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      1 /*
      2  * Copyright (C) 2009 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 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 
     28 #if USE(ACCELERATED_COMPOSITING)
     29 
     30 #include "WebLayer.h"
     31 
     32 #include "Font.h"
     33 #include "GraphicsLayer.h"
     34 
     35 namespace WebCore {
     36 
     37 using namespace std;
     38 
     39 void WebLayer::internalSetNeedsDisplay(const CGRect* dirtyRect)
     40 {
     41     if (m_owner) {
     42         if (m_owner->showRepaintCounter()) {
     43             CGRect layerBounds = bounds();
     44             CGRect repaintCounterRect = layerBounds;
     45             // We assume a maximum of 4 digits and a font size of 18.
     46             repaintCounterRect.size.width = 80;
     47             repaintCounterRect.size.height = 22;
     48             if (m_owner->contentsOrientation() == WebCore::GraphicsLayer::CompositingCoordinatesTopDown)
     49                 repaintCounterRect.origin.y = layerBounds.size.height - (layerBounds.origin.y + repaintCounterRect.size.height);
     50             WKCACFLayer::internalSetNeedsDisplay(&repaintCounterRect);
     51         }
     52         if (dirtyRect && m_owner->contentsOrientation() == WebCore::GraphicsLayer::CompositingCoordinatesTopDown) {
     53             CGRect flippedDirtyRect = *dirtyRect;
     54             flippedDirtyRect.origin.y = bounds().size.height - (flippedDirtyRect.origin.y + flippedDirtyRect.size.height);
     55             WKCACFLayer::internalSetNeedsDisplay(&flippedDirtyRect);
     56             return;
     57         }
     58     }
     59 
     60     WKCACFLayer::internalSetNeedsDisplay(dirtyRect);
     61 }
     62 
     63 void WebLayer::drawInContext(PlatformGraphicsContext* context)
     64 {
     65     if (!m_owner)
     66         return;
     67 
     68     CGContextSaveGState(context);
     69 
     70     CGRect layerBounds = bounds();
     71     if (m_owner->contentsOrientation() == WebCore::GraphicsLayer::CompositingCoordinatesTopDown) {
     72         CGContextScaleCTM(context, 1, -1);
     73         CGContextTranslateCTM(context, 0, -layerBounds.size.height);
     74     }
     75 
     76     if (m_owner->client()) {
     77         GraphicsContext graphicsContext(context);
     78 
     79         // It's important to get the clip from the context, because it may be significantly
     80         // smaller than the layer bounds (e.g. tiled layers)
     81         CGRect clipBounds = CGContextGetClipBoundingBox(context);
     82         IntRect clip(enclosingIntRect(clipBounds));
     83         m_owner->paintGraphicsLayerContents(graphicsContext, clip);
     84     }
     85 #ifndef NDEBUG
     86     else {
     87         ASSERT_NOT_REACHED();
     88 
     89         // FIXME: ideally we'd avoid calling -setNeedsDisplay on a layer that is a plain color,
     90         // so CA never makes backing store for it (which is what -setNeedsDisplay will do above).
     91         CGContextSetRGBFillColor(context, 0.0f, 1.0f, 0.0f, 1.0f);
     92         CGContextFillRect(context, layerBounds);
     93     }
     94 #endif
     95 
     96     if (m_owner->showRepaintCounter()) {
     97         String text = String::number(m_owner->incrementRepaintCount());
     98 
     99         CGContextSaveGState(context);
    100 
    101         // Make the background of the counter the same as the border color,
    102         // unless there is no border, then make it red
    103         float borderWidth = CACFLayerGetBorderWidth(layer());
    104         if (borderWidth > 0) {
    105             CGColorRef borderColor = CACFLayerGetBorderColor(layer());
    106             const CGFloat* colors = CGColorGetComponents(borderColor);
    107             CGContextSetRGBFillColor(context, colors[0], colors[1], colors[2], colors[3]);
    108         } else
    109             CGContextSetRGBFillColor(context, 1.0f, 0.0f, 0.0f, 0.8f);
    110 
    111         CGRect aBounds = layerBounds;
    112 
    113         aBounds.size.width = 10 + 10 * text.length();
    114         aBounds.size.height = 22;
    115         CGContextFillRect(context, aBounds);
    116 
    117         FontDescription desc;
    118 
    119         NONCLIENTMETRICS metrics;
    120         metrics.cbSize = sizeof(metrics);
    121         SystemParametersInfo(SPI_GETNONCLIENTMETRICS, metrics.cbSize, &metrics, 0);
    122         FontFamily family;
    123         family.setFamily(metrics.lfSmCaptionFont.lfFaceName);
    124         desc.setFamily(family);
    125 
    126         desc.setComputedSize(18);
    127 
    128         Font font = Font(desc, 0, 0);
    129         font.update(0);
    130 
    131         GraphicsContext cg(context);
    132         cg.setFillColor(Color::black, ColorSpaceDeviceRGB);
    133         cg.drawText(font, TextRun(text), IntPoint(aBounds.origin.x + 5, aBounds.origin.y + 17));
    134 
    135         CGContextRestoreGState(context);
    136     }
    137 
    138     CGContextRestoreGState(context);
    139 }
    140 
    141 }
    142 
    143 #endif // USE(ACCELERATED_COMPOSITING)
    144