зеркало из https://github.com/mozilla/gecko-dev.git
296 строки
11 KiB
C++
296 строки
11 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is Markus Stange.
|
|
* Portions created by the Initial Developer are Copyright (C) 2010
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#include "gfxDrawable.h"
|
|
#include "gfxASurface.h"
|
|
#include "gfxContext.h"
|
|
#include "gfxPlatform.h"
|
|
#include "mozilla/arm.h"
|
|
#ifdef MOZ_X11
|
|
#include "cairo.h"
|
|
#include "gfxXlibSurface.h"
|
|
#endif
|
|
|
|
gfxSurfaceDrawable::gfxSurfaceDrawable(gfxASurface* aSurface,
|
|
const gfxIntSize aSize,
|
|
const gfxMatrix aTransform)
|
|
: gfxDrawable(aSize)
|
|
, mSurface(aSurface)
|
|
, mTransform(aTransform)
|
|
{
|
|
}
|
|
|
|
static gfxMatrix
|
|
DeviceToImageTransform(gfxContext* aContext,
|
|
const gfxMatrix& aUserSpaceToImageSpace)
|
|
{
|
|
gfxFloat deviceX, deviceY;
|
|
nsRefPtr<gfxASurface> currentTarget =
|
|
aContext->CurrentSurface(&deviceX, &deviceY);
|
|
gfxMatrix currentMatrix = aContext->CurrentMatrix();
|
|
gfxMatrix deviceToUser = gfxMatrix(currentMatrix).Invert();
|
|
deviceToUser.Translate(-gfxPoint(-deviceX, -deviceY));
|
|
return gfxMatrix(deviceToUser).Multiply(aUserSpaceToImageSpace);
|
|
}
|
|
|
|
static void
|
|
PreparePatternForUntiledDrawing(gfxPattern* aPattern,
|
|
const gfxMatrix& aDeviceToImage,
|
|
gfxASurface *currentTarget,
|
|
const gfxPattern::GraphicsFilter aDefaultFilter)
|
|
{
|
|
// In theory we can handle this using cairo's EXTEND_PAD,
|
|
// but implementation limitations mean we have to consult
|
|
// the surface type.
|
|
switch (currentTarget->GetType()) {
|
|
|
|
// The printing surfaces don't natively support or need
|
|
// EXTEND_PAD for padding the edges. Using EXTEND_PAD this way
|
|
// is suboptimal as it will result in the printing surface
|
|
// creating a new image for each fill operation. The pattern
|
|
// will be painted to the image to pad out the pattern, then
|
|
// the new image will be used as the source. This increases
|
|
// printing time and memory use, and prevents the use of mime
|
|
// data from cairo_surface_set_mime_data(). Bug 691061.
|
|
case gfxASurface::SurfaceTypePDF:
|
|
case gfxASurface::SurfaceTypePS:
|
|
case gfxASurface::SurfaceTypeWin32Printing:
|
|
aPattern->SetExtend(gfxPattern::EXTEND_NONE);
|
|
aPattern->SetFilter(aDefaultFilter);
|
|
break;
|
|
|
|
#ifdef MOZ_X11
|
|
case gfxASurface::SurfaceTypeXlib:
|
|
{
|
|
// See bugs 324698, 422179, and 468496. This is a workaround for
|
|
// XRender's RepeatPad not being implemented correctly on old X
|
|
// servers.
|
|
//
|
|
// In this situation, cairo avoids XRender and instead reads back
|
|
// to perform EXTEND_PAD with pixman. This is too slow so we
|
|
// avoid EXTEND_PAD and set the filter to CAIRO_FILTER_FAST ---
|
|
// otherwise, pixman's sampling will sample transparency for the
|
|
// outside edges and we'll get blurry edges.
|
|
//
|
|
// But don't do this for simple downscales because it's horrible.
|
|
// Downscaling means that device-space coordinates are
|
|
// scaled *up* to find the image pixel coordinates.
|
|
//
|
|
// Cairo, and hence Gecko, can use RepeatPad on Xorg 1.7. We
|
|
// enable EXTEND_PAD provided that we're running on a recent
|
|
// enough X server.
