C Source/Utilities.c

//////////////////////////////////////////////////////////////////////////////////
/*
    File:       Utilities.c
 
    Project:    CarbonEvent Shell
 
    Contains:   Implementation of the utilities
    
    Author:     Todd Previte
    
    Copyright:  2001 Apple Computer, Inc., All Rights Reserved
 
    Copyright:  (c) 2002 Apple Computer, Inc., All Rights Reserved
    
    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 AppleÕs
    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.
      
 
*/
//////////////////////////////////////////////////////////////////////////////////
 
#include "Utilities.h"
 
// MemAlloc
// Simple memory allocation wrapper
void* MemAlloc(unsigned long memsize)
{
    if(memsize <= 0)
    return NULL;
    else
    return (malloc(memsize));
}
 
// MemDealloc
// Simple memory free wrapper
bool MemDealloc(void* memblock)
{
    if(memblock == NULL)
    return FALSE;
    else
    {
    free(memblock);
    return TRUE;
    }
}
 
// Swap2Byte
// Byte swapper for a 2-byte variable
void Swap2Byte(short* memblock)
{
    *memblock = ((*memblock >> 8) & 0x00FF) | ((*memblock << 8) & 0xFF00);
}
 
// Swap4Byte
// Byte swapper for a 4-byte variable
void Swap4Byte(long* longRef)
{
    *longRef =  ((*longRef >> 24) & 0x000000FF) | 
                ((*longRef >> 8)  & 0x0000FF00) |
                ((*longRef << 8)  & 0x00FF0000) |
        ((*longRef << 24) & 0xFF000000);
 
}
 
// Swap4Byte
// Byte swapper for a 8-byte variable
void Swap8Byte(double memblock)
{
// This function is non-operational
/*
    char byteArray[8];
    byteArray[0] = ((memblock >> 56) & 0x00000000000000FF);
    byteArray[1] = ((memblock >> 48) & 0x000000000000FF00);
    byteArray[2] = ((memblock >> 40) & 0x0000000000FF0000);
    byteArray[3] = ((memblock >> 32) & 0x00000000FF000000);
    byteArray[4] = ((memblock << 8)  & 0x000000FF00000000);
    byteArray[5] = ((memblock << 40) & 0x0000FF0000000000);
    byteArray[6] = ((memblock << 48) & 0x00FF000000000000);
    byteArray[7] = ((memblock << 56) & 0xFF00000000000000);
*/
}
 
// ByteSwapShort
// Just another name for the 2-byte swap
void ByteSwapShort(short* shortRef)
{
    *shortRef = ((*shortRef >> 8) & 0x00FF) | ((*shortRef << 8) & 0xFF00);
}
 
// ByteSwapInt
// Another name for the 4-byte swap
void ByteSwapInt(int* intRef)
{
    *intRef =   ((*intRef >> 24) & 0x000000FF) | 
                ((*intRef >> 8)  & 0x0000FF00) |
                ((*intRef << 8)  & 0x00FF0000) |
        ((*intRef << 24) & 0xFF000000);
}
 
// ByteSwapLong
// Another name for the 4-byte swap
void ByteSwapLong(long* longRef)
{
    *longRef =  ((*longRef >> 24) & 0x000000FF) | 
                ((*longRef >> 8)  & 0x0000FF00) |
                ((*longRef << 8)  & 0x00FF0000) |
        ((*longRef << 24) & 0xFF000000);
}
 
// ByteSwapFloat
// Yet another name for the 4-byte swap
void ByteSwapFloat(float* floatRef)
{
    ByteSwapLong((long*) floatRef);
}
 
void RectToGLRect(GLRect* newGLRect, Rect* newRect)
{
    newGLRect->x        = newRect->left;
    newGLRect->y        = newRect->bottom;
    newGLRect->width    = newRect->right - newRect->left;
    newGLRect->height   = newRect->bottom - newRect->top;
    newGLRect->center.x = newGLRect->width / 2;
    newGLRect->center.y = newGLRect->height / 2;
}
 
void GLRectToRect(GLRect* newGLRect, Rect* newRect)
{
    newRect->left       = newGLRect->x;
    newRect->bottom     = newGLRect->height;
    newRect->right      = newGLRect->width;
    newRect->top        = newGLRect->y;
}
 
char* CStringToPString(char *string)
{
    char *newString = MemAlloc(strlen(string) + 1);
    long i = 0;
 
    for(i = 0; i < strlen(string); i++)
    newString[i+1] = string[i];
    
    newString[0] = i;
    
    return newString;
}
 
char* PStringToCString(char *string)
{
    char *newString = malloc(string[0] + 1);
    long i = 0;
    
    for (i = 0; i < string[0]; i++)
        newString[i] = string[i + 1];
    
    newString[string[0]] = '\0';
    
    return newString;
}
 
HFSUniStr255* GetAppPath(void)
{
    FSSpec fileSpec;
    HFSUniStr255 *uniFileName;
    FSRef processRef;
    FSCatalogInfo processInfo;
    ProcessSerialNumber psn = {0, kCurrentProcess};
    uniFileName = MemAlloc(sizeof(HFSUniStr255));
    GetProcessBundleLocation(&psn, &processRef);
    FSGetCatalogInfo(&processRef, kFSCatInfoNodeFlags, &processInfo, uniFileName, &fileSpec, NULL);
 
