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Merge branch 'msw-scroll-beyond-2_27'

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Increase usable scrolling range in wxMSW by a factor of 10,000 by
switching to handling the device origin in wxWidgets itself instead of
letting GDI handle it.

See #22382.
This commit is contained in:
Vadim Zeitlin
2022-05-05 17:24:58 +02:00
parent ec737396d8 3cc55d5b66
commit bf0f9cf55b
4 changed files with 156 additions and 47 deletions
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2
samples/grid/griddemo.cpp
View File

@@ -1933,7 +1933,7 @@ void GridFrame::OnVTable(wxCommandEvent& )
"Size: ",
"wxGridDemo question",
s_sizeGrid,
0, 32000, this);
0, 10000000, this);
if ( s_sizeGrid != -1 )
{

170
src/msw/dc.cpp
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@@ -102,16 +102,27 @@ static const int VIEWPORT_EXTENT = 134217727;
// ----------------------------------------------------------------------------
/*
We currently let Windows do all the translations itself so these macros are
not really needed (any more) but keep them to enhance readability of the
code by allowing to see where are the logical and where are the device
coordinates used.
We currently let Windows perform the scaling itself, as it might be more
efficient than doing it in our own code, but we handle device origin
translation ourselves as this allows us to use the full (at least 32-bit)
range of wxCoord rather than being limited to 27-bit range of GDI functions.
This means that instead of 2 coordinate systems -- physical and logical --
we actually have 3 of them, as there is also a device coordinate system
which is the same as logical one, but doesn't take the device origin into
account (but does take into account the logical origin and scale). So this
device coordinate system is simply shifted compared to the logical one.
IOW:
logical = (physical - deviceOrigin)/scale + logicalOrigin
device = physical/scale + logicalOrigin = logical + deviceOrigin/scale
*/
#define XLOG2DEV(x) (x)
#define YLOG2DEV(y) (y)
#define XDEV2LOG(x) (x)
#define YDEV2LOG(y) (y)
#define XLOG2DEV(x) ((x) + (m_deviceOriginX / m_scaleX))
#define YLOG2DEV(y) ((y) + (m_deviceOriginY / m_scaleY))
#define XDEV2LOG(x) ((x) - (m_deviceOriginX / m_scaleX))
#define YDEV2LOG(y) ((y) - (m_deviceOriginY / m_scaleY))
// ---------------------------------------------------------------------------
// private functions
@@ -602,10 +613,22 @@ void wxMSWDCImpl::UpdateClipBox()
RECT rect;
::GetClipBox(GetHdc(), &rect);
// Don't shift by the device origin if the clipping box is empty.
if ( rect.left == rect.right && rect.top == rect.bottom )
{
m_clipX1 =
m_clipY1 =
m_clipX2 =
m_clipY2 = 0;
}
else
{
m_clipX1 = (wxCoord) XDEV2LOG(rect.left);
m_clipY1 = (wxCoord) YDEV2LOG(rect.top);
m_clipX2 = (wxCoord) XDEV2LOG(rect.right);
m_clipY2 = (wxCoord) YDEV2LOG(rect.bottom);
}
m_isClipBoxValid = true;
}
@@ -1051,17 +1074,23 @@ void wxMSWDCImpl::DoDrawPolygon(int n,
PolyFillModeSetter polyfillModeSetter(GetHdc(), fillStyle);
// Do things less efficiently if we have offsets
if (xoffset != 0 || yoffset != 0)
// Do things less efficiently if we have offsets or need to account for the
// device origin offset
if (xoffset != 0 || yoffset != 0 || m_deviceOriginX != 0 || m_deviceOriginY != 0)
{
wxScopedArray<POINT> cpoints(n);
int i;
for (i = 0; i < n; i++)
{
// First adjust the logical coordinates to include the offset.
cpoints[i].x = points[i].x + xoffset;
cpoints[i].y = points[i].y + yoffset;
CalcBoundingBox(cpoints[i].x, cpoints[i].y);
// Now convert them to the device coordinates that we need to use.
