gecko-dev/gfx/thebes/gfxDrawable.cpp

229 lines
7.7 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "gfxDrawable.h"
#include "gfxASurface.h"
#include "gfxContext.h"
#include "gfxPlatform.h"
#include "gfxColor.h"
#include "gfx2DGlue.h"
#ifdef MOZ_X11
#include "cairo.h"
#include "gfxXlibSurface.h"
#endif
using namespace mozilla;
using namespace mozilla::gfx;
gfxSurfaceDrawable::gfxSurfaceDrawable(SourceSurface* aSurface,
const gfxIntSize aSize,
const gfxMatrix aTransform)
: gfxDrawable(aSize)
, mSourceSurface(aSurface)
, mTransform(aTransform)
{
}
bool
gfxSurfaceDrawable::DrawWithSamplingRect(gfxContext* aContext,
const gfxRect& aFillRect,
const gfxRect& aSamplingRect,
bool aRepeat,
const GraphicsFilter& aFilter,
gfxFloat aOpacity)
{
if (!mSourceSurface) {
return true;
}
// When drawing with CLAMP we can expand the sampling rect to the nearest pixel
// without changing the result.
gfxRect samplingRect = aSamplingRect;
samplingRect.RoundOut();
IntRect intRect(samplingRect.x, samplingRect.y, samplingRect.width, samplingRect.height);
IntSize size = mSourceSurface->GetSize();
if (!IntRect(0, 0, size.width, size.height).Contains(intRect)) {
return false;
}
DrawInternal(aContext, aFillRect, intRect, false, aFilter, aOpacity, gfxMatrix());
return true;
}
bool
gfxSurfaceDrawable::Draw(gfxContext* aContext,
const gfxRect& aFillRect,
bool aRepeat,
const GraphicsFilter& aFilter,
gfxFloat aOpacity,
const gfxMatrix& aTransform)
{
DrawInternal(aContext, aFillRect, IntRect(), aRepeat, aFilter, aOpacity, aTransform);
return true;
}
void
gfxSurfaceDrawable::DrawInternal(gfxContext* aContext,
const gfxRect& aFillRect,
const IntRect& aSamplingRect,
bool aRepeat,
const GraphicsFilter& aFilter,
gfxFloat aOpacity,
const gfxMatrix& aTransform)
{
ExtendMode extend = ExtendMode::CLAMP;
if (aRepeat) {
extend = ExtendMode::REPEAT;
}
Matrix patternTransform = ToMatrix(aTransform * mTransform);
patternTransform.Invert();
SurfacePattern pattern(mSourceSurface, extend,
patternTransform, ToFilter(aFilter), aSamplingRect);
Rect fillRect = ToRect(aFillRect);
DrawTarget* dt = aContext->GetDrawTarget();
if (aContext->CurrentOperator() == gfxContext::OPERATOR_SOURCE &&
aOpacity == 1.0) {
// Emulate cairo operator source which is bound by mask!
dt->ClearRect(fillRect);
dt->FillRect(fillRect, pattern);
} else {
dt->FillRect(fillRect, pattern,
DrawOptions(aOpacity,
CompositionOpForOp(aContext->CurrentOperator()),
aContext->CurrentAntialiasMode()));
}
}
gfxCallbackDrawable::gfxCallbackDrawable(gfxDrawingCallback* aCallback,
const gfxIntSize aSize)
: gfxDrawable(aSize)
, mCallback(aCallback)
{
}
already_AddRefed<gfxSurfaceDrawable>
gfxCallbackDrawable::MakeSurfaceDrawable(const GraphicsFilter aFilter)
{
SurfaceFormat format =
gfxPlatform::GetPlatform()->Optimal2DFormatForContent(gfxContentType::COLOR_ALPHA);
RefPtr<DrawTarget> dt =
gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(mSize,
format);
if (!dt)
return nullptr;
nsRefPtr<gfxContext> ctx = new gfxContext(dt);
Draw(ctx, gfxRect(0, 0, mSize.width, mSize.height), false, aFilter);
RefPtr<SourceSurface> surface = dt->Snapshot();
nsRefPtr<gfxSurfaceDrawable> drawable = new gfxSurfaceDrawable(surface, mSize);
return drawable.forget();
}
bool
gfxCallbackDrawable::Draw(gfxContext* aContext,
const gfxRect& aFillRect,
bool aRepeat,
const GraphicsFilter& aFilter,
gfxFloat aOpacity,
const gfxMatrix& aTransform)
{
if ((aRepeat || aOpacity != 1.0) && !mSurfaceDrawable) {
mSurfaceDrawable = MakeSurfaceDrawable(aFilter);
}
if (mSurfaceDrawable)
return mSurfaceDrawable->Draw(aContext, aFillRect, aRepeat, aFilter,
aOpacity, aTransform);
if (mCallback)
return (*mCallback)(aContext, aFillRect, aFilter, aTransform);
return false;
}
gfxPatternDrawable::gfxPatternDrawable(gfxPattern* aPattern,
const gfxIntSize aSize)
: gfxDrawable(aSize)
, mPattern(aPattern)
{
}
gfxPatternDrawable::~gfxPatternDrawable()
{
}
class DrawingCallbackFromDrawable : public gfxDrawingCallback {
public:
explicit DrawingCallbackFromDrawable(gfxDrawable* aDrawable)
: mDrawable(aDrawable) {
NS_ASSERTION(aDrawable, "aDrawable is null!");
}
virtual ~DrawingCallbackFromDrawable() {}
virtual bool operator()(gfxContext* aContext,
const gfxRect& aFillRect,
const GraphicsFilter& aFilter,
const gfxMatrix& aTransform = gfxMatrix())
{
return mDrawable->Draw(aContext, aFillRect, false, aFilter, 1.0,
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 GraphicsFilter& aFilter,
gfxFloat aOpacity,
const gfxMatrix& aTransform)
{
DrawTarget& aDrawTarget = *aContext->GetDrawTarget();
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,
aOpacity, aTransform);
}
gfxMatrix oldMatrix = mPattern->GetMatrix();
mPattern->SetMatrix(aTransform * oldMatrix);
DrawOptions drawOptions(aOpacity);
aDrawTarget.FillRect(ToRect(aFillRect),
*mPattern->GetPattern(&aDrawTarget), drawOptions);
mPattern->SetMatrix(oldMatrix);
return true;
}