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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/renderer_host/software_layer_mac.h"
#include "base/debug/trace_event.h"
#include "base/mac/mac_util.h"
#include "base/mac/scoped_cftyperef.h"
#include "base/mac/sdk_forward_declarations.h"
#include "ui/base/cocoa/animation_utils.h"
@implementation SoftwareLayer
- (id)init {
if (self = [super init]) {
[self setBackgroundColor:CGColorGetConstantColor(kCGColorWhite)];
[self setAnchorPoint:CGPointMake(0, 0)];
// Setting contents gravity is necessary to prevent the layer from being
// scaled during dyanmic resizes (especially with devtools open).
[self setContentsGravity:kCAGravityTopLeft];
}
return self;
}
- (void)setContentsToData:(const void *)data
withRowBytes:(size_t)rowBytes
withPixelSize:(gfx::Size)pixelSize
withScaleFactor:(float)scaleFactor {
TRACE_EVENT0("browser", "-[SoftwareLayer setContentsToData]");
// Disable animating the contents change or the scale factor change.
ScopedCAActionDisabler disabler;
// Set the contents of the software CALayer to be a CGImage with the provided
// pixel data. Make a copy of the data before backing the image with them,
// because the same buffer will be reused for the next frame.
base::ScopedCFTypeRef<CFDataRef> dataCopy(
CFDataCreate(NULL,
static_cast<const UInt8 *>(data),
rowBytes * pixelSize.height()));
base::ScopedCFTypeRef<CGDataProviderRef> dataProvider(
CGDataProviderCreateWithCFData(dataCopy));
base::ScopedCFTypeRef<CGImageRef> image(
CGImageCreate(pixelSize.width(),
pixelSize.height(),
8,
32,
rowBytes,
base::mac::GetSystemColorSpace(),
kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host,
dataProvider,
NULL,
false,
kCGRenderingIntentDefault));
[self setContents:(id)image.get()];
// Set the contents scale of the software CALayer.
if ([self respondsToSelector:(@selector(contentsScale))] &&
[self respondsToSelector:(@selector(setContentsScale:))] &&
[self contentsScale] != scaleFactor) {
[self setContentsScale:scaleFactor];
}
}
@end
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