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Added some checks on wglCreatContext to avoid problems (and 

SetLastErrors).
This commit is contained in:
Raphael Junqueira 2005-11-30 18:26:16 +01:00 committed by Alexandre Julliard
parent a03d64b1e5
commit 902edb117c
1 changed files with 33 additions and 22 deletions
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55
dlls/opengl32/wgl.c
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@ -165,6 +165,8 @@ HGLRC WINAPI wglCreateContext(HDC hdc)
int num;
XVisualInfo template;
Display *display = get_display( hdc );
int hdcPF = GetPixelFormat(hdc);
GLXFBConfig cur_cfg;
TRACE("(%p)\n", hdc);
@ -178,6 +180,36 @@ HGLRC WINAPI wglCreateContext(HDC hdc)
/* Need to set errors here */
return NULL;
}
if (0 >= hdcPF) {
SetLastError(ERROR_INVALID_PIXEL_FORMAT);
return NULL;
}
{
int nCfgs_fmt = 0;
GLXFBConfig* cfgs_fmt = NULL;
int value;
int gl_test = 0;
cfgs_fmt = glXGetFBConfigs(display, DefaultScreen(display), &nCfgs_fmt);
if (NULL == cfgs_fmt || 0 == nCfgs_fmt) {
ERR("Cannot get FB Configs, expect problems.\n");
SetLastError(ERROR_INVALID_PIXEL_FORMAT);
return NULL;
}
if (nCfgs_fmt < hdcPF) {
ERR("(%p): unexpected pixelFormat(%d) > nFormats(%d), returns NULL\n", hdc, hdcPF, nCfgs_fmt);
SetLastError(ERROR_INVALID_PIXEL_FORMAT);
return NULL;
}
cur_cfg = cfgs_fmt[hdcPF - 1];
gl_test = glXGetFBConfigAttrib(display, cur_cfg, GLX_FBCONFIG_ID, &value);
if (gl_test) {
ERR("Failed to retrieve FBCONFIG_ID from GLXFBConfig, expect problems.\n");
SetLastError(ERROR_INVALID_PIXEL_FORMAT);
return NULL;
}
XFree(cfgs_fmt);
}
/* The context will be allocated in the wglMakeCurrent call */
ENTER_GL();
@ -186,28 +218,7 @@ HGLRC WINAPI wglCreateContext(HDC hdc)
ret->hdc = hdc;
ret->display = display;
ret->vis = vis;
{
int hdcPF = GetPixelFormat(hdc);
int nCfgs_fmt = 0;
GLXFBConfig* cfgs_fmt = NULL;
GLXFBConfig cur_cfg;
int value;
int gl_test = 0;
cfgs_fmt = glXGetFBConfigs(display, DefaultScreen(display), &nCfgs_fmt);
if (NULL == cfgs_fmt || 0 == nCfgs_fmt) {
ERR("Cannot get FB Configs, expect problems.\n");
return NULL;
}
cur_cfg = cfgs_fmt[hdcPF - 1];
gl_test = glXGetFBConfigAttrib(display, cur_cfg, GLX_FBCONFIG_ID, &value);
if (gl_test) {
ERR("Failed to retrieve FBCONFIG_ID from GLXFBConfig, expect problems.\n");
return NULL;
}
ret->fb_conf = cur_cfg;
XFree(cfgs_fmt);
}
ret->fb_conf = cur_cfg;
TRACE(" creating context %p (GL context creation delayed)\n", ret);
return (HGLRC) ret;