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-rw-r--r--gfx/thebes/PrintTarget.cpp159
1 files changed, 159 insertions, 0 deletions
diff --git a/gfx/thebes/PrintTarget.cpp b/gfx/thebes/PrintTarget.cpp
new file mode 100644
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+++ b/gfx/thebes/PrintTarget.cpp
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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 "PrintTarget.h"
+
+#include "cairo.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/Logging.h"
+
+namespace mozilla {
+namespace gfx {
+
+PrintTarget::PrintTarget(cairo_surface_t* aCairoSurface, const IntSize& aSize)
+ : mCairoSurface(aCairoSurface)
+ , mSize(aSize)
+ , mIsFinished(false)
+#ifdef DEBUG
+ , mHasActivePage(false)
+#endif
+
+{
+#if 0
+ // aCairoSurface is null when our PrintTargetThebes subclass's ctor calls us.
+ // Once PrintTargetThebes is removed, enable this assertion.
+ MOZ_ASSERT(aCairoSurface && !cairo_surface_status(aCairoSurface),
+ "CreateOrNull factory methods should not call us without a "
+ "valid cairo_surface_t*");
+#endif
+
+ // CreateOrNull factory methods hand over ownership of aCairoSurface,
+ // so we don't call cairo_surface_reference(aSurface) here.
+
+ // This code was copied from gfxASurface::Init:
+#ifdef MOZ_TREE_CAIRO
+ if (mCairoSurface &&
+ cairo_surface_get_content(mCairoSurface) != CAIRO_CONTENT_COLOR) {
+ cairo_surface_set_subpixel_antialiasing(mCairoSurface,
+ CAIRO_SUBPIXEL_ANTIALIASING_DISABLED);
+ }
+#endif
+}
+
+PrintTarget::~PrintTarget()
+{
+ // null surfaces are allowed here
+ cairo_surface_destroy(mCairoSurface);
+ mCairoSurface = nullptr;
+}
+
+already_AddRefed<DrawTarget>
+PrintTarget::MakeDrawTarget(const IntSize& aSize,
+ DrawEventRecorder* aRecorder)
+{
+ MOZ_ASSERT(mCairoSurface,
+ "We shouldn't have been constructed without a cairo surface");
+
+ // This should not be called outside of BeginPage()/EndPage() calls since
+ // some backends can only provide a valid DrawTarget at that time.
+ MOZ_ASSERT(mHasActivePage, "We can't guarantee a valid DrawTarget");
+
+ if (cairo_surface_status(mCairoSurface)) {
+ return nullptr;
+ }
+
+ // Note than aSize may not be the same as mSize (the size of mCairoSurface).
+ // See the comments in our header. If the sizes are different a clip will
+ // be applied to mCairoSurface.
+ RefPtr<DrawTarget> dt =
+ Factory::CreateDrawTargetForCairoSurface(mCairoSurface, aSize);
+ if (!dt || !dt->IsValid()) {
+ return nullptr;
+ }
+
+ if (aRecorder) {
+ dt = CreateRecordingDrawTarget(aRecorder, dt);
+ if (!dt || !dt->IsValid()) {
+ return nullptr;
+ }
+ }
+
+ return dt.forget();
+}
+
+already_AddRefed<DrawTarget>
+PrintTarget::GetReferenceDrawTarget(DrawEventRecorder* aRecorder)
+{
+ if (!mRefDT) {
+ IntSize size(1, 1);
+
+ cairo_surface_t* surface =
+ cairo_surface_create_similar(mCairoSurface,
+ cairo_surface_get_content(mCairoSurface),
+ size.width, size.height);
+
+ if (cairo_surface_status(surface)) {
+ return nullptr;
+ }
+
+ RefPtr<DrawTarget> dt =
+ Factory::CreateDrawTargetForCairoSurface(surface, size);
+
+ // The DT addrefs the surface, so we need drop our own reference to it:
+ cairo_surface_destroy(surface);
+
+ if (!dt || !dt->IsValid()) {
+ return nullptr;
+ }
+
+ if (aRecorder) {
+ dt = CreateRecordingDrawTarget(aRecorder, dt);
+ if (!dt || !dt->IsValid()) {
+ return nullptr;
+ }
+ }
+
+ mRefDT = dt.forget();
+ }
+ return do_AddRef(mRefDT);
+}
+
+already_AddRefed<DrawTarget>
+PrintTarget::CreateRecordingDrawTarget(DrawEventRecorder* aRecorder,
+ DrawTarget* aDrawTarget)
+{
+ MOZ_ASSERT(aRecorder);
+ MOZ_ASSERT(aDrawTarget);
+
+ RefPtr<DrawTarget> dt;
+
+ if (aRecorder) {
+ // It doesn't really matter what we pass as the DrawTarget here.
+ dt = gfx::Factory::CreateRecordingDrawTarget(aRecorder, aDrawTarget);
+ }
+
+ if (!dt || !dt->IsValid()) {
+ gfxCriticalNote
+ << "Failed to create a recording DrawTarget for PrintTarget";
+ return nullptr;
+ }
+
+ return dt.forget();
+}
+
+void
+PrintTarget::Finish()
+{
+ if (mIsFinished) {
+ return;
+ }
+ mIsFinished = true;
+
+ // null surfaces are allowed here
+ cairo_surface_finish(mCairoSurface);
+}
+
+} // namespace gfx
+} // namespace mozilla