Codechange: [Win32] Move the global video buffer pointer into the driver class.

src/video/win32_v.cpp

@@ -41,7 +41,6 @@
 #endif
 
 static struct {
-	void *buffer_bits;    ///< Internal rendering buffer.
 	int width;            ///< Width in pixels of our display surface.
 	int height;           ///< Height in pixels of our display surface.
 	int width_org;        ///< Original monitor resolution width, before we changed it.
@@ -1112,7 +1111,9 @@ float VideoDriver_Win32Base::GetDPIScale()
 bool VideoDriver_Win32Base::LockVideoBuffer()
 {
 	if (_draw_threaded) this->draw_lock.lock();
-	_screen.dst_ptr = _wnd.buffer_bits;
+
+	_screen.dst_ptr = this->GetVideoPointer();
+
 	return true;
 }
 
@@ -1172,14 +1173,14 @@ bool VideoDriver_Win32GDI::AllocateBackingStore(int w, int h, bool force)
 	if (this->dib_sect) DeleteObject(this->dib_sect);
 
 	HDC dc = GetDC(0);
-	this->dib_sect = CreateDIBSection(dc, bi, DIB_RGB_COLORS, (VOID **)&_wnd.buffer_bits, nullptr, 0);
+	this->dib_sect = CreateDIBSection(dc, bi, DIB_RGB_COLORS, (VOID **)&this->buffer_bits, nullptr, 0);
 	if (this->dib_sect == nullptr) usererror("CreateDIBSection failed");
 	ReleaseDC(0, dc);
 
 	_screen.width = w;
 	_screen.pitch = (bpp == 8) ? Align(w, 4) : w;
 	_screen.height = h;
-	_screen.dst_ptr = _wnd.buffer_bits;
+	_screen.dst_ptr = this->GetVideoPointer();
 
 	return true;
 }
@@ -1307,11 +1308,11 @@ void VideoDriver_Win32GDI::PaintThread()
 {
 	static int _fooctr;
 
-	_screen.dst_ptr = _wnd.buffer_bits;
-	UpdateWindows();
-
 	VideoDriver_Win32GDI *drv = static_cast<VideoDriver_Win32GDI *>(VideoDriver::GetInstance());
 
+	_screen.dst_ptr = drv->GetVideoPointer();
+	UpdateWindows();
+
 	drv->Paint();
 	GdiFlush();
 
@@ -1445,10 +1446,12 @@ bool VideoDriver_Win32OpenGL::AllocateBackingStore(int w, int h, bool force)
 	if (this->gl_rc == nullptr) return false;
 
 	this->dirty_rect = {};
+	return OpenGLBackend::Get()->Resize(w, h, force);
+}
 
-	bool res = OpenGLBackend::Get()->Resize(w, h);
+void *VideoDriver_Win32OpenGL::GetVideoPointer()
-	_wnd.buffer_bits = OpenGLBackend::Get()->GetVideoBuffer();
+{
-	return res;
+	return OpenGLBackend::Get()->GetVideoBuffer();
 }
 
 void VideoDriver_Win32OpenGL::Paint()

src/video/win32_v.h

@@ -55,6 +55,8 @@ protected:
 	virtual uint8 GetFullscreenBpp();
 	/** (Re-)create the backing store. */
 	virtual bool AllocateBackingStore(int w, int h, bool force = false) = 0;
+	/** Get a pointer to the video buffer. */
+	virtual void *GetVideoPointer() = 0;
 	/** Palette of the window has changed. */
 	virtual void PaletteChanged(HWND hWnd) = 0;
 
@@ -68,7 +70,7 @@ private:
 /** The GDI video driver for windows. */
 class VideoDriver_Win32GDI : public VideoDriver_Win32Base {
 public:
-	VideoDriver_Win32GDI() : dib_sect(nullptr), gdi_palette(nullptr) {}
+	VideoDriver_Win32GDI() : dib_sect(nullptr), gdi_palette(nullptr), buffer_bits(nullptr) {}
 
 	const char *Start(const StringList &param) override;
 
@@ -81,8 +83,10 @@ public:
 protected:
 	HBITMAP  dib_sect;      ///< System bitmap object referencing our rendering buffer.
 	HPALETTE gdi_palette;   ///< Palette object for 8bpp blitter.
+	void     *buffer_bits;  ///< Internal rendering buffer.
 
 	void Paint() override;
+	void *GetVideoPointer() override { return this->buffer_bits; }
 	void PaintThread() override;
 
 	bool AllocateBackingStore(int w, int h, bool force = false) override;
@@ -130,6 +134,7 @@ protected:
 	void PaintThread() override {}
 
 	bool AllocateBackingStore(int w, int h, bool force = false) override;
+	void *GetVideoPointer() override;
 	void PaletteChanged(HWND hWnd) override {}
 
 	const char *AllocateContext();