DHGLRC APIENTRY
DrvCreateLayerContext(
HDC hdc,
INT iLayerPlane )
{
return stw_create_context_attribs(hdc, iLayerPlane, 0, 1, 0, 0, WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB);
}
HGLRC WINAPI
wglCreateContextAttribsARB(HDC hDC, HGLRC hShareContext, const int *attribList)
{
int majorVersion = 1, minorVersion = 0, layerPlane = 0;
int contextFlags = 0x0;
int profileMask = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
int i;
BOOL done = FALSE;
/* parse attrib_list */
if (attribList) {
for (i = 0; !done && attribList[i]; i++) {
switch (attribList[i]) {
case WGL_CONTEXT_MAJOR_VERSION_ARB:
majorVersion = attribList[++i];
break;
case WGL_CONTEXT_MINOR_VERSION_ARB:
minorVersion = attribList[++i];
break;
case WGL_CONTEXT_LAYER_PLANE_ARB:
layerPlane = attribList[++i];
break;
case WGL_CONTEXT_FLAGS_ARB:
contextFlags = attribList[++i];
break;
case WGL_CONTEXT_PROFILE_MASK_ARB:
profileMask = attribList[++i];
break;
case 0:
/* end of list */
done = TRUE;
break;
default:
/* bad attribute */
SetLastError(ERROR_INVALID_PARAMETER);
return NULL;
}
}
}
/* check version (generate ERROR_INVALID_VERSION_ARB if bad) */
switch (majorVersion) {
case 1:
if (minorVersion < 0 || minorVersion > 5) {
SetLastError(ERROR_INVALID_VERSION_ARB);
return NULL;
}
break;
case 2:
if (minorVersion < 0 || minorVersion > 1) {
SetLastError(ERROR_INVALID_VERSION_ARB);
return NULL;
}
break;
case 3:
if (minorVersion < 0 || minorVersion > 3) {
SetLastError(ERROR_INVALID_VERSION_ARB);
return NULL;
}
break;
case 4:
if (minorVersion < 0 || minorVersion > 2) {
SetLastError(ERROR_INVALID_VERSION_ARB);
return NULL;
}
break;
default:
return NULL;
}
if ((contextFlags & WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) &&
majorVersion < 3) {
SetLastError(ERROR_INVALID_VERSION_ARB);
return NULL;
}
/* check profileMask */
if (profileMask != WGL_CONTEXT_CORE_PROFILE_BIT_ARB &&
profileMask != WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB) {
SetLastError(ERROR_INVALID_PROFILE_ARB);
return NULL;
}
return (HGLRC) stw_create_context_attribs(hDC, layerPlane,
(DHGLRC) (UINT_PTR) hShareContext,
majorVersion, minorVersion,
contextFlags, profileMask);
}
/**
* The implementation of this function is tricky. The OPENGL32.DLL library
* remaps the context IDs returned by our stw_create_context_attribs()
* function to different values returned to the caller of wglCreateContext().
* That is, DHGLRC (driver) handles are not equivalent to HGLRC (public)
* handles.
*
* So we need to generate a new HGLRC ID here. We do that by calling
* the regular wglCreateContext() function. Then, we replace the newly-
* created stw_context with a new stw_context that reflects the arguments
* to this function.
