openmsx::VDPAccessSlots Namespace Reference

Classes
struct	AccessTable
class	Calculator
	VDP-VRAM access slot calculator, meant to be used in the inner loops of the VDPCmdEngine commands. More...
struct	CycleTable
struct	ZeroTable

Enumerations
enum class	Delta : int {   D0 = 0 * TICKS , D1 = 1 * TICKS , D16 = 2 * TICKS , D24 = 3 * TICKS ,   D28 = 4 * TICKS , D32 = 5 * TICKS , D40 = 6 * TICKS , D48 = 7 * TICKS ,   D64 = 8 * TICKS , D72 = 9 * TICKS , D88 = 10 * TICKS , D104 = 11 * TICKS ,   D120 = 12 * TICKS , D128 = 13 * TICKS , D136 = 14 * TICKS }

Functions
EmuTime	getAccessSlot (EmuTime::param frame, EmuTime::param time, Delta delta, const VDP &vdp)
	Return the time of the next available access slot that is at least 'delta' cycles later than 'time'.
Calculator	getCalculator (EmuTime::param frame, EmuTime::param time, EmuTime::param limit, const VDP &vdp)
	When many calls to getAccessSlot() are needed, it's more efficient to instead use this function.

Variables
constexpr int	TICKS = VDP::TICKS_PER_LINE

Enumeration Type Documentation

Delta

enum class openmsx::VDPAccessSlots::Delta : int

strong

Enumerator
D0
D1
D16
D24
D28
D32
D40
D48
D64
D72
D88
D104
D120
D128
D136

Definition at line 14 of file VDPAccessSlots.hh.

Function Documentation

getAccessSlot()

EmuTime openmsx::VDPAccessSlots::getAccessSlot	(	EmuTime::param	frame,
		EmuTime::param	time,
		Delta	delta,
		const VDP &	vdp
	)

Return the time of the next available access slot that is at least 'delta' cycles later than 'time'.

The start of the current 'frame' is needed for reference.

Definition at line 226 of file VDPAccessSlots.cc.

References openmsx::Clock< TICKS_PER_SECOND >::duration(), openmsx::Clock< FREQ_NUM, FREQ_DENOM >::getTicksTill_fast(), TICKS, and to_underlying().

Referenced by openmsx::VDP::getAccessSlot().

getCalculator()

Calculator openmsx::VDPAccessSlots::getCalculator	(	EmuTime::param	frame,
		EmuTime::param	time,
		EmuTime::param	limit,
		const VDP &	vdp
	)

When many calls to getAccessSlot() are needed, it's more efficient to instead use this function.

Definition at line 236 of file VDPAccessSlots.cc.

Referenced by openmsx::VDP::getAccessSlotCalculator().

Variable Documentation

TICKS

constexpr int openmsx::VDPAccessSlots::TICKS = VDP::TICKS_PER_LINE

inlineconstexpr

Definition at line 12 of file VDPAccessSlots.hh.

Referenced by openmsx::VDPAccessSlots::Calculator::Calculator(), openmsx::VDPAccessSlots::CycleTable::CycleTable(), getAccessSlot(), and openmsx::VDPAccessSlots::Calculator::next().