/////////////////////////////////////////////////////////////////////////////
-// 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"
#endif
#ifndef WX_PRECOMP
+ #include "wx/image.h"
#include "wx/window.h"
#include "wx/dc.h"
#include "wx/utils.h"
#include "wx/icon.h"
#endif
-#include "wx/msw/private.h" // needs to be before #include <commdlg.h>
-
#include "wx/sysopt.h"
#include "wx/dcprint.h"
#include "wx/module.h"
#endif
#include <string.h>
-#include <math.h>
-
-#if wxUSE_COMMON_DIALOGS && !defined(__WXMICROWIN__)
- #include <commdlg.h>
-#endif
+#include "wx/msw/wrapcdlg.h"
#ifndef __WIN32__
#include <print.h>
#endif
static const int MM_POINTS = 9;
static const int MM_METRIC = 10;
-// usually this is defined in math.h
-#ifndef M_PI
- static const double M_PI = 3.14159265358979323846;
-#endif // M_PI
-
// ROPs which don't have standard names (see "Ternary Raster Operations" in the
// MSDN docs for how this and other numbers in wxDC::Blit() are obtained)
#define DSTCOPY 0x00AA0029 // a.k.a. NOP operation
coordinates used.
*/
-// logical to device
-#define XLOG2DEV(x) (x)
-#define YLOG2DEV(y) (y)
-
-// device to logical
-#define XDEV2LOG(x) (x)
-#define YDEV2LOG(y) (y)
+#ifdef __WXWINCE__
+ #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)
+ #define XDEV2LOG(x) (x)
+ #define YDEV2LOG(y) (y)
+#endif
// ---------------------------------------------------------------------------
// private functions
// 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_colFgOld = ::GetTextColor(hdc);
m_colBgOld = ::GetBkColor(hdc);
- // note that Windows convention is opposite to wxWindows one, this is
+ // note that Windows convention is opposite to wxWidgets one, this is
// why text colour becomes the background one and vice versa
const wxColour& colFg = dc.GetTextForeground();
if ( colFg.Ok() )
// 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 )
m_clipY2 = (wxCoord) YDEV2LOG(rect.bottom);
}
+void
+wxDC::DoGetClippingBox(wxCoord *x, wxCoord *y, wxCoord *w, wxCoord *h) const
+{
+ // check if we should try to retrieve the clipping region possibly not set
+ // by our SetClippingRegion() but preset by Windows:this can only happen
+ // when we're associated with an existing HDC usign SetHDC(), see there
+ if ( m_clipping && !m_clipX1 && !m_clipX2 )
+ {
+ wxDC *self = wxConstCast(this, wxDC);
+ self->UpdateClipBox();
+
+ if ( !m_clipX1 && !m_clipX2 )
+ self->m_clipping = false;
+ }
+
+ wxDCBase::DoGetClippingBox(x, y, w, h);
+}
+
// common part of DoSetClippingRegion() and DoSetClippingRegionAsRegion()
void wxDC::SetClippingHrgn(WXHRGN hrgn)
{
// note that we combine the new clipping region with the existing one: this
// is compatible with what the other ports do and is the documented
// behaviour now (starting with 2.3.3)
-#if defined(__WIN16__) || defined(__WXWINCE__)
+#if defined(__WXWINCE__)
RECT rectClip;
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);
::DeleteObject(hrgnClipOld);
::DeleteObject(hrgnDest);
-#else // Win32
+#else // !WinCE
if ( ::ExtSelectClipRgn(GetHdc(), (HRGN)hrgn, RGN_AND) == ERROR )
{
wxLogLastError(_T("ExtSelectClipRgn"));
return;
}
-#endif // Win16/32
+#endif // WinCE/!WinCE
m_clipping = true;
::DeleteObject(rgn);
}
- m_clipping = false;
+ wxDCBase::DestroyClippingRegion();
}
// ---------------------------------------------------------------------------
::FillRect(GetHdc(), &rect, brush);
::DeleteObject(brush);
+#ifndef __WXWINCE__
int width = DeviceToLogicalXRel(VIEWPORT_EXTENT)*m_signX,
height = DeviceToLogicalYRel(VIEWPORT_EXTENT)*m_signY;
-#ifndef __WXWINCE__
::SetMapMode(GetHdc(), MM_ANISOTROPIC);
::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
#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__
return false;
#else
-
WXMICROWIN_CHECK_HDC_RET(false)
bool success = (0 != ::ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
#else
DrawFrameControl(GetHdc(), &rect, DFC_MENU, DFCS_MENUCHECK);
#endif
-#else // Win16
- // In WIN16, draw a cross
+#else // Symantec-MicroWin
+ // draw a cross