*/
HGLRC WINAPI
wglCreateContextAttribsARB(HDC hDC, HGLRC hShareContext, const int *attribList)
{
typedef HGLRC (*wglCreateContext_t)(HDC hdc);
typedef BOOL (*wglDeleteContext_t)(HGLRC hglrc);
HGLRC context;
static HMODULE opengl_lib = 0;
static wglCreateContext_t wglCreateContext_func = 0;
static wglDeleteContext_t wglDeleteContext_func = 0;
int majorVersion = 1, minorVersion = 0, layerPlane = 0;
int contextFlags = 0x0;
int profileMask = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
int i;
BOOL done = FALSE;
/* parse attrib_list */
if (attribList) {
for (i = 0; !done && attribList[i]; i++) {
switch (attribList[i]) {
case WGL_CONTEXT_MAJOR_VERSION_ARB:
majorVersion = attribList[++i];
break;
case WGL_CONTEXT_MINOR_VERSION_ARB:
minorVersion = attribList[++i];
break;
case WGL_CONTEXT_LAYER_PLANE_ARB:
layerPlane = attribList[++i];
break;
case WGL_CONTEXT_FLAGS_ARB:
contextFlags = attribList[++i];
break;
case WGL_CONTEXT_PROFILE_MASK_ARB:
profileMask = attribList[++i];
break;
case 0:
/* end of list */
done = TRUE;
break;
default:
/* bad attribute */
SetLastError(ERROR_INVALID_PARAMETER);
return 0;
}
}
}
/* check version (generate ERROR_INVALID_VERSION_ARB if bad) */
switch (majorVersion) {
case 1:
if (minorVersion < 0 || minorVersion > 5) {
SetLastError(ERROR_INVALID_VERSION_ARB);
return 0;
}
break;
case 2:
if (minorVersion < 0 || minorVersion > 1) {
SetLastError(ERROR_INVALID_VERSION_ARB);
return 0;
}
break;
case 3:
if (minorVersion < 0 || minorVersion > 3) {
SetLastError(ERROR_INVALID_VERSION_ARB);
return 0;
}
break;
case 4:
if (minorVersion < 0 || minorVersion > 2) {
SetLastError(ERROR_INVALID_VERSION_ARB);
return 0;
}
break;
default:
return 0;
}
if ((contextFlags & WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) &&
majorVersion < 3) {
SetLastError(ERROR_INVALID_VERSION_ARB);
return 0;
}
/* check profileMask */
if (profileMask != WGL_CONTEXT_CORE_PROFILE_BIT_ARB &&
profileMask != WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB) {
SetLastError(ERROR_INVALID_PROFILE_ARB);
return 0;
}
/* Get pointer to OPENGL32.DLL's wglCreate/DeleteContext() functions */
if (opengl_lib == 0) {
/* Open the OPENGL32.DLL library */
opengl_lib = LoadLibraryA("OPENGL32.DLL");
if (!opengl_lib) {
_debug_printf("wgl: LoadLibrary(OPENGL32.DLL) failed\n");
return 0;
}
/* Get pointer to wglCreateContext() function */
wglCreateContext_func = (wglCreateContext_t)
GetProcAddress(opengl_lib, "wglCreateContext");
if (!wglCreateContext_func) {
_debug_printf("wgl: failed to get wglCreateContext()\n");
return 0;
}
/* Get pointer to wglDeleteContext() function */
wglDeleteContext_func = (wglDeleteContext_t)
GetProcAddress(opengl_lib, "wglDeleteContext");
if (!wglDeleteContext_func) {
_debug_printf("wgl: failed to get wglDeleteContext()\n");
return 0;
}
}
/* Call wglCreateContext to get a valid context ID */
context = wglCreateContext_func(hDC);
if (context) {
/* Now replace the context we just created with a new one that reflects
* the attributes passed to this function.
*/
DHGLRC dhglrc, c, share_dhglrc = 0;
/* Convert public HGLRC to driver DHGLRC */
if (stw_dev && stw_dev->callbacks.wglCbGetDhglrc) {
dhglrc = stw_dev->callbacks.wglCbGetDhglrc(context);
if (hShareContext)
share_dhglrc = stw_dev->callbacks.wglCbGetDhglrc(hShareContext);
}
else {
/* not using ICD */
dhglrc = (DHGLRC) context;
share_dhglrc = (DHGLRC) hShareContext;
}
c = stw_create_context_attribs(hDC, layerPlane, share_dhglrc,
majorVersion, minorVersion,
contextFlags, profileMask,
dhglrc);
if (!c) {
wglDeleteContext_func(context);
context = 0;
}
}
return context;
}
