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Add HDR post-process FBO pipeline with 4x MSAA

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Render the world into an off-screen MSAA RGBA16F framebuffer, resolve
to a regular texture, then blit to screen via a fullscreen quad shader.
This sets up the infrastructure for future HDR tonemapping and SSAO
(depth texture preserved for sampling). Currently a passthrough until
HDR light sources are added. Login screen bypasses the FBO and renders
directly to the default framebuffer.
This commit is contained in:
Kelsi 2026-02-04 15:21:04 -08:00
parent aeccddddeb
commit 1f672e1d73
2 changed files with 222 additions and 1 deletions
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16
include/rendering/renderer.hpp
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@ -158,6 +158,22 @@ private:
uint32_t underwaterOverlayVAO = 0;
uint32_t underwaterOverlayVBO = 0;
// Post-process FBO pipeline (HDR MSAA → resolve → tonemap)
uint32_t sceneFBO = 0; // MSAA render target
uint32_t sceneColorRBO = 0; // GL_RGBA16F multisampled renderbuffer
uint32_t sceneDepthRBO = 0; // GL_DEPTH_COMPONENT24 multisampled renderbuffer
uint32_t resolveFBO = 0; // Non-MSAA resolve target
uint32_t resolveColorTex = 0; // GL_RGBA16F resolved texture (sampled by post-process)
uint32_t resolveDepthTex = 0; // GL_DEPTH_COMPONENT24 resolved texture (for future SSAO)
uint32_t screenQuadVAO = 0;
uint32_t screenQuadVBO = 0;
std::unique_ptr<Shader> postProcessShader;
int fbWidth = 0, fbHeight = 0;
void initPostProcess(int w, int h);
void resizePostProcess(int w, int h);
void shutdownPostProcess();
pipeline::AssetManager* cachedAssetManager = nullptr;
uint32_t currentZoneId = 0;
std::string currentZoneName;