Windows: Factor out GL backend

1 files changed, 97 insertions, 0 deletions

diff --git a/pugl/pugl_win.h b/pugl/pugl_win.h
new file mode 100644
index 0000000..edbd7c6
--- /dev/null
+++ b/pugl/pugl_win.h
@@ -0,0 +1,97 @@
+/*
+  Copyright 2012-2019 David Robillard <http://drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "pugl/pugl_internal_types.h"
+
+#include <windows.h>
+
+#include <stdbool.h>
+
+typedef PIXELFORMATDESCRIPTOR PuglWinPFD;
+
+struct PuglInternalsImpl {
+	PuglWinPFD   pfd;
+	int          pfId;
+	HWND         hwnd;
+	HDC          hdc;
+	const PuglBackend* backend;
+	PuglSurface* surface;
+	DWORD        refreshRate;
+	double       timerFrequency;
+	bool         flashing;
+	bool         resizing;
+	bool         mouseTracked;
+};
+
+static inline PuglWinPFD
+puglWinGetPixelFormatDescriptor(const PuglHints* const hints)
+{
+	const int rgbBits = hints->red_bits + hints->green_bits + hints->blue_bits;
+
+	PuglWinPFD pfd;
+	ZeroMemory(&pfd, sizeof(pfd));
+	pfd.nSize        = sizeof(pfd);
+	pfd.nVersion     = 1;
+	pfd.dwFlags      = PFD_DRAW_TO_WINDOW|PFD_SUPPORT_OPENGL;
+	pfd.dwFlags     |= hints->double_buffer ? PFD_DOUBLEBUFFER : 0;
+	pfd.iPixelType   = PFD_TYPE_RGBA;
+	pfd.cColorBits   = (BYTE)rgbBits;
+	pfd.cRedBits     = (BYTE)hints->red_bits;
+	pfd.cGreenBits   = (BYTE)hints->green_bits;
+	pfd.cBlueBits    = (BYTE)hints->blue_bits;
+	pfd.cAlphaBits   = (BYTE)hints->alpha_bits;
+	pfd.cDepthBits   = (BYTE)hints->depth_bits;
+	pfd.cStencilBits = (BYTE)hints->stencil_bits;
+	pfd.iLayerType   = PFD_MAIN_PLANE;
+	return pfd;
+}
+
+static inline PuglStatus
+puglWinCreateWindow(const PuglView* const view,
+                    const char* const     title,
+                    HWND* const           hwnd,
+                    HDC* const            hdc)
+{
+	const char* className = view->windowClass ? view->windowClass : "Pugl";
+
+	const unsigned winFlags =
+		(WS_CLIPCHILDREN | WS_CLIPSIBLINGS |
+		 (view->parent
+		  ? WS_CHILD
+		  : (WS_POPUPWINDOW | WS_CAPTION | WS_MINIMIZEBOX |
+		     (view->hints.resizable ? (WS_SIZEBOX | WS_MAXIMIZEBOX) : 0))));
+
+	const unsigned winExFlags =
+		WS_EX_NOINHERITLAYOUT | (view->parent ? 0u : WS_EX_APPWINDOW);
+
+	// Calculate total window size to accommodate requested view size
+	RECT wr = { 0, 0, view->width, view->height };
+	AdjustWindowRectEx(&wr, winFlags, FALSE, winExFlags);
+
+	// Create window and get drawing context
+	if (!(*hwnd = CreateWindowEx(winExFlags, className, title, winFlags,
+	                             CW_USEDEFAULT, CW_USEDEFAULT,
+	                             wr.right-wr.left, wr.bottom-wr.top,
+	                             (HWND)view->parent, NULL, NULL, NULL))) {
+		return PUGL_ERR_CREATE_WINDOW;
+	} else if (!(*hdc = GetDC(*hwnd))) {
+		DestroyWindow(*hwnd);
+		*hwnd = NULL;
+		return PUGL_ERR_CREATE_WINDOW;
+	}
+
+	return PUGL_SUCCESS;
+}