Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 302 insertions, 0 deletions

diff --git a/gfx/thebes/gfxWindowsNativeDrawing.cpp b/gfx/thebes/gfxWindowsNativeDrawing.cpp
new file mode 100644
index 0000000000..548ec56869
--- /dev/null
+++ b/gfx/thebes/gfxWindowsNativeDrawing.cpp
@@ -0,0 +1,302 @@
+/* -*- 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 <windows.h>
+
+#include "nsMathUtils.h"
+
+#include "gfxWindowsNativeDrawing.h"
+#include "gfxWindowsSurface.h"
+#include "gfxAlphaRecovery.h"
+#include "gfxPattern.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/Helpers.h"
+#include "gfx2DGlue.h"
+
+#include "cairo.h"
+#include "cairo-win32.h"
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+
+enum {
+  RENDER_STATE_INIT,
+
+  RENDER_STATE_NATIVE_DRAWING,
+  RENDER_STATE_NATIVE_DRAWING_DONE,
+
+  RENDER_STATE_ALPHA_RECOVERY_BLACK,
+  RENDER_STATE_ALPHA_RECOVERY_BLACK_DONE,
+  RENDER_STATE_ALPHA_RECOVERY_WHITE,
+  RENDER_STATE_ALPHA_RECOVERY_WHITE_DONE,
+
+  RENDER_STATE_DONE
+};
+
+gfxWindowsNativeDrawing::gfxWindowsNativeDrawing(gfxContext* ctx,
+                                                 const gfxRect& nativeRect,
+                                                 uint32_t nativeDrawFlags)
+    : mContext(ctx),
+      mNativeRect(nativeRect),
+      mNativeDrawFlags(nativeDrawFlags),
+      mRenderState(RENDER_STATE_INIT) {}
+
+HDC gfxWindowsNativeDrawing::BeginNativeDrawing() {
+  if (mRenderState == RENDER_STATE_INIT) {
+    RefPtr<gfxASurface> surf;
+    DrawTarget* drawTarget = mContext->GetDrawTarget();
+    cairo_t* cairo = nullptr;
+    if (drawTarget->GetBackendType() == BackendType::CAIRO) {
+      cairo = static_cast<cairo_t*>(
+          drawTarget->GetNativeSurface(NativeSurfaceType::CAIRO_CONTEXT));
+      if (cairo) {
+        cairo_surface_t* s = cairo_get_group_target(cairo);
+        if (s) {
+          mDeviceOffset = mContext->GetDeviceOffset();
+          double sdx, sdy;
+          cairo_surface_get_device_offset(s, &sdx, &sdy);
+          mDeviceOffset.x -= sdx;
+          mDeviceOffset.y -= sdy;
+          surf = gfxASurface::Wrap(s);
+        }
+      }
+    }
+
+    if (surf && surf->CairoStatus() != 0) return nullptr;
+
+    gfxMatrix m = mContext->CurrentMatrixDouble();
+    if (!m.HasNonTranslation())
+      mTransformType = TRANSLATION_ONLY;
+    else if (m.HasNonAxisAlignedTransform())
+      mTransformType = COMPLEX;
+    else
+      mTransformType = AXIS_ALIGNED_SCALE;
+
+    // if this is a native win32 surface, we don't have to
+    // redirect rendering to our own HDC; in some cases,
+    // we may be able to use the HDC from the surface directly.
+    if (surf && ((surf->GetType() == gfxSurfaceType::Win32 ||
+                  surf->GetType() == gfxSurfaceType::Win32Printing) &&
+                 (surf->GetContentType() == gfxContentType::COLOR ||
+                  (surf->GetContentType() == gfxContentType::COLOR_ALPHA &&
+                   (mNativeDrawFlags & CAN_DRAW_TO_COLOR_ALPHA))))) {
+      // grab the DC. This can fail if there is a complex clipping path,
+      // in which case we'll have to fall back.
+      mWinSurface = static_cast<gfxWindowsSurface*>(
+          static_cast<gfxASurface*>(surf.get()));
+      mDC = cairo_win32_get_dc_with_clip(cairo);
+
+      if (mDC) {
+        if (mTransformType == TRANSLATION_ONLY) {
+          mRenderState = RENDER_STATE_NATIVE_DRAWING;
+
+          mTranslation = m.GetTranslation();
+        } else if (((mTransformType == AXIS_ALIGNED_SCALE) &&
+                    (mNativeDrawFlags & CAN_AXIS_ALIGNED_SCALE)) ||
+                   (mNativeDrawFlags & CAN_COMPLEX_TRANSFORM)) {
+          mWorldTransform.eM11 = (FLOAT)m._11;
+          mWorldTransform.eM12 = (FLOAT)m._12;
+          mWorldTransform.eM21 = (FLOAT)m._21;
+          mWorldTransform.eM22 = (FLOAT)m._22;
+          mWorldTransform.eDx = (FLOAT)m._31;
+          mWorldTransform.eDy = (FLOAT)m._32;
+
+          mRenderState = RENDER_STATE_NATIVE_DRAWING;
+        }
+      }
+    }
+
+    // If we couldn't do native drawing, then we have to do two-buffer drawing
+    // and do alpha recovery
+    if (mRenderState == RENDER_STATE_INIT) {
+      mRenderState = RENDER_STATE_ALPHA_RECOVERY_BLACK;
+
+      // We round out our native rect here, that way the snapping will
+      // happen correctly.
