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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
<!-- BEGIN META TAG INFO -->
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>CGDrawPicture - /Source/CGDrawPicture.c</title>
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<tr>
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<td align="left" colspan="2">
<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/GraphicsImaging/index.html">Graphics & Imaging</a> > <a href="../../samplecode/GraphicsImaging/idxQuartz-date.html">Quartz</a> > <A HREF="javascript:location.replace('index.html');">CGDrawPicture</A> >
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<div style="width:100%; position:fixed;"><div align="center" id="watermark" style="position: relative; margin-left:auto; margin-right:auto; z-index:20; width:500px;"><div class="legacybox"><h1>Not Recommended Document<span class=closebutton><a href="javascript:closeWatermark()"><img src="../../images/closebutton.png" width="14" height="14" border="0" alt="close button"></a></span></h1>
<p><strong>Important: </strong>The information in this document is <strong>Not Recommended</strong> and should not be used for new development.</p>
<div class="reflibtopic">
<p>Current information on this Reference Library topic can be found here:</p>
<ul>
<li><a href="http://developer.apple.com/referencelibrary/GraphicsImaging/idxQuartz-date.html" target="_blank">Graphics & Imaging > Quartz</a></li>
</ul>
</div>
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<td><h1><div id="pagehead">CGDrawPicture</div></h1></td>
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<h2>/Source/CGDrawPicture.c</h2>
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<option value="listing4.html">/Headers/UIHandling.h</option>
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<p><strong><a href="CGDrawPicture.zip">Download Sample</a></strong> (“CGDrawPicture.zip”, 342.2K)<BR>
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<!--googleon: index -->
<pre class="sourcecodebox">/*
File: CGDrawPicture.c
Contains: Demonstration of drawing QuickDraw Pictures into
CoreGraphics (Quartz) context with Carbon API
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
("Apple") in consideration of your agreement to the following terms, and your
use, installation, modification or redistribution of this Apple software
constitutes acceptance of these terms. If you do not agree with these terms,
please do not use, install, modify or redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and subject
to these terms, Apple grants you a personal, non-exclusive license, under Apple's
copyrights in this original Apple software (the "Apple Software"), to use,
reproduce, modify and redistribute the Apple Software, with or without
modifications, in source and/or binary forms; provided that if you redistribute
the Apple Software in its entirety and without modifications, you must retain
this notice and the following text and disclaimers in all such redistributions of
the Apple Software. Neither the name, trademarks, service marks or logos of
Apple Computer, Inc. may be used to endorse or promote products derived from the
Apple Software without specific prior written permission from Apple. Except as
expressly stated in this notice, no other rights or licenses, express or implied,
are granted by Apple herein, including but not limited to any patent rights that
may be infringed by your derivative works or by other works in which the Apple
Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT
(INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Copyright © 1999-2001 Apple Computer, Inc., All Rights Reserved
*/
#include "CGDrawPicture.h"
#include "UIHandling.h"
#define kExtraMBarSpace 25
#define MIN(x,y) ( ( (x) > (y) ) ? (y) : (x) )
#define kPICTHeaderSize 512
#define ScaleCGRect(cgRect, scaleFactor); {(cgRect).origin.x*=(scaleFactor); \
(cgRect).origin.y*=(scaleFactor); \
(cgRect).size.width*=(scaleFactor); \
(cgRect).size.height*=(scaleFactor);}
#define ScaleQDRect(qdRect, scaleFactor); { (qdRect).top*=(scaleFactor); \
(qdRect).left*=(scaleFactor); \
(qdRect).bottom*=(scaleFactor); \
(qdRect).right*=(scaleFactor); }
/********** our data types ***********/
typedef struct PICTDocData{
Rect theBounds; /* the Bounds of the PICT */
PicHandle theData; /*the PICT Data Handle*/
}PICTDocData;
typedef struct CGDocData{
QDPictRef pictDataRef; /* the picture reference for QDPictDrawToCGContext */
CGRect theCGBounds; /* the bounds for the QDPictRef */
}CGDocData;
typedef enum dataTypeToDraw{
kTypeIsQD = 0,
kTypeIsCG = 1
}dataTypeToDraw;
typedef struct DataToDraw{
dataTypeToDraw type; // The type of data to draw.