|
|
|
|
gfxXlibSurface *xlibSurface =
|
|
static_cast<gfxXlibSurface *>(currentTarget);
|
|
Display *dpy = xlibSurface->XDisplay();
|
|
// This is the exact condition for cairo to avoid XRender for
|
|
// EXTEND_PAD
|
|
if (VendorRelease(dpy) >= 60700000 ||
|
|
VendorRelease(dpy) < 10699000) {
|
|
|
|
bool isDownscale =
|
|
aDeviceToImage.xx >= 1.0 && aDeviceToImage.yy >= 1.0 &&
|
|
aDeviceToImage.xy == 0.0 && aDeviceToImage.yx == 0.0;
|
|
|
|
gfxPattern::GraphicsFilter filter =
|
|
isDownscale ? aDefaultFilter : gfxPattern::FILTER_FAST;
|
|
aPattern->SetFilter(filter);
|
|
|
|
// Use the default EXTEND_NONE
|
|
break;
|
|
}
|
|
// else fall through to EXTEND_PAD and the default filter.
|
|
}
|
|
#endif
|
|
|
|
default:
|
|
// turn on EXTEND_PAD.
|
|
// This is what we really want for all surface types, if the
|
|
// implementation was universally good.
|
|
aPattern->SetExtend(gfxPattern::EXTEND_PAD);
|
|
aPattern->SetFilter(aDefaultFilter);
|
|
break;
|
|
}
|
|
}
|
|
|
|
bool
|
|
gfxSurfaceDrawable::Draw(gfxContext* aContext,
|
|
const gfxRect& aFillRect,
|
|
bool aRepeat,
|
|
const gfxPattern::GraphicsFilter& aFilter,
|
|
const gfxMatrix& aTransform)
|
|
{
|
|
nsRefPtr<gfxPattern> pattern = new gfxPattern(mSurface);
|
|
if (aRepeat) {
|
|
pattern->SetExtend(gfxPattern::EXTEND_REPEAT);
|
|
pattern->SetFilter(aFilter);
|
|
} else {
|
|
gfxPattern::GraphicsFilter filter = aFilter;
|
|
if (aContext->CurrentMatrix().HasOnlyIntegerTranslation() &&
|
|
aTransform.HasOnlyIntegerTranslation())
|
|
{
|
|
// If we only have integer translation, no special filtering needs to
|
|
// happen and we explicitly use FILTER_FAST. This is fast for some
|
|
// backends.
|
|
filter = gfxPattern::FILTER_FAST;
|
|
}
|
|
nsRefPtr<gfxASurface> currentTarget = aContext->CurrentSurface();
|
|
gfxMatrix deviceSpaceToImageSpace =
|
|
DeviceToImageTransform(aContext, aTransform);
|
|
PreparePatternForUntiledDrawing(pattern, deviceSpaceToImageSpace,
|
|
currentTarget, filter);
|
|
}
|
|
pattern->SetMatrix(gfxMatrix(aTransform).Multiply(mTransform));
|
|
aContext->NewPath();
|
|
aContext->SetPattern(pattern);
|
|
aContext->Rectangle(aFillRect);
|
|
aContext->Fill();
|
|
return true;
|
|
}
|
|
|
|
gfxCallbackDrawable::gfxCallbackDrawable(gfxDrawingCallback* aCallback,
|
|
const gfxIntSize aSize)
|
|
: gfxDrawable(aSize)
|
|
, mCallback(aCallback)
|
|
{
|
|
}
|
|
|
|
already_AddRefed<gfxSurfaceDrawable>
|
|
gfxCallbackDrawable::MakeSurfaceDrawable(const gfxPattern::GraphicsFilter aFilter)
|
|
{
|
|
nsRefPtr<gfxASurface> surface =
|
|
gfxPlatform::GetPlatform()->CreateOffscreenSurface(mSize, gfxASurface::CONTENT_COLOR_ALPHA);
|
|
if (!surface || surface->CairoStatus() != 0)
|
|
return nsnull;
|
|
|
|
nsRefPtr<gfxContext> ctx = new gfxContext(surface);
|
|
Draw(ctx, gfxRect(0, 0, mSize.width, mSize.height), false, aFilter);
|
|
nsRefPtr<gfxSurfaceDrawable> drawable = new gfxSurfaceDrawable(surface, mSize);
