зеркало из https://github.com/mozilla/gecko-dev.git
419 строки
13 KiB
C++
419 строки
13 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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* Robert O'Callahan <robert@ocallahan.org>
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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 "mozilla/Monitor.h"
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#include "ImageLayers.h"
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#include "BasicLayers.h"
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#include "gfxImageSurface.h"
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#ifdef XP_MACOSX
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#include "gfxQuartzImageSurface.h"
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#endif
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#include "cairo.h"
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#include "yuv_convert.h"
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#include "gfxPlatform.h"
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using mozilla::Monitor;
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namespace mozilla {
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namespace layers {
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/**
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* All our images can yield up a cairo surface and their size.
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*/
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class BasicImageImplData {
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public:
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/**
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* This must be called on the main thread.
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*/
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virtual already_AddRefed<gfxASurface> GetAsSurface() = 0;
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gfxIntSize GetSize() { return mSize; }
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protected:
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gfxIntSize mSize;
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};
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/**
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* Since BasicLayers only paint on the main thread, handling a CairoImage
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* is extremely simple. We just hang on to a reference to the surface and
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* return that surface when BasicImageLayer::Paint asks for it via
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* BasicImageContainer::GetAsSurface.
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*/
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class BasicCairoImage : public CairoImage, public BasicImageImplData {
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public:
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BasicCairoImage() : CairoImage(static_cast<BasicImageImplData*>(this)) {}
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virtual void SetData(const Data& aData)
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{
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mSurface = aData.mSurface;
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mSize = aData.mSize;
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}
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virtual already_AddRefed<gfxASurface> GetAsSurface()
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{
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NS_ASSERTION(NS_IsMainThread(), "Must be main thread");
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nsRefPtr<gfxASurface> surface = mSurface.get();
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return surface.forget();
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}
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protected:
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nsCountedRef<nsMainThreadSurfaceRef> mSurface;
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};
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/**
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* We handle YCbCr by converting to RGB when the image is initialized
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* (which should be done off the main thread). The RGB results are stored
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* in a memory buffer and converted to a cairo surface lazily.
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*/
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class BasicPlanarYCbCrImage : public PlanarYCbCrImage, public BasicImageImplData {
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typedef gfxASurface::gfxImageFormat gfxImageFormat;
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public:
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/**
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* aScaleHint is a size that the image is expected to be rendered at.
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* This is a hint for image backends to optimize scaling.
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*/
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BasicPlanarYCbCrImage(const gfxIntSize& aScaleHint) :
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PlanarYCbCrImage(static_cast<BasicImageImplData*>(this)),
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mScaleHint(aScaleHint),
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mOffscreenFormat(gfxASurface::ImageFormatUnknown)
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{}
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virtual void SetData(const Data& aData);
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virtual already_AddRefed<gfxASurface> GetAsSurface();
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void SetOffscreenFormat(gfxImageFormat aFormat) { mOffscreenFormat = aFormat; }
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gfxImageFormat GetOffscreenFormat() { return mOffscreenFormat; }
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protected:
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nsAutoArrayPtr<PRUint8> mBuffer;
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nsCountedRef<nsMainThreadSurfaceRef> mSurface;
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gfxIntSize mScaleHint;
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gfxImageFormat mOffscreenFormat;
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};
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void
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BasicPlanarYCbCrImage::SetData(const Data& aData)
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{
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// Do some sanity checks to prevent integer overflow
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if (aData.mYSize.width > 16384 || aData.mYSize.height > 16384) {
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NS_ERROR("Illegal width or height");
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return;
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}
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gfxASurface::gfxImageFormat format = GetOffscreenFormat();
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// 'prescale' is true if the scaling is to be done as part of the
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// YCbCr to RGB conversion rather than on the RGB data when rendered.
