More hacking on the tilebench part of the UnitTest app

On iOS, don't attempt to write the tile dump ppm file to /tmp, but use
the app-specific directory so that it can be copied for inspection
using iTunes. (Of course, even better would be to simply paint it to
the app's view. Later)

Change-Id: I8dd60d04adc61de6594099f5c358a9b6220522da
Reviewed-on: https://gerrit.libreoffice.org/61255Reviewed-by: Tor Lillqvist <tml@collabora.com>
Tested-by: Tor Lillqvist <tml@collabora.com>

ios/UnitTest/UnitTest/Info.plist

@@ -2,6 +2,8 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
+	<key>UIFileSharingEnabled</key>
+	<true/>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
 	<key>CFBundleExecutable</key>

ios/UnitTest/UnitTest/ViewController.mm

@@ -29,9 +29,35 @@ extern "C" {
 }
 
 #include <premac.h>
+#import <CoreGraphics/CoreGraphics.h>
 #import "ViewController.h"
 #include <postmac.h>
 
+// This is from online's Mobile app (as it is called at the moment);
+// should of course be factored out to some common place. Here in
+// core?
+
+static thread_local CGContextRef cgc = nullptr;
+
+static unsigned char *lo_ios_app_get_cgcontext_for_buffer(unsigned char *buffer, int width, int height)
+{
+    assert(cgc == nullptr);
+
+    cgc = CGBitmapContextCreate(buffer, width, height, 8, width*4, CGColorSpaceCreateDeviceRGB(), kCGImageAlphaNoneSkipFirst);
+
+    CGContextTranslateCTM(cgc, 0, height);
+    CGContextScaleCTM(cgc, 1, -1);
+
+    return (unsigned char*)cgc;
+}
+
+static void lo_ios_app_release_cgcontext_for_buffer()
+{
+    assert(cgc != nullptr);
+    CGContextRelease(cgc);
+    cgc = nullptr;
+}
+
 @interface ViewController ()
 
 @end

libreofficekit/qa/tilebench/tilebench.cxx

@@ -64,7 +64,15 @@ static std::vector< TimeRecord > aTimes;
 static void dumpTile(const int nWidth, const int nHeight, const int mode, const unsigned char* pBufferU)
 {
     auto pBuffer = reinterpret_cast<const char *>(pBufferU);
+#ifndef IOS
     std::ofstream ofs("/tmp/dump_tile.ppm");
+#else
+    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
+    NSString *documentsDirectory = [paths objectAtIndex:0];
+    static int counter = 0;
+    NSString *path = [NSString stringWithFormat:@"%@/dump_tile_%d.ppm", documentsDirectory, counter++];
+    std::ofstream ofs([path UTF8String]);
+#endif
     ofs << "P6\n"
         << nWidth << " "
         << nHeight << "\n"
@@ -101,6 +109,7 @@ static void dumpTile(const int nWidth, const int nHeight, const int mode, const
             }
         }
     }
+    ofs.close();
 }
 
 static void testTile( Document *pDocument, int max_parts,
@@ -156,8 +165,15 @@ static void testTile( Document *pDocument, int max_parts,
         {
             // whole part; meaningful only for non-writer documents.
             aTimes.emplace_back("render whole part");
+#ifndef IOS
             pDocument->paintTile(pPixels, nTilePixelWidth, nTilePixelHeight,
                                  nWidth/2, 2000, 1000, 1000); // not square
+#else
+            pDocument->paintTile(lo_ios_app_get_cgcontext_for_buffer(pPixels, nTilePixelWidth, nTilePixelHeight),
+                                 nTilePixelWidth, nTilePixelHeight,
+                                 nWidth/2, 2000, 1000, 1000); // not square
+            lo_ios_app_release_cgcontext_for_buffer();
+#endif
             aTimes.emplace_back();
             if (dump)
                 dumpTile(nTilePixelWidth, nTilePixelHeight, mode, pPixels);
@@ -177,9 +193,15 @@ static void testTile( Document *pDocument, int max_parts,
                         nY = nHeight;
                         break;
                     }
-
+#ifndef IOS
                     pDocument->paintTile(pPixels, nTilePixelWidth, nTilePixelHeight,
                                          nX, nY, nTilePixelWidth, nTilePixelHeight);
+#else
+                    pDocument->paintTile(lo_ios_app_get_cgcontext_for_buffer(pPixels, nTilePixelWidth, nTilePixelHeight),
+                                         nTilePixelWidth, nTilePixelHeight,
+                                         nX, nY, nTilePixelWidth, nTilePixelHeight);
+                    lo_ios_app_release_cgcontext_for_buffer();
+#endif
                     nTiles++;
                     fprintf (stderr, "   rendered 1:1 tile %d at %d, %d\n",
                              nTiles, nX, nY);
@@ -203,9 +225,15 @@ static void testTile( Document *pDocument, int max_parts,
                         nY = nHeight;
                         break;
                     }
-
+#ifndef IOS
                     pDocument->paintTile(pPixels, nTilePixelWidth, nTilePixelHeight,
                                          nX, nY, nTileTwipWidth, nTileTwipHeight);
+#else
+                    pDocument->paintTile(lo_ios_app_get_cgcontext_for_buffer(pPixels, nTilePixelWidth, nTilePixelHeight),
+                                         nTilePixelWidth, nTilePixelHeight,
+                                         nX, nY, nTileTwipWidth, nTileTwipHeight);
+                    lo_ios_app_release_cgcontext_for_buffer();
+#endif
                     nTiles++;
                     fprintf (stderr, "   rendered scaled tile %d at %d, %d\n",
                              nTiles, nX, nY);