X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/2bda0e173844e8e0f8acf4e8ad8b5c26e5c6fe5d..a637417cf7b30a7438e8b72e9e61a4a33759e1f3:/src/msw/dc.cpp?ds=sidebyside diff --git a/src/msw/dc.cpp b/src/msw/dc.cpp index 9a63615fea..f3c558bf11 100644 --- a/src/msw/dc.cpp +++ b/src/msw/dc.cpp @@ -5,1628 +5,2436 @@ // Modified by: // Created: 01/02/97 // RCS-ID: $Id$ -// Copyright: (c) Julian Smart and Markus Holzem -// Licence: wxWindows licence +// Copyright: (c) Julian Smart +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "dc.h" +// =========================================================================== +// declarations +// =========================================================================== + +// --------------------------------------------------------------------------- +// headers +// --------------------------------------------------------------------------- + +#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) + #pragma implementation "dc.h" #endif // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ -#pragma hdrstop + #pragma hdrstop #endif #ifndef WX_PRECOMP -#include "wx/frame.h" -#include "wx/dc.h" -#include "wx/utils.h" -#include "wx/dialog.h" -#include "wx/app.h" + #include "wx/window.h" + #include "wx/dc.h" + #include "wx/utils.h" + #include "wx/dialog.h" + #include "wx/app.h" + #include "wx/bitmap.h" + #include "wx/dcmemory.h" + #include "wx/log.h" + #include "wx/icon.h" #endif +#include "wx/msw/private.h" // needs to be before #include + +#include "wx/sysopt.h" #include "wx/dcprint.h" -#include "wx/msw/private.h" +#include "wx/module.h" +#include "wx/dynload.h" + +#ifdef wxHAVE_RAW_BITMAP +#include "wx/rawbmp.h" +#endif #include #include -#include -#if USE_COMMON_DIALOGS -#include +#if wxUSE_COMMON_DIALOGS && !defined(__WXMICROWIN__) + #include #endif #ifndef __WIN32__ -#include + #include #endif -#ifdef DrawText -#undef DrawText +#ifndef AC_SRC_ALPHA +#define AC_SRC_ALPHA 1 #endif -#ifdef GetCharWidth -#undef GetCharWidth +/* Quaternary raster codes */ +#ifndef MAKEROP4 +#define MAKEROP4(fore,back) (DWORD)((((back) << 8) & 0xFF000000) | (fore)) #endif -#ifdef StartDoc -#undef StartDoc -#endif +IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase) -#if !USE_SHARED_LIBRARY -IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject) -#endif +// --------------------------------------------------------------------------- +// constants +// --------------------------------------------------------------------------- -// Declarations local to this file +static const int VIEWPORT_EXTENT = 1000; -#define YSCALE(y) (yorigin - (y)) +static const int MM_POINTS = 9; +static const int MM_METRIC = 10; -// #define wx_round(a) (int)((a)+.5) +// usually this is defined in math.h +#ifndef M_PI + static const double M_PI = 3.14159265358979323846; +#endif // M_PI -// Default constructor -wxDC::wxDC(void) -{ - // Stop internal GDI objects being found and pointers kept - // after these objects have been deleted. - // No - it's OK; these lists won't return them - // because their 'visible' status will be FALSE. -/* - wxTheFontList->RemoveFont(&m_font); - wxThePenList->RemovePen(&m_pen); - wxTheBrushList->RemoveBrush(&m_brush); - wxTheBrushList->RemoveBrush(&m_backgroundBrush); -*/ - - m_minX = 0; m_minY = 0; m_maxX = 0; m_maxY = 0; - m_clipping = FALSE; - m_autoSetting = TRUE ; -// m_scaleGDI = TRUE; - - m_filename = ""; -// m_selectedBitmap = NULL; - m_canvas = NULL; -/* - cur_dc = NULL ; - cur_bk = 0 ; - cur_cpen = NULL ; - cur_cbrush = NULL ; -*/ - m_oldBitmap = 0; - m_oldPen = 0; - m_oldBrush = 0; - m_oldFont = 0; - m_oldPalette = 0; - m_minX = 0; m_minY = 0; m_maxX = 0; m_maxY = 0; -// m_font = NULL; - m_logicalOriginX = 0; - m_logicalOriginY = 0; - m_deviceOriginX = 0; - m_deviceOriginY = 0; - m_logicalScaleX = 1.0; - m_logicalScaleY = 1.0; - m_userScaleX = 1.0; - m_userScaleY = 1.0; - m_systemScaleX = 1.0; - m_systemScaleY = 1.0; - m_mappingMode = MM_TEXT; -// m_dontDelete = FALSE; - m_bOwnsDC = FALSE; - m_hDC = 0; - m_clipping = FALSE; - m_ok = TRUE; - m_windowExtX = VIEWPORT_EXTENT; - m_windowExtY = VIEWPORT_EXTENT; - m_logicalFunction = -1; - - m_backgroundBrush = *wxWHITE_BRUSH; -// m_backgroundBrush.UseResource(); - - m_textForegroundColour = *wxBLACK; - m_textBackgroundColour = *wxWHITE; - - m_colour = wxColourDisplay(); - - m_hDCCount = 0; -} - - -wxDC::~wxDC(void) -{ - if ( m_hDC != 0 ) { - SelectOldObjects(m_hDC); - if ( m_bOwnsDC ) { - if ( m_canvas == NULL ) - ::DeleteDC((HDC)m_hDC); - else - ::ReleaseDC((HWND)m_canvas->GetHWND(), (HDC)m_hDC); - } - } +// ROPs which don't have standard names (see "Ternary Raster Operations" in the +// MSDN docs for how this and other numbers in wxDC::Blit() are obtained) +#define DSTCOPY 0x00AA0029 // a.k.a. NOP operation + +// ---------------------------------------------------------------------------- +// macros for logical <-> device coords conversion +// ---------------------------------------------------------------------------- /* - if (m_hDC) - { - SelectOldObjects(m_hDC); - ::DeleteDC((HDC) m_hDC); - } -*/ -} + We currently let Windows do all the translations itself so these macros are + not really needed (any more) but keep them to enhance readability of the + code by allowing to see where are the logical and where are the device + coordinates used. + */ -// This will select current objects out of the DC, -// which is what you have to do before deleting the -// DC. -void wxDC::SelectOldObjects(WXHDC dc) -{ -#if DEBUG > 1 - wxDebugMsg("wxDC::SelectOldObjects %X\n", this); +// logical to device +#define XLOG2DEV(x) (x) +#define YLOG2DEV(y) (y) + +// device to logical +#define XDEV2LOG(x) (x) +#define YDEV2LOG(y) (y) + +// --------------------------------------------------------------------------- +// private functions +// --------------------------------------------------------------------------- + +// convert degrees to radians +static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; } + +// call AlphaBlend() to blit contents of hdcSrc to hdcDst using alpha +// +// NB: bmpSrc is the bitmap selected in hdcSrc, it is not really needed +// to pass it to this function but as we already have it at the point +// of call anyhow we do +// +// return true if we could draw the bitmap in one way or the other, false +// otherwise +static bool AlphaBlt(HDC hdcDst, + int x, int y, int w, int h, + HDC hdcSrc, + const wxBitmap& bmpSrc); + +#ifdef wxHAVE_RAW_BITMAP +// our (limited) AlphaBlend() replacement +static void +wxAlphaBlend(HDC hdcDst, int x, int y, int w, int h, const wxBitmap& bmp); #endif - if (dc) - { - if (m_oldBitmap) + +// ---------------------------------------------------------------------------- +// private classes +// ---------------------------------------------------------------------------- + +// instead of duplicating the same code which sets and then restores text +// colours in each wxDC method working with wxSTIPPLE_MASK_OPAQUE brushes, +// encapsulate this in a small helper class + +// wxColourChanger: changes the text colours in the ctor if required and +// restores them in the dtor +class wxColourChanger +{ +public: + wxColourChanger(wxDC& dc); + ~wxColourChanger(); + +private: + wxDC& m_dc; + + COLORREF m_colFgOld, m_colBgOld; + + bool m_changed; + + DECLARE_NO_COPY_CLASS(wxColourChanger) +}; + +// this class saves the old stretch blit mode during its life time +class StretchBltModeChanger +{ +public: + StretchBltModeChanger(HDC hdc, int mode) + : m_hdc(hdc) { -#if DEBUG > 1 - wxDebugMsg("wxDC::SelectOldObjects: Selecting old HBITMAP %X\n", m_oldBitmap); +#ifndef __WXWINCE__ + m_modeOld = ::SetStretchBltMode(m_hdc, mode); + if ( !m_modeOld ) + wxLogLastError(_T("SetStretchBltMode")); #endif - ::SelectObject((HDC) dc, (HBITMAP) m_oldBitmap); - if (m_selectedBitmap.Ok()) - { - m_selectedBitmap.SetSelectedInto(NULL); - } } - m_oldBitmap = 0 ; - if (m_oldPen) + + ~StretchBltModeChanger() { -#if DEBUG > 1 - wxDebugMsg("wxDC::SelectOldObjects: Selecting old HPEN %X\n", m_oldPen); +#ifndef __WXWINCE__ + if ( !::SetStretchBltMode(m_hdc, m_modeOld) ) + wxLogLastError(_T("SetStretchBltMode")); #endif - ::SelectObject((HDC) dc, (HPEN) m_oldPen); } - m_oldPen = 0 ; - if (m_oldBrush) + +private: + const HDC m_hdc; + + int m_modeOld; + + DECLARE_NO_COPY_CLASS(StretchBltModeChanger) +}; + +// =========================================================================== +// implementation +// =========================================================================== + +// ---------------------------------------------------------------------------- +// wxColourChanger +// ---------------------------------------------------------------------------- + +wxColourChanger::wxColourChanger(wxDC& dc) : m_dc(dc) +{ + const wxBrush& brush = dc.GetBrush(); + if ( brush.Ok() && brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE ) { -#if DEBUG > 1 - wxDebugMsg("wxDC::SelectOldObjects: Selecting old HBRUSH %X\n", m_oldBrush); -#endif - ::SelectObject((HDC) dc, (HBRUSH) m_oldBrush); + HDC hdc = GetHdcOf(dc); + m_colFgOld = ::GetTextColor(hdc); + m_colBgOld = ::GetBkColor(hdc); + + // note that Windows convention is opposite to wxWindows one, this is + // why text colour becomes the background one and vice versa + const wxColour& colFg = dc.GetTextForeground(); + if ( colFg.Ok() ) + { + ::SetBkColor(hdc, colFg.GetPixel()); + } + + const wxColour& colBg = dc.GetTextBackground(); + if ( colBg.Ok() ) + { + ::SetTextColor(hdc, colBg.GetPixel()); + } + + SetBkMode(hdc, + dc.GetBackgroundMode() == wxTRANSPARENT ? TRANSPARENT + : OPAQUE); + + // flag which telsl us to undo changes in the dtor + m_changed = TRUE; } - m_oldBrush = 0 ; - if (m_oldFont) + else { -#if DEBUG > 1 - wxDebugMsg("wxDC::SelectOldObjects: Selecting old HFONT %X\n", m_oldFont); -#endif - ::SelectObject((HDC) dc, (HFONT) m_oldFont); + // nothing done, nothing to undo + m_changed = FALSE; } - m_oldFont = 0 ; - if (m_oldPalette) +} + +wxColourChanger::~wxColourChanger() +{ + if ( m_changed ) { -#if DEBUG > 1 - wxDebugMsg("wxDC::SelectOldObjects: Selecting old HPALETTE %X\n", m_oldPalette); -#endif - ::SelectPalette((HDC) dc, (HPALETTE) m_oldPalette, TRUE); - } -#if DEBUG > 1 - wxDebugMsg("wxDC::SelectOldObjects: Done.