/* -*- 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->GetBackendType() != BackendType::COREGRAPHICS || dt->IsDualDrawTarget() || dt->IsTiledDrawTarget()) { // 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::COREGRAPHICS, IntSize(mNativeRect.width, mNativeRect.height), SurfaceFormat::B8G8R8A8); if (mTempDrawTarget) { transform.PostTranslate(-mNativeRect.x, -mNativeRect.y); mTempDrawTarget->SetTransform(transform); } dt = mTempDrawTarget; } if (dt) { mCGContext = mBorrowedContext.Init(dt); MOZ_ASSERT(mCGContext); } return mCGContext; } void gfxQuartzNativeDrawing::EndNativeDrawing() { NS_ASSERTION(mCGContext, "EndNativeDrawing called without BeginNativeDrawing"); mBorrowedContext.Finish(); if (mTempDrawTarget) { RefPtr source = mTempDrawTarget->Snapshot(); AutoRestoreTransform autoRestore(mDrawTarget); mDrawTarget->SetTransform(Matrix()); mDrawTarget->DrawSurface(source, mNativeRect, Rect(0, 0, mNativeRect.width, mNativeRect.height)); } }