658ff7f1d8
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39622 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2708 lines
77 KiB
C++
2708 lines
77 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: src/msw/dc.cpp
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// Purpose: wxDC class for MSW port
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// Author: Julian Smart
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// Modified by:
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// Created: 01/02/97
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// RCS-ID: $Id$
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// Copyright: (c) Julian Smart
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// ===========================================================================
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// declarations
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// ===========================================================================
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// ---------------------------------------------------------------------------
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// headers
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// ---------------------------------------------------------------------------
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#ifndef WX_PRECOMP
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#include "wx/image.h"
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#include "wx/window.h"
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#include "wx/dc.h"
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#include "wx/utils.h"
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#include "wx/dialog.h"
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#include "wx/app.h"
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#include "wx/bitmap.h"
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#include "wx/dcmemory.h"
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#include "wx/log.h"
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#include "wx/icon.h"
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#include "wx/dcprint.h"
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#endif
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#include "wx/sysopt.h"
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#include "wx/module.h"
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#include "wx/dynlib.h"
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#ifdef wxHAVE_RAW_BITMAP
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#include "wx/rawbmp.h"
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#endif
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#include <string.h>
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#include "wx/msw/wrapcdlg.h"
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#ifndef __WIN32__
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#include <print.h>
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#endif
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#ifndef AC_SRC_ALPHA
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#define AC_SRC_ALPHA 1
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#endif
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/* Quaternary raster codes */
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#ifndef MAKEROP4
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#define MAKEROP4(fore,back) (DWORD)((((back) << 8) & 0xFF000000) | (fore))
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#endif
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// apparently with MicroWindows it is possible that HDC is 0 so we have to
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// check for this ourselves
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#ifdef __WXMICROWIN__
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#define WXMICROWIN_CHECK_HDC if ( !GetHDC() ) return;
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#define WXMICROWIN_CHECK_HDC_RET(x) if ( !GetHDC() ) return x;
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#else
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#define WXMICROWIN_CHECK_HDC
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#define WXMICROWIN_CHECK_HDC_RET(x)
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#endif
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IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase)
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// ---------------------------------------------------------------------------
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// constants
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// ---------------------------------------------------------------------------
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static const int VIEWPORT_EXTENT = 1000;
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static const int MM_POINTS = 9;
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static const int MM_METRIC = 10;
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// ROPs which don't have standard names (see "Ternary Raster Operations" in the
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// MSDN docs for how this and other numbers in wxDC::Blit() are obtained)
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#define DSTCOPY 0x00AA0029 // a.k.a. NOP operation
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// ----------------------------------------------------------------------------
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// macros for logical <-> device coords conversion
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// ----------------------------------------------------------------------------
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/*
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We currently let Windows do all the translations itself so these macros are
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not really needed (any more) but keep them to enhance readability of the
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code by allowing to see where are the logical and where are the device
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coordinates used.
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*/
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#ifdef __WXWINCE__
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#define XLOG2DEV(x) ((x-m_logicalOriginX)*m_signX)
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#define YLOG2DEV(y) ((y-m_logicalOriginY)*m_signY)
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#define XDEV2LOG(x) ((x)*m_signX+m_logicalOriginX)
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#define YDEV2LOG(y) ((y)*m_signY+m_logicalOriginY)
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#else
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#define XLOG2DEV(x) (x)
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#define YLOG2DEV(y) (y)
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#define XDEV2LOG(x) (x)
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#define YDEV2LOG(y) (y)
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#endif
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// ---------------------------------------------------------------------------
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// private functions
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// ---------------------------------------------------------------------------
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// convert degrees to radians
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static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
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// call AlphaBlend() to blit contents of hdcSrc to hdcDst using alpha
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//
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// NB: bmpSrc is the bitmap selected in hdcSrc, it is not really needed
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// to pass it to this function but as we already have it at the point
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// of call anyhow we do
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//
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// return true if we could draw the bitmap in one way or the other, false
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// otherwise
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static bool AlphaBlt(HDC hdcDst,
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int x, int y, int w, int h,
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int srcX, int srcY, HDC hdcSrc,
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const wxBitmap& bmpSrc);
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#ifdef wxHAVE_RAW_BITMAP
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// our (limited) AlphaBlend() replacement for Windows versions not providing it
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static void
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wxAlphaBlend(HDC hdcDst, int x, int y, int w, int h,
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int srcX, int srcY, const wxBitmap& bmp);
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#endif // wxHAVE_RAW_BITMAP
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// ----------------------------------------------------------------------------
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// private classes
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// ----------------------------------------------------------------------------
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// instead of duplicating the same code which sets and then restores text
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// colours in each wxDC method working with wxSTIPPLE_MASK_OPAQUE brushes,
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// encapsulate this in a small helper class
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// wxColourChanger: changes the text colours in the ctor if required and
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// restores them in the dtor
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class wxColourChanger
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{
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public:
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wxColourChanger(wxDC& dc);
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~wxColourChanger();
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private:
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wxDC& m_dc;
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COLORREF m_colFgOld, m_colBgOld;
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bool m_changed;
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DECLARE_NO_COPY_CLASS(wxColourChanger)
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};
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// this class saves the old stretch blit mode during its life time
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class StretchBltModeChanger
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{
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public:
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StretchBltModeChanger(HDC hdc,
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int WXUNUSED_IN_WINCE(mode))
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: m_hdc(hdc)
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{
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#ifndef __WXWINCE__
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m_modeOld = ::SetStretchBltMode(m_hdc, mode);
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if ( !m_modeOld )
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wxLogLastError(_T("SetStretchBltMode"));
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#endif
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}
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~StretchBltModeChanger()
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{
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#ifndef __WXWINCE__
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if ( !::SetStretchBltMode(m_hdc, m_modeOld) )
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wxLogLastError(_T("SetStretchBltMode"));
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#endif
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}
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private:
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const HDC m_hdc;
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int m_modeOld;
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DECLARE_NO_COPY_CLASS(StretchBltModeChanger)
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};
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// support for dynamic loading of msimg32.dll which we use for some functions
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class wxMSImg32DLL
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{
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public:
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// return the symbol with the given name if the DLL not loaded or symbol
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// not present
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static void *GetSymbol(const wxChar *name)
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{
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wxLogNull noLog;
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if ( !ms_triedToLoad )
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{
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ms_triedToLoad = true;
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ms_dll.Load(_T("msimg32"));
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}
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return ms_dll.IsLoaded() ? ms_dll.GetSymbol(name) : NULL;
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}
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private:
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static wxDynamicLibrary ms_dll;
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static bool ms_triedToLoad;
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};
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wxDynamicLibrary wxMSImg32DLL::ms_dll;
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bool wxMSImg32DLL::ms_triedToLoad = false;
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// helper macro for getting the symbols from msimg32.dll: it supposes that a
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// type "name_t" is defined and casts the returned symbol to it automatically
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#define wxMSIMG32_SYMBOL(name) (name ## _t)wxMSImg32DLL::GetSymbol(_T(#name))
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// ===========================================================================
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// implementation
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// ===========================================================================
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// ----------------------------------------------------------------------------
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// wxColourChanger
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// ----------------------------------------------------------------------------
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wxColourChanger::wxColourChanger(wxDC& dc) : m_dc(dc)
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{
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const wxBrush& brush = dc.GetBrush();
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if ( brush.Ok() && brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
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{
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HDC hdc = GetHdcOf(dc);
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m_colFgOld = ::GetTextColor(hdc);
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m_colBgOld = ::GetBkColor(hdc);
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// note that Windows convention is opposite to wxWidgets one, this is
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// why text colour becomes the background one and vice versa
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const wxColour& colFg = dc.GetTextForeground();
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if ( colFg.Ok() )
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{
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::SetBkColor(hdc, colFg.GetPixel());
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}
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const wxColour& colBg = dc.GetTextBackground();
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if ( colBg.Ok() )
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{
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::SetTextColor(hdc, colBg.GetPixel());
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}
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SetBkMode(hdc,
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dc.GetBackgroundMode() == wxTRANSPARENT ? TRANSPARENT
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: OPAQUE);
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// flag which telsl us to undo changes in the dtor
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m_changed = true;
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}
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else
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{
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// nothing done, nothing to undo
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m_changed = false;
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}
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}
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wxColourChanger::~wxColourChanger()
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{
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if ( m_changed )
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{
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// restore the colours we changed
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HDC hdc = GetHdcOf(m_dc);
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::SetBkMode(hdc, TRANSPARENT);
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::SetTextColor(hdc, m_colFgOld);
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::SetBkColor(hdc, m_colBgOld);
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}
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}
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// ---------------------------------------------------------------------------
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// wxDC
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// ---------------------------------------------------------------------------
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wxDC::~wxDC()
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{
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if ( m_hDC != 0 )
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{
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SelectOldObjects(m_hDC);
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// if we own the HDC, we delete it, otherwise we just release it
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if ( m_bOwnsDC )
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{
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::DeleteDC(GetHdc());
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}
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else // we don't own our HDC
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{
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if (m_canvas)
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{
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::ReleaseDC(GetHwndOf(m_canvas), GetHdc());
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}
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else
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{
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// Must have been a wxScreenDC
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::ReleaseDC((HWND) NULL, GetHdc());
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}
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}
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}
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}
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// This will select current objects out of the DC,
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// which is what you have to do before deleting the
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// DC.
