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![Katayama Hirofumi MZ](/assets/img/avatar_default.png)
Consistent behavior of the application. - Add ShiftPtStack and BuildMaskFromPtStack helper functions. - Move some codes of selectionModel to mouse.cpp. CORE-19226
359 lines
8.2 KiB
C++
359 lines
8.2 KiB
C++
/*
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* PROJECT: PAINT for ReactOS
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* LICENSE: LGPL-2.0-or-later (https://spdx.org/licenses/LGPL-2.0-or-later)
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* PURPOSE: Undo and redo functionality
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* COPYRIGHT: Copyright 2015 Benedikt Freisen <b.freisen@gmx.net>
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* Copyright 2023 Katayama Hirofumi MZ <katayama.hirofumi.mz@gmail.com>
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*/
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#include "precomp.h"
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ImageModel imageModel;
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/* FUNCTIONS ********************************************************/
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void IMAGE_PART::clear()
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{
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::DeleteObject(m_hbmImage);
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m_hbmImage = NULL;
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m_rcPart.SetRectEmpty();
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m_bPartial = FALSE;
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}
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void ImageModel::NotifyImageChanged()
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{
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if (canvasWindow.IsWindow())
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{
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canvasWindow.updateScrollRange();
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canvasWindow.Invalidate();
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}
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if (miniature.IsWindow())
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miniature.Invalidate();
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}
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ImageModel::ImageModel()
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: m_hDrawingDC(::CreateCompatibleDC(NULL))
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, m_currInd(0)
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, m_undoSteps(0)
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, m_redoSteps(0)
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{
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ZeroMemory(m_historyItems, sizeof(m_historyItems));
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m_hbmMaster = CreateColorDIB(1, 1, RGB(255, 255, 255));
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m_hbmOld = ::SelectObject(m_hDrawingDC, m_hbmMaster);
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g_imageSaved = TRUE;
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}
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ImageModel::~ImageModel()
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{
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::SelectObject(m_hDrawingDC, m_hbmOld); // De-select
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::DeleteDC(m_hDrawingDC);
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::DeleteObject(m_hbmMaster);
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ClearHistory();
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}
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void ImageModel::SwapPart()
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{
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IMAGE_PART& part = m_historyItems[m_currInd];
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if (!part.m_bPartial)
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{
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Swap(m_hbmMaster, part.m_hbmImage);
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return;
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}
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HBITMAP hbmMaster = LockBitmap();
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HBITMAP hbmPart = getSubImage(hbmMaster, part.m_rcPart);
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putSubImage(hbmMaster, part.m_rcPart, part.m_hbmImage);
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::DeleteObject(part.m_hbmImage);
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part.m_hbmImage = hbmPart;
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UnlockBitmap(hbmMaster);
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}
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void ImageModel::Undo(BOOL bClearRedo)
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{
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ATLTRACE("%s: %d\n", __FUNCTION__, m_undoSteps);
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if (!CanUndo())
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return;
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selectionModel.HideSelection();
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m_currInd = (m_currInd + HISTORYSIZE - 1) % HISTORYSIZE; // Go previous
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ATLASSERT(m_hbmMaster != NULL);
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SwapPart();
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::SelectObject(m_hDrawingDC, m_hbmMaster); // Re-select
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m_undoSteps--;
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if (bClearRedo)
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m_redoSteps = 0;
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else if (m_redoSteps < HISTORYSIZE - 1)
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m_redoSteps++;
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NotifyImageChanged();
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}
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void ImageModel::Redo()
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{
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ATLTRACE("%s: %d\n", __FUNCTION__, m_redoSteps);
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if (!CanRedo())
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return;
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selectionModel.HideSelection();
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ATLASSERT(m_hbmMaster != NULL);
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SwapPart();
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m_currInd = (m_currInd + 1) % HISTORYSIZE; // Go next
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::SelectObject(m_hDrawingDC, m_hbmMaster); // Re-select
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m_redoSteps--;
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if (m_undoSteps < HISTORYSIZE - 1)
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m_undoSteps++;
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NotifyImageChanged();
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}
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void ImageModel::ClearHistory()
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{
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for (int i = 0; i < HISTORYSIZE; ++i)
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{
