зеркало из https://github.com/mozilla/pjs.git
298 строки
12 KiB
C++
298 строки
12 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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.org code.
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*
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* The Initial Developer of the Original Code is Markus Stange.
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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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 "gfxDrawable.h"
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#include "gfxASurface.h"
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#include "gfxContext.h"
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#include "gfxPlatform.h"
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#ifdef MOZ_X11
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#include "cairo.h"
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#include "gfxXlibSurface.h"
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#endif
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gfxSurfaceDrawable::gfxSurfaceDrawable(gfxASurface* aSurface,
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const gfxIntSize aSize,
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const gfxMatrix aTransform)
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: gfxDrawable(aSize)
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, mSurface(aSurface)
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, mTransform(aTransform)
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{
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}
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static gfxMatrix
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DeviceToImageTransform(gfxContext* aContext,
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const gfxMatrix& aUserSpaceToImageSpace)
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{
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gfxFloat deviceX, deviceY;
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nsRefPtr<gfxASurface> currentTarget =
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aContext->CurrentSurface(&deviceX, &deviceY);
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gfxMatrix currentMatrix = aContext->CurrentMatrix();
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gfxMatrix deviceToUser = gfxMatrix(currentMatrix).Invert();
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deviceToUser.Translate(-gfxPoint(-deviceX, -deviceY));
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return gfxMatrix(deviceToUser).Multiply(aUserSpaceToImageSpace);
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}
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static void
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PreparePatternForUntiledDrawing(gfxPattern* aPattern,
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const gfxMatrix& aDeviceToImage,
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gfxASurface::gfxSurfaceType aSurfaceType,
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nsRefPtr<gfxASurface> currentTarget,
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const gfxPattern::GraphicsFilter aDefaultFilter)
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{
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// In theory we can handle this using cairo's EXTEND_PAD,
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// but implementation limitations mean we have to consult
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// the surface type.
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switch (aSurfaceType) {
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case gfxASurface::SurfaceTypeXlib:
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case gfxASurface::SurfaceTypeXcb:
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{
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// See bug 324698. This is a workaround for EXTEND_PAD not being
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// implemented correctly on linux in the X server.
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//
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// Set the filter to CAIRO_FILTER_FAST --- otherwise,
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// pixman's sampling will sample transparency for the outside edges
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// and we'll get blurry edges. CAIRO_EXTEND_PAD would also work
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// here, if available
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//
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// But don't do this for simple downscales because it's horrible.
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// Downscaling means that device-space coordinates are
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// scaled *up* to find the image pixel coordinates.
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//
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// Update 8/11/09: The underlying X server/driver bugs are now
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// fixed, and cairo uses the fast XRender code-path as of 1.9.2
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// (commit a1d0a06b6275cac3974be84919993e187394fe43) --
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// but only if running on a 1.7 X server.
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// So we enable EXTEND_PAD provided that we're running a recent
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// enough cairo version (obviously, this is only relevant if
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// --enable-system-cairo is used) AND running on a recent
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// enough X server. This should finally bring linux up to par
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// with other systems.
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PRBool isDownscale =
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aDeviceToImage.xx >= 1.0 && aDeviceToImage.yy >= 1.0 &&
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aDeviceToImage.xy == 0.0 && aDeviceToImage.yx == 0.0;
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if (!isDownscale) {
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#ifdef MOZ_X11
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PRBool fastExtendPad = PR_FALSE;
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if (currentTarget->GetType() == gfxASurface::SurfaceTypeXlib &&
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cairo_version() >= CAIRO_VERSION_ENCODE(1,9,2)) {
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gfxXlibSurface *xlibSurface =
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static_cast<gfxXlibSurface *>(currentTarget.get());
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Display *dpy = xlibSurface->XDisplay();
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// This is the exact condition for cairo to use XRender for
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// EXTEND_PAD
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if (VendorRelease (dpy) < 60700000 &&
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VendorRelease (dpy) >= 10699000)
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fastExtendPad = PR_TRUE;
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}
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if (fastExtendPad) {
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aPattern->SetExtend(gfxPattern::EXTEND_PAD);
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aPattern->SetFilter(aDefaultFilter);
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} else
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#endif
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aPattern->SetFilter(gfxPattern::FILTER_FAST);
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}
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break;
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}
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case gfxASurface::SurfaceTypeQuartz:
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case gfxASurface::SurfaceTypeQuartzImage:
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// Don't set EXTEND_PAD, Mac seems to be OK. Really?
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aPattern->SetFilter(aDefaultFilter);
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break;
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default:
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// turn on EXTEND_PAD.
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// This is what we really want for all surface types, if the
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// implementation was universally good.
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aPattern->SetExtend(gfxPattern::EXTEND_PAD);
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aPattern->SetFilter(aDefaultFilter);
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break;
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}
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}
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PRBool
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gfxSurfaceDrawable::Draw(gfxContext* aContext,
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const gfxRect& aFillRect,
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PRBool aRepeat,
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const gfxPattern::GraphicsFilter& aFilter,
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const gfxMatrix& aTransform)
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{
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nsRefPtr<gfxPattern> pattern = new gfxPattern(mSurface);
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if (aRepeat) {
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pattern->SetExtend(gfxPattern::EXTEND_REPEAT);
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pattern->SetFilter(aFilter);
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} else {
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gfxPattern::GraphicsFilter filter = aFilter;
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if (aContext->CurrentMatrix().HasOnlyIntegerTranslation() &&
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aTransform.HasOnlyIntegerTranslation())
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{
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// If we only have integer translation, no special filtering needs to
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// happen and we explicitly use FILTER_FAST. This is fast for some
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// backends.
