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/*
* Copyright (C) 2005, 2006, 2007 Apple Inc. All rights reserved.
* (C) 2007 Graham Dennis (graham.dennis@gmail.com)
* (C) 2007 Eric Seidel <eric@webkit.org>
*
* 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.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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.
*/
#import "config.h"
#import "PixelDumpSupport.h"
#import "PixelDumpSupportCG.h"
#import "DumpRenderTree.h"
#import "TestRunner.h"
#import <CoreGraphics/CGBitmapContext.h>
#import <QuartzCore/QuartzCore.h>
#import <pal/spi/cg/CoreGraphicsSPI.h>
#import <pal/spi/cocoa/QuartzCoreSPI.h>
#import <wtf/Assertions.h>
#import <wtf/RefPtr.h>
#import <WebKit/WebCoreStatistics.h>
#import <WebKit/WebDocumentPrivate.h>
#import <WebKit/WebHTMLViewPrivate.h>
#import <WebKit/WebViewPrivate.h>
@interface WebView ()
- (BOOL)_flushCompositingChanges;
@end
static void paintRepaintRectOverlay(WebView* webView, CGContextRef context)
{
CGRect viewRect = NSRectToCGRect([webView bounds]);
CGContextSaveGState(context);
// Using a transparency layer is easier than futzing with clipping.
CGContextBeginTransparencyLayer(context, 0);
// Flip the context.
CGContextScaleCTM(context, 1, -1);
CGContextTranslateCTM(context, 0, -viewRect.size.height);
CGContextSetRGBFillColor(context, 0, 0, 0, static_cast<CGFloat>(0.66));
CGContextFillRect(context, viewRect);
NSArray *repaintRects = [webView trackedRepaintRects];
if (repaintRects) {
for (NSValue *value in repaintRects) {
CGRect currRect = NSRectToCGRect([value rectValue]);
CGContextClearRect(context, currRect);
}
}
CGContextEndTransparencyLayer(context);
CGContextRestoreGState(context);
}
static CGImageRef takeWindowSnapshot(CGSWindowID windowID, CGWindowImageOption imageOptions) CF_RETURNS_RETAINED
{
imageOptions |= kCGWindowImageBoundsIgnoreFraming | kCGWindowImageShouldBeOpaque;
return CGWindowListCreateImage(CGRectNull, kCGWindowListOptionIncludingWindow, windowID, imageOptions);
}
RefPtr<BitmapContext> createBitmapContextFromWebView(bool onscreen, bool incrementalRepaint, bool sweepHorizontally, bool drawSelectionRect)
{
WebView* view = [mainFrame webView];
// If the WebHTMLView uses accelerated compositing, we need for force the on-screen capture path
// and also force Core Animation to start its animations with -display since the DRT window has autodisplay disabled.
if ([view _isUsingAcceleratedCompositing])
onscreen = YES;
float deviceScaleFactor = [view _backingScaleFactor];
NSSize webViewSize = [view frame].size;
size_t pixelsWide = static_cast<size_t>(webViewSize.width * deviceScaleFactor);
size_t pixelsHigh = static_cast<size_t>(webViewSize.height * deviceScaleFactor);
size_t rowBytes = 0;
void* buffer = nullptr;
auto bitmapContext = createBitmapContext(pixelsWide, pixelsHigh, rowBytes, buffer);
if (!bitmapContext)
return nullptr;
CGContextRef context = bitmapContext->cgContext();
// The final scaling gets doubled on the screen capture surface when we use the hidpi backingScaleFactor value for CTM.
// This is a workaround to push the scaling back.
float scaleForCTM = onscreen ? 1 : [view _backingScaleFactor];
CGContextScaleCTM(context, scaleForCTM, scaleForCTM);
NSGraphicsContext *nsContext = [NSGraphicsContext graphicsContextWithGraphicsPort:context flipped:NO];
ASSERT(nsContext);
if (incrementalRepaint) {
if (sweepHorizontally) {
for (NSRect column = NSMakeRect(0, 0, 1, webViewSize.height); column.origin.x < webViewSize.width; column.origin.x++)
[view displayRectIgnoringOpacity:column inContext:nsContext];
} else {
for (NSRect line = NSMakeRect(0, 0, webViewSize.width, 1); line.origin.y < webViewSize.height; line.origin.y++)
[view displayRectIgnoringOpacity:line inContext:nsContext];
}
} else {
if (onscreen) {
// FIXME: This will break repaint testing if we have compositing in repaint tests.
// (displayWebView() painted gray over the webview, but we'll be making everything repaint again).
[view display];
[view _flushCompositingChanges];
[CATransaction flush];
[CATransaction synchronize];
// Ask the window server to provide us a composited version of the *real* window content including surfaces (i.e. OpenGL content)
// Note that the returned image might differ very slightly from the window backing because of dithering artifacts in the window server compositor.
NSWindow *window = [view window];
CGImageRef image = takeWindowSnapshot([window windowNumber], kCGWindowImageDefault);
if (image) {
// Work around <rdar://problem/17084993>; re-request the snapshot at kCGWindowImageNominalResolution if it was captured at the wrong scale.
CGFloat desiredSnapshotWidth = window.frame.size.width * deviceScaleFactor;
if (CGImageGetWidth(image) != desiredSnapshotWidth) {
CGImageRelease(image);
image = takeWindowSnapshot([window windowNumber], kCGWindowImageNominalResolution);
}
}
if (!image)
return nullptr;
CGContextDrawImage(context, CGRectMake(0, 0, CGImageGetWidth(image), CGImageGetHeight(image)), image);
CGImageRelease(image);
if ([view isTrackingRepaints])
paintRepaintRectOverlay(view, context);
} else {
// Call displayRectIgnoringOpacity for HiDPI tests since it ensures we paint directly into the context
// that we have appropriately sized and scaled.
[view displayRectIgnoringOpacity:[view bounds] inContext:nsContext];
if ([view isTrackingRepaints])
paintRepaintRectOverlay(view, context);
}
}
if (drawSelectionRect) {
NSView *documentView = [[mainFrame frameView] documentView];
ASSERT([documentView conformsToProtocol:@protocol(WebDocumentSelection)]);
NSRect rect = [documentView convertRect:[(id <WebDocumentSelection>)documentView selectionRect] fromView:nil];
CGContextSaveGState(context);
CGContextSetLineWidth(context, 1.0);
CGContextSetRGBStrokeColor(context, 1.0, 0.0, 0.0, 1.0);
CGContextStrokeRect(context, CGRectMake(rect.origin.x, rect.origin.y, rect.size.width, rect.size.height));
CGContextRestoreGState(context);
}
return bitmapContext;
}
RefPtr<BitmapContext> createPagedBitmapContext()
{
int pageWidthInPixels = TestRunner::viewWidth;
int pageHeightInPixels = TestRunner::viewHeight;
int numberOfPages = [mainFrame numberOfPagesWithPageWidth:pageWidthInPixels pageHeight:pageHeightInPixels];
size_t rowBytes = 0;
void* buffer = nullptr;
int totalHeight = numberOfPages * (pageHeightInPixels + 1) - 1;
auto bitmapContext = createBitmapContext(pageWidthInPixels, totalHeight, rowBytes, buffer);
CGContextRef context = bitmapContext->cgContext();
CGContextTranslateCTM(context, 0, totalHeight);
CGContextScaleCTM(context, 1, -1);
[mainFrame printToCGContext:context pageWidth:pageWidthInPixels pageHeight:pageHeightInPixels];
return bitmapContext;
}