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void wxDC::SelectOldObjects(WXHDC dc)
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{
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if (dc)
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{
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if (m_oldBitmap)
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{
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::SelectObject((HDC) dc, (HBITMAP) m_oldBitmap);
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#ifdef __WXDEBUG__
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if (m_selectedBitmap.Ok())
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{
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m_selectedBitmap.SetSelectedInto(NULL);
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}
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#endif
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}
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m_oldBitmap = 0;
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if (m_oldPen)
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{
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::SelectObject((HDC) dc, (HPEN) m_oldPen);
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}
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m_oldPen = 0;
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if (m_oldBrush)
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{
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::SelectObject((HDC) dc, (HBRUSH) m_oldBrush);
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}
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m_oldBrush = 0;
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if (m_oldFont)
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{
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::SelectObject((HDC) dc, (HFONT) m_oldFont);
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}
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m_oldFont = 0;
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#if wxUSE_PALETTE
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if (m_oldPalette)
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{
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::SelectPalette((HDC) dc, (HPALETTE) m_oldPalette, FALSE);
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}
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m_oldPalette = 0;
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#endif // wxUSE_PALETTE
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}
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m_brush = wxNullBrush;
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m_pen = wxNullPen;
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#if wxUSE_PALETTE
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m_palette = wxNullPalette;
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#endif // wxUSE_PALETTE
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m_font = wxNullFont;
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m_backgroundBrush = wxNullBrush;
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m_selectedBitmap = wxNullBitmap;
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}
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// ---------------------------------------------------------------------------
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// clipping
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// ---------------------------------------------------------------------------
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void wxDC::UpdateClipBox()
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{
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WXMICROWIN_CHECK_HDC
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RECT rect;
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::GetClipBox(GetHdc(), &rect);
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m_clipX1 = (wxCoord) XDEV2LOG(rect.left);
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m_clipY1 = (wxCoord) YDEV2LOG(rect.top);
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m_clipX2 = (wxCoord) XDEV2LOG(rect.right);
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m_clipY2 = (wxCoord) YDEV2LOG(rect.bottom);
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}
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void
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wxDC::DoGetClippingBox(wxCoord *x, wxCoord *y, wxCoord *w, wxCoord *h) const
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{
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// check if we should try to retrieve the clipping region possibly not set
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// by our SetClippingRegion() but preset by Windows:this can only happen
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// when we're associated with an existing HDC usign SetHDC(), see there
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if ( m_clipping && !m_clipX1 && !m_clipX2 )
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{
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wxDC *self = wxConstCast(this, wxDC);
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self->UpdateClipBox();
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if ( !m_clipX1 && !m_clipX2 )
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self->m_clipping = false;
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}
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wxDCBase::DoGetClippingBox(x, y, w, h);
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}
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// common part of DoSetClippingRegion() and DoSetClippingRegionAsRegion()
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void wxDC::SetClippingHrgn(WXHRGN hrgn)
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{
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wxCHECK_RET( hrgn, wxT("invalid clipping region") );
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WXMICROWIN_CHECK_HDC
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// note that we combine the new clipping region with the existing one: this
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// is compatible with what the other ports do and is the documented
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// behaviour now (starting with 2.3.3)
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#if defined(__WXWINCE__)
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RECT rectClip;
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if ( !::GetClipBox(GetHdc(), &rectClip) )
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return;
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|
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// GetClipBox returns logical coordinates, so transform to device
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rectClip.left = LogicalToDeviceX(rectClip.left);
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rectClip.top = LogicalToDeviceY(rectClip.top);
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rectClip.right = LogicalToDeviceX(rectClip.right);
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rectClip.bottom = LogicalToDeviceY(rectClip.bottom);
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HRGN hrgnDest = ::CreateRectRgn(0, 0, 0, 0);
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HRGN hrgnClipOld = ::CreateRectRgn(rectClip.left, rectClip.top,
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rectClip.right, rectClip.bottom);
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if ( ::CombineRgn(hrgnDest, hrgnClipOld, (HRGN)hrgn, RGN_AND) != ERROR )
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{
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::SelectClipRgn(GetHdc(), hrgnDest);
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}
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::DeleteObject(hrgnClipOld);
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::DeleteObject(hrgnDest);
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#else // !WinCE
|
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if ( ::ExtSelectClipRgn(GetHdc(), (HRGN)hrgn, RGN_AND) == ERROR )
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{
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wxLogLastError(_T("ExtSelectClipRgn"));
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|
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return;
|
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}
|
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#endif // WinCE/!WinCE
|
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|
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m_clipping = true;
|
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|
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UpdateClipBox();
|
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}
|
||
|
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void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
|
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{
|
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// the region coords are always the device ones, so do the translation
|
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// manually
|
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//
|
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// FIXME: possible +/-1 error here, to check!
|
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HRGN hrgn = ::CreateRectRgn(LogicalToDeviceX(x),
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LogicalToDeviceY(y),
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LogicalToDeviceX(x + w),
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LogicalToDeviceY(y + h));
|
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if ( !hrgn )
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{
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wxLogLastError(_T("CreateRectRgn"));
|
||
}
|
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else
|
||
{
|
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SetClippingHrgn((WXHRGN)hrgn);
|
||
|
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::DeleteObject(hrgn);
|
||
}
|
||
}
|
||
|
||
void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
|
||
{
|
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SetClippingHrgn(region.GetHRGN());
|
||
}
|
||
|
||
void wxDC::DestroyClippingRegion()
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
if (m_clipping && m_hDC)
|
||
{
|
||
#if 1
|
||
// On a PocketPC device (not necessarily emulator), resetting
|
||
// the clip region as per the old method causes bad display
|
||
// problems. In fact setting a null region is probably OK
|
||
// on desktop WIN32 also, since the WIN32 docs imply that the user
|
||
// clipping region is independent from the paint clipping region.
