1 files changed, 216 insertions, 0 deletions
diff --git a/gfx/thebes/gfxDrawable.cpp b/gfx/thebes/gfxDrawable.cpp
new file mode 100644
index 0000000000..23baa1cc2a
--- /dev/null
+++ b/gfx/thebes/gfxDrawable.cpp
@@ -0,0 +1,216 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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 "gfxDrawable.h"
+#include "gfxASurface.h"
+#include "gfxContext.h"
+#include "gfxPlatform.h"
+#include "gfx2DGlue.h"
+#ifdef MOZ_X11
+#  include "cairo.h"
+#  include "gfxXlibSurface.h"
+#endif
+#include "mozilla/gfx/Logging.h"
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+
+gfxSurfaceDrawable::gfxSurfaceDrawable(SourceSurface* aSurface,
+                                       const IntSize aSize,
+                                       const gfxMatrix aTransform)
+    : gfxDrawable(aSize), mSourceSurface(aSurface), mTransform(aTransform) {
+  if (!mSourceSurface) {
+    gfxWarning() << "Creating gfxSurfaceDrawable with null SourceSurface";
+  }
+}
+
+bool gfxSurfaceDrawable::DrawWithSamplingRect(
+    DrawTarget* aDrawTarget, CompositionOp aOp, AntialiasMode aAntialiasMode,
+    const gfxRect& aFillRect, const gfxRect& aSamplingRect,
+    ExtendMode aExtendMode, const SamplingFilter aSamplingFilter,
+    gfxFloat aOpacity) {
+  if (!mSourceSurface) {
+    return true;
+  }
+
+  // When drawing with CLAMP we can expand the sampling rect to the nearest
+  // pixel without changing the result.
+  IntRect intRect =
+      IntRect::RoundOut(aSamplingRect.X(), aSamplingRect.Y(),
+                        aSamplingRect.Width(), aSamplingRect.Height());
+
+  IntSize size = mSourceSurface->GetSize();
+  if (!IntRect(IntPoint(), size).Contains(intRect)) {
+    return false;
+  }
+
+  DrawInternal(aDrawTarget, aOp, aAntialiasMode, aFillRect, intRect,
+               ExtendMode::CLAMP, aSamplingFilter, aOpacity, gfxMatrix());
+  return true;
+}
+
+bool gfxSurfaceDrawable::Draw(gfxContext* aContext, const gfxRect& aFillRect,
+                              ExtendMode aExtendMode,
+                              const SamplingFilter aSamplingFilter,
+                              gfxFloat aOpacity, const gfxMatrix& aTransform)
+
+{
+  if (!mSourceSurface) {
+    return true;
+  }
+
+  DrawInternal(aContext->GetDrawTarget(), aContext->CurrentOp(),
+               aContext->CurrentAntialiasMode(), aFillRect, IntRect(),
+               aExtendMode, aSamplingFilter, aOpacity, aTransform);
+  return true;
+}
+
+void gfxSurfaceDrawable::DrawInternal(
+    DrawTarget* aDrawTarget, CompositionOp aOp, AntialiasMode aAntialiasMode,
+    const gfxRect& aFillRect, const IntRect& aSamplingRect,
+    ExtendMode aExtendMode, const SamplingFilter aSamplingFilter,
+    gfxFloat aOpacity, const gfxMatrix& aTransform) {
+  Matrix patternTransform = ToMatrix(aTransform * mTransform);
+  patternTransform.Invert();
+
+  SurfacePattern pattern(mSourceSurface, aExtendMode, patternTransform,
+                         aSamplingFilter, aSamplingRect);
+
+  Rect fillRect = ToRect(aFillRect);
+
+  if (aOp == CompositionOp::OP_SOURCE && aOpacity == 1.0) {
+    // Emulate cairo operator source which is bound by mask!
