void RE_InitOpenGl(void)
{
//Clear the screen with a black color thanks
Glimp_ClearScreen();
glConfig.driverType = GLDRV_ICD;
glConfig.hardwareType = GLHW_GENERIC;
// Get extension strings
#ifndef FEATURE_RENDERER2
Q_strncpyz(glConfig.extensions_string, ( char * ) glGetString(GL_EXTENSIONS), sizeof(glConfig.extensions_string));
#else
{
int i = 0, exts = 0;
glGetIntegerv(GL_NUM_EXTENSIONS, &exts);
glConfig.extensions_string[0] = 0;
for (i = 0; i < exts; i++)
{
if (strlen(glConfig.extensions_string) + 100 >= sizeof(glConfig.extensions_string))
{
//Just so we wont error out when there are really a lot of extensions
break;
}
Q_strcat(glConfig.extensions_string, sizeof(glConfig.extensions_string), va("%s ", glGetStringi(GL_EXTENSIONS, i)));
}
}
#endif
// initialize extensions
#ifdef FEATURE_RENDERER2
GLimp_InitExtensionsR2(); // renderer2
#else
GLimp_InitExtensions(); // vanilla renderer
#endif
}
/**
* @brief This routine is responsible for initializing the OS specific portions of OpenGL
*/
void GLimp_Init(void)
{
r_allowSoftwareGL = ri.Cvar_Get("r_allowSoftwareGL", "0", CVAR_LATCH);
r_allowResize = ri.Cvar_Get("r_allowResize", "0", CVAR_ARCHIVE);
r_centerWindow = ri.Cvar_Get("r_centerWindow", "0", CVAR_ARCHIVE);
if (ri.Cvar_VariableIntegerValue("com_abnormalExit"))
{
ri.Cvar_Set("r_mode", va("%d", R_MODE_FALLBACK));
ri.Cvar_Set("r_fullscreen", "0");
ri.Cvar_Set("r_centerWindow", "0");
ri.Cvar_Set("com_abnormalExit", "0");
}
ri.Sys_GLimpInit();
// Create the window and set up the context
if (GLimp_StartDriverAndSetMode(r_mode->integer, r_fullscreen->integer, r_noborder->integer))
{
goto success;
}
// Try again, this time in a platform specific "safe mode"
ri.Sys_GLimpSafeInit();
if (GLimp_StartDriverAndSetMode(r_mode->integer, r_fullscreen->integer, qfalse))
{
goto success;
}
// Finally, try the default screen resolution
if (r_mode->integer != R_MODE_FALLBACK)
{
Ren_Print("Setting r_mode %d failed, falling back on r_mode %d\n",
r_mode->integer, R_MODE_FALLBACK);
if (GLimp_StartDriverAndSetMode(R_MODE_FALLBACK, qfalse, qfalse))
{
goto success;
}
}
// Nothing worked, give up
Ren_Fatal("GLimp_Init() - could not load OpenGL subsystem\n");
success:
//Clear the screen with a black color thanks
Glimp_ClearScreen();
#ifdef FEATURE_RENDERER2
if (glConfig.driverType != GLDRV_OPENGL3)
{
glConfig.driverType = GLDRV_ICD;
}
#else
// This values force the UI to disable driver selection
glConfig.driverType = GLDRV_ICD;
#endif
glConfig.hardwareType = GLHW_GENERIC;
// Only using SDL_SetWindowBrightness to determine if hardware gamma is supported
glConfig.deviceSupportsGamma = !r_ignorehwgamma->integer &&
SDL_SetWindowBrightness(main_window, 1.0f) >= 0;
// Get extension strings
if (glConfig.driverType != GLDRV_OPENGL3)
{
Q_strncpyz(glConfig.extensions_string, ( char * ) glGetString(GL_EXTENSIONS), sizeof(glConfig.extensions_string));
}
#ifndef FEATURE_RENDERER_GLES
else
{
int i = 0, exts = 0;
glGetIntegerv(GL_NUM_EXTENSIONS, &exts);
glConfig.extensions_string[0] = 0;
for (i = 0; i < exts; i++)
{
if (strlen(glConfig.extensions_string) + 100 >= sizeof(glConfig.extensions_string))
{
//Just so we wont error out when there are really a lot of extensions
break;
}
Q_strcat(glConfig.extensions_string, sizeof(glConfig.extensions_string), va("%s ", glGetStringi(GL_EXTENSIONS, i)));
}
}
#endif // FEATURE_RENDERER_GLES
// initialize extensions
GLimp_SetHardware();
#ifdef FEATURE_RENDERER2
GLimp_InitExtensionsR2(); // renderer2
#else
GLimp_InitExtensions(); // vanilla renderer
#endif
ri.Cvar_Get("r_availableModes", "", CVAR_ROM);
// This depends on SDL_INIT_VIDEO, hence having it here
ri.IN_Init();
}