 265
 266         void * eglLib;
 267
 268         //if ( strcmp(driver, lib2) == 0 ) {
 269                 LOGD ("**** Will Load EGL subs from %s ****", lib3);
 270
 271                 eglLib = dlopen(lib3, RTLD_NOW | RTLD_LOCAL);
 272
 273                 if ( ! eglLib ) {
 274                         LOGE ( "Failed to load %s", lib3);
 275                 }
 276         //}
 277
 278         // Load API gl* for 1.5+  else egl* gl*
 279         //if (CreateGlEsInterface(driver, glesLib, eglLib, NULL) == -1)
 280         if ( !CreateGlEsInterface(driver, glesLib, eglLib, (void *) gl_unimplemented) == -1)
 281     {
 282                 // release lib
 283                 LOGE ( "CreateGlEsInterface failed.");
 284
 285                 dlclose(glesLib);
 286             return 0;
 287     }
 288
 289         // Init nanoGL
 290         InitGLStructs();
 291         return 1;
 292 }
 293 #endif
 294 void nanoGL_Destroy()
 295 {
 296         LOGD ("nanoGL_Destroy");
 297
 298         if (glEsImpl) {
 299         free( glEsImpl);
 300         glEsImpl = NULL;
 301     }
 302
 303         // release lib
 304         dlclose(glesLib);
 305 }
 306