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Implement support for FSAA in combination with post-processing (#15392)

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- Actually it's MSAA I think, or perhaps the terms are equivalent
- I've made it fit into the existing Irrlicht architecture, but that has resulted in code duplication compared to my original "hacky" approach
- OpenGL 3.2+ and OpenGL ES 3.1+ are supported
- EDT_OPENGL3 is not required, EDT_OPENGL works too
- Helpful tutorial: https://learnopengl.com/Advanced-OpenGL/Anti-Aliasing, section "Off-screen MSAA"
- This may be rough around the edges, but in general it works
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grorp 2024-11-18 14:06:48 +01:00 • committed by GitHub
parent a8ea165042
commit 9b6a399011
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23 changed files with 290 additions and 42 deletions
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15
irr/src/COpenGLCoreCacheHandler.h
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@ -85,13 +85,19 @@ class COpenGLCoreCacheHandler
GL.BindTexture(prevTextureType, 0);
#if defined(IRR_COMPILE_GL_COMMON)
GL.Disable(prevTextureType);
GL.Enable(curTextureType);
// The "enable/disable texture" stuff is so legacy that
// it's not even allowed for multisample textures.
// (IRR_COMPILE_GL_COMMON is for the legacy driver.)
if (prevTextureType != GL_TEXTURE_2D_MULTISAMPLE)
GL.Disable(prevTextureType);
if (curTextureType != GL_TEXTURE_2D_MULTISAMPLE)
GL.Enable(curTextureType);
#endif
}
#if defined(IRR_COMPILE_GL_COMMON)
else if (!prevTexture)
GL.Enable(curTextureType);
if (curTextureType != GL_TEXTURE_2D_MULTISAMPLE)
GL.Enable(curTextureType);
#endif
GL.BindTexture(curTextureType, static_cast<const TOpenGLTexture *>(texture)->getOpenGLTextureName());
@ -110,7 +116,8 @@ class COpenGLCoreCacheHandler
GL.BindTexture(prevTextureType, 0);
#if defined(IRR_COMPILE_GL_COMMON)
GL.Disable(prevTextureType);
if (prevTextureType != GL_TEXTURE_2D_MULTISAMPLE)
GL.Disable(prevTextureType);
#endif
}