+      mNativeRect.RoundOut();
+
+      // we only do the scale bit if we can do an axis aligned
+      // scale; otherwise we scale (if necessary) after
+      // rendering with cairo.  Note that if we're doing alpha recovery,
+      // we cannot do a full complex transform with win32 (I mean, we could, but
+      // it would require more code that's not here.)
+      if (mTransformType == TRANSLATION_ONLY ||
+          !(mNativeDrawFlags & CAN_AXIS_ALIGNED_SCALE)) {
+        mScale = MatrixScalesDouble();
+
+        // Add 1 to the surface size; it's guaranteed to not be incorrect,
+        // and it fixes bug 382458
+        // There's probably a better fix, but I haven't figured out
+        // the root cause of the problem.
+        mTempSurfaceSize = IntSize((int32_t)ceil(mNativeRect.Width() + 1),
+                                   (int32_t)ceil(mNativeRect.Height() + 1));
+      } else {
+        // figure out the scale factors
+        mScale = m.ScaleFactors();
+
+        mWorldTransform.eM11 = (FLOAT)mScale.xScale;
+        mWorldTransform.eM12 = 0.0f;
+        mWorldTransform.eM21 = 0.0f;
+        mWorldTransform.eM22 = (FLOAT)mScale.yScale;
+        mWorldTransform.eDx = 0.0f;
+        mWorldTransform.eDy = 0.0f;
+
+        // See comment above about "+1"
+        mTempSurfaceSize =
+            IntSize((int32_t)ceil(mNativeRect.Width() * mScale.xScale + 1),
+                    (int32_t)ceil(mNativeRect.Height() * mScale.yScale + 1));
+      }
+    }
+  }
+
+  if (mRenderState == RENDER_STATE_NATIVE_DRAWING) {
+    // we can just do native drawing directly to the context's surface
+
+    // do we need to use SetWorldTransform?
+    if (mTransformType != TRANSLATION_ONLY) {
+      SetGraphicsMode(mDC, GM_ADVANCED);
+      GetWorldTransform(mDC, &mOldWorldTransform);
+      SetWorldTransform(mDC, &mWorldTransform);
+    }
+    GetViewportOrgEx(mDC, &mOrigViewportOrigin);
+    SetViewportOrgEx(mDC, mOrigViewportOrigin.x - (int)mDeviceOffset.x,
+                     mOrigViewportOrigin.y - (int)mDeviceOffset.y, nullptr);
+
+    return mDC;
+  } else if (mRenderState == RENDER_STATE_ALPHA_RECOVERY_BLACK ||
+             mRenderState == RENDER_STATE_ALPHA_RECOVERY_WHITE) {
+    // we're going to use mWinSurface to create our temporary surface here
+
+    // get us a RGB24 DIB; DIB is important, because
+    // we can later call GetImageSurface on it.
