gecko/gfx/thebes/gfxQuartzNativeDrawing.cpp

80 lines
2.3 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 "gfxQuartzNativeDrawing.h"
#include "gfxQuartzSurface.h"
#include "gfxPlatform.h"
#include "cairo-quartz.h"
#include "gfx2DGlue.h"
using namespace mozilla::gfx;
using namespace mozilla;
gfxQuartzNativeDrawing::gfxQuartzNativeDrawing(gfxContext* ctx,
const gfxRect& nativeRect)
: mContext(ctx)
, mNativeRect(ToRect(nativeRect))
, mCGContext(nullptr)
{
}
CGContextRef
gfxQuartzNativeDrawing::BeginNativeDrawing()
{
NS_ASSERTION(!mCGContext, "BeginNativeDrawing called when drawing already in progress");
DrawTarget *dt = mContext->GetDrawTarget();
if (dt->GetBackendType() != BackendType::COREGRAPHICS ||
dt->IsDualDrawTarget() ||
dt->IsTiledDrawTarget()) {
Matrix transform = dt->GetTransform();
mNativeRect = transform.TransformBounds(mNativeRect);
mNativeRect.RoundOut();
// Quartz theme drawing often adjusts drawing rects, so make
// sure our surface is big enough for that.
mNativeRect.Inflate(5);
if (mNativeRect.IsEmpty()) {
return nullptr;
}
mDrawTarget = Factory::CreateDrawTarget(BackendType::COREGRAPHICS,
IntSize(mNativeRect.width, mNativeRect.height),
SurfaceFormat::B8G8R8A8);
transform.PostTranslate(-mNativeRect.x, -mNativeRect.y);
mDrawTarget->SetTransform(transform);
dt = mDrawTarget;
}
mCGContext = mBorrowedContext.Init(dt);
MOZ_ASSERT(mCGContext);
return mCGContext;
}
void
gfxQuartzNativeDrawing::EndNativeDrawing()
{
NS_ASSERTION(mCGContext, "EndNativeDrawing called without BeginNativeDrawing");
mBorrowedContext.Finish();
if (mDrawTarget) {
DrawTarget *dest = mContext->GetDrawTarget();
RefPtr<SourceSurface> source = mDrawTarget->Snapshot();
Matrix oldTransform = dest->GetTransform();
dest->SetTransform(Matrix());
dest->DrawSurface(source,
mNativeRect,
gfx::Rect(0, 0, mNativeRect.width, mNativeRect.height));
dest->SetTransform(oldTransform);
}
}