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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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<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/QuickTime/index.html">QuickTime</a> > <a href="../../samplecode/QuickTime/idxImportExport-date.html">Import & Export</a> > <A HREF="javascript:location.replace('index.html');">Graphic Import-Export</A> >
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<table width="680" border="0" cellpadding="0" cellspacing="0">
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<td><h1><div id="pagehead">Graphic Import-Export</div></h1></td>
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<h2>/Completed Lab/ScaleAndRotate.c</h2>
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<p><strong>View Source Code:</strong>
<select name="gotop" onChange="JumpToNewPage();" style="width:340px"><option selected value="ingnore">Select File</option>
<option value="listing1.html">/Clippings/AlphaComposite.c/CenterForground.txt</option>
<option value="listing2.html">/Clippings/AlphaComposite.c/DrawBackground.txt</option>
<option value="listing3.html">/Clippings/AlphaComposite.c/Rotate.txt</option>
<option value="listing4.html">/Clippings/AlphaComposite.c/SetGraphicsMode.txt</option>
<option value="listing5.html">/Clippings/AlphaComposite.c/SetGraphicsModeAlpha.txt</option>
<option value="listing6.html">/Clippings/DrawImage.c/CloseComponent.txt</option>
<option value="listing7.html">/Clippings/DrawImage.c/GetGraphicsImporterForFile.txt</option>
<option value="listing8.html">/Clippings/DrawImage.c/GetNaturalBounds.txt</option>
<option value="listing9.html">/Clippings/DrawImage.c/GraphicsImportDraw.txt</option>
<option value="listing10.html">/Clippings/DrawImage.c/GraphicsImportSetGWorld.txt</option>
<option value="listing11.html">/Clippings/FilterExport.c/DoExport.txt</option>
<option value="listing12.html">/Clippings/FilterExport.c/OpenADefaultComponent.txt</option>
<option value="listing13.html">/Clippings/FilterExport.c/QTCopyAtomDataToPtr.txt</option>
<option value="listing14.html">/Clippings/FilterExport.c/QTFindChildByIndex.txt</option>
<option value="listing15.html">/Clippings/FilterExport.c/QTGetEffectsList.txt</option>
<option value="listing16.html">/Clippings/FilterExport.c/QTInsertChild.txt</option>
<option value="listing17.html">/Clippings/FilterExport.c/QTNewAtomContainer.txt</option>
<option value="listing18.html">/Clippings/FilterExport.c/SetDepth.txt</option>
<option value="listing19.html">/Clippings/FilterExport.c/SetOutputFile.txt</option>
<option value="listing20.html">/Clippings/FilterExport.c/StandardParameterDialog.txt</option>
<option value="listing21.html">/Clippings/FilterExport.c/Step1.txt</option>
<option value="listing22.html">/Clippings/FilterExport.c/Step8.txt</option>
<option value="listing23.html">/Clippings/GettingMoreInfo.c/DoesDrawAllPixels.txt</option>
<option value="listing24.html">/Clippings/GettingMoreInfo.c/GetCTable.txt</option>
<option value="listing25.html">/Clippings/GettingMoreInfo.c/GetImageDescription.txt</option>
<option value="listing26.html">/Clippings/GettingMoreInfo.c/GetMetaData.txt</option>
<option value="listing27.html">/Clippings/GettingMoreInfo.c/GetNextUserDataType.txt</option>
<option value="listing28.html">/Clippings/GettingMoreInfo.c/NewUserData.txt</option>
<option value="listing29.html">/Clippings/GettingMoreInfo.c/Step6.txt</option>
<option value="listing30.html">/Clippings/GettingMoreInfo.c/Variables.txt</option>
<option value="listing31.html">/Clippings/ImagesFromURL.c/ImporterForDataRef.txt</option>
<option value="listing32.html">/Clippings/MovieToImages.c/ConvertMovieToFile.txt</option>
<option value="listing33.html">/Clippings/MovieToImages.c/CreateMovieFile.txt</option>
<option value="listing34.html">/Clippings/MovieToImages.c/MovieExportDoUserDialog.txt</option>
<option value="listing35.html">/Clippings/MovieToImages.c/MovieImportDoUserDialog.txt</option>