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PRBool prescale = mScaleHint.width > 0 && mScaleHint.height > 0;
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if (format == gfxASurface::ImageFormatRGB16_565) {
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#ifndef HAVE_SCALE_YCBCR_TO_RGB565
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// yuv2rgb16 with scale function not yet available
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prescale = PR_FALSE;
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#endif
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#ifndef HAVE_YCBCR_TO_RGB565
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// yuv2rgb16 function not yet available for non-arm
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format = gfxASurface::ImageFormatRGB24;
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#endif
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}
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gfxIntSize size(prescale ? mScaleHint.width : aData.mPicSize.width,
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prescale ? mScaleHint.height : aData.mPicSize.height);
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int bpp = gfxASurface::BytePerPixelFromFormat(format);
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mBuffer = new PRUint8[size.width * size.height * bpp];
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if (!mBuffer) {
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// out of memory
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return;
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}
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gfx::YUVType type = gfx::YV12;
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if (aData.mYSize.width == aData.mCbCrSize.width &&
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aData.mYSize.height == aData.mCbCrSize.height) {
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type = gfx::YV24;
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}
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else if (aData.mYSize.width / 2 == aData.mCbCrSize.width &&
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aData.mYSize.height == aData.mCbCrSize.height) {
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type = gfx::YV16;
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}
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else if (aData.mYSize.width / 2 == aData.mCbCrSize.width &&
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aData.mYSize.height / 2 == aData.mCbCrSize.height ) {
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type = gfx::YV12;
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}
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else {
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NS_ERROR("YCbCr format not supported");
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}
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// Convert from YCbCr to RGB now, scaling the image if needed.
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if (size != aData.mPicSize) {
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if (format == gfxASurface::ImageFormatRGB24) {
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gfx::ScaleYCbCrToRGB32(aData.mYChannel,
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aData.mCbChannel,
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aData.mCrChannel,
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mBuffer,
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aData.mPicSize.width,
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aData.mPicSize.height,
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size.width,
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size.height,
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aData.mYStride,
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aData.mCbCrStride,
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size.width*bpp,
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type,
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gfx::ROTATE_0,
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gfx::FILTER_BILINEAR);
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} else {
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NS_ERROR("Fail, ScaleYCbCrToRGB format not supported\n");
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}
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} else { // no prescale
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if (format == gfxASurface::ImageFormatRGB16_565) {
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gfx::ConvertYCbCrToRGB565(aData.mYChannel,
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aData.mCbChannel,
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aData.mCrChannel,
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mBuffer,
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aData.mPicX,
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aData.mPicY,
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aData.mPicSize.width,
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aData.mPicSize.height,
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aData.mYStride,
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aData.mCbCrStride,
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aData.mPicSize.width*bpp,
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type);
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} else { // format != gfxASurface::ImageFormatRGB16_565
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gfx::ConvertYCbCrToRGB32(aData.mYChannel,
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aData.mCbChannel,
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aData.mCrChannel,
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mBuffer,
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aData.mPicX,
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aData.mPicY,
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aData.mPicSize.width,
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aData.mPicSize.height,
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aData.mYStride,
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aData.mCbCrStride,
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aData.mPicSize.width*bpp,
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type);
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}
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}
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mSize = size;
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}
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static cairo_user_data_key_t imageSurfaceDataKey;
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static void
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DestroyBuffer(void* aBuffer)
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{
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delete[] static_cast<PRUint8*>(aBuffer);
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}
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already_AddRefed<gfxASurface>
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BasicPlanarYCbCrImage::GetAsSurface()
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{
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NS_ASSERTION(NS_IsMainThread(), "Must be main thread");
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if (mSurface) {
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nsRefPtr<gfxASurface> result = mSurface.get();
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return result.forget();
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}
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if (!mBuffer) {
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return nsnull;
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}
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gfxASurface::gfxImageFormat format = GetOffscreenFormat();
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nsRefPtr<gfxImageSurface> imgSurface =
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new gfxImageSurface(mBuffer, mSize,
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mSize.width * gfxASurface::BytePerPixelFromFormat(format),
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format);
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if (!imgSurface) {
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return nsnull;
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}
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// Pass ownership of the buffer to the surface
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imgSurface->SetData(&imageSurfaceDataKey, mBuffer.forget(), DestroyBuffer);
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nsRefPtr<gfxASurface> result = imgSurface.get();
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#if defined(XP_MACOSX)
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nsRefPtr<gfxQuartzImageSurface> quartzSurface =
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new gfxQuartzImageSurface(imgSurface);
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if (quartzSurface) {
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result = quartzSurface.forget();
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}
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#endif
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mSurface = result.get();
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return result.forget();
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}
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/**
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* Our image container is very simple. It's really just a factory
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* for the image objects. We use a Monitor to synchronize access to
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* mImage.
