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OPENGL: Fix aspect ratio correction behavior.

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Now only 320x200 and 640x400 will result in aspect ratio correction to be used
if the user requested it. This should fix some strechting in Myst/Riven.
This commit is contained in:
Johannes Schickel 2011-08-12 04:06:54 +02:00
parent a77c29327e
commit b8dcd9a25e
3 changed files with 18 additions and 14 deletions
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19
backends/graphics/openglsdl/openglsdl-graphics.cpp
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@ -313,14 +313,17 @@ bool OpenGLSdlGraphicsManager::loadGFXMode() {
_videoMode.overlayWidth = _videoMode.hardwareWidth = _videoMode.screenWidth * scaleFactor;
_videoMode.overlayHeight = _videoMode.hardwareHeight = _videoMode.screenHeight * scaleFactor;
int screenAspectRatio = _videoMode.screenWidth * 10000 / _videoMode.screenHeight;
int desiredAspectRatio = getAspectRatio();
// Do not downscale dimensions, only enlarge them if needed
if (screenAspectRatio > desiredAspectRatio)
_videoMode.hardwareHeight = (_videoMode.overlayWidth * 10000 + 5000) / desiredAspectRatio;
else if (screenAspectRatio < desiredAspectRatio)
_videoMode.hardwareWidth = (_videoMode.overlayHeight * desiredAspectRatio + 5000) / 10000;
// The only modes where we need to adapt the aspect ratio are 320x200
// and 640x400. That is since our aspect ratio correction in fact is
// only used to ensure that the original pixel size aspect for these
// modes is used.
// (Non-square pixels on old monitors vs square pixel on new ones).
if (_videoMode.aspectRatioCorrection
&& ((_videoMode.screenWidth == 320 && _videoMode.screenHeight == 200)
|| (_videoMode.screenWidth == 640 && _videoMode.screenHeight == 400)))
_videoMode.overlayHeight = _videoMode.hardwareHeight = 240 * scaleFactor;
else
_videoMode.overlayHeight = _videoMode.hardwareHeight = _videoMode.screenHeight * scaleFactor;
}
_screenResized = false;