\n"); -#endif - m_oldPalette = 0 ; - } -/* - if (m_font.Ok()) - m_font.ReleaseResource(); - if (m_pen.Ok()) - m_pen.ReleaseResource(); - if (m_brush.Ok()) - m_brush.ReleaseResource(); - if (m_backgroundBrush.Ok()) - m_backgroundBrush.ReleaseResource(); -*/ + // restore the colours we changed + HDC hdc = GetHdcOf(m_dc); - m_brush = wxNullBrush ; - m_pen = wxNullPen; - m_palette = wxNullPalette; - m_font = wxNullFont; - m_backgroundBrush = wxNullBrush; - m_selectedBitmap = wxNullBitmap; + ::SetBkMode(hdc, TRANSPARENT); + ::SetTextColor(hdc, m_colFgOld); + ::SetBkColor(hdc, m_colBgOld); + } } -void wxDC::SetClippingRegion(long cx, long cy, long cw, long ch) -{ - m_clipping = TRUE; - m_clipX1 = (int)cx; - m_clipY1 = (int)cy; - m_clipX2 = (int)(cx + cw); - m_clipY2 = (int)(cy + ch); +// --------------------------------------------------------------------------- +// wxDC +// --------------------------------------------------------------------------- - BeginDrawing(); +// Default constructor +wxDC::wxDC() +{ + m_canvas = NULL; - DoClipping((WXHDC) m_hDC); + m_oldBitmap = 0; + m_oldPen = 0; + m_oldBrush = 0; + m_oldFont = 0; +#if wxUSE_PALETTE + m_oldPalette = 0; +#endif // wxUSE_PALETTE - EndDrawing(); + m_bOwnsDC = FALSE; + m_hDC = 0; } -void wxDC::DoClipping(WXHDC dc) +wxDC::~wxDC() { - if (m_clipping && dc) - { - IntersectClipRect((HDC) dc, XLOG2DEV(m_clipX1), YLOG2DEV(m_clipY1), - XLOG2DEV(m_clipX2), YLOG2DEV(m_clipY2)); -#if 0 - int x_off = 0; - int y_off = 0; - if (m_canvas) + if ( m_hDC != 0 ) { - m_canvas->CalcScrolledPosition(0, 0, &x_off, &y_off); + SelectOldObjects(m_hDC); + + // if we own the HDC, we delete it, otherwise we just release it + + if ( m_bOwnsDC ) + { + ::DeleteDC(GetHdc()); + } + else // we don't own our HDC + { + if (m_canvas) + { + ::ReleaseDC(GetHwndOf(m_canvas), GetHdc()); + } + else + { + // Must have been a wxScreenDC + ::ReleaseDC((HWND) NULL, GetHdc()); + } + } } -// HRGN rgn = CreateRectRgn(XLOG2DEV(m_clipX1 + x_off), YLOG2DEV(m_clipY1 + y_off), -// XLOG2DEV(m_clipX2 + x_off), YLOG2DEV(m_clipY2 + y_off)); - -// SelectClipRgn(dc, rgn); -// DeleteObject(rgn); - IntersectClipRect((HDC) dc, XLOG2DEV(m_clipX1 + x_off), YLOG2DEV(m_clipY1 + y_off), - XLOG2DEV(m_clipX2 + x_off), YLOG2DEV(m_clipY2 + y_off)); -#endif - } } -void wxDC::DestroyClippingRegion(void) +// This will select current objects out of the DC, +// which is what you have to do before deleting the +// DC. +void wxDC::SelectOldObjects(WXHDC dc) { - BeginDrawing(); - - if (m_clipping && m_hDC) - { -// SelectClipRgn(dc, NULL); - HRGN rgn = CreateRectRgn(0, 0, 32000, 32000); -#if DEBUG > 1 - wxDebugMsg("wxDC::DestroyClippingRegion: Selecting HRGN %X\n", rgn); -#endif - SelectClipRgn((HDC) m_hDC, rgn); -#if DEBUG > 1 - wxDebugMsg("wxDC::DestroyClippingRegion: Deleting HRGN %X\n", rgn); + if (dc) + { + if (m_oldBitmap) + { + ::SelectObject((HDC) dc, (HBITMAP) m_oldBitmap); +#ifdef __WXDEBUG__ + if (m_selectedBitmap.Ok()) + { + m_selectedBitmap.SetSelectedInto(NULL); + } #endif - DeleteObject(rgn); - } - m_clipping = FALSE; + } + m_oldBitmap = 0; + if (m_oldPen) + { + ::SelectObject((HDC) dc, (HPEN) m_oldPen); + } + m_oldPen = 0; + if (m_oldBrush) + { + ::SelectObject((HDC) dc, (HBRUSH) m_oldBrush); + } + m_oldBrush = 0; + if (m_oldFont) + { + ::SelectObject((HDC) dc, (HFONT) m_oldFont); + } + m_oldFont = 0; + +#if wxUSE_PALETTE + if (m_oldPalette) + { + ::SelectPalette((HDC) dc, (HPALETTE) m_oldPalette, FALSE); + } + m_oldPalette = 0; +#endif // wxUSE_PALETTE + } - EndDrawing(); + m_brush = wxNullBrush; + m_pen = wxNullPen; +#if wxUSE_PALETTE + m_palette = wxNullPalette; +#endif // wxUSE_PALETTE + m_font = wxNullFont; + m_backgroundBrush = wxNullBrush; + m_selectedBitmap = wxNullBitmap; } -bool wxDC::CanDrawBitmap(void) const +// --------------------------------------------------------------------------- +// clipping +// --------------------------------------------------------------------------- + +void wxDC::UpdateClipBox() { - return TRUE; +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif + + RECT rect; + ::GetClipBox(GetHdc(), &rect); + + m_clipX1 = (wxCoord) XDEV2LOG(rect.left); + m_clipY1 = (wxCoord) YDEV2LOG(rect.top); + m_clipX2 = (wxCoord) XDEV2LOG(rect.right); + m_clipY2 = (wxCoord) YDEV2LOG(rect.bottom); } -bool wxDC::CanGetTextExtent(void) const +// common part of DoSetClippingRegion() and DoSetClippingRegionAsRegion() +void wxDC::SetClippingHrgn(WXHRGN hrgn) { - // What sort of display is it? - int technology = ::GetDeviceCaps((HDC) m_hDC, TECHNOLOGY); + wxCHECK_RET( hrgn, wxT("invalid clipping region") ); - bool ok; +#ifdef __WXMICROWIN__ + if (!GetHdc()) return; +#endif // __WXMICROWIN__ - if (technology != DT_RASDISPLAY && technology != DT_RASPRINTER) - ok = FALSE; - else ok = TRUE; + // note that we combine the new clipping region with the existing one: this + // is compatible with what the other ports do and is the documented + // behaviour now (starting with 2.3.3) +#if defined(__WIN16__) || defined(__WXWINCE__) + RECT rectClip; + if ( !::GetClipBox(GetHdc(), &rectClip) ) + return; - return ok; -} + HRGN hrgnDest = ::CreateRectRgn(0, 0, 0, 0); + HRGN hrgnClipOld = ::CreateRectRgn(rectClip.left, rectClip.top, + rectClip.right, rectClip.bottom); -void wxDC::SetPalette(const wxPalette& palette) -{ - BeginDrawing(); + if ( ::CombineRgn(hrgnDest, hrgnClipOld, (HRGN)hrgn, RGN_AND) != ERROR ) + { + ::SelectClipRgn(GetHdc(), hrgnDest); + } + + ::DeleteObject(hrgnClipOld); + ::DeleteObject(hrgnDest); +#else // Win32 + if ( ::ExtSelectClipRgn(GetHdc(), (HRGN)hrgn, RGN_AND) == ERROR ) + { + wxLogLastError(_T("ExtSelectClipRgn")); + + return; + } +#endif // Win16/32 - m_palette = m_palette; + m_clipping = TRUE; - if (!m_palette.Ok()) - { - // Setting a NULL colourmap is a way of restoring - // the original colourmap - if (m_oldPalette) + UpdateClipBox(); +} + +void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h) +{ + // the region coords are always the device ones, so do the translation + // manually + // + // FIXME: possible +/-1 error here, to check! + HRGN hrgn = ::CreateRectRgn(LogicalToDeviceX(x), + LogicalToDeviceY(y), + LogicalToDeviceX(x + w), + LogicalToDeviceY(y + h)); + if ( !hrgn ) { - ::SelectPalette((HDC) m_hDC, (HPALETTE) m_oldPalette, TRUE); -#if DEBUG > 1 - wxDebugMsg("wxDC::SetPalette: set old palette %X\n", m_oldPalette); -#endif - m_oldPalette = 0; + wxLogLastError(_T("CreateRectRgn")); } + else + { + SetClippingHrgn((WXHRGN)hrgn); - return; - } - - if (m_palette.Ok() && m_palette.GetHPALETTE()) - { - HPALETTE oldPal = ::SelectPalette((HDC) m_hDC, (HPALETTE) m_palette.GetHPALETTE(), TRUE); - if (!m_oldPalette) - m_oldPalette = (WXHPALETTE) oldPal; + ::DeleteObject(hrgn); + } +} -#if DEBUG > 1 - wxDebugMsg("wxDC::SetPalette %X: selected palette %X\n", this, m_palette.GetHPALETTE()); - if (oldPal) - wxDebugMsg("wxDC::SetPalette: oldPal was palette %X\n", oldPal); - if (m_oldPalette) - wxDebugMsg("wxDC::SetPalette: m_oldPalette is palette %X\n", m_oldPalette); +void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region) +{ + SetClippingHrgn(region.GetHRGN()); +} + +void wxDC::DestroyClippingRegion() +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; #endif - ::RealizePalette((HDC) m_hDC); - } - EndDrawing(); + if (m_clipping && m_hDC) + { + // TODO: this should restore the previous clipping region, + // so that OnPaint processing works correctly, and the update + // clipping region doesn't get destroyed after the first + // DestroyClippingRegion. + HRGN rgn = CreateRectRgn(0, 0, 32000, 32000); + ::SelectClipRgn(GetHdc(), rgn); + ::DeleteObject(rgn); + } + + m_clipping = FALSE; } -void wxDC::Clear(void) +// --------------------------------------------------------------------------- +// query capabilities +// --------------------------------------------------------------------------- + +bool wxDC::CanDrawBitmap() const { - BeginDrawing(); + return TRUE; +} - RECT rect; - if (m_canvas) - GetClientRect((HWND) m_canvas->GetHWND(), &rect); - else if (m_selectedBitmap.Ok()) - { - rect.left = 0; rect.top = 0; - rect.right = m_selectedBitmap.GetWidth(); - rect.bottom = m_selectedBitmap.GetHeight(); - } - (void) ::SetMapMode((HDC) m_hDC, MM_TEXT); +bool wxDC::CanGetTextExtent() const +{ +#ifdef __WXMICROWIN__ + // TODO Extend MicroWindows' GetDeviceCaps function + return TRUE; +#else + // What sort of display is it? + int technology = ::GetDeviceCaps(GetHdc(), TECHNOLOGY); - DWORD colour = GetBkColor((HDC) m_hDC); - HBRUSH brush = CreateSolidBrush(colour); - FillRect((HDC) m_hDC, &rect, brush); - DeleteObject(brush); + return (technology == DT_RASDISPLAY) || (technology == DT_RASPRINTER); +#endif +} - ::SetMapMode((HDC) m_hDC, MM_ANISOTROPIC); - ::SetViewportExtEx((HDC) m_hDC, VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL); - ::SetWindowExtEx((HDC) m_hDC, m_windowExtX, m_windowExtY, NULL); - ::SetViewportOrgEx((HDC) m_hDC, (int)m_deviceOriginX, (int)m_deviceOriginY, NULL); - ::SetWindowOrgEx((HDC) m_hDC, (int)m_logicalOriginX, (int)m_logicalOriginY, NULL); +int wxDC::GetDepth() const +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return 16; +#endif - EndDrawing(); + return (int)::GetDeviceCaps(GetHdc(), BITSPIXEL); } -void wxDC::FloodFill(long x, long y, wxColour *col, int style) +// --------------------------------------------------------------------------- +// drawing +// --------------------------------------------------------------------------- + +void wxDC::Clear() { -// int xx = (int)x; -// int yy = (int)y; +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - if (m_brush.Ok() && m_autoSetting) - SetBrush(m_brush); + RECT rect; + if ( m_canvas ) + { + GetClientRect((HWND) m_canvas->GetHWND(), &rect); + } + else + { + // No, I think we should simply ignore this if printing on e.g. + // a printer DC. + // wxCHECK_RET( m_selectedBitmap.Ok(), wxT("this DC can't be cleared") ); + if (!m_selectedBitmap.Ok()) + return; + + rect.left = 0; rect.top = 0; + rect.right = m_selectedBitmap.GetWidth(); + rect.bottom = m_selectedBitmap.GetHeight(); + } -// if (m_canvas) -// m_canvas->CalcScrolledPosition((int)x, (int)y, &xx, &yy); +#ifndef __WXWINCE__ + (void) ::SetMapMode(GetHdc(), MM_TEXT); +#endif - BeginDrawing(); + DWORD colour = ::GetBkColor(GetHdc()); + HBRUSH brush = ::CreateSolidBrush(colour); + ::FillRect(GetHdc(), &rect, brush); + ::DeleteObject(brush); - (void)ExtFloodFill((HDC) m_hDC, XLOG2DEV(x), YLOG2DEV(y), - col->GetPixel(), - style==wxFLOOD_SURFACE? - FLOODFILLSURFACE:FLOODFILLBORDER - ); + int width = DeviceToLogicalXRel(VIEWPORT_EXTENT)*m_signX, + height = DeviceToLogicalYRel(VIEWPORT_EXTENT)*m_signY; - EndDrawing(); +#ifndef __WXWINCE__ + ::SetMapMode(GetHdc(), MM_ANISOTROPIC); - CalcBoundingBox(x, y); + ::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL); + ::SetWindowExtEx(GetHdc(), width, height, NULL); + ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL); + ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL); +#endif } -bool wxDC::GetPixel(long x, long y, wxColour *col) const +bool wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style) { - // added by steve 29.12.94 (copied from DrawPoint) - // returns TRUE for pixels in the color of the current pen - // and FALSE for all other pixels colors - // if col is non-NULL return the color of the pixel -/* - int xx1 = (int)x; - int yy1 = (int)y; - if (m_canvas) - m_canvas->CalcScrolledPosition((int)x, (int)y, &xx1, &yy1); -*/ - - // get the color of the pixel - COLORREF pixelcolor = ::GetPixel((HDC) m_hDC, XLOG2DEV(x), YLOG2DEV(y)); - // get the color of the pen - COLORREF pencolor = 0x00ffffff; - if (m_pen.Ok()) - { - pencolor = m_pen.GetColour().GetPixel() ; - } - - // return the color of the pixel - if(col) - col->Set(GetRValue(pixelcolor),GetGValue(pixelcolor),GetBValue(pixelcolor)); - - // check, if color of the pixels is the same as the color - // of the current pen - return(pixelcolor==pencolor); -} - -void wxDC::CrossHair(long x, long y) -{ - if (m_pen.Ok() && m_autoSetting) - SetPen(m_pen); - - // We suppose that our screen is 2000x2000 max. - long x1 = x-2000; - long y1 = y-2000; - long x2 = x+2000; - long y2 = y+2000; -/* - long xx1 = x1 ; - long yy1 = y1 ; - long xx2 = x2 ; - long yy2 = y2 ; - long xx = x ; - long yy = y ; +#ifdef __WXWINCE__ + return FALSE; +#else + +#ifdef __WXMICROWIN__ + if (!GetHDC()) return FALSE; +#endif - if (m_canvas) - { - m_canvas->CalcScrolledPosition(x1, y1, &xx1, &yy1); - m_canvas->CalcScrolledPosition(x2, y2, &xx2, &yy2); - m_canvas->CalcScrolledPosition(x, y, &xx, &yy); - } -*/ + bool success = (0 != ::ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), + col.GetPixel(), + style == wxFLOOD_SURFACE ? FLOODFILLSURFACE + : FLOODFILLBORDER) ) ; + if (!success) + { + // quoting from the MSDN docs: + // + // Following are some of the reasons this function might fail: + // + // * The filling could not be completed. + // * The specified point has the boundary color specified by the + // crColor parameter (if FLOODFILLBORDER was requested). + // * The specified point does not have the color specified by + // crColor (if FLOODFILLSURFACE was requested) + // * The point is outside the clipping region that is, it is not + // visible on the device. + // + wxLogLastError(wxT("ExtFloodFill")); + } + + CalcBoundingBox(x, y); + + return success; +#endif +} - BeginDrawing(); +bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return FALSE; +#endif - (void)MoveToEx((HDC) m_hDC, XLOG2DEV(x1), YLOG2DEV(y), NULL); - (void)LineTo((HDC) m_hDC, XLOG2DEV(x2), YLOG2DEV(y)); + wxCHECK_MSG( col, FALSE, _T("NULL colour parameter in wxDC::GetPixel") ); - (void)MoveToEx((HDC) m_hDC, XLOG2DEV(x), YLOG2DEV(y1), NULL); - (void)LineTo((HDC) m_hDC, XLOG2DEV(x), YLOG2DEV(y2)); + // get the color of the pixel + COLORREF pixelcolor = ::GetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)); - EndDrawing(); + wxRGBToColour(*col, pixelcolor); - CalcBoundingBox(x1, y1); - CalcBoundingBox(x2, y2); + return TRUE; } -void wxDC::DrawLine(long x1, long y1, long x2, long y2) +void wxDC::DoCrossHair(wxCoord x, wxCoord y) { -// BUGBUG - is this necessary? YES YES YES YEs Yes yes ye.... - if (m_pen.Ok() && m_autoSetting) - SetPen(m_pen); -/* - int xx1 = (int)x1; - int yy1 = (int)y1; - int xx2 = (int)x2; - int yy2 = (int)y2; - if (m_canvas) - { - m_canvas->CalcScrolledPosition((int)x1, (int)y1, &xx1, &yy1); - m_canvas->CalcScrolledPosition((int)x2, (int)y2, &xx2, &yy2); - } -*/ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - BeginDrawing(); + wxCoord x1 = x-VIEWPORT_EXTENT; + wxCoord y1 = y-VIEWPORT_EXTENT; + wxCoord x2 = x+VIEWPORT_EXTENT; + wxCoord y2 = y+VIEWPORT_EXTENT; - (void)MoveToEx((HDC) m_hDC, XLOG2DEV(x1), YLOG2DEV(y1), NULL); - (void)LineTo((HDC) m_hDC, XLOG2DEV(x2), YLOG2DEV(y2)); + wxDrawLine(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y)); + wxDrawLine(GetHdc(), XLOG2DEV(x), YLOG2DEV(y1), XLOG2DEV(x), YLOG2DEV(y2)); - /* MATTHEW: [6] New normalization */ -#if WX_STANDARD_GRAPHICS - (void)LineTo((HDC) m_hDC, XLOG2DEV(x2) + 1, YLOG2DEV(y2)); + CalcBoundingBox(x1, y1); + CalcBoundingBox(x2, y2); +} + +void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2) +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; #endif - EndDrawing(); + wxDrawLine(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y1), XLOG2DEV(x2), YLOG2DEV(y2)); - CalcBoundingBox(x1, y1); - CalcBoundingBox(x2, y2); + CalcBoundingBox(x1, y1); + CalcBoundingBox(x2, y2); } -void wxDC::DrawArc(long x1,long y1,long x2,long y2,double xc,double yc) +// Draws an arc of a circle, centred on (xc, yc), with starting point (x1, y1) +// and ending at (x2, y2) +void wxDC::DoDrawArc(wxCoord x1, wxCoord y1, + wxCoord x2, wxCoord y2, + wxCoord xc, wxCoord yc) { -/* - int xx1 = (int)x1; - int yy1 = (int)y1; - int xx2 = (int)x2; - int yy2 = (int)y2; - int xxc = (int)xc ; - int yyc = (int)yc; -*/ - - double dx = xc-x1 ; - double dy = yc-y1 ; - double radius = (double)sqrt(dx*dx+dy*dy) ;; - if (x1==x2 && x2==y2) - { - DrawEllipse(xc,yc,(double)(radius*2.0),(double)(radius*2)) ; - return ; - } - -// BUGBUG - is this necessary? - if (m_pen.Ok() && m_autoSetting) - SetPen(m_pen) ; +#ifdef __WXWINCE__ + // Slower emulation since WinCE doesn't support Pie and Arc + double r = sqrt( (x1-xc)*(x1-xc) + (y1-yc)*(y1-yc) ); + double sa = acos((x1-xc)/r)/M_PI*180; // between 0 and 180 + if( y1>yc ) sa = -sa; // below center + double ea = atan2(yc-y2, x2-xc)/M_PI*180; + DoDrawEllipticArcRot( xc-r, yc-r, 2*r, 2*r, sa, ea ); +#else -/* - if (m_canvas) - { - m_canvas->CalcScrolledPosition((int)x1, (int)y1, &xx1, &yy1); - m_canvas->CalcScrolledPosition((int)x2, (int)y2, &xx2, &yy2); - m_canvas->CalcScrolledPosition((int)xc, (int)yc, &xxc, &yyc); - } -*/ - - BeginDrawing(); - - long xx1 = XLOG2DEV(x1) ; - long yy1 = YLOG2DEV(y1) ; - long xx2 = XLOG2DEV(x2) ; - long yy2 = YLOG2DEV(y2) ; - long xxc = XLOG2DEV(xc) ; - long yyc = YLOG2DEV(yc) ; - long ray = (long) sqrt(double((xxc-xx1)*(xxc-xx1)+(yyc-yy1)*(yyc-yy1))) ; - - (void)MoveToEx((HDC) m_hDC, (int) xx1, (int) yy1, NULL); - long xxx1 = (long) (xxc-ray); - long yyy1 = (long) (yyc-ray); - long xxx2 = (long) (xxc+ray); - long yyy2 = (long) (yyc+ray); - if (m_brush.Ok() && m_brush.GetStyle() !=wxTRANSPARENT) - { -// BUGBUG - is this necessary? - if (m_brush.GetStyle()!=wxTRANSPARENT&&m_autoSetting) - SetBrush(m_brush) ; - Pie((HDC) m_hDC,xxx1,yyy1,xxx2,yyy2, - xx1,yy1,xx2,yy2) ; - } - else - Arc((HDC) m_hDC,xxx1,yyy1,xxx2,yyy2, - xx1,yy1,xx2,yy2) ; - - EndDrawing(); - - CalcBoundingBox((xc-radius), (yc-radius)); - CalcBoundingBox((xc+radius), (yc+radius)); -} - -void wxDC::DrawEllipticArc(long WXUNUSED(x),long WXUNUSED(y),long WXUNUSED(w),long WXUNUSED(h),double WXUNUSED(sa),double WXUNUSED(ea)) -{ - // Not implemented -} - -void wxDC::DrawPoint(long x, long y) -{ -// BUGBUG - is this necessary? - if (m_pen.Ok() && m_autoSetting) - SetPen(m_pen) ; +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif -/* - int xx1 = (int)x; - int yy1 = (int)y; - if (m_canvas) - m_canvas->CalcScrolledPosition((int)x, (int)y, &xx1, &yy1); -*/ + wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling - BeginDrawing(); + double dx = xc - x1; + double dy = yc - y1; + double radius = (double)sqrt(dx*dx+dy*dy); + wxCoord r = (wxCoord)radius; - COLORREF color = 0x00ffffff; - if (m_pen.Ok()) - { -// m_pen.RealizeResource(); - color = m_pen.GetColour().GetPixel() ; - } + // treat the special case of full circle separately + if ( x1 == x2 && y1 == y2 ) + { + DrawEllipse(xc - r, yc - r, 2*r, 2*r); + return; + } -/* - color = RGB(m_pen->GetColour().Red(), - m_pen->GetColour().Green(), - m_pen->GetColour().Blue()); -*/ + wxCoord xx1 = XLOG2DEV(x1); + wxCoord yy1 = YLOG2DEV(y1); + wxCoord xx2 = XLOG2DEV(x2); + wxCoord yy2 = YLOG2DEV(y2); + wxCoord xxc = XLOG2DEV(xc); + wxCoord yyc = YLOG2DEV(yc); + wxCoord ray = (wxCoord) sqrt(double((xxc-xx1)*(xxc-xx1)+(yyc-yy1)*(yyc-yy1))); - SetPixel((HDC) m_hDC, XLOG2DEV(x), YLOG2DEV(y), color); + wxCoord xxx1 = (wxCoord) (xxc-ray); + wxCoord yyy1 = (wxCoord) (yyc-ray); + wxCoord xxx2 = (wxCoord) (xxc+ray); + wxCoord yyy2 = (wxCoord) (yyc+ray); - EndDrawing(); + if ( m_brush.Ok() && m_brush.GetStyle() != wxTRANSPARENT ) + { + // Have to add 1 to bottom-right corner of rectangle + // to make semi-circles look right (crooked line otherwise). + // Unfortunately this is not a reliable method, depends + // on the size of shape. + // TODO: figure out why this happens! + Pie(GetHdc(),xxx1,yyy1,xxx2+1,yyy2+1, xx1,yy1,xx2,yy2); + } + else + { + Arc(GetHdc(),xxx1,yyy1,xxx2,yyy2, xx1,yy1,xx2,yy2); + } - CalcBoundingBox(x, y); + CalcBoundingBox(xc - r, yc - r); + CalcBoundingBox(xc + r, yc + r); +#endif } -void wxDC::DrawPolygon(int n, wxPoint points[], long xoffset, long yoffset,int fillStyle) +void wxDC::DoDrawCheckMark(wxCoord x1, wxCoord y1, + wxCoord width, wxCoord height) { -// BUGBUG - is this necessary? - if (m_pen.Ok() && m_autoSetting) - SetPen(m_pen) ; -/* - int xoffset1 = 0; - int yoffset1 = 0; +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - if (m_canvas) - m_canvas->CalcScrolledPosition(0, 0, &xoffset1, &yoffset1); + wxCoord x2 = x1 + width, + y2 = y1 + height; - xoffset1 += (int)xoffset; yoffset1 += (int)yoffset; -*/ +#if defined(__WIN32__) && !defined(__SYMANTEC__) && !defined(__WXMICROWIN__) + RECT rect; + rect.left = x1; + rect.top = y1; + rect.right = x2; + rect.bottom = y2; - BeginDrawing(); +#ifdef __WXWINCE__ + DrawFrameControl(GetHdc(), &rect, DFC_BUTTON, DFCS_BUTTONCHECK); +#else + DrawFrameControl(GetHdc(), &rect, DFC_MENU, DFCS_MENUCHECK); +#endif +#else // Win16 + // In WIN16, draw a cross + HPEN blackPen = ::CreatePen(PS_SOLID, 1, RGB(0, 0, 0)); + HPEN whiteBrush = (HPEN)::GetStockObject(WHITE_BRUSH); + HPEN hPenOld = (HPEN)::SelectObject(GetHdc(), blackPen); + HPEN hBrushOld = (HPEN)::SelectObject(GetHdc(), whiteBrush); + ::SetROP2(GetHdc(), R2_COPYPEN); + Rectangle(GetHdc(), x1, y1, x2, y2); + MoveToEx(GetHdc(), x1, y1, NULL); + LineTo(GetHdc(), x2, y2); + MoveToEx(GetHdc(), x2, y1, NULL); + LineTo(GetHdc(), x1, y2); + ::SelectObject(GetHdc(), hPenOld); + ::SelectObject(GetHdc(), hBrushOld); + ::DeleteObject(blackPen); +#endif // Win32/16 + + CalcBoundingBox(x1, y1); + CalcBoundingBox(x2, y2); +} + +void wxDC::DoDrawPoint(wxCoord x, wxCoord y) +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - POINT *cpoints = new POINT[n]; - int i; - for (i = 0; i < n; i++) - { - cpoints[i].x = (int)(XLOG2DEV(points[i].x)); - cpoints[i].y = (int)(YLOG2DEV(points[i].y)); + COLORREF color = 0x00ffffff; + if (m_pen.Ok()) + { + color = m_pen.GetColour().GetPixel(); + } - CalcBoundingBox(points[i].x, points[i].y); - } + SetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), color); - int prev = SetPolyFillMode((HDC) m_hDC,fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING) ; - (void)Polygon((HDC) m_hDC, cpoints, n); - SetPolyFillMode((HDC) m_hDC,prev) ; + CalcBoundingBox(x, y); +} - EndDrawing(); +void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle) +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif + + wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling + + // Do things less efficiently if we have offsets + if (xoffset != 0 || yoffset != 0) + { + POINT *cpoints = new POINT[n]; + int i; + for (i = 0; i < n; i++) + { + cpoints[i].x = (int)(points[i].x + xoffset); + cpoints[i].y = (int)(points[i].y + yoffset); + + CalcBoundingBox(cpoints[i].x, cpoints[i].y); + } +#ifndef __WXWINCE__ + int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING); +#endif + (void)Polygon(GetHdc(), cpoints, n); +#ifndef __WXWINCE__ + SetPolyFillMode(GetHdc(),prev); +#endif + delete[] cpoints; + } + else + { + int i; + for (i = 0; i < n; i++) + CalcBoundingBox(points[i].x, points[i].y); - delete[] cpoints; +#ifndef __WXWINCE__ + int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING); +#endif + (void)Polygon(GetHdc(), (POINT*) points, n); +#ifndef __WXWINCE__ + SetPolyFillMode(GetHdc(),prev); +#endif + } } -void wxDC::DrawLines(int n, wxPoint points[], long xoffset, long yoffset) +void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset) { -// BUGBUG - is this necessary? - if (m_pen.Ok() && m_autoSetting) - SetPen(m_pen) ; +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif -/* - int xoffset1 = 0; - int yoffset1 = 0; + // Do things less efficiently if we have offsets + if (xoffset != 0 || yoffset != 0) + { + POINT *cpoints = new POINT[n]; + int i; + for (i = 0; i < n; i++) + { + cpoints[i].x = (int)(points[i].x + xoffset); + cpoints[i].y = (int)(points[i].y + yoffset); + + CalcBoundingBox(cpoints[i].x, cpoints[i].y); + } + (void)Polyline(GetHdc(), cpoints, n); + delete[] cpoints; + } + else + { + int i; + for (i = 0; i < n; i++) + CalcBoundingBox(points[i].x, points[i].y); - if (m_canvas) - { - m_canvas->CalcScrolledPosition(0, 0, &xoffset1, &yoffset1); - } - xoffset1 += (int)xoffset; yoffset1 += (int)yoffset; -*/ + (void)Polyline(GetHdc(), (POINT*) points, n); + } +} - BeginDrawing(); +void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height) +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - POINT *cpoints = new POINT[n]; - int i; - for (i = 0; i < n; i++) - { - cpoints[i].x = (int)(XLOG2DEV(points[i].x)); - cpoints[i].y = (int)(YLOG2DEV(points[i].y)); + wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling - CalcBoundingBox(points[i].x, points[i].y); - } + wxCoord x2 = x + width; + wxCoord y2 = y + height; - (void)Polyline((HDC) m_hDC, cpoints, n); + if ((m_logicalFunction == wxCOPY) && (m_pen.GetStyle() == wxTRANSPARENT)) + { + RECT rect; + rect.left = XLOG2DEV(x); + rect.top = YLOG2DEV(y); + rect.right = XLOG2DEV(x2); + rect.bottom = YLOG2DEV(y2); + (void)FillRect(GetHdc(), &rect, (HBRUSH)m_brush.GetResourceHandle() ); + } + else + { + // Windows draws the filled rectangles without outline (i.e. drawn with a + // transparent pen) one pixel smaller in both directions and we want them + // to have the same size regardless of which pen is used - adjust + + // I wonder if this shouldn´t be done after the LOG2DEV() conversions. RR. + if ( m_pen.GetStyle() == wxTRANSPARENT ) + { + x2++; + y2++; + } + + (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2)); + } - EndDrawing(); - delete[] cpoints; + CalcBoundingBox(x, y); + CalcBoundingBox(x2, y2); } -void wxDC::DrawRectangle(long x, long y, long width, long height) +void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius) { -// BUGBUG - is this necessary? - if (m_pen.Ok() && m_autoSetting) - SetPen(m_pen) ; +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif -/* - int x1 = (int)x; - int y1 = (int)y; - int x2 = (int)(x+width); - int y2 = (int)(y+height); + wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling - if (m_canvas) - { - m_canvas->CalcScrolledPosition((int)x, (int)y, &x1, &y1); - m_canvas->CalcScrolledPosition((int)(x+width), (int)(y+height), &x2, &y2); - } -*/ - long x2 = x + width; - long y2 = y + height; + // Now, a negative radius value is interpreted to mean + // 'the proportion of the smallest X or Y dimension' - BeginDrawing(); + if (radius < 0.0) + { + double smallest = 0.0; + if (width < height) + smallest = width; + else + smallest = height; + radius = (- radius * smallest); + } -/* MATTHEW: [6] new normalization */ -#if WX_STANDARD_GRAPHICS - bool do_brush, do_pen; + wxCoord x2 = (x+width); + wxCoord y2 = (y+height); - do_brush = m_brush.Ok() && m_brush.GetStyle() != wxTRANSPARENT; - do_pen = m_pen.Ok() && m_pen.GetStyle() != wxTRANSPARENT; + // Windows draws the filled rectangles without outline (i.e. drawn with a + // transparent pen) one pixel smaller in both directions and we want them + // to have the same size regardless of which pen is used - adjust + if ( m_pen.GetStyle() == wxTRANSPARENT ) + { + x2++; + y2++; + } - if (do_brush) { - HPEN orig_pen = NULL; + (void)RoundRect(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), + YLOG2DEV(y2), (int) (2*XLOG2DEV(radius)), (int)( 2*YLOG2DEV(radius))); - if (do_pen || !m_pen.Ok()) - orig_pen = ::SelectObject((HDC) m_hDC, ::GetStockObject(NULL_PEN)); + CalcBoundingBox(x, y); + CalcBoundingBox(x2, y2); +} - (void)Rectangle((HDC) m_hDC, XLOG2DEV(x), YLOG2DEV(y), - XLOG2DEV(x2) + 1, YLOG2DEV(y2) + 1); +void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height) +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif + + wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling - if (do_pen || !m_pen.Ok()) - ::SelectObject((HDC) m_hDC , orig_pen); - } - if (do_pen) { - HBRUSH orig_brush = NULL; + wxCoord x2 = (x+width); + wxCoord y2 = (y+height); - if (do_brush || !m_brush.Ok()) - orig_brush = ::SelectObject((HDC) m_hDC, ::GetStockObject(NULL_BRUSH)); + (void)Ellipse(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2)); - (void)Rectangle((HDC) m_hDC, XLOG2DEV(x), YLOG2DEV(y), - XLOG2DEV(x2), YLOG2DEV(y2)); + CalcBoundingBox(x, y); + CalcBoundingBox(x2, y2); +} - if (do_brush || !m_brush.Ok()) - ::SelectObject((HDC) m_hDC, orig_brush); - } +// Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows +void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea) +{ +#ifdef __WXWINCE__ + DoDrawEllipticArcRot( x, y, w, h, sa, ea ); #else - (void)Rectangle((HDC) m_hDC, XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2)); + +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; #endif - CalcBoundingBox(x, y); - CalcBoundingBox(x2, y2); + wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling - EndDrawing(); -} + wxCoord x2 = x + w; + wxCoord y2 = y + h; -void wxDC::DrawRoundedRectangle(long x, long y, long width, long height, double radius) -{ -// BUGBUG - is this necessary? - if (m_pen.Ok() && m_autoSetting) - SetPen(m_pen) ; + int rx1 = XLOG2DEV(x+w/2); + int ry1 = YLOG2DEV(y+h/2); + int rx2 = rx1; + int ry2 = ry1; - // Now, a negative radius value is interpreted to mean - // 'the proportion of the smallest X or Y dimension' + sa = DegToRad(sa); + ea = DegToRad(ea); - if (radius < 0.0) - { - double smallest = 0.0; - if (width < height) - smallest = width; + rx1 += (int)(100.0 * abs(w) * cos(sa)); + ry1 -= (int)(100.0 * abs(h) * m_signY * sin(sa)); + rx2 += (int)(100.0 * abs(w) * cos(ea)); + ry2 -= (int)(100.0 * abs(h) * m_signY * sin(ea)); + + // draw pie with NULL_PEN first and then outline otherwise a line is + // drawn from the start and end points to the centre + HPEN hpenOld = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN)); + if (m_signY > 0) + { + (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2)+1, YLOG2DEV(y2)+1, + rx1, ry1, rx2, ry2); + } else - smallest = height; - radius = (- radius * smallest); - } + { + (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)-1, XLOG2DEV(x2)+1, YLOG2DEV(y2), + rx1, ry1-1, rx2, ry2-1); + } -/* - int x1 = (int)x; - int y1 = (int)y; + ::SelectObject(GetHdc(), hpenOld); - if (m_canvas) - { - m_canvas->CalcScrolledPosition((int)x, (int)y, &x1, &y1); - m_canvas->CalcScrolledPosition((int)(x+width), (int)(y+height), &x2, &y2); - } -*/ + (void)Arc(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2), + rx1, ry1, rx2, ry2); - long x2 = (x+width); - long y2 = (y+height); + CalcBoundingBox(x, y); + CalcBoundingBox(x2, y2); +#endif +} - BeginDrawing(); +void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y) +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - (void)RoundRect((HDC) m_hDC, XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), - YLOG2DEV(y2), 2*XLOG2DEV(radius), 2*YLOG2DEV(radius)); + wxCHECK_RET( icon.Ok(), wxT("invalid icon in DrawIcon") ); - CalcBoundingBox(x, y); - CalcBoundingBox(x2, y2); +#ifdef __WIN32__ + ::DrawIconEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), GetHiconOf(icon), icon.GetWidth(), icon.GetHeight(), 0, NULL, DI_NORMAL); +#else + ::DrawIcon(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), GetHiconOf(icon)); +#endif - EndDrawing(); + CalcBoundingBox(x, y); + CalcBoundingBox(x + icon.GetWidth(), y + icon.GetHeight()); } -void wxDC::DrawEllipse(long x, long y, long width, long height) +void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask ) { -// BUGBUG - is this necessary? - if (m_pen.Ok() && m_autoSetting) - SetPen(m_pen) ; +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif -/* - int x1 = (int)x; - int y1 = (int)y; + wxCHECK_RET( bmp.Ok(), _T("invalid bitmap in wxDC::DrawBitmap") ); - if (m_canvas) - { - m_canvas->CalcScrolledPosition((int)x, (int)y, &x1, &y1); - m_canvas->CalcScrolledPosition((int)(x+width), (int)(y+height), &x2, &y2); - } -*/ + int width = bmp.GetWidth(), + height = bmp.GetHeight(); - long x2 = (x+width); - long y2 = (y+height); + HBITMAP hbmpMask = 0; - BeginDrawing(); +#if wxUSE_PALETTE + HPALETTE oldPal = 0; +#endif // wxUSE_PALETTE - (void)Ellipse((HDC) m_hDC, XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2)); + if ( bmp.HasAlpha() ) + { + MemoryHDC hdcMem; + SelectInHDC select(hdcMem, GetHbitmapOf(bmp)); - EndDrawing(); + if ( AlphaBlt(GetHdc(), x, y, width, height, hdcMem, bmp) ) + return; + } - CalcBoundingBox(x, y); - CalcBoundingBox(x2, y2); + if ( useMask ) + { + wxMask *mask = bmp.GetMask(); + if ( mask ) + hbmpMask = (HBITMAP)mask->GetMaskBitmap(); + + if ( !hbmpMask ) + { + // don't give assert here because this would break existing + // programs - just silently ignore useMask parameter + useMask = FALSE; + } + } + if ( useMask ) + { +#ifdef __WIN32__ + // use MaskBlt() with ROP which doesn't do anything to dst in the mask + // points + // On some systems, MaskBlt succeeds yet is much much slower + // than the wxWindows fall-back implementation. So we need + // to be able to switch this on and off at runtime. + bool ok = FALSE; +#if wxUSE_SYSTEM_OPTIONS + if (wxSystemOptions::GetOptionInt(wxT("no-maskblt")) == 0) +#endif + { + HDC cdc = GetHdc(); + HDC hdcMem = ::CreateCompatibleDC(GetHdc()); + HGDIOBJ hOldBitmap = ::SelectObject(hdcMem, GetHbitmapOf(bmp)); +#if wxUSE_PALETTE + wxPalette *pal = bmp.GetPalette(); + if ( pal && ::GetDeviceCaps(cdc,BITSPIXEL) <= 8 ) + { + oldPal = ::SelectPalette(hdcMem, GetHpaletteOf(*pal), FALSE); + ::RealizePalette(hdcMem); + } +#endif // wxUSE_PALETTE + + ok = ::MaskBlt(cdc, x, y, width, height, + hdcMem, 0, 0, + hbmpMask, 0, 0, + MAKEROP4(SRCCOPY, DSTCOPY)) != 0; + +#if wxUSE_PALETTE + if (oldPal) + ::SelectPalette(hdcMem, oldPal, FALSE); +#endif // wxUSE_PALETTE + + ::SelectObject(hdcMem, hOldBitmap); + ::DeleteDC(hdcMem); + } + + if ( !ok ) +#endif // Win32 + { + // Rather than reproduce wxDC::Blit, let's do it at the wxWin API + // level + wxMemoryDC memDC; + memDC.SelectObject(bmp); + + Blit(x, y, width, height, &memDC, 0, 0, wxCOPY, useMask); + + memDC.SelectObject(wxNullBitmap); + } + } + else // no mask, just use BitBlt() + { + HDC cdc = GetHdc(); + HDC memdc = ::CreateCompatibleDC( cdc ); + HBITMAP hbitmap = (HBITMAP) bmp.GetHBITMAP( ); + + wxASSERT_MSG( hbitmap, wxT("bitmap is ok but HBITMAP is NULL?") ); + + COLORREF old_textground = ::GetTextColor(GetHdc()); + COLORREF old_background = ::GetBkColor(GetHdc()); + if (m_textForegroundColour.Ok()) + { + ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() ); + } + if (m_textBackgroundColour.Ok()) + { + ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() ); + } + +#if wxUSE_PALETTE + wxPalette *pal = bmp.GetPalette(); + if ( pal && ::GetDeviceCaps(cdc,BITSPIXEL) <= 8 ) + { + oldPal = ::SelectPalette(memdc, GetHpaletteOf(*pal), FALSE); + ::RealizePalette(memdc); + } +#endif // wxUSE_PALETTE + + HGDIOBJ hOldBitmap = ::SelectObject( memdc, hbitmap ); + ::BitBlt( cdc, x, y, width, height, memdc, 0, 0, SRCCOPY); + +#if wxUSE_PALETTE + if (oldPal) + ::SelectPalette(memdc, oldPal, FALSE); +#endif // wxUSE_PALETTE + + ::SelectObject( memdc, hOldBitmap ); + ::DeleteDC( memdc ); + + ::SetTextColor(GetHdc(), old_textground); + ::SetBkColor(GetHdc(), old_background); + } } -void wxDC::DrawIcon(const wxIcon& icon, long x, long y) +void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y) { -/* - int x1 = (int)x; - int y1 = (int)y; - - if (m_canvas) - m_canvas->CalcScrolledPosition(int)x, (int)y, &x1, &y1); -*/ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - BeginDrawing(); + DrawAnyText(text, x, y); - ::DrawIcon((HDC) m_hDC, XLOG2DEV(x), YLOG2DEV(y), (HICON) icon.GetHICON()); - CalcBoundingBox(x, y); - CalcBoundingBox(x+icon.GetWidth(), y+icon.GetHeight()); + // update the bounding box + CalcBoundingBox(x, y); - EndDrawing(); + wxCoord w, h; + GetTextExtent(text, &w, &h); + CalcBoundingBox(x + w, y + h); } -void wxDC::SetFont(const wxFont& the_font) +void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y) { - // Release the current font from servitude (decrements the usage count) -// if (m_font.Ok()) -// m_font.ReleaseResource(); +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - BeginDrawing(); + // prepare for drawing the text + if ( m_textForegroundColour.Ok() ) + SetTextColor(GetHdc(), m_textForegroundColour.GetPixel()); - m_font = the_font; + DWORD old_background = 0; + if ( m_textBackgroundColour.Ok() ) + { + old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() ); + } - if (!the_font.Ok()) - { - if (m_oldFont) - ::SelectObject((HDC) m_hDC, (HFONT) m_oldFont); - m_oldFont = 0 ; - } + SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT + : OPAQUE); - if (m_font.Ok() && m_font.GetResourceHandle()) - { -#if DEBUG > 1 - wxDebugMsg("wxDC::SetFont: Selecting HFONT %X\n", m_font.GetResourceHandle()); +#ifdef __WXWINCE__ + if ( ::ExtTextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), 0, NULL, + text.c_str(), text.length(), NULL) == 0 ) + { + wxLogLastError(wxT("TextOut")); + } +#else + if ( ::TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), + text.c_str(), text.length()) == 0 ) + { + wxLogLastError(wxT("TextOut")); + } #endif - HFONT f = (HFONT) ::SelectObject((HDC) m_hDC, (HFONT) m_font.GetResourceHandle()); - if (!m_oldFont) - m_oldFont = (WXHFONT) f; - } - EndDrawing(); -} - -void wxDC::SetPen(const wxPen& pen) -{ - BeginDrawing(); -// if (m_pen.Ok()) -// m_pen.ReleaseResource(); + // restore the old parameters (text foreground colour may be left because + // it never is set to anything else, but background should remain + // transparent even if we just drew an opaque string) + if ( m_textBackgroundColour.Ok() ) + (void)SetBkColor(GetHdc(), old_background); - m_pen = pen; + SetBkMode(GetHdc(), TRANSPARENT); +} - if (!m_pen.Ok()) - { - if (m_oldPen) - ::SelectObject((HDC) m_hDC, (HPEN) m_oldPen); - m_oldPen = 0 ; - } +void wxDC::DoDrawRotatedText(const wxString& text, + wxCoord x, wxCoord y, + double angle) +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - if (m_pen.Ok()) - { -// m_pen.UseResource(); -// m_pen.RealizeResource(); - if (m_pen.GetResourceHandle()) + // we test that we have some font because otherwise we should still use the + // "else" part below to avoid that DrawRotatedText(angle = 180) and + // DrawRotatedText(angle = 0) use different fonts (we can't use the default + // font for drawing rotated fonts unfortunately) + if ( (angle == 0.0) && m_font.Ok() ) { - HPEN p = (HPEN) ::SelectObject((HDC) m_hDC, (HPEN)m_pen.GetResourceHandle()) ; - if (!m_oldPen) - m_oldPen = (WXHPEN) p; + DoDrawText(text, x, y); } - } - - EndDrawing(); +#ifndef __WXMICROWIN__ + else + { + // NB: don't take DEFAULT_GUI_FONT (a.k.a. wxSYS_DEFAULT_GUI_FONT) + // because it's not TrueType and so can't have non zero + // orientation/escapement under Win9x + wxFont font = m_font.Ok() ? m_font : *wxSWISS_FONT; + HFONT hfont = (HFONT)font.GetResourceHandle(); + LOGFONT lf; + if ( ::GetObject(hfont, sizeof(lf), &lf) == 0 ) + { + wxLogLastError(wxT("GetObject(hfont)")); + } + + // GDI wants the angle in tenth of degree + long angle10 = (long)(angle * 10); + lf.lfEscapement = angle10; + lf. lfOrientation = angle10; + + hfont = ::CreateFontIndirect(&lf); + if ( !hfont ) + { + wxLogLastError(wxT("CreateFont")); + } + else + { + HFONT hfontOld = (HFONT)::SelectObject(GetHdc(), hfont); + + DrawAnyText(text, x, y); + + (void)::SelectObject(GetHdc(), hfontOld); + (void)::DeleteObject(hfont); + } + + // call the bounding box by adding all four vertices of the rectangle + // containing the text to it (simpler and probably not slower than + // determining which of them is really topmost/leftmost/...) + wxCoord w, h; + GetTextExtent(text, &w, &h); + + double rad = DegToRad(angle); + + // "upper left" and "upper right" + CalcBoundingBox(x, y); + CalcBoundingBox(x + wxCoord(w*cos(rad)), y - wxCoord(h*sin(rad))); + + // "bottom left" and "bottom right" + x += (wxCoord)(h*sin(rad)); + y += (wxCoord)(h*cos(rad)); + CalcBoundingBox(x, y); + CalcBoundingBox(x + wxCoord(h*sin(rad)), y + wxCoord(h*cos(rad))); + } +#endif } -void wxDC::SetBrush(const wxBrush& brush) -{ - BeginDrawing(); - -// if (m_brush.Ok()) -// m_brush.ReleaseResource(); +// --------------------------------------------------------------------------- +// set GDI objects +// --------------------------------------------------------------------------- - m_brush = brush; +#if wxUSE_PALETTE - if (!m_brush.Ok()) - { - if (m_oldBrush) - ::SelectObject((HDC) m_hDC, (HBRUSH) m_oldBrush); - m_oldBrush = 0 ; - } +void wxDC::DoSelectPalette(bool realize) +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - if (m_brush.Ok()) - { -// m_brush.UseResource(); -// m_brush.RealizeResource(); + // Set the old object temporarily, in case the assignment deletes an object + // that's not yet selected out. + if (m_oldPalette) + { + ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, FALSE); + m_oldPalette = 0; + } - if (m_brush.GetResourceHandle()) + if ( m_palette.Ok() ) { - HBRUSH b = 0; - b = ::SelectObject((HDC) m_hDC, (HBRUSH)m_brush.GetResourceHandle()) ; - if (!m_oldBrush) - m_oldBrush = (WXHBRUSH) b; + HPALETTE oldPal = ::SelectPalette(GetHdc(), + GetHpaletteOf(m_palette), + FALSE); + if (!m_oldPalette) + m_oldPalette = (WXHPALETTE) oldPal; + + if (realize) + ::RealizePalette(GetHdc()); } - } - EndDrawing(); } -void wxDC::DrawText(const wxString& text, long x, long y, bool use16bit) +void wxDC::SetPalette(const wxPalette& palette) { -/* - int xx1 = (int)x; - int yy1 = (int)y; + if ( palette.Ok() ) + { + m_palette = palette; + DoSelectPalette(TRUE); + } +} - if (m_canvas) - m_canvas->CalcScrolledPosition((int)x, (int)y, &xx1, &yy1); -*/ +void wxDC::InitializePalette() +{ + if ( wxDisplayDepth() <= 8 ) + { + // look for any window or parent that has a custom palette. If any has + // one then we need to use it in drawing operations + wxWindow *win = m_canvas->GetAncestorWithCustomPalette(); + + m_hasCustomPalette = win && win->HasCustomPalette(); + if ( m_hasCustomPalette ) + { + m_palette = win->GetPalette(); + + // turn on MSW translation for this palette + DoSelectPalette(); + } + } +} - BeginDrawing(); +#endif // wxUSE_PALETTE - if (m_font.Ok() && m_font.GetResourceHandle()) - { -#if DEBUG > 1 - wxDebugMsg("wxDC::DrawText: Selecting HFONT %X\n", m_font.GetResourceHandle()); +void wxDC::SetFont(const wxFont& the_font) +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; #endif - HFONT f = ::SelectObject((HDC) m_hDC, (HFONT) m_font.GetResourceHandle()); - if (!m_oldFont) - m_oldFont = (WXHFONT) f; - } - if (m_textForegroundColour.Ok()) - SetTextColor((HDC) m_hDC, m_textForegroundColour.GetPixel() ) ; + // Set the old object temporarily, in case the assignment deletes an object + // that's not yet selected out. + if (m_oldFont) + { + ::SelectObject(GetHdc(), (HFONT) m_oldFont); + m_oldFont = 0; + } + + m_font = the_font; - DWORD old_background; - if (m_textBackgroundColour.Ok()) - { - old_background = SetBkColor((HDC) m_hDC, m_textBackgroundColour.GetPixel() ) ; - } + if (!the_font.Ok()) + { + if (m_oldFont) + ::SelectObject(GetHdc(), (HFONT) m_oldFont); + m_oldFont = 0; + } - if (m_backgroundMode == wxTRANSPARENT) - SetBkMode((HDC) m_hDC, TRANSPARENT); - else - SetBkMode((HDC) m_hDC, OPAQUE); + if (m_font.Ok() && m_font.GetResourceHandle()) + { + HFONT f = (HFONT) ::SelectObject(GetHdc(), (HFONT) m_font.GetResourceHandle()); + if (f == (HFONT) NULL) + { + wxLogDebug(wxT("::SelectObject failed in wxDC::SetFont.")); + } + if (!m_oldFont) + m_oldFont = (WXHFONT) f; + } +} - (void)TextOut((HDC) m_hDC, XLOG2DEV(x), YLOG2DEV(y), (char *) (const char *)text, strlen((const char *)text)); +void wxDC::SetPen(const wxPen& pen) +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - if (m_textBackgroundColour.Ok()) - (void)SetBkColor((HDC) m_hDC, old_background); + // Set the old object temporarily, in case the assignment deletes an object + // that's not yet selected out. + if (m_oldPen) + { + ::SelectObject(GetHdc(), (HPEN) m_oldPen); + m_oldPen = 0; + } - CalcBoundingBox(x, y); + m_pen = pen; - long w, h; - GetTextExtent(text, &w, &h); - CalcBoundingBox((x + w), (y + h)); + if (!m_pen.Ok()) + { + if (m_oldPen) + ::SelectObject(GetHdc(), (HPEN) m_oldPen); + m_oldPen = 0; + } - EndDrawing(); + if (m_pen.Ok()) + { + if (m_pen.GetResourceHandle()) + { + HPEN p = (HPEN) ::SelectObject(GetHdc(), (HPEN)m_pen.GetResourceHandle()); + if (!m_oldPen) + m_oldPen = (WXHPEN) p; + } + } } -void wxDC::SetBackground(const wxBrush& brush) +void wxDC::SetBrush(const wxBrush& brush) { -// if (m_backgroundBrush.Ok()) -// m_backgroundBrush.ReleaseResource(); +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - m_backgroundBrush = brush; + // Set the old object temporarily, in case the assignment deletes an object + // that's not yet selected out. + if (m_oldBrush) + { + ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush); + m_oldBrush = 0; + } - if (!m_backgroundBrush.Ok()) - return; + m_brush = brush; -// m_backgroundBrush.UseResource(); -// m_backgroundBrush.RealizeResource() ; + if (!m_brush.Ok()) + { + if (m_oldBrush) + ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush); + m_oldBrush = 0; + } - if (m_canvas) - { - bool customColours = TRUE; - // If we haven't specified wxUSER_COLOURS, don't allow the panel/dialog box to - // change background colours from the control-panel specified colours. - if (m_canvas->IsKindOf(CLASSINFO(wxWindow)) && ((m_canvas->GetWindowStyleFlag() & wxUSER_COLOURS) != wxUSER_COLOURS)) - customColours = FALSE; - - if (customColours) + if (m_brush.Ok()) { -// HBRUSH br = (m_backgroundBrush.GetStyle()==wxTRANSPARENT) ? -// GetStockObject(NULL_BRUSH) : (HBRUSH) m_backgroundBrush.GetResourceHandle(); - if (m_backgroundBrush.GetStyle()==wxTRANSPARENT) - { - m_canvas->m_backgroundTransparent = TRUE; - } - else - { - m_canvas->SetBackgroundColour(m_backgroundBrush.GetColour()); - m_canvas->m_backgroundTransparent = FALSE; - } + // to make sure the brush is alligned with the logical coordinates + wxBitmap *stipple = m_brush.GetStipple(); + if ( stipple && stipple->Ok() ) + { +#ifdef __WIN32__ + ::SetBrushOrgEx(GetHdc(), + m_deviceOriginX % stipple->GetWidth(), + m_deviceOriginY % stipple->GetHeight(), + NULL); // don't need previous brush origin +#else + ::SetBrushOrg(GetHdc(), + m_deviceOriginX % stipple->GetWidth(), + m_deviceOriginY % stipple->GetHeight()); +#endif + } + + if ( m_brush.GetResourceHandle() ) + { + HBRUSH b = 0; + b = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH)m_brush.GetResourceHandle()); + if (!m_oldBrush) + m_oldBrush = (WXHBRUSH) b; + } } - } - BeginDrawing(); +} - COLORREF new_color = m_backgroundBrush.GetColour().GetPixel() ; - { - (void)SetBkColor((HDC) m_hDC, new_color); - } +void wxDC::SetBackground(const wxBrush& brush) +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - EndDrawing(); + m_backgroundBrush = brush; + + if ( m_backgroundBrush.Ok() ) + { + (void)SetBkColor(GetHdc(), m_backgroundBrush.GetColour().GetPixel()); + } } void wxDC::SetBackgroundMode(int mode) { - m_backgroundMode = mode; - - BeginDrawing(); +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - if (m_backgroundMode == wxTRANSPARENT) - ::SetBkMode((HDC) m_hDC, TRANSPARENT); - else - ::SetBkMode((HDC) m_hDC, OPAQUE); + m_backgroundMode = mode; - EndDrawing(); + // SetBackgroundColour now only refers to text background + // and m_backgroundMode is used there } void wxDC::SetLogicalFunction(int function) { - m_logicalFunction = function; - - BeginDrawing(); +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - SetRop((WXHDC) m_hDC); + m_logicalFunction = function; - EndDrawing(); + SetRop(m_hDC); } void wxDC::SetRop(WXHDC dc) { - if (!dc || m_logicalFunction < 0) - return; - - int c_rop; - // These may be wrong - switch (m_logicalFunction) - { -// case wxXOR: c_rop = R2_XORPEN; break; - case wxXOR: c_rop = R2_NOTXORPEN; break; - case wxINVERT: c_rop = R2_NOT; break; - case wxOR_REVERSE: c_rop = R2_MERGEPENNOT; break; - case wxAND_REVERSE: c_rop = R2_MASKPENNOT; break; - case wxCLEAR: c_rop = R2_WHITE; break; - case wxSET: c_rop = R2_BLACK; break; - case wxSRC_INVERT: c_rop = R2_NOTCOPYPEN; break; - case wxOR_INVERT: c_rop = R2_MERGENOTPEN; break; - case wxAND: c_rop = R2_MASKPEN; break; - case wxOR: c_rop = R2_MERGEPEN; break; - case wxAND_INVERT: c_rop = R2_MASKNOTPEN; break; - case wxEQUIV: - case wxNAND: - case wxCOPY: - default: - c_rop = R2_COPYPEN; break; - } - SetROP2((HDC) dc, c_rop); -} - -bool wxDC::StartDoc(const wxString& message) -{ - if (!this->IsKindOf(CLASSINFO(wxPrinterDC))) - return TRUE; - - bool flag = FALSE; - - DOCINFO docinfo; - docinfo.cbSize = sizeof(DOCINFO); - docinfo.lpszDocName = (const char *)message; - docinfo.lpszOutput = (const char *)m_filename; -#if defined(__WIN95__) - docinfo.lpszDatatype = NULL; - docinfo.fwType = 0; -#endif + if ( !dc || m_logicalFunction < 0 ) + return; - if (m_hDC) flag = (SP_ERROR != -#ifndef __WIN32__ - ::StartDoc((HDC) m_hDC, &docinfo)); -#else -#ifdef UNICODE - ::StartDocW((HDC) m_hDC, &docinfo)); -#else - ::StartDocA((HDC) m_hDC, &docinfo)); -#endif -#endif + int rop; - else flag = FALSE; + switch (m_logicalFunction) + { + case