//=============================PluginMain Start====================== DLLExport MACPASCAL void PluginMain (const short selector, PISelectionParams *selectionParamBlock, long *data,short *result) { //显示About对话框 if (selector == selectionSelectorAbout) { DoAbout((AboutRecordPtr)selectionParamBlock); } else { static const FProc routineForSelector = { /* selectionSelectorAbout DoAbout, */ /* selectionSelectorExecute */DoExecute }; Ptr globalPtr = NULL;// Pointer for global structure GPtr globals = NULL; // actual globals //包装selectionParamBlock到globals中，真正有用的还是globals-＞selectionParamBlock globalPtr = AllocateGlobals ((uint32)result, (uint32)selectionParamBlock, selectionParamBlock-＞handleProcs, sizeof(Globals), data, InitGlobals); if (globalPtr == NULL) { *result = memFullErr;return; } globals = (GPtr)globalPtr; //调用 DoExecute 函数 if (selector ＞ selectionSelectorAbout && selector ＜= selectionSelectorExecute) (routineForSelector[selector-1])(globals); else gResult = selectionBadParameters; if ((Handle)*data != NULL) PIUnlockHandle((Handle)*data); } // about selector special } //=============================PluginMain End================================= //=============================DoExecute Start================================= void DoExecute (GPtr globals) { //一些变量声明，省略 // // //从剪贴板中读取自己定义格式的选区信息，保存到全局变量中，我加的 //省略部分内容 gQueryForParameters = ReadScriptParams (globals); gStuff-＞treatment = 0;//KeyToEnum(EnumToKey(gCreate,typeMyCreate),typeMyPISel);
//忽略原程序的UI参数处理 //获取读取端口 gResult = ReadFromWritePort(&selectionRead, selection-＞port); //省略部分内容 //分配内存 gResult = AllocateBuffer (kBufferSize, &sBuffer); if (gResult != noErr) goto CleanUp; gResult = AllocateBuffer (kBufferSize, &dBuffer); if (gResult != noErr) goto CleanUp; gResult = AllocateBuffer (kBufferSize, &rBuffer); if (gResult != noErr) goto CleanUp; sData = LockBuffer (sBuffer, false); dData = LockBuffer (dBuffer, false); rData = LockBuffer (rBuffer, false); //省略部分内容 //统计要处理的通道 curChannel = composite; while (curChannel != NULL) { if (DoTarget curChannel-＞target : curChannel-＞shown) total += AccountChannel (curChannel, transparency, selection); curChannel = curChannel-＞next; } //进行实际的处理工作 while (curChannel != NULL) { if (DoTarget curChannel-＞target : curChannel-＞shown) { ApplyChannel (globals, curChannel, &sDesc, transparency, &mDesc, selection, selectionRead, &dDesc, &rDesc, &done, total); if (gResult != noErr) goto CleanUp; } curChannel = curChannel-＞next; } //善后工作 } //=========DoExecute End===========//========ApplyChannel Start======== static void ApplyChannel (GPtr globals, ReadChannelDesc *source, PixelMemoryDesc *sDesc, ReadChannelDesc *mask, PixelMemoryDesc *mDesc, WriteChannelDesc *dest, ChannelReadPort destRead, PixelMemoryDesc *dDesc, PixelMemoryDesc *rDesc, int32 *done,int32 total) { //声明变量，参数检查，省略 //内层循环中，每次读取64×64的块处理 //#define kBlockRows 64 for (row = limit.top; row ＜ limit.bottom; row += kBlockRows) for (col = limit.left; col ＜ limit.right; col += kBlockCols) { //省略部分内容 gResult = ReadPixels (destRead, &scaling, &area, dDesc, &wrote); //省略部分内容 gResult = ReadPixels (source-＞port, &scaling, &area, sDesc, &wrote); s = (unsigned8 *) sDesc-＞data;//这里是原图象数据 d = (unsigned8 *) dDesc-＞data;//这里保存处理结果 //逐个象素处理64×64的块 for (row2 = 0; row2 ＜ kBlockRows; ++row2) { int y = row + row2; for (col2 = 0; col2 ＜ kBlockCols; ++col2) { int x = col + col2; int nRc = 0; bool bFound = false; while(nRc ＜ g_rcCount)//g_rcCount是一共要显示的区域数，通过剪贴板传递计算 { if(PtInRect(&g_rcArr[nRc],x,y
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