SNES HDMA (Horizontal-blanking DMA) More...

#include <snes/types.h>

Macros
#define	HDMA_CHANNEL_0 0
	HDMA channel 0 (conflicts with common DMA usage)

#define	HDMA_CHANNEL_1 1
	HDMA channel 1.

#define	HDMA_CHANNEL_2 2
	HDMA channel 2.

#define	HDMA_CHANNEL_3 3
	HDMA channel 3.

#define	HDMA_CHANNEL_4 4
	HDMA channel 4.

#define	HDMA_CHANNEL_5 5
	HDMA channel 5.

#define	HDMA_CHANNEL_6 6
	HDMA channel 6 (recommended for HDMA)

#define	HDMA_CHANNEL_7 7
	HDMA channel 7 (recommended for HDMA)

#define	HDMA_DEST_BG1HOFS 0x0D
	Destination: BG1 H scroll ($210D)

#define	HDMA_DEST_BG1VOFS 0x0E
	Destination: BG1 V scroll ($210E)

#define	HDMA_DEST_BG2HOFS 0x0F
	Destination: BG2 H scroll ($210F)

#define	HDMA_DEST_BG2VOFS 0x10
	Destination: BG2 V scroll ($2110)

#define	HDMA_DEST_BG3HOFS 0x11
	Destination: BG3 H scroll ($2111)

#define	HDMA_DEST_BG3VOFS 0x12
	Destination: BG3 V scroll ($2112)

#define	HDMA_DEST_CGADD 0x21
	Destination: CGRAM address ($2121) - for palette effects.

#define	HDMA_DEST_CGDATA 0x22
	Destination: CGRAM data ($2122) - for color effects.

#define	HDMA_DEST_COLDATA 0x32
	Destination: Fixed color ($2132)

#define	HDMA_DEST_INIDISP 0x00
	Destination: INIDISP brightness ($2100)

#define	HDMA_DEST_M7A 0x1B
	Destination: Mode 7 matrix A ($211B)

#define	HDMA_DEST_WH0 0x26
	Destination: Window 1 left ($2126)

#define	HDMA_DEST_WH1 0x27
	Destination: Window 1 right ($2127)

#define	HDMA_INDIRECT 0x40
	Indirect HDMA flag (OR with mode)

#define	HDMA_MODE_1REG 0x00
	HDMA mode: 1 register, 1 byte.

#define	HDMA_MODE_1REG_2X 0x02
	HDMA mode: 1 register, 2 bytes written twice.

#define	HDMA_MODE_2REG 0x01
	HDMA mode: 2 registers, 2 bytes (low/high)

#define	HDMA_MODE_2REG_2X 0x03
	HDMA mode: 2 registers, 4 bytes (2 to each)

#define	HDMA_MODE_4REG 0x04
	HDMA mode: 4 registers, 4 bytes.

Functions
void	hdmaBrightnessGradient (u8 channel, u8 topBrightness, u8 bottomBrightness)
	Create a vertical brightness gradient.

void	hdmaBrightnessGradientStop (u8 channel)
	Stop brightness gradient and restore full brightness.

void	hdmaColorGradient (u8 channel, u8 colorIndex, u16 topColor, u16 bottomColor)
	Create a per-scanline CGRAM color gradient.

void	hdmaColorGradientStop (u8 channel)
	Stop color gradient effect.

void	hdmaDisable (u8 channelMask)
	Disable HDMA channel(s)

void	hdmaDisableAll (void)
	Disable all HDMA channels.

void	hdmaEnable (u8 channelMask)
	Enable HDMA channel(s)

u8	hdmaGetEnabled (void)
	Get currently enabled HDMA channels.

void	hdmaGradient (u8 channel, const void *colorTable)
	Set up a fixed color gradient effect.

void	hdmaIrisWipe (u8 channel, u8 layers, u8 centerX, u8 centerY, u8 radius)
	Create a circular window mask (iris/spotlight effect)

void	hdmaIrisWipeStop (u8 channel)
	Stop iris wipe effect and restore window registers.