PMPageFormat pageFormat; // the page format for this document
PMPrintSettings printSettings; // the print settings for a given print job
union{
PICTDocData pictData; // our PICT data for drawing with QD
CGDocData cgData; // our PICT data for drawing with Quartz
}u;
}DataToDraw, *DataToDrawPtr;
static OSStatus ReadPICTData(const FSSpec *theSpec, Handle *theData);
static OSStatus SetPICTBounds(PICTDocData *thePICTImage);
static OSStatus MakePictDocument(const FSSpec *theSpecP, CGDocData *theCGDataP);
static OSStatus MakeTheWindows(const StrFileName name, const DataToDraw *ourPictDataP, const DataToDraw *ourCGDataP);
static OSStatus DrawPICTData(const void *dataToDrawP, float scaleFactor);
// global data
static Rect b;
UInt32 MyGetDocumentNumPagesInDoc(const void *ourDataP)
{
#pragma unused (ourDataP)
return 1; // we always have 1 page per document
}
PageDrawProc *GetMyDrawPageProc(const void *ourDataP)
{
#pragma unused (ourDataP)
return DrawPICTData;
}
void SetPageFormatOnPrivateData(void *ourDataP, PMPageFormat pageFormat)
{
if(ourDataP)
((DataToDrawPtr)ourDataP)->pageFormat = pageFormat;
return;
}
void SetPrintSettingsOnPrivateData(void *ourDataP, PMPrintSettings printSettings)
{
if(ourDataP)
((DataToDrawPtr)ourDataP)->printSettings = printSettings;
return;
}
PMPageFormat GetPageFormatFromPrivateData(const void *ourDataP)
{
return ourDataP ? ((DataToDrawPtr)ourDataP)->pageFormat : NULL;
}
PMPrintSettings GetPrintSettingsFromPrivateData(const void *ourDataP)
{
return ourDataP ? ((DataToDrawPtr)ourDataP)->printSettings : NULL;
}
OSStatus DisposeWindowPrivateData(void *ourDataP)
{
DataToDrawPtr ourDataToDrawP = (DataToDrawPtr)ourDataP;
if(ourDataToDrawP != NULL){
switch(ourDataToDrawP->type){
case kTypeIsCG:
if(ourDataToDrawP->u.cgData.pictDataRef != NULL){
QDPictRelease(ourDataToDrawP->u.cgData.pictDataRef);
}
break;
case kTypeIsQD:
if(ourDataToDrawP->u.pictData.theData != NULL){
DisposeHandle((Handle)ourDataToDrawP->u.pictData.theData);
}
break;
default:
// assert(...) // shouldn't get here!
break;
}
// release our page format and print settings if they exist
if(ourDataToDrawP->pageFormat)
(void)PMRelease(ourDataToDrawP->pageFormat);
if(ourDataToDrawP->printSettings)
(void)PMRelease(ourDataToDrawP->printSettings);
free(ourDataToDrawP); // free the outer structure
}
return noErr;
}
OSStatus doTheFile(const FSSpec *theSpec)
{
OSStatus err = noErr;
DataToDraw *ourPictDataP = (DataToDraw *)calloc(sizeof(DataToDraw), 1);
if(ourPictDataP){
ourPictDataP->type = kTypeIsQD;
err = ReadPICTData(theSpec, (Handle *)&(ourPictDataP->u.pictData.theData) );
if(!err)err = SetPICTBounds(&ourPictDataP->u.pictData);
if(!err){
DataToDraw *ourCGDataP = (DataToDraw *)calloc(sizeof(DataToDraw), 1);
if(ourCGDataP){
ourCGDataP->type = kTypeIsCG;
err = MakePictDocument(theSpec, &(ourCGDataP->u.cgData) );
if(!err)
err = MakeTheWindows(theSpec->name, ourPictDataP, ourCGDataP);
if(err)
(void)DisposeWindowPrivateData(&ourCGDataP);
}else
err = memFullErr;
}
if(err)
(void)DisposeWindowPrivateData(&ourPictDataP);
}else
err = memFullErr;
return err;
}
static OSStatus SetPICTBounds(PICTDocData *thePICTImage)
{
Rect *theBounds = &(*thePICTImage).theBounds;
*theBounds = (*(*thePICTImage).theData)->picFrame;
OffsetRect(theBounds, -theBounds->left, -theBounds->left);
return noErr;
}
