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Qt5: respect canvas setting for antialiasing when enabling smooth transformations. issue #33011

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git-svn-id: trunk@57132 -
This commit is contained in:
zeljko 2018-01-20 19:30:51 +00:00
parent 784b31cbda
commit 1d8aa3615d
1 changed files with 22 additions and 6 deletions
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28
lcl/interfaces/qt5/qtobjects.pas
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@ -3434,6 +3434,8 @@ var
ScaledMask: QImageH;
NewRect: TRect;
ARenderHint: Boolean;
ATransformation: QtTransformationMode;
ARenderHints: QPainterRenderHints;
function NeedScaling: boolean;
var
@ -3568,9 +3570,17 @@ begin
ScaledImage := QImage_create();
try
QImage_copy(Image, ScaledImage, 0, 0, QImage_width(Image), QImage_height(Image));
// use smooth transformation when scaling image. issue #29883
{use smooth transformation when scaling image. issue #29883
check if antialiasing is on, if not then don''t call smoothTransform. issue #330011}
ARenderHints := QPainter_renderHints(Widget);
if (ARenderHints and QPainterAntialiasing <> 0) or (ARenderHints and QPainterSmoothPixmapTransform <> 0) or
(ARenderHints and QPainterHighQualityAntialiasing <> 0) then
ATransformation := QtSmoothTransformation
else
ATransformation := QtFastTransformation;
QImage_scaled(ScaledImage, ScaledImage, LocalRect.Right - LocalRect.Left,
LocalRect.Bottom - LocalRect.Top, QtIgnoreAspectRatio, QtSmoothTransformation);
LocalRect.Bottom - LocalRect.Top, QtIgnoreAspectRatio, ATransformation);
NewRect := sourceRect^;
NewRect.Right := (LocalRect.Right - LocalRect.Left) + sourceRect^.Left;
NewRect.Bottom := (LocalRect.Bottom - LocalRect.Top) + sourceRect^.Top;
@ -3580,13 +3590,19 @@ begin
end;
end else
begin
// smooth a bit. issue #29883
ARenderHint := QPainter_testRenderHint(Widget, QPainterSmoothPixmapTransform);
if (QImage_format(image) = QImageFormat_ARGB32) and (flags = QtAutoColor) and
{smooth a bit. issue #29883
check if antialiasing is on, if not then don''t call smoothTransform. issue #330011}
ARenderHints := QPainter_renderHints(Widget);
ARenderHint := (ARenderHints and QPainterAntialiasing <> 0) or (ARenderHints and QPainterSmoothPixmapTransform <> 0) or
(ARenderHints and QPainterHighQualityAntialiasing <> 0);
if ARenderHint and (QImage_format(image) = QImageFormat_ARGB32) and (flags = QtAutoColor) and
not EqualRect(LocalRect, sourceRect^) then
QPainter_setRenderHint(Widget, QPainterSmoothPixmapTransform, True);
QPainter_drawImage(Widget, PRect(@LocalRect), image, sourceRect, flags);
QPainter_setRenderHint(Widget, QPainterSmoothPixmapTransform, ARenderHint);
if ARenderHint then
QPainter_setRenderHint(Widget, QPainterSmoothPixmapTransform, not ARenderHint);
end;
end;
end;