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      1 /*
      2  * Copyright (C) 2006, 2007 Apple Inc.  All rights reserved.
      3  * Copyright (C) 2007-2009 Torch Mobile Inc.
      4  * Copyright (C) 2010 Patrick Gansterer <paroga (at) paroga.com>
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     16  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     18  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     19  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     20  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     22  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #include "config.h"
     28 #include "Image.h"
     29 
     30 #include "BitmapImage.h"
     31 #include "GraphicsContext.h"
     32 #include "ImageDecoder.h"
     33 #include "NotImplemented.h"
     34 #include "PlatformString.h"
     35 #include "SharedBuffer.h"
     36 #include "TransformationMatrix.h"
     37 #include "WinceGraphicsExtras.h"
     38 #include <wtf/OwnPtr.h>
     39 
     40 #include <windows.h>
     41 
     42 namespace WebCore {
     43 
     44 NativeImagePtr ImageFrame::asNewNativeImage() const
     45 {
     46     return SharedBitmap::create(m_backingStore, m_size, hasAlpha());
     47 }
     48 
     49 bool FrameData::clear(bool clearMetaData)
     50 {
     51     if (clearMetaData)
     52         m_haveMetadata = false;
     53 
     54     if (m_frame) {
     55         m_frame = 0;
     56         return true;
     57     }
     58 
     59     return false;
     60 }
     61 
     62 bool BitmapImage::getHBITMAPOfSize(HBITMAP bmp, LPSIZE size)
     63 {
     64     if (!bmp)
     65         return false;
     66 
     67     BITMAP bmpInfo;
     68     GetObject(bmp, sizeof(BITMAP), &bmpInfo);
     69 
     70     ASSERT(bmpInfo.bmBitsPixel == 32);
     71     int bufferSize = bmpInfo.bmWidthBytes * bmpInfo.bmHeight;
     72 
     73     OwnPtr<HDC> hdc(CreateCompatibleDC(0));
     74     HGDIOBJ hOldBmp = SelectObject(hdc.get(), bmp);
     75 
     76     {
     77         GraphicsContext gc(hdc.get());
     78 
     79         IntSize imageSize = BitmapImage::size();
     80         if (size)
     81             drawFrameMatchingSourceSize(&gc, FloatRect(0, 0, bmpInfo.bmWidth, bmpInfo.bmHeight), IntSize(*size), ColorSpaceDeviceRGB, CompositeCopy);
     82         else
     83             draw(&gc, FloatRect(0, 0, bmpInfo.bmWidth, bmpInfo.bmHeight), FloatRect(0, 0, imageSize.width(), imageSize.height()), ColorSpaceDeviceRGB, CompositeCopy);
     84     }
     85 
     86     SelectObject(hdc.get(), hOldBmp);
     87 
     88     return true;
     89 }
     90 
     91 void BitmapImage::drawFrameMatchingSourceSize(GraphicsContext* ctxt, const FloatRect& dstRect, const IntSize& srcSize, ColorSpace styleColorSpace, CompositeOperator compositeOp)
     92 {
     93     int frames = frameCount();
     94     for (int i = 0; i < frames; ++i) {
     95         RefPtr<SharedBitmap> bmp = frameAtIndex(i);
     96         if (!bmp || bmp->height() != static_cast<unsigned>(srcSize.height()) || bmp->width() != static_cast<unsigned>(srcSize.width()))
     97             continue;
     98 
     99         size_t currentFrame = m_currentFrame;
    100         m_currentFrame = i;
    101         draw(ctxt, dstRect, FloatRect(0, 0, srcSize.width(), srcSize.height()), styleColorSpace, compositeOp);
    102         m_currentFrame = currentFrame;
    103         return;
    104     }
    105 
    106     // No image of the correct size was found, fallback to drawing the current frame
    107     IntSize imageSize = BitmapImage::size();