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m_historyItems[i].clear();
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}
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m_undoSteps = 0;
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m_redoSteps = 0;
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}
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void ImageModel::PushImageForUndo()
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{
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HBITMAP hbm = CopyBitmap();
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if (hbm == NULL)
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{
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ShowOutOfMemory();
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return;
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}
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PushImageForUndo(hbm);
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}
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void ImageModel::PushImageForUndo(HBITMAP hbm)
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{
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ATLTRACE("%s: %d\n", __FUNCTION__, m_currInd);
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if (hbm == NULL)
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{
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ShowOutOfMemory();
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return;
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}
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IMAGE_PART& part = m_historyItems[m_currInd];
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part.clear();
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part.m_hbmImage = m_hbmMaster;
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m_hbmMaster = hbm;
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::SelectObject(m_hDrawingDC, m_hbmMaster); // Re-select
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PushDone();
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}
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void ImageModel::PushImageForUndo(const RECT& rcPartial)
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{
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ATLTRACE("%s: %d\n", __FUNCTION__, m_currInd);
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IMAGE_PART& part = m_historyItems[m_currInd];
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part.clear();
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part.m_bPartial = TRUE;
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part.m_rcPart = rcPartial;
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CRect rcImage = { 0, 0, GetWidth(), GetHeight() };
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CRect& rc = part.m_rcPart;
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if (!rc.IntersectRect(rc, rcImage))
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rc.SetRect(-1, -1, 0, 0);
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HBITMAP hbmMaster = LockBitmap();
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part.m_hbmImage = getSubImage(hbmMaster, rc);
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UnlockBitmap(hbmMaster);
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PushDone();
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}
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void ImageModel::PushDone()
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{
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m_currInd = (m_currInd + 1) % HISTORYSIZE; // Go next
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if (m_undoSteps < HISTORYSIZE - 1)
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m_undoSteps++;
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m_redoSteps = 0;
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g_imageSaved = FALSE;
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NotifyImageChanged();
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}
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void ImageModel::Crop(int nWidth, int nHeight, int nOffsetX, int nOffsetY)
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{
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// We cannot create bitmaps of size zero
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if (nWidth <= 0)
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nWidth = 1;
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if (nHeight <= 0)
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nHeight = 1;
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// Create a white HBITMAP
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HBITMAP hbmNew = CreateColorDIB(nWidth, nHeight, RGB(255, 255, 255));
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if (!hbmNew)
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{
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ShowOutOfMemory();
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return;
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}
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// Put the master image as a sub-image
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RECT rcPart = { -nOffsetX, -nOffsetY, GetWidth() - nOffsetX, GetHeight() - nOffsetY };
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HBITMAP hbmOld = imageModel.LockBitmap();
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putSubImage(hbmNew, rcPart, hbmOld);
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imageModel.UnlockBitmap(hbmOld);
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// Push it
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PushImageForUndo(hbmNew);
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NotifyImageChanged();
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}
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void ImageModel::SaveImage(LPCWSTR lpFileName)
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{
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SaveDIBToFile(m_hbmMaster, lpFileName, TRUE);
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}
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BOOL ImageModel::IsImageSaved() const
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{
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return g_imageSaved;
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}
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void ImageModel::StretchSkew(int nStretchPercentX, int nStretchPercentY, int nSkewDegX, int nSkewDegY)
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{
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int oldWidth = GetWidth();
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int oldHeight = GetHeight();
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INT newWidth = oldWidth * nStretchPercentX / 100;
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INT newHeight = oldHeight * nStretchPercentY / 100;
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if (oldWidth != newWidth || oldHeight != newHeight)
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{
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HBITMAP hbm0 = CopyDIBImage(m_hbmMaster, newWidth, newHeight);
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PushImageForUndo(hbm0);
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}
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if (nSkewDegX)
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{
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HBITMAP hbm1 = SkewDIB(m_hDrawingDC, m_hbmMaster, nSkewDegX, FALSE);
