/* | |
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. | |
* | |
* 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. | |
*/ | |
#include "config.h" | |
#include "GraphicsContext.h" | |
#if PLATFORM(CG) | |
#include "GraphicsContextPlatformPrivateCG.h" | |
#elif PLATFORM(CAIRO) | |
#include "GraphicsContextPlatformPrivateCairo.h" | |
#endif | |
#include "AffineTransform.h" | |
#include "BitmapInfo.h" | |
#include "TransformationMatrix.h" | |
#include "NotImplemented.h" | |
#include "Path.h" | |
#include <wtf/MathExtras.h> | |
using namespace std; | |
namespace WebCore { | |
class SVGResourceImage; | |
static void fillWithClearColor(HBITMAP bitmap) | |
{ | |
BITMAP bmpInfo; | |
GetObject(bitmap, sizeof(bmpInfo), &bmpInfo); | |
int bufferSize = bmpInfo.bmWidthBytes * bmpInfo.bmHeight; | |
memset(bmpInfo.bmBits, 0, bufferSize); | |
} | |
bool GraphicsContext::inTransparencyLayer() const { return m_data->m_transparencyCount; } | |
void GraphicsContext::setShouldIncludeChildWindows(bool include) | |
{ | |
m_data->m_shouldIncludeChildWindows = include; | |
} | |
bool GraphicsContext::shouldIncludeChildWindows() const | |
{ | |
return m_data->m_shouldIncludeChildWindows; | |
} | |
GraphicsContext::WindowsBitmap::WindowsBitmap(HDC hdc, IntSize size) | |
: m_hdc(0) | |
, m_size(size) | |
{ | |
BitmapInfo bitmapInfo = BitmapInfo::create(m_size); | |
m_bitmap = CreateDIBSection(0, &bitmapInfo, DIB_RGB_COLORS, reinterpret_cast<void**>(&m_bitmapBuffer), 0, 0); | |
if (!m_bitmap) | |
return; | |
m_hdc = CreateCompatibleDC(hdc); | |
SelectObject(m_hdc, m_bitmap); | |
BITMAP bmpInfo; | |
GetObject(m_bitmap, sizeof(bmpInfo), &bmpInfo); | |
m_bytesPerRow = bmpInfo.bmWidthBytes; | |
m_bitmapBufferLength = bmpInfo.bmWidthBytes * bmpInfo.bmHeight; | |
SetGraphicsMode(m_hdc, GM_ADVANCED); | |
} | |
GraphicsContext::WindowsBitmap::~WindowsBitmap() | |
{ | |
if (!m_bitmap) | |
return; | |
DeleteDC(m_hdc); | |
DeleteObject(m_bitmap); | |
} | |
GraphicsContext::WindowsBitmap* GraphicsContext::createWindowsBitmap(IntSize size) | |
{ | |
return new WindowsBitmap(m_data->m_hdc, size); | |
} | |
HDC GraphicsContext::getWindowsContext(const IntRect& dstRect, bool supportAlphaBlend, bool mayCreateBitmap) | |
{ | |
// FIXME: Should a bitmap be created also when a shadow is set? | |
if (mayCreateBitmap && inTransparencyLayer()) { | |
if (dstRect.isEmpty()) | |
return 0; | |
// Create a bitmap DC in which to draw. | |
BitmapInfo bitmapInfo = BitmapInfo::create(dstRect.size()); | |
void* pixels = 0; | |
HBITMAP bitmap = ::CreateDIBSection(NULL, &bitmapInfo, DIB_RGB_COLORS, &pixels, 0, 0); | |
if (!bitmap) | |
return 0; | |
HDC bitmapDC = ::CreateCompatibleDC(m_data->m_hdc); | |
::SelectObject(bitmapDC, bitmap); | |
// Fill our buffer with clear if we're going to alpha blend. | |
if (supportAlphaBlend) | |
fillWithClearColor(bitmap); | |
// Make sure we can do world transforms. | |
SetGraphicsMode(bitmapDC, GM_ADVANCED); | |
// Apply a translation to our context so that the drawing done will be at (0,0) of the bitmap. | |
XFORM xform = TransformationMatrix().translate(-dstRect.x(), -dstRect.y()); | |
::SetWorldTransform(bitmapDC, &xform); | |
return bitmapDC; | |
} | |
m_data->flush(); | |
m_data->save(); | |
return m_data->m_hdc; | |
} | |
void GraphicsContextPlatformPrivate::save() | |
{ | |
if (!m_hdc) | |
return; | |
SaveDC(m_hdc); | |
} | |
void GraphicsContextPlatformPrivate::restore() | |
{ | |
if (!m_hdc) | |
return; | |
RestoreDC(m_hdc, -1); | |
} | |
void GraphicsContextPlatformPrivate::clip(const FloatRect& clipRect) | |
{ | |
if (!m_hdc) | |
return; | |
IntersectClipRect(m_hdc, clipRect.x(), clipRect.y(), clipRect.right(), clipRect.bottom()); | |
} | |
void GraphicsContextPlatformPrivate::clip(const Path&) | |
{ | |
notImplemented(); | |
} | |
void GraphicsContextPlatformPrivate::scale(const FloatSize& size) | |
{ | |
if (!m_hdc) | |
return; | |
XFORM xform = TransformationMatrix().scaleNonUniform(size.width(), size.height()); | |
ModifyWorldTransform(m_hdc, &xform, MWT_LEFTMULTIPLY); | |
} | |
static const double deg2rad = 0.017453292519943295769; // pi/180 | |
void GraphicsContextPlatformPrivate::rotate(float degreesAngle) | |
{ | |
XFORM xform = TransformationMatrix().rotate(degreesAngle); | |
ModifyWorldTransform(m_hdc, &xform, MWT_LEFTMULTIPLY); | |
} | |
void GraphicsContextPlatformPrivate::translate(float x , float y) | |
{ | |
if (!m_hdc) | |
return; | |
XFORM xform = TransformationMatrix().translate(x, y); | |
ModifyWorldTransform(m_hdc, &xform, MWT_LEFTMULTIPLY); | |
} | |
void GraphicsContextPlatformPrivate::concatCTM(const AffineTransform& transform) | |
{ | |
if (!m_hdc) | |
return; | |
XFORM xform = transform.toTransformationMatrix(); | |
ModifyWorldTransform(m_hdc, &xform, MWT_LEFTMULTIPLY); | |
} | |
#if ENABLE(SVG) | |
GraphicsContext* contextForImage(SVGResourceImage*) | |
{ | |
// FIXME: This should go in GraphicsContextCG.cpp | |
notImplemented(); | |
return 0; | |
} | |
#endif | |
} |