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Fixed graphical glitch with scanlines in TV modes when using non-integral 

fullscreen scaling.


git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@2463 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba
This commit is contained in:
stephena 2012-05-09 16:06:19 +00:00
parent f59f5ab5e8
commit 6314ef2549
1 changed files with 8 additions and 2 deletions
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10
src/common/FBSurfaceTIA.cxx
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@ -19,6 +19,8 @@
#ifdef DISPLAY_OPENGL
#include <cmath>
#include "Font.hxx"
#include "FrameBufferGL.hxx"
#include "TIA.hxx"
@ -373,12 +375,16 @@ void FBSurfaceTIA::updateCoords()
// Upper right (x+w,y)
myCoord[26] = 1.0f;
myCoord[27] = 0.0f;
// Scanline repeating is sensitive to non-integral vertical resolution,
// so rounding is performed to eliminate it
// This won't be 100% accurate, but non-integral scaling isn't 100%
// accurate anyway
// Lower left (x,y+h)
myCoord[28] = 0.0f;
myCoord[29] = GLfloat(myImageH) / (myImageH / myBaseH);
myCoord[29] = GLfloat(myImageH) / roundf((float)myImageH / myBaseH);
// Lower right (x+w,y+h)
myCoord[30] = 1.0f;
myCoord[31] = GLfloat(myImageH) / (myImageH / myBaseH);
myCoord[31] = myCoord[29];
// Cache vertex and texture coordinates using vertex buffer object
if(myFB.myVBOAvailable)