void	hdmaParallax (u8 channel, u8 bg, const void *scrollTable)
	Set up a background parallax scroll effect.

void	hdmaSetTable (u8 channel, const void *table)
	Update HDMA table pointer (for dynamic effects)

void	hdmaSetup (u8 channel, u8 mode, u8 destReg, const void *table)
	Set up an HDMA channel.

void	hdmaSetupBank (u8 channel, u8 mode, u8 destReg, const void *table, u8 bank)
	Set up an HDMA channel with explicit source bank byte.

void	hdmaWaterRipple (u8 channel, u8 bg, u8 amplitude, u8 speed)
	Create a water ripple distortion effect.

void	hdmaWaveH (u8 channel, u8 bg, u8 amplitude, u8 frequency)
	Set up horizontal wave effect (water reflection)

void	hdmaWaveInit (void)
	Initialize HDMA wave effect system.

void	hdmaWaveSetSpeed (u8 speed)
	Set wave speed.

void	hdmaWaveStop (void)
	Stop wave effect and disable HDMA channel.

void	hdmaWaveUpdate (void)
	Update wave animation.

void	hdmaWindowShape (u8 channel, const void *windowTable)
	Set up window position HDMA for shape effects.

Detailed Description

SNES HDMA (Horizontal-blanking DMA)

HDMA transfers data to PPU registers once per scanline during HBlank, enabling effects like color gradients, parallax scrolling, and wave distortion that change across the screen.

How HDMA Works

HDMA uses a table in memory that specifies:

How many scanlines to apply a value
The value(s) to write to the destination register

Each entry in the table is:

1 byte: Line count (bit 7 = repeat mode, bits 0-6 = count)
N bytes: Data to write (1-4 bytes depending on transfer mode)

Table Format

Non-repeat mode (bit 7 = 0): Write data ONCE, then skip N-1 scanlines

.db 32       ; Write data once, hold for 32 scanlines
.db $1F, $00 ; Data (2 bytes for transfer mode 1)
.db 16       ; Write data once, hold for 16 scanlines
.db $1F, $08 ; Data
.db 0        ; End of table

Use for registers that hold their value (COLDATA, CGADD). Efficient: 1 data set per group, regardless of line count.

Repeat mode (bit 7 = 1): Write same data EVERY scanline for N lines

.db $82      ; Write data every scanline for 2 lines ($80 | 2)
.db $1F, $00 ; Data written on each of the 2 scanlines
.db $85      ; Write data every scanline for 5 lines
.db $1F, $08 ; Data
.db 0        ; End of table

REQUIRED for scroll registers (BG1HOFS, etc.) and other write-twice/ latched registers that need re-writing every scanline.

Usage Example

// Define HDMA table in ROM
const u8 gradient_table[] = {
    32, 0x00,    // 32 lines: color 0
    32, 0x08,    // 32 lines: color 8
    32, 0x10,    // 32 lines: color 16
    0            // End
};
 
// Set up HDMA channel 6 to write to fixed color register
hdmaSetup(HDMA_CHANNEL_6, HDMA_MODE_1REG, 0x32, gradient_table);
hdmaEnable(HDMA_CHANNEL_6);
 
// In main loop, HDMA runs automatically each frame

Warning: Do NOT use HDMA_CHANNEL_7 — the NMI handler uses DMA channel 7 for OAM transfers every frame, which destroys any HDMA setup on that channel. Safe HDMA channels: 1-6 (channel 0 is used by dmaCopyVram).

Note: HDMA tables must be in ROM or bank $7E RAM.

Bank Byte Limitation

hdmaSetup() hardcodes bank $00 for ROM addresses (>= $8000). If the linker places a SUPERFREE table in bank $01+, HDMA will read wrong data. Use hdmaSetupBank() with an explicit bank byte for ROM tables, or use RAM-based tables (always bank $00) for dynamic effects.

IMPORTANT: Scroll Registers Require Repeat Mode

BG scroll registers (BG1HOFS, BG1VOFS, etc.) are latched registers that require being written EVERY scanline to maintain their value. Use REPEAT mode (bit 7 = 1) in the HDMA line count for these registers.