|
||
::SelectClipRgn(GetHdc(), 0);
|
||
#else
|
||
// 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);
|
||
#endif
|
||
}
|
||
|
||
wxDCBase::DestroyClippingRegion();
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// query capabilities
|
||
// ---------------------------------------------------------------------------
|
||
|
||
bool wxDC::CanDrawBitmap() const
|
||
{
|
||
return true;
|
||
}
|
||
|
||
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);
|
||
|
||
return (technology == DT_RASDISPLAY) || (technology == DT_RASPRINTER);
|
||
#endif
|
||
}
|
||
|
||
int wxDC::GetDepth() const
|
||
{
|
||
WXMICROWIN_CHECK_HDC_RET(16)
|
||
|
||
return (int)::GetDeviceCaps(GetHdc(), BITSPIXEL);
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// drawing
|
||
// ---------------------------------------------------------------------------
|
||
|
||
void wxDC::Clear()
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
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();
|
||
}
|
||
|
||
#ifndef __WXWINCE__
|
||
(void) ::SetMapMode(GetHdc(), MM_TEXT);
|
||
#endif
|
||
|
||
DWORD colour = ::GetBkColor(GetHdc());
|
||
HBRUSH brush = ::CreateSolidBrush(colour);
|
||
::FillRect(GetHdc(), &rect, brush);
|
||
::DeleteObject(brush);
|
||
|
||
#ifndef __WXWINCE__
|
||
int width = DeviceToLogicalXRel(VIEWPORT_EXTENT)*m_signX,
|
||
height = DeviceToLogicalYRel(VIEWPORT_EXTENT)*m_signY;
|
||
|
||
::SetMapMode(GetHdc(), MM_ANISOTROPIC);
|
||
|
||
::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::DoFloodFill(wxCoord WXUNUSED_IN_WINCE(x),
|
||
wxCoord WXUNUSED_IN_WINCE(y),
|
||
const wxColour& WXUNUSED_IN_WINCE(col),
|
||
int WXUNUSED_IN_WINCE(style))
|
||
{
|
||
#ifdef __WXWINCE__
|
||
return false;
|
||
#else
|
||
WXMICROWIN_CHECK_HDC_RET(false)
|
||
|
||
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
|
||
}
|
||
|
||
bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
|
||
{
|
||
WXMICROWIN_CHECK_HDC_RET(false)
|
||
|
||
wxCHECK_MSG( col, false, _T("NULL colour parameter in wxDC::GetPixel") );
|
||
|
||
// get the color of the pixel
|
||
COLORREF pixelcolor = ::GetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y));
|
||
|
||
wxRGBToColour(*col, pixelcolor);
|
||
|
||
return true;
|
||
}
|
||
|
||
void wxDC::DoCrossHair(wxCoord x, wxCoord y)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
wxCoord x1 = x-VIEWPORT_EXTENT;
|
||
wxCoord y1 = y-VIEWPORT_EXTENT;
|
||
wxCoord x2 = x+VIEWPORT_EXTENT;
|
||
wxCoord y2 = y+VIEWPORT_EXTENT;
|
||
|
||
wxDrawLine(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y));
|
||
wxDrawLine(GetHdc(), XLOG2DEV(x), YLOG2DEV(y1), XLOG2DEV(x), YLOG2DEV(y2));
|
||
|
||
CalcBoundingBox(x1, y1);
|
||
CalcBoundingBox(x2, y2);
|
||
}
|
||
|
||
void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
wxDrawLine(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y1), XLOG2DEV(x2), YLOG2DEV(y2));
|
||
|
||
CalcBoundingBox(x1, y1);
|
||
CalcBoundingBox(x2, y2);
|
||
}
|
||
|
||
// 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)
|
||
{
|
||
#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
|
||
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
|
||
|
||
double dx = xc - x1;
|
||
double dy = yc - y1;
|
||
double radius = (double)sqrt(dx*dx+dy*dy);
|
||
wxCoord r = (wxCoord)radius;
|
||
|
||
// treat the special case of full circle separately
|
||
if ( x1 == x2 && y1 == y2 )
|
||
{
|
||
DrawEllipse(xc - r, yc - r, 2*r, 2*r);
|
||
return;
|
||
}
|
||
|
||
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)));
|
||
|
||
wxCoord xxx1 = (wxCoord) (xxc-ray);
|
||
wxCoord yyy1 = (wxCoord) (yyc-ray);
|
||
wxCoord xxx2 = (wxCoord) (xxc+ray);
|
||
wxCoord yyy2 = (wxCoord) (yyc+ray);
|
||
|
||
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(xc - r, yc - r);
|
||
CalcBoundingBox(xc + r, yc + r);
|
||
#endif
|
||
}
|
||
|
||
void wxDC::DoDrawCheckMark(wxCoord x1, wxCoord y1,
|
||
wxCoord width, wxCoord height)
|
||
{
|
||
// cases when we don't have DrawFrameControl()
|
||
#if defined(__SYMANTEC__) || defined(__WXMICROWIN__)
|
||
return wxDCBase::DoDrawCheckMark(x1, y1, width, height);
|
||
#else // normal case
|
||
wxCoord x2 = x1 + width,
|
||
y2 = y1 + height;
|
||
|
||
RECT rect;
|
||
rect.left = x1;
|
||
rect.top = y1;
|
||
rect.right = x2;
|
||
rect.bottom = y2;
|
||
|
||
#ifdef __WXWINCE__
|
||
DrawFrameControl(GetHdc(), &rect, DFC_BUTTON, DFCS_BUTTONCHECK);
|
||
#else
|
||
DrawFrameControl(GetHdc(), &rect, DFC_MENU, DFCS_MENUCHECK);
|
||
#endif
|
||
|
||
CalcBoundingBox(x1, y1);
|
||
CalcBoundingBox(x2, y2);
|
||
#endif // Microwin/Normal
|
||
}
|
||
|
||
void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
COLORREF color = 0x00ffffff;
|
||
if (m_pen.Ok())
|
||
{
|
||
color = m_pen.GetColour().GetPixel();
|
||
}
|
||
|
||
SetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), color);
|
||
|
||
CalcBoundingBox(x, y);
|
||
}
|
||
|
||
void wxDC::DoDrawPolygon(int n,
|
||
wxPoint points[],
|
||
wxCoord xoffset,
|
||
wxCoord yoffset,
|
||
int WXUNUSED_IN_WINCE(fillStyle))
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
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);
|
||
|
||
#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::DoDrawPolyPolygon(int n,
|
||
int count[],
|
||
wxPoint points[],
|
||
wxCoord xoffset,
|
||
wxCoord yoffset,
|
||
int fillStyle)
|
||
{
|
||
#ifdef __WXWINCE__
|
||
wxDCBase::DoDrawPolyPolygon(n, count, points, xoffset, yoffset, fillStyle);
|
||
#else
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
|
||
int i, cnt;
|
||
for (i = cnt = 0; i < n; i++)
|
||
cnt += count[i];
|
||
|
||
// Do things less efficiently if we have offsets
|
||
if (xoffset != 0 || yoffset != 0)
|
||
{
|
||
POINT *cpoints = new POINT[cnt];
|
||
for (i = 0; i < cnt; 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)PolyPolygon(GetHdc(), cpoints, count, n);
|
||
#ifndef __WXWINCE__
|
||
SetPolyFillMode(GetHdc(),prev);
|
||
#endif
|
||
delete[] cpoints;
|
||
}
|
||
else
|
||
{
|
||
for (i = 0; i < cnt; i++)
|
||
CalcBoundingBox(points[i].x, points[i].y);
|
||
|
||
#ifndef __WXWINCE__
|
||
int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
|
||
#endif
|
||
(void)PolyPolygon(GetHdc(), (POINT*) points, count, n);
|
||
#ifndef __WXWINCE__
|
||
SetPolyFillMode(GetHdc(),prev);
|
||
#endif
|
||
}
|
||
#endif
|
||
// __WXWINCE__
|
||
}
|
||
|
||
void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
// 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);
|
||
|
||
(void)Polyline(GetHdc(), (POINT*) points, n);
|
||
}
|
||
}
|
||
|
||
void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
|
||
|
||
wxCoord x2 = x + width;
|
||
wxCoord y2 = y + height;
|
||
|
||
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<64>t be done after the LOG2DEV() conversions. RR.
