SDL: Add basic abstraction class for the SDL window.

1 files changed, 155 insertions, 0 deletions

diff --git a/backends/platform/sdl/sdl-window.cpp b/backends/platform/sdl/sdl-window.cpp
new file mode 100644
index 0000000000..b8cf4cfb4d
--- /dev/null
+++ b/backends/platform/sdl/sdl-window.cpp
@@ -0,0 +1,155 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#define FORBIDDEN_SYMBOL_ALLOW_ALL
+
+#include "backends/platform/sdl/sdl-window.h"
+
+SdlWindow::SdlWindow()
+#if SDL_VERSION_ATLEAST(2, 0, 0)
+	: _window(nullptr), _inputGrabState(false), _windowCaption("ScummVM"), _windowIcon(nullptr)
+#endif
+	{
+}
+
+SdlWindow::~SdlWindow() {
+#if SDL_VERSION_ATLEAST(2, 0, 0)
+	SDL_FreeSurface(_windowIcon);
+	destroyWindow();
+#endif
+}
+
+void SdlWindow::setWindowCaption(const Common::String &caption) {
+#if SDL_VERSION_ATLEAST(2, 0, 0)
+	_windowCaption = caption;
+	if (_window) {
+		SDL_SetWindowTitle(_window, caption.c_str());
+	}
+#else
+	SDL_WM_SetCaption(caption.c_str(), caption.c_str());
+#endif
+}
+
+void SdlWindow::setWindowIcon(SDL_Surface *icon) {
+#if SDL_VERSION_ATLEAST(2, 0, 0)
+	SDL_FreeSurface(_windowIcon);
+	_windowIcon = icon;
+	if (_window) {
+		SDL_SetWindowIcon(_window, icon);
+	}
+#else
+	SDL_WM_SetIcon(icon, NULL);
+	SDL_FreeSurface(icon);
+#endif
+}
+
+void SdlWindow::toggleMouseGrab() {
+#if SDL_VERSION_ATLEAST(2, 0, 0)
+	if (_window) {
+		_inputGrabState = !(SDL_GetWindowGrab(_window) == SDL_TRUE);
+		SDL_SetWindowGrab(_window, _inputGrabState ? SDL_TRUE : SDL_FALSE);
+	}
+#else
+	if (SDL_WM_GrabInput(SDL_GRAB_QUERY) == SDL_GRAB_OFF) {
+		SDL_WM_GrabInput(SDL_GRAB_ON);
+	} else {
+		SDL_WM_GrabInput(SDL_GRAB_OFF);
+	}
+#endif
+}
+
+bool SdlWindow::hasMouseFocus() const {
+#if SDL_VERSION_ATLEAST(2, 0, 0)
+	if (_window) {
+		return (SDL_GetWindowFlags(_window) & SDL_WINDOW_MOUSE_FOCUS);
+	} else {
+		return false;
+	}
+#else
+	return (SDL_GetAppState() & SDL_APPMOUSEFOCUS);
+#endif
+}
+
+void SdlWindow::warpMouseInWindow(uint x, uint y) {
+#if SDL_VERSION_ATLEAST(2, 0, 0)
+	if (_window) {
+		SDL_WarpMouseInWindow(_window, x, y);
+	}
+#else
+	SDL_WarpMouse(x, y);
+#endif
+}
+
+void SdlWindow::iconifyWindow() {
+#if SDL_VERSION_ATLEAST(2, 0, 0)
+	if (_window) {
+		SDL_MinimizeWindow(_window);
+	}
+#else
+	SDL_WM_IconifyWindow();
+#endif
+}
+
+#if SDL_VERSION_ATLEAST(2, 0, 0)
+SDL_Surface *copySDLSurface(SDL_Surface *src) {
+	const bool locked = SDL_MUSTLOCK(src) == SDL_TRUE;
+
+	if (locked) {
+		if (SDL_LockSurface(src) != 0) {
+			return nullptr;
+		}
+	}
+
+	SDL_Surface *res = SDL_CreateRGBSurfaceFrom(src->pixels,
+	                       src->w, src->h, src->format->BitsPerPixel,
+	                       src->pitch, src->format->Rmask, src->format->Gmask,
+	                       src->format->Bmask, src->format->Amask);
+
+	if (locked) {
+		SDL_UnlockSurface(src);
+	}
+
+	return res;
+}
+
+bool SdlWindow::createWindow(int width, int height, uint32 flags) {
+	destroyWindow();
+
+	if (_inputGrabState) {
+		flags |= SDL_WINDOW_INPUT_GRABBED;
+	}
+
+	_window = SDL_CreateWindow(_windowCaption.c_str(), SDL_WINDOWPOS_UNDEFINED,
+	                           SDL_WINDOWPOS_UNDEFINED, width, height, flags);
+	if (!_window) {
+		return false;
+	}
+	SDL_SetWindowIcon(_window, _windowIcon);
+
+	return true;
+}
+
+void SdlWindow::destroyWindow() {
+	SDL_DestroyWindow(_window);
+	_window = nullptr;
+}
+#endif