/////////////////////////////////////////////////////////////////////////////
-// Name: dc.cpp
-// Purpose: wxDC class
+// Name: src/msw/dc.cpp
+// Purpose: wxDC class for MSW port
// Author: Julian Smart
// Modified by:
// Created: 01/02/97
// headers
// ---------------------------------------------------------------------------
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
- #pragma implementation "dc.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
*/
#ifdef __WXWINCE__
- #define XLOG2DEV(x) ((x-m_logicalOriginX)*m_signX+m_deviceOriginX)
- #define YLOG2DEV(y) ((y-m_logicalOriginY)*m_signY+m_deviceOriginY)
- #define XDEV2LOG(x) ((x-m_deviceOriginX)*m_signX+m_logicalOriginX)
- #define YDEV2LOG(y) ((y-m_deviceOriginY)*m_signY+m_logicalOriginY)
+ #define XLOG2DEV(x) ((x-m_logicalOriginX)*m_signX)
+ #define YLOG2DEV(y) ((y-m_logicalOriginY)*m_signY)
+ #define XDEV2LOG(x) ((x)*m_signX+m_logicalOriginX)
+ #define YDEV2LOG(y) ((y)*m_signY+m_logicalOriginY)
#else
#define XLOG2DEV(x) (x)
#define YLOG2DEV(y) (y)
// otherwise
static bool AlphaBlt(HDC hdcDst,
int x, int y, int w, int h,
- HDC hdcSrc,
+ int srcX, int srcY, HDC hdcSrc,
const wxBitmap& bmpSrc);
#ifdef wxHAVE_RAW_BITMAP
-// our (limited) AlphaBlend() replacement
+
+// our (limited) AlphaBlend() replacement for Windows versions not providing it
static void
-wxAlphaBlend(HDC hdcDst, int x, int y, int w, int h, const wxBitmap& bmp);
-#endif
+wxAlphaBlend(HDC hdcDst, int x, int y, int w, int h,
+ int srcX, int srcY, const wxBitmap& bmp);
+
+#endif // wxHAVE_RAW_BITMAP
// ----------------------------------------------------------------------------
// private classes
class StretchBltModeChanger
{
public:
- StretchBltModeChanger(HDC hdc, int mode)
+ StretchBltModeChanger(HDC hdc,
+ int WXUNUSED_IN_WINCE(mode))
: m_hdc(hdc)
{
#ifndef __WXWINCE__
m_modeOld = ::SetStretchBltMode(m_hdc, mode);
if ( !m_modeOld )
wxLogLastError(_T("SetStretchBltMode"));
-#else
- wxUnusedVar(mode);
#endif
}
DECLARE_NO_COPY_CLASS(StretchBltModeChanger)
};
+// support for dynamic loading of msimg32.dll which we use for some functions
+class wxMSImg32DLL
+{
+public:
+ // return the symbol with the given name if the DLL not loaded or symbol
+ // not present
+ static void *GetSymbol(const wxChar *name)
+ {
+ wxLogNull noLog;
+
+ if ( !ms_triedToLoad )
+ {
+ ms_triedToLoad = true;
+ ms_dll.Load(_T("msimg32"));
+ }
+
+ return ms_dll.IsLoaded() ? ms_dll.GetSymbol(name) : NULL;
+ }
+
+private:
+ static wxDynamicLibrary ms_dll;
+ static bool ms_triedToLoad;
+};
+
+wxDynamicLibrary wxMSImg32DLL::ms_dll;
+bool wxMSImg32DLL::ms_triedToLoad = false;
+
+// helper macro for getting the symbols from msimg32.dll: it supposes that a
+// type "name_t" is defined and casts the returned symbol to it automatically
+#define wxMSIMG32_SYMBOL(name) (name ## _t)wxMSImg32DLL::GetSymbol(_T(#name))
+
// ===========================================================================
// implementation
// ===========================================================================
// wxDC
