[Libreoffice-commits] core.git: vcl/headless vcl/source

[Vasily Melenchuk]

 vcl/headless/svpgdi.cxx    |   25 ++++++++++++++++++++++++-
 vcl/source/gdi/pngread.cxx |   10 +---------
 2 files changed, 25 insertions(+), 10 deletions(-)

New commits:
commit 25cd843664919974f0d21ca7a0b02cc43e9eeabb
Author: Vasily Melenchuk <Vasily.Melenchuk at cib.de>
Date:   Tue Feb 27 19:08:35 2018 +0300

    tdf#115297: alternative fix for displaying 1bit images
    
    Previous fixes for 1bit monochrome / paletted images produced some
    regressions, so here is attempt to fix problem at the root.
    
    Partially reverted 66dbd4da3afcadb1393daf9be9cecff71b86509a and
    fixed in a different way without tdf#115297, tdf#114726 and related.
    
    Change-Id: I6849ed5ac41770ba905c930065c80e58509dba2e
    Reviewed-on: https://gerrit.libreoffice.org/50454
    Reviewed-by: Thorsten Behrens <Thorsten.Behrens at CIB.de>
    Tested-by: Thorsten Behrens <Thorsten.Behrens at CIB.de>

diff --git a/vcl/headless/svpgdi.cxx b/vcl/headless/svpgdi.cxx
index a532ce7c2358..bc89f4b84698 100644
--- a/vcl/headless/svpgdi.cxx
+++ b/vcl/headless/svpgdi.cxx
@@ -1200,10 +1200,33 @@ void SvpSalGraphics::copyBits( const SalTwoRect& rTR,
         cairo_surface_destroy(pCopy);
 }
 
+namespace
+{
+    bool isBlackWhite(const SalBitmap& rBitmap)
+    {
+        const SvpSalBitmap& rSrcBmp = static_cast<const SvpSalBitmap&>(rBitmap);
+        const BitmapBuffer * pSourceBuffer = rSrcBmp.GetBuffer();
+        const BitmapPalette & rPalette = pSourceBuffer->maPalette;
+
+        return (
+            rPalette.GetEntryCount() < 2 ||
+
+            (rPalette.GetEntryCount() == 2 &&
+            rPalette[0] == Color(COL_BLACK) &&
+            rPalette[1] == Color(COL_WHITE) ) ||
+
+            (rPalette.GetEntryCount() == 2 &&
+            rPalette[1] == Color(COL_BLACK) &&
+            rPalette[0] == Color(COL_WHITE) )
+            );
+    }
+}
+
 void SvpSalGraphics::drawBitmap(const SalTwoRect& rTR, const SalBitmap& rSourceBitmap)
 {
-    if (rSourceBitmap.GetBitCount() == 1)
+    if (rSourceBitmap.GetBitCount() == 1 && isBlackWhite(rSourceBitmap))
     {
+        // This way we draw only monochrome b/w bitmaps
         MaskHelper aMask(rSourceBitmap);
         cairo_surface_t* source = aMask.getMask();
         copySource(rTR, source);
diff --git a/vcl/source/gdi/pngread.cxx b/vcl/source/gdi/pngread.cxx
index 7e6674819925..49844f028cd6 100644
--- a/vcl/source/gdi/pngread.cxx
+++ b/vcl/source/gdi/pngread.cxx
@@ -535,19 +535,11 @@ bool PNGReaderImpl::ImplReadHeader( const Size& rPreviewSizeHint )
         {
             switch ( mnPngDepth )
             {
-                case 1 :
-#if defined(UNX) && !defined(MACOSX)
-                    // 1bpp indexed images are so badly mishandled by rest of LO on X11 that we
-                    // don't even bother, and turn them into 8bpp indexed ones with just two palette
-                    // entries instead.
-                    mnTargetDepth = 8;  // we have to expand the bitmap
-#endif
-                    mbPalette = false;
-                    break;
                 case 2 :
                     mnTargetDepth = 4;  // we have to expand the bitmap
                     mbPalette = false;
                     break;
+                case 1 :
                 case 4 :
                 case 8 :
                     mbPalette = false;