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90 lines
2.9 KiB
C++
90 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "gfxQuartzNativeDrawing.h"
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#include "gfxQuartzSurface.h"
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#include "gfxPlatform.h"
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#include "cairo-quartz.h"
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using namespace mozilla::gfx;
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using namespace mozilla;
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gfxQuartzNativeDrawing::gfxQuartzNativeDrawing(gfxContext* ctx,
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const gfxRect& nativeRect,
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gfxFloat aBackingScale)
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: mContext(ctx)
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, mNativeRect(nativeRect)
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, mBackingScale(aBackingScale)
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, mCGContext(nullptr)
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{
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mNativeRect.RoundOut();
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}
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CGContextRef
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gfxQuartzNativeDrawing::BeginNativeDrawing()
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{
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NS_ASSERTION(!mCGContext, "BeginNativeDrawing called when drawing already in progress");
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if (mContext->IsCairo()) {
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// We're past that now. Any callers that still supply a Cairo context
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// don't deserve native theming.
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NS_WARNING("gfxQuartzNativeDrawing being used with a gfxContext that is not backed by a DrawTarget");
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return nullptr;
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}
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DrawTarget *dt = mContext->GetDrawTarget();
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if (dt->GetBackendType() != BackendType::COREGRAPHICS || dt->IsDualDrawTarget()) {
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IntSize backingSize(NSToIntFloor(mNativeRect.width * mBackingScale),
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NSToIntFloor(mNativeRect.height * mBackingScale));
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if (backingSize.IsEmpty()) {
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return nullptr;
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}
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mDrawTarget = Factory::CreateDrawTarget(BackendType::COREGRAPHICS, backingSize, SurfaceFormat::B8G8R8A8);
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Matrix transform;
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transform.Scale(mBackingScale, mBackingScale);
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transform.Translate(-mNativeRect.x, -mNativeRect.y);
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mDrawTarget->SetTransform(transform);
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dt = mDrawTarget;
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}
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mCGContext = mBorrowedContext.Init(dt);
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MOZ_ASSERT(mCGContext);
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return mCGContext;
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}
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void
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gfxQuartzNativeDrawing::EndNativeDrawing()
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{
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NS_ASSERTION(mCGContext, "EndNativeDrawing called without BeginNativeDrawing");
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MOZ_ASSERT(!mContext->IsCairo(), "BeginNativeDrawing succeeded with cairo context?");
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mBorrowedContext.Finish();
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if (mDrawTarget) {
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DrawTarget *dest = mContext->GetDrawTarget();
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RefPtr<SourceSurface> source = mDrawTarget->Snapshot();
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IntSize backingSize(NSToIntFloor(mNativeRect.width * mBackingScale),
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NSToIntFloor(mNativeRect.height * mBackingScale));
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Matrix oldTransform = dest->GetTransform();
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Matrix newTransform = oldTransform;
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newTransform.Translate(mNativeRect.x, mNativeRect.y);
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newTransform.Scale(1.0f / mBackingScale, 1.0f / mBackingScale);
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dest->SetTransform(newTransform);
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dest->DrawSurface(source,
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gfx::Rect(0, 0, backingSize.width, backingSize.height),
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gfx::Rect(0, 0, backingSize.width, backingSize.height));
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dest->SetTransform(oldTransform);
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}
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}
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