gsdx-linux: add a basic implementation to record the gameplay as png file

The idea was to merge them later with ffmpeg or other external tool

It kinds of work but current fps is around 2 !!! So not really usable

The speed issue is related to PNG.

So either the code to store pixels data must be optimized. Or maybe it misses some MT loves :)

plugins/GSdx/GSCapture.cpp

@@ -21,6 +21,10 @@
 
 #include "stdafx.h"
 #include "GSCapture.h"
+#include "GSPng.h"
+#ifdef __linux__
+#include <sys/stat.h> // mkdir
+#endif
 
 #ifdef _WINDOWS
 
@@ -375,7 +379,8 @@ static IPin* GetFirstPin(IBaseFilter* pBF, PIN_DIRECTION dir)
 //
 
 GSCapture::GSCapture()
-	: m_capturing(false)
+	: m_capturing(false), m_frame(0)
+	  , m_out_dir("/tmp/GSdx_Capture") // FIXME Later add an option
 {
 }
 
@@ -476,6 +481,15 @@ bool GSCapture::BeginCapture(float fps)
 
 	CComQIPtr<IGSSource>(m_src)->DeliverNewSegment();
 
+#elif __linux__
+	mkdir(m_out_dir.c_str(), 0777);
+
+	// Really cheap recording
+	m_frame = 0;
+	// Add option !!!
+	m_size.x = 1280;
+	m_size.y = 1024;
+
 #endif
 
 	m_capturing = true;
@@ -507,6 +521,17 @@ bool GSCapture::DeliverFrame(const void* bits, int pitch, bool rgba)
 		return true;
 	}
 
+#elif __linux__
+
+	try {
+		std::string out_file = m_out_dir + format("/frame.%010d.png", m_frame);
+		GSPng::Save(GSPng::RGB_PNG, out_file, (char*)bits, m_size.x, m_size.y, pitch);
+	} catch (...) {
+		// Don't care. Likely a wrong setup. Bonus for the futur
+	}
+
+	m_frame++;
+
 #endif
 
 	return false;
@@ -536,6 +561,10 @@ bool GSCapture::EndCapture()
 		m_graph = NULL;
 	}
 
+#elif __linux__
+
+	m_frame = 0;
+
 #endif
 
 	m_capturing = false;

plugins/GSdx/GSCapture.h

@@ -39,6 +39,8 @@ class GSCapture
 #endif
 	bool m_capturing;
 	GSVector2i m_size;
+	uint64 m_frame;
+	std::string m_out_dir;
 
 	#ifdef _WINDOWS