/*
* 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 Computer, 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.
*/
#include "config.h"
#include "PixelDumpSupport.h"
#include "PixelDumpSupportCG.h"
#include "DumpRenderTree.h"
#include "LayoutTestController.h"
#include <CoreGraphics/CGBitmapContext.h>
#include <wtf/Assertions.h>
#include <wtf/RefPtr.h>
#import <WebKit/WebDocumentPrivate.h>
#import <WebKit/WebHTMLViewPrivate.h>
#import <WebKit/WebKit.h>
#import <WebKit/WebViewPrivate.h>
#if defined(BUILDING_ON_TIGER)
#include <OpenGL/OpenGL.h>
#include <OpenGL/CGLMacro.h>
#endif
// To ensure pixel tests consistency, we need to always render in the same colorspace.
// Unfortunately, because of AppKit / WebKit constraints, we can't render directly in the colorspace of our choice.
// This implies we have to temporarily change the profile of the main display to the colorspace we want to render into.
// We also need to make sure the CGBitmapContext we return is in that same colorspace.
#define PROFILE_PATH "/System/Library/ColorSync/Profiles/Generic RGB Profile.icc" // FIXME: This cannot be more than CS_MAX_PATH (256 characters)
static CMProfileLocation sInitialProfileLocation; // The locType field is initialized to 0 which is the same as cmNoProfileBase
void restoreMainDisplayColorProfile(int ignored)
{
// This is used as a signal handler, and thus the calls into ColorSync are unsafe
// But we might as well try to restore the user's color profile, we're going down anyway...
if (sInitialProfileLocation.locType != cmNoProfileBase) {
const CMDeviceScope scope = { kCFPreferencesCurrentUser, kCFPreferencesCurrentHost };
int error = CMSetDeviceProfile(cmDisplayDeviceClass, (CMDeviceID)kCGDirectMainDisplay, &scope, cmDefaultProfileID, &sInitialProfileLocation);
if (error)
fprintf(stderr, "Failed to restore initial color profile for main display! Open System Preferences > Displays > Color and manually re-select the profile. (Error: %i)", error);
sInitialProfileLocation.locType = cmNoProfileBase;
}
}
void setupMainDisplayColorProfile()
{
const CMDeviceScope scope = { kCFPreferencesCurrentUser, kCFPreferencesCurrentHost };
int error;
CMProfileRef profile = 0;
error = CMGetProfileByAVID((CMDisplayIDType)kCGDirectMainDisplay, &profile);
if (!error) {
UInt32 size = sizeof(CMProfileLocation);
error = NCMGetProfileLocation(profile, &sInitialProfileLocation, &size);
CMCloseProfile(profile);
}
if (error) {
fprintf(stderr, "Failed to retrieve current color profile for main display, thus it won't be changed. Many pixel tests may fail as a result. (Error: %i)", error);
sInitialProfileLocation.locType = cmNoProfileBase;
return;
}
CMProfileLocation location;
location.locType = cmPathBasedProfile;
strcpy(location.u.pathLoc.path, PROFILE_PATH);
error = CMSetDeviceProfile(cmDisplayDeviceClass, (CMDeviceID)kCGDirectMainDisplay, &scope, cmDefaultProfileID, &location);
if (error) {
fprintf(stderr, "Failed to set color profile for main display! Many pixel tests may fail as a result. (Error: %i)", error);
sInitialProfileLocation.locType = cmNoProfileBase;
return;
}
// Other signals are handled in installSignalHandlers() which also calls restoreMainDisplayColorProfile()
signal(SIGINT, restoreMainDisplayColorProfile);
signal(SIGHUP, restoreMainDisplayColorProfile);
signal(SIGTERM, restoreMainDisplayColorProfile);
}
PassRefPtr<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;
NSSize webViewSize = [view frame].size;
size_t pixelsWide = static_cast<size_t>(webViewSize.width);
size_t pixelsHigh = static_cast<size_t>(webViewSize.height);
size_t rowBytes = (4 * pixelsWide + 63) & ~63; // Use a multiple of 64 bytes to improve CG performance
void *buffer = calloc(pixelsHigh, rowBytes);
if (!buffer)
return 0;
static CGColorSpaceRef colorSpace = 0;
if (!colorSpace) {
CMProfileLocation location;
location.locType = cmPathBasedProfile;
strcpy(location.u.pathLoc.path, PROFILE_PATH);
CMProfileRef profile;
if (CMOpenProfile(&profile, &location) == noErr) {
colorSpace = CGColorSpaceCreateWithPlatformColorSpace(profile);
CMCloseProfile(profile);
}
}
CGContextRef context = CGBitmapContextCreate(buffer, pixelsWide, pixelsHigh, 8, rowBytes, colorSpace, kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host); // Use ARGB8 on PPC or BGRA8 on X86 to improve CG performance
if (!context) {
free(buffer);
return 0;
}
// The BitmapContext keeps the CGContextRef and the pixel buffer alive
RefPtr<BitmapContext> bitmapContext = BitmapContext::createByAdoptingBitmapAndContext(buffer, context);
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) {
#if !defined(BUILDING_ON_TIGER)
// displayIfNeeded does not update the CA layers if the layer-hosting view was not marked as needing display, so
// we're at the mercy of CA's display-link callback to update layers in time. So we need to force a display of the view
// to get AppKit to update the CA layers synchronously.
