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| 1 /* | |
| 2 * Copyright (C) 2007 Apple Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * 1. Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer in the | |
| 11 * documentation and/or other materials provided with the distribution. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
| 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #include "config.h" | |
| 27 #include "core/platform/DragImage.h" | |
| 28 | |
| 29 #include "platform/fonts/Font.h" | |
| 30 #include "platform/fonts/FontCache.h" | |
| 31 #include "platform/fonts/FontDescription.h" | |
| 32 #include "platform/fonts/FontMetrics.h" | |
| 33 #include "platform/geometry/FloatPoint.h" | |
| 34 #include "platform/geometry/FloatRect.h" | |
| 35 #include "platform/geometry/IntPoint.h" | |
| 36 #include "platform/graphics/BitmapImage.h" | |
| 37 #include "platform/graphics/Color.h" | |
| 38 #include "platform/graphics/GraphicsContext.h" | |
| 39 #include "platform/graphics/Image.h" | |
| 40 #include "platform/graphics/ImageBuffer.h" | |
| 41 #include "platform/graphics/skia/NativeImageSkia.h" | |
| 42 #include "platform/text/StringTruncator.h" | |
| 43 #include "platform/text/TextRun.h" | |
| 44 #include "platform/transforms/AffineTransform.h" | |
| 45 #include "platform/weborigin/KURL.h" | |
| 46 #include "skia/ext/image_operations.h" | |
| 47 #include "third_party/skia/include/core/SkCanvas.h" | |
| 48 #include "third_party/skia/include/core/SkMatrix.h" | |
| 49 #include "wtf/PassOwnPtr.h" | |
| 50 #include "wtf/RefPtr.h" | |
| 51 #include "wtf/text/WTFString.h" | |
| 52 | |
| 53 #include <algorithm> | |
| 54 | |
| 55 namespace WebCore { | |
| 56 | |
| 57 const float kDragLabelBorderX = 4; | |
| 58 // Keep border_y in synch with DragController::LinkDragBorderInset. | |
| 59 const float kDragLabelBorderY = 2; | |
| 60 const float kLabelBorderYOffset = 2; | |
| 61 | |
| 62 const float kMaxDragLabelWidth = 300; | |
| 63 const float kMaxDragLabelStringWidth = (kMaxDragLabelWidth - 2 * kDragLabelBorde
rX); | |
| 64 | |
| 65 const float kDragLinkLabelFontSize = 11; | |
| 66 const float kDragLinkUrlFontSize = 10; | |
| 67 | |
| 68 PassOwnPtr<DragImage> DragImage::create(Image* image, RespectImageOrientationEnu
m shouldRespectImageOrientation) | |
| 69 { | |
| 70 if (!image) | |
| 71 return nullptr; | |
| 72 | |
| 73 RefPtr<NativeImageSkia> bitmap = image->nativeImageForCurrentFrame(); | |
| 74 if (!bitmap) | |
| 75 return nullptr; | |
| 76 | |
| 77 if (image->isBitmapImage()) { | |
| 78 ImageOrientation orientation = DefaultImageOrientation; | |
| 79 BitmapImage* bitmapImage = toBitmapImage(image); | |
| 80 IntSize sizeRespectingOrientation = bitmapImage->sizeRespectingOrientati
on(); | |
| 81 | |
| 82 if (shouldRespectImageOrientation == RespectImageOrientation) | |
| 83 orientation = bitmapImage->currentFrameOrientation(); | |
| 84 | |
| 85 if (orientation != DefaultImageOrientation) { | |
| 86 FloatRect destRect(FloatPoint(), sizeRespectingOrientation); | |
| 87 if (orientation.usesWidthAsHeight()) | |
| 88 destRect = destRect.transposedRect(); | |
| 89 | |
| 90 SkBitmap skBitmap; | |
| 91 skBitmap.setConfig( | |
| 92 SkBitmap::kARGB_8888_Config, sizeRespectingOrientation.width(),
sizeRespectingOrientation.height()); | |
| 93 if (!skBitmap.allocPixels()) | |
| 94 return nullptr; | |
| 95 | |
| 96 SkCanvas canvas(skBitmap); | |
| 97 canvas.concat(affineTransformToSkMatrix(orientation.transformFromDef
ault(sizeRespectingOrientation))); | |
| 98 canvas.drawBitmapRect(bitmap->bitmap(), 0, destRect); | |
| 99 | |
