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Don't crash due to accessing invalid bitmaps in wxAUI code

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Neither GetWidth() nor GetScaledWidth() (nor the corresponding
height-related methods) can be called if the bitmap is invalid and the
resulting assert led to a crash when it happened in wxAuiToolBarArt
drawing code, as it was triggered on each redraw.

Just use bitmap size of (0, 0) if we're not going to draw it anyhow.

Closes #18263.
This commit is contained in:
Vadim Zeitlin 2018-10-31 23:43:17 +01:00
parent a316942c18
commit c01328c2da
1 changed files with 13 additions and 12 deletions
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25
src/aui/auibar.cpp
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@ -293,15 +293,21 @@ void wxAuiGenericToolBarArt::DrawButton(
int bmpX = 0, bmpY = 0;
int textX = 0, textY = 0;
const wxBitmap& bmp = item.GetState() & wxAUI_BUTTON_STATE_DISABLED
? item.GetDisabledBitmap()
: item.GetBitmap();
const wxSize bmpSize = bmp.IsOk() ? bmp.GetScaledSize() : wxSize(0, 0);
if (m_textOrientation == wxAUI_TBTOOL_TEXT_BOTTOM)
{
bmpX = rect.x +
(rect.width/2) -
(item.GetBitmap().GetScaledWidth()/2);
(bmpSize.x/2);
bmpY = rect.y +
((rect.height-textHeight)/2) -
(item.GetBitmap().GetScaledHeight()/2);
(bmpSize.y/2);
textX = rect.x + (rect.width/2) - (textWidth/2) + 1;
textY = rect.y + rect.height - textHeight - 1;
@ -312,9 +318,9 @@ void wxAuiGenericToolBarArt::DrawButton(
bmpY = rect.y +
(rect.height/2) -
(item.GetBitmap().GetScaledHeight()/2);
(bmpSize.y/2);
textX = bmpX + wnd->FromDIP(3) + item.GetBitmap().GetScaledWidth();
textX = bmpX + wnd->FromDIP(3) + bmpSize.x;
textY = rect.y +
(rect.height/2) -
(textHeight/2);
@ -351,12 +357,6 @@ void wxAuiGenericToolBarArt::DrawButton(
}
}
wxBitmap bmp;
if (item.GetState() & wxAUI_BUTTON_STATE_DISABLED)
bmp = item.GetDisabledBitmap();
else
bmp = item.GetBitmap();
if ( bmp.IsOk() )
dc.DrawBitmap(bmp, bmpX, bmpY, true);
@ -596,8 +596,9 @@ wxSize wxAuiGenericToolBarArt::GetToolSize(
if (!item.GetBitmap().IsOk() && !(m_flags & wxAUI_TB_TEXT))
return wnd->FromDIP(wxSize(16,16));
int width = item.GetBitmap().GetScaledWidth();
int height = item.GetBitmap().GetScaledHeight();
const wxBitmap& bmp = item.GetBitmap();
int width = bmp.IsOk() ? bmp.GetScaledWidth() : 0;
int height = bmp.IsOk() ? bmp.GetScaledHeight() : 0;
if (m_flags & wxAUI_TB_TEXT)
{