From: Vadim Zeitlin Date: Sat, 23 Apr 2011 16:03:10 +0000 (+0000) Subject: Add wxDC::SetTransformMatrix() and related methods and implement them in wxMSW. X-Git-Url: https://git.saurik.com/wxWidgets.git/commitdiff_plain/e71508e160653f122f8e5d7f73c2ebf7f928964b Add wxDC::SetTransformMatrix() and related methods and implement them in wxMSW. Add support for world transformations to wxDC too. Currently this is implemented in wxMSW only but could be easily provided in the ports that use wxGraphicsContext for wxDC implementation later. Closes #13092. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67588 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775 --- diff --git a/configure b/configure index a48880cce7..a97ed92aff 100755 --- a/configure +++ b/configure @@ -1899,6 +1899,7 @@ Optional Features: --enable-dragimage use wxDragImage --enable-accessibility enable accessibility support --enable-uiactionsim use wxUIActionSimulator (experimental) + --enable-dctransform use wxDC::SetTransformMatrix and related --enable-palette use wxPalette class --enable-image use wxImage class --enable-gif use gif images (GIF file format) @@ -14002,6 +14003,50 @@ fi echo "${ECHO_T}$result" >&6; } + enablestring= + defaultval=$wxUSE_ALL_FEATURES + if test -z "$defaultval"; then + if test x"$enablestring" = xdisable; then + defaultval=yes + else + defaultval=no + fi + fi + + { echo "$as_me:$LINENO: checking for --${enablestring:-enable}-dctransform" >&5 +echo $ECHO_N "checking for --${enablestring:-enable}-dctransform... $ECHO_C" >&6; } + # Check whether --enable-dctransform was given. +if test "${enable_dctransform+set}" = set; then + enableval=$enable_dctransform; + if test "$enableval" = yes; then + wx_cv_use_dctransform='wxUSE_DC_TRANSFORM_MATRIX=yes' + else + wx_cv_use_dctransform='wxUSE_DC_TRANSFORM_MATRIX=no' + fi + +else + + wx_cv_use_dctransform='wxUSE_DC_TRANSFORM_MATRIX=${'DEFAULT_wxUSE_DC_TRANSFORM_MATRIX":-$defaultval}" + +fi + + + eval "$wx_cv_use_dctransform" + + if test x"$enablestring" = xdisable; then + if test $wxUSE_DC_TRANSFORM_MATRIX = no; then + result=yes + else + result=no + fi + else + result=$wxUSE_DC_TRANSFORM_MATRIX + fi + + { echo "$as_me:$LINENO: result: $result" >&5 +echo "${ECHO_T}$result" >&6; } + + enablestring= @@ -47154,6 +47199,13 @@ _ACEOF SAMPLES_SUBDIRS="$SAMPLES_SUBDIRS uiaction" fi +if test "$wxUSE_DC_TRANSFORM_MATRIX" = "yes" ; then + cat >>confdefs.h <<\_ACEOF +#define wxUSE_DC_TRANSFORM_MATRIX 1 +_ACEOF + +fi + USES_CONTROLS=0 if test "$wxUSE_CONTROLS" = "yes"; then diff --git a/configure.in b/configure.in index 606bae1456..04a3e14e7b 100644 --- a/configure.in +++ b/configure.in @@ -1035,6 +1035,7 @@ WX_ARG_FEATURE(metafile, [ --enable-metafiles use wxMetaFile (Win32 onl WX_ARG_FEATURE(dragimage, [ --enable-dragimage use wxDragImage], wxUSE_DRAGIMAGE) WX_ARG_FEATURE(accessibility,[ --enable-accessibility enable accessibility support], wxUSE_ACCESSIBILITY) WX_ARG_FEATURE(uiactionsim, [ --enable-uiactionsim use wxUIActionSimulator (experimental)], wxUSE_UIACTIONSIMULATOR) +WX_ARG_FEATURE(dctransform, [ --enable-dctransform use wxDC::SetTransformMatrix and related], wxUSE_DC_TRANSFORM_MATRIX) dnl --------------------------------------------------------------------------- dnl support for image formats that do not rely on external library @@ -6752,6 +6753,10 @@ if test "$wxUSE_UIACTIONSIMULATOR" = "yes" ; then SAMPLES_SUBDIRS="$SAMPLES_SUBDIRS uiaction" fi +if test "$wxUSE_DC_TRANSFORM_MATRIX" = "yes" ; then + AC_DEFINE(wxUSE_DC_TRANSFORM_MATRIX) +fi + dnl --------------------------------------------------------------------------- dnl GUI controls dnl --------------------------------------------------------------------------- diff --git a/docs/changes.txt b/docs/changes.txt index e742a78807..3e0b49cde7 100644 --- a/docs/changes.txt +++ b/docs/changes.txt @@ -522,6 +522,7 @@ MSW: - Center task dialog-based wxProgressDialog on the parent (John Roberts). - wxAutomationObject::GetInstance() creates objects on demand (Kolya Kosenko). - Fix EVT_UPDATE_UI generation for items in submenus (wsu). +- Added support for world transformation matrix to wxDC (Catalin Raceanu). OSX: diff --git a/docs/doxygen/mainpages/const_wxusedef.h b/docs/doxygen/mainpages/const_wxusedef.h index 2367dfcde9..bb4dc79ce1 100644 --- a/docs/doxygen/mainpages/const_wxusedef.h +++ b/docs/doxygen/mainpages/const_wxusedef.h @@ -102,6 +102,7 @@ library: @itemdef{wxUSE_DATEPICKCTRL, Use wxDatePickerCtrl class.} @itemdef{wxUSE_DATETIME, Use wxDateTime and related classes.} @itemdef{wxUSE_DBGHELP, Use wxDbgHelpDLL class.} +@itemdef{wxUSE_DC_TRANSFORM_MATRIX, Use wxDC::SetTransformMatrix() and related methods.} @itemdef{wxUSE_DEBUG_CONTEXT, Use wxDebugContext class.} @itemdef{wxUSE_DEBUG_NEW_ALWAYS, See @ref overview_debugging} @itemdef{wxUSE_DEBUGREPORT, Use wxDebugReport class.} diff --git a/include/wx/chkconf.h b/include/wx/chkconf.h index fa88745fc5..4b355fc537 100644 --- a/include/wx/chkconf.h +++ b/include/wx/chkconf.h @@ -615,6 +615,14 @@ # endif #endif /* !defined(wxUSE_DATEPICKCTRL) */ +#ifndef wxUSE_DC_TRANSFORM_MATRIX +# ifdef wxABORT_ON_CONFIG_ERROR +# error "wxUSE_DC_TRANSFORM_MATRIX must be defined, please read comment near the top of this file." +# else +# define wxUSE_DC_TRANSFORM_MATRIX 1 +# endif +#endif /* wxUSE_DC_TRANSFORM_MATRIX */ + #ifndef wxUSE_DIRPICKERCTRL # ifdef wxABORT_ON_CONFIG_ERROR # error "wxUSE_DIRPICKERCTRL must be defined, please read comment near the top of this file." diff --git a/include/wx/dc.h b/include/wx/dc.h index a06217ab45..5734cde438 100644 --- a/include/wx/dc.h +++ b/include/wx/dc.h @@ -30,6 +30,7 @@ #include "wx/math.h" #include "wx/image.h" #include "wx/region.h" +#include "wx/affinematrix2d.h" #define wxUSE_NEW_DC 1 @@ -490,6 +491,20 @@ public: if ( y ) *y = m_deviceOriginY; } +#if wxUSE_DC_TRANSFORM_MATRIX + // Transform matrix support is not available in most ports right now + // (currently only wxMSW provides it) so do nothing in these methods by + // default. + virtual bool CanUseTransformMatrix() const + { return false; } + virtual bool SetTransformMatrix(const wxAffineMatrix2D& WXUNUSED(matrix)) + { return false; } + virtual wxAffineMatrix2D GetTransformMatrix() const + { return wxAffineMatrix2D(); } + virtual void ResetTransformMatrix() + { } +#endif // wxUSE_DC_TRANSFORM_MATRIX + virtual void SetDeviceLocalOrigin( wxCoord x, wxCoord y ); virtual void ComputeScaleAndOrigin(); @@ -1001,6 +1016,20 @@ public: void SetAxisOrientation(bool xLeftRight, bool yBottomUp) { m_pimpl->SetAxisOrientation(xLeftRight, yBottomUp); } +#if wxUSE_DC_TRANSFORM_MATRIX + bool CanUseTransformMatrix() const + { return m_pimpl->CanUseTransformMatrix(); } + + bool SetTransformMatrix(const wxAffineMatrix2D &matrix) + { return m_pimpl->SetTransformMatrix(matrix); } + + wxAffineMatrix2D GetTransformMatrix() const + { return m_pimpl->GetTransformMatrix(); } + + void ResetTransformMatrix() + { m_pimpl->ResetTransformMatrix(); } +#endif // wxUSE_DC_TRANSFORM_MATRIX + // mostly internal void SetDeviceLocalOrigin( wxCoord x, wxCoord y ) { m_pimpl->SetDeviceLocalOrigin( x, y ); } diff --git a/include/wx/motif/setup0.h b/include/wx/motif/setup0.h index 4f0758aa59..c5e3883fc7 100644 --- a/include/wx/motif/setup0.h +++ b/include/wx/motif/setup0.h @@ -1363,6 +1363,16 @@ // to create files in SVG (Scalable Vector Graphics) format. #define wxUSE_SVG 1 +// Should wxDC provide SetTransformMatrix() and