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25940efe7a
This has big improvement in the performance of GetImageData() because we make the snapshot lazily instead of using the vm_copy() method of CGBitmapContextCreateImage()
403 lines
11 KiB
C++
403 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Corporation code.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2009
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Jeff Muizelaar <jmuizelaar@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "SourceSurfaceCG.h"
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#include "DrawTargetCG.h"
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namespace mozilla {
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namespace gfx {
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SourceSurfaceCG::~SourceSurfaceCG()
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{
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CGImageRelease(mImage);
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}
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IntSize
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SourceSurfaceCG::GetSize() const
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{
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IntSize size;
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size.width = CGImageGetWidth(mImage);
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size.height = CGImageGetHeight(mImage);
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return size;
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}
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SurfaceFormat
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SourceSurfaceCG::GetFormat() const
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{
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return mFormat;
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}
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TemporaryRef<DataSourceSurface>
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SourceSurfaceCG::GetDataSurface()
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{
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//XXX: we should be more disciplined about who takes a reference and where
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CGImageRetain(mImage);
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RefPtr<DataSourceSurfaceCG> dataSurf =
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new DataSourceSurfaceCG(mImage);
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return dataSurf;
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}
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static void releaseCallback(void *info, const void *data, size_t size) {
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free(info);
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}
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bool
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SourceSurfaceCG::InitFromData(unsigned char *aData,
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const IntSize &aSize,
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int32_t aStride,
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SurfaceFormat aFormat)
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{
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//XXX: we should avoid creating this colorspace everytime
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CGColorSpaceRef colorSpace = NULL;
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CGBitmapInfo bitinfo = 0;
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CGDataProviderRef dataProvider = NULL;
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int bitsPerComponent = 0;
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int bitsPerPixel = 0;
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assert(aSize.width >= 0 && aSize.height >= 0);
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switch (aFormat) {
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case FORMAT_B8G8R8A8:
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colorSpace = CGColorSpaceCreateDeviceRGB();
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bitinfo = kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host;
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bitsPerComponent = 8;
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bitsPerPixel = 32;
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break;
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case FORMAT_B8G8R8X8:
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colorSpace = CGColorSpaceCreateDeviceRGB();
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bitinfo = kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Host;
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bitsPerComponent = 8;
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bitsPerPixel = 32;
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break;
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case FORMAT_A8:
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// XXX: why don't we set a colorspace here?
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bitsPerComponent = 8;
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bitsPerPixel = 8;
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};
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void *data = malloc(aStride * aSize.height);
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memcpy(data, aData, aStride * aSize.height);
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mFormat = aFormat;
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dataProvider = CGDataProviderCreateWithData (data,
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data,
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aSize.height * aStride,
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releaseCallback);
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if (aFormat == FORMAT_A8) {
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CGFloat decode[] = {1.0, 0.0};
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mImage = CGImageMaskCreate (aSize.width, aSize.height,
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bitsPerComponent,
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bitsPerPixel,
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aStride,
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dataProvider,
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decode,
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true);
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} else {
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mImage = CGImageCreate (aSize.width, aSize.height,
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bitsPerComponent,
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bitsPerPixel,
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aStride,
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colorSpace,
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bitinfo,
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dataProvider,
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NULL,
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true,
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kCGRenderingIntentDefault);
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}
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CGDataProviderRelease(dataProvider);
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CGColorSpaceRelease (colorSpace);
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return mImage != NULL;
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}
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DataSourceSurfaceCG::~DataSourceSurfaceCG()
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{
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CGImageRelease(mImage);
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free(CGBitmapContextGetData(mCg));
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CGContextRelease(mCg);
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}
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IntSize
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DataSourceSurfaceCG::GetSize() const
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{
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IntSize size;
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size.width = CGImageGetWidth(mImage);
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size.height = CGImageGetHeight(mImage);
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return size;
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}
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bool
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DataSourceSurfaceCG::InitFromData(unsigned char *aData,
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const IntSize &aSize,
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int32_t aStride,
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SurfaceFormat aFormat)
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{
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//XXX: we should avoid creating this colorspace everytime
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CGColorSpaceRef colorSpace = NULL;
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CGBitmapInfo bitinfo = 0;
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CGDataProviderRef dataProvider = NULL;
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int bitsPerComponent = 0;
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int bitsPerPixel = 0;
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switch (aFormat) {
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case FORMAT_B8G8R8A8:
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colorSpace = CGColorSpaceCreateDeviceRGB();
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bitinfo = kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host;
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bitsPerComponent = 8;
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bitsPerPixel = 32;
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break;
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case FORMAT_B8G8R8X8:
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colorSpace = CGColorSpaceCreateDeviceRGB();
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bitinfo = kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Host;
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bitsPerComponent = 8;
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bitsPerPixel = 32;
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break;
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case FORMAT_A8:
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// XXX: why don't we set a colorspace here?
