1 files changed, 203 insertions, 0 deletions
diff --git a/gfx/thebes/gfxPattern.cpp b/gfx/thebes/gfxPattern.cpp
new file mode 100644
index 0000000000..709776dbed
--- /dev/null
+++ b/gfx/thebes/gfxPattern.cpp
@@ -0,0 +1,203 @@
+/* -*- 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 "gfxPattern.h"
+
+#include "gfxUtils.h"
+#include "gfxTypes.h"
+#include "gfxPlatform.h"
+#include "gfx2DGlue.h"
+#include "gfxGradientCache.h"
+#include "mozilla/gfx/2D.h"
+
+#include "cairo.h"
+
+#include <vector>
+
+using namespace mozilla::gfx;
+
+gfxPattern::gfxPattern(const DeviceColor& aColor) : mExtend(ExtendMode::CLAMP) {
+  mGfxPattern.InitColorPattern(aColor);
+}
+
+// linear
+gfxPattern::gfxPattern(gfxFloat x0, gfxFloat y0, gfxFloat x1, gfxFloat y1)
+    : mExtend(ExtendMode::CLAMP) {
+  mGfxPattern.InitLinearGradientPattern(Point(x0, y0), Point(x1, y1), nullptr);
+}
+
+// radial
+gfxPattern::gfxPattern(gfxFloat cx0, gfxFloat cy0, gfxFloat radius0,
+                       gfxFloat cx1, gfxFloat cy1, gfxFloat radius1)
+    : mExtend(ExtendMode::CLAMP) {
+  mGfxPattern.InitRadialGradientPattern(Point(cx0, cy0), Point(cx1, cy1),
+                                        radius0, radius1, nullptr);
+}
+
+// conic
+gfxPattern::gfxPattern(gfxFloat cx, gfxFloat cy, gfxFloat angle,
+                       gfxFloat startOffset, gfxFloat endOffset)
+    : mExtend(ExtendMode::CLAMP) {
+  mGfxPattern.InitConicGradientPattern(Point(cx, cy), angle, startOffset,
+                                       endOffset, nullptr);
+}
+
+// Azure
+gfxPattern::gfxPattern(SourceSurface* aSurface,
+                       const Matrix& aPatternToUserSpace)
+    : mPatternToUserSpace(aPatternToUserSpace), mExtend(ExtendMode::CLAMP) {
+  mGfxPattern.InitSurfacePattern(
+      aSurface, mExtend, Matrix(),  // matrix is overridden in GetPattern()
+      mozilla::gfx::SamplingFilter::GOOD);
+}
+
+void gfxPattern::AddColorStop(gfxFloat offset, const DeviceColor& c) {
+  if (mGfxPattern.GetPattern()->GetType() != PatternType::LINEAR_GRADIENT &&
+      mGfxPattern.GetPattern()->GetType() != PatternType::RADIAL_GRADIENT &&
+      mGfxPattern.GetPattern()->GetType() != PatternType::CONIC_GRADIENT) {
+    return;
+  }
+
+  mStops = nullptr;
+
+  GradientStop stop;
+  stop.offset = offset;
+  stop.color = c;
+  mStopsList.AppendElement(stop);
+}
+
+void gfxPattern::SetColorStops(GradientStops* aStops) { mStops = aStops; }
+
+void gfxPattern::CacheColorStops(const DrawTarget* aDT) {
+  mStops = gfxGradientCache::GetOrCreateGradientStops(aDT, mStopsList, mExtend);
+}
+
+void gfxPattern::SetMatrix(const gfxMatrix& aPatternToUserSpace) {
+  mPatternToUserSpace = ToMatrix(aPatternToUserSpace);
+  // Cairo-pattern matrices specify the conversion from DrawTarget to pattern
+  // space. Azure pattern matrices specify the conversion from pattern to
+  // DrawTarget space.
