Merge pull request #194 from mjbudd77/master

Added video pixel linear filtering capability for SDL video backend option.

src/drivers/Qt/ConsoleVideoConf.cpp

@@ -179,6 +179,10 @@ void ConsoleVideoConfDialog_t::openGL_linearFilterChanged( int value )
       {
          consoleWindow->viewport_GL->setLinearFilterEnable( opt );
       }
+      if ( consoleWindow->viewport_SDL )
+      {
+         consoleWindow->viewport_SDL->setLinearFilterEnable( opt );
+      }
    }
 }
 //----------------------------------------------------

src/drivers/Qt/ConsoleViewerGL.cpp

@@ -40,6 +40,8 @@ ConsoleViewGL_t::ConsoleViewGL_t(QWidget *parent)
 		memset( localBuf, 0, localBufSize );
 	}
 
+   linearFilter = false;
+
    if ( g_config )
    {
       int opt;
@@ -133,9 +135,12 @@ void ConsoleViewGL_t::resizeGL(int w, int h)
 
 void ConsoleViewGL_t::setLinearFilterEnable( bool ena )
 {
-   linearFilter = ena;
+   if ( linearFilter != ena )
+   {
+      linearFilter = ena;
 
-	buildTextures();
+	   buildTextures();
+   }
 }
 
 void ConsoleViewGL_t::transfer2LocalBuffer(void)

src/drivers/Qt/ConsoleViewerSDL.cpp

@@ -7,6 +7,7 @@
 #include <unistd.h>
 
 #include "Qt/nes_shm.h"
+#include "Qt/fceuWrapper.h"
 #include "Qt/ConsoleViewerSDL.h"
 
 extern unsigned int gui_draw_area_width;
@@ -46,6 +47,15 @@ ConsoleViewSDL_t::ConsoleViewSDL_t(QWidget *parent)
 		memset( localBuf, 0, localBufSize );
 	}
 
+   linearFilter = false;
+
+   if ( g_config )
+   {
+      int opt;
+      g_config->getOption("SDL.OpenGLip", &opt );
+
+      linearFilter = (opt) ? true : false;
+   }
 }
 
 ConsoleViewSDL_t::~ConsoleViewSDL_t(void)
@@ -56,6 +66,16 @@ ConsoleViewSDL_t::~ConsoleViewSDL_t(void)
 	}
 }
 
+void ConsoleViewSDL_t::setLinearFilterEnable( bool ena )
+{
+   if ( ena != linearFilter )
+   {
+      linearFilter = ena;
+
+	   reset();
+   }
+}
+
 void ConsoleViewSDL_t::transfer2LocalBuffer(void)
 {
 	memcpy( localBuf, nes_shm->pixbuf, localBufSize );
@@ -65,6 +85,15 @@ int ConsoleViewSDL_t::init(void)
 {
 	WId windowHandle;
 
+   if ( linearFilter )
+   {
+       SDL_SetHint( SDL_HINT_RENDER_SCALE_QUALITY, "1" );
+   }
+   else
+   {
+       SDL_SetHint( SDL_HINT_RENDER_SCALE_QUALITY, "0" );
+   }
+
 	if (SDL_InitSubSystem(SDL_INIT_VIDEO) != 0) 
 	{
 		printf("[SDL] Failed to initialize video subsystem.\n");

src/drivers/Qt/ConsoleViewerSDL.h

@@ -23,6 +23,8 @@ class ConsoleViewSDL_t : public QWidget
 
 		void transfer2LocalBuffer(void);
 
+      void setLinearFilterEnable( bool ena );
+
 	protected:
 
 	//void paintEvent(QPaintEvent *event);
@@ -39,6 +41,7 @@ class ConsoleViewSDL_t : public QWidget
 	 int  sdlRendH;
 
 	 bool vsyncEnabled;
+    bool linearFilter;
 
 	 uint32_t  *localBuf;
 	uint32_t   localBufSize;