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*/
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class BasicImageContainer : public ImageContainer {
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public:
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typedef gfxASurface::gfxImageFormat gfxImageFormat;
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BasicImageContainer(BasicLayerManager* aManager) :
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ImageContainer(aManager), mMonitor("BasicImageContainer"),
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mScaleHint(-1, -1),
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mOffscreenFormat(gfxASurface::ImageFormatUnknown)
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{}
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virtual already_AddRefed<Image> CreateImage(const Image::Format* aFormats,
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PRUint32 aNumFormats);
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virtual void SetCurrentImage(Image* aImage);
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virtual already_AddRefed<Image> GetCurrentImage();
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virtual already_AddRefed<gfxASurface> GetCurrentAsSurface(gfxIntSize* aSize);
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virtual gfxIntSize GetCurrentSize();
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virtual PRBool SetLayerManager(LayerManager *aManager);
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virtual void SetScaleHint(const gfxIntSize& aScaleHint);
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void SetOffscreenFormat(gfxImageFormat aFormat) { mOffscreenFormat = aFormat; }
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protected:
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Monitor mMonitor;
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nsRefPtr<Image> mImage;
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gfxIntSize mScaleHint;
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gfxImageFormat mOffscreenFormat;
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};
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/**
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* Returns true if aFormat is in the given format array.
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*/
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static PRBool
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FormatInList(const Image::Format* aFormats, PRUint32 aNumFormats,
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Image::Format aFormat)
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{
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for (PRUint32 i = 0; i < aNumFormats; ++i) {
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if (aFormats[i] == aFormat) {
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return PR_TRUE;
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}
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}
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return PR_FALSE;
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}
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already_AddRefed<Image>
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BasicImageContainer::CreateImage(const Image::Format* aFormats,
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PRUint32 aNumFormats)
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{
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nsRefPtr<Image> image;
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// Prefer cairo surfaces because they're native for us
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if (FormatInList(aFormats, aNumFormats, Image::CAIRO_SURFACE)) {
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image = new BasicCairoImage();
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} else if (FormatInList(aFormats, aNumFormats, Image::PLANAR_YCBCR)) {
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MonitorAutoEnter mon(mMonitor);
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image = new BasicPlanarYCbCrImage(mScaleHint);
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static_cast<BasicPlanarYCbCrImage*>(image.get())->SetOffscreenFormat(mOffscreenFormat);
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}
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return image.forget();
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}
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void
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BasicImageContainer::SetCurrentImage(Image* aImage)
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{
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MonitorAutoEnter mon(mMonitor);
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mImage = aImage;
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}
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already_AddRefed<Image>
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BasicImageContainer::GetCurrentImage()
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{
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MonitorAutoEnter mon(mMonitor);
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nsRefPtr<Image> image = mImage;
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return image.forget();
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}
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static BasicImageImplData*
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ToImageData(Image* aImage)
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{
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return static_cast<BasicImageImplData*>(aImage->GetImplData());
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}
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already_AddRefed<gfxASurface>
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BasicImageContainer::GetCurrentAsSurface(gfxIntSize* aSizeResult)
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{
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NS_PRECONDITION(NS_IsMainThread(), "Must be called on main thread");
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MonitorAutoEnter mon(mMonitor);
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if (!mImage) {
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return nsnull;
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}
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*aSizeResult = ToImageData(mImage)->GetSize();
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return ToImageData(mImage)->GetAsSurface();
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}
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gfxIntSize
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BasicImageContainer::GetCurrentSize()
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{
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MonitorAutoEnter mon(mMonitor);
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return !mImage ? gfxIntSize(0,0) : ToImageData(mImage)->GetSize();
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}
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void BasicImageContainer::SetScaleHint(const gfxIntSize& aScaleHint)
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{
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MonitorAutoEnter mon(mMonitor);
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mScaleHint = aScaleHint;
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}
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PRBool
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BasicImageContainer::SetLayerManager(LayerManager *aManager)
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{
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if (aManager &&
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aManager->GetBackendType() != LayerManager::LAYERS_BASIC)
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{
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return PR_FALSE;
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}
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// for basic layers, we can just swap; no magic needed.
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mManager = aManager;
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return PR_TRUE;
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}
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already_AddRefed<ImageContainer>
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BasicLayerManager::CreateImageContainer()
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{
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nsRefPtr<ImageContainer> container = new BasicImageContainer(this);
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static_cast<BasicImageContainer*>(container.get())->
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SetOffscreenFormat(gfxPlatform::GetPlatform()->GetOffscreenFormat());
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return container.forget();
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}
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}
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}
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