Revert "Compute (un-)premultiply_table at compile time"

This reverts commit 644188bf7f3a07222f2b58a3794348197fb8ad24.  It has been found
to cause compilation failure ("vcl/source/bitmap/BitmapTools.cxx(1078): error
C2131: expression did not evaluate to a constant") with Visual Studio 2017
version 15.9, as discussed in the mail thread starting at
<https://lists.freedesktop.org/archives/libreoffice/2018-December/081500.html>
"Windows build failure - C2131: expression did not evaluate to a constant" (and
Mike thankfully filed a bug upstream,
<https://developercommunity.visualstudio.com/content/problem/398218/
c2131-error-with-stdarray-and-stdmake-integer-sequ.html>).  Also, Jenkins node
tb39 which runs the "Gerrit Windows" sub-job of Jenkins' "Gerrit for master"
job apparently has such a Visual Studio 2017 version 15.9 installed, so keeps
failing that job.

Change-Id: I87d25863f2e07474fbb2df3c8f72cd2bcc89582e
Reviewed-on: https://gerrit.libreoffice.org/64618
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

1 files changed, 4 insertions, 5 deletions

diff --git a/vcl/headless/svpgdi.cxx b/vcl/headless/svpgdi.cxx
index 0a428545f8b3..0b4bd8d377ea 100644
--- a/vcl/headless/svpgdi.cxx
+++ b/vcl/headless/svpgdi.cxx
@@ -1654,7 +1654,7 @@ void SvpSalGraphics::drawMask( const SalTwoRect& rTR,
     }
     sal_Int32 nStride;
     unsigned char *mask_data = aSurface.getBits(nStride);
-    vcl::bitmap::lookup_table const & unpremultiply_table = vcl::bitmap::get_unpremultiply_table();
+    vcl::bitmap::lookup_table unpremultiply_table = vcl::bitmap::get_unpremultiply_table();
     for (long y = rTR.mnSrcY ; y < rTR.mnSrcY + rTR.mnSrcHeight; ++y)
     {
         unsigned char *row = mask_data + (nStride*y);
@@ -1762,7 +1762,7 @@ Color SvpSalGraphics::getPixel( long nX, long nY )
     cairo_destroy(cr);
 
     cairo_surface_flush(target);
-    vcl::bitmap::lookup_table const & unpremultiply_table = vcl::bitmap::get_unpremultiply_table();
+    vcl::bitmap::lookup_table unpremultiply_table = vcl::bitmap::get_unpremultiply_table();
     unsigned char *data = cairo_image_surface_get_data(target);
     sal_uInt8 a = data[SVP_CAIRO_ALPHA];
     sal_uInt8 b = unpremultiply_table[a][data[SVP_CAIRO_BLUE]];
@@ -2096,9 +2096,8 @@ void SvpSalGraphics::releaseCairoContext(cairo_t* cr, bool bXorModeAllowed, cons
         sal_Int32 nUnscaledExtentsRight = nExtentsRight * m_fScale;
         sal_Int32 nUnscaledExtentsTop = nExtentsTop * m_fScale;
         sal_Int32 nUnscaledExtentsBottom = nExtentsBottom * m_fScale;
-        vcl::bitmap::lookup_table const & unpremultiply_table
-            = vcl::bitmap::get_unpremultiply_table();
-        vcl::bitmap::lookup_table const & premultiply_table = vcl::bitmap::get_premultiply_table();
+        vcl::bitmap::lookup_table unpremultiply_table = vcl::bitmap::get_unpremultiply_table();
+        vcl::bitmap::lookup_table premultiply_table = vcl::bitmap::get_premultiply_table();
         for (sal_Int32 y = nUnscaledExtentsTop; y < nUnscaledExtentsBottom; ++y)
         {
             unsigned char *true_row = target_surface_data + (nStride*y);