+  mPatternToUserSpace.Invert();
+}
+
+gfxMatrix gfxPattern::GetMatrix() const {
+  // invert at the higher precision of gfxMatrix
+  // cause we need to convert at some point anyways
+  gfxMatrix mat = ThebesMatrix(mPatternToUserSpace);
+  mat.Invert();
+  return mat;
+}
+
+gfxMatrix gfxPattern::GetInverseMatrix() const {
+  return ThebesMatrix(mPatternToUserSpace);
+}
+
+Pattern* gfxPattern::GetPattern(const DrawTarget* aTarget,
+                                const Matrix* aOriginalUserToDevice) {
+  Matrix patternToUser = mPatternToUserSpace;
+
+  if (aOriginalUserToDevice &&
+      !aOriginalUserToDevice->FuzzyEquals(aTarget->GetTransform())) {
+    // mPatternToUserSpace maps from pattern space to the original user space,
+    // but aTarget now has a transform to a different user space.  In order for
+    // the Pattern* that we return to be usable in aTarget's new user space we
+    // need the Pattern's mMatrix to be the transform from pattern space to
+    // aTarget's -new- user space.  That transform is equivalent to the
+    // transform from pattern space to original user space (patternToUser),
+    // multiplied by the transform from original user space to device space,
+    // multiplied by the transform from device space to current user space.
+
+    Matrix deviceToCurrentUser = aTarget->GetTransform();
+    deviceToCurrentUser.Invert();
+
+    patternToUser =
+        patternToUser * *aOriginalUserToDevice * deviceToCurrentUser;
+  }
+  patternToUser.NudgeToIntegers();
+
+  if (!mStops && !mStopsList.IsEmpty()) {
+    mStops = aTarget->CreateGradientStops(mStopsList.Elements(),
+                                          mStopsList.Length(), mExtend);
+  }
+
+  switch (mGfxPattern.GetPattern()->GetType()) {
+    case PatternType::SURFACE: {
+      SurfacePattern* surfacePattern =
+          static_cast<SurfacePattern*>(mGfxPattern.GetPattern());
+      surfacePattern->mMatrix = patternToUser;
+      surfacePattern->mExtendMode = mExtend;
+      break;
+    }
+    case PatternType::LINEAR_GRADIENT: {
+      LinearGradientPattern* linearGradientPattern =
+          static_cast<LinearGradientPattern*>(mGfxPattern.GetPattern());
+      linearGradientPattern->mMatrix = patternToUser;
+      linearGradientPattern->mStops = mStops;
+      break;
+    }
+    case PatternType::RADIAL_GRADIENT: {
+      RadialGradientPattern* radialGradientPattern =
+          static_cast<RadialGradientPattern*>(mGfxPattern.GetPattern());
+      radialGradientPattern->mMatrix = patternToUser;
+      radialGradientPattern->mStops = mStops;
+      break;
+    }
+    case PatternType::CONIC_GRADIENT: {
+      ConicGradientPattern* conicGradientPattern =
+          static_cast<ConicGradientPattern*>(mGfxPattern.GetPattern());
+      conicGradientPattern->mMatrix = patternToUser;
+      conicGradientPattern->mStops = mStops;
+      break;
+    }
+    default:
+      /* Reassure the compiler we are handling all the enum values.  */
+      break;
+  }
+
+  return mGfxPattern.GetPattern();
+}
+
+void gfxPattern::SetExtend(ExtendMode aExtend) {
+  mExtend = aExtend;
+  mStops = nullptr;
+}
+
+bool gfxPattern::IsOpaque() {
+  if (mGfxPattern.GetPattern()->GetType() != PatternType::SURFACE) {
+    return false;
+  }
+
+  if (static_cast<SurfacePattern*>(mGfxPattern.GetPattern())
+          ->mSurface->GetFormat() == SurfaceFormat::B8G8R8X8) {
+    return true;
+  }
+  return false;
+}
+
+void gfxPattern::SetSamplingFilter(mozilla::gfx::SamplingFilter filter) {
+  if (mGfxPattern.GetPattern()->GetType() != PatternType::SURFACE) {
+    return;
+  }
+
+  static_cast<SurfacePattern*>(mGfxPattern.GetPattern())->mSamplingFilter =
+      filter;
+}
+
+SamplingFilter gfxPattern::SamplingFilter() const {
+  if (mGfxPattern.GetPattern()->GetType() != PatternType::SURFACE) {
+    return mozilla::gfx::SamplingFilter::GOOD;
+  }
+  return static_cast<const SurfacePattern*>(mGfxPattern.GetPattern())
+      ->mSamplingFilter;
+}
+
+bool gfxPattern::GetSolidColor(DeviceColor& aColorOut) {
+  if (mGfxPattern.GetPattern()->GetType() == PatternType::COLOR) {
+    aColorOut = static_cast<ColorPattern*>(mGfxPattern.GetPattern())->mColor;
+    return true;
+  }
+
+  return false;
+}