// 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];
// 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
CGImageRef image = CGWindowListCreateImage(CGRectNull, kCGWindowListOptionIncludingWindow, [[view window] windowNumber], kCGWindowImageBoundsIgnoreFraming | kCGWindowImageShouldBeOpaque);
CGContextDrawImage(context, CGRectMake(0, 0, CGImageGetWidth(image), CGImageGetHeight(image)), image);
CGImageRelease(image);
#else
// On 10.4 and earlier, we have to move the window temporarily "onscreen" and read directly from the display framebuffer using OpenGL
// In this code path, we need to ensure the window is above any other window or captured result will be corrupted
NSWindow *window = [view window];
int oldLevel = [window level];
NSRect oldFrame = [window frame];
NSRect newFrame = [[[NSScreen screens] objectAtIndex:0] frame];
newFrame = NSMakeRect(newFrame.origin.x + (newFrame.size.width - oldFrame.size.width) / 2, newFrame.origin.y + (newFrame.size.height - oldFrame.size.height) / 2, oldFrame.size.width, oldFrame.size.height);
[window setLevel:NSScreenSaverWindowLevel];
[window setFrame:newFrame display:NO animate:NO];
CGRect rect = CGRectMake(newFrame.origin.x, newFrame.origin.y, webViewSize.width, webViewSize.height);
CGDirectDisplayID displayID;
CGDisplayCount count;
if (CGGetDisplaysWithRect(rect, 1, &displayID, &count) == kCGErrorSuccess) {
CGRect bounds = CGDisplayBounds(displayID);
rect.origin.x -= bounds.origin.x;
rect.origin.y -= bounds.origin.y;
CGLPixelFormatAttribute attributes[] = {kCGLPFAAccelerated, kCGLPFANoRecovery, kCGLPFAFullScreen, kCGLPFADisplayMask, (CGLPixelFormatAttribute)CGDisplayIDToOpenGLDisplayMask(displayID), (CGLPixelFormatAttribute)0};
CGLPixelFormatObj pixelFormat;
GLint num;
if (CGLChoosePixelFormat(attributes, &pixelFormat, &num) == kCGLNoError) {
CGLContextObj cgl_ctx;
if (CGLCreateContext(pixelFormat, 0, &cgl_ctx) == kCGLNoError) {
if (CGLSetFullScreen(cgl_ctx) == kCGLNoError) {
void *flipBuffer = calloc(pixelsHigh, rowBytes);
if (flipBuffer) {
glPixelStorei(GL_PACK_ROW_LENGTH, rowBytes / 4);
glPixelStorei(GL_PACK_ALIGNMENT, 4);
#if __BIG_ENDIAN__
glReadPixels(rect.origin.x, rect.origin.y, rect.size.width, rect.size.height, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, flipBuffer);
#else
glReadPixels(rect.origin.x, rect.origin.y, rect.size.width, rect.size.height, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV, flipBuffer);
#endif
if (!glGetError()) {
for(size_t i = 0; i < pixelsHigh; ++i)
bcopy((char*)flipBuffer + rowBytes * i, (char*)buffer + rowBytes * (pixelsHigh - i - 1), pixelsWide * 4);
}
free(flipBuffer);
}
}
CGLDestroyContext(cgl_ctx);
}
CGLDestroyPixelFormat(pixelFormat);
}
}
[window setFrame:oldFrame display:NO animate:NO];
[window setLevel:oldLevel];
#endif
} else {
// Make sure the view has been painted.
[view displayIfNeeded];
// Grab directly the contents of the window backing buffer (this ignores any surfaces on the window)
// FIXME: This path is suboptimal: data is read from window backing store, converted to RGB8 then drawn again into an RGBA8 bitmap
[view lockFocus];
NSBitmapImageRep *imageRep = [[[NSBitmapImageRep alloc] initWithFocusedViewRect:[view frame]] autorelease];
[view unlockFocus];
RetainPtr<NSGraphicsContext> savedContext = [NSGraphicsContext currentContext];
[NSGraphicsContext setCurrentContext:nsContext];
[imageRep draw];
[NSGraphicsContext setCurrentContext:savedContext.get()];
}
}
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.release();
}