initial code for dumping imessages in a reasonable format

2014-02-09 00:30:49 +01:00
parent c0021efb13
commit 9dd7628f04
157 changed files with 24178 additions and 0 deletions
--- a/dump-imessages/iphone-dataprotection/ramdisk_tools/image.c
+++ b/dump-imessages/iphone-dataprotection/ramdisk_tools/image.c
@@ -0,0 +1,72 @@
+#include <stdio.h>
+#include <string.h>
+#include <CoreGraphics/CoreGraphics.h>
+#include <IOKit/IOKitLib.h>
+
+int screenWidth, screenHeight;
+CGContextRef context = NULL;
+
+CGContextRef fb_open() {
+	io_connect_t conn = NULL;
+	int bytesPerRow;
+	void *surfaceBuffer;
+	void *frameBuffer;
+	CGColorSpaceRef colorSpace;
+	
+	if (context != NULL)
+        return context;
+
+	io_service_t fb_service = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("AppleCLCD"));
+	if (!fb_service) {
+		fb_service = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("AppleM2CLCD"));
+		if (!fb_service) {
+			printf("Couldn't find framebuffer.\n");
+			return NULL;
+		}
+	}
+
+	IOMobileFramebufferOpen(fb_service, mach_task_self(), 0, &conn);
+	IOMobileFramebufferGetLayerDefaultSurface(conn, 0, &surfaceBuffer);
+
+	screenHeight = CoreSurfaceBufferGetHeight(surfaceBuffer);
+	screenWidth = CoreSurfaceBufferGetWidth(surfaceBuffer);
+	bytesPerRow = CoreSurfaceBufferGetBytesPerRow(surfaceBuffer);
+
+	CoreSurfaceBufferLock(surfaceBuffer, 3);
+	frameBuffer = CoreSurfaceBufferGetBaseAddress(surfaceBuffer);
+	CoreSurfaceBufferUnlock(surfaceBuffer);
+
+	// create bitmap context
+	colorSpace = CGColorSpaceCreateDeviceRGB();
+	context = CGBitmapContextCreate(frameBuffer, screenWidth, screenHeight, 8, bytesPerRow, colorSpace, kCGImageAlphaPremultipliedLast);
+	if(context == NULL) {
+		printf("Couldn't create screen context!\n");
+		return NULL;
+	}
+
+	CGColorSpaceRelease(colorSpace);
+
+	return context;
+}
+
+int drawImage(const char* pngFileName)
+{
+ 	CGContextRef c = fb_open();
+	if (c == NULL)
+		return -1;
+
+    CFURLRef url = CFURLCreateFromFileSystemRepresentation(kCFAllocatorDefault, pngFileName, strlen(pngFileName), 0);
+    void* imageSource = CGImageSourceCreateWithURL(url, NULL);
+    CFRelease(url);
+    
+    if (imageSource != NULL)
+    {
+        CGImageRef img = CGImageSourceCreateImageAtIndex(imageSource, 0, NULL);
+        if (img != NULL)
+        {
+            CGContextClearRect (c, CGRectMake(0, 0, screenWidth, screenHeight));
+            CGContextDrawImage(c, CGRectMake(0, 0, screenWidth, screenHeight), img);
+        }
+    }
+    return 0;
+}