added libvnc/ with RealVNC compatibility fix

[presencevnc] / libvnc / libvncserver / draw.c

diff --git a/libvnc/libvncserver/draw.c b/libvnc/libvncserver/draw.c
new file mode 100755 (executable)
index 0000000..7e1ed49
--- /dev/null
+++ b/libvnc/libvncserver/draw.c
@@ -0,0 +1,61 @@
+#include <rfb/rfb.h>
+
+void rfbFillRect(rfbScreenInfoPtr s,int x1,int y1,int x2,int y2,rfbPixel col)
+{
+  int rowstride = s->paddedWidthInBytes, bpp = s->bitsPerPixel>>3;
+  int i,j;
+  char* colour=(char*)&col;
+
+   if(!rfbEndianTest)
+    colour += 4-bpp;
+  for(j=y1;j<y2;j++)
+    for(i=x1;i<x2;i++)
+      memcpy(s->frameBuffer+j*rowstride+i*bpp,colour,bpp);
+  rfbMarkRectAsModified(s,x1,y1,x2,y2);
+}
+
+#define SETPIXEL(x,y) \
+  memcpy(s->frameBuffer+(y)*rowstride+(x)*bpp,colour,bpp)
+
+void rfbDrawPixel(rfbScreenInfoPtr s,int x,int y,rfbPixel col)
+{
+  int rowstride = s->paddedWidthInBytes, bpp = s->bitsPerPixel>>3;
+  char* colour=(char*)&col;
+
+  if(!rfbEndianTest)
+    colour += 4-bpp;
+  SETPIXEL(x,y);
+  rfbMarkRectAsModified(s,x,y,x+1,y+1);
+}
+
+void rfbDrawLine(rfbScreenInfoPtr s,int x1,int y1,int x2,int y2,rfbPixel col)
+{
+  int rowstride = s->paddedWidthInBytes, bpp = s->bitsPerPixel>>3;
+  int i;
+  char* colour=(char*)&col;
+
+  if(!rfbEndianTest)
+    colour += 4-bpp;
+
+#define SWAPPOINTS { i=x1; x1=x2; x2=i; i=y1; y1=y2; y2=i; }
+  if(abs(x1-x2)<abs(y1-y2)) {
+    if(y1>y2)
+      SWAPPOINTS
+    for(i=y1;i<=y2;i++)
+      SETPIXEL(x1+(i-y1)*(x2-x1)/(y2-y1),i);
+    /* TODO: Maybe make this more intelligently? */
+    if(x2<x1) { i=x1; x1=x2; x2=i; }
+    rfbMarkRectAsModified(s,x1,y1,x2+1,y2+1);
+  } else {
+    if(x1>x2)
+      SWAPPOINTS
+    else if(x1==x2) {
+      rfbDrawPixel(s,x1,y1,col);
+      return;
+    }
+    for(i=x1;i<=x2;i++)
+      SETPIXEL(i,y1+(i-x1)*(y2-y1)/(x2-x1));
+    if(y2<y1) { i=y1; y1=y2; y2=i; }
+    rfbMarkRectAsModified(s,x1,y1,x2+1,y2+1);
+  }
+}