的Photoshop插件使用可可 - 如何获得预览

Question

我执行的Mac上的Photoshop插件，和我使用可可这样做。做的不错，到目前为止，但下一步是提供一个“预览”的形象，因为我的插件窗口的一部分，和我被困。我是一个的n00b的OBJ-C程序员，这是不真正帮助:-)

到目前为止，我已经得到的东西是这样的：

int dataSize = gFilterRecord->bigDocumentData->wholeSize32.v *
               gFilterRecord->bigDocumentData->wholeSize32.h *
               gFilterRecord->planes; 

NSData *inData = [[NSData alloc] initWithBytesNoCopy:gFilterRecord->inData length:dataSize freeWhenDone:NO];
NSLog(@"LoadImageFromSDK : Data created");
NSImage *imageTmp = [[NSImage alloc] initWithData:inData];
NSLog(@"LoadImageFromSDK : Image created");

//Save to PNG file as a test of this image creation
[[imageTmp TIFFRepresentation] writeToFile:@"/tmp/imageTmp.tif" atomically:YES];
NSLog(@"LoadImageFromSDK : Wrote image to disk");

目前，它崩溃可怕上：结果     22年9月7日上午10时23分32秒的Adobe Photoshop元素[46628] *** NSCopyMemoryPages（为0x0，0x245f4000，2265088）失败

我可能计算INDATA的大小不正确。救命？

而且，NSImage中将是能够正确解释该图像数据blob？或者我应该放弃，只是做了逐像素映射到NSImage中？

Answer 1

确定，这是方式更痛苦找出比我的预期。此外，荣誉Nvidia的张贴此 PDF 这是一个Photoshop的SDK过滤器记录比实际SDK文档的更好的解释。

此代码实际上读取INDATA并产生NSImage中使用（很多记录的只是要弄清楚它是什么做的，随意删除），除了样品TIF文件进行调试。

NSLog(@"Entering LoadImageFromSDK");

unsigned char *bitmapPlanes[4];    
bitmapPlanes[0] = (unsigned char *) (gFilterRecord->inData);

NSLog(@"Params to create bitmap");
NSLog(@"pixelsWide = %d", gFilterRecord->bigDocumentData->imageSize32.h );
NSLog(@"pixelsHigh = %d", gFilterRecord->bigDocumentData->imageSize32.v );
NSLog(@"bitsPerSample = %d", gFilterRecord->depth );
NSLog(@"samplesPerPixel = %d", gFilterRecord->planes );
NSLog(@"hasAlpha = %d", NO );
NSLog(@"isPlanar = %d", NO );
NSLog(@"colorSpaceName = %@", mapImageModeToColorSpace(gFilterRecord->imageMode) );
NSLog(@"bytesPerRow = %d", gFilterRecord->inRowBytes );
NSLog(@"bitsPerPixel = %d", gFilterRecord->depth*gFilterRecord->planes );    

NSBitmapImageRep *bitmapTmp = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:bitmapPlanes
                                                                      pixelsWide:gFilterRecord->bigDocumentData->imageSize32.h
                                                                      pixelsHigh:gFilterRecord->bigDocumentData->imageSize32.v
                                                                   bitsPerSample:gFilterRecord->depth
                                                                 samplesPerPixel:gFilterRecord->planes
                                                                        hasAlpha:NO 
                                                                        isPlanar:NO 
                                                                  colorSpaceName:mapImageModeToColorSpace(gFilterRecord->imageMode) 
                                                                     bytesPerRow:gFilterRecord->inRowBytes
                                                                    bitsPerPixel:gFilterRecord->depth*gFilterRecord->planes];

NSLog(@"LoadImageFromSDK : Bitmap created = %@", bitmapTmp);

[[bitmapTmp TIFFRepresentation] writeToFile:@"/Users/someuser/temp/sample.tif" atomically:YES];


NSImage *imageTmp = [[NSImage alloc] initWithSize:[bitmapTmp size]];
[imageTmp addRepresentation:bitmapTmp];
NSLog(@"LoadImageFromSDK : Image created = %@", imageTmp);