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bitsPerComponent = 8;
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bitsPerPixel = 8;
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};
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void *data = malloc(aStride * aSize.height);
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memcpy(data, aData, aStride * aSize.height);
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//mFormat = aFormat;
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dataProvider = CGDataProviderCreateWithData (data,
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data,
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aSize.height * aStride,
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releaseCallback);
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if (aFormat == FORMAT_A8) {
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CGFloat decode[] = {1.0, 0.0};
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mImage = CGImageMaskCreate (aSize.width, aSize.height,
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bitsPerComponent,
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bitsPerPixel,
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aStride,
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dataProvider,
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decode,
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true);
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} else {
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mImage = CGImageCreate (aSize.width, aSize.height,
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bitsPerComponent,
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bitsPerPixel,
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aStride,
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colorSpace,
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bitinfo,
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dataProvider,
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NULL,
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true,
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kCGRenderingIntentDefault);
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}
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CGDataProviderRelease(dataProvider);
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CGColorSpaceRelease (colorSpace);
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return mImage;
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}
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CGContextRef CreateBitmapContextForImage(CGImageRef image)
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{
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CGColorSpaceRef colorSpace;
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size_t width = CGImageGetWidth(image);
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size_t height = CGImageGetHeight(image);
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int bitmapBytesPerRow = (width * 4);
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int bitmapByteCount = (bitmapBytesPerRow * height);
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void *data = calloc(bitmapByteCount, 1);
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//XXX: which color space should we be using here?
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colorSpace = CGColorSpaceCreateDeviceRGB();
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assert(colorSpace);
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// we'd like to pass NULL as the first parameter
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// to let Quartz manage this memory for us. However,
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// on 10.5 and older CGBitmapContextGetData will return
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// NULL instead of the associated buffer so we need
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// to manage it ourselves.
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CGContextRef cg = CGBitmapContextCreate(data,
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width,
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height,
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8,
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bitmapBytesPerRow,
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colorSpace,
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kCGBitmapByteOrder32Host | kCGImageAlphaPremultipliedFirst);
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assert(cg);
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CGColorSpaceRelease(colorSpace);
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return cg;
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}
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DataSourceSurfaceCG::DataSourceSurfaceCG(CGImageRef aImage)
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{
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mImage = aImage;
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mCg = CreateBitmapContextForImage(aImage);
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if (mCg == NULL) {
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// error creating context
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return;
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}
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// Get image width, height. We'll use the entire image.
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CGFloat w = CGImageGetWidth(aImage);
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CGFloat h = CGImageGetHeight(aImage);
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CGRect rect = {{0,0},{w,h}};
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// Draw the image to the bitmap context. Once we draw, the memory
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// allocated for the context for rendering will then contain the
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// raw image data in the specified color space.
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CGContextDrawImage(mCg, rect, aImage);
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// Now we can get a pointer to the image data associated with the bitmap
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// context.
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mData = CGBitmapContextGetData(mCg);
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assert(mData);
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}
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unsigned char *
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DataSourceSurfaceCG::GetData()
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{
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// See http://developer.apple.com/library/mac/#qa/qa1509/_index.html
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// the following only works on 10.5+, the Q&A above suggests a method
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// that can be used for earlier versions
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//CFDataRef data = CGDataProviderCopyData(CGImageGetDataProvider(cgImage));
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//unsigned char *dataPtr = CFDataGetBytePtr(data);
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//CFDataRelease(data);
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// unfortunately the the method above only works for read-only access and
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// we need read-write for DataSourceSurfaces
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return (unsigned char*)mData;
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}
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SourceSurfaceCGBitmapContext::SourceSurfaceCGBitmapContext(DrawTargetCG *aDrawTarget)
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{
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mDrawTarget = aDrawTarget;
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mCg = (CGContextRef)aDrawTarget->GetNativeSurface(NATIVE_SURFACE_CGCONTEXT);
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CGContextRetain(mCg);
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mSize.width = CGBitmapContextGetWidth(mCg);
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mSize.height = CGBitmapContextGetHeight(mCg);
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mStride = CGBitmapContextGetBytesPerRow(mCg);
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mData = CGBitmapContextGetData(mCg);
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mImage = NULL;
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}
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void SourceSurfaceCGBitmapContext::EnsureImage() const
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{
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if (!mImage) {
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if (mCg) {
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mImage = CGBitmapContextCreateImage(mCg);
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} else {
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//XXX: we should avoid creating this colorspace everytime
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CGColorSpaceRef colorSpace = NULL;
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CGBitmapInfo bitinfo = 0;
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CGDataProviderRef dataProvider = NULL;
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int bitsPerComponent = 8;
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int bitsPerPixel = 32;
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colorSpace = CGColorSpaceCreateDeviceRGB();
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bitinfo = kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host;
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dataProvider = CGDataProviderCreateWithData (mData,
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mData,
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mSize.height * mStride,
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releaseCallback);
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mImage = CGImageCreate (mSize.width, mSize.height,
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bitsPerComponent,
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bitsPerPixel,
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mStride,
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colorSpace,
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bitinfo,
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dataProvider,
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NULL,
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true,
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kCGRenderingIntentDefault);
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CGDataProviderRelease(dataProvider);
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CGColorSpaceRelease (colorSpace);
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}
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}
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}
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IntSize
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SourceSurfaceCGBitmapContext::GetSize() const
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{
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return mSize;
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}
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void
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SourceSurfaceCGBitmapContext::DrawTargetWillChange()
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{
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if (mDrawTarget) {
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size_t stride = CGBitmapContextGetBytesPerRow(mCg);
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size_t height = CGBitmapContextGetHeight(mCg);
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//XXX: infalliable malloc?
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mData = malloc(stride * height);
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memcpy(mData, CGBitmapContextGetData(mCg), stride*height);
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CGContextRelease(mCg);
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mCg = NULL;
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mDrawTarget = NULL;
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}
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}
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SourceSurfaceCGBitmapContext::~SourceSurfaceCGBitmapContext()
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{
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if (!mImage && !mCg) {
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// neither mImage or mCg owns the data
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free(mData);
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}
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if (mCg)
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CGContextRelease(mCg);
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if (mImage)
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CGImageRelease(mImage);
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}
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}
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}
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