CStdGLCtx *CStdGL::CreateContext(HWND hWindow, C4AbstractApp *pApp)
{
// safety
if (!hWindow) return NULL;
// create it
CStdGLCtx *pCtx = new CStdGLCtx();
if (!pCtx->Init(NULL, pApp, hWindow))
{
delete pCtx; Error(" gl: Error creating secondary context!"); return NULL;
}
if (Config.Graphics.DebugOpenGL && glDebugMessageCallbackARB)
{
glDebugMessageCallbackARB(&OpenGLDebugProc, nullptr);
glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
}
if (!pMainCtx)
{
pMainCtx = pCtx;
}
else
{
// creation selected the new context - switch back to previous context
RenderTarget = NULL;
pCurrCtx = NULL;
}
// done
return pCtx;
}
CStdGLCtx *CStdGL::CreateContext(C4Window * pWindow, C4AbstractApp *pApp)
{
// safety
if (!pWindow) return NULL;
// create it
CStdGLCtx *pCtx = new CStdGLCtx();
bool first_ctx = !pMainCtx;
if (first_ctx)
{
pMainCtx = pCtx;
LogF(" gl: Create first %scontext...", Config.Graphics.DebugOpenGL ? "debug " : "");
}
bool success = pCtx->Init(pWindow, pApp);
if (Config.Graphics.DebugOpenGL && glDebugMessageCallbackARB)
{
if (first_ctx) Log(" gl: Setting OpenGLDebugProc callback");
glDebugMessageCallbackARB(&OpenGLDebugProc, nullptr);
glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
#ifdef GL_KHR_debug
if (GLEW_KHR_debug)
glEnable(GL_DEBUG_OUTPUT);
#endif
}
// First context: Log some information about hardware/drivers
// Must log after context creation to get valid results
if (first_ctx)
{
const char *gl_vendor = reinterpret_cast<const char *>(glGetString(GL_VENDOR));
const char *gl_renderer = reinterpret_cast<const char *>(glGetString(GL_RENDERER));
const char *gl_version = reinterpret_cast<const char *>(glGetString(GL_VERSION));
LogF("GL %s on %s (%s)", gl_version ? gl_version : "", gl_renderer ? gl_renderer : "", gl_vendor ? gl_vendor : "");
if (Config.Graphics.DebugOpenGL)
{
// Dump extension list
if (glGetStringi)
{
GLint gl_extension_count = 0;
glGetIntegerv(GL_NUM_EXTENSIONS, &gl_extension_count);
if (gl_extension_count == 0)
{
LogSilentF("No available extensions.");
}
else
{
LogSilentF("%d available extensions:", gl_extension_count);
for (GLint i = 0; i < gl_extension_count; ++i)
{
const char *gl_extension = (const char*)glGetStringi(GL_EXTENSIONS, i);
LogSilentF(" %4d: %s", i, gl_extension);
}
}
}
else
{
const char *gl_extensions = reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS));
LogSilentF("GLExt: %s", gl_extensions ? gl_extensions : "");
}
}
}
if (!success)
{
delete pCtx; Error(" gl: Error creating secondary context!"); return NULL;
}
// creation selected the new context - switch back to previous context
RenderTarget = NULL;
pCurrCtx = NULL;
// done
return pCtx;
}