Enhance bloom configuration and add color correction

[themuffinator]

Summary

• add bloom tuning cvars and keep documentation in sync
• update bloom renderer to drive new controls and handle color correction fallbacks
• integrate ACES-based color correction in shaders and post-process pipeline

Testing

• not run (not requested)

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https://chatgpt.com/codex/tasks/task_e_6907cd7df88c8326986a1a841de895b4

[chatgpt-codex-connector]

💡 Codex Review

WORR/src/refresh/main.cpp

Lines 965 to 972 in 54c6ea6

	if (gl_clear->integer) {
	if (flags & PP_BLOOM) {
	static const GLenum buffers[2] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1 };
	static const vec4_t black = { 0, 0, 0, 1 };
	qglDrawBuffers(2, buffers);
	qglClearBufferfv(GL_COLOR, 0, gl_static.clearcolor);
	qglClearBufferfv(GL_COLOR, 1, black);
	qglDrawBuffers(1, buffers);

Guard bloom clear when only color correction is active

When color correction is enabled with r_bloom disabled, GL_BindFramebuffer still sets the PP_BLOOM flag and enters the two-attachment clear path, but GL_InitFramebuffers allocates a second color attachment only when r_bloom is non‑zero. With only one attachment bound, the glDrawBuffers(2, …) and glClearBufferfv(GL_COLOR, 1, …) calls will target a non-existent buffer, triggering GL_INVALID_OPERATION and skipping the clear. The first frame after enabling color correction with gl_clear 1 will therefore render with undefined contents and log GL errors. The clear logic should either skip attachment 1 when bloom is disabled or allocate the secondary attachment whenever color correction forces PP_BLOOM.

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