iOS tiled rendering work

Possibly quite broken intermediate commit. But anyway, now it is
possible to render the tile diretly to a CGContext. Can be seen in
the MobileLibreOffice app when build in the Debug_tile_tester
configuration. See touch_lo_draw_tile() in viewsh.cxx. Unfortunately
the old plain LibreOffice test app is now broken, though, and
displays nothing at all.

This refactoring and hacking in vcl was done in a quite ugly fashion,
with ifdefs etc. But trust me, I did try, several times, for many
days, to get where I wanted in an elegant and clean fashion. But doing
it cleanly meant not being able to actually build it for days while
trying to figure ut which bits go where and which class should be
split into what base and derived class(es), and it was too much for my
limited brain capacity. I just couldn't juggle all the vcl class
structure in my head, especially as I don't have any good
understanding of the general design of it all.

Change-Id: Ia59d6a9cce15a63e63f94e8d8574bef21993fb1f

1 files changed, 7 insertions, 20 deletions

diff --git a/sw/source/core/view/viewsh.cxx b/sw/source/core/view/viewsh.cxx
index add342d5b819..01933762695b 100644
--- a/sw/source/core/view/viewsh.cxx
+++ b/sw/source/core/view/viewsh.cxx
@@ -67,6 +67,7 @@
 #include "../../ui/inc/view.hxx"
 #include <PostItMgr.hxx>
 #include <vcl/dibtools.hxx>
+#include <vcl/sysdata.hxx>
 #include <vcl/virdev.hxx>
 #include <vcl/svapp.hxx>
 #include <svx/sdrpaintwindow.hxx>
@@ -1756,6 +1757,9 @@ void SwViewShell::PaintTile(VirtualDevice &rDevice, int contextWidth, int contex
     mbTiledRendering = true;
     mpOut = &rDevice;
 
+    // resizes the virtual device so to contain the entrie context
+    rDevice.SetOutputSizePixel(Size(contextWidth, contextHeight));
+
     // setup the output device to draw the tile
     MapMode aMapMode(rDevice.GetMapMode());
     aMapMode.SetMapUnit(MAP_TWIP);
@@ -1769,9 +1773,6 @@ void SwViewShell::PaintTile(VirtualDevice &rDevice, int contextWidth, int contex
     aMapMode.SetScaleY(scaleY);
     rDevice.SetMapMode(aMapMode);
 
-    // resizes the virtual device so to contain the entrie context
-    rDevice.SetOutputSizePixel(Size(contextWidth, contextHeight));
-
     // scroll the requested area into view if necessary
     MakeVisible(SwRect(Point(tilePosX, tilePosY), rDevice.PixelToLogic(Size(contextWidth, contextHeight))));
 
@@ -1813,25 +1814,11 @@ void touch_lo_draw_tile(void *context, int contextWidth, int contextHeight, MLOD
     Application::AcquireSolarMutex(1);
     if (pViewShell)
     {
-        // TODO create a VirtualDevice based on SystemGraphicsData instead so
-        // that we get direct rendering; something like:
-        //
-        VirtualDevice aDevice;
-
+        SystemGraphicsData aData;
+        aData.rCGContext = (CGContextRef) context;
+        VirtualDevice aDevice(&aData, (sal_uInt16)0);
         // paint to it
         pViewShell->PaintTile(aDevice, contextWidth, contextHeight, tilePosX, tilePosY, tileWidth, tileHeight);
-
-        // copy the aDevice content to mpImage
-        Bitmap aBitmap(aDevice.GetBitmap(aDevice.PixelToLogic(Point(0,0)), aDevice.PixelToLogic(Size(contextWidth, contextHeight))));
-        BitmapReadAccess * readAccess = aBitmap.AcquireReadAccess();
-        touch_lo_copy_buffer((void *) readAccess->GetBuffer(),
-                             contextWidth,
-                             contextHeight,
-                             readAccess-> GetScanlineSize(),
-                             context,
-                             contextWidth,
-                             contextHeight);
-        aBitmap.ReleaseAccess(readAccess);
     }
     Application::ReleaseSolarMutex();
 #else