|
||
if ( m_pen.GetStyle() == wxTRANSPARENT )
|
||
{
|
||
// Apparently not needed for WinCE (see e.g. Life! demo)
|
||
#ifndef __WXWINCE__
|
||
x2++;
|
||
y2++;
|
||
#endif
|
||
}
|
||
|
||
(void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
|
||
}
|
||
|
||
|
||
CalcBoundingBox(x, y);
|
||
CalcBoundingBox(x2, y2);
|
||
}
|
||
|
||
void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
|
||
|
||
// Now, a negative radius value is interpreted to mean
|
||
// 'the proportion of the smallest X or Y dimension'
|
||
|
||
if (radius < 0.0)
|
||
{
|
||
double smallest = (width < height) ? width : height;
|
||
radius = (- radius * smallest);
|
||
}
|
||
|
||
wxCoord x2 = (x+width);
|
||
wxCoord y2 = (y+height);
|
||
|
||
// 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++;
|
||
}
|
||
|
||
(void)RoundRect(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2),
|
||
YLOG2DEV(y2), (int) (2*XLOG2DEV(radius)), (int)( 2*YLOG2DEV(radius)));
|
||
|
||
CalcBoundingBox(x, y);
|
||
CalcBoundingBox(x2, y2);
|
||
}
|
||
|
||
void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
|
||
|
||
wxCoord x2 = (x+width);
|
||
wxCoord y2 = (y+height);
|
||
|
||
(void)Ellipse(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
|
||
|
||
CalcBoundingBox(x, y);
|
||
CalcBoundingBox(x2, y2);
|
||
}
|
||
|
||
#if wxUSE_SPLINES
|
||
void wxDC::DoDrawSpline(wxList *points)
|
||
{
|
||
#ifdef __WXWINCE__
|
||
// WinCE does not support ::PolyBezier so use generic version
|
||
wxDCBase::DoDrawSpline(points);
|
||
#else
|
||
// quadratic b-spline to cubic bezier spline conversion
|
||
//
|
||
// quadratic spline with control points P0,P1,P2
|
||
// P(s) = P0*(1-s)^2 + P1*2*(1-s)*s + P2*s^2
|
||
//
|
||
// bezier spline with control points B0,B1,B2,B3
|
||
// B(s) = B0*(1-s)^3 + B1*3*(1-s)^2*s + B2*3*(1-s)*s^2 + B3*s^3
|
||
//
|
||
// control points of bezier spline calculated from b-spline
|
||
// B0 = P0
|
||
// B1 = (2*P1 + P0)/3
|
||
// B2 = (2*P1 + P2)/3
|
||
// B3 = P2
|
||
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
wxASSERT_MSG( points, wxT("NULL pointer to spline points?") );
|
||
|
||
const size_t n_points = points->GetCount();
|
||
wxASSERT_MSG( n_points > 2 , wxT("incomplete list of spline points?") );
|
||
|
||
const size_t n_bezier_points = n_points * 3 + 1;
|
||
POINT *lppt = (POINT *)malloc(n_bezier_points*sizeof(POINT));
|
||
size_t bezier_pos = 0;
|
||
wxCoord x1, y1, x2, y2, cx1, cy1, cx4, cy4;
|
||
|
||
wxList::compatibility_iterator node = points->GetFirst();
|
||
wxPoint *p = (wxPoint *)node->GetData();
|
||
lppt[ bezier_pos ].x = x1 = p->x;
|
||
lppt[ bezier_pos ].y = y1 = p->y;
|
||
bezier_pos++;
|
||
lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];
|
||
bezier_pos++;
|
||
|
||
node = node->GetNext();
|
||
p = (wxPoint *)node->GetData();
|
||
|
||
x2 = p->x;
|
||
y2 = p->y;
|
||
cx1 = ( x1 + x2 ) / 2;
|
||
cy1 = ( y1 + y2 ) / 2;
|
||
lppt[ bezier_pos ].x = XLOG2DEV(cx1);
|
||
lppt[ bezier_pos ].y = YLOG2DEV(cy1);
|
||
bezier_pos++;
|
||
lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];
|
||
bezier_pos++;
|
||
|
||
#if !wxUSE_STL
|
||
while ((node = node->GetNext()) != NULL)
|
||
#else
|
||
while ((node = node->GetNext()))
|
||
#endif // !wxUSE_STL
|
||
{
|
||
p = (wxPoint *)node->GetData();
|
||
x1 = x2;
|
||
y1 = y2;
|
||
x2 = p->x;
|
||
y2 = p->y;
|
||
cx4 = (x1 + x2) / 2;
|
||
cy4 = (y1 + y2) / 2;
|
||
// B0 is B3 of previous segment
|
||
// B1:
|
||
lppt[ bezier_pos ].x = XLOG2DEV((x1*2+cx1)/3);
|
||
lppt[ bezier_pos ].y = YLOG2DEV((y1*2+cy1)/3);
|
||
bezier_pos++;
|
||
// B2:
|
||
lppt[ bezier_pos ].x = XLOG2DEV((x1*2+cx4)/3);
|
||
lppt[ bezier_pos ].y = YLOG2DEV((y1*2+cy4)/3);
|
||
bezier_pos++;
|
||
// B3:
|
||
lppt[ bezier_pos ].x = XLOG2DEV(cx4);
|
||
lppt[ bezier_pos ].y = YLOG2DEV(cy4);
|
||
bezier_pos++;
|
||
cx1 = cx4;
|
||
cy1 = cy4;
|
||
}
|
||
|
||
lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];
|
||
bezier_pos++;
|
||
lppt[ bezier_pos ].x = XLOG2DEV(x2);
|
||
lppt[ bezier_pos ].y = YLOG2DEV(y2);
|
||
bezier_pos++;
|
||
lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];
|
||
bezier_pos++;
|
||
|
||
::PolyBezier( GetHdc(), lppt, bezier_pos );
|
||
|
||
free(lppt);
|
||
#endif
|
||
}
|
||
#endif
|
||
|
||
// 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
|
||
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
|
||
|
||
wxCoord x2 = x + w;
|
||
wxCoord y2 = y + h;
|
||
|
||
int rx1 = XLOG2DEV(x+w/2);
|
||
int ry1 = YLOG2DEV(y+h/2);
|
||
int rx2 = rx1;
|
||
int ry2 = ry1;
|
||
|
||
sa = DegToRad(sa);
|
||
ea = DegToRad(ea);
|
||
|
||
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
|
||
{
|
||
(void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)-1, XLOG2DEV(x2)+1, YLOG2DEV(y2),
|
||
rx1, ry1-1, rx2, ry2-1);
|
||
}
|
||
|
||
::SelectObject(GetHdc(), hpenOld);
|
||
|
||
(void)Arc(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2),
|
||
rx1, ry1, rx2, ry2);
|
||
|
||
CalcBoundingBox(x, y);
|
||
CalcBoundingBox(x2, y2);
|
||
#endif
|
||
}
|
||
|
||
void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
wxCHECK_RET( icon.Ok(), wxT("invalid icon in DrawIcon") );
|
||
|
||
#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
|
||
|
||
CalcBoundingBox(x, y);
|
||
CalcBoundingBox(x + icon.GetWidth(), y + icon.GetHeight());
|
||
}
|
||
|
||
void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask )
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
wxCHECK_RET( bmp.Ok(), _T("invalid bitmap in wxDC::DrawBitmap") );
|
||
|
||
int width = bmp.GetWidth(),
|
||
height = bmp.GetHeight();
|
||
|
||
HBITMAP hbmpMask = 0;
|
||
|
||
#if wxUSE_PALETTE
|
||
HPALETTE oldPal = 0;
|
||
#endif // wxUSE_PALETTE
|
||
|
||
if ( bmp.HasAlpha() )
|
||
{
|
||
MemoryHDC hdcMem;
|
||
SelectInHDC select(hdcMem, GetHbitmapOf(bmp));
|
||
|
||
if ( AlphaBlt(GetHdc(), x, y, width, height, 0, 0, hdcMem, bmp) )
|
||
return;
|
||
}
|
||
|
||
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 wxWidgets 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::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
DrawAnyText(text, x, y);
|
||
|
||
// update the bounding box