// ---------------------------------------------------------------------------
-// Default constructor
-wxDC::wxDC()
-{
- m_canvas = NULL;
-
- m_oldBitmap = 0;
- m_oldPen = 0;
- m_oldBrush = 0;
- m_oldFont = 0;
-#if wxUSE_PALETTE
- m_oldPalette = 0;
-#endif // wxUSE_PALETTE
-
- m_bOwnsDC = false;
- m_hDC = 0;
-}
-
wxDC::~wxDC()
{
if ( m_hDC != 0 )
if ( !::GetClipBox(GetHdc(), &rectClip) )
return;
+ // GetClipBox returns logical coordinates, so transform to device
+ rectClip.left = LogicalToDeviceX(rectClip.left);
+ rectClip.top = LogicalToDeviceY(rectClip.top);
+ rectClip.right = LogicalToDeviceX(rectClip.right);
+ rectClip.bottom = LogicalToDeviceY(rectClip.bottom);
+
HRGN hrgnDest = ::CreateRectRgn(0, 0, 0, 0);
HRGN hrgnClipOld = ::CreateRectRgn(rectClip.left, rectClip.top,
rectClip.right, rectClip.bottom);
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
HRGN rgn = CreateRectRgn(0, 0, 32000, 32000);
::SelectClipRgn(GetHdc(), rgn);
::DeleteObject(rgn);
+#endif
}
wxDCBase::DestroyClippingRegion();
#endif
}
-bool wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
+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__
- wxUnusedVar(x);
- wxUnusedVar(y);
- wxUnusedVar(col);
- wxUnusedVar(style);
return false;
#else
-
WXMICROWIN_CHECK_HDC_RET(false)
bool success = (0 != ::ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
CalcBoundingBox(x, y);
}
-void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
+void wxDC::DoDrawPolygon(int n,
+ wxPoint points[],
+ wxCoord xoffset,
+ wxCoord yoffset,
+ int WXUNUSED_IN_WINCE(fillStyle))
{
WXMICROWIN_CHECK_HDC
}
#ifndef __WXWINCE__
int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
-#else
- wxUnusedVar(fillStyle);
#endif
(void)Polygon(GetHdc(), cpoints, n);
#ifndef __WXWINCE__
// I wonder if this shouldn´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(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)
{
MemoryHDC hdcMem;
SelectInHDC select(hdcMem, GetHbitmapOf(bmp));
- if ( AlphaBlt(GetHdc(), x, y, width, height, hdcMem, bmp) )
+ if ( AlphaBlt(GetHdc(), x, y, width, height, 0, 0, hdcMem, bmp) )
return;
}
SIZE sizeRect;
TEXTMETRIC tm;
- GetTextExtentPoint(GetHdc(), string, string.length(), &sizeRect);
+ ::GetTextExtentPoint32(GetHdc(), string, string.length(), &sizeRect);
GetTextMetrics(GetHdc(), &tm);
if (x)
static int maxWidth = -1;
int fit = 0;
SIZE sz = {0,0};
- int stlen = text.Length();
+ int stlen = text.length();
if (maxLenText == -1)
{
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
this->SetMapMode(m_mappingMode);
}
-void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
+void wxDC::SetAxisOrientation(bool WXUNUSED_IN_WINCE(xLeftRight),
+ bool WXUNUSED_IN_WINCE(yBottomUp))
{
WXMICROWIN_CHECK_HDC
SetMapMode(m_mappingMode);
}
-#else
- wxUnusedVar(xLeftRight);
- wxUnusedVar(yBottomUp);
#endif
}
m_deviceOriginX = x;
m_deviceOriginY = y;
-#ifndef __WXWINCE__
::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
-#endif
}
// ---------------------------------------------------------------------------
(m_selectedBitmap.Ok() && m_selectedBitmap.HasAlpha())) )
