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fix crash when minimizing window in gdi+ display method

This commit is contained in:
zeromus 2015-07-27 09:58:22 -05:00
parent 644a17dc19
commit 1789ffaaf0
1 changed files with 12 additions and 2 deletions
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14
Bizware/BizHawk.Bizware.BizwareGL.GdiPlus/IGL_GdiPlus.cs
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@ -287,8 +287,18 @@ namespace BizHawk.Bizware.BizwareGL.Drivers.GdiPlus
public Matrix4 CreateGuiProjectionMatrix(sd.Size dims)
{
Matrix4 ret = Matrix4.Identity;
ret.M11 = 2.0f / (float)dims.Width;
ret.M22 = 2.0f / (float)dims.Height;
//must handle 0s here otherwise we generate infinity and that causes problems later with gdi+
//gdi+ is additionally sensitive to otherwise reasonable (say, 0,0,0,0 matrices) so use a 1 here i guess
if (dims.Width == 0)
ret.M11 = 1;
else ret.M11 = 2.0f / (float)dims.Width;
if (dims.Height == 0)
ret.M22 = 1;
else ret.M22 = 2.0f / (float)dims.Height;
return ret;
}