static OSStatus MakeTheWindows(const StrFileName name, const DataToDraw *ourPictDataP, const DataToDraw *ourCGDataP)
{
OSStatus err = noErr;
SInt16 windowTop = GetMBarHeight() + kExtraMBarSpace;
SInt16 right,bottom;
Rect bounds;
if (err == noErr) {
right = MIN(ourPictDataP->u.pictData.theBounds.right , gMainScreenRect.right );
bottom = MIN(ourPictDataP->u.pictData.theBounds.bottom, gMainScreenRect.bottom - windowTop );
SetRect(&bounds, 0 , 0, right, bottom);
}
if (err == noErr){
WindowRef qdWindow;
WindowRef cgWindow;
qdWindow = MakeWindow(ourPictDataP); // this will be our QD Window
if(qdWindow){
SetWTitle(qdWindow, name);
SizeWindow (qdWindow, bounds.right - bounds.left,
bounds.bottom-bounds.top, true);
SetPortWindowPort(qdWindow);
ClipRect(&bounds);
GetWindowPortBounds(qdWindow, &b);
InvalWindowRect(qdWindow, &b);
ShowWindow(qdWindow);
}else
err = kCantCreateWindow;
if(!err){
cgWindow = MakeWindow(ourCGDataP); // this will be our CG Window
if(cgWindow){
Rect cgBounds;
CFStringRef tempString;
CFMutableStringRef tempString2;
cgBounds.top = 0;
cgBounds.left = 0;
cgBounds.right = CGRectGetWidth(ourCGDataP->u.cgData.theCGBounds);
cgBounds.bottom = CGRectGetHeight(ourCGDataP->u.cgData.theCGBounds);
CopyWindowTitleAsCFString(qdWindow, &tempString);
tempString2 = CFStringCreateMutableCopy(kCFAllocatorDefault,
0, tempString);
CFStringAppend(tempString2, CFSTR(" with Quartz"));
SetWindowTitleWithCFString(cgWindow, tempString2);
CFRelease(tempString);
CFRelease(tempString2);
SizeWindow (cgWindow, cgBounds.right - cgBounds.left,
cgBounds.bottom-cgBounds.top, true);
SetPortWindowPort(cgWindow);
GetWindowPortBounds(cgWindow, &b);
RectRgn(gScratchRgn, &b);
SetPortClipRegion(GetWindowPort(cgWindow), gScratchRgn);
InvalWindowRect(cgWindow, &b);
ShowWindow(cgWindow);
}else
err = kCantCreateWindow;
}
}
return err;
}
static OSStatus MakePictDocument(const FSSpec *theSpecP, CGDocData *theCGDataP)
{
OSStatus err = noErr;
FSRef fsRef;
CFURLRef url = NULL;
err = FSpMakeFSRef(theSpecP, &fsRef);
if(!err){
url = CFURLCreateFromFSRef(NULL, &fsRef);
if(url){
theCGDataP->pictDataRef = QDPictCreateWithURL(url);
if(theCGDataP->pictDataRef){
theCGDataP->theCGBounds = QDPictGetBounds(theCGDataP->pictDataRef);
// we'll anchor our bounding rect to a 0,0 origin for our drawing
// purposes
theCGDataP->theCGBounds.origin.x = theCGDataP->theCGBounds.origin.y = 0;
}else
err = kNoQDPictErr;
CFRelease(url);
}else
err = memFullErr;
}
return err;
}
// Read the PICT data from the file into a Handle
static OSStatus ReadPICTData(const FSSpec *theSpec, Handle *theData)
{
short refNum;
OSStatus err;
long size;
Handle ourDataH = NULL;
err = FSpOpenDF(theSpec, fsRdPerm, &refNum);
if (err == noErr) {
// position the file at the start
err = SetFPos(refNum, fsFromStart, 0);
// determine the total size of the file
if(err == noErr)
err = GetEOF(refNum, &size);
if (err == noErr) {
// skip PICT header
size -= kPICTHeaderSize;
err = SetFPos(refNum, fsFromStart, kPICTHeaderSize);
}
if (err == noErr) {
ourDataH = NewHandle(size);
if(ourDataH){
HLock(ourDataH);
err = FSRead(refNum, &size, *ourDataH);
if(err){
DisposeHandle(ourDataH);
ourDataH = NULL;
}
HUnlock(ourDataH);
} else
err = MemError();
}
FSClose(refNum);
}
*theData = ourDataH;
return err;
}
Boolean CanSaveAsPDF(const void *ourDataP)
{
Boolean canSaveAsPDF = false;
DataToDrawPtr ourDataToDrawP = (DataToDrawPtr)ourDataP;