    108     draw(ctxt, dstRect, FloatRect(0, 0, imageSize.width(), imageSize.height()), styleColorSpace, compositeOp);
    109 }
    110 
    111 void BitmapImage::draw(GraphicsContext* ctxt, const FloatRect& dstRect, const FloatRect& srcRectIn, ColorSpace styleColorSpace, CompositeOperator compositeOp)
    112 {
    113     if (!m_source.initialized())
    114         return;
    115 
    116     if (mayFillWithSolidColor())
    117         fillWithSolidColor(ctxt, dstRect, solidColor(), styleColorSpace, compositeOp);
    118     else {
    119         IntRect intSrcRect(srcRectIn);
    120         RefPtr<SharedBitmap> bmp = frameAtIndex(m_currentFrame);
    121 
    122         if (bmp->width() != m_source.size().width()) {
    123             double scaleFactor = static_cast<double>(bmp->width()) / m_source.size().width();
    124 
    125             intSrcRect.setX(stableRound(srcRectIn.x() * scaleFactor));
    126             intSrcRect.setWidth(stableRound(srcRectIn.width() * scaleFactor));
    127             intSrcRect.setY(stableRound(srcRectIn.y() * scaleFactor));
    128             intSrcRect.setHeight(stableRound(srcRectIn.height() * scaleFactor));
    129         }
    130         bmp->draw(ctxt, enclosingIntRect(dstRect), intSrcRect, styleColorSpace, compositeOp);
    131     }
    132 
    133     startAnimation();
    134 }
    135 
    136 void Image::drawPattern(GraphicsContext* ctxt, const FloatRect& tileRect, const AffineTransform& patternTransform,
    137                         const FloatPoint& phase, ColorSpace styleColorSpace, CompositeOperator op, const FloatRect& destRect)
    138 {
    139     notImplemented();
    140 }
    141 
    142 void BitmapImage::drawPattern(GraphicsContext* ctxt, const FloatRect& tileRectIn, const AffineTransform& patternTransform,
    143                         const FloatPoint& phase, ColorSpace styleColorSpace, CompositeOperator op, const FloatRect& destRect)
    144 {
    145     RefPtr<SharedBitmap> bmp = nativeImageForCurrentFrame();
    146     if (!bmp)
    147         return;
    148 
    149     bmp->drawPattern(ctxt, tileRectIn, patternTransform, phase, styleColorSpace, op, destRect, m_source.size());
    150 }
    151 
    152 void BitmapImage::checkForSolidColor()
    153 {
    154     if (m_checkedForSolidColor)
    155         return;
    156 
    157     if (frameCount() != 1) {
    158         m_isSolidColor = false;
    159         m_checkedForSolidColor = true;
    160         return;
    161     }
    162 
    163     RefPtr<SharedBitmap> bmp = frameAtIndex(0);
    164     if (!bmp || !bmp->validHeight()) {
    165         m_isSolidColor = false;
    166         return;
    167     }
    168 
    169     if (bmp->width() != 1 || bmp->validHeight() != 1) {
    170         m_isSolidColor = false;
    171         m_checkedForSolidColor = true;
    172         return;
    173     }
    174 
    175     m_isSolidColor = true;
    176 
    177     if (bmp->is16bit()) {
    178         unsigned short c = ((unsigned short *)bmp->bytes())[0];
    179         int r = (c >> 7) & 0xF8;
    180         int g = (c >> 2) & 0xF8;
    181         int b = (c << 3) & 0xF8;
    182         if (bmp->usesTransparentColor() && bmp->transparentColor() == RGB(r, g, b))
    183             m_solidColor = Color(r, g, b, 0);
    184         else
    185             m_solidColor = Color(r, g, b);
    186     } else {
    187         unsigned c = ((unsigned *)bmp->bytes())[0];
    188         m_solidColor = Color(c);
    189     }
    190 
    191     if (bmp->validHeight() == bmp->height())
    192         m_checkedForSolidColor = true;
    193 }
    194 
    195 } // namespace WebCore
    196