+    aDrawTarget->ClearRect(fillRect);
+    aDrawTarget->FillRect(fillRect, pattern);
+  } else {
+    aDrawTarget->FillRect(fillRect, pattern,
+                          DrawOptions(aOpacity, aOp, aAntialiasMode));
+  }
+}
+
+gfxCallbackDrawable::gfxCallbackDrawable(gfxDrawingCallback* aCallback,
+                                         const IntSize aSize)
+    : gfxDrawable(aSize), mCallback(aCallback) {}
+
+already_AddRefed<gfxSurfaceDrawable> gfxCallbackDrawable::MakeSurfaceDrawable(
+    gfxContext* aContext, const SamplingFilter aSamplingFilter) {
+  SurfaceFormat format = gfxPlatform::GetPlatform()->Optimal2DFormatForContent(
+      gfxContentType::COLOR_ALPHA);
+  if (!aContext->GetDrawTarget()->CanCreateSimilarDrawTarget(mSize, format)) {
+    return nullptr;
+  }
+  RefPtr<DrawTarget> dt =
+      aContext->GetDrawTarget()->CreateSimilarDrawTarget(mSize, format);
+
+  if (!dt || !dt->IsValid()) return nullptr;
+
+  RefPtr<gfxContext> ctx = gfxContext::CreateOrNull(dt);
+  MOZ_ASSERT(ctx);  // already checked for target above
+  Draw(ctx, gfxRect(0, 0, mSize.width, mSize.height), ExtendMode::CLAMP,
+       aSamplingFilter);
+
+  RefPtr<SourceSurface> surface = dt->Snapshot();
+  if (surface) {
+    RefPtr<gfxSurfaceDrawable> drawable =
+        new gfxSurfaceDrawable(surface, mSize);
+    return drawable.forget();
+  }
+  return nullptr;
+}
+
+static bool IsRepeatingExtendMode(ExtendMode aExtendMode) {
+  switch (aExtendMode) {
+    case ExtendMode::REPEAT:
+    case ExtendMode::REPEAT_X:
+    case ExtendMode::REPEAT_Y:
+      return true;
+    default:
+      return false;
+  }
+}
+
+bool gfxCallbackDrawable::Draw(gfxContext* aContext, const gfxRect& aFillRect,
+                               ExtendMode aExtendMode,
+                               const SamplingFilter aSamplingFilter,
+                               gfxFloat aOpacity, const gfxMatrix& aTransform) {
+  if ((IsRepeatingExtendMode(aExtendMode) || aOpacity != 1.0 ||
+       aContext->CurrentOp() != CompositionOp::OP_OVER) &&
+      !mSurfaceDrawable) {
+    mSurfaceDrawable = MakeSurfaceDrawable(aContext, aSamplingFilter);
+  }
+
+  if (mSurfaceDrawable)
+    return mSurfaceDrawable->Draw(aContext, aFillRect, aExtendMode,
+                                  aSamplingFilter, aOpacity, aTransform);
+
+  if (mCallback)
+    return (*mCallback)(aContext, aFillRect, aSamplingFilter, aTransform);
+
+  return false;
+}
+
+gfxPatternDrawable::gfxPatternDrawable(gfxPattern* aPattern,
+                                       const IntSize aSize)
+    : gfxDrawable(aSize), mPattern(aPattern) {}
+
+gfxPatternDrawable::~gfxPatternDrawable() = default;
+
+class DrawingCallbackFromDrawable : public gfxDrawingCallback {
+ public:
+  explicit DrawingCallbackFromDrawable(gfxDrawable* aDrawable)
+      : mDrawable(aDrawable) {
+    NS_ASSERTION(aDrawable, "aDrawable is null!");
+  }
+
+  virtual ~DrawingCallbackFromDrawable() = default;
+
+  bool operator()(gfxContext* aContext, const gfxRect& aFillRect,
+                  const SamplingFilter aSamplingFilter,
+                  const gfxMatrix& aTransform = gfxMatrix()) override {
+    return mDrawable->Draw(aContext, aFillRect, ExtendMode::CLAMP,
+                           aSamplingFilter, 1.0, aTransform);
+  }
+
+ private:
+  RefPtr<gfxDrawable> mDrawable;
+};
+
+already_AddRefed<gfxCallbackDrawable>
+gfxPatternDrawable::MakeCallbackDrawable() {
+  RefPtr<gfxDrawingCallback> callback = new DrawingCallbackFromDrawable(this);
+  RefPtr<gfxCallbackDrawable> callbackDrawable =
+      new gfxCallbackDrawable(callback, mSize);
+  return callbackDrawable.forget();
+}
+
+bool gfxPatternDrawable::Draw(gfxContext* aContext, const gfxRect& aFillRect,
+                              ExtendMode aExtendMode,
+                              const SamplingFilter aSamplingFilter,
+                              gfxFloat aOpacity, const gfxMatrix& aTransform) {
+  DrawTarget& aDrawTarget = *aContext->GetDrawTarget();
+
+  if (!mPattern) return false;
+
+  if (IsRepeatingExtendMode(aExtendMode)) {
+    // We can't use mPattern directly: We want our repeated tiles to have
+    // the size mSize, which might not be the case in mPattern.
+    // So we need to draw mPattern into a surface of size mSize, create
+    // a pattern from the surface and draw that pattern.
+    // gfxCallbackDrawable and gfxSurfaceDrawable already know how to do
+    // those things, so we use them here. Drawing mPattern into the surface
+    // will happen through this Draw() method with aRepeat = false.
+    RefPtr<gfxCallbackDrawable> callbackDrawable = MakeCallbackDrawable();
+    return callbackDrawable->Draw(aContext, aFillRect, aExtendMode,
+                                  aSamplingFilter, aOpacity, aTransform);
+  }
+
+  gfxMatrix oldMatrix = mPattern->GetMatrix();
+  mPattern->SetMatrix(aTransform * oldMatrix);
+  DrawOptions drawOptions(aOpacity);
+  aDrawTarget.FillRect(ToRect(aFillRect), *mPattern->GetPattern(&aDrawTarget),
+                       drawOptions);
+  mPattern->SetMatrix(oldMatrix);
+  return true;
+}