Move platform stub configuration code to platform headers

This allows backends which use basic software rendering (like Cairo) to share
the common basic window format setup code.

4 files changed, 43 insertions, 33 deletions

diff --git a/pugl/detail/win.h b/pugl/detail/win.h
index 6d89759..e9056b7 100644
--- a/pugl/detail/win.h
+++ b/pugl/detail/win.h
@@ -113,3 +113,27 @@ puglWinCreateWindow(const PuglView* const view,
 
 	return PUGL_SUCCESS;
 }
+
+static inline PuglStatus
+puglWinStubConfigure(PuglView* view)
+{
+	PuglInternals* const impl = view->impl;
+	PuglStatus           st   = PUGL_SUCCESS;
+
+	if ((st = puglWinCreateWindow(view, "Pugl", &impl->hwnd, &impl->hdc))) {
+		return st;
+	}
+
+	impl->pfd  = puglWinGetPixelFormatDescriptor(view->hints);
+	impl->pfId = ChoosePixelFormat(impl->hdc, &impl->pfd);
+
+	if (!SetPixelFormat(impl->hdc, impl->pfId, &impl->pfd)) {
+		ReleaseDC(impl->hwnd, impl->hdc);
+		DestroyWindow(impl->hwnd);
+		impl->hwnd = NULL;
+		impl->hdc  = NULL;
+		return PUGL_SET_FORMAT_FAILED;
+	}
+
+	return PUGL_SUCCESS;
+}
diff --git a/pugl/detail/win_cairo.c b/pugl/detail/win_cairo.c
index 497711b..27765ec 100644
--- a/pugl/detail/win_cairo.c
+++ b/pugl/detail/win_cairo.c
@@ -80,28 +80,14 @@ puglWinCairoDestroyDrawContext(PuglView* view)
 static PuglStatus
 puglWinCairoConfigure(PuglView* view)
 {
-	PuglInternals* const impl = view->impl;
-	PuglStatus           st   = PUGL_SUCCESS;
+	const PuglStatus st = puglWinStubConfigure(view);
 
-	if ((st = puglWinCreateWindow(view, "Pugl", &impl->hwnd, &impl->hdc))) {
-		return st;
-	}
-
-	impl->pfd  = puglWinGetPixelFormatDescriptor(view->hints);
-	impl->pfId = ChoosePixelFormat(impl->hdc, &impl->pfd);
-
-	if (!SetPixelFormat(impl->hdc, impl->pfId, &impl->pfd)) {
-		ReleaseDC(impl->hwnd, impl->hdc);
-		DestroyWindow(impl->hwnd);
-		impl->hwnd = NULL;
-		impl->hdc  = NULL;
-		return PUGL_SET_FORMAT_FAILED;
+	if (!st) {
+		view->impl->surface = (PuglWinCairoSurface*)calloc(
+			1, sizeof(PuglWinCairoSurface));
 	}
 
-	impl->surface = (PuglWinCairoSurface*)calloc(
-		1, sizeof(PuglWinCairoSurface));
-
-	return PUGL_SUCCESS;
+	return st;
 }
 
 static PuglStatus
diff --git a/pugl/detail/x11.h b/pugl/detail/x11.h
index bfdbf60..d7990ca 100644
--- a/pugl/detail/x11.h
+++ b/pugl/detail/x11.h
@@ -49,3 +49,16 @@ struct PuglInternalsImpl {
 	PuglEvent    pendingConfigure;
 	PuglEvent    pendingExpose;
 };
+
+static inline PuglStatus
+puglX11StubConfigure(PuglView* view)
+{
+	PuglInternals* const impl = view->impl;
+	XVisualInfo          pat  = {0};
+	int                  n    = 0;
+
+	pat.screen = impl->screen;
+	impl->vi   = XGetVisualInfo(impl->display, VisualScreenMask, &pat, &n);
+
+	return PUGL_SUCCESS;
+}
diff --git a/pugl/detail/x11_cairo.c b/pugl/detail/x11_cairo.c
index 0753317..1c7df6e 100644
--- a/pugl/detail/x11_cairo.c
+++ b/pugl/detail/x11_cairo.c
@@ -39,19 +39,6 @@ typedef struct  {
 } PuglX11CairoSurface;
 
 static PuglStatus
-puglX11CairoConfigure(PuglView* view)
-{
-	PuglInternals* const impl = view->impl;
-
-	XVisualInfo pat;
-	int         n;
-	pat.screen = impl->screen;
-	impl->vi = XGetVisualInfo(impl->display, VisualScreenMask, &pat, &n);
-
-	return PUGL_SUCCESS;
-}
-
-static PuglStatus
 puglX11CairoCreate(PuglView* view)
 {
 	PuglInternals* const impl    = view->impl;
@@ -163,7 +150,7 @@ const PuglBackend*
 puglCairoBackend(void)
 {
 	static const PuglBackend backend = {
-		puglX11CairoConfigure,
+		puglX11StubConfigure,
 		puglX11CairoCreate,
 		puglX11CairoDestroy,
 		puglX11CairoEnter,