HPEN blackPen = ::CreatePen(PS_SOLID, 1, RGB(0, 0, 0));
HPEN whiteBrush = (HPEN)::GetStockObject(WHITE_BRUSH);
HPEN hPenOld = (HPEN)::SelectObject(GetHdc(), blackPen);
::SelectObject(GetHdc(), hPenOld);
::SelectObject(GetHdc(), hBrushOld);
::DeleteObject(blackPen);
-#endif // Win32/16
+#endif // Win32/Symantec-MicroWin
CalcBoundingBox(x1, y1);
CalcBoundingBox(x2, y2);
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
void
wxDC::DoDrawPolyPolygon(int n,
- int start[],
+ 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 += start[i];
+ cnt += count[i];
// Do things less efficiently if we have offsets
if (xoffset != 0 || yoffset != 0)
CalcBoundingBox(cpoints[i].x, cpoints[i].y);
}
+#ifndef __WXWINCE__
int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
- (void)PolyPolygon(GetHdc(), cpoints, start, n);
+#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);
- (void)PolyPolygon(GetHdc(), (POINT*) points, start, n);
+#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)
// 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;
}
// use MaskBlt() with ROP which doesn't do anything to dst in the mask
// points
// On some systems, MaskBlt succeeds yet is much much slower
- // than the wxWindows fall-back implementation. So we need
+ // 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
// "upper left" and "upper right"
CalcBoundingBox(x, y);
- CalcBoundingBox(x + wxCoord(w*cos(rad)), y - wxCoord(h*sin(rad)));
+ 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(h*sin(rad)), y + wxCoord(h*cos(rad)));
+ CalcBoundingBox(x + wxCoord(w*cos(rad)), y - wxCoord(w*sin(rad)));
}
#endif
}
SIZE sizeRect;
TEXTMETRIC tm;
- GetTextExtentPoint(GetHdc(), string, string.length(), &sizeRect);
+ ::GetTextExtentPoint32(GetHdc(), string, string.length(), &sizeRect);
GetTextMetrics(GetHdc(), &tm);
if (x)
}
}
+
+// 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
{
WXMICROWIN_CHECK_HDC
-#ifndef __WXWINCE__
if ( x == m_userScaleX && y == m_userScaleY )
return;
m_userScaleX = x;
m_userScaleY = y;
- SetMapMode(m_mappingMode);
-#endif
+ 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
{
WXMICROWIN_CHECK_HDC
-#ifndef __WXWINCE__
if ( x == m_scaleX && y == m_scaleY )
return;
m_scaleX = x;
m_scaleY = y;
+#ifndef __WXWINCE__
SetMapMode(m_mappingMode);
#endif
}
{
WXMICROWIN_CHECK_HDC
-#ifndef __WXWINCE__
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
}
{
WXMICROWIN_CHECK_HDC
-#ifndef __WXWINCE__
if ( x == m_deviceOriginX && y == m_deviceOriginY )
return;
m_deviceOriginY = y;
::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
-#endif
}
// ---------------------------------------------------------------------------
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() )
+ if ( bmpSrc.Ok() && (bmpSrc.HasAlpha() ||
+ (m_selectedBitmap.Ok() && m_selectedBitmap.HasAlpha())) )
{
if ( AlphaBlt(GetHdc(), xdest, ydest, width, height,
- GetHdcOf(*source), bmpSrc) )
+ xsrc, ysrc, GetHdcOf(*source), bmpSrc) )
return true;
}
// of the mask which is also contrary to the Windows one)
// On some systems, MaskBlt succeeds yet is much much slower
- // than the wxWindows fall-back implementation. So we need
+ // 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)
SRCCOPY
) == (int)GDI_ERROR )
{
- wxLogLastError(wxT("StretchDIBits"));
+ // 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
{
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
wxSize wxDC::GetPPI() const
{
- WXMICROWIN_CHECK_HDC_RET(wxSize())
+ WXMICROWIN_CHECK_HDC_RET(wxSize(0,0))
int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
return wxSize(x, y);
}
-// For use by wxWindows only, unless custom units are required.
+// For use by wxWidgets only, unless custom units are required.
void wxDC::SetLogicalScale(double x, double y)
{
WXMICROWIN_CHECK_HDC
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") );
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
// 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
}
#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,
projects / wxWidgets.git / blobdiff