Non-repeat mode (bit 7 = 0) writes data only ONCE per group, so the scroll value is lost on subsequent scanlines — causing visible glitches.

// WRONG - Non-repeat writes once then skips, scroll value lost:
.db 32, $20, $00    ; Writes on line 1 only, lines 2-32 get stale value
 
// CORRECT - Repeat writes every scanline, scroll value maintained:
.db $A0, $20, $00   ; $A0 = $80 | 32 = write every scanline for 32 lines

Summary:

COLDATA ($2132), CGADD/CGDATA: non-repeat OK (registers hold value)
BG scroll, window, Mode 7 matrix: MUST use repeat mode

Author: OpenSNES Team

Copyright: MIT License

Macro Definition Documentation

◆ HDMA_CHANNEL_0

#define HDMA_CHANNEL_0 0

HDMA channel 0 (conflicts with common DMA usage)

◆ HDMA_CHANNEL_1

#define HDMA_CHANNEL_1 1

HDMA channel 1.

◆ HDMA_CHANNEL_2

#define HDMA_CHANNEL_2 2

HDMA channel 2.

◆ HDMA_CHANNEL_3

#define HDMA_CHANNEL_3 3

HDMA channel 3.

◆ HDMA_CHANNEL_4

#define HDMA_CHANNEL_4 4

HDMA channel 4.

◆ HDMA_CHANNEL_5

#define HDMA_CHANNEL_5 5

HDMA channel 5.

◆ HDMA_CHANNEL_6

#define HDMA_CHANNEL_6 6

HDMA channel 6 (recommended for HDMA)

◆ HDMA_CHANNEL_7

#define HDMA_CHANNEL_7 7

HDMA channel 7 (recommended for HDMA)

◆ HDMA_DEST_BG1HOFS

#define HDMA_DEST_BG1HOFS 0x0D

Destination: BG1 H scroll ($210D)

◆ HDMA_DEST_BG1VOFS

#define HDMA_DEST_BG1VOFS 0x0E

Destination: BG1 V scroll ($210E)

◆ HDMA_DEST_BG2HOFS

#define HDMA_DEST_BG2HOFS 0x0F

Destination: BG2 H scroll ($210F)

◆ HDMA_DEST_BG2VOFS

#define HDMA_DEST_BG2VOFS 0x10

Destination: BG2 V scroll ($2110)

◆ HDMA_DEST_BG3HOFS

#define HDMA_DEST_BG3HOFS 0x11

Destination: BG3 H scroll ($2111)

◆ HDMA_DEST_BG3VOFS

#define HDMA_DEST_BG3VOFS 0x12

Destination: BG3 V scroll ($2112)

◆ HDMA_DEST_CGADD

#define HDMA_DEST_CGADD 0x21

Destination: CGRAM address ($2121) - for palette effects.

◆ HDMA_DEST_CGDATA

#define HDMA_DEST_CGDATA 0x22

Destination: CGRAM data ($2122) - for color effects.

◆ HDMA_DEST_COLDATA

#define HDMA_DEST_COLDATA 0x32

Destination: Fixed color ($2132)

◆ HDMA_DEST_INIDISP

#define HDMA_DEST_INIDISP 0x00

Destination: INIDISP brightness ($2100)

◆ HDMA_DEST_M7A

#define HDMA_DEST_M7A 0x1B

Destination: Mode 7 matrix A ($211B)

◆ HDMA_DEST_WH0

#define HDMA_DEST_WH0 0x26

Destination: Window 1 left ($2126)

◆ HDMA_DEST_WH1

#define HDMA_DEST_WH1 0x27

Destination: Window 1 right ($2127)

◆ HDMA_INDIRECT

#define HDMA_INDIRECT 0x40

Indirect HDMA flag (OR with mode)

When set, table contains pointers to data instead of data itself. Useful for large tables or dynamic data.

◆ HDMA_MODE_1REG

#define HDMA_MODE_1REG 0x00

HDMA mode: 1 register, 1 byte.

