#include "wx/bitmap.h"
#include "wx/dcmemory.h"
#include "wx/log.h"
+ #include "wx/math.h"
#include "wx/icon.h"
#include "wx/dcprint.h"
#include "wx/module.h"
#include <string.h>
#include "wx/msw/private/dc.h"
+#include "wx/private/textmeasure.h"
using namespace wxMSWImpl;
// constants
// ---------------------------------------------------------------------------
-static const int VIEWPORT_EXTENT = 1000;
+// The device space in Win32 GDI measures 2^27*2^27 , so we use 2^27-1 as the
+// maximal possible view port extent.
+static const int VIEWPORT_EXTENT = 134217727;
// 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)
}
void wxMSWDCImpl::DoDrawPolygon(int n,
- wxPoint points[],
+ const wxPoint points[],
wxCoord xoffset,
wxCoord yoffset,
wxPolygonFillMode WXUNUSED_IN_WINCE(fillStyle))
void
wxMSWDCImpl::DoDrawPolyPolygon(int n,
- int count[],
- wxPoint points[],
+ const int count[],
+ const wxPoint points[],
wxCoord xoffset,
wxCoord yoffset,
wxPolygonFillMode fillStyle)
// __WXWINCE__
}
-void wxMSWDCImpl::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
+void wxMSWDCImpl::DoDrawLines(int n, const wxPoint points[], wxCoord xoffset, wxCoord yoffset)
{
WXMICROWIN_CHECK_HDC
}
#endif // __WXMICROWIN__
- HFONT hfontOld;
- if ( font )
- {
- wxASSERT_MSG( font->IsOk(), wxT("invalid font in wxMSWDCImpl::GetTextExtent") );
+ wxASSERT_MSG( !font || font->IsOk(), wxT("invalid font in wxMSWDCImpl::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.wx_str(), len, &sizeRect) )
- {
- wxLogLastError(wxT("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)
-
- if (x)
- *x = sizeRect.cx;
- if (y)
- *y = sizeRect.cy;
-
- if ( descent || externalLeading )
- {
- DoGetFontMetrics(NULL, NULL, descent, NULL, externalLeading, NULL);
- }
-
- if ( hfontOld )
- {
- ::SelectObject(GetHdc(), hfontOld);
- }
+ wxTextMeasure txm(GetOwner(), font);
+ txm.GetTextExtent(string, x, y, descent, externalLeading);
}
-// Each element of the array will be the width of the string up to and
-// including the coresoponding character in text.
-
bool wxMSWDCImpl::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();
+ wxTextMeasure txm(GetOwner(), NULL); // don't change the font
+ return txm.GetPartialTextExtents(text, widths, 1.0);
+}
- if (maxLenText == -1)
- {
- // Win9x and WinNT+ have different limits
- int version = wxGetOsVersion();
- maxLenText = version == wxOS_WINDOWS_NT ? 65535 : 8192;
- maxWidth = version == wxOS_WINDOWS_NT ? INT_MAX : 32767;
- }
+namespace
+{
- widths.Empty();
- widths.Add(0, stlen); // fill the array with zeros
- if (stlen == 0)
- return true;
+void ApplyEffectiveScale(double scale, int sign, int *device, int *logical)
+{
+ // To reduce rounding errors as much as possible, we try to use the largest
+ // possible extent (2^27-1) for the device space but we must also avoid
+ // overflowing the int range i.e. ensure that logical extents are less than
+ // 2^31 in magnitude. So the minimal scale we can use is 1/16 as for
+ // anything smaller VIEWPORT_EXTENT/scale would overflow the int range.
+ static const double MIN_LOGICAL_SCALE = 1./16;
- 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;
+ double physExtent = VIEWPORT_EXTENT;
+ if ( scale < MIN_LOGICAL_SCALE )
+ {
+ physExtent *= scale/MIN_LOGICAL_SCALE;
+ scale = MIN_LOGICAL_SCALE;
}
- return true;
+ *device = wxRound(physExtent);
+ *logical = sign*wxRound(VIEWPORT_EXTENT/scale);
}
+} // anonymous namespace
+
void wxMSWDCImpl::RealizeScaleAndOrigin()
{
// although it may seem wasteful to always use MM_ANISOTROPIC here instead
// wxWidgets API assumes that the coordinate space is "infinite" (i.e. only
// limited by 2^32 range of the integer coordinates) but in MSW API we must
- // actually specify the extents that we use. So we more or less arbitrarily
- // decide to use "base" VIEWPORT_EXTENT and adjust it depending on scale.
- //
- // To avoid rounding errors we prefer to multiply by the scale if it's > 1
- // and to divide by it if it's < 1.
+ // actually specify the extents that we use so compute them here.
+
int devExtX, devExtY, // Viewport, i.e. device space, extents.
logExtX, logExtY; // Window, i.e. logical coordinate space, extents.
- if ( m_scaleX >= 1 )
- {
- devExtX = VIEWPORT_EXTENT*m_scaleX;
- logExtX = m_signX*VIEWPORT_EXTENT;
- }
- else
- {
- devExtX = VIEWPORT_EXTENT;
- logExtX = m_signX*VIEWPORT_EXTENT/m_scaleX;
- }
- if ( m_scaleY >= 1 )
- {
- devExtY = VIEWPORT_EXTENT*m_scaleY;
- logExtY = m_signY*VIEWPORT_EXTENT;
- }
- else
- {
- devExtY = VIEWPORT_EXTENT;
- logExtY = m_signY*VIEWPORT_EXTENT/m_scaleY;
- }
+ ApplyEffectiveScale(m_scaleX, m_signX, &devExtX, &logExtX);
+ ApplyEffectiveScale(m_scaleY, m_signY, &devExtY, &logExtY);
::SetViewportExtEx(GetHdc(), devExtX, devExtY, NULL);
::SetWindowExtEx(GetHdc(), logExtX, logExtY, NULL);
// 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)
+ static bool s_maskBltAllowed = wxSystemOptions::GetOptionInt("no-maskblt") == 0;
+ if ( s_maskBltAllowed )
#endif
{
if ( dstWidth == srcWidth && dstHeight == srcHeight )
{
SET_STRETCH_BLT_MODE(GetHdc());
+ // Unlike all the other functions used here (i.e. AlphaBlt(),
+ // MaskBlt(), BitBlt() and StretchBlt()), StretchDIBits() does
+ // not take into account the source DC logical coordinates
+ // automatically as it doesn't even work with the source HDC.
+ // So do this manually to ensure that the coordinates are
+ // interpreted in the same way here as in all the other cases.
+ xsrc = source->LogicalToDeviceX(xsrc);
+ ysrc = source->LogicalToDeviceY(ysrc);
+ srcWidth = source->LogicalToDeviceXRel(srcWidth);
+ srcHeight = source->LogicalToDeviceYRel(srcHeight);
+
// Figure out what co-ordinate system we're supposed to specify
// ysrc in.
const LONG hDIB = ds.dsBmih.biHeight;
projects / wxWidgets.git / blobdiff