// The chunk5 scenery interpreter (SceneryInterpreterStep and its
// opcode handlers), running over the RAM image with the stream cursor
// at $8B/$8C exactly as the 6502 code does.

#ifndef SCENERY_VM_H
#define SCENERY_VM_H

#include <stdbool.h>
#include <stdint.h>

// Bind the vertex pipeline to fs2Ram. Call once at start-up.
void sceneryInit(void);

// ProcessScenery (L6006): latch the per-frame lookup gates and run the
// stream at $8B.
void sceneryProcessScenery(void);

// SceneryInterpreterEntry: clear the clip flags and run the stream.
void sceneryInterpreterEntry(void);

// SceneryInterpreterStep: run the stream at $8B until it ends or an
// opcode returns ($19, or $0E on 48K).
void sceneryInterpreterStep(void);

// FlipPagesFillViewport turns EmitClippedLine's `jsr DrawColorLine`
// into a harmless ORA while it projects the horizon polygon.
void scenerySetEmitLineEnabled(bool enabled);

// SceneryOpAdvanceAndContinue: advance $8B by `n`; the following
// SceneryInterpreterEntry clears the clip flags.
void sceneryAdvance(uint8_t n);

#endif