related methods? +// +// Default is 1 but can be set to 0 if this functionality is not used. Notice +// that currently only wxMSW supports this so setting this to 0 doesn't change +// much for non-MSW platforms (although it will still save a few bytes +// probably). +// +// Recommended setting: 1. +#define wxUSE_DC_TRANSFORM_MATRIX 1 + // ---------------------------------------------------------------------------- // image format support // ---------------------------------------------------------------------------- diff --git a/include/wx/msw/chkconf.h b/include/wx/msw/chkconf.h index cff866e18a..5643870029 100644 --- a/include/wx/msw/chkconf.h +++ b/include/wx/msw/chkconf.h @@ -336,6 +336,14 @@ #endif /* !wxUSE_DYNAMIC_LOADER */ #if !wxUSE_DYNLIB_CLASS +# if wxUSE_DC_TRANSFORM_MATRIX +# ifdef wxABORT_ON_CONFIG_ERROR +# error "wxUSE_DC_TRANSFORM_MATRIX requires wxUSE_DYNLIB_CLASS" +# else +# undef wxUSE_DC_TRANSFORM_MATRIX +# define wxUSE_DC_TRANSFORM_MATRIX 0 +# endif +# endif # if wxUSE_UXTHEME # ifdef wxABORT_ON_CONFIG_ERROR # error "wxUSE_UXTHEME requires wxUSE_DYNLIB_CLASS" diff --git a/include/wx/msw/dc.h b/include/wx/msw/dc.h index b99da69a1d..f874111c8d 100644 --- a/include/wx/msw/dc.h +++ b/include/wx/msw/dc.h @@ -87,6 +87,13 @@ public: virtual void SetDeviceOrigin(wxCoord x, wxCoord y); virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp); +#if wxUSE_DC_TRANSFORM_MATRIX + virtual bool CanUseTransformMatrix() const; + virtual bool SetTransformMatrix(const wxAffineMatrix2D& matrix); + virtual wxAffineMatrix2D GetTransformMatrix() const; + virtual void ResetTransformMatrix(); +#endif // wxUSE_DC_TRANSFORM_MATRIX + virtual void SetLogicalFunction(wxRasterOperationMode function); // implementation from now on diff --git a/include/wx/msw/setup0.h b/include/wx/msw/setup0.h index 6f370d3044..896e56b3ef 100644 --- a/include/wx/msw/setup0.h +++ b/include/wx/msw/setup0.h @@ -1363,6 +1363,16 @@ // to create files in SVG (Scalable Vector Graphics) format. #define wxUSE_SVG 1 +// Should wxDC provide SetTransformMatrix() and related methods? +// +// Default is 1 but can be set to 0 if this functionality is not used. Notice +// that currently only wxMSW supports this so setting this to 0 doesn't change +// much for non-MSW platforms (although it will still save a few bytes +// probably). +// +// Recommended setting: 1. +#define wxUSE_DC_TRANSFORM_MATRIX 1 + // ---------------------------------------------------------------------------- // image format support // ---------------------------------------------------------------------------- diff --git a/include/wx/msw/wince/setup.h b/include/wx/msw/wince/setup.h index 372b9727c5..1bc89e2d7a 100644 --- a/include/wx/msw/wince/setup.h +++ b/include/wx/msw/wince/setup.h @@ -1363,6 +1363,16 @@ // to create files in SVG (Scalable Vector Graphics) format. #define wxUSE_SVG 1 +// Should wxDC provide SetTransformMatrix() and related methods? +// +// Default is 1 but can be set to 0 if this functionality is not used. Notice +// that currently only wxMSW supports this so setting this to 0 doesn't change +// much for non-MSW platforms (although it will still save a few bytes +// probably). +// +// Recommended setting: 1. +#define wxUSE_DC_TRANSFORM_MATRIX 1 + // ---------------------------------------------------------------------------- // image format support // ---------------------------------------------------------------------------- diff --git a/include/wx/os2/setup0.h b/include/wx/os2/setup0.h index 9312b3ecd5..711a8ba78a 100644 --- a/include/wx/os2/setup0.h +++ b/include/wx/os2/setup0.h @@ -1363,6 +1363,16 @@ // to create files in SVG (Scalable Vector Graphics) format. #define wxUSE_SVG 1 +// Should wxDC