Add m-esr52 at 52.6.0

1 files changed, 320 insertions, 0 deletions

diff --git a/gfx/thebes/gfxWindowsNativeDrawing.cpp b/gfx/thebes/gfxWindowsNativeDrawing.cpp
new file mode 100644
index 000000000..bd2f78d21
--- /dev/null
+++ b/gfx/thebes/gfxWindowsNativeDrawing.cpp
@@ -0,0 +1,320 @@
+/* -*- 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 <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->CurrentMatrix();
+        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 = gfxSize(1.0, 1.0);
+
+                // 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(true);
+
+                mWorldTransform.eM11 = (FLOAT) mScale.width;
+                mWorldTransform.eM12 = 0.0f;
+                mWorldTransform.eM21 = 0.0f;
+                mWorldTransform.eM22 = (FLOAT) mScale.height;
+                mWorldTransform.eDx  = 0.0f;
+                mWorldTransform.eDy  = 0.0f;
+
+                // See comment above about "+1"
+                mTempSurfaceSize =
+                    IntSize((int32_t) ceil(mNativeRect.Width() * mScale.width + 1),
+                               (int32_t) ceil(mNativeRect.Height() * mScale.height + 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.width, 1.0 / mScale.height);
+            SamplingFilter filter = (mNativeDrawFlags & DO_NEAREST_NEIGHBOR_FILTERING)
+                                  ? SamplingFilter::LINEAR
+                                  : SamplingFilter::GOOD;
+            SurfacePattern pat(source, ExtendMode::CLAMP, m, filter);
+            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());
+}