Blame SOURCES/0212-vcl-aAlphaBitmap.ImplGetImpBitmap-seen-as-0.patch

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From 812ccd30a4d088f81c1aef29296aa702a0ba03b3 Mon Sep 17 00:00:00 2001
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From: Miklos Vajna <vmiklos@collabora.co.uk>
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Date: Thu, 15 Oct 2015 17:18:28 +0200
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Subject: [PATCH 212/398] vcl: aAlphaBitmap.ImplGetImpBitmap() seen as 0
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Change-Id: I3f34f0315045d33ff6e498e24c0dacb0aabb0ff9
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(cherry picked from commit 293dd731e9815c06ba8eca1fb83d86276103c820)
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---
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 desktop/qa/desktop_lib/test_desktop_lib.cxx |  8 ++++++++
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 vcl/source/outdev/bitmap.cxx                | 11 +++++++----
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 2 files changed, 15 insertions(+), 4 deletions(-)
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diff --git a/desktop/qa/desktop_lib/test_desktop_lib.cxx b/desktop/qa/desktop_lib/test_desktop_lib.cxx
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index c3cc748a5d61..df8723b8cedd 100644
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--- a/desktop/qa/desktop_lib/test_desktop_lib.cxx
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+++ b/desktop/qa/desktop_lib/test_desktop_lib.cxx
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@@ -298,6 +298,14 @@ void DesktopLOKTest::testPaintTile()
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     // 256.
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     pDocument->pClass->paintTile(pDocument, aBuffer.data(), nCanvasWidth, nCanvasHeight, nTilePosX, nTilePosY, nTileWidth, nTileHeight);
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+    // This crashed in OutputDevice::DrawDeviceAlphaBitmap().
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+    nCanvasWidth = 200;
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+    nCanvasHeight = 200;
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+    nTileWidth = 4000;
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+    nTileHeight = 4000;
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+    aBuffer.resize(nCanvasWidth * nCanvasHeight * 4);
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+    pDocument->pClass->paintTile(pDocument, aBuffer.data(), nCanvasWidth, nCanvasHeight, nTilePosX, nTilePosY, nTileWidth, nTileHeight);
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+
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     closeDoc();
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 }
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diff --git a/vcl/source/outdev/bitmap.cxx b/vcl/source/outdev/bitmap.cxx
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index 3f415d458878..e845562b27aa 100644
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--- a/vcl/source/outdev/bitmap.cxx
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+++ b/vcl/source/outdev/bitmap.cxx
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@@ -670,11 +670,14 @@ void OutputDevice::DrawDeviceAlphaBitmap( const Bitmap& rBmp, const AlphaMask& r
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             if (mpAlphaVDev)
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             {
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                 Bitmap aAlphaBitmap( mpAlphaVDev->GetBitmap( aRelPt, aOutSz ) );
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-                SalBitmap* pSalAlphaBmp2 = aAlphaBitmap.ImplGetImpBitmap()->ImplGetSalBitmap();
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-                if (mpGraphics->BlendAlphaBitmap(aTR, *pSalSrcBmp, *pSalAlphaBmp, *pSalAlphaBmp2, this))
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+                if (aAlphaBitmap.ImplGetImpBitmap())
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                 {
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-                    mpAlphaVDev->BlendBitmap(aTR, rAlpha);
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-                    return;
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+                    SalBitmap* pSalAlphaBmp2 = aAlphaBitmap.ImplGetImpBitmap()->ImplGetSalBitmap();
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+                    if (mpGraphics->BlendAlphaBitmap(aTR, *pSalSrcBmp, *pSalAlphaBmp, *pSalAlphaBmp2, this))
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+                    {
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+                        mpAlphaVDev->BlendBitmap(aTR, rAlpha);
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+                        return;
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+                    }
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                 }
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             }
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             else
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-- 
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2.12.0
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