wxCLEAR: rop = R2_BLACK; break; + case wxXOR: rop = R2_XORPEN; break; + case wxINVERT: rop = R2_NOT; break; + case wxOR_REVERSE: rop = R2_MERGEPENNOT; break; + case wxAND_REVERSE: rop = R2_MASKPENNOT; break; + case wxCOPY: rop = R2_COPYPEN; break; + case wxAND: rop = R2_MASKPEN; break; + case wxAND_INVERT: rop = R2_MASKNOTPEN; break; + case wxNO_OP: rop = R2_NOP; break; + case wxNOR: rop = R2_NOTMERGEPEN; break; + case wxEQUIV: rop = R2_NOTXORPEN; break; + case wxSRC_INVERT: rop = R2_NOTCOPYPEN; break; + case wxOR_INVERT: rop = R2_MERGENOTPEN; break; + case wxNAND: rop = R2_NOTMASKPEN; break; + case wxOR: rop = R2_MERGEPEN; break; + case wxSET: rop = R2_WHITE; break; + + default: + wxFAIL_MSG( wxT("unsupported logical function") ); + return; + } - return flag; + SetROP2(GetHdc(), rop); } -void wxDC::EndDoc(void) +bool wxDC::StartDoc(const wxString& WXUNUSED(message)) { - if (!this->IsKindOf(CLASSINFO(wxPrinterDC))) - return; - if (m_hDC) ::EndDoc((HDC) m_hDC); + // We might be previewing, so return TRUE to let it continue. + return TRUE; } -void wxDC::StartPage(void) +void wxDC::EndDoc() { - if (!this->IsKindOf(CLASSINFO(wxPrinterDC))) - return; - if (m_hDC) - ::StartPage((HDC) m_hDC); } -void wxDC::EndPage(void) +void wxDC::StartPage() { - if (!this->IsKindOf(CLASSINFO(wxPrinterDC))) - return; - if (m_hDC) - ::EndPage((HDC) m_hDC); } -long wxDC::GetCharHeight(void) const +void wxDC::EndPage() { - TEXTMETRIC lpTextMetric; - - GetTextMetrics((HDC) m_hDC, &lpTextMetric); - - return YDEV2LOGREL(lpTextMetric.tmHeight); } -long wxDC::GetCharWidth(void) const +// --------------------------------------------------------------------------- +// text metrics +// --------------------------------------------------------------------------- + +wxCoord wxDC::GetCharHeight() const { - TEXTMETRIC lpTextMetric; +#ifdef __WXMICROWIN__ + if (!GetHDC()) return 0; +#endif + + TEXTMETRIC lpTextMetric; - GetTextMetrics((HDC) m_hDC, &lpTextMetric); + GetTextMetrics(GetHdc(), &lpTextMetric); - return XDEV2LOGREL(lpTextMetric.tmAveCharWidth); + return lpTextMetric.tmHeight; } -void wxDC::GetTextExtent(const wxString& string, long *x, long *y, - long *descent, long *externalLeading, wxFont *theFont, bool use16bit) const +wxCoord wxDC::GetCharWidth() const { - wxFont *fontToUse = (wxFont*) theFont; - if (!fontToUse) - fontToUse = (wxFont*) &m_font; +#ifdef __WXMICROWIN__ + if (!GetHDC()) return 0; +#endif - SIZE sizeRect; - TEXTMETRIC tm; + TEXTMETRIC lpTextMetric; - GetTextExtentPoint((HDC) m_hDC, (char *)(const char *) string, strlen((char *)(const char *) string), &sizeRect); - GetTextMetrics((HDC) m_hDC, &tm); + GetTextMetrics(GetHdc(), &lpTextMetric); - *x = XDEV2LOGREL(sizeRect.cx); - *y = YDEV2LOGREL(sizeRect.cy); - if (descent) *descent = tm.tmDescent; - if (externalLeading) *externalLeading = tm.tmExternalLeading; + return lpTextMetric.tmAveCharWidth; } -void wxDC::SetMapMode(int mode) +void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y, + wxCoord *descent, wxCoord *externalLeading, + wxFont *font) const { - m_mappingMode = mode; +#ifdef __WXMICROWIN__ + if (!GetHDC()) + { + if (x) *x = 0; + if (y) *y = 0; + if (descent) *descent = 0; + if (externalLeading) *externalLeading = 0; + return; + } +#endif // __WXMICROWIN__ - int pixel_width = 0; - int pixel_height = 0; - int mm_width = 0; - int mm_height = 0; + HFONT hfontOld; + if ( font ) + { + wxASSERT_MSG( font->Ok(), _T("invalid font in wxDC::GetTextExtent") ); - BeginDrawing(); + hfontOld = (HFONT)::SelectObject(GetHdc(), GetHfontOf(*font)); + } + else // don't change the font + { + hfontOld = 0; + } - pixel_width = GetDeviceCaps((HDC) m_hDC, HORZRES); - pixel_height = GetDeviceCaps((HDC) m_hDC, VERTRES); - mm_width = GetDeviceCaps((HDC) m_hDC, HORZSIZE); - mm_height = GetDeviceCaps((HDC) m_hDC, VERTSIZE); + SIZE sizeRect; + TEXTMETRIC tm; - if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0)) - { -// if (!m_hDC && m_canvas) -// m_canvas->ReleaseHDC() ; - return; - } + GetTextExtentPoint(GetHdc(), string, string.length(), &sizeRect); + GetTextMetrics(GetHdc(), &tm); - double mm2pixelsX = pixel_width/mm_width; - double mm2pixelsY = pixel_height/mm_height; + if (x) + *x = sizeRect.cx; + if (y) + *y = sizeRect.cy; + if (descent) + *descent = tm.tmDescent; + if (externalLeading) + *externalLeading = tm.tmExternalLeading; - switch (mode) - { - case MM_TWIPS: - { - m_logicalScaleX = (twips2mm * mm2pixelsX); - m_logicalScaleY = (twips2mm * mm2pixelsY); - break; - } - case MM_POINTS: + if ( hfontOld ) { - m_logicalScaleX = (pt2mm * mm2pixelsX); - m_logicalScaleY = (pt2mm * mm2pixelsY); - break; + ::SelectObject(GetHdc(), hfontOld); } - case MM_METRIC: - { - m_logicalScaleX = mm2pixelsX; - m_logicalScaleY = mm2pixelsY; - break; - } - case MM_LOMETRIC: +} + +void wxDC::SetMapMode(int mode) +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif + + m_mappingMode = mode; + + if ( mode == wxMM_TEXT ) { - m_logicalScaleX = (mm2pixelsX/10.0); - m_logicalScaleY = (mm2pixelsY/10.0); - break; + m_logicalScaleX = + m_logicalScaleY = 1.0; } - default: - case MM_TEXT: + else // need to do some calculations { - m_logicalScaleX = 1.0; - m_logicalScaleY = 1.0; - break; + int pixel_width = ::GetDeviceCaps(GetHdc(), HORZRES), + pixel_height = ::GetDeviceCaps(GetHdc(), VERTRES), + mm_width = ::GetDeviceCaps(GetHdc(), HORZSIZE), + mm_height = ::GetDeviceCaps(GetHdc(), VERTSIZE); + + if ( (mm_width == 0) || (mm_height == 0) ) + { + // we can't calculate mm2pixels[XY] then! + return; + } + + double mm2pixelsX = (double)pixel_width / mm_width, + mm2pixelsY = (double)pixel_height / mm_height; + + switch (mode) + { + case wxMM_TWIPS: + m_logicalScaleX = twips2mm * mm2pixelsX; + m_logicalScaleY = twips2mm * mm2pixelsY; + break; + + case wxMM_POINTS: + m_logicalScaleX = pt2mm * mm2pixelsX; + m_logicalScaleY = pt2mm * mm2pixelsY; + break; + + case wxMM_METRIC: + m_logicalScaleX = mm2pixelsX; + m_logicalScaleY = mm2pixelsY; + break; + + case wxMM_LOMETRIC: + m_logicalScaleX = mm2pixelsX / 10.0; + m_logicalScaleY = mm2pixelsY / 10.0; + break; + + default: + wxFAIL_MSG( _T("unknown mapping mode in SetMapMode") ); + } } - } - if (::GetMapMode((HDC) m_hDC) != MM_ANISOTROPIC) - ::SetMapMode((HDC) m_hDC, MM_ANISOTROPIC); + // VZ: it seems very wasteful to always use MM_ANISOTROPIC when in 99% of + // cases we could do with MM_TEXT and in the remaining 0.9% with + // MM_ISOTROPIC (TODO!) +#ifndef __WXWINCE__ + ::SetMapMode(GetHdc(), MM_ANISOTROPIC); + + int width = DeviceToLogicalXRel(VIEWPORT_EXTENT)*m_signX, + height = DeviceToLogicalYRel(VIEWPORT_EXTENT)*m_signY; - SetViewportExtEx((HDC) m_hDC, VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL); - m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT); - m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT); - ::SetWindowExtEx((HDC) m_hDC, m_windowExtX, m_windowExtY, NULL); - ::SetViewportOrgEx((HDC) m_hDC, (int)m_deviceOriginX, (int)m_deviceOriginY, NULL); - ::SetWindowOrgEx((HDC) m_hDC, (int)m_logicalOriginX, (int)m_logicalOriginY, NULL); + ::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL); + ::SetWindowExtEx(GetHdc(), width, height, NULL); - EndDrawing(); + ::SetViewportOrgEx(GetHdc(), m_deviceOriginX, m_deviceOriginY, NULL); + ::SetWindowOrgEx(GetHdc(), m_logicalOriginX, m_logicalOriginY, NULL); +#endif } void wxDC::SetUserScale(double x, double y) { - m_userScaleX = x; - m_userScaleY = y; +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - SetMapMode(m_mappingMode); -} +#ifndef __WXWINCE__ + if ( x == m_userScaleX && y == m_userScaleY ) + return; -void wxDC::SetSystemScale(double x, double y) -{ - m_systemScaleX = x; - m_systemScaleY = y; + m_userScaleX = x; + m_userScaleY = y; - SetMapMode(m_mappingMode); + SetMapMode(m_mappingMode); +#endif } -void wxDC::SetLogicalOrigin(long x, long y) +void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp) { - m_logicalOriginX = x; - m_logicalOriginY = y; +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - BeginDrawing(); +#ifndef __WXWINCE__ + int signX = xLeftRight ? 1 : -1, + signY = yBottomUp ? -1 : 1; - ::SetWindowOrgEx((HDC) m_hDC, (int)m_logicalOriginX, (int)m_logicalOriginY, NULL); + if ( signX != m_signX || signY != m_signY ) + { + m_signX = signX; + m_signY = signY; - EndDrawing(); + SetMapMode(m_mappingMode); + } +#endif } -void wxDC::SetDeviceOrigin(long x, long y) +void wxDC::SetSystemScale(double x, double y) { - m_deviceOriginX = x; - m_deviceOriginY = y; +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - BeginDrawing(); +#ifndef __WXWINCE__ + if ( x == m_scaleX && y == m_scaleY ) + return; - ::SetViewportOrgEx((HDC) m_hDC, (int)m_deviceOriginX, (int)m_deviceOriginY, NULL); + m_scaleX = x; + m_scaleY = y; - EndDrawing(); + SetMapMode(m_mappingMode); +#endif } -long wxDC::DeviceToLogicalX(long x) const +void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y) { - return (long) (((x) - m_deviceOriginX)/(m_logicalScaleX*m_userScaleX*m_systemScaleX) - m_logicalOriginX) ; -} +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif -long wxDC::DeviceToLogicalXRel(long x) const -{ - return (long) ((x)/(m_logicalScaleX*m_userScaleX*m_systemScaleX)) ; -} +#ifndef __WXWINCE__ + if ( x == m_logicalOriginX && y == m_logicalOriginY ) + return; -long wxDC::DeviceToLogicalY(long y) const -{ - return (long) (((y) - m_deviceOriginY)/(m_logicalScaleY*m_userScaleY*m_systemScaleY) - m_logicalOriginY) ; -} + m_logicalOriginX = x; + m_logicalOriginY = y; -long wxDC::DeviceToLogicalYRel(long y) const -{ - return (long) ((y)/(m_logicalScaleY*m_userScaleY*m_systemScaleY)) ; + ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL); +#endif } -long wxDC::LogicalToDeviceX(long x) const +void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y) { - return (long) (floor((x) - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_systemScaleX + m_deviceOriginX) ; -} +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif -long wxDC::LogicalToDeviceXRel(long x) const -{ - return (long) (floor(x)*m_logicalScaleX*m_userScaleX*m_systemScaleX) ; -} +#ifndef __WXWINCE__ + if ( x == m_deviceOriginX && y == m_deviceOriginY ) + return; -long wxDC::LogicalToDeviceY(long y) const -{ - return (long) (floor((y) - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_systemScaleY + m_deviceOriginY); -} + m_deviceOriginX = x; + m_deviceOriginY = y; -long wxDC::LogicalToDeviceYRel(long y) const -{ - return (long) (floor(y)*m_logicalScaleY*m_userScaleY*m_systemScaleY) ; + ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL); +#endif } -// This group of functions may not do any conversion -// if m_scaleGDI is TRUE, since the HDC does the -// conversion automatically. +// --------------------------------------------------------------------------- +// coordinates transformations +// --------------------------------------------------------------------------- -long wxDC::ImplDeviceToLogicalX(long x) const +wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const { -// return (m_scaleGDI ? x : DeviceToLogicalX(x)); - return x; + return DeviceToLogicalXRel(x - m_deviceOriginX)*m_signX + m_logicalOriginX; } -long wxDC::ImplDeviceToLogicalY(long y) const +wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const { -// return (m_scaleGDI ? y : DeviceToLogicalY(y)); - return y; + // axis orientation is not taken into account for conversion of a distance + return (wxCoord)(x / (m_logicalScaleX*m_userScaleX*m_scaleX)); } -long wxDC::ImplDeviceToLogicalXRel(long x) const +wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const { -// return (m_scaleGDI ? x : DeviceToLogicalXRel(x)); - return x; + return DeviceToLogicalYRel(y - m_deviceOriginY)*m_signY + m_logicalOriginY; } -long wxDC::ImplDeviceToLogicalYRel(long y) const +wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const { -// return (m_scaleGDI ? y : DeviceToLogicalYRel(y)); - return y; + // axis orientation is not taken into account for conversion of a distance + return (wxCoord)( y / (m_logicalScaleY*m_userScaleY*m_scaleY)); } -long wxDC::ImplLogicalToDeviceX(long x) const +wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const { -// return (m_scaleGDI ? (floor(double(x))) : LogicalToDeviceX(x)); - return x; + return LogicalToDeviceXRel(x - m_logicalOriginX)*m_signX + m_deviceOriginX; } -long wxDC::ImplLogicalToDeviceY(long y) const +wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const { -// return (m_scaleGDI ? (floor(double(y))) : LogicalToDeviceY(y)); - return y; + // axis orientation is not taken into account for conversion of a distance + return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_scaleX); } -long wxDC::ImplLogicalToDeviceXRel(long x) const +wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const { -// return (m_scaleGDI ? (floor(double(x))) : LogicalToDeviceXRel(x)); - return x; + return LogicalToDeviceYRel(y - m_logicalOriginY)*m_signY + m_deviceOriginY; } -long wxDC::ImplLogicalToDeviceYRel(long y) const +wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const { -// return (m_scaleGDI ? (floor(double(y))) : LogicalToDeviceYRel(y)); - return y; + // axis orientation is not taken into account for conversion of a distance + return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_scaleY); } -bool wxDC::Blit(long xdest, long ydest, long width, long height, - wxDC *source, long xsrc, long ysrc, int rop, bool useMask) +// --------------------------------------------------------------------------- +// bit blit +// --------------------------------------------------------------------------- + +bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, + wxCoord width, wxCoord height, + wxDC *source, wxCoord xsrc, wxCoord ysrc, + int rop, bool useMask, + wxCoord xsrcMask, wxCoord ysrcMask) { - BeginDrawing(); - source->BeginDrawing(); + wxCHECK_MSG( source, FALSE, _T("wxDC::Blit(): NULL wxDC pointer") ); - long xdest1 = xdest; - long ydest1 = ydest; - long xsrc1 = xsrc; - long ysrc1 = ysrc; +#ifdef __WXMICROWIN__ + if (!GetHDC()) return FALSE; +#endif - DWORD dwRop = rop == wxCOPY ? SRCCOPY : - rop == wxCLEAR ? WHITENESS : - rop == wxSET ? BLACKNESS : - rop == wxINVERT ? DSTINVERT : - rop == wxAND ? MERGECOPY : - rop == wxOR ? MERGEPAINT : - rop == wxSRC_INVERT ? NOTSRCCOPY : - rop == wxXOR ? SRCINVERT : - rop == wxOR_REVERSE ? MERGEPAINT : - rop == wxAND_REVERSE ? SRCERASE : - rop == wxSRC_OR ? SRCPAINT : - rop == wxSRC_AND ? SRCAND : - SRCCOPY; + const wxBitmap& bmpSrc = source->m_selectedBitmap; + if ( bmpSrc.Ok() && bmpSrc.HasAlpha() ) + { + if ( AlphaBlt(GetHdc(), xdest, ydest, width, height, + GetHdcOf(*source), bmpSrc) ) + return TRUE; + } - bool success; - if (useMask && source->m_selectedBitmap.Ok() && source->m_selectedBitmap.GetMask()) - { + wxMask *mask = NULL; + if ( useMask ) + { + mask = bmpSrc.GetMask(); + + if ( !(bmpSrc.Ok() && mask && mask->GetMaskBitmap()) ) + { + // don't give assert here because this would break existing + // programs - just silently ignore useMask parameter + useMask = FALSE; + } + } -#if 0 // __WIN32__ - // Not implemented under Win95 (or maybe a specific device?) - if (MaskBlt((HDC) m_hDC, xdest1, ydest1, (int)width, (int)height, - (HDC) source->m_hDC, xsrc1, ysrc1, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap(), - 0, 0, 0xAACC0020)) + if (xsrcMask == -1 && ysrcMask == -1) { - // Success + xsrcMask = xsrc; ysrcMask = ysrc; } - else + + COLORREF old_textground = ::GetTextColor(GetHdc()); + COLORREF old_background = ::GetBkColor(GetHdc()); + if (m_textForegroundColour.Ok()) + { + ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() ); + } + if (m_textBackgroundColour.Ok()) + { + ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() ); + } + + DWORD dwRop = SRCCOPY; + switch (rop) + { + case wxXOR: dwRop = SRCINVERT; break; + case wxINVERT: dwRop = DSTINVERT; break; + case wxOR_REVERSE: dwRop = 0x00DD0228; break; + case wxAND_REVERSE: dwRop = SRCERASE; break; + case wxCLEAR: dwRop = BLACKNESS; break; + case wxSET: dwRop = WHITENESS; break; + case wxOR_INVERT: dwRop = MERGEPAINT; break; + case wxAND: dwRop = SRCAND; break; + case wxOR: dwRop = SRCPAINT; break; + case wxEQUIV: dwRop = 0x00990066; break; + case wxNAND: dwRop = 0x007700E6; break; + case wxAND_INVERT: dwRop = 0x00220326; break; + case wxCOPY: dwRop = SRCCOPY; break; + case wxNO_OP: dwRop = DSTCOPY; break; + case wxSRC_INVERT: dwRop = NOTSRCCOPY; break; + case wxNOR: dwRop = NOTSRCCOPY; break; + default: + wxFAIL_MSG( wxT("unsupported logical function") ); + return FALSE; + } + + bool success = FALSE; + + if (useMask) + { +#ifdef __WIN32__ + // we want the part of the image corresponding to the mask to be + // transparent, so use "DSTCOPY" ROP for the mask points (the usual + // meaning of fg and bg is inverted which corresponds to wxWin notion + // of the mask which is also contrary to the Windows one) + + // On some systems, MaskBlt succeeds yet is much much slower + // than the wxWindows fall-back implementation. So we need + // to be able to switch this on and off at runtime. +#if wxUSE_SYSTEM_OPTIONS + if (wxSystemOptions::GetOptionInt(wxT("no-maskblt")) == 0) +#endif + { + success = ::MaskBlt + ( + GetHdc(), + xdest, ydest, width, height, + GetHdcOf(*source), + xsrc, ysrc, + (HBITMAP)mask->GetMaskBitmap(), + xsrcMask, ysrcMask, + MAKEROP4(dwRop, DSTCOPY) + ) != 0; + } + + if ( !success ) +#endif // Win32 + { + // Blit bitmap with mask + HDC dc_mask ; + HDC dc_buffer ; + HBITMAP buffer_bmap ; + +#if wxUSE_DC_CACHEING + // create a temp buffer bitmap and DCs to access it and the mask + wxDCCacheEntry* dcCacheEntry1 = FindDCInCache(NULL, source->GetHDC()); + dc_mask = (HDC) dcCacheEntry1->m_dc; + + wxDCCacheEntry* dcCacheEntry2 = FindDCInCache(dcCacheEntry1, GetHDC()); + dc_buffer = (HDC) dcCacheEntry2->m_dc; + + wxDCCacheEntry* bitmapCacheEntry = FindBitmapInCache(GetHDC(), + width, height); + + buffer_bmap = (HBITMAP) bitmapCacheEntry->m_bitmap; +#else // !wxUSE_DC_CACHEING + // create a temp buffer bitmap and DCs to access it and the mask + dc_mask = ::CreateCompatibleDC(GetHdcOf(*source)); + dc_buffer = ::CreateCompatibleDC(GetHdc()); + buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height); +#endif // wxUSE_DC_CACHEING/!wxUSE_DC_CACHEING + HGDIOBJ hOldMaskBitmap = ::SelectObject(dc_mask, (HBITMAP) mask->GetMaskBitmap()); + HGDIOBJ hOldBufferBitmap = ::SelectObject(dc_buffer, buffer_bmap); + + // copy dest to buffer + if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height, + GetHdc(), xdest, ydest, SRCCOPY) ) + { + wxLogLastError(wxT("BitBlt")); + } + + // copy src to buffer using selected raster op + if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height, + GetHdcOf(*source), xsrc, ysrc, dwRop) ) + { + wxLogLastError(wxT("BitBlt")); + } + + // set masked area in buffer to BLACK (pixel value 0) + COLORREF prevBkCol = ::SetBkColor(GetHdc(), RGB(255, 255, 255)); + COLORREF prevCol = ::SetTextColor(GetHdc(), RGB(0, 0, 0)); + if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height, + dc_mask, xsrcMask, ysrcMask, SRCAND) ) + { + wxLogLastError(wxT("BitBlt")); + } + + // set unmasked area in dest to BLACK + ::SetBkColor(GetHdc(), RGB(0, 0, 0)); + ::SetTextColor(GetHdc(), RGB(255, 255, 255)); + if ( !::BitBlt(GetHdc(), xdest, ydest, (int)width, (int)height, + dc_mask, xsrcMask, ysrcMask, SRCAND) ) + { + wxLogLastError(wxT("BitBlt")); + } + ::SetBkColor(GetHdc(), prevBkCol); // restore colours to original values + ::SetTextColor(GetHdc(), prevCol); + + // OR buffer to dest + success = ::BitBlt(GetHdc(), xdest, ydest, + (int)width, (int)height, + dc_buffer, 0, 0, SRCPAINT) != 0; + if ( !success ) + { + wxLogLastError(wxT("BitBlt")); + } + + // tidy up temporary DCs and bitmap + ::SelectObject(dc_mask, hOldMaskBitmap); + ::SelectObject(dc_buffer, hOldBufferBitmap); + +#if !wxUSE_DC_CACHEING + { + ::DeleteDC(dc_mask); + ::DeleteDC(dc_buffer); + ::DeleteObject(buffer_bmap); + } #endif + } + } + else // no mask, just BitBlt() it { - // Old code -#if 0 - HDC dc_mask = CreateCompatibleDC((HDC) source->m_hDC); - ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap()); - success = (BitBlt((HDC) m_hDC, xdest1, ydest1, (int)width, (int)height, - dc_mask, xsrc1, ysrc1, 0x00220326 /* NOTSRCAND */) != 0); - success = (BitBlt((HDC) m_hDC, xdest1, ydest1, (int)width, (int)height, - (HDC) source->m_hDC, xsrc1, ysrc1, SRCPAINT) != 0); - ::SelectObject(dc_mask, 0); - ::DeleteDC(dc_mask); -#endif - // New code from Chris Breeze, 8/5/98 - - // create a temp buffer bitmap and DCs to access it and the mask - HDC dc_mask = ::CreateCompatibleDC((HDC) source->m_hDC); - HDC dc_buffer = ::CreateCompatibleDC((HDC) m_hDC); - HBITMAP buffer_bmap = ::CreateCompatibleBitmap((HDC) m_hDC, width, height); - ::SelectObject(dc_mask, (HBITMAP) source->m_selectedBitmap.GetMask()->GetMaskBitmap()); - ::SelectObject(dc_buffer, buffer_bmap); - - // copy dest to buffer - ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height, - (HDC) m_hDC, xdest1, ydest1, SRCCOPY); + // if we already have a DIB, draw it using StretchDIBits(), otherwise + // use StretchBlt() if available and finally fall back to BitBlt() + + // FIXME: use appropriate WinCE functions +#ifndef __WXWINCE__ + const int caps = ::GetDeviceCaps(GetHdc(), RASTERCAPS); + if ( bmpSrc.Ok() && (caps & RC_STRETCHDIB) ) + { + DIBSECTION ds; + wxZeroMemory(ds); + + if ( ::GetObject(GetHbitmapOf(bmpSrc), + sizeof(ds), + &ds) == sizeof(ds) ) + { + StretchBltModeChanger changeMode(GetHdc(), COLORONCOLOR); + + if ( ::StretchDIBits(GetHdc(), + xdest, ydest, + width, height, + 0, 0, + width, height, + ds.dsBm.bmBits, + (LPBITMAPINFO)&ds.dsBmih, + DIB_RGB_COLORS, + SRCCOPY + ) == (int)GDI_ERROR ) + { + wxLogLastError(wxT("StretchDIBits")); + } + else + { + success = TRUE; + } + } + } + + if ( !success && (caps & RC_STRETCHBLT) ) +#endif + // __WXWINCE__ + { +#ifndef __WXWINCE__ + StretchBltModeChanger changeMode(GetHdc(), COLORONCOLOR); +#endif + + if ( !::StretchBlt + ( + GetHdc(), + xdest, ydest, width, height, + GetHdcOf(*source), + xsrc, ysrc, width, height, + dwRop + ) ) + { + wxLogLastError(_T("StretchBlt")); + } + else + { + success = TRUE; + } + } + + if ( !success ) + { + if ( !::BitBlt + ( + GetHdc(), + xdest, ydest, + (int)width, (int)height, + GetHdcOf(*source), + xsrc, ysrc, + dwRop + ) ) + { + wxLogLastError(_T("BitBlt")); + } + else + { + success = TRUE; + } + } + } + + ::SetTextColor(GetHdc(), old_textground); + ::SetBkColor(GetHdc(), old_background); + + return success; +} + +void wxDC::DoGetSize(int *w, int *h) const +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif + + if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES); + if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES); +} - // copy src to buffer using selected raster op - ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height, - (HDC) source->m_hDC, xsrc1, ysrc1, dwRop); +void wxDC::DoGetSizeMM(int *w, int *h) const +{ +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif - // set masked area in buffer to BLACK (pixel value 0) - COLORREF prevBkCol = ::SetBkColor((HDC) m_hDC, RGB(255, 255, 255)); - COLORREF prevCol = ::SetTextColor((HDC) m_hDC, RGB(0, 0, 0)); - ::BitBlt(dc_buffer, 0, 0, (int)width, (int)height, - dc_mask, xsrc1, ysrc1, SRCAND); + // if we implement it in terms of DoGetSize() instead of directly using the + // results returned by GetDeviceCaps(HORZ/VERTSIZE) as was done before, it + // will also work for wxWindowDC and wxClientDC even though their size is + // not the same as the total size of the screen + int wPixels, hPixels; + DoGetSize(&wPixels, &hPixels); - // set unmasked