cpoints[i].x += XLOG2DEV(0);
cpoints[i].y += YLOG2DEV(0);
}
(void)Polygon(GetHdc(), cpoints.get(), n);
}
@@ -1090,8 +1119,8 @@ wxMSWDCImpl::DoDrawPolyPolygon(int n,
PolyFillModeSetter polyfillModeSetter(GetHdc(), fillStyle);
// Do things less efficiently if we have offsets
if (xoffset != 0 || yoffset != 0)
// The code here is similar to the code in DoDrawPolygon() above.
if (xoffset != 0 || yoffset != 0 || m_deviceOriginX != 0 || m_deviceOriginY != 0)
{
wxScopedArray<POINT> cpoints(cnt);
for (i = 0; i < cnt; i++)
@@ -1100,6 +1129,9 @@ wxMSWDCImpl::DoDrawPolyPolygon(int n,
cpoints[i].y = points[i].y + yoffset;
CalcBoundingBox(cpoints[i].x, cpoints[i].y);
cpoints[i].x += XLOG2DEV(0);
cpoints[i].y += YLOG2DEV(0);
}
(void)PolyPolygon(GetHdc(), cpoints.get(), count, n);
}
@@ -1114,8 +1146,8 @@ wxMSWDCImpl::DoDrawPolyPolygon(int n,
void wxMSWDCImpl::DoDrawLines(int n, const wxPoint points[], wxCoord xoffset, wxCoord yoffset)
{
// Do things less efficiently if we have offsets
if (xoffset != 0 || yoffset != 0)
// The logic here is similar to that of DoDrawPolygon() above.
if (xoffset != 0 || yoffset != 0 || m_deviceOriginX != 0 || m_deviceOriginY != 0)
{
wxScopedArray<POINT> cpoints(n);
int i;
@@ -1125,6 +1157,9 @@ void wxMSWDCImpl::DoDrawLines(int n, const wxPoint points[], wxCoord xoffset, wx
cpoints[i].y = (int)(points[i].y + yoffset);
CalcBoundingBox(cpoints[i].x, cpoints[i].y);
cpoints[i].x += XLOG2DEV(0);
cpoints[i].y += YLOG2DEV(0);
}
(void)Polyline(GetHdc(), cpoints.get(), n);
}
@@ -1247,8 +1282,10 @@ void wxMSWDCImpl::DoDrawSpline(const wxPointList *points)
wxPointList::const_iterator itPt = points->begin();
wxPoint* p = *itPt; ++itPt;
lppt[ bezier_pos ].x = x1 = p->x;
lppt[ bezier_pos ].y = y1 = p->y;
x1 = p->x;
y1 = p->y;
lppt[ bezier_pos ].x = XLOG2DEV(x1);
lppt[ bezier_pos ].y = YLOG2DEV(y1);
bezier_pos++;
lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];
bezier_pos++;
@@ -1412,7 +1449,8 @@ void wxMSWDCImpl::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool
MemoryHDC hdcMem;
SelectInHDC select(hdcMem, GetHbitmapOf(curBmp));
if ( AlphaBlt(this, x, y, width, height, 0, 0, width, height, hdcMem, curBmp) )
if ( AlphaBlt(this, XLOG2DEV(x), YLOG2DEV(y), width, height,
0, 0, width, height, hdcMem, curBmp) )
{
CalcBoundingBox(wxPoint(x, y), bmp.GetSize());
return;
@@ -1465,7 +1503,7 @@ void wxMSWDCImpl::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool
}
#endif // wxUSE_PALETTE
ok = ::MaskBlt(cdc, x, y, width, height,
ok = ::MaskBlt(cdc, XLOG2DEV(x), YLOG2DEV(y), width, height,
hdcMem, 0, 0,
hbmpMask, 0, 0,
MAKEROP4(SRCCOPY, DSTCOPY)) != 0;
@@ -1511,7 +1549,8 @@ void wxMSWDCImpl::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool
