WINGDIAPI BOOL WINAPI wglMakeCurrent(HDC hdc, DHGLRC hglrc)
{
if (!gCurrentContextSet)
{
gCurrentContext = gContexts.end();
gCurrentContextSet = true;
}
if (!hdc || !hglrc)
{
gCurrentContext = gContexts.end();
return 1;
}
int rc = (int)hglrc;
if (gContexts.find(rc) == gCurrentContext)
{
return 1;
}
gCurrentContext = gContexts.find(rc);
auto &xCtxt = gContexts[rc];
OGL::State *pState = xCtxt.pState;
HWND hWnd = WindowFromDC(hdc);
RECT rect;
GetClientRect(hWnd, &rect);
int width = rect.right - rect.left;
int height = rect.bottom - rect.top;
SetOGL(pState);
OGL::GetDDProcTable().pfnBindContext(OGL::GetDDHandle(), NULL, hWnd, NULL, width, height);
// according to spec, only set current viewport to draw buffer dimensions if the context hasn't
// been initialized
if (!xCtxt.initialized)
{
pState->mViewport.x = 0;
pState->mViewport.y = 0;
pState->mViewport.width = width;
pState->mViewport.height = height;
pState->mScissor.x = 0;
pState->mScissor.y = 0;
pState->mScissor.width = width;
pState->mScissor.height = height;
xCtxt.initialized = true;
}
return 1;
}
Bool glXMakeContextCurrent(Display *pDisplay, GLXDrawable draw, GLXDrawable read, GLXContext ctx)
{
// unbind current context if NULL ctx passed in
if (ctx == NULL)
{
currentContext = contexts.end();
return 1;
}
auto *pState = reinterpret_cast<OGL::State *>(ctx);
if (contexts.find(pState) == currentContext)
{
return 1;
}
auto &xCtxt = contexts[pState];
xCtxt.drawable = draw;
SetOGL(pState);
GLuint width, height;
XWindowAttributes xWindowAttributes = { 0 };
SWRPBuffer *buf;
bool isDisplay;
switch (gDrawables[draw])
{
case X:
XGetWindowAttributes(pDisplay, draw, &xWindowAttributes);
width = xWindowAttributes.width;
height = xWindowAttributes.height;
isDisplay = true;
break;
case PBUFFER:
buf = (SWRPBuffer *)draw;
width = buf->width;
height = buf->height;
isDisplay = false;
break;
default:
assert(0 && "Invalid buffer type");
return 0;
}
// bind render target set to SWR pipeline
FrameBuffer *fb;
if (gDrawableBuffers.find(draw) == gDrawableBuffers.end())
{
// we haven't seen this drawable yet, create a new frame buffer
fb = new FrameBuffer();
fb->Initialize(width, height, draw, xCtxt.pDisplay, xCtxt.pVisInfo, isDisplay);
gDrawableBuffers[draw] = fb;
}
else
{
fb = gDrawableBuffers[draw];
}
OGL::GetDDProcTable().pfnSetRenderTarget(OGL::GetDDHandle(), fb->GetBackBuffer(), fb->GetDepthBuffer());
// according to spec, only set current viewport to draw buffer dimensions if the context hasn't
// been initialized
if (!xCtxt.initialized)
{
pState->mViewport.x = 0;
pState->mViewport.y = 0;
pState->mViewport.width = width;
pState->mViewport.height = height;
pState->mScissor.x = 0;
pState->mScissor.y = 0;
pState->mScissor.width = width;
pState->mScissor.height = height;
xCtxt.initialized = true;
}
currentContext = contexts.find(pState);
return 1;
}