<option value="listing36.html">/Clippings/MovieToImages.c/MovieImportFile.txt</option>
<option value="listing37.html">/Clippings/MovieToImages.c/OpenADefaultComponent1.txt</option>
<option value="listing38.html">/Clippings/MovieToImages.c/OpenADefaultComponent2.txt</option>
<option value="listing39.html">/Clippings/MovieToImages.c/Step8.txt</option>
<option value="listing40.html">/Clippings/MultipleImages.clp/GetImageCount.txt</option>
<option value="listing41.html">/Clippings/MultipleImages.clp/SetGraphicsMode.txt</option>
<option value="listing42.html">/Clippings/MultipleImages.clp/SetImageIndex.txt</option>
<option value="listing43.html">/Clippings/MultipleImages.clp/SetMatrix.txt</option>
<option value="listing44.html">/Clippings/ScaleAndRotate.c/Rotate.txt</option>
<option value="listing45.html">/Clippings/ScaleAndRotate.c/SetBoundsRect.txt</option>
<option value="listing46.html">/Clippings/ScaleAndRotate.c/Step1.txt</option>
<option value="listing47.html">/Clippings/ScaleAndRotate.c/Step3.txt</option>
<option value="listing48.html">/Clippings/ScaleAndRotate.c/Step5.txt</option>
<option value="listing49.html">/Completed Lab/AlphaCompositing.c</option>
<option value="listing50.html">/Completed Lab/DrawImage.c</option>
<option value="listing51.html">/Completed Lab/FilterExport.c</option>
<option value="listing52.html">/Completed Lab/GettingMoreInfo.c</option>
<option value="listing53.html">/Completed Lab/ImagesFromURL.c</option>
<option value="listing54.html">/Completed Lab/MovieToImages.c</option>
<option value="listing55.html">/Completed Lab/MultipleImages.c</option>
<option value="listing56.html">/Completed Lab/ScaleAndRotate.c</option>
<option value="listing57.html">/MacShell/all.h</option>
<option value="listing58.html">/MacShell/ImagesFromURL.r</option>
<option value="listing59.html">/MacShell/MacShell.c</option>
<option value="listing60.html">/MacShell/MacShell.h</option>
<option value="listing61.html">/MacShell/MacShell.r</option>
<option value="listing62.html">/MacShell/NavFile.c</option>
<option value="listing63.html">/MacShell/plist:carb.r</option>
<option value="listing64.html">/MacShell/sample1.h</option>
<option value="listing65.html">/MacShell/sample2.h</option>
<option value="listing66.html">/MacShell/sample3.h</option>
<option value="listing67.html">/MacShell/sample4.h</option>
<option value="listing68.html">/MacShell/sample5.h</option>
<option value="listing69.html">/MacShell/sample6.h</option>
<option value="listing70.html">/MacShell/sample7.h</option>
<option value="listing71.html">/MacShell/sample8.h</option>
<option value="listing72.html">/Start Code/AlphaCompositing.c</option>
<option value="listing73.html">/Start Code/DrawImage.c</option>
<option value="listing74.html">/Start Code/FilterExport.c</option>
<option value="listing75.html">/Start Code/GettingMoreInfo.c</option>
<option value="listing76.html">/Start Code/ImagesFromURL.c</option>
<option value="listing77.html">/Start Code/MovieToImages.c</option>
<option value="listing78.html">/Start Code/MultipleImages.c</option>
<option value="listing79.html">/Start Code/ScaleAndRotate.c</option></select>
</p>
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<p><strong><a href="Graphic_Import-Export.zip">Download Sample</a></strong> (“Graphic_Import-Export.zip”, 3.63M)<BR>
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<pre class="sourcecodebox">// Graphics Importer and Exporter Samples// This example uses graphics importers to draw an image// then demonstrates how to perform scaling, rotation and perspective// manipulation using matrix operations// Originally written by Sam Bushell for QuickTime "Live" '99// WWDC 2000 Introduction to QuickTime#include "MacShell.h"void ScaleAndRotate( void ){ OSErr err = noErr; Handle hOpenTypeList = NewHandle(0); long numTypes = 0; FSSpec theFSSpec; GraphicsImportComponent importer = 0; Rect naturalBounds, windowBounds, scaledBounds; WindowPtr