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	Delta : int {   DELTA_0 = 0 * TICKS , DELTA_1 = 1 * TICKS , DELTA_16 = 2 * TICKS , DELTA_24 = 3 * TICKS ,   DELTA_28 = 4 * TICKS , DELTA_32 = 5 * TICKS , DELTA_40 = 6 * TICKS , DELTA_48 = 7 * TICKS ,   DELTA_64 = 8 * TICKS , DELTA_72 = 9 * TICKS , DELTA_88 = 10 * TICKS , DELTA_104 = 11 * TICKS ,   DELTA_120 = 12 * TICKS , DELTA_128 = 13 * TICKS , DELTA_136 = 14 * TICKS , NUM_DELTAS = 15 }

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 openmsx::VDPAccessSlots::Delta : int

Enumerator
DELTA_0
DELTA_1
DELTA_16
DELTA_24
DELTA_28
DELTA_32
DELTA_40
DELTA_48
DELTA_64
DELTA_72
DELTA_88
DELTA_104
DELTA_120
DELTA_128
DELTA_136
NUM_DELTAS

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 244 of file VDPAccessSlots.cc.

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

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 254 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().