Writes 1 byte to destination register each scanline. Table entry: 1 byte line count + 1 byte data

◆ HDMA_MODE_1REG_2X

#define HDMA_MODE_1REG_2X 0x02

HDMA mode: 1 register, 2 bytes written twice.

Writes 2 bytes to same register (for double-write registers). Table entry: 1 byte line count + 2 bytes data

◆ HDMA_MODE_2REG

#define HDMA_MODE_2REG 0x01

HDMA mode: 2 registers, 2 bytes (low/high)

Writes 2 bytes to consecutive registers (e.g., scroll low/high). Table entry: 1 byte line count + 2 bytes data

◆ HDMA_MODE_2REG_2X

#define HDMA_MODE_2REG_2X 0x03

HDMA mode: 2 registers, 4 bytes (2 to each)

Writes 4 bytes: 2 to dest, 2 to dest+1. Table entry: 1 byte line count + 4 bytes data

◆ HDMA_MODE_4REG

#define HDMA_MODE_4REG 0x04

HDMA mode: 4 registers, 4 bytes.

Writes 4 bytes to 4 consecutive registers. Table entry: 1 byte line count + 4 bytes data

Function Documentation

◆ hdmaBrightnessGradient()

void hdmaBrightnessGradient	(	u8	channel,
		u8	topBrightness,
		u8	bottomBrightness
	)

Create a vertical brightness gradient.

Smoothly fades screen brightness from top to bottom using HDMA on the INIDISP register ($2100). Useful for:

Fade-to-black at screen bottom
Spotlight / vignette effects
Underwater depth dimming

Parameters

channel	HDMA channel (6 or 7 recommended)
topBrightness	Brightness at top of screen (0-15, 15=full)
bottomBrightness	Brightness at bottom of screen (0-15)

hdmaBrightnessGradient(HDMA_CHANNEL_7, 15, 0); // Fade to black

hdmaBrightnessGradient

void hdmaBrightnessGradient(u8 channel, u8 topBrightness, u8 bottomBrightness)

Create a vertical brightness gradient.

HDMA_CHANNEL_7

#define HDMA_CHANNEL_7

HDMA channel 7 (recommended for HDMA)

Definition hdma.h:122

◆ hdmaBrightnessGradientStop()

void hdmaBrightnessGradientStop ( u8 channel )

Stop brightness gradient and restore full brightness.

Parameters

channel The channel used for the gradient

◆ hdmaColorGradient()

void hdmaColorGradient	(	u8	channel,
		u8	colorIndex,
		u16	topColor,
		u16	bottomColor
	)

Create a per-scanline CGRAM color gradient.

Smoothly interpolates a palette color from one value to another across the screen. Uses HDMA to rewrite a CGRAM entry per scanline. Useful for:

Sky color gradients (blue to orange sunset)
Water depth color shifts
Background atmosphere effects

Parameters

channel	HDMA channel (6 or 7 recommended)
colorIndex	CGRAM color index to modify (0-255)
topColor	15-bit SNES color at top of screen (use RGB() macro)
bottomColor	15-bit SNES color at bottom of screen

// Blue sky fading to orange at horizon
hdmaColorGradient(HDMA_CHANNEL_6, 0,
                  RGB(4, 8, 28),    // Deep blue
                  RGB(28, 16, 4));   // Orange

◆ hdmaColorGradientStop()

void hdmaColorGradientStop ( u8 channel )

Stop color gradient effect.

Parameters

channel The channel used for the gradient

◆ hdmaDisable()

void hdmaDisable ( u8 channelMask )

Disable HDMA channel(s)

Disables the specified HDMA channel(s).

Parameters

channelMask Bitmask of channels to disable

◆ hdmaDisableAll()

void hdmaDisableAll ( void )

Disable all HDMA channels.

Convenience function to stop all HDMA activity.

◆ hdmaEnable()

void hdmaEnable ( u8 channelMask )

Enable HDMA channel(s)

Enables the specified HDMA channel(s). HDMA will start on the next frame.