if(ourDataToDrawP && ourDataToDrawP->type == kTypeIsCG){
canSaveAsPDF = true;
}
return canSaveAsPDF;
}
OSStatus DrawPICTData(const void *dataP, float scaleFactor)
{
OSStatus err = noErr;
DataToDrawPtr ourDataToDrawP = (DataToDrawPtr)dataP;
Boolean rotate = false;
Boolean framePict = false;
switch(ourDataToDrawP->type){
case kTypeIsCG:
if(!err){
CGrafPtr ourPort;
CGContextRef ctx;
GetPort(&ourPort);
/*
Use of QDBeginCGContext/QDEndCGContext is preferred to the use of
CreateCGContextForPort since the use of QDBeginCGContext/QDEndCGContext
is supported at during printing whereas the use of CreateCGContextForPort is
only supported for drawing during non-printing situations.
QDBeginCGContext/QDEndCGContext are only available on MacOS X v10.1 and later. QDBeginCGContext
returns a CGContextRef corresponding to the port passed in. The graphics state is initialized
to default values. The initial coordinate system of the context is at the lower left
corner of the port passed in.
Calling QDBeginCGContext on a port has the side effect of replacing the port
bottlenecks with bottlenecks that do no imaging. Use of QuickDraw in the port
when you can also draw to this context would fail during printing and so the
behavior is implemented as described here. In a future version of MacOS X,
QuickDraw drawing to a grafPort in this state will generate messages
to the console.
Calling QDEndCGContext gives up the CGContextRef and restores the QuickDraw
bottlenecks on the port to their previous state.
CGContextRelease should *NEVER* be called on a context obtained with
QDBeginCGContext. Once an application calls QDEndCGContext on
a context obtained with QDBeginCGContext, the application no longer
has a valid reference to that context and should not draw to it. In order
to again draw to a CGContextRef corresponding to a given port, again call
QDBeginCGContext.
*/
err = QDBeginCGContext(ourPort, &ctx);
// default coordinate system, QD bottlenecks disabled. No QD drawing allowed
if(!err){
Rect portRect;
OSStatus tempErr;
CGRect drawRect = ourDataToDrawP->u.cgData.theCGBounds;
GetPortBounds(ourPort, &portRect);
/* since we're doing app scaling, we need to scale up our drawing rect
to an appropriate size to account for the scaling. This would normally
apply to all our data we draw with app scaling.
See the CGDrawPicture ReadME file for more information on pattern scaling and the
issue we are addressing here.
*/
if(scaleFactor != 1.)
ScaleCGRect(drawRect, scaleFactor);
// draw our PICT so that top of PICT is at the port origin. To do this
// we offset our rect so that the Y value is at (portHeight - drawRectHeight)
drawRect = CGRectOffset(drawRect,
0,
(portRect.bottom - portRect.top) - drawRect.size.height);
// in case we want to rotate about the center of the PICT
if(rotate){
CGPoint p;
p.x = drawRect.origin.x + drawRect.size.width/2;
p.y = drawRect.origin.y + drawRect.size.height/2;
CGContextTranslateCTM(ctx, p.x, p.y);
CGContextRotateCTM(ctx, -45);
CGContextTranslateCTM(ctx, -p.x, -p.y);
}
// in case we want a frame around the PICT
if(framePict)
CGContextStrokeRectWithWidth(ctx, drawRect, 1.);
CGContextSaveGState(ctx);
/* in order for our app scaling to not scale QD patterns in our
picture at print time we need to factor out app scaling from CTM
prior to drawing our picture. Pattern scaling is broken
in MacOS 10.1.0 but will be fixed soon.
