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/* -*- 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 "gfxPlatform.h"
#include "mozilla/gfx/Helpers.h"
using namespace mozilla::gfx;
using namespace mozilla;
gfxQuartzNativeDrawing::gfxQuartzNativeDrawing(DrawTarget& aDrawTarget,
const Rect& nativeRect)
: mDrawTarget(&aDrawTarget)
, mNativeRect(nativeRect)
, mCGContext(nullptr)
{
}
CGContextRef
gfxQuartzNativeDrawing::BeginNativeDrawing()
{
NS_ASSERTION(!mCGContext, "BeginNativeDrawing called when drawing already in progress");
DrawTarget *dt = mDrawTarget;
if (dt->IsDualDrawTarget() || dt->IsTiledDrawTarget() ||
dt->GetBackendType() != BackendType::SKIA) {
// We need a DrawTarget that we can get a CGContextRef from:
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;
}
mTempDrawTarget =
Factory::CreateDrawTarget(BackendType::SKIA,
IntSize::Truncate(mNativeRect.width, mNativeRect.height),
SurfaceFormat::B8G8R8A8);
if (mTempDrawTarget) {
transform.PostTranslate(-mNativeRect.x, -mNativeRect.y);
mTempDrawTarget->SetTransform(transform);
}
dt = mTempDrawTarget;
}
if (dt) {
MOZ_ASSERT(dt->GetBackendType() == BackendType::SKIA);
mCGContext = mBorrowedContext.Init(dt);
MOZ_ASSERT(mCGContext);
}
return mCGContext;
}
void
gfxQuartzNativeDrawing::EndNativeDrawing()
{
NS_ASSERTION(mCGContext, "EndNativeDrawing called without BeginNativeDrawing");
mBorrowedContext.Finish();
if (mTempDrawTarget) {
RefPtr<SourceSurface> source = mTempDrawTarget->Snapshot();
AutoRestoreTransform autoRestore(mDrawTarget);
mDrawTarget->SetTransform(Matrix());
mDrawTarget->DrawSurface(source, mNativeRect,
Rect(0, 0, mNativeRect.width, mNativeRect.height));
}
}
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