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Implemented wxCairoRenderer::CreateSubBitmap method.

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This commit is contained in:
Artur Wieczorek
2016-03-24 21:12:40 +01:00
parent e37f1a84ce
commit d6afb66388
3 changed files with 38 additions and 11 deletions
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42
src/generic/graphicc.cpp
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@@ -2787,15 +2787,41 @@ wxGraphicsBitmap wxCairoRenderer::CreateBitmapFromNativeBitmap( void* bitmap )
}
wxGraphicsBitmap
wxCairoRenderer::CreateSubBitmap(const wxGraphicsBitmap& WXUNUSED(bitmap),
wxDouble WXUNUSED(x),
wxDouble WXUNUSED(y),
wxDouble WXUNUSED(w),
wxDouble WXUNUSED(h))
wxCairoRenderer::CreateSubBitmap(const wxGraphicsBitmap& bitmap,
wxDouble x, wxDouble y,
wxDouble w, wxDouble h)
{
wxGraphicsBitmap p;
wxFAIL_MSG("wxCairoRenderer::CreateSubBitmap is not implemented.");
return p;
ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
wxCHECK_MSG(!bitmap.IsNull(), wxNullGraphicsBitmap, wxS("Invalid bitmap"));
wxCairoBitmapData* dataSrc = static_cast<wxCairoBitmapData*>(bitmap.GetRefData());
cairo_surface_t* srcSurface = dataSrc->GetCairoSurface();
int srcWidth = cairo_image_surface_get_width(srcSurface);
int srcHeight = cairo_image_surface_get_height(srcSurface);
int dstWidth = wxRound(w);
int dstHeight = wxRound(h);
wxCHECK_MSG( x >= 0.0 && y >= 0.0 && dstWidth > 0 && dstHeight > 0 &&
x + dstWidth <= srcWidth && y + dstHeight <= srcHeight,
wxNullGraphicsBitmap, wxS("Invalid bitmap region"));
cairo_surface_t* dstSurface = cairo_surface_create_similar_image(srcSurface,
cairo_image_surface_get_format(srcSurface),
dstWidth, dstHeight);
cairo_t* cr = cairo_create(dstSurface);
cairo_set_source_surface(cr, srcSurface, -x, -y);
cairo_rectangle(cr, 0.0, 0.0, dstWidth, dstHeight);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_fill(cr);
cairo_destroy(cr);
wxGraphicsBitmap bmpRes;
bmpRes.SetRefData(new wxCairoBitmapData(this, dstSurface));
return bmpRes;
}
wxString wxCairoRenderer::GetName() const