add rotate and flip example

ChangeLog

@@ -1,3 +1,7 @@
+2006-04-27  Johannes E. Schindelin  <Johannes.Schindelin@gmx.de>
+	* examples/{rotate.c, rotatetemplate.c}: add modified pnmshow
+	  which demonstrates fast rotating and flipping.
+
 2006-04-26  Karl Runge <runge@karlrunge.com>
 	* all Makefile.am: use -I $(top_srcdir) instead of -I .. so VPATH
 	  builds will work.

examples/.cvsignore

@@ -14,4 +14,5 @@ colourmaptest
 regiontest
 mac
 filetransfer
-
+backchannel
+rotate

examples/Makefile.am

@@ -18,5 +18,5 @@ noinst_HEADERS=radon.h
 
 noinst_PROGRAMS=example pnmshow regiontest pnmshow24 fontsel \
 	vncev storepasswd colourmaptest simple simple15 $(MAC) \
-	$(FILETRANSFER) backchannel $(BLOOPTEST) camera
+	$(FILETRANSFER) backchannel $(BLOOPTEST) camera rotate
 

examples/pnmshow.c

@@ -2,11 +2,13 @@
 #include <rfb/rfb.h>
 #include <rfb/keysym.h>
 
+#ifndef HAVE_HANDLEKEY
 static void HandleKey(rfbBool down,rfbKeySym key,rfbClientPtr cl)
 {
   if(down && (key==XK_Escape || key=='q' || key=='Q'))
     rfbCloseClient(cl);
 }
+#endif
 
 int main(int argc,char** argv)
 {

examples/rotate.c

@@ -0,0 +1,92 @@
+#include <stdio.h>
+#include <rfb/rfb.h>
+#include <rfb/keysym.h>
+
+static int gcd(int x, int y)
+{
+	if (x == 0)
+		return y;
+	return gcd((y % x), x);
+}
+
+#define CONCAT2(a,b) a##b
+#define CONCAT2E(a,b) CONCAT2(a,b)
+#define CONCAT3(a,b,c) a##b##c
+#define CONCAT3E(a,b,c) CONCAT3(a,b,c)
+
+#define FUNCNAME rfbRotate
+#define FUNC(i, j) (h - 1 - j + i * h)
+#define SWAPDIMENSIONS
+#define OUT 8
+#include "rotatetemplate.c"
+#define OUT 16
+#include "rotatetemplate.c"
+#define OUT 32
+#include "rotatetemplate.c"
+#undef FUNCNAME
+#undef FUNC
+
+#define FUNCNAME rfbRotateCounterClockwise
+#define FUNC(i, j) (j + (w - 1 - i) * h)
+#define OUT 8
+#include "rotatetemplate.c"
+#define OUT 16
+#include "rotatetemplate.c"
+#define OUT 32
+#include "rotatetemplate.c"
+#undef FUNCNAME
+#undef FUNC
+#undef SWAPDIMENSIONS
+
+#define FUNCNAME rfbFlipHorizontally
+#define FUNC(i, j) ((w - 1 - i) + j * w)
+#define OUT 8
+#include "rotatetemplate.c"
+#define OUT 16
+#include "rotatetemplate.c"
+#define OUT 32
+#include "rotatetemplate.c"
+#undef FUNCNAME
+#undef FUNC
+
+#define FUNCNAME rfbFlipVertically
+#define FUNC(i, j) (i + (h - 1 - j) * w)
+#define OUT 8
+#include "rotatetemplate.c"
+#define OUT 16
+#include "rotatetemplate.c"
+#define OUT 32
+#include "rotatetemplate.c"
+#undef FUNCNAME
+#undef FUNC
+
+#define FUNCNAME rfbRotateHundredAndEighty
+#define FUNC(i, j) ((w - 1 - i) + (h - 1 - j) * w)
+#define OUT 8
+#include "rotatetemplate.c"
+#define OUT 16
+#include "rotatetemplate.c"
+#define OUT 32
+#include "rotatetemplate.c"
+#undef FUNCNAME
+#undef FUNC
+
+static void HandleKey(rfbBool down,rfbKeySym key,rfbClientPtr cl)
+{
+	if(down) {
+		if (key==XK_Escape || key=='q' || key=='Q')
+			rfbCloseClient(cl);
+		else if (key == 'r')
+			rfbRotate(cl->screen);
+		else if (key == 'R')
+			rfbRotateCounterClockwise(cl->screen);
+		else if (key == 'f')
+			rfbFlipHorizontally(cl->screen);
+		else if (key == 'F')
+			rfbFlipVertically(cl->screen);
+	}
+}
+
+#define HAVE_HANDLEKEY
+#include "pnmshow.c"
+

examples/rotatetemplate.c

@@ -0,0 +1,52 @@
+#define OUT_T CONCAT3E(uint,OUT,_t)
+#define FUNCTION CONCAT2E(FUNCNAME,OUT)
+
+static void FUNCTION(rfbScreenInfoPtr screen)
+{
+	OUT_T* buffer = (OUT_T*)screen->frameBuffer;
+	int i, j, w = screen->width, h = screen->height;
+	OUT_T* newBuffer = (OUT_T*)malloc(w * h * sizeof(OUT_T));
+
+	for (j = 0; j < h; j++)
+		for (i = 0; i < w; i++)
+			newBuffer[FUNC(i, j)] = buffer[i + j * w];
+
+	memcpy(buffer, newBuffer, w * h * sizeof(OUT_T));
+	free(newBuffer);
+
+#ifdef SWAPDIMENSIONS
+	screen->width = h;
+	screen->paddedWidthInBytes = h * OUT / 8;
+	screen->height = w;
+
+	{
+		rfbClientIteratorPtr iterator;
+		rfbClientPtr cl;
+		iterator = rfbGetClientIterator(screen);
+		while ((cl = rfbClientIteratorNext(iterator)) != NULL)
+			cl->newFBSizePending = 1;
+	}
+#endif
+
+	rfbMarkRectAsModified(screen, 0, 0, screen->width, screen->height);
+}
+
+#if OUT == 32
+void FUNCNAME(rfbScreenInfoPtr screen) {
+	if (screen->serverFormat.bitsPerPixel == 32)
+		CONCAT2E(FUNCNAME,32)(screen);
+	else if (screen->serverFormat.bitsPerPixel == 16)
+		CONCAT2E(FUNCNAME,16)(screen);
+	else if (screen->serverFormat.bitsPerPixel == 8)
+		CONCAT2E(FUNCNAME,8)(screen);
+	else {
+		rfbErr("Unsupported pixel depth: %d\n",
+			screen->serverFormat.bitsPerPixel);
+		return;
+	}
+}
+#endif
+
+#undef FUNCTION
+#undef OUT
+