1// Copyright 2014 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#include "content/browser/renderer_host/software_layer_mac.h" 6 7#include "base/debug/trace_event.h" 8#include "base/mac/mac_util.h" 9#include "base/mac/scoped_cftyperef.h" 10#include "base/mac/sdk_forward_declarations.h" 11#include "ui/base/cocoa/animation_utils.h" 12 13@implementation SoftwareLayer 14 15- (id)init { 16 if (self = [super init]) { 17 [self setBackgroundColor:CGColorGetConstantColor(kCGColorWhite)]; 18 [self setAnchorPoint:CGPointMake(0, 0)]; 19 // Setting contents gravity is necessary to prevent the layer from being 20 // scaled during dyanmic resizes (especially with devtools open). 21 [self setContentsGravity:kCAGravityTopLeft]; 22 } 23 return self; 24} 25 26- (void)setContentsToData:(const void *)data 27 withRowBytes:(size_t)rowBytes 28 withPixelSize:(gfx::Size)pixelSize 29 withScaleFactor:(float)scaleFactor { 30 TRACE_EVENT0("browser", "-[SoftwareLayer setContentsToData]"); 31 32 // Disable animating the contents change or the scale factor change. 33 ScopedCAActionDisabler disabler; 34 35 // Set the contents of the software CALayer to be a CGImage with the provided 36 // pixel data. Make a copy of the data before backing the image with them, 37 // because the same buffer will be reused for the next frame. 38 base::ScopedCFTypeRef<CFDataRef> dataCopy( 39 CFDataCreate(NULL, 40 static_cast<const UInt8 *>(data), 41 rowBytes * pixelSize.height())); 42 base::ScopedCFTypeRef<CGDataProviderRef> dataProvider( 43 CGDataProviderCreateWithCFData(dataCopy)); 44 base::ScopedCFTypeRef<CGImageRef> image( 45 CGImageCreate(pixelSize.width(), 46 pixelSize.height(), 47 8, 48 32, 49 rowBytes, 50 base::mac::GetSystemColorSpace(), 51 kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host, 52 dataProvider, 53 NULL, 54 false, 55 kCGRenderingIntentDefault)); 56 [self setContents:(id)image.get()]; 57 58 // Set the contents scale of the software CALayer. 59 if ([self respondsToSelector:(@selector(contentsScale))] && 60 [self respondsToSelector:(@selector(setContentsScale:))] && 61 [self contentsScale] != scaleFactor) { 62 [self setContentsScale:scaleFactor]; 63 } 64} 65 66@end 67