window = NULL; MatrixRecord matrix; Fixed naturalWidth, naturalHeight; FixedPoint fromQuad[4], toQuad[4]; BuildGraphicsImporterValidFileTypes( hOpenTypeList, &numTypes ); HLock( hOpenTypeList ); err = GetOneFileWithPreview(numTypes, (OSTypePtr)*hOpenTypeList, &theFSSpec, NULL); DisposeHandle( hOpenTypeList ); if ( err ) return; // locate and open a graphics importer component err = GetGraphicsImporterForFile( &theFSSpec, &importer ); // get the native size of the image associated with the importer err = GraphicsImportGetNaturalBounds( importer, &naturalBounds ); windowBounds = naturalBounds; OffsetRect( &windowBounds, 10, 45 ); window = NewCWindow( NULL, &windowBounds, "\pScale and Rotate ", true, documentProc, (WindowPtr)-1, true, 0); // set the graphics port for drawing err = GraphicsImportSetGWorld( importer, GetWindowPort( window ), NULL ); // draw the image err = GraphicsImportDraw( importer ); pause(); // scale the image by a factor of 2x. // the top-left coordinate of an image's natural bounds is always (0,0). scaledBounds = naturalBounds; scaledBounds.right = scaledBounds.right * 2; scaledBounds.bottom = scaledBounds.bottom * 2; // define the rectangle in which to draw an image err = GraphicsImportSetBoundsRect( importer, // importer instance &scaledBounds ); // desired bounds // resize the window to fit, and redraw. SizeWindow( window, scaledBounds.right, scaledBounds.bottom, false ); err = GraphicsImportDraw( importer ); pause(); // rotate the image ninety degrees clockwise // set the contents of a matrix so that it performs no transformation SetIdentityMatrix( &matrix ); // modify the contents of a matrix so that it defines a rotation operation // 90 degrees to the right - anchor at 0.0 top-left RotateMatrix( &matrix, // pointer to the matrix structure Long2Fix( 90 ), // the number of degrees of rotation NOTE: THIS IS A FIXED VALUE 0, // x coordinate of anchor point 0 ); // y coordinate of anchor point // we need to return the top-left corner of the rotated image back to it's // origin, so add a translation value to a specified matrix TranslateMatrix( &matrix, // pointer to the matrix structure Long2Fix( naturalBounds.bottom ), // deltaH - value added to the x coordinate NOTE: FIXED VALUES 0 ); // deltaV - value added to the y coordinate // set the transformation matrix to use for drawing an image err = GraphicsImportSetMatrix( importer, &matrix ); // resize the window to fit, and redraw. // get the new bounds rect, size the window then draw err = GraphicsImportGetBoundsRect( importer, &scaledBounds ); SizeWindow( window, scaledBounds.right, scaledBounds.bottom, false ); err = GraphicsImportDraw( importer ); pause(); // give the image some hefty perspective. // set up two quadrilateral coordinates and create a translation matrix // from one to the other using QuadToQuadMatrix() // QuadToQuadMatrix was added in QuickTime 4.0. naturalWidth = Long2Fix( naturalBounds.right ); naturalHeight = Long2Fix( naturalBounds.bottom ); fromQuad[0].x = 0; fromQuad[0].y = 0; fromQuad[1].x = naturalWidth; fromQuad[1].y = 0; fromQuad[2].x = naturalWidth; fromQuad[2].y = naturalHeight; fromQuad[3].x = 0; fromQuad[3].y = naturalHeight; toQuad[0].x = naturalWidth/8; toQuad[0].y = naturalHeight/4; toQuad[1].x = naturalWidth*9/8; toQuad[1].y = 0; toQuad[2].x = naturalWidth; toQuad[2].y = naturalHeight*6/4; toQuad[3].x = 0; toQuad[3].y = naturalHeight; SetIdentityMatrix( &matrix ); QuadToQuadMatrix( (Fixed *)fromQuad, (Fixed *)toQuad, &matrix ); err = GraphicsImportSetMatrix( importer, &matrix ); // resize the window to fit, and redraw // get the new bounds rect, size the window then draw err = GraphicsImportGetBoundsRect( importer, &scaledBounds ); SizeWindow( window, scaledBounds.right, scaledBounds.bottom, false ); SetPortWindowPort( window ); EraseRect( &scaledBounds ); err = GraphicsImportDraw( importer ); CloseComponent( importer );}</pre>
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