+    mWinSurface = new gfxWindowsSurface(mTempSurfaceSize);
+    mDC = mWinSurface->GetDC();
+
+    RECT r = {0, 0, mTempSurfaceSize.width, mTempSurfaceSize.height};
+    if (mRenderState == RENDER_STATE_ALPHA_RECOVERY_BLACK)
+      FillRect(mDC, &r, (HBRUSH)GetStockObject(BLACK_BRUSH));
+    else
+      FillRect(mDC, &r, (HBRUSH)GetStockObject(WHITE_BRUSH));
+
+    if ((mTransformType != TRANSLATION_ONLY) &&
+        (mNativeDrawFlags & CAN_AXIS_ALIGNED_SCALE)) {
+      SetGraphicsMode(mDC, GM_ADVANCED);
+      SetWorldTransform(mDC, &mWorldTransform);
+    }
+
+    return mDC;
+  } else {
+    NS_ERROR("Bogus render state!");
+    return nullptr;
+  }
+}
+
+bool gfxWindowsNativeDrawing::ShouldRenderAgain() {
+  switch (mRenderState) {
+    case RENDER_STATE_NATIVE_DRAWING_DONE:
+      return false;
+
+    case RENDER_STATE_ALPHA_RECOVERY_BLACK_DONE:
+      mRenderState = RENDER_STATE_ALPHA_RECOVERY_WHITE;
+      return true;
+
+    case RENDER_STATE_ALPHA_RECOVERY_WHITE_DONE:
+      return false;
+
+    default:
+      NS_ERROR(
+          "Invalid RenderState in gfxWindowsNativeDrawing::ShouldRenderAgain");
+      break;
+  }
+
+  return false;
+}
+
+void gfxWindowsNativeDrawing::EndNativeDrawing() {
+  if (mRenderState == RENDER_STATE_NATIVE_DRAWING) {
+    // we drew directly to the HDC in the context; undo our changes
+    SetViewportOrgEx(mDC, mOrigViewportOrigin.x, mOrigViewportOrigin.y,
+                     nullptr);
+
+    if (mTransformType != TRANSLATION_ONLY)
+      SetWorldTransform(mDC, &mOldWorldTransform);
+
+    mWinSurface->MarkDirty();
+
+    mRenderState = RENDER_STATE_NATIVE_DRAWING_DONE;
+  } else if (mRenderState == RENDER_STATE_ALPHA_RECOVERY_BLACK) {
+    mBlackSurface = mWinSurface;
+    mWinSurface = nullptr;
+
+    mRenderState = RENDER_STATE_ALPHA_RECOVERY_BLACK_DONE;
+  } else if (mRenderState == RENDER_STATE_ALPHA_RECOVERY_WHITE) {
+    mWhiteSurface = mWinSurface;
+    mWinSurface = nullptr;
+
+    mRenderState = RENDER_STATE_ALPHA_RECOVERY_WHITE_DONE;
+  } else {
+    NS_ERROR(
+        "Invalid RenderState in gfxWindowsNativeDrawing::EndNativeDrawing");
+  }
+}
+
+void gfxWindowsNativeDrawing::PaintToContext() {
+  if (mRenderState == RENDER_STATE_NATIVE_DRAWING_DONE) {
+    // nothing to do, it already went to the context
+    mRenderState = RENDER_STATE_DONE;
+  } else if (mRenderState == RENDER_STATE_ALPHA_RECOVERY_WHITE_DONE) {
+    RefPtr<gfxImageSurface> black = mBlackSurface->GetAsImageSurface();
+    RefPtr<gfxImageSurface> white = mWhiteSurface->GetAsImageSurface();
+    if (!gfxAlphaRecovery::RecoverAlpha(black, white)) {
+      NS_ERROR("Alpha recovery failure");
+      return;
+    }
+    RefPtr<DataSourceSurface> source = Factory::CreateWrappingDataSourceSurface(
+        black->Data(), black->Stride(), black->GetSize(),
+        SurfaceFormat::B8G8R8A8);
+    {
+      DrawTarget* dt = mContext->GetDrawTarget();
+      AutoRestoreTransform autoRestoreTransform(dt);
+
+      Matrix newTransform = dt->GetTransform();
+      newTransform.PreTranslate(ToPoint(mNativeRect.TopLeft()));
+      dt->SetTransform(newTransform);
+
+      Rect rect(Point(0.0, 0.0), ToSize(mNativeRect.Size()));
+      Matrix m = Matrix::Scaling(1.0 / mScale.xScale, 1.0 / mScale.yScale);
+      SurfacePattern pat(source, ExtendMode::CLAMP, m);
+      dt->FillRect(rect, pat);
+    }
+
+    mRenderState = RENDER_STATE_DONE;
+  } else {
+    NS_ERROR("Invalid RenderState in gfxWindowsNativeDrawing::PaintToContext");
+  }
+}
+
+void gfxWindowsNativeDrawing::TransformToNativeRect(const gfxRect& r,
+                                                    RECT& rout) {
+  /* If we're doing native drawing, then we're still in the coordinate space
+   * of the context; otherwise, we're in our own little world,
+   * relative to the passed-in nativeRect.
+   */
+
+  gfxRect roundedRect(r);
+
+  if (mRenderState == RENDER_STATE_NATIVE_DRAWING) {
+    if (mTransformType == TRANSLATION_ONLY) {
+      roundedRect.MoveBy(mTranslation);
+    }
+  } else {
+    roundedRect.MoveBy(-mNativeRect.TopLeft());
+  }
+
+  roundedRect.Round();
+
+  rout.left = LONG(roundedRect.X());
+  rout.right = LONG(roundedRect.XMost());
+  rout.top = LONG(roundedRect.Y());
+  rout.bottom = LONG(roundedRect.YMost());
+}