From 43d472328c3ceebace932c3c203d3241663d616d Mon Sep 17 00:00:00 2001
From: "alexey.lysiuk" <alexey.lysiuk@gmail.com>
Date: Sun, 22 Jul 2018 11:16:48 +0300
Subject: [PATCH] - implemented vid_setsize CCMD in Cocoa backend

---
 src/posix/cocoa/gl_sysfb.h | 38 +++++++++++++++++++++++---------------
 src/posix/cocoa/i_video.mm | 35 +++++++++++++++++++++++++++++++++--
 2 files changed, 56 insertions(+), 17 deletions(-)

diff --git a/src/posix/cocoa/gl_sysfb.h b/src/posix/cocoa/gl_sysfb.h
index fc957a6412..9f82220139 100644
--- a/src/posix/cocoa/gl_sysfb.h
+++ b/src/posix/cocoa/gl_sysfb.h
@@ -57,6 +57,7 @@ public:
 	int GetClientWidth() override;
 	int GetClientHeight() override;
 	void ToggleFullscreen(bool yes) override;
+	void SetWindowSize(int width, int height) override;
 
 	void SetMode(bool fullscreen, bool hiDPI);
 
@@ -66,27 +67,34 @@ public:
 	static void SetWindowTitle(const char* title);
 
 protected:
-	CocoaWindow* m_window;
-
-	bool m_fullscreen;
-	bool m_hiDPI;
-
-	static const uint32_t GAMMA_CHANNEL_SIZE = 256;
-	static const uint32_t GAMMA_CHANNEL_COUNT = 3;
-	static const uint32_t GAMMA_TABLE_SIZE = GAMMA_CHANNEL_SIZE * GAMMA_CHANNEL_COUNT;
-
-	bool				m_supportsGamma;
-	uint16_t			m_originalGamma[GAMMA_TABLE_SIZE];
-
 	SystemGLFrameBuffer() {}
 
-	void SetFullscreenMode();
-	void SetWindowedMode();
-
 	void SwapBuffers();
 
 	void SetGammaTable(uint16_t* table);
 	void ResetGammaTable();
+
+	bool m_supportsGamma;
+
+private:
+	void SetFullscreenMode();
+	void SetWindowedMode();
+
+	bool m_fullscreen;
+	bool m_hiDPI;
+
+	CocoaWindow* m_window;
+
+	static const uint32_t GAMMA_CHANNEL_SIZE = 256;
+	static const uint32_t GAMMA_CHANNEL_COUNT = 3;
+	static const uint32_t GAMMA_TABLE_SIZE = GAMMA_CHANNEL_SIZE * GAMMA_CHANNEL_COUNT;
+
+	uint16_t m_originalGamma[GAMMA_TABLE_SIZE];
+
+	int GetTitleBarHeight() const;
+
+	static const int MINIMUM_WIDTH  = 320;
+	static const int MINIMUM_HEIGHT = 200;
 };
 
 #endif // COCOA_GL_SYSFB_H_INCLUDED
diff --git a/src/posix/cocoa/i_video.mm b/src/posix/cocoa/i_video.mm
index 03613636d5..d6e147cbba 100644
--- a/src/posix/cocoa/i_video.mm
+++ b/src/posix/cocoa/i_video.mm
@@ -319,9 +319,9 @@ static SystemGLFrameBuffer* frameBuffer;
 
 SystemGLFrameBuffer::SystemGLFrameBuffer(void*, const bool fullscreen)
 : DFrameBuffer(vid_defwidth, vid_defheight)
-, m_window(CreateWindow(STYLE_MASK_WINDOWED))
 , m_fullscreen(false)
 , m_hiDPI(false)
+, m_window(CreateWindow(STYLE_MASK_WINDOWED))
 {
 	SetFlash(0, 0);
 
@@ -388,6 +388,35 @@ void SystemGLFrameBuffer::ToggleFullscreen(bool yes)
 	SetMode(yes, m_hiDPI);
 }
 
+void SystemGLFrameBuffer::SetWindowSize(int width, int height)
+{
+	if (width < MINIMUM_WIDTH || height < MINIMUM_HEIGHT)
+	{
+		return;
+	}
+
+	if (fullscreen)
+	{
+		// Enter windowed mode in order to calculate title bar height
+		fullscreen = false;
+		SetMode(false, m_hiDPI);
+	}
+
+	win_w = width;
+	win_h = height + GetTitleBarHeight();
+
+	SetMode(false, m_hiDPI);
+}
+
+int SystemGLFrameBuffer::GetTitleBarHeight() const
+{
+	const NSRect windowFrame = [m_window frame];
+	const NSRect contentFrame = [m_window contentRectForFrameRect:windowFrame];
+	const int titleBarHeight = windowFrame.size.height - contentFrame.size.height;
+
+	return titleBarHeight;
+}
+
 
 void SystemGLFrameBuffer::SetVSync(bool vsync)
 {
@@ -465,7 +494,9 @@ void SystemGLFrameBuffer::SetWindowedMode()
 		[m_window setHidesOnDeactivate:NO];
 	}
 
-	const bool isFrameValid = win_x >= 0 && win_y >= 0 && win_w > 320 && win_h > 200;
+	const bool isFrameValid = win_x >= 0 && win_y >= 0
+		&& win_w >= MINIMUM_WIDTH
+		&& win_h - GetTitleBarHeight() >= MINIMUM_HEIGHT;
 	const NSRect frameSize = isFrameValid
 		? NSMakeRect(win_x, win_y, win_w, win_h)
 		: NSMakeRect(0, 0, vid_defwidth, vid_defheight);