| /* |
| * Copyright (C) 2011 Kevin Ollivier <kevino@theolliviers.com> |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef LocalDC_h |
| #define LocalDC_h |
| |
| #include "IntRect.h" |
| |
| #include <wtf/Assertions.h> |
| |
| #include <wx/defs.h> |
| |
| #include <wx/bitmap.h> |
| #include <wx/dc.h> |
| #include <wx/dcmemory.h> |
| #include <wx/rawbmp.h> |
| |
| namespace WebCore { |
| |
| class LocalDC { |
| |
| public: |
| LocalDC(wxDC* host, const IntRect& r, bool transparent = false) |
| { |
| #ifndef __WXMAC__ |
| m_host = host; |
| int width = r.width(); |
| int height = r.height(); |
| // on MSW, some controls like scrollbars do not always draw properly when |
| // the bitmap is transparent. However, they draw into all pixels so this is |
| // not needed. So only make the bitmap transparent when needed. |
| int depth = 24; |
| if (transparent) |
| depth = 32; |
| m_bitmap = new wxBitmap(width, height, depth); |
| // we need the wxAlphaPixelData code to be in its own scope so that the |
| // pixData is deleted before we assign the bitmap to the wxMemoryDC, |
| // in order to avoid a copy. |
| if (transparent) |
| { |
| wxAlphaPixelData pixData(*m_bitmap, wxPoint(0,0), wxSize(width, height)); |
| ASSERT(pixData); |
| if (pixData) { |
| wxAlphaPixelData::Iterator p(pixData); |
| for (int y=0; y<height; y++) { |
| wxAlphaPixelData::Iterator rowStart = p; |
| for (int x=0; x<width; x++) { |
| p.Alpha() = 0; |
| ++p; |
| } |
| p = rowStart; |
| p.OffsetY(pixData, 1); |
| } |
| } |
| } |
| m_context = new wxMemoryDC(*m_bitmap); |
| m_context->SetDeviceOrigin(-r.x(), -r.y()); |
| m_rect = r; |
| #else |
| m_context = host; |
| #endif |
| } |
| |
| wxDC* context() { return m_context; } |
| |
| ~LocalDC() |
| { |
| #ifndef __WXMAC__ |
| delete m_context; |
| m_host->DrawBitmap(*m_bitmap, m_rect.x(), m_rect.y()); |
| delete m_bitmap; |
| #endif |
| } |
| |
| private: |
| wxDC* m_host; |
| wxDC* m_context; |
| wxBitmap* m_bitmap; |
| IntRect m_rect; |
| |
| }; |
| |
| } |
| |
| #endif // LocalDC_h |