fbaccel: auto-blit, obsoleting the explicit blit() calls

probably needs refining on some platforms

src/driver/fbaccel.cpp

@@ -57,6 +57,13 @@ extern GLFramebuffer *glfb;
 #endif
 
 #include <driver/abstime.h>
+#include <system/set_threadname.h>
+
+#if HAVE_COOL_HARDWARE || HAVE_TRIPLEDRAGON
+#define NEED_BLIT_THREAD 0
+#else
+#define NEED_BLIT_THREAD 1
+#endif
 
 //#undef USE_NEVIS_GXA //FIXME
 /*******************************************************************************/
@@ -185,6 +192,7 @@ void CFbAccel::waitForIdle(void)
 
 CFbAccel::CFbAccel(CFrameBuffer *_fb)
 {
+	blit_thread = false;
 	fb = _fb;
 	lastcol = 0xffffffff;
 	lbb = fb->lfb;	/* the memory area to draw to... */
@@ -245,9 +253,6 @@ CFbAccel::CFbAccel(CFrameBuffer *_fb)
 		return;
 	}
 #endif
-#if HAVE_SPARK_HARDWARE || HAVE_AZBOX_HARDWARE
-	OpenThreads::Thread::start();
-#endif
 
 #ifdef USE_NEVIS_GXA
 	/* Open /dev/mem for HW-register access */
@@ -269,18 +274,21 @@ CFbAccel::CFbAccel(CFrameBuffer *_fb)
 	/* TODO: what to do here? does this really happen? */
 	;
 #endif /* USE_NEVIS_GXA */
+
+#if NEED_BLIT_THREAD
+	/* start the autoblit-thread (run() function) */
+	OpenThreads::Thread::start();
+#endif
 };
 
 CFbAccel::~CFbAccel()
 {
-#if HAVE_SPARK_HARDWARE || HAVE_AZBOX_HARDWARE
 	if (blit_thread)
 	{
 		blit_thread = false;
 		blit(); /* wakes up the thread */
 		OpenThreads::Thread::join();
 	}
-#endif
 #if HAVE_SPARK_HARDWARE
 	if (backbuffer)
 	{
@@ -434,6 +442,7 @@ void CFbAccel::paintRect(const int x, const int y, const int dx, const int dy, c
 		line++;
 	}
 #endif
+	blit();
 }
 
 void CFbAccel::paintPixel(const int x, const int y, const fb_pixel_t col)
@@ -557,6 +566,7 @@ void CFbAccel::paintLine(int xa, int ya, int xb, int yb, const fb_pixel_t col)
 			paintPixel(x, y, col);
 		}
 	}
+	blit();
 #endif
 }
 
@@ -663,6 +673,7 @@ void CFbAccel::blit2FB(void *fbbuff, uint32_t width, uint32_t height, uint32_t x
 		}
 		d += fb->stride;
 	}
+	blit();
 #if 0
 	for(int i = 0; i < yc; i++){
 		memmove(clfb + (i + yoff)*stride + xoff*4, ip + (i + yp)*width + xp, xc*4);
@@ -731,22 +742,28 @@ void CFbAccel::run()
 {
 	printf("CFbAccel::run start\n");
 	time_t last_blit = 0;
+	bool finished = false; /* one last blit after everything is done */
 	blit_pending = false;
 	blit_thread = true;
 	blit_mutex.lock();
+	set_threadname("fb::autoblit");
 	while (blit_thread) {
-		if (blit_pending)
+		// printf("blit_pending: %d finish: %d\n", blit_pending, finish);
-			blit_cond.wait(&blit_mutex, BLIT_INTERVAL+1);
+		if (blit_pending || finished)
+			blit_cond.wait(&blit_mutex, BLIT_INTERVAL);
 		else
 			blit_cond.wait(&blit_mutex);
 		time_t now = time_monotonic_ms();
 		if (now - last_blit < BLIT_INTERVAL)
 		{
 			blit_pending = true;
+			finished = false;
 			//printf("CFbAccel::run: skipped, time %ld\n", now - last_blit);
 		}
 		else
 		{
+			/* we timed out => add one more blit, just to make sure */
+			finished = !finished;
 			blit_pending = false;
 			blit_mutex.unlock();
 			_blit();

src/driver/framebuffer_ng.cpp

@@ -786,7 +786,7 @@ bool CFrameBuffer::paintIcon8(const std::string & filename, const int x, const i
 		d += stride;
 	}
 	close(lfd);
-	blit();
+	accel->blit();
 	return true;
 }
 
@@ -1081,12 +1081,12 @@ void CFrameBuffer::paintBackground()
 		for (int i = 0; i < 576; i++)
 			memmove(((uint8_t *)getFrameBufferPointer()) + i * stride, (background + i * BACKGROUNDIMAGEWIDTH), BACKGROUNDIMAGEWIDTH * sizeof(fb_pixel_t));
 		checkFbArea(0, 0, xRes, yRes, false);
+		accel->blit();
 	}
 	else
 	{
 		paintBoxRel(0, 0, xRes, yRes, backgroundColor);
 	}
-	blit();
 }
 
 void CFrameBuffer::SaveScreen(int x, int y, int dx, int dy, fb_pixel_t * const memp)
@@ -1131,7 +1131,7 @@ void CFrameBuffer::RestoreScreen(int x, int y, int dx, int dy, fb_pixel_t * cons
 		fbpos += stride;
 		bkpos += dx;
 	}
-	blit();
+	accel->blit();
 	checkFbArea(x, y, dx, dy, false);
 }
 
@@ -1253,7 +1253,6 @@ void CFrameBuffer::paintMuteIcon(bool paint, int ax, int ay, int dx, int dy, boo
 	}
 	else
 		paintBackgroundBoxRel(ax, ay, dx, dy);
-	blit();
 }
 
 void CFrameBuffer::setFbArea(int element, int _x, int _y, int _dx, int _dy)

src/driver/framebuffer_ng.h

@@ -270,7 +270,7 @@ class CFrameBuffer
 		bool blitToPrimary(unsigned int * data, int dx, int dy, int sw, int sh);
 
 		void mark(int x, int y, int dx, int dy) { accel->mark(x, y, dx, dy); };
-		void blit() { accel->blit(); };
+		void blit() {};
 		void paintMuteIcon(bool paint, int ax, int ay, int dx, int dy, bool paintFrame=true);
 
 		enum