provide SetTransformMatrix() and related methods? +// +// Default is 1 but can be set to 0 if this functionality is not used. Notice +// that currently only wxMSW supports this so setting this to 0 doesn't change +// much for non-MSW platforms (although it will still save a few bytes +// probably). +// +// Recommended setting: 1. +#define wxUSE_DC_TRANSFORM_MATRIX 1 + // ---------------------------------------------------------------------------- // image format support // ---------------------------------------------------------------------------- diff --git a/include/wx/osx/setup0.h b/include/wx/osx/setup0.h index 28d9a18a1d..4967f7bf5b 100644 --- a/include/wx/osx/setup0.h +++ b/include/wx/osx/setup0.h @@ -1364,6 +1364,16 @@ // to create files in SVG (Scalable Vector Graphics) format. #define wxUSE_SVG 1 +// Should wxDC provide SetTransformMatrix() and related methods? +// +// Default is 1 but can be set to 0 if this functionality is not used. Notice +// that currently only wxMSW supports this so setting this to 0 doesn't change +// much for non-MSW platforms (although it will still save a few bytes +// probably). +// +// Recommended setting: 1. +#define wxUSE_DC_TRANSFORM_MATRIX 1 + // ---------------------------------------------------------------------------- // image format support // ---------------------------------------------------------------------------- diff --git a/include/wx/palmos/setup0.h b/include/wx/palmos/setup0.h index de8d5c7998..53b87abe95 100644 --- a/include/wx/palmos/setup0.h +++ b/include/wx/palmos/setup0.h @@ -1363,6 +1363,16 @@ // to create files in SVG (Scalable Vector Graphics) format. #define wxUSE_SVG 1 +// Should wxDC provide SetTransformMatrix() and related methods? +// +// Default is 1 but can be set to 0 if this functionality is not used. Notice +// that currently only wxMSW supports this so setting this to 0 doesn't change +// much for non-MSW platforms (although it will still save a few bytes +// probably). +// +// Recommended setting: 1. +#define wxUSE_DC_TRANSFORM_MATRIX 1 + // ---------------------------------------------------------------------------- // image format support // ---------------------------------------------------------------------------- diff --git a/include/wx/setup_inc.h b/include/wx/setup_inc.h index bcf7254b4f..66cb3e25d8 100644 --- a/include/wx/setup_inc.h +++ b/include/wx/setup_inc.h @@ -1359,6 +1359,16 @@ // to create files in SVG (Scalable Vector Graphics) format. #define wxUSE_SVG 1 +// Should wxDC provide SetTransformMatrix() and related methods? +// +// Default is 1 but can be set to 0 if this functionality is not used. Notice +// that currently only wxMSW supports this so setting this to 0 doesn't change +// much for non-MSW platforms (although it will still save a few bytes +// probably). +// +// Recommended setting: 1. +#define wxUSE_DC_TRANSFORM_MATRIX 1 + // ---------------------------------------------------------------------------- // image format support // ---------------------------------------------------------------------------- diff --git a/include/wx/univ/setup0.h b/include/wx/univ/setup0.h index c98489ab7d..fd37d88b06 100644 --- a/include/wx/univ/setup0.h +++ b/include/wx/univ/setup0.h @@ -1362,6 +1362,16 @@ // to create files in SVG (Scalable Vector Graphics) format. #define wxUSE_SVG 1 +// Should wxDC provide SetTransformMatrix() and related methods? +// +// Default is 1 but can be set to 0 if this functionality is not used. Notice +// that currently only wxMSW supports this so setting this to 0 doesn't change +// much for non-MSW platforms (although it will still save a few bytes +// probably). +// +// Recommended setting: 1. +#define wxUSE_DC_TRANSFORM_MATRIX 1 + // ---------------------------------------------------------------------------- // image format support // ---------------------------------------------------------------------------- diff --git a/interface/wx/dc.h b/interface/wx/dc.h index 32b986bd1e..607830fa3a 100644 --- a/interface/wx/dc.h +++ b/interface/wx/dc.h @@ -163,6 +163,17 @@ struct wxFontMetrics wxColour use the colour's alpha values when stroking or filling. + @section Support for Transformation Matrix + + On some platforms (currently only under MSW and only on Windows NT, i.e. + not Windows 9x/ME, systems) wxDC has support for applying an arbitrary + affine transformation matrix to its coordinate system. Call + CanUseTransformMatrix() to check if this support is available and then call + SetTransformMatrix() if it is. If the transformation matrix is not + supported, SetTransformMatrix() always simply returns false and doesn't do + anything. + + @library{wxcore} @category{dc,gdi} @@ -1499,6 +1510,58 @@ public: 'zooming'. */ void SetUserScale(double xScale, double yScale); + + + /** + @name Transformation matrix + + See the notes about the availability of these functions in the class + documentation. + */ + //@{ + + /** + Check if the use of transformation matrix is supported by the current + system. + + Currently this function always returns @false for non-MSW platforms and + may return @false for old (Windows 9x/ME) Windows systems. Normally + support for the transformation matrix is always available in any + relatively recent Windows versions. + + @since 2.9.2 + */ + bool CanUseTransformMatrix() const; + + /** + Set the transformation matrix. + + If transformation matrix is supported on the current system, the + specified @a matrix will be used to transform between wxDC and physical + coordinates. Otherwise the function returns @false and doesn't change + the coordinate mapping. + + @since 2.9.2 + */ + bool SetTransformMatrix(const wxAffineMatrix2D& matrix); + + /** + Return the transformation matrix used by this device context. + + By default the transformation matrix is the identity matrix. + + @since 2.9.2 + */ + wxAffineMatrix2D GetTransformMatrix() const; + + /** + Revert the transformation matrix to identity matrix. + + @since 2.9.2 + */ + void ResetTransformMatrix(); + + //@} }; diff --git a/setup.h.in b/setup.h.in index fe2e031afb..456f24fa12 100644 --- a/setup.h.in +++ b/setup.h.in @@ -573,6 +573,8 @@ #define wxUSE_SVG 0 +#define wxUSE_DC_TRANSFORM_MATRIX 0 + #define wxUSE_IMAGE 0 diff --git a/src/msw/dc.cpp b/src/msw/dc.cpp index c630843c67..5079795653 100644 --- a/src/msw/dc.cpp +++ b/src/msw/dc.cpp @@ -273,6 +273,98 @@ private: IMPLEMENT_DYNAMIC_CLASS(wxGDIDLLsCleanupModule, wxModule) +namespace +{ + +#if wxUSE_DC_TRANSFORM_MATRIX + +// Class used to dynamically load world transform related API functions. +class GdiWorldTransformFuncs +{ +public: + static bool IsOk() + { + if ( !ms_worldTransformSymbolsLoaded ) + LoadWorldTransformSymbols(); + + return ms_pfnSetGraphicsMode && + ms_pfnSetWorldTransform && + ms_pfnGetWorldTransform && + ms_pfnModifyWorldTransform; + } + + typedef int (WINAPI *SetGraphicsMode_t)(HDC, int); + static SetGraphicsMode_t SetGraphicsMode() + { + if ( !ms_worldTransformSymbolsLoaded ) + LoadWorldTransformSymbols(); + + return ms_pfnSetGraphicsMode; + } + + typedef BOOL (WINAPI *SetWorldTransform_t)(HDC, const XFORM *); + static SetWorldTransform_t SetWorldTransform() + { + if ( !ms_worldTransformSymbolsLoaded ) + LoadWorldTransformSymbols(); + + return ms_pfnSetWorldTransform; + } + + typedef BOOL (WINAPI *GetWorldTransform_t)(HDC, LPXFORM); + static GetWorldTransform_t GetWorldTransform() + { + if ( !ms_worldTransformSymbolsLoaded ) + LoadWorldTransformSymbols(); + + return ms_pfnGetWorldTransform; + } + + typedef BOOL (WINAPI *ModifyWorldTransform_t)(HDC, const XFORM *, DWORD); + static ModifyWorldTransform_t ModifyWorldTransform() + { + if ( !ms_worldTransformSymbolsLoaded ) + LoadWorldTransformSymbols(); + + return ms_pfnModifyWorldTransform; + } + +private: + static void LoadWorldTransformSymbols() + { + wxDynamicLibrary dll(wxT("gdi32.dll")); + + wxDL_INIT_FUNC(ms_pfn, SetGraphicsMode, dll); + wxDL_INIT_FUNC(ms_pfn, SetWorldTransform, dll); + wxDL_INIT_FUNC(ms_pfn, GetWorldTransform, dll); + wxDL_INIT_FUNC(ms_pfn, ModifyWorldTransform, dll); + + ms_worldTransformSymbolsLoaded = true; + } + + static SetGraphicsMode_t ms_pfnSetGraphicsMode; + static SetWorldTransform_t ms_pfnSetWorldTransform; + static GetWorldTransform_t ms_pfnGetWorldTransform; + static ModifyWorldTransform_t ms_pfnModifyWorldTransform; + + static bool ms_worldTransformSymbolsLoaded; +}; + +GdiWorldTransformFuncs::SetGraphicsMode_t + GdiWorldTransformFuncs::ms_pfnSetGraphicsMode = NULL; +GdiWorldTransformFuncs::SetWorldTransform_t + GdiWorldTransformFuncs::ms_pfnSetWorldTransform = NULL; +GdiWorldTransformFuncs::GetWorldTransform_t + GdiWorldTransformFuncs::ms_pfnGetWorldTransform = NULL; +GdiWorldTransformFuncs::ModifyWorldTransform_t + GdiWorldTransformFuncs::ms_pfnModifyWorldTransform = NULL; + +bool GdiWorldTransformFuncs::ms_worldTransformSymbolsLoaded = false; + +#endif // wxUSE_DC_TRANSFORM_MATRIX + +} // anonymous namespace + #endif // wxUSE_DYNLIB_CLASS // =========================================================================== @@ -2005,6 +2097,87 @@ void wxMSWDCImpl::SetDeviceOrigin(wxCoord x, wxCoord y) ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL); } +// ---------------------------------------------------------------------------- +// Transform matrix +// ---------------------------------------------------------------------------- + +#if wxUSE_DC_TRANSFORM_MATRIX + +bool wxMSWDCImpl::CanUseTransformMatrix() const +{ + return GdiWorldTransformFuncs::IsOk(); +} + +bool wxMSWDCImpl::SetTransformMatrix(const wxAffineMatrix2D &matrix) +{ + if ( !GdiWorldTransformFuncs::IsOk() ) + return false; + + if ( matrix.IsIdentity() ) + { + ResetTransformMatrix(); + return true; + } + + if ( !GdiWorldTransformFuncs::SetGraphicsMode()(GetHdc(), GM_ADVANCED) ) + { + wxLogLastError(wxT("SetGraphicsMode")); + return false; + } + + wxMatrix2D mat; + wxPoint2DDouble tr; + matrix.Get(&mat, &tr); + + XFORM xform; + xform.eM11 = mat.m_11; + xform.eM12 = mat.m_12; + xform.eM21 = mat.m_21; + xform.eM22 = mat.m_22; + xform.eDx = tr.m_x; + xform.eDy = tr.m_y; + + if ( !GdiWorldTransformFuncs::SetWorldTransform()(GetHdc(), &xform) ) + { + wxLogLastError(wxT("SetWorldTransform")); + return false; + } + + return true; +} + +wxAffineMatrix2D wxMSWDCImpl::GetTransformMatrix() const +{ + wxAffineMatrix2D transform; + + if ( !GdiWorldTransformFuncs::IsOk() ) + return transform; + + XFORM xform; + if ( !GdiWorldTransformFuncs::GetWorldTransform()(GetHdc(), &xform) ) + { + wxLogLastError(wxT("GetWorldTransform")); + return transform; + } + + wxMatrix2D m(xform.eM11, xform.eM12, xform.eM21, xform.eM22); + wxPoint2DDouble p(xform.eDx, xform.eDy); + transform.Set(m, p); + + return transform; +} + +void wxMSWDCImpl::ResetTransformMatrix() +{ + if ( GdiWorldTransformFuncs::IsOk() ) + { + GdiWorldTransformFuncs::ModifyWorldTransform()(GetHdc(), NULL, MWT_IDENTITY); + GdiWorldTransformFuncs::SetGraphicsMode()(GetHdc(), GM_COMPATIBLE); + } +} + +#endif // wxUSE_DC_TRANSFORM_MATRIX + // --------------------------------------------------------------------------- // bit blit // ---------------------------------------------------------------------------