|
||
CalcBoundingBox(x, y);
|
||
|
||
wxCoord w, h;
|
||
GetTextExtent(text, &w, &h);
|
||
CalcBoundingBox(x + w, y + h);
|
||
}
|
||
|
||
void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
// prepare for drawing the text
|
||
if ( m_textForegroundColour.Ok() )
|
||
SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
|
||
|
||
DWORD old_background = 0;
|
||
if ( m_textBackgroundColour.Ok() )
|
||
{
|
||
old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
|
||
}
|
||
|
||
SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
|
||
: OPAQUE);
|
||
|
||
#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
|
||
|
||
// 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);
|
||
|
||
SetBkMode(GetHdc(), TRANSPARENT);
|
||
}
|
||
|
||
void wxDC::DoDrawRotatedText(const wxString& text,
|
||
wxCoord x, wxCoord y,
|
||
double angle)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
// 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() )
|
||
{
|
||
DoDrawText(text, x, y);
|
||
}
|
||
#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(w*sin(rad)));
|
||
|
||
// "bottom left" and "bottom right"
|
||
x += (wxCoord)(h*sin(rad));
|
||
y += (wxCoord)(h*cos(rad));
|
||
CalcBoundingBox(x, y);
|
||
CalcBoundingBox(x + wxCoord(w*cos(rad)), y - wxCoord(w*sin(rad)));
|
||
}
|
||
#endif
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// set GDI objects
|
||
// ---------------------------------------------------------------------------
|
||
|
||
#if wxUSE_PALETTE
|
||
|
||
void wxDC::DoSelectPalette(bool realize)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
// 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_palette.Ok() )
|
||
{
|
||
HPALETTE oldPal = ::SelectPalette(GetHdc(),
|
||
GetHpaletteOf(m_palette),
|
||
false);
|
||
if (!m_oldPalette)
|
||
m_oldPalette = (WXHPALETTE) oldPal;
|
||
|
||
if (realize)
|
||
::RealizePalette(GetHdc());
|
||
}
|
||
}
|
||
|
||
void wxDC::SetPalette(const wxPalette& palette)
|
||
{
|
||
if ( palette.Ok() )
|
||
{
|
||
m_palette = palette;
|
||
DoSelectPalette(true);
|
||
}
|
||
}
|
||
|
||
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();
|
||
}
|
||
}
|
||
}
|
||
|
||
#endif // wxUSE_PALETTE
|
||
|
||
// SetFont/Pen/Brush() really ask to be implemented as a single template
|
||
// function... but doing it is not worth breaking OpenWatcom build <sigh>
|
||
|
||
void wxDC::SetFont(const wxFont& font)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
if ( font == m_font )
|
||
return;
|
||
|
||
if ( font.Ok() )
|
||
{
|
||
HGDIOBJ hfont = ::SelectObject(GetHdc(), GetHfontOf(font));
|
||
if ( hfont == HGDI_ERROR )
|
||
{
|
||
wxLogLastError(_T("SelectObject(font)"));
|
||
}
|
||
else // selected ok
|
||
{
|
||
if ( !m_oldFont )
|
||
m_oldFont = (WXHFONT)hfont;
|
||
|
||
m_font = font;
|
||
}
|
||
}
|
||
else // invalid font, reset the current font
|
||
{
|
||
if ( m_oldFont )
|
||
{
|
||
if ( ::SelectObject(GetHdc(), (HPEN) m_oldFont) == HGDI_ERROR )
|
||
{
|
||
wxLogLastError(_T("SelectObject(old font)"));
|
||
}
|
||
|
||
m_oldFont = 0;
|
||
}
|
||
|
||
m_font = wxNullFont;
|
||
}
|
||
}
|
||
|
||
void wxDC::SetPen(const wxPen& pen)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
if ( pen == m_pen )
|
||
return;
|
||
|
||
if ( pen.Ok() )
|
||
{
|
||
HGDIOBJ hpen = ::SelectObject(GetHdc(), GetHpenOf(pen));
|
||
if ( hpen == HGDI_ERROR )
|
||
{
|
||
wxLogLastError(_T("SelectObject(pen)"));
|
||
}
|
||
else // selected ok
|
||
{
|
||
if ( !m_oldPen )
|
||
m_oldPen = (WXHPEN)hpen;
|
||
|
||
m_pen = pen;
|
||
}
|
||
}
|
||
else // invalid pen, reset the current pen
|
||
{
|
||
if ( m_oldPen )
|
||
{
|
||
if ( ::SelectObject(GetHdc(), (HPEN) m_oldPen) == HGDI_ERROR )
|
||
{
|
||
wxLogLastError(_T("SelectObject(old pen)"));
|
||
}
|
||
|
||
m_oldPen = 0;
|
||
}
|
||
|
||
m_pen = wxNullPen;
|
||
}
|
||
}
|
||
|
||
void wxDC::SetBrush(const wxBrush& brush)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
if ( brush == m_brush )
|
||
return;
|
||
|
||
if ( brush.Ok() )
|
||
{
|
||
// we must make sure the brush is aligned with the logical coordinates
|
||
// before selecting it
|
||
wxBitmap *stipple = brush.GetStipple();
|
||
if ( stipple && stipple->Ok() )
|
||
{
|
||
if ( !::SetBrushOrgEx
|
||
(
|
||
GetHdc(),
|
||
m_deviceOriginX % stipple->GetWidth(),
|
||
m_deviceOriginY % stipple->GetHeight(),
|
||
NULL // [out] previous brush origin
|
||
) )
|
||
{
|
||
wxLogLastError(_T("SetBrushOrgEx()"));
|
||
}
|
||
}
|
||
|
||
HGDIOBJ hbrush = ::SelectObject(GetHdc(), GetHbrushOf(brush));
|
||
if ( hbrush == HGDI_ERROR )
|
||
{
|
||
wxLogLastError(_T("SelectObject(brush)"));
|
||
}
|
||
else // selected ok
|
||
{
|
||
if ( !m_oldBrush )
|
||
m_oldBrush = (WXHBRUSH)hbrush;
|
||
|
||
m_brush = brush;
|
||
}
|
||
}
|
||
else // invalid brush, reset the current brush
|
||
{
|
||
if ( m_oldBrush )
|
||
{
|
||
if ( ::SelectObject(GetHdc(), (HPEN) m_oldBrush) == HGDI_ERROR )
|
||
{
|
||
wxLogLastError(_T("SelectObject(old brush)"));
|
||
}
|
||
|
||
m_oldBrush = 0;
|
||
}
|
||
|
||
m_brush = wxNullBrush;
|
||
}
|
||
}
|
||
|
||
void wxDC::SetBackground(const wxBrush& brush)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
m_backgroundBrush = brush;
|
||
|
||
if ( m_backgroundBrush.Ok() )
|
||
{
|
||
(void)SetBkColor(GetHdc(), m_backgroundBrush.GetColour().GetPixel());
|
||
}
|
||
}
|
||
|
||
void wxDC::SetBackgroundMode(int mode)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
m_backgroundMode = mode;
|
||
|
||
// SetBackgroundColour now only refers to text background
|
||
// and m_backgroundMode is used there
|
||
}
|
||
|
||
void wxDC::SetLogicalFunction(int function)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
m_logicalFunction = function;
|
||
|
||
SetRop(m_hDC);
|
||
}
|
||
|
||
void wxDC::SetRop(WXHDC dc)
|
||
{
|
||
if ( !dc || m_logicalFunction < 0 )
|
||
return;
|
||
|
||
int rop;
|
||
|
||
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;
|
||
}
|
||
|
||
SetROP2(GetHdc(), rop);
|
||
}
|
||
|
||
bool wxDC::StartDoc(const wxString& WXUNUSED(message))
|
||
{
|
||
// We might be previewing, so return true to let it continue.