#endif // wxUSE_PALETTE
HGDIOBJ hOldBitmap = ::SelectObject( memdc, hbitmap );
::BitBlt( cdc, x, y, width, height, memdc, 0, 0, SRCCOPY);
::BitBlt(cdc, XLOG2DEV(x), YLOG2DEV(y), width, height,
memdc, 0, 0, SRCCOPY);
#if wxUSE_PALETTE
if (oldPal)
@@ -2038,7 +2077,6 @@ void wxMSWDCImpl::RealizeScaleAndOrigin()
::SetViewportExtEx(GetHdc(), devExtX, devExtY, NULL);
::SetWindowExtEx(GetHdc(), logExtX, logExtY, NULL);
::SetViewportOrgEx(GetHdc(), m_deviceOriginX, m_deviceOriginY, NULL);
::SetWindowOrgEx(GetHdc(), m_logicalOriginX, m_logicalOriginY, NULL);
m_isClipBoxValid = false;
@@ -2150,27 +2188,65 @@ void wxMSWDCImpl::SetDeviceOrigin(wxCoord x, wxCoord y)
wxDCImpl::SetDeviceOrigin( x, y );
::SetViewportOrgEx(GetHdc(), m_deviceOriginX, m_deviceOriginY, NULL);
// Do not call RealizeScaleAndOrigin(), we don't rely on Windows for the
// device origin translation.
m_isClipBoxValid = false;
}
wxPoint wxMSWDCImpl::DeviceToLogical(wxCoord x, wxCoord y) const
{
POINT p[1];
p[0].x = x;
p[0].y = y;
::DPtoLP(GetHdc(), p, WXSIZEOF(p));
return wxPoint(p[0].x, p[0].y);
POINT p;
p.x = x;
p.y = y;
::DPtoLP(GetHdc(), &p, 1);
wxPoint pt(p.x, p.y);
if ( m_deviceOriginX || m_deviceOriginY )
{
// Note the minus sign, we use it for convenience here as we actually
// need the reverse translation below.
const double dx = -m_deviceOriginX / m_scaleX;
const double dy = -m_deviceOriginY / m_scaleY;
#if wxUSE_DC_TRANSFORM_MATRIX
// In presence of a world transform we need to apply it to the device
// origin shift too as it's not taken into account by the HDC itself.
wxAffineMatrix2D m0 = GetTransformMatrix();
if ( !m0.IsIdentity() )
{
// Compute m^(-1)*T*m where T is the translation matrix.
wxAffineMatrix2D m = m0;
m.Invert();
m.Translate(dx, dy);
m.Concat(m0);
const wxPoint2DDouble dp = m.TransformPoint(pt);
// We don't use rounding here because we don't use it elsewhere.
pt.x = dp.m_x;
pt.y = dp.m_y;
}
else
#endif // wxUSE_DC_TRANSFORM_MATRIX
{
// In this case things can be done much simpler.
pt.x += dx;
pt.y += dy;
}
}
return pt;
}
wxPoint wxMSWDCImpl::LogicalToDevice(wxCoord x, wxCoord y) const
{
POINT p[1];
p[0].x = x;
p[0].y = y;
::LPtoDP(GetHdc(), p, WXSIZEOF(p));
return wxPoint(p[0].x, p[0].y);
POINT p;
p.x = x;
p.y = y;
::LPtoDP(GetHdc(), &p, 1);
return wxPoint(p.x + m_deviceOriginX, p.y + m_deviceOriginY);
}
wxSize wxMSWDCImpl::DeviceToLogicalRel(int x, int y) const
@@ -2300,6 +2376,20 @@ bool wxMSWDCImpl::DoStretchBlit(wxCoord xdest, wxCoord ydest,
return false;
}
const wxRect bbox(xdest, ydest, dstWidth, dstHeight);
// Take the device origin into account manually here, as none of the
// functions used below would do it.
