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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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8
backends/graphics/opengl/opengl-graphics.cpp
View file

@ -1245,12 +1245,16 @@ void OpenGLGraphicsManager::toggleAntialiasing() {
_transactionDetails.filterChanged = true;
}
uint OpenGLGraphicsManager::getAspectRatio() {
uint OpenGLGraphicsManager::getAspectRatio() const {
// In case we enable aspect ratio correction we force a 4/3 ratio.
// But just for 320x200 and 640x400 games, since other games do not need
// this.
// TODO: This makes OpenGL Normal behave like OpenGL Conserve, when aspect
// ratio correction is enabled, but it's better than the previous 4/3 mode
// mess at least...
if (_videoMode.aspectRatioCorrection)
if (_videoMode.aspectRatioCorrection
&& ((_videoMode.screenWidth == 320 && _videoMode.screenHeight == 200)
|| (_videoMode.screenWidth == 640 && _videoMode.screenHeight == 400)))
return 13333;
else if (_videoMode.mode == OpenGL::GFX_NORMAL)
return _videoMode.hardwareWidth * 10000 / _videoMode.hardwareHeight;

5
backends/graphics/opengl/opengl-graphics.h
View file

@ -214,10 +214,7 @@ protected:
virtual void calculateDisplaySize(int &width, int &height);
virtual void refreshDisplaySize();
/**
* Returns the current target aspect ratio x 10000
*/
virtual uint getAspectRatio();
uint getAspectRatio() const;
bool _formatBGR;

19
backends/graphics/openglsdl/openglsdl-graphics.cpp
View file

@ -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;