    return uniFileName;
}
 
void GetAppFSSpec(FSSpec *fileSpec)
{
    FSRef processRef;
    FSCatalogInfo processInfo;
    ProcessSerialNumber psn = {0, kCurrentProcess};
    GetProcessBundleLocation(&psn, &processRef);
    FSGetCatalogInfo(&processRef, kFSCatInfoNodeFlags, &processInfo, NULL, fileSpec, NULL);
}
 
void InvertGLImage(char *imageData, long imageSize, long rowBytes)
{
    long i, j;
    long numRows = 0;
    char *tBuffer = NULL;
    
    i = j = 0;
    
    tBuffer = (char*)malloc((size_t)imageSize);
    if (!tBuffer)
    {
            printf("Out of memory!");
            return; // continue without flip
    }
    
    numRows = imageSize / rowBytes;
    
    // Copy rows into tmp buffer one at a time, reversing their order
    for (i = 0, j = imageSize - rowBytes; i < imageSize; i += rowBytes, j -= rowBytes)
        memcpy( &tBuffer[j], &imageData[i], (size_t)rowBytes );
 
    // Copy tmp buffer back into original buffer
    memcpy(imageData, tBuffer, (size_t)imageSize);
    free(tBuffer);
}
 
void ProcessImageArray(long imgCount, GWorldPtr *imgArray)
{
    // Here's where we'll actually export the images
    OSErr           err     = noErr;
    ComponentResult     cErr    = 0;
    GWorldPtr           img = NULL;
    GraphicsExportComponent     geComp  = NULL;
 
    FSSpec          imgFile;
    OSType          osFileType  = kQTFileTypeJPEG;    
    char            cstrPath[]  = "Snapshot";
    StringPtr           fileName    = CStringToPString(cstrPath);
    int             fileCount   = 0;
    int             i = 0;
    
    // NOTE: Look in QuickTimeComponents.h for osFileType definitions
    err = OpenADefaultComponent(GraphicsExporterComponentType, osFileType, &geComp);
    if (err != noErr)
    {
    printf("ERROR: %i in OpenADefaultComponent()", err);
    return; // FIXME:
    }
    
    // Loop through the GWorlds and export them
    for(i = 0; i < imgCount; i++)
    {
    // Reset the file name
    fileName = CStringToPString(cstrPath);
    // create an FSSpec for the file containing the exported image    
    GetAppFSSpec(&imgFile);
 
    // Loop through to find the current file name
    // This routine is slow and brute force, but it works
    while(1)
    {
        sprintf(cstrPath, "Snapshot%i.jpg", fileCount);
        fileName = CStringToPString(cstrPath);
        err = FSMakeFSSpec(imgFile.vRefNum, imgFile.parID, fileName, &imgFile);
        if(err == noErr) // File exists. Increment and continue
        {
        fileCount++;
        continue;
        }
        if(err == fnfErr) // File does not exist, so we're good to go.
        {
        break;
        }
        if(err != noErr && err != fnfErr)
        {
        printf("ERROR: %i in FSMakeFSSpec()", err);
        break;
        }
    }
 
    // Get the next GWorld in the buffer
    img = imgArray[i];
    
    // Set the input GWorld for the exporter
    cErr = GraphicsExportSetInputGWorld(geComp, img);
    if (cErr != noErr)
    {
        printf("ERROR: %i in GraphicsExportSetInputGWorld()", cErr);
        return; // FIXME:
    }
    
    // Set the output file to our FSSpec
    cErr = GraphicsExportSetOutputFile(geComp, &imgFile);
    if (cErr != noErr)
    {
        printf("ERROR: %i in GraphicsExportSetOutputFile()", cErr);
        return; // FIXME:
    }
    
    // Set the compression quality (needed for JPEG, not necessarily for other formats)
    cErr = GraphicsExportSetCompressionQuality(geComp, codecLosslessQuality);
    if (cErr != noErr)
    {
        printf("ERROR: %i in GraphicsExportSetCompressionQuality()", cErr);
        return; // FIXME:
    }
    
    // Export it
    cErr = GraphicsExportDoExport(geComp, NULL);
    if (cErr != noErr)
    {
        printf("ERROR: %i in GraphicsExportDoExport()", cErr);
        return; // FIXME:
    }
    }
 
    // finally, close the component
    if (geComp != NULL)
        CloseComponent(geComp);
}
 
OSStatus MPProcessImageAsync(void* params)
{
    if(MPTaskIsPreemptive(MPCurrentTaskID()))
    ProcessImageArray(imageCount, gwBuffer);
    else
    {
    MPTaskID tMPTaskID;
    MPCreateTask( MPProcessImageAsync,
            NULL,
            16384,
            kInvalidID,
            NULL,
            NULL,
            0,
            &tMPTaskID);
    }
    return noErr;
}


Copyright © 2003 Apple Computer, Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2003-07-07