|
||
return true;
|
||
}
|
||
|
||
void wxDC::EndDoc()
|
||
{
|
||
}
|
||
|
||
void wxDC::StartPage()
|
||
{
|
||
}
|
||
|
||
void wxDC::EndPage()
|
||
{
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// text metrics
|
||
// ---------------------------------------------------------------------------
|
||
|
||
wxCoord wxDC::GetCharHeight() const
|
||
{
|
||
WXMICROWIN_CHECK_HDC_RET(0)
|
||
|
||
TEXTMETRIC lpTextMetric;
|
||
|
||
GetTextMetrics(GetHdc(), &lpTextMetric);
|
||
|
||
return lpTextMetric.tmHeight;
|
||
}
|
||
|
||
wxCoord wxDC::GetCharWidth() const
|
||
{
|
||
WXMICROWIN_CHECK_HDC_RET(0)
|
||
|
||
TEXTMETRIC lpTextMetric;
|
||
|
||
GetTextMetrics(GetHdc(), &lpTextMetric);
|
||
|
||
return lpTextMetric.tmAveCharWidth;
|
||
}
|
||
|
||
void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
|
||
wxCoord *descent, wxCoord *externalLeading,
|
||
wxFont *font) const
|
||
{
|
||
#ifdef __WXMICROWIN__
|
||
if (!GetHDC())
|
||
{
|
||
if (x) *x = 0;
|
||
if (y) *y = 0;
|
||
if (descent) *descent = 0;
|
||
if (externalLeading) *externalLeading = 0;
|
||
return;
|
||
}
|
||
#endif // __WXMICROWIN__
|
||
|
||
HFONT hfontOld;
|
||
if ( font )
|
||
{
|
||
wxASSERT_MSG( font->Ok(), _T("invalid font in wxDC::GetTextExtent") );
|
||
|
||
hfontOld = (HFONT)::SelectObject(GetHdc(), GetHfontOf(*font));
|
||
}
|
||
else // don't change the font
|
||
{
|
||
hfontOld = 0;
|
||
}
|
||
|
||
SIZE sizeRect;
|
||
const size_t len = string.length();
|
||
if ( !::GetTextExtentPoint32(GetHdc(), string, len, &sizeRect) )
|
||
{
|
||
wxLogLastError(_T("GetTextExtentPoint32()"));
|
||
}
|
||
|
||
#if !defined(_WIN32_WCE) || (_WIN32_WCE >= 400)
|
||
// the result computed by GetTextExtentPoint32() may be too small as it
|
||
// accounts for under/overhang of the first/last character while we want
|
||
// just the bounding rect for this string so adjust the width as needed
|
||
// (using API not available in 2002 SDKs of WinCE)
|
||
if ( len > 0 )
|
||
{
|
||
ABC width;
|
||
const wxChar chFirst = *string.begin();
|
||
if ( ::GetCharABCWidths(GetHdc(), chFirst, chFirst, &width) )
|
||
{
|
||
if ( width.abcA < 0 )
|
||
sizeRect.cx -= width.abcA;
|
||
|
||
if ( len > 1 )
|
||
{
|
||
const wxChar chLast = *string.rbegin();
|
||
::GetCharABCWidths(GetHdc(), chLast, chLast, &width);
|
||
}
|
||
//else: we already have the width of the last character
|
||
|
||
if ( width.abcC < 0 )
|
||
sizeRect.cx -= width.abcC;
|
||
}
|
||
//else: GetCharABCWidths() failed, not a TrueType font?
|
||
}
|
||
#endif // !defined(_WIN32_WCE) || (_WIN32_WCE >= 400)
|
||
|
||
TEXTMETRIC tm;
|
||
::GetTextMetrics(GetHdc(), &tm);
|
||
|
||
if (x)
|
||
*x = sizeRect.cx;
|
||
if (y)
|
||
*y = sizeRect.cy;
|
||
if (descent)
|
||
*descent = tm.tmDescent;
|
||
if (externalLeading)
|
||
*externalLeading = tm.tmExternalLeading;
|
||
|
||
if ( hfontOld )
|
||
{
|
||
::SelectObject(GetHdc(), hfontOld);
|
||
}
|
||
}
|
||
|
||
|
||
// Each element of the array will be the width of the string up to and
|
||
// including the coresoponding character in text.