| 100 return adoptPtr(new DragImage(skBitmap, bitmap->resolutionScale())); | |
| 101 } | |
| 102 } | |
| 103 | |
| 104 SkBitmap skBitmap; | |
| 105 if (!bitmap->bitmap().copyTo(&skBitmap, SkBitmap::kARGB_8888_Config)) | |
| 106 return nullptr; | |
| 107 return adoptPtr(new DragImage(skBitmap, bitmap->resolutionScale())); | |
| 108 } | |
| 109 | |
| 110 static Font deriveDragLabelFont(int size, FontWeight fontWeight, const FontDescr
iption& systemFont) | |
| 111 { | |
| 112 FontDescription description = systemFont; | |
| 113 description.setWeight(fontWeight); | |
| 114 description.setSpecifiedSize(size); | |
| 115 description.setComputedSize(size); | |
| 116 Font result(description, 0, 0); | |
| 117 result.update(0); | |
| 118 return result; | |
| 119 } | |
| 120 | |
| 121 PassOwnPtr<DragImage> DragImage::create(const KURL& url, const String& inLabel,
const FontDescription& systemFont, float deviceScaleFactor) | |
| 122 { | |
| 123 const Font labelFont = deriveDragLabelFont(kDragLinkLabelFontSize, FontWeigh
tBold, systemFont); | |
| 124 const Font urlFont = deriveDragLabelFont(kDragLinkUrlFontSize, FontWeightNor
mal, systemFont); | |
| 125 FontCachePurgePreventer fontCachePurgePreventer; | |
| 126 | |
| 127 bool drawURLString = true; | |
| 128 bool clipURLString = false; | |
| 129 bool clipLabelString = false; | |
| 130 | |
| 131 String urlString = url.string(); | |
| 132 String label = inLabel; | |
| 133 if (label.isEmpty()) { | |
| 134 drawURLString = false; | |
| 135 label = urlString; | |
| 136 } | |
| 137 | |
| 138 // First step is drawing the link drag image width. | |
| 139 TextRun labelRun(label.impl()); | |
| 140 TextRun urlRun(urlString.impl()); | |
| 141 IntSize labelSize(labelFont.width(labelRun), labelFont.fontMetrics().ascent(
) + labelFont.fontMetrics().descent()); | |
| 142 | |
| 143 if (labelSize.width() > kMaxDragLabelStringWidth) { | |
| 144 labelSize.setWidth(kMaxDragLabelStringWidth); | |
| 145 clipLabelString = true; | |
| 146 } | |
| 147 | |
| 148 IntSize urlStringSize; | |
| 149 IntSize imageSize(labelSize.width() + kDragLabelBorderX * 2, labelSize.heigh
t() + kDragLabelBorderY * 2); | |
| 150 | |
| 151 if (drawURLString) { | |
| 152 urlStringSize.setWidth(urlFont.width(urlRun)); | |
| 153 urlStringSize.setHeight(urlFont.fontMetrics().ascent() + urlFont.fontMet
rics().descent()); | |
| 154 imageSize.setHeight(imageSize.height() + urlStringSize.height()); | |
| 155 if (urlStringSize.width() > kMaxDragLabelStringWidth) { | |
| 156 imageSize.setWidth(kMaxDragLabelWidth); | |
| 157 clipURLString = true; | |
| 158 } else | |
| 159 imageSize.setWidth(std::max(labelSize.width(), urlStringSize.width()
) + kDragLabelBorderX * 2); | |
| 160 } | |
| 161 | |
| 162 // We now know how big the image needs to be, so we create and | |
| 163 // fill the background | |
| 164 IntSize scaledImageSize = imageSize; | |
| 165 scaledImageSize.scale(deviceScaleFactor); | |
| 166 OwnPtr<ImageBuffer> buffer(ImageBuffer::create(scaledImageSize)); | |
| 167 if (!buffer) | |
| 168 return nullptr; | |
| 169 buffer->context()->scale(FloatSize(deviceScaleFactor, deviceScaleFactor)); | |
| 170 | |
| 171 const float DragLabelRadius = 5; | |
| 172 const IntSize radii(DragLabelRadius, DragLabelRadius); | |
| 173 IntRect rect(IntPoint(), imageSize); | |
| 174 const Color backgroundColor(140, 140, 140); | |
| 175 buffer->context()->fillRoundedRect(rect, radii, radii, radii, radii, backgro
undColor); | |
| 176 | |
| 177 // Draw the text | |
| 178 if (drawURLString) { | |
| 179 if (clipURLString) | |
| 180 urlString = StringTruncator::centerTruncate(urlString, imageSize.wid
th() - (kDragLabelBorderX * 2.0f), urlFont, StringTruncator::EnableRoundingHacks