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PushImageForUndo(hbm1);
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}
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if (nSkewDegY)
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{
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HBITMAP hbm2 = SkewDIB(m_hDrawingDC, m_hbmMaster, nSkewDegY, TRUE);
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PushImageForUndo(hbm2);
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}
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NotifyImageChanged();
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}
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int ImageModel::GetWidth() const
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{
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return GetDIBWidth(m_hbmMaster);
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}
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int ImageModel::GetHeight() const
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{
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return GetDIBHeight(m_hbmMaster);
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}
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void ImageModel::InvertColors()
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{
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RECT rect = {0, 0, GetWidth(), GetHeight()};
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PushImageForUndo();
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InvertRect(m_hDrawingDC, &rect);
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NotifyImageChanged();
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}
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HDC ImageModel::GetDC()
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{
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return m_hDrawingDC;
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}
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void ImageModel::FlipHorizontally()
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{
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PushImageForUndo();
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StretchBlt(m_hDrawingDC, GetWidth() - 1, 0, -GetWidth(), GetHeight(), GetDC(), 0, 0,
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GetWidth(), GetHeight(), SRCCOPY);
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NotifyImageChanged();
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}
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void ImageModel::FlipVertically()
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{
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PushImageForUndo();
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StretchBlt(m_hDrawingDC, 0, GetHeight() - 1, GetWidth(), -GetHeight(), GetDC(), 0, 0,
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GetWidth(), GetHeight(), SRCCOPY);
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NotifyImageChanged();
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}
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void ImageModel::RotateNTimes90Degrees(int iN)
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{
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switch (iN)
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{
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case 1:
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case 3:
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{
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HBITMAP hbm = Rotate90DegreeBlt(m_hDrawingDC, GetWidth(), GetHeight(), iN == 1, FALSE);
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PushImageForUndo(hbm);
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break;
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}
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case 2:
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{
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PushImageForUndo();
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::StretchBlt(m_hDrawingDC, GetWidth() - 1, GetHeight() - 1, -GetWidth(), -GetHeight(),
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m_hDrawingDC, 0, 0, GetWidth(), GetHeight(), SRCCOPY);
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break;
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}
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}
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NotifyImageChanged();
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}
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void ImageModel::Clamp(POINT& pt) const
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{
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pt.x = max(0, min(pt.x, GetWidth()));
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pt.y = max(0, min(pt.y, GetHeight()));
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}
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HBITMAP ImageModel::CopyBitmap()
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{
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HBITMAP hBitmap = LockBitmap();
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HBITMAP ret = CopyDIBImage(hBitmap);
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UnlockBitmap(hBitmap);
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return ret;
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}
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BOOL ImageModel::IsBlackAndWhite()
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{
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HBITMAP hBitmap = LockBitmap();
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BOOL bBlackAndWhite = IsBitmapBlackAndWhite(hBitmap);
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UnlockBitmap(hBitmap);
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return bBlackAndWhite;
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}
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void ImageModel::PushBlackAndWhite()
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{
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HBITMAP hBitmap = LockBitmap();
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HBITMAP hNewBitmap = ConvertToBlackAndWhite(hBitmap);
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UnlockBitmap(hBitmap);
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PushImageForUndo(hNewBitmap);
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}
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HBITMAP ImageModel::LockBitmap()
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{
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// NOTE: An app cannot select a bitmap into more than one device context at a time.
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::SelectObject(m_hDrawingDC, m_hbmOld); // De-select
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HBITMAP hbmLocked = m_hbmMaster;
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m_hbmMaster = NULL;
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return hbmLocked;
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}
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void ImageModel::UnlockBitmap(HBITMAP hbmLocked)
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{
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m_hbmMaster = hbmLocked;
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m_hbmOld = ::SelectObject(m_hDrawingDC, m_hbmMaster); // Re-select
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}
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