|
||
|
||
bool wxDC::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
|
||
{
|
||
static int maxLenText = -1;
|
||
static int maxWidth = -1;
|
||
int fit = 0;
|
||
SIZE sz = {0,0};
|
||
int stlen = text.length();
|
||
|
||
if (maxLenText == -1)
|
||
{
|
||
// Win9x and WinNT+ have different limits
|
||
int version = wxGetOsVersion();
|
||
maxLenText = version == wxWINDOWS_NT ? 65535 : 8192;
|
||
maxWidth = version == wxWINDOWS_NT ? INT_MAX : 32767;
|
||
}
|
||
|
||
widths.Empty();
|
||
widths.Add(0, stlen); // fill the array with zeros
|
||
if (stlen == 0)
|
||
return true;
|
||
|
||
if (!::GetTextExtentExPoint(GetHdc(),
|
||
text.c_str(), // string to check
|
||
wxMin(stlen, maxLenText),
|
||
maxWidth,
|
||
&fit, // [out] count of chars
|
||
// that will fit
|
||
&widths[0], // array to fill
|
||
&sz))
|
||
{
|
||
// API failed
|
||
wxLogLastError(wxT("GetTextExtentExPoint"));
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
|
||
|
||
void wxDC::SetMapMode(int mode)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
m_mappingMode = mode;
|
||
|
||
if ( mode == wxMM_TEXT )
|
||
{
|
||
m_logicalScaleX =
|
||
m_logicalScaleY = 1.0;
|
||
}
|
||
else // need to do some calculations
|
||
{
|
||
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") );
|
||
}
|
||
}
|
||
|
||
// 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(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
|
||
::SetWindowExtEx(GetHdc(), width, height, NULL);
|
||
|
||
::SetViewportOrgEx(GetHdc(), m_deviceOriginX, m_deviceOriginY, NULL);
|
||
::SetWindowOrgEx(GetHdc(), m_logicalOriginX, m_logicalOriginY, NULL);
|
||
#endif
|
||
}
|
||
|
||
void wxDC::SetUserScale(double x, double y)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
if ( x == m_userScaleX && y == m_userScaleY )
|
||
return;
|
||
|
||
m_userScaleX = x;
|
||
m_userScaleY = y;
|
||
|
||
this->SetMapMode(m_mappingMode);
|
||
}
|
||
|
||
void wxDC::SetAxisOrientation(bool WXUNUSED_IN_WINCE(xLeftRight),
|
||
bool WXUNUSED_IN_WINCE(yBottomUp))
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
#ifndef __WXWINCE__
|
||
int signX = xLeftRight ? 1 : -1,
|
||
signY = yBottomUp ? -1 : 1;
|
||
|
||
if ( signX != m_signX || signY != m_signY )
|
||
{
|
||
m_signX = signX;
|
||
m_signY = signY;
|
||
|
||
SetMapMode(m_mappingMode);
|
||
}
|
||
#endif
|
||
}
|
||
|
||
void wxDC::SetSystemScale(double x, double y)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
if ( x == m_scaleX && y == m_scaleY )
|
||
return;
|
||
|
||
m_scaleX = x;
|
||
m_scaleY = y;
|
||
|
||
#ifndef __WXWINCE__
|
||
SetMapMode(m_mappingMode);
|
||
#endif
|
||
}
|
||
|
||
void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
if ( x == m_logicalOriginX && y == m_logicalOriginY )
|
||
return;
|
||
|
||
m_logicalOriginX = x;
|
||
m_logicalOriginY = y;
|
||
|
||
#ifndef __WXWINCE__
|
||
::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
|
||
#endif
|
||
}
|
||
|
||
void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
if ( x == m_deviceOriginX && y == m_deviceOriginY )
|
||
return;
|
||
|
||
m_deviceOriginX = x;
|
||
m_deviceOriginY = y;
|
||
|
||
::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// coordinates transformations
|
||
// ---------------------------------------------------------------------------
|
||
|
||
wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
|
||
{
|
||
return DeviceToLogicalXRel(x - m_deviceOriginX)*m_signX + m_logicalOriginX;
|
||
}
|
||
|
||
wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
|
||
{
|
||
// axis orientation is not taken into account for conversion of a distance
|
||
return (wxCoord)(x / (m_logicalScaleX*m_userScaleX*m_scaleX));
|
||
}
|
||
|
||
wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
|
||
{
|
||
return DeviceToLogicalYRel(y - m_deviceOriginY)*m_signY + m_logicalOriginY;
|
||
}
|
||
|
||
wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
|
||
{
|
||
// axis orientation is not taken into account for conversion of a distance
|
||
return (wxCoord)( y / (m_logicalScaleY*m_userScaleY*m_scaleY));
|
||
}
|
||
|
||
wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
|
||
{
|
||
return LogicalToDeviceXRel(x - m_logicalOriginX)*m_signX + m_deviceOriginX;
|
||
}
|
||
|
||
wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
|
||
{
|
||
// axis orientation is not taken into account for conversion of a distance
|
||
return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_scaleX);
|
||
}
|
||
|
||
wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
|
||
{
|
||
return LogicalToDeviceYRel(y - m_logicalOriginY)*m_signY + m_deviceOriginY;
|
||
}
|
||
|
||
wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
|
||
{
|
||
// axis orientation is not taken into account for conversion of a distance
|
||
return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_scaleY);
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// 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)
|
||
{
|
||
wxCHECK_MSG( source, false, _T("wxDC::Blit(): NULL wxDC pointer") );
|
||
|
||
WXMICROWIN_CHECK_HDC_RET(false)
|
||
|
||
// if either the source or destination has alpha channel, we must use
|
||
// AlphaBlt() as other function don't handle it correctly
|
||
const wxBitmap& bmpSrc = source->m_selectedBitmap;
|
||
if ( bmpSrc.Ok() && (bmpSrc.HasAlpha() ||
|
||
(m_selectedBitmap.Ok() && m_selectedBitmap.HasAlpha())) )
|
||
{
|
||
if ( AlphaBlt(GetHdc(), xdest, ydest, width, height,
|
||
xsrc, ysrc, GetHdcOf(*source), bmpSrc) )
|
||
return true;
|
||
}
|
||
|
||
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 (xsrcMask == -1 && ysrcMask == -1)
|
||
{
|
||
xsrcMask = xsrc; ysrcMask = ysrc;
|
||
}
|
||
|
||
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;
|
||
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 wxWidgets 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
|
||
{
|
||
// 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);
|
||
|
||
// Figure out what co-ordinate system we're supposed to specify
|
||
// ysrc in.
|
||
const LONG hDIB = ds.dsBmih.biHeight;
|
||
if ( hDIB > 0 )
|
||
{
|
||
// reflect ysrc
|
||
ysrc = hDIB - (ysrc + height);
|
||
}
|
||
|
||
if ( ::StretchDIBits(GetHdc(),
|
||
xdest, ydest,
|
||
width, height,
|
||
xsrc, ysrc,
|
||
width, height,
|
||
ds.dsBm.bmBits,
|
||
(LPBITMAPINFO)&ds.dsBmih,
|
||
DIB_RGB_COLORS,
|
||
SRCCOPY
|
||
) == (int)GDI_ERROR )
|
||
{
|
||
// On Win9x this API fails most (all?) of the time, so
|
||
// logging it becomes quite distracting. Since it falls
|
||
// back to the code below this is not really serious, so
|
||
// don't log it.
|
||
//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::GetDeviceSize(int *width, int *height) const
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
if ( width )
|
||
*width = ::GetDeviceCaps(GetHdc(), HORZRES);
|
||
if ( height )
|
||
*height = ::GetDeviceCaps(GetHdc(), VERTRES);
|
||
}
|
||
|
||
void wxDC::DoGetSizeMM(int *w, int *h) const
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
// 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);
|
||
|
||
if ( w )
|
||
{
|
||
int wTotal = ::GetDeviceCaps(GetHdc(), HORZRES);
|
||
|
||
wxCHECK_RET( wTotal, _T("0 width device?") );
|
||
|
||
*w = (wPixels * ::GetDeviceCaps(GetHdc(), HORZSIZE)) / wTotal;
|
||
}
|
||
|
||
if ( h )
|
||
{
|
||
int hTotal = ::GetDeviceCaps(GetHdc(), VERTRES);
|
||
|
||
wxCHECK_RET( hTotal, _T("0 height device?") );
|
||
|
||
*h = (hPixels * ::GetDeviceCaps(GetHdc(), VERTSIZE)) / hTotal;
|
||
}
|
||
}
|
||
|
||
wxSize wxDC::GetPPI() const
|
||
{
|
||
WXMICROWIN_CHECK_HDC_RET(wxSize(0,0))
|
||
|
||
int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
|
||
int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
|
||
|
||
return wxSize(x, y);
|
||
}
|
||
|
||
// For use by wxWidgets only, unless custom units are required.
