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         void *addr = NULL;
  93 #ifdef XASH_SDL
  94         addr = SDL_GL_GetProcAddress( name );
  95         if( !addr )
  96 #endif
  97         addr = dlsym(glesLib, name);
  98         return addr;
  99 }
 100
 101 static int CreateGlEsInterface( const char * name, void * lib, void * lib1, void * default_func )
 102 {
 103         // alloc space
 104         if ( !glEsImpl )
 105                 glEsImpl = (GlESInterface *) malloc(sizeof(GlESInterface));
 106
 107         if (!glEsImpl) {
 108         return 0;
 109     }
 110
 111         // load GL API calls
 112         char const * const * api;
 113         api = gl_names;
 114
 115         // nanoGL interface pointer
 116         void ** ptr = (void **)(glEsImpl);
 117
 118         while (*api)
 119         {
 120                 void * f;
 121
 122                 f = dlsym(lib, *api); // try libGLESxx_CM.so
 123
 124 #ifdef USE_CORE_PROFILE
 125                 // Hack: try ARB and EXT suffix
 126                 if (f == NULL) {
 127                         char namearb[256];
 128                         snprintf( namearb, 256, "%sARB", *api );
 129                         f = dlsym( lib, namearb );
 130                 }
 131                 if (f == NULL) {
 132                         char namearb[256];
 133                         snprintf( namearb, 256, "%sEXT", *api );
 134                         f = dlsym( lib, namearb );
 135                 }
 136 #endif
 137                 if (f == NULL) {
 138                         LOGW( "<%s> not found in %s. Trying libEGL.so.", *api, name); //driver);
 139
 140                         // try lib1
 141                         if ( lib1 ) {
 142                                 f = dlsym(lib1, *api); // libEGL.so
 143
 144                                 if ( f == NULL ) {
 145                                         LOGE ( "<%s> not found in libEGL.so", *api);
 146                     if( glEsImpl->eglGetProcAddress && ( (void*)glEsImpl->eglGetProcAddress != (void*)gl_unimplemented ) )
 147                         f = glEsImpl->eglGetProcAddress( *api );
 148                     if(f == NULL)
 149                         f = default_func; //(void*)gl_unimplemented;
 150
 151                                 }
 152                                 else {
 153                                         LOGD ("<%s> @ 0x%p\n", *api, f);
 154                                 }
 155                         }
 156                         else
 157                         {
 158                                 LOGE ( "libEGL.so not loaded!");
 159                             if( glEsImpl->eglGetProcAddress && ( (void*)glEsImpl->eglGetProcAddress != (void*)gl_unimplemented ) )
 160                                 f = glEsImpl->eglGetProcAddress( *api );
 161                 if( !f )
 162                                 f = default_func;
 163                         }
 164                 }
 165                 else {
 166                         LOGD ("<%s> @ 0x%p\n", *api, f);
 167                 }
 168
 169             *ptr++ = f;
 170         api++;
 171     }
 172
 173         return 1;
 174 }
 175
 176 // Load using the dynamic loader
 177 static int loadDriver(const char * name) {
 178         glesLib = dlopen(name, RTLD_NOW | RTLD_LOCAL);
 179         int rc = (glesLib) ? 1 : 0;
 180         return rc;
 181 }
 182
 183 /**
 184  * Init
 185  */
 186 #ifdef _WIN32
 187 int nanoGL_Init()
 188 {
 189         const char * lib1 = "opengl32.dll";     // Has both gl* & egl* funcs SDK < 1.5
 190         const char * lib2 = "opengl32.dll";     // Only gl* funcs SDK >= 1.5
 191         const char * lib3 = "opengl32.dll";             // Only egl* funcs SDK >= 1.5