{
if ( AlphaBlt(GetHdc(), xdest, ydest, width, height,
- GetHdcOf(*source), bmpSrc) )
+ xsrc, ysrc, GetHdcOf(*source), bmpSrc) )
return true;
}
return success;
}
-void wxDC::DoGetSize(int *w, int *h) const
+void wxDC::GetDeviceSize(int *width, int *height) const
{
WXMICROWIN_CHECK_HDC
- if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
- if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
+ if ( width )
+ *width = ::GetDeviceCaps(GetHdc(), HORZRES);
+ if ( height )
+ *height = ::GetDeviceCaps(GetHdc(), VERTRES);
}
void wxDC::DoGetSizeMM(int *w, int *h) const
static bool AlphaBlt(HDC hdcDst,
int x, int y, int width, int height,
- HDC hdcSrc,
+ int srcX, int srcY, HDC hdcSrc,
const wxBitmap& bmp)
{
wxASSERT_MSG( bmp.Ok() && bmp.HasAlpha(), _T("AlphaBlt(): invalid bitmap") );
HDC,int,int,int,int,
BLENDFUNCTION);
- // bitmaps can be drawn only from GUI thread so there is no need to
- // protect this static variable from multiple threads
- static bool s_triedToLoad = false;
- static AlphaBlend_t pfnAlphaBlend = NULL;
- if ( !s_triedToLoad )
- {
- s_triedToLoad = true;
-
- // don't give errors about the DLL being unavailable, we're
- // prepared to handle this
- wxLogNull nolog;
-
- wxDynamicLibrary dll(_T("msimg32.dll"));
- if ( dll.IsLoaded() )
- {
- pfnAlphaBlend = (AlphaBlend_t)dll.GetSymbol(_T("AlphaBlend"));
- if ( pfnAlphaBlend )
- {
- // we must keep the DLL loaded if we want to be able to
- // call AlphaBlend() so just never unload it at all, not a
- // big deal
- dll.Detach();
- }
- }
- }
-
+ static AlphaBlend_t pfnAlphaBlend = wxMSIMG32_SYMBOL(AlphaBlend);
if ( pfnAlphaBlend )
{
BLENDFUNCTION bf;
bf.AlphaFormat = AC_SRC_ALPHA;
if ( pfnAlphaBlend(hdcDst, x, y, width, height,
- hdcSrc, 0, 0, width, height,
+ hdcSrc, srcX, srcY, width, height,
bf) )
{
// skip wxAlphaBlend() call below
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, bmp);
+ wxAlphaBlend(hdcDst, x, y, width, height, srcX, srcY, bmp);
return true;
#else // !wxHAVE_RAW_BITMAP
#ifdef wxHAVE_RAW_BITMAP
static void
-wxAlphaBlend(HDC hdcDst, int xDst, int yDst, int w, int h, const wxBitmap& bmpSrc)
+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, 0, 0, SRCCOPY) )
+ if ( !::BitBlt(hdcMem, 0, 0, w, h, hdcDst, xDst, yDst, SRCCOPY) )
{
wxLogLastError(_T("BitBlt"));
}
wxAlphaPixelData::Iterator pDst(dataDst),
pSrc(dataSrc);
+ pSrc.Offset(dataSrc, srcX, srcY);
+
for ( int y = 0; y < h; y++ )
{
wxAlphaPixelData::Iterator pDstRowStart = pDst,
}
#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 = initialColour.Red() << 8;
+ vertices[firstVertex].Green = initialColour.Green() << 8;
+ vertices[firstVertex].Blue = initialColour.Blue() << 8;
+ vertices[firstVertex].Alpha = 0;
+ vertices[1 - firstVertex].Red = destColour.Red() << 8;
+ vertices[1 - firstVertex].Green = destColour.Green() << 8;
+ vertices[1 - firstVertex].Blue = destColour.Blue() << 8;
+ vertices[1 - firstVertex].Alpha = 0;
+
+ if (nDirection == wxWEST ||
+ nDirection == wxEAST)
+ 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);
+}
projects / wxWidgets.git / blobdiff