|
||
void wxDC::SetLogicalScale(double x, double y)
|
||
{
|
||
WXMICROWIN_CHECK_HDC
|
||
|
||
m_logicalScaleX = x;
|
||
m_logicalScaleY = y;
|
||
}
|
||
|
||
// ----------------------------------------------------------------------------
|
||
// 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;
|
||
|
||
wxDCCacheEntry::wxDCCacheEntry(WXHBITMAP hBitmap, int w, int h, int depth)
|
||
{
|
||
m_bitmap = hBitmap;
|
||
m_dc = 0;
|
||
m_width = w;
|
||
m_height = h;
|
||
m_depth = depth;
|
||
}
|
||
|
||
wxDCCacheEntry::wxDCCacheEntry(WXHDC hDC, int depth)
|
||
{
|
||
m_bitmap = 0;
|
||
m_dc = hDC;
|
||
m_width = 0;
|
||
m_height = 0;
|
||
m_depth = depth;
|
||
}
|
||
|
||
wxDCCacheEntry::~wxDCCacheEntry()
|
||
{
|
||
if (m_bitmap)
|
||
::DeleteObject((HBITMAP) m_bitmap);
|
||
if (m_dc)
|
||
::DeleteDC((HDC) m_dc);
|
||
}
|
||
|
||
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;
|
||
}
|
||
|
||
wxDCCacheEntry* wxDC::FindDCInCache(wxDCCacheEntry* notThis, WXHDC dc)
|
||
{
|
||
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::AddToBitmapCache(wxDCCacheEntry* entry)
|
||
{
|
||
sm_bitmapCache.Append(entry);
|
||
}
|
||
|
||
void wxDC::AddToDCCache(wxDCCacheEntry* entry)
|
||
{
|
||
sm_dcCache.Append(entry);
|
||
}
|
||
|
||
void wxDC::ClearCache()
|
||
{
|
||
WX_CLEAR_LIST(wxList, sm_dcCache);
|
||
WX_CLEAR_LIST(wxList, sm_bitmapCache);
|
||
}
|
||
|
||
// Clean up cache at app exit
|
||
class wxDCModule : public wxModule
|
||
{
|
||
public:
|
||
virtual bool OnInit() { return true; }
|
||
virtual void OnExit() { wxDC::ClearCache(); }
|
||
|
||
private:
|
||
DECLARE_DYNAMIC_CLASS(wxDCModule)
|
||
};
|
||
|
||
IMPLEMENT_DYNAMIC_CLASS(wxDCModule, wxModule)
|
||
|
||
#endif // wxUSE_DC_CACHEING
|
||
|
||
// ----------------------------------------------------------------------------
|
||
// alpha channel support
|
||
// ----------------------------------------------------------------------------
|
||
|
||
static bool AlphaBlt(HDC hdcDst,
|
||
int x, int y, int width, int height,
|
||
int srcX, int srcY, HDC hdcSrc,
|
||
const wxBitmap& bmp)
|
||
{
|
||
wxASSERT_MSG( bmp.Ok() && bmp.HasAlpha(), _T("AlphaBlt(): invalid bitmap") );
|
||
wxASSERT_MSG( hdcDst && hdcSrc, _T("AlphaBlt(): invalid HDC") );
|
||
|
||
// 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);
|
||
|
||
static AlphaBlend_t pfnAlphaBlend = wxMSIMG32_SYMBOL(AlphaBlend);
|
||
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, srcX, srcY, width, height,
|
||
bf) )
|
||
{
|
||
// skip wxAlphaBlend() call below
|
||
return true;
|
||
}
|
||
|
||
wxLogLastError(_T("AlphaBlend"));
|
||
}
|
||
#else
|
||
wxUnusedVar(hdcSrc);
|
||
#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, srcX, srcY, 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)
|
||
wxUnusedVar(bmp);
|
||
return false;
|
||
#endif // wxHAVE_RAW_BITMAP
|
||
}
|
||
|
||
|
||
// wxAlphaBlend: our fallback if ::AlphaBlend() is unavailable
|
||
#ifdef wxHAVE_RAW_BITMAP
|
||
|
||
static void
|
||
wxAlphaBlend(HDC hdcDst, int xDst, int yDst,
|
||
int w, int h,
|
||
int srcX, int srcY, const wxBitmap& bmpSrc)
|
||
{
|
||
// 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, xDst, yDst, 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);
|
||
|
||
pSrc.Offset(dataSrc, srcX, srcY);
|
||
|
||
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 // #ifdef wxHAVE_RAW_BITMAP
|
||
|
||
void wxDC::DoGradientFillLinear (const wxRect& rect,
|
||
const wxColour& initialColour,
|
||
const wxColour& destColour,
|
||
wxDirection nDirection)
|
||
{
|
||
// use native function if we have compile-time support it and can load it
|
||
// during run-time (linking to it statically would make the program
|
||
// unusable on earlier Windows versions)
|
||
#if defined(GRADIENT_FILL_RECT_H) && wxUSE_DYNLIB_CLASS
|
||
typedef BOOL
|
||
(WINAPI *GradientFill_t)(HDC, PTRIVERTEX, ULONG, PVOID, ULONG, ULONG);
|
||
static GradientFill_t pfnGradientFill = wxMSIMG32_SYMBOL(GradientFill);
|
||
|
||
if ( pfnGradientFill )
|
||
{
|
||
GRADIENT_RECT grect;
|
||
grect.UpperLeft = 0;
|
||
grect.LowerRight = 1;
|
||
|
||
// invert colours direction if not filling from left-to-right or
|
||
// top-to-bottom
|
||
int firstVertex = nDirection == wxNORTH || nDirection == wxWEST ? 1 : 0;
|
||
|
||
// one vertex for upper left and one for upper-right
|
||
TRIVERTEX vertices[2];
|
||
|
||
vertices[0].x = rect.GetLeft();
|
||
vertices[0].y = rect.GetTop();
|
||
vertices[1].x = rect.GetRight();
|
||
vertices[1].y = rect.GetBottom();
|
||
|
||
vertices[firstVertex].Red = (COLOR16)(initialColour.Red() << 8);
|
||
vertices[firstVertex].Green = (COLOR16)(initialColour.Green() << 8);
|
||
vertices[firstVertex].Blue = (COLOR16)(initialColour.Blue() << 8);
|
||
vertices[firstVertex].Alpha = 0;
|
||
vertices[1 - firstVertex].Red = (COLOR16)(destColour.Red() << 8);
|
||
vertices[1 - firstVertex].Green = (COLOR16)(destColour.Green() << 8);
|
||
vertices[1 - firstVertex].Blue = (COLOR16)(destColour.Blue() << 8);
|
||
vertices[1 - firstVertex].Alpha = 0;
|
||
|
||
if ( (*pfnGradientFill)
|
||
(
|
||
GetHdc(),
|
||
vertices,
|
||
WXSIZEOF(vertices),
|
||
&grect,
|
||
1,
|
||
nDirection == wxWEST || nDirection == wxEAST
|
||
? GRADIENT_FILL_RECT_H
|
||
: GRADIENT_FILL_RECT_V
|
||
) )
|
||
{
|
||
// skip call of the base class version below
|
||
return;
|
||
}
|
||
|
||
wxLogLastError(_T("GradientFill"));
|
||
}
|
||
#endif // wxUSE_DYNLIB_CLASS
|
||
|
||
wxDCBase::DoGradientFillLinear(rect, initialColour, destColour, nDirection);
|
||
}
|