*/
CGContextScaleCTM(ctx, scaleFactor, scaleFactor);
/* Now we need to transform the rect we would otherwise draw
with so that we account for the fact that we've factored
out the application scaling from the CTM
*/
if(scaleFactor != 1.)
ScaleCGRect(drawRect, 1/scaleFactor);
/* now when we draw our picture, our patterns are scaled to the
CTM at the time we draw the picture. The scaling of the PICT
needed to fit the PICT in the supplied drawRect is not applied
to the patterns. If we DO want the patterns to scale, we should
apply that scale to the CTM prior to drawing our PICT
*/
err = QDPictDrawToCGContext(ctx, drawRect, ourDataToDrawP->u.cgData.pictDataRef);
// restore our gstate to what it was prior to our scaling
CGContextRestoreGState(ctx);
/* if we called QDBeginCGContext and it returned noErr then we MUST call
QDEndCGContext or else we'll never get any QuickDraw imaging again to our
port. Note that future calls to QDBeginCGContext do not recall any
changes we've made to our CGContextRef and instead we get default coordinates
and gstate values.
*/
tempErr = QDEndCGContext(ourPort, &ctx);
if(!err)
err = tempErr;
}else
err = kCantMakeContextErr;
}
break;
case kTypeIsQD:
if(!err){
Rect pictureRect;
GetClip(gScratchRgn);
pictureRect = ourDataToDrawP->u.pictData.theBounds;
/* since we're doing app scaling, we need to scale up our drawing rect
to an appropriate size to account for the scaling. This would normally
apply to all our data we draw with app scaling.
See the CGDrawPicture ReadME file for more information on pattern scaling and the
issue we are addressing here.
*/
if(scaleFactor != 1.)
ScaleQDRect(pictureRect, scaleFactor);
ClipRect(&pictureRect);
DrawPicture(ourDataToDrawP->u.pictData.theData, &pictureRect);
SetClip(gScratchRgn);
}
break;
default:
// assert(...) // shouldn't get here
break;
}
return err;
}
/*
A routine to make a PDF document correponding to arbitrary drawing
Quartz drawing.
*/
OSStatus MakePDFDocument(const FSSpec *fileSpecP, const void *ourDataRef)
{
OSStatus err = noErr;
DataToDrawPtr ourDataToDrawP = (DataToDrawPtr)ourDataRef;
FSRef fsRef;
CFURLRef url = NULL;
CFMutableDictionaryRef dict = CFDictionaryCreateMutable(kCFAllocatorDefault, 0,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
/*
Add some producer information to our PDF file.
*/
if(dict){
CFStringRef stringRef = CFStringCreateWithPascalString(kCFAllocatorDefault,
fileSpecP->name,
kCFStringEncodingUTF8);
CFDictionaryAddValue(dict, CFSTR("Title"), stringRef);
CFRelease(stringRef);
CFDictionaryAddValue(dict, CFSTR("Producer"), CFSTR("Sample CGDrawPicture Application"));
}else
err = memFullErr;
if(!err){
err = FSpMakeFSRef(fileSpecP, &fsRef); // make an FSRef
}
if(!err){
url = CFURLCreateFromFSRef(NULL, &fsRef);
err = FSpDelete(fileSpecP); // delete the file we just made for making the FSRef
if(!err && url){
CGContextRef ctx = CGPDFContextCreateWithURL(url, &ourDataToDrawP->u.cgData.theCGBounds, dict);
if(ctx){
CGContextBeginPage(ctx, &ourDataToDrawP->u.cgData.theCGBounds);
err = QDPictDrawToCGContext(ctx, ourDataToDrawP->u.cgData.theCGBounds,
ourDataToDrawP->u.cgData.pictDataRef);
CGContextEndPage(ctx);
CGContextRelease(ctx);
}else
err = kCantMakeContextErr;
CFRelease(url);
}else{
if(!err)
err = kCantMakeURLErr;
}
}
if(dict)CFRelease(dict);
return err;
}
</pre>
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