area in dest to BLACK - ::SetBkColor((HDC) m_hDC, RGB(0, 0, 0)); - ::SetTextColor((HDC) m_hDC, RGB(255, 255, 255)); - ::BitBlt((HDC) m_hDC, xdest1, ydest1, (int)width, (int)height, - dc_mask, xsrc1, ysrc1, SRCAND); - ::SetBkColor((HDC) m_hDC, prevBkCol); // restore colours to original values - ::SetTextColor((HDC) m_hDC, prevCol); + if ( w ) + { + int wTotal = ::GetDeviceCaps(GetHdc(), HORZRES); - // OR buffer to dest - success = (::BitBlt((HDC) m_hDC, xdest1, ydest1, (int)width, (int)height, - dc_buffer, 0, 0, SRCPAINT) != 0); + wxCHECK_RET( wTotal, _T("0 width device?") ); - // tidy up temporary DCs and bitmap - ::SelectObject(dc_mask, 0); - ::DeleteDC(dc_mask); - ::SelectObject(dc_buffer, 0); - ::DeleteDC(dc_buffer); - ::DeleteObject(buffer_bmap); + *w = (wPixels * ::GetDeviceCaps(GetHdc(), HORZSIZE)) / wTotal; } - } - else - { - success = (BitBlt((HDC) m_hDC, xdest1, ydest1, (int)width, (int)height, (HDC) source->m_hDC, - xsrc1, ysrc1, dwRop) != 0); - } - source->EndDrawing(); - EndDrawing(); - return success; + if ( h ) + { + int hTotal = ::GetDeviceCaps(GetHdc(), VERTRES); + + wxCHECK_RET( hTotal, _T("0 height device?") ); + + *h = (hPixels * ::GetDeviceCaps(GetHdc(), VERTSIZE)) / hTotal; + } } -void wxDC::GetSize(int* width, int* height) const +wxSize wxDC::GetPPI() const { - long w=::GetDeviceCaps((HDC) m_hDC,HORZRES); - long h=::GetDeviceCaps((HDC) m_hDC,VERTRES); - *width = w; - *height = h; +#ifdef __WXMICROWIN__ + if (!GetHDC()) return wxSize(); +#endif + + int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX); + int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY); + + return wxSize(x, y); } -void wxDC::GetSizeMM(long *width, long *height) const +// For use by wxWindows only, unless custom units are required. +void wxDC::SetLogicalScale(double x, double y) { - long w=::GetDeviceCaps((HDC) m_hDC,HORZSIZE); - long h=::GetDeviceCaps((HDC) m_hDC,VERTSIZE); - *width = w; - *height = h; +#ifdef __WXMICROWIN__ + if (!GetHDC()) return; +#endif + + m_logicalScaleX = x; + m_logicalScaleY = y; } -#if USE_SPLINES -# if USE_XFIG_SPLINE_CODE -# include "../common/xfspline.inc" -# else -# include "../common/wxspline.inc" -# endif -#endif // USE_SPLINES +// ---------------------------------------------------------------------------- +// DC caching +// ---------------------------------------------------------------------------- + +#if wxUSE_DC_CACHEING + +/* + * This implementation is a bit ugly and uses the old-fashioned wxList class, so I will + * improve it in due course, either using arrays, or simply storing pointers to one + * entry for the bitmap, and two for the DCs. -- JACS + */ + +wxList wxDC::sm_bitmapCache; +wxList wxDC::sm_dcCache; -void wxDC::DrawPolygon(wxList *list, long xoffset, long yoffset,int fillStyle) +wxDCCacheEntry::wxDCCacheEntry(WXHBITMAP hBitmap, int w, int h, int depth) { - int n = list->Number(); - wxPoint *points = new wxPoint[n]; + m_bitmap = hBitmap; + m_dc = 0; + m_width = w; + m_height = h; + m_depth = depth; +} - int i = 0; - for(wxNode *node = list->First(); node; node = node->Next()) { - wxPoint *point = (wxPoint *)node->Data(); - points[i].x = point->x; - points[i++].y = point->y; - } - DrawPolygon(n, points, xoffset, yoffset,fillStyle); - delete[] points; +wxDCCacheEntry::wxDCCacheEntry(WXHDC hDC, int depth) +{ + m_bitmap = 0; + m_dc = hDC; + m_width = 0; + m_height = 0; + m_depth = depth; } -void wxDC::DrawLines(wxList *list, long xoffset, long yoffset) +wxDCCacheEntry::~wxDCCacheEntry() { - int n = list->Number(); - wxPoint *points = new wxPoint[n]; + if (m_bitmap) + ::DeleteObject((HBITMAP) m_bitmap); + if (m_dc) + ::DeleteDC((HDC) m_dc); +} - int i = 0; - for(wxNode *node = list->First(); node; node = node->Next()) { - wxPoint *point = (wxPoint *)node->Data(); - points[i].x = point->x; - points[i++].y = point->y; - } - DrawLines(n, points, xoffset, yoffset); - delete []points; +wxDCCacheEntry* wxDC::FindBitmapInCache(WXHDC dc, int w, int h) +{ + int depth = ::GetDeviceCaps((HDC) dc, PLANES) * ::GetDeviceCaps((HDC) dc, BITSPIXEL); + wxList::compatibility_iterator node = sm_bitmapCache.GetFirst(); + while (node) + { + wxDCCacheEntry* entry = (wxDCCacheEntry*) node->GetData(); + + if (entry->m_depth == depth) + { + if (entry->m_width < w || entry->m_height < h) + { + ::DeleteObject((HBITMAP) entry->m_bitmap); + entry->m_bitmap = (WXHBITMAP) ::CreateCompatibleBitmap((HDC) dc, w, h); + if ( !entry->m_bitmap) + { + wxLogLastError(wxT("CreateCompatibleBitmap")); + } + entry->m_width = w; entry->m_height = h; + return entry; + } + return entry; + } + + node = node->GetNext(); + } + WXHBITMAP hBitmap = (WXHBITMAP) ::CreateCompatibleBitmap((HDC) dc, w, h); + if ( !hBitmap) + { + wxLogLastError(wxT("CreateCompatibleBitmap")); + } + wxDCCacheEntry* entry = new wxDCCacheEntry(hBitmap, w, h, depth); + AddToBitmapCache(entry); + return entry; } -void wxDC::SetTextForeground(const wxColour& colour) +wxDCCacheEntry* wxDC::FindDCInCache(wxDCCacheEntry* notThis, WXHDC dc) { - m_textForegroundColour = colour; + int depth = ::GetDeviceCaps((HDC) dc, PLANES) * ::GetDeviceCaps((HDC) dc, BITSPIXEL); + wxList::compatibility_iterator node = sm_dcCache.GetFirst(); + while (node) + { + wxDCCacheEntry* entry = (wxDCCacheEntry*) node->GetData(); + + // Don't return the same one as we already have + if (!notThis || (notThis != entry)) + { + if (entry->m_depth == depth) + { + return entry; + } + } + + node = node->GetNext(); + } + WXHDC hDC = (WXHDC) ::CreateCompatibleDC((HDC) dc); + if ( !hDC) + { + wxLogLastError(wxT("CreateCompatibleDC")); + } + wxDCCacheEntry* entry = new wxDCCacheEntry(hDC, depth); + AddToDCCache(entry); + return entry; } -void wxDC::SetTextBackground(const wxColour& colour) +void wxDC::AddToBitmapCache(wxDCCacheEntry* entry) { - m_textBackgroundColour = colour; + sm_bitmapCache.Append(entry); } -#if USE_SPLINES -// Make a 3-point spline -void wxDC::DrawSpline(long x1, long y1, long x2, long y2, long x3, long y3) +void wxDC::AddToDCCache(wxDCCacheEntry* entry) { - wxList *point_list = new wxList; + sm_dcCache.Append(entry); +} - wxPoint *point1 = new wxPoint; - point1->x = x1; point1->y = y1; - point_list->Append((wxObject*)point1); +void wxDC::ClearCache() +{ + WX_CLEAR_LIST(wxList, sm_dcCache); + WX_CLEAR_LIST(wxList, sm_bitmapCache); +} - wxPoint *point2 = new wxPoint; - point2->x = x2; point2->y = y2; - point_list->Append((wxObject*)point2); +// Clean up cache at app exit +class wxDCModule : public wxModule +{ +public: + virtual bool OnInit() { return TRUE; } + virtual void OnExit() { wxDC::ClearCache(); } - wxPoint *point3 = new wxPoint; - point3->x = x3; point3->y = y3; - point_list->Append((wxObject*)point3); +private: + DECLARE_DYNAMIC_CLASS(wxDCModule) +}; - DrawSpline(point_list); +IMPLEMENT_DYNAMIC_CLASS(wxDCModule, wxModule) - for(wxNode *node = point_list->First(); node; node = node->Next()) { - wxPoint *p = (wxPoint *)node->Data(); - delete p; - } - delete point_list; -/* - wxSpline spline(point_list); +#endif // wxUSE_DC_CACHEING - wx_draw_open_spline(this, &spline); - spline.DeletePoints(); - */ -} -#endif +// ---------------------------------------------------------------------------- +// alpha channel support +// ---------------------------------------------------------------------------- -// For use by wxWindows only, unless custom units are required. -void wxDC::SetLogicalScale(double x, double y) +static bool AlphaBlt(HDC hdcDst, + int x, int y, int width, int height, + HDC hdcSrc, + const wxBitmap& bmp) { - m_logicalScaleX = x; - m_logicalScaleY = y; -} + wxASSERT_MSG( bmp.Ok() && bmp.HasAlpha(), _T("AlphaBlt(): invalid bitmap") ); + wxASSERT_MSG( hdcDst && hdcSrc, _T("AlphaBlt(): invalid HDC") ); -void wxDC::CalcBoundingBox(long x, long y) -{ - if (x < m_minX) m_minX = x; - if (y < m_minY) m_minY = y; - if (x > m_maxX) m_maxX = x; - if (y > m_maxY) m_maxY = y; -} + // do we have AlphaBlend() and company in the headers? +#if defined(AC_SRC_OVER) && wxUSE_DYNLIB_CLASS + // yes, now try to see if we have it during run-time + typedef BOOL (WINAPI *AlphaBlend_t)(HDC,int,int,int,int, + HDC,int,int,int,int, + BLENDFUNCTION); -void wxDC::GetClippingBox(long *x,long *y,long *w,long *h) const -{ - if (m_clipping) - { - *x = m_clipX1 ; - *y = m_clipY1 ; - *w = (m_clipX2 - m_clipX1) ; - *h = (m_clipY2 - m_clipY1) ; - } - else - *x = *y = *w = *h = 0 ; + // bitmaps can be drawn only from GUI thread so there is no need to + // protect this static variable from multiple threads + static bool s_triedToLoad = FALSE; + static AlphaBlend_t pfnAlphaBlend = NULL; + if ( !s_triedToLoad ) + { + s_triedToLoad = TRUE; + + // don't give errors about the DLL being unavailable, we're + // prepared to handle this + wxLogNull nolog; + + wxDynamicLibrary dll(_T("msimg32.dll")); + if ( dll.IsLoaded() ) + { + pfnAlphaBlend = (AlphaBlend_t)dll.GetSymbol(_T("AlphaBlend")); + if ( pfnAlphaBlend ) + { + // we must keep the DLL loaded if we want to be able to + // call AlphaBlend() so just never unload it at all, not a + // big deal + dll.Detach(); + } + } + } + + if ( pfnAlphaBlend ) + { + BLENDFUNCTION bf; + bf.BlendOp = AC_SRC_OVER; + bf.BlendFlags = 0; + bf.SourceConstantAlpha = 0xff; + bf.AlphaFormat = AC_SRC_ALPHA; + + if ( pfnAlphaBlend(hdcDst, x, y, width, height, + hdcSrc, 0, 0, width, height, + bf) ) + { + // skip wxAlphaBlend() call below + return TRUE; + } + + wxLogLastError(_T("AlphaBlend")); + } +#endif // defined(AC_SRC_OVER) + + // AlphaBlend() unavailable of failed: use our own (probably much slower) + // implementation +#ifdef wxHAVE_RAW_BITMAP + wxAlphaBlend(hdcDst, x, y, width, height, bmp); + + return TRUE; +#else // !wxHAVE_RAW_BITMAP + // no wxAlphaBlend() neither, fall back to using simple BitBlt() (we lose + // alpha but at least something will be shown like this) + return FALSE; +#endif // wxHAVE_RAW_BITMAP } -#if WXWIN_COMPATIBILITY -void wxDC::GetTextExtent(const wxString& string, float *x, float *y, - float *descent, float *externalLeading, - wxFont *theFont, bool use16bit) const + +// wxAlphaBlend: our fallback if ::AlphaBlend() is unavailable +#ifdef wxHAVE_RAW_BITMAP + +static void +wxAlphaBlend(HDC hdcDst, int xDst, int yDst, int w, int h, const wxBitmap& bmpSrc) { - long x1, y1, descent1, externalLeading1; - GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit); - *x = x1; *y = y1; - if (descent) - *descent = descent1; - if (externalLeading) - *externalLeading = externalLeading1; + // get the destination DC pixels + wxBitmap bmpDst(w, h, 32 /* force creating RGBA DIB */); + MemoryHDC hdcMem; + SelectInHDC select(hdcMem, GetHbitmapOf(bmpDst)); + + if ( !::BitBlt(hdcMem, 0, 0, w, h, hdcDst, 0, 0, SRCCOPY) ) + { + wxLogLastError(_T("BitBlt")); + } + + // combine them with the source bitmap using alpha + wxAlphaPixelData dataDst(bmpDst), + dataSrc((wxBitmap &)bmpSrc); + + wxCHECK_RET( dataDst && dataSrc, + _T("failed to get raw data in wxAlphaBlend") ); + + wxAlphaPixelData::Iterator pDst(dataDst), + pSrc(dataSrc); + + for ( int y = 0; y < h; y++ ) + { + wxAlphaPixelData::Iterator pDstRowStart = pDst, + pSrcRowStart = pSrc; + + for ( int x = 0; x < w; x++ ) + { + // note that source bitmap uses premultiplied alpha (as required by + // the real AlphaBlend) + const unsigned beta = 255 - pSrc.Alpha(); + + pDst.Red() = pSrc.Red() + (beta * pDst.Red() + 127) / 255; + pDst.Blue() = pSrc.Blue() + (beta * pDst.Blue() + 127) / 255; + pDst.Green() = pSrc.Green() + (beta * pDst.Green() + 127) / 255; + + ++pDst; + ++pSrc; + } + + pDst = pDstRowStart; + pSrc = pSrcRowStart; + pDst.OffsetY(dataDst, 1); + pSrc.OffsetY(dataSrc, 1); + } + + // and finally blit them back to the destination DC + if ( !::BitBlt(hdcDst, xDst, yDst, w, h, hdcMem, 0, 0, SRCCOPY) ) + { + wxLogLastError(_T("BitBlt")); + } } -#endif +#endif // #ifdef wxHAVE_RAW_BITMAP