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                                         f = default_func; //(void*)gl_unimplemented;
 147                                 }
 148                                 else {
 149                                         LOGD ("<%s> @ 0x%p\n", *api, f);
 150                                 }
 151                         }
 152                         else
 153                         {
 154                                 LOGE ( "libEGL.so not loaded!");
 155                                 f = default_func;
 156                         }
 157                 }
 158                 else {
 159                         LOGD ("<%s> @ 0x%p\n", *api, f);
 160                 }
 161
 162             *ptr++ = f;
 163         api++;
 164     }
 165
 166         return 1;
 167 }
 168
 169 // Load using the dynamic loader
 170 static int loadDriver(const char * name) {
 171         glesLib = dlopen(name, RTLD_NOW | RTLD_LOCAL);
 172         int rc = (glesLib) ? 1 : 0;
 173         return rc;
 174 }
 175
 176 /**
 177  * Init
 178  */
 179 #ifdef _WIN32
 180 int nanoGL_Init()
 181 {
 182         const char * lib1 = "opengl32.dll";     // Has both gl* & egl* funcs SDK < 1.5
 183         const char * lib2 = "opengl32.dll";     // Only gl* funcs SDK >= 1.5
 184         const char * lib3 = "opengl32.dll";             // Only egl* funcs SDK >= 1.5
 185         const char * driver;
 186
 187         // load lib
 188         LOGI("nanoGL: Init loading driver %s\n", lib1);
 189         //LOG (ANDROID_LOG_DEBUG, LOG_TAG, "nanoGL: Init loading driver %s\n", lib1);
 190
 191         if ( ! loadDriver(lib1) )
 192         {
 193                 LOGE("Failed to load driver %s. Trying %s\n", lib1, lib2);
 194
 195                 if ( ! loadDriver(lib2) ) {
 196                         LOGE ("Failed to load  %s.\n", lib2);
 197                         return 0;
 198                 }
 199                 else
 200                         driver = lib2;
 201         }
 202         else
 203                 driver = lib1;
 204
 205         void * eglLib;
 206
 207         //if ( strcmp(driver, lib2) == 0 ) {
 208                 LOGD ("**** Will Load EGL subs from %s ****", lib3);
 209
 210                 eglLib = dlopen(lib3, RTLD_NOW | RTLD_LOCAL);
 211
 212                 if ( ! eglLib ) {
 213                         LOGE ( "Failed to load %s", lib3);
 214                 }
 215         //}
 216
 217         // Load API gl* for 1.5+  else egl* gl*
 218         //if (CreateGlEsInterface(driver, glesLib, eglLib, NULL) == -1)
 219         if ( !CreateGlEsInterface(driver, glesLib, eglLib, (void *) gl_unimplemented) == -1)
 220     {
 221                 // release lib
 222                 LOGE ( "CreateGlEsInterface failed.");
 223
 224                 dlclose(glesLib);
 225             return 0;
 226     }
 227
 228         // Init nanoGL
 229         InitGLStructs();
 230         return 1;
 231 }
 232 #else
 233 int nanoGL_Init()
 234 {
 235         const char * lib1 = "libGLESv1_CM.so";  // Has both gl* & egl* funcs SDK < 1.5
 236         const char * lib2 = "libGLESv2.so";     // Only gl* funcs SDK >= 1.5
 237         const char * lib3 = "libEGL.so";                // Only egl* funcs SDK >= 1.5
 238         const char * driver;
 239
 240         // load lib
 241         LOGI("nanoGL: Init loading driver %s\n", lib1);
 242         //LOG (ANDROID_LOG_DEBUG, LOG_TAG, "nanoGL: Init loading driver %s\n", lib1);
 243
 244         if ( ! loadDriver(lib1) )
 245         {
 246                 LOGE("Failed to load driver %s. Trying %s\n", lib1, lib2);
 247
 248                 if ( ! loadDriver(lib2) ) {
 249                         LOGE ("Failed to load  %s.\n", lib2);
 250                         return 0;
 251                 }
 252                 else
 253                         driver = lib2;
 254         }
 255         else
 256                 driver = lib1;
 257
 258         void * eglLib;
 259
 260         //if ( strcmp(driver, lib2) == 0 ) {
 261                 LOGD ("**** Will Load EGL subs from %s ****", lib3);
 262
 263                 eglLib = dlopen(lib3, RTLD_NOW | RTLD_LOCAL);
 264
 265                 if ( ! eglLib ) {
 266                         LOGE ( "Failed to load %s", lib3);
 267                 }
 268         //}
 269
 270         // Load API gl* for 1.5+  else egl* gl*
 271         //if (CreateGlEsInterface(driver, glesLib, eglLib, NULL) == -1)
 272         if ( !CreateGlEsInterface(driver, glesLib, eglLib, (void *) gl_unimplemented) == -1)
 273     {
 274                 // release lib
 275                 LOGE ( "CreateGlEsInterface failed.");
 276
 277                 dlclose(glesLib);
 278             return 0;
 279     }
 280
 281         // Init nanoGL
 282         InitGLStructs();
 283         return 1;
 284 }
 285 #endif
 286 void nanoGL_Destroy()
 287 {
 288         LOGD ("nanoGL_Destroy");
 289
 290         if (glEsImpl) {
 291         free( glEsImpl);
 292         glEsImpl = NULL;
 293     }
 294
 295         // release lib
 296         dlclose(glesLib);
 297 }