diff options
author | Louis-Francis Ratté-Boulianne <lfrb@collabora.com> | 2014-11-12 18:12:00 -0500 |
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committer | Markus Mohrhard <markus.mohrhard@collabora.co.uk> | 2014-11-13 07:54:22 +0100 |
commit | 1b3dcdbecbbcd5f5f1b838366bbfe194c4188c36 (patch) | |
tree | 779006bf04e2256e0307ea0714e1df31a6289f40 /vcl/opengl/gdiimpl.cxx | |
parent | afd759a583e9dcbbbdda0697b57f97f8235d2741 (diff) |
vcl: Fix several coordinates calculations
Change-Id: I15878b4d91081a7ac880713ad278893aaad4a844
Diffstat (limited to 'vcl/opengl/gdiimpl.cxx')
-rw-r--r-- | vcl/opengl/gdiimpl.cxx | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/vcl/opengl/gdiimpl.cxx b/vcl/opengl/gdiimpl.cxx index 8396ffef54ab..027d9ac61174 100644 --- a/vcl/opengl/gdiimpl.cxx +++ b/vcl/opengl/gdiimpl.cxx @@ -447,7 +447,7 @@ void OpenGLSalGraphicsImpl::DrawPoint( long nX, long nY ) GLfloat pPoint[2]; pPoint[0] = 2 * nX / GetWidth() - 1.0f; - pPoint[1] = 2 * (GetHeight() - nY) / GetHeight() - 1.0f; + pPoint[1] = 1.0f - 2 * nY / GetHeight(); glEnableVertexAttribArray( GL_ATTRIB_POS ); glVertexAttribPointer( GL_ATTRIB_POS, 2, GL_FLOAT, GL_FALSE, 0, pPoint ); @@ -462,9 +462,9 @@ void OpenGLSalGraphicsImpl::DrawLine( long nX1, long nY1, long nX2, long nY2 ) GLfloat pPoints[4]; pPoints[0] = (2 * nX1) / GetWidth() - 1.0; - pPoints[1] = (2 * (GetHeight() - nY1)) / GetHeight() - 1.0; + pPoints[1] = 1.0f - 2 * nY1 / GetHeight(); pPoints[2] = (2 * nX2) / GetWidth() - 1.0;; - pPoints[3] = (2 * (GetHeight() - nY2)) / GetHeight() - 1.0; + pPoints[3] = 1.0f - 2 * nY2 / GetHeight(); glEnableVertexAttribArray( GL_ATTRIB_POS ); glVertexAttribPointer( GL_ATTRIB_POS, 2, GL_FLOAT, GL_FALSE, 0, pPoints ); @@ -504,7 +504,7 @@ void OpenGLSalGraphicsImpl::DrawConvexPolygon( sal_uInt32 nPoints, const SalPoin for( i = 0, j = 0; i < nPoints; i++, j += 2 ) { aVertices[j] = (2 * pPtAry[i].mnX) / GetWidth() - 1.0; - aVertices[j+1] = (2 * pPtAry[i].mnY) / GetHeight() - 1.0; + aVertices[j+1] = 1.0 - (2 * pPtAry[i].mnY / GetHeight()); } glEnableVertexAttribArray( GL_ATTRIB_POS ); @@ -525,7 +525,7 @@ void OpenGLSalGraphicsImpl::DrawConvexPolygon( const Polygon& rPolygon ) { const Point& rPt = rPolygon.GetPoint( i ); aVertices[j] = (2 * rPt.X()) / GetWidth() - 1.0; - aVertices[j+1] = (2 * (GetHeight() - rPt.Y())) / GetHeight() - 1.0; + aVertices[j+1] = 1.0 - (2 * rPt.Y() / GetHeight()); } glEnableVertexAttribArray( GL_ATTRIB_POS ); @@ -539,9 +539,9 @@ void OpenGLSalGraphicsImpl::DrawConvexPolygon( const Polygon& rPolygon ) void OpenGLSalGraphicsImpl::DrawRect( long nX, long nY, long nWidth, long nHeight ) { long nX1( nX ); - long nY1( GetHeight() - nY ); + long nY1( nY ); long nX2( nX + nWidth ); - long nY2( GetHeight() - nY - nHeight ); + long nY2( nY + nHeight ); const SalPoint aPoints[] = { { nX1, nY2 }, { nX1, nY1 }, { nX2, nY1 }, { nX2, nY2 }}; @@ -551,9 +551,9 @@ void OpenGLSalGraphicsImpl::DrawRect( long nX, long nY, long nWidth, long nHeigh void OpenGLSalGraphicsImpl::DrawRect( const Rectangle& rRect ) { long nX1( rRect.Left() ); - long nY1( GetHeight() - rRect.Top() ); + long nY1( rRect.Top() ); long nX2( rRect.Right() ); - long nY2( GetHeight() - rRect.Bottom() ); + long nY2( rRect.Bottom() ); const SalPoint aPoints[] = { { nX1, nY2 }, { nX1, nY1 }, { nX2, nY1 }, { nX2, nY2 }}; |