 192         const char * driver;
 193
 194         // load lib
 195         LOGI("nanoGL: Init loading driver %s\n", lib1);
 196         //LOG (ANDROID_LOG_DEBUG, LOG_TAG, "nanoGL: Init loading driver %s\n", lib1);
 197
 198         if ( ! loadDriver(lib1) )
 199         {
 200                 LOGE("Failed to load driver %s. Trying %s\n", lib1, lib2);
 201
 202                 if ( ! loadDriver(lib2) ) {
 203                         LOGE ("Failed to load  %s.\n", lib2);
 204                         return 0;
 205                 }
 206                 else
 207                         driver = lib2;
 208         }
 209         else
 210                 driver = lib1;
 211
 212         void * eglLib;
 213
 214         //if ( strcmp(driver, lib2) == 0 ) {
 215                 LOGD ("**** Will Load EGL subs from %s ****", lib3);
 216
 217                 eglLib = dlopen(lib3, RTLD_NOW | RTLD_LOCAL);
 218
 219                 if ( ! eglLib ) {
 220                         LOGE ( "Failed to load %s", lib3);
 221                 }
 222         //}
 223
 224         // Load API gl* for 1.5+  else egl* gl*
 225         //if (CreateGlEsInterface(driver, glesLib, eglLib, NULL) == -1)
 226         if ( !CreateGlEsInterface(driver, glesLib, eglLib, (void *) gl_unimplemented) == -1)
 227     {
 228                 // release lib
 229                 LOGE ( "CreateGlEsInterface failed.");
 230
 231                 dlclose(glesLib);
 232             return 0;
 233     }
 234
 235         // Init nanoGL
 236         InitGLStructs();
 237         return 1;
 238 }
 239 #else
 240 int nanoGL_Init()
 241 {
 242         const char * lib1 = "libGLESv1_CM.so";  // Has both gl* & egl* funcs SDK < 1.5
 243         const char * lib2 = "libGLESv2.so";     // Only gl* funcs SDK >= 1.5
 244         const char * lib3 = "libEGL.so";                // Only egl* funcs SDK >= 1.5
 245         const char * driver;
 246
 247         // load lib
 248         LOGI("nanoGL: Init loading driver %s\n", lib1);
 249         //LOG (ANDROID_LOG_DEBUG, LOG_TAG, "nanoGL: Init loading driver %s\n", lib1);
 250
 251         if ( ! loadDriver(lib1) )
 252         {
 253                 LOGE("Failed to load driver %s. Trying %s\n", lib1, lib2);
 254
 255                 if ( ! loadDriver(lib2) ) {
 256                         LOGE ("Failed to load  %s.\n", lib2);
 257                         return 0;
 258                 }
 259                 else
 260                         driver = lib2;
 261         }
 262         else
 263                 driver = lib1;
 264
 265         void * eglLib;
 266
 267         //if ( strcmp(driver, lib2) == 0 ) {
 268                 LOGD ("**** Will Load EGL subs from %s ****", lib3);
 269
 270                 eglLib = dlopen(lib3, RTLD_NOW | RTLD_LOCAL);
 271
 272                 if ( ! eglLib ) {
 273                         LOGE ( "Failed to load %s", lib3);
 274                 }
 275         //}
 276
 277         // Load API gl* for 1.5+  else egl* gl*
 278         //if (CreateGlEsInterface(driver, glesLib, eglLib, NULL) == -1)
 279         if ( !CreateGlEsInterface(driver, glesLib, eglLib, (void *) gl_unimplemented) == -1)
 280     {
 281                 // release lib
 282                 LOGE ( "CreateGlEsInterface failed.");
 283
 284                 dlclose(glesLib);
 285             return 0;
 286     }
 287
 288         // Init nanoGL
 289         InitGLStructs();
 290         return 1;
 291 }
 292 #endif
 293 void nanoGL_Destroy()
 294 {
 295         LOGD ("nanoGL_Destroy");
 296
 297         if (glEsImpl) {
 298         free( glEsImpl);
 299         glEsImpl = NULL;
 300     }
 301
 302         // release lib
 303         dlclose(glesLib);
 304 }