oss/luanti
oss/luanti
1
0
Fork 0
mirror of https://github.com/luanti-org/luanti.git synced 2025-08-06 17:41:04 +00:00
Code Wiki Activity

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

Browse source 
- 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
This commit is contained in:
grorp 2024-11-18 14:06:48 +01:00 • committed by GitHub
parent a8ea165042
commit 9b6a399011
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
23 changed files with 290 additions and 42 deletions
Download patch file Download diff file Expand all files Collapse all files

35
irr/src/COpenGLDriver.cpp
View file

@ -651,6 +651,29 @@ IRenderTarget *COpenGLDriver::addRenderTarget()
return renderTarget;
}
void COpenGLDriver::blitRenderTarget(IRenderTarget *from, IRenderTarget *to)
{
if (Version < 300) {
os::Printer::log("glBlitFramebuffer not supported by OpenGL < 3.0", ELL_ERROR);
return;
}
GLuint prev_fbo_id;
CacheHandler->getFBO(prev_fbo_id);
COpenGLRenderTarget *src = static_cast<COpenGLRenderTarget *>(from);
COpenGLRenderTarget *dst = static_cast<COpenGLRenderTarget *>(to);
GL.BindFramebuffer(GL.READ_FRAMEBUFFER, src->getBufferID());
GL.BindFramebuffer(GL.DRAW_FRAMEBUFFER, dst->getBufferID());
GL.BlitFramebuffer(
0, 0, src->getSize().Width, src->getSize().Height,
0, 0, dst->getSize().Width, dst->getSize().Height,
GL.COLOR_BUFFER_BIT | GL.DEPTH_BUFFER_BIT | GL.STENCIL_BUFFER_BIT, GL.NEAREST);
// This resets both read and draw framebuffer. Note that we bypass CacheHandler here.
GL.BindFramebuffer(GL.FRAMEBUFFER, prev_fbo_id);
}
// small helper function to create vertex buffer object address offsets
static inline const GLvoid *buffer_offset(const size_t offset)
{
@ -2091,7 +2114,9 @@ void COpenGLDriver::setBasicRenderStates(const SMaterial &material, const SMater
else if (lastmaterial.AntiAliasing & EAAM_ALPHA_TO_COVERAGE)
glDisable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
if ((AntiAlias >= 2) && (material.AntiAliasing & (EAAM_SIMPLE | EAAM_QUALITY))) {
// Enable MSAA even if it's not enabled in the OpenGL context, we might
// be rendering to an FBO with multisampling.
if (material.AntiAliasing & (EAAM_SIMPLE | EAAM_QUALITY)) {
glEnable(GL_MULTISAMPLE_ARB);
#ifdef GL_NV_multisample_filter_hint
if (FeatureAvailable[IRR_NV_multisample_filter_hint]) {
@ -2694,6 +2719,12 @@ IVideoDriver *COpenGLDriver::getVideoDriver()
ITexture *COpenGLDriver::addRenderTargetTexture(const core::dimension2d<u32> &size,
const io::path &name, const ECOLOR_FORMAT format)
{
return addRenderTargetTextureMs(size, 0, name, format);
}
ITexture *COpenGLDriver::addRenderTargetTextureMs(const core::dimension2d<u32> &size, u8 msaa,
const io::path &name, const ECOLOR_FORMAT format)
{
if (IImage::isCompressedFormat(format))
return 0;
@ -2711,7 +2742,7 @@ ITexture *COpenGLDriver::addRenderTargetTexture(const core::dimension2d<u32> &si
destSize = destSize.getOptimalSize((size == size.getOptimalSize()), false, false);
}
COpenGLTexture *renderTargetTexture = new COpenGLTexture(name, destSize, ETT_2D, format, this);
COpenGLTexture *renderTargetTexture = new COpenGLTexture(name, destSize, msaa > 0 ? ETT_2D_MS : ETT_2D, format, this, msaa);
addTexture(renderTargetTexture);
renderTargetTexture->drop();