iOS Is PdfContext coordinates inverse????

AbhishekApple · Dec 17, 2010

I am trying to create pdf but if i draw an image at x=10 & y=10 it draws at the bottom of the pdf....

I am struggling a lot to arrange the images and text below the image in the pdf....

Please help here is my code,,,, its bit long please see the orange part if u hv less time

Code:

-(void)createPdf{
	NSLog(@"Create Pdf");
	NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
	NSString *saveDirectory = [paths objectAtIndex:0];
	NSString *saveFileName = @"myPDF.pdf";
	NSString *newFilePath = [saveDirectory stringByAppendingPathComponent:saveFileName];
	const char *filename = [newFilePath UTF8String];
	
	CGRect pageRect = CGRectMake(0, 0, 612, 700);
	CGContextRef pdfContext;
	CFStringRef path;
	CFURLRef url;
	CFMutableDictionaryRef myDictionary = NULL;
	path = CFStringCreateWithCString (NULL, filename,
									  kCFStringEncodingUTF8);
	url = CFURLCreateWithFileSystemPath (NULL, path,
										 kCFURLPOSIXPathStyle, 0);
	NSLog(@"path= %@",path);
	CFRelease (path);
	myDictionary = CFDictionaryCreateMutable(NULL, 0,
											 &kCFTypeDictionaryKeyCallBacks,
											 &kCFTypeDictionaryValueCallBacks);
	CFDictionarySetValue(myDictionary, kCGPDFContextTitle, CFSTR("My PDF File"));
	CFDictionarySetValue(myDictionary, kCGPDFContextCreator, CFSTR("My Name"));
	pdfContext = CGPDFContextCreateWithURL(url, &pageRect, myDictionary);
	NSLog(@"%@",url);
	CFRelease(myDictionary);
	CFRelease(url);

	CGContextBeginPage (pdfContext, &pageRect);
	const char *sql = "select pageno,rectframe,prod_name,prod_code,prod_imagename,prod_image from tblCatlogDetail where catmaster_id=1";
	//sqlite3_stmt *selectStmt;
	if(sqlite3_prepare_v2(database, sql, -1, &selectStmt, NULL) == SQLITE_OK) {
		
		[COLOR="orange"]while(sqlite3_step(selectStmt) == SQLITE_ROW) {
			NSLog(@"inside select");
			
			NSString *rect = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectStmt, 1)];
			NSArray *arryRect = [rect componentsSeparatedByString:@","];
			float x = [[arryRect objectAtIndex:0] floatValue];
			float y = [[arryRect objectAtIndex:1] floatValue];
			float w = [[arryRect objectAtIndex:2] floatValue];
			float h = [[arryRect objectAtIndex:3] floatValue];
			
			NSString *prd_name = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectStmt, 2)];
			
			NSUInteger blobLength = sqlite3_column_bytes(selectStmt, 5);
			
			NSData *imageData = [[NSData alloc] initWithBytes:sqlite3_column_blob(selectStmt, 5) length:blobLength];
			//const char *picture = "Picture";
			UIImage *img = [UIImage imageWithData:imageData];
			
			CGImageRef image=[img CGImage];
			CGContextDrawImage (pdfContext,CGRectMake( x+55, pageRect.size.height-(y+150), 135, 135) ,image);
			//CGContextDrawImage (pdfContext,CGRectMake( x, y, 135, 135) ,image); 
                          // if i use above commented line it draws in non desired location 
			
			NSLog(@"%@ ==> x=%f y=%f x=%f h=%f",prd_name ,x ,y , w, h);
			//CGImageRelease (image);
			[imageData release];

			CGContextSelectFont (pdfContext, "Helvetica", 16, kCGEncodingMacRoman);
			CGContextSetTextDrawingMode (pdfContext, kCGTextFill);
			CGContextSetRGBFillColor (pdfContext, 0, 0, 0, 1);
			const char *text = [prd_name UTF8String];
			CGContextShowTextAtPoint (pdfContext, x+55,pageRect.size.height-(y+150+135) , text, strlen(text));
		}[/COLOR]
	}
	
	CGContextEndPage (pdfContext);
	CGContextRelease (pdfContext);
	
	NSLog(@"Pdf created");
	
}

Also i get this error if i set font...i searched for this but no luck

Code:

<Error>: CGFont/Freetype: The function `create_subset' is currently unimplemented.
Fri Dec 17 17:34:05 Admins-iMac-3.local PCB[4937] <Error>: invalid Type1 font: unable to stream font.
Fri Dec 17 17:34:05 Admins-iMac-3.local PCB[4937] <Error>: FT_Load_Glyph failed: error 6.