|
|
return drawable.forget();
|
|
}
|
|
|
|
bool
|
|
gfxCallbackDrawable::Draw(gfxContext* aContext,
|
|
const gfxRect& aFillRect,
|
|
bool aRepeat,
|
|
const gfxPattern::GraphicsFilter& aFilter,
|
|
const gfxMatrix& aTransform)
|
|
{
|
|
if (aRepeat && !mSurfaceDrawable) {
|
|
mSurfaceDrawable = MakeSurfaceDrawable(aFilter);
|
|
}
|
|
|
|
if (mSurfaceDrawable)
|
|
return mSurfaceDrawable->Draw(aContext, aFillRect, aRepeat, aFilter,
|
|
aTransform);
|
|
|
|
if (mCallback)
|
|
return (*mCallback)(aContext, aFillRect, aFilter, aTransform);
|
|
|
|
return false;
|
|
}
|
|
|
|
gfxPatternDrawable::gfxPatternDrawable(gfxPattern* aPattern,
|
|
const gfxIntSize aSize)
|
|
: gfxDrawable(aSize)
|
|
, mPattern(aPattern)
|
|
{
|
|
}
|
|
|
|
class DrawingCallbackFromDrawable : public gfxDrawingCallback {
|
|
public:
|
|
DrawingCallbackFromDrawable(gfxDrawable* aDrawable)
|
|
: mDrawable(aDrawable) {
|
|
NS_ASSERTION(aDrawable, "aDrawable is null!");
|
|
}
|
|
|
|
virtual ~DrawingCallbackFromDrawable() {}
|
|
|
|
virtual bool operator()(gfxContext* aContext,
|
|
const gfxRect& aFillRect,
|
|
const gfxPattern::GraphicsFilter& aFilter,
|
|
const gfxMatrix& aTransform = gfxMatrix())
|
|
{
|
|
return mDrawable->Draw(aContext, aFillRect, false, aFilter,
|
|
aTransform);
|
|
}
|
|
private:
|
|
nsRefPtr<gfxDrawable> mDrawable;
|
|
};
|
|
|
|
already_AddRefed<gfxCallbackDrawable>
|
|
gfxPatternDrawable::MakeCallbackDrawable()
|
|
{
|
|
nsRefPtr<gfxDrawingCallback> callback =
|
|
new DrawingCallbackFromDrawable(this);
|
|
nsRefPtr<gfxCallbackDrawable> callbackDrawable =
|
|
new gfxCallbackDrawable(callback, mSize);
|
|
return callbackDrawable.forget();
|
|
}
|
|
|
|
bool
|
|
gfxPatternDrawable::Draw(gfxContext* aContext,
|
|
const gfxRect& aFillRect,
|
|
bool aRepeat,
|
|
const gfxPattern::GraphicsFilter& aFilter,
|
|
const gfxMatrix& aTransform)
|
|
{
|
|
if (!mPattern)
|
|
return false;
|
|
|
|
if (aRepeat) {
|
|
// We can't use mPattern directly: We want our repeated tiles to have
|
|
// the size mSize, which might not be the case in mPattern.
|
|
// So we need to draw mPattern into a surface of size mSize, create
|
|
// a pattern from the surface and draw that pattern.
|
|
// gfxCallbackDrawable and gfxSurfaceDrawable already know how to do
|
|
// those things, so we use them here. Drawing mPattern into the surface
|
|
// will happen through this Draw() method with aRepeat = false.
|
|
nsRefPtr<gfxCallbackDrawable> callbackDrawable = MakeCallbackDrawable();
|
|
return callbackDrawable->Draw(aContext, aFillRect, true, aFilter,
|
|
aTransform);
|
|
}
|
|
|
|
aContext->NewPath();
|
|
gfxMatrix oldMatrix = mPattern->GetMatrix();
|
|
mPattern->SetMatrix(gfxMatrix(aTransform).Multiply(oldMatrix));
|
|
aContext->SetPattern(mPattern);
|
|
aContext->Rectangle(aFillRect);
|
|
aContext->Fill();
|
|
mPattern->SetMatrix(oldMatrix);
|
|
return true;
|
|
}
|