From 99a034f91471b410d2437b6651be7ef10091549b Mon Sep 17 00:00:00 2001
From: Zolnai Tamás <tamas.zolnai@collabora.com>
Date: Sun, 27 Apr 2014 20:25:52 +0200
Subject: OpenGLHelper: extract BGRA buffer -> BitmepEx conversion
Change-Id: I71edb2768d24f0c6686a9c94333447a5acc498b4
---
vcl/source/opengl/OpenGLHelper.cxx | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
(limited to 'vcl/source/opengl/OpenGLHelper.cxx')
diff --git a/vcl/source/opengl/OpenGLHelper.cxx b/vcl/source/opengl/OpenGLHelper.cxx
index 35760f2de72c..82b4a9affc03 100644
--- a/vcl/source/opengl/OpenGLHelper.cxx
+++ b/vcl/source/opengl/OpenGLHelper.cxx
@@ -168,4 +168,33 @@ sal_uInt8* OpenGLHelper::ConvertBitmapExToRGBABuffer(const BitmapEx& rBitmapEx)
return pBitmapBuf;
}
+BitmapEx OpenGLHelper::ConvertBGRABufferToBitmapEx(const sal_uInt8* const pBuffer, long nWidth, long nHeight)
+{
+ assert(pBuffer);
+ Bitmap aBitmap( Size(nWidth, nHeight), 24 );
+ AlphaMask aAlpha( Size(nWidth, nHeight) );
+
+ {
+ Bitmap::ScopedWriteAccess pWriteAccess( aBitmap );
+ AlphaMask::ScopedWriteAccess pAlphaWriteAccess( aAlpha );
+
+ size_t nCurPos = 0;
+ for( int y = 0; y < nHeight; ++y)
+ {
+ Scanline pScan = pWriteAccess->GetScanline(y);
+ Scanline pAlphaScan = pAlphaWriteAccess->GetScanline(y);
+ for( int x = 0; x < nWidth; ++x )
+ {
+ *pScan++ = pBuffer[nCurPos];
+ *pScan++ = pBuffer[nCurPos+1];
+ *pScan++ = pBuffer[nCurPos+2];
+
+ nCurPos += 3;
+ *pAlphaScan++ = static_cast<sal_uInt8>( 255 - pBuffer[nCurPos++] );
+ }
+ }
+ }
+ return BitmapEx(aBitmap, aAlpha);
+}
+
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
--
cgit