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filter = gfxPattern::FILTER_FAST;
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}
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nsRefPtr<gfxASurface> currentTarget = aContext->CurrentSurface();
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gfxASurface::gfxSurfaceType surfaceType = currentTarget->GetType();
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gfxMatrix deviceSpaceToImageSpace =
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DeviceToImageTransform(aContext, aTransform);
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PreparePatternForUntiledDrawing(pattern, deviceSpaceToImageSpace,
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surfaceType, currentTarget, filter);
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}
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#ifdef MOZ_GFX_OPTIMIZE_MOBILE
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pattern->SetFilter(gfxPattern::FILTER_FAST);
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#endif
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pattern->SetMatrix(gfxMatrix(aTransform).Multiply(mTransform));
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aContext->NewPath();
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aContext->SetPattern(pattern);
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aContext->Rectangle(aFillRect);
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aContext->Fill();
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return PR_TRUE;
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}
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gfxCallbackDrawable::gfxCallbackDrawable(gfxDrawingCallback* aCallback,
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const gfxIntSize aSize)
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: gfxDrawable(aSize)
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, mCallback(aCallback)
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{
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}
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already_AddRefed<gfxSurfaceDrawable>
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gfxCallbackDrawable::MakeSurfaceDrawable(const gfxPattern::GraphicsFilter aFilter)
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{
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nsRefPtr<gfxASurface> surface =
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gfxPlatform::GetPlatform()->CreateOffscreenSurface(mSize, gfxASurface::CONTENT_COLOR_ALPHA);
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if (!surface || surface->CairoStatus() != 0)
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return nsnull;
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nsRefPtr<gfxContext> ctx = new gfxContext(surface);
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Draw(ctx, gfxRect(0, 0, mSize.width, mSize.height), PR_FALSE, aFilter);
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nsRefPtr<gfxSurfaceDrawable> drawable = new gfxSurfaceDrawable(surface, mSize);
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return drawable.forget();
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}
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PRBool
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gfxCallbackDrawable::Draw(gfxContext* aContext,
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const gfxRect& aFillRect,
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PRBool aRepeat,
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const gfxPattern::GraphicsFilter& aFilter,
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const gfxMatrix& aTransform)
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{
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if (aRepeat && !mSurfaceDrawable) {
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mSurfaceDrawable = MakeSurfaceDrawable(aFilter);
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}
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if (mSurfaceDrawable)
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return mSurfaceDrawable->Draw(aContext, aFillRect, aRepeat, aFilter,
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aTransform);
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if (mCallback)
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return (*mCallback)(aContext, aFillRect, aFilter, aTransform);
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return PR_FALSE;
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}
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gfxPatternDrawable::gfxPatternDrawable(gfxPattern* aPattern,
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const gfxIntSize aSize)
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: gfxDrawable(aSize)
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, mPattern(aPattern)
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{
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}
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class DrawingCallbackFromDrawable : public gfxDrawingCallback {
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public:
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DrawingCallbackFromDrawable(gfxDrawable* aDrawable)
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: mDrawable(aDrawable) {
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NS_ASSERTION(aDrawable, "aDrawable is null!");
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}
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virtual ~DrawingCallbackFromDrawable() {}
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virtual PRBool operator()(gfxContext* aContext,
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const gfxRect& aFillRect,
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const gfxPattern::GraphicsFilter& aFilter,
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const gfxMatrix& aTransform = gfxMatrix())
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{
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return mDrawable->Draw(aContext, aFillRect, PR_FALSE, aFilter,
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aTransform);
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}
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private:
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nsRefPtr<gfxDrawable> mDrawable;
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};
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already_AddRefed<gfxCallbackDrawable>
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gfxPatternDrawable::MakeCallbackDrawable()
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{
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nsRefPtr<gfxDrawingCallback> callback =
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new DrawingCallbackFromDrawable(this);
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nsRefPtr<gfxCallbackDrawable> callbackDrawable =
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new gfxCallbackDrawable(callback, mSize);
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return callbackDrawable.forget();
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}
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PRBool
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gfxPatternDrawable::Draw(gfxContext* aContext,
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const gfxRect& aFillRect,
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PRBool aRepeat,
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const gfxPattern::GraphicsFilter& aFilter,
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const gfxMatrix& aTransform)
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{
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if (!mPattern)
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return PR_FALSE;
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if (aRepeat) {
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// We can't use mPattern directly: We want our repeated tiles to have
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// the size mSize, which might not be the case in mPattern.
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// So we need to draw mPattern into a surface of size mSize, create
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// a pattern from the surface and draw that pattern.
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// gfxCallbackDrawable and gfxSurfaceDrawable already know how to do
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// those things, so we use them here. Drawing mPattern into the surface
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// will happen through this Draw() method with aRepeat = PR_FALSE.
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nsRefPtr<gfxCallbackDrawable> callbackDrawable = MakeCallbackDrawable();
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return callbackDrawable->Draw(aContext, aFillRect, PR_TRUE, aFilter,
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aTransform);
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}
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aContext->NewPath();
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gfxMatrix oldMatrix = mPattern->GetMatrix();
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mPattern->SetMatrix(gfxMatrix(aTransform).Multiply(oldMatrix));
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aContext->SetPattern(mPattern);
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aContext->Rectangle(aFillRect);
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aContext->Fill();
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mPattern->SetMatrix(oldMatrix);
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return PR_TRUE;
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}
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