xdest += XLOG2DEV(0);
ydest += YLOG2DEV(0);
const int xsrcOrig = xsrc;
const int ysrcOrig = ysrc;
// This does the same thing as XLOG2DEV() but for the source DC.
xsrc += implSrc->m_deviceOriginX / implSrc->m_scaleX;
ysrc += implSrc->m_deviceOriginY / implSrc->m_scaleY;
HDC hdcSrc = GetHdcOf(*implSrc);
// if either the source or destination has alpha channel, we must use
@@ -2311,7 +2401,7 @@ bool wxMSWDCImpl::DoStretchBlit(wxCoord xdest, wxCoord ydest,
if ( AlphaBlt(this, xdest, ydest, dstWidth, dstHeight,
xsrc, ysrc, srcWidth, srcHeight, hdcSrc, bmpSrc) )
{
CalcBoundingBox(wxPoint(xdest, ydest), wxSize(dstWidth, dstHeight));
CalcBoundingBox(bbox);
return true;
}
}
@@ -2513,8 +2603,8 @@ bool wxMSWDCImpl::DoStretchBlit(wxCoord xdest, wxCoord ydest,
// 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);
xsrc = source->LogicalToDeviceX(xsrcOrig);
ysrc = source->LogicalToDeviceY(ysrcOrig);
srcWidth = source->LogicalToDeviceXRel(srcWidth);
srcHeight = source->LogicalToDeviceYRel(srcHeight);
@@ -2598,9 +2688,7 @@ bool wxMSWDCImpl::DoStretchBlit(wxCoord xdest, wxCoord ydest,
}
if ( success )
{
CalcBoundingBox(wxPoint(xdest, ydest), wxSize(dstWidth, dstHeight));
}
CalcBoundingBox(bbox);
return success;
}
@@ -2915,10 +3003,10 @@ void wxMSWDCImpl::DoGradientFillLinear (const wxRect& rect,
// 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()+1;
vertices[1].y = rect.GetBottom()+1;
vertices[0].x = XLOG2DEV(rect.GetLeft());
vertices[0].y = YLOG2DEV(rect.GetTop());
vertices[1].x = XLOG2DEV(rect.GetRight()) + 1;
vertices[1].y = YLOG2DEV(rect.GetBottom()) + 1;
vertices[firstVertex].Red = (COLOR16)(initialColour.Red() << 8);
vertices[firstVertex].Green = (COLOR16)(initialColour.Green() << 8);

10
src/msw/renderer.cpp
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@@ -103,8 +103,16 @@ protected:
// adjusted for the given wxDC.
static RECT ConvertToRECT(wxDC& dc, const wxRect& rect)
{
// Theme API doesn't know anything about GDI+ transforms, so apply them
// manually.
wxRect rectDevice = dc.GetImpl()->MSWApplyGDIPlusTransform(rect);
// We also need to handle the origin offset manually as we don't use
// Windows support for this, see wxDC code.
rectDevice.Offset(dc.GetDeviceOrigin());
RECT rc;
wxCopyRectToRECT(dc.GetImpl()->MSWApplyGDIPlusTransform(rect), rc);
wxCopyRectToRECT(rectDevice, rc);
return rc;
}
};

13
tests/graphics/coords.cpp
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@@ -685,6 +685,19 @@ static void TransformedWithMatrixAndStdEx(wxDC * dc)
wxPoint2DDouble posLogRef = m1.TransformPoint(wxPoint2DDouble(s_posDev));
wxPoint posLog;
posLog = dc->DeviceToLogical(s_posDev);
if ( wxIsRunningUnderWine() )
{
// Current versions of Wine seem to have a bug and return a value
// which is one off from DPtoLP() used by wxDC::DeviceToLogical()
// and there doesn't seem to be anything we can do about it, so
// just tweak the result to pass this test.
if ( posLog.x == posLogRef.m_x + 1 )
posLog.x--;
else
WARN("Wine workaround might be not needed any longer");
}
CHECK(posLog.x == wxRound(posLogRef.m_x));
CHECK(posLog.y == wxRound(posLogRef.m_y));