Andreas Grauel · Dec 17, 2010

That's correct the origin is on the bottom left and not the upper left.

AbhishekApple · Dec 18, 2010

I got one solution but it isn't working

Code:

// Flip the context vertically
CGContextTranslateCTM(pdfContext, 0.0, pageRect.size.height);
CGContextScaleCTM(pdfContext, 1.0, -1.0);

Here is how i implemented the above code

Code:

-(void)createPdf{
	NSLog(@"Create Pdf");
	NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
	NSString *saveDirectory = [paths objectAtIndex:0];
	NSString *saveFileName = @"myPDF.pdf";
	NSString *newFilePath = [saveDirectory stringByAppendingPathComponent:saveFileName];
	const char *filename = [newFilePath UTF8String];
	
	CGRect pageRect = CGRectMake(0, 0, 612, 700);
	CGContextRef pdfContext;
	CFStringRef path;
	CFURLRef url;
	CFMutableDictionaryRef myDictionary = NULL;
	path = CFStringCreateWithCString (NULL, filename,
									  kCFStringEncodingUTF8);
	url = CFURLCreateWithFileSystemPath (NULL, path,
										 kCFURLPOSIXPathStyle, 0);
	NSLog(@"path= %@",path);
	CFRelease (path);
	myDictionary = CFDictionaryCreateMutable(NULL, 0,
											 &kCFTypeDictionaryKeyCallBacks,
											 &kCFTypeDictionaryValueCallBacks);
	CFDictionarySetValue(myDictionary, kCGPDFContextTitle, CFSTR("My PDF File"));
	CFDictionarySetValue(myDictionary, kCGPDFContextCreator, CFSTR("My Name"));
[COLOR="DarkOrange"]
pdfContext = CGPDFContextCreateWithURL(url, &pageRect, myDictionary);
	
	CGContextTranslateCTM(pdfContext, 0.0, pageRect.size.height);
	CGContextScaleCTM(pdfContext, 1.0, -1.0);[/COLOR]
	
	NSLog(@"%@",url);
	CFRelease(myDictionary);
	CFRelease(url);

	CGContextBeginPage (pdfContext, &pageRect);
		
	const char *sql = "select pageno,rectframe,prod_name,prod_code,prod_imagename,prod_image from tblCatlogDetail where catmaster_id=1";
	//sqlite3_stmt *selectStmt;
	if(sqlite3_prepare_v2(database, sql, -1, &selectStmt, NULL) == SQLITE_OK) {
		
		while(sqlite3_step(selectStmt) == SQLITE_ROW) {
			NSLog(@"inside select");
			
			NSString *rect = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectStmt, 1)];
			NSArray *arryRect = [rect componentsSeparatedByString:@","];
			float x = [[arryRect objectAtIndex:0] floatValue];
			float y = [[arryRect objectAtIndex:1] floatValue];
			float w = [[arryRect objectAtIndex:2] floatValue];
			float h = [[arryRect objectAtIndex:3] floatValue];

			NSString *prd_name = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectStmt, 2)];
			
			NSUInteger blobLength = sqlite3_column_bytes(selectStmt, 5);
[COLOR="DarkOrange"]

			NSData *imageData = [[NSData alloc] initWithBytes:sqlite3_column_blob(selectStmt, 5) length:blobLength];
	
			UIImage *img = [UIImage imageWithData:imageData];
			
			CGImageRef image=[img CGImage];
			//[img drawInRect:CGRectMake( x, y, 135, 135)];
			
			//CGContextDrawImage (pdfContext,CGRectMake( x+20, pageRect.size.height-(y+150), 135, 135) ,image);
			CGContextDrawImage (pdfContext,CGRectMake( x, y, 135, 135) ,image);
			
			
			NSLog(@"%@ ==> x=%f y=%f x=%f h=%f",prd_name ,x ,y , w, h);

			[imageData release];
	
			CGContextSelectFont (pdfContext, "Helvetica", 16, kCGEncodingMacRoman);
			CGContextSetTextDrawingMode (pdfContext, kCGTextFill);
			CGContextSetRGBFillColor (pdfContext, 0, 0, 0, 1);
			const char *text = [prd_name UTF8String];
			CGContextShowTextAtPoint (pdfContext, x , y+140 , text, strlen(text));
		}[/COLOR]
	}

	CGContextEndPage (pdfContext);
	CGContextRelease (pdfContext);
	
	NSLog(@"Pdf created");
	
}

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iOS Is PdfContext coordinates inverse????

AbhishekApple

macrumors member

Andreas Grauel

macrumors newbie

AbhishekApple

macrumors member

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