); | |
| 181 IntPoint textPos(kDragLabelBorderX, imageSize.height() - (kLabelBorderYO
ffset + urlFont.fontMetrics().descent())); | |
| 182 TextRun textRun(urlString); | |
| 183 buffer->context()->drawText(urlFont, TextRunPaintInfo(textRun), textPos)
; | |
| 184 } | |
| 185 | |
| 186 if (clipLabelString) | |
| 187 label = StringTruncator::rightTruncate(label, imageSize.width() - (kDrag
LabelBorderX * 2.0f), labelFont, StringTruncator::EnableRoundingHacks); | |
| 188 | |
| 189 IntPoint textPos(kDragLabelBorderX, kDragLabelBorderY + labelFont.pixelSize(
)); | |
| 190 TextRun textRun(label); | |
| 191 buffer->context()->drawText(urlFont, TextRunPaintInfo(textRun), textPos); | |
| 192 | |
| 193 RefPtr<Image> image = buffer->copyImage(); | |
| 194 return DragImage::create(image.get()); | |
| 195 } | |
| 196 | |
| 197 DragImage::DragImage(const SkBitmap& bitmap, float resolutionScale) | |
| 198 : m_bitmap(bitmap) | |
| 199 , m_resolutionScale(resolutionScale) | |
| 200 { | |
| 201 } | |
| 202 | |
| 203 DragImage::~DragImage() | |
| 204 { | |
| 205 } | |
| 206 | |
| 207 void DragImage::fitToMaxSize(const IntSize& srcSize, const IntSize& maxSize) | |
| 208 { | |
| 209 float heightResizeRatio = 0.0f; | |
| 210 float widthResizeRatio = 0.0f; | |
| 211 float resizeRatio = -1.0f; | |
| 212 IntSize originalSize = size(); | |
| 213 | |
| 214 if (srcSize.width() > maxSize.width()) { | |
| 215 widthResizeRatio = maxSize.width() / static_cast<float>(srcSize.width())
; | |
| 216 resizeRatio = widthResizeRatio; | |
| 217 } | |
| 218 | |
| 219 if (srcSize.height() > maxSize.height()) { | |
| 220 heightResizeRatio = maxSize.height() / static_cast<float>(srcSize.height
()); | |
| 221 if ((resizeRatio < 0.0f) || (resizeRatio > heightResizeRatio)) | |
| 222 resizeRatio = heightResizeRatio; | |
| 223 } | |
| 224 | |
| 225 if (srcSize == originalSize) { | |
| 226 if (resizeRatio > 0.0f) | |
| 227 scale(resizeRatio, resizeRatio); | |
| 228 return; | |
| 229 } | |
| 230 | |
| 231 // The image was scaled in the webpage so at minimum we must account for tha
t scaling | |
| 232 float scaleX = srcSize.width() / static_cast<float>(originalSize.width()); | |
| 233 float scaleY = srcSize.height() / static_cast<float>(originalSize.height()); | |
| 234 if (resizeRatio > 0.0f) { | |
| 235 scaleX *= resizeRatio; | |
| 236 scaleY *= resizeRatio; | |
| 237 } | |
| 238 | |
| 239 scale(scaleX, scaleY); | |
| 240 } | |
| 241 | |
| 242 void DragImage::scale(float scaleX, float scaleY) | |
| 243 { | |
| 244 int imageWidth = scaleX * m_bitmap.width(); | |
| 245 int imageHeight = scaleY * m_bitmap.height(); | |
| 246 m_bitmap = skia::ImageOperations::Resize( | |
| 247 m_bitmap, skia::ImageOperations::RESIZE_LANCZOS3, imageWidth, imageHeigh
t); | |
| 248 } | |
| 249 | |
| 250 void DragImage::dissolveToFraction(float fraction) | |
| 251 { | |
| 252 m_bitmap.setAlphaType(kPremul_SkAlphaType); | |
| 253 SkAutoLockPixels lock(m_bitmap); | |
| 254 | |
| 255 for (int row = 0; row < m_bitmap.height(); ++row) { | |
| 256 for (int column = 0; column < m_bitmap.width(); ++column) { | |
| 257 uint32_t* pixel = m_bitmap.getAddr32(column, row); | |
| 258 *pixel = SkPreMultiplyARGB( | |
| 259 SkColorGetA(*pixel) * fraction, | |
| 260 SkColorGetR(*pixel), | |
| 261 SkColorGetG(*pixel), | |
| 262 SkColorGetB(*pixel)); | |
| 263 } | |
| 264 } | |
| 265 } | |
| 266 | |
| 267 } // namespace WebCore | |
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Chromium Code Reviews
Issue 122353002:
Move DragImage from core/platform/ to platform/ (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master