2 * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
3 * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include "AffineTransform.h"
31 #include "BitmapImage.h"
32 #include "GraphicsContext.h"
35 #include "MIMETypeRegistry.h"
36 #include "SharedBuffer.h"
38 #include <wtf/MainThread.h>
39 #include <wtf/StdLibExtras.h>
42 #include <CoreFoundation/CoreFoundation.h>
47 Image::Image(ImageObserver* observer)
48 : m_imageObserver(observer)
56 Image* Image::nullImage()
58 ASSERT(isMainThread());
59 DEFINE_STATIC_LOCAL(RefPtr<Image>, nullImage, (BitmapImage::create()));;
60 return nullImage.get();
63 bool Image::supportsType(const String& type)
65 return MIMETypeRegistry::isSupportedImageResourceMIMEType(type);
68 bool Image::setData(PassRefPtr<SharedBuffer> data, bool allDataReceived)
74 int length = m_data->size();
78 return dataChanged(allDataReceived);
81 void Image::fillWithSolidColor(GraphicsContext* ctxt, const FloatRect& dstRect, const Color& color, ColorSpace styleColorSpace, CompositeOperator op)
83 if (color.alpha() <= 0)
86 CompositeOperator previousOperator = ctxt->compositeOperation();
87 ctxt->setCompositeOperation(!color.hasAlpha() && op == CompositeSourceOver ? CompositeCopy : op);
88 ctxt->fillRect(dstRect, color, styleColorSpace);
89 ctxt->setCompositeOperation(previousOperator);
92 void Image::draw(GraphicsContext* ctx, const FloatRect& dstRect, const FloatRect& srcRect, ColorSpace styleColorSpace, CompositeOperator op, RespectImageOrientationEnum)
94 draw(ctx, dstRect, srcRect, styleColorSpace, op);
97 void Image::drawTiled(GraphicsContext* ctxt, const FloatRect& destRect, const FloatPoint& srcPoint, const FloatSize& scaledTileSize, ColorSpace styleColorSpace, CompositeOperator op)
99 if (mayFillWithSolidColor()) {
100 fillWithSolidColor(ctxt, destRect, solidColor(), styleColorSpace, op);
104 // See <https://webkit.org/b/59043>.
106 ASSERT(!isBitmapImage() || notSolidColor());
109 FloatSize intrinsicTileSize = size();
110 if (hasRelativeWidth())
111 intrinsicTileSize.setWidth(scaledTileSize.width());
112 if (hasRelativeHeight())
113 intrinsicTileSize.setHeight(scaledTileSize.height());
115 FloatSize scale(scaledTileSize.width() / intrinsicTileSize.width(),
116 scaledTileSize.height() / intrinsicTileSize.height());
118 FloatRect oneTileRect;
119 oneTileRect.setX(destRect.x() + fmodf(fmodf(-srcPoint.x(), scaledTileSize.width()) - scaledTileSize.width(), scaledTileSize.width()));
120 oneTileRect.setY(destRect.y() + fmodf(fmodf(-srcPoint.y(), scaledTileSize.height()) - scaledTileSize.height(), scaledTileSize.height()));
121 oneTileRect.setSize(scaledTileSize);
123 // Check and see if a single draw of the image can cover the entire area we are supposed to tile.
124 if (oneTileRect.contains(destRect)) {
125 FloatRect visibleSrcRect;
126 visibleSrcRect.setX((destRect.x() - oneTileRect.x()) / scale.width());
127 visibleSrcRect.setY((destRect.y() - oneTileRect.y()) / scale.height());
128 visibleSrcRect.setWidth(destRect.width() / scale.width());
129 visibleSrcRect.setHeight(destRect.height() / scale.height());
130 draw(ctxt, destRect, visibleSrcRect, styleColorSpace, op);
134 AffineTransform patternTransform = AffineTransform().scaleNonUniform(scale.width(), scale.height());
135 FloatRect tileRect(FloatPoint(), intrinsicTileSize);
136 drawPattern(ctxt, tileRect, patternTransform, oneTileRect.location(), styleColorSpace, op, destRect);
141 // FIXME: Merge with the other drawTiled eventually, since we need a combination of both for some things.
142 void Image::drawTiled(GraphicsContext* ctxt, const FloatRect& dstRect, const FloatRect& srcRect,
143 const FloatSize& tileScaleFactor, TileRule hRule, TileRule vRule, ColorSpace styleColorSpace, CompositeOperator op)
145 if (mayFillWithSolidColor()) {
146 fillWithSolidColor(ctxt, dstRect, solidColor(), styleColorSpace, op);
150 // FIXME: We do not support 'round' or 'space' yet. For now just map them to 'repeat'.
151 if (hRule == RoundTile || hRule == SpaceTile)
153 if (vRule == RoundTile || vRule == SpaceTile)
156 AffineTransform patternTransform = AffineTransform().scaleNonUniform(tileScaleFactor.width(), tileScaleFactor.height());
158 // We want to construct the phase such that the pattern is centered (when stretch is not
159 // set for a particular rule).
160 float hPhase = tileScaleFactor.width() * srcRect.x();
161 float vPhase = tileScaleFactor.height() * srcRect.y();
162 float scaledTileWidth = tileScaleFactor.width() * srcRect.width();
163 float scaledTileHeight = tileScaleFactor.height() * srcRect.height();
164 if (hRule == Image::RepeatTile)
165 hPhase -= (dstRect.width() - scaledTileWidth) / 2;
166 if (vRule == Image::RepeatTile)
167 vPhase -= (dstRect.height() - scaledTileHeight) / 2;
168 FloatPoint patternPhase(dstRect.x() - hPhase, dstRect.y() - vPhase);
170 drawPattern(ctxt, srcRect, patternTransform, patternPhase, styleColorSpace, op, dstRect);
175 #if ENABLE(IMAGE_DECODER_DOWN_SAMPLING)
176 FloatRect Image::adjustSourceRectForDownSampling(const FloatRect& srcRect, const IntSize& scaledSize) const
178 const IntSize unscaledSize = size();
179 if (unscaledSize == scaledSize)
182 // Image has been down-sampled.
183 float xscale = static_cast<float>(scaledSize.width()) / unscaledSize.width();
184 float yscale = static_cast<float>(scaledSize.height()) / unscaledSize.height();
185 FloatRect scaledSrcRect = srcRect;
186 scaledSrcRect.scale(xscale, yscale);
188 return scaledSrcRect;
192 void Image::computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio)
194 intrinsicRatio = size();
195 intrinsicWidth = Length(intrinsicRatio.width(), Fixed);
196 intrinsicHeight = Length(intrinsicRatio.height(), Fixed);