Parameters

channelMask Bitmask of channels to enable (1 << channel)

hdmaEnable(1 << HDMA_CHANNEL_6); // Enable channel 6

hdmaEnable((1 << HDMA_CHANNEL_6) | (1 << HDMA_CHANNEL_7)); // Enable 6 and 7

◆ hdmaGetEnabled()

u8 hdmaGetEnabled ( void )

Get currently enabled HDMA channels.

Returns: Bitmask of enabled channels

◆ hdmaGradient()

void hdmaGradient	(	u8	channel,
		const void *	colorTable
	)

Set up a fixed color gradient effect.

Creates a vertical color gradient by changing the fixed color register per scanline. Useful for sky gradients, underwater effects, etc.

Parameters

channel	HDMA channel to use
colorTable	HDMA table with COLDATA values

Note: Table format: line count + 1 byte (COLDATA value) per entry; COLDATA format: bits 7-5 = color select (RGB), bits 4-0 = intensity

◆ hdmaIrisWipe()

void hdmaIrisWipe	(	u8	channel,
		u8	layers,
		u8	centerX,
		u8	centerY,
		u8	radius
	)

Create a circular window mask (iris/spotlight effect)

Uses HDMA to drive window registers (WH0/WH1) per scanline, approximating a circle. Configures all window registers automatically. Useful for:

Scene transitions (iris in/out)
Spotlight effects
Circular vignette

Parameters

channel	HDMA channel (6 or 7 recommended)
layers	Layer bitmask to apply window masking (TM_BG1, TM_BG2, etc.)
centerX	Horizontal center of circle (0-255)
centerY	Vertical center of circle (0-223)
radius	Circle radius in pixels (0-128)

Note: Call again with a different radius to animate the wipe.

// Iris wipe on BG1, centered on screen
hdmaIrisWipe(HDMA_CHANNEL_6, TM_BG1, 128, 112, 80);
 
// Animate iris opening
for (r = 0; r < 128; r += 2) {
    hdmaIrisWipe(HDMA_CHANNEL_6, TM_BG1, 128, 112, r);
    WaitForVBlank();
}

◆ hdmaIrisWipeStop()

void hdmaIrisWipeStop ( u8 channel )

Stop iris wipe effect and restore window registers.

Disables the HDMA channel and clears all window masking registers (W12SEL, W34SEL, WOBJSEL, TMW) to restore normal display.

Parameters

channel The channel used for the iris wipe

◆ hdmaParallax()

void hdmaParallax	(	u8	channel,
		u8	bg,
		const void *	scrollTable
	)

Set up a background parallax scroll effect.

Creates horizontal parallax scrolling where each section of the screen scrolls at a different speed based on the scroll table.

Parameters

channel	HDMA channel to use
bg	Background layer (0=BG1, 1=BG2, 2=BG3)
scrollTable	HDMA table with scroll values

Note: Table format: line count + 2 bytes (scroll low/high) per entry

◆ hdmaSetTable()

void hdmaSetTable	(	u8	channel,
		const void *	table
	)

Update HDMA table pointer (for dynamic effects)

Changes the table pointer for an already-configured channel. Takes effect on the next frame.

Parameters

channel	HDMA channel (0-7)
table	New table pointer

◆ hdmaSetup()

void hdmaSetup	(	u8	channel,
		u8	mode,
		u8	destReg,
		const void *	table
	)

Set up an HDMA channel.

Configures an HDMA channel with the specified parameters. The channel is NOT enabled automatically - call hdmaEnable() to start it.

Parameters

channel	HDMA channel (0-7, use HDMA_CHANNEL_6 or _7)
mode	Transfer mode (HDMA_MODE_*)
destReg	Destination B-bus register (low byte of $21xx address)
table	Pointer to HDMA table in ROM or RAM

hdmaSetup(HDMA_CHANNEL_6, HDMA_MODE_1REG, HDMA_DEST_COLDATA, my_table);

hdmaEnable(HDMA_CHANNEL_6);

HDMA_DEST_COLDATA

#define HDMA_DEST_COLDATA

Destination: Fixed color ($2132)

Definition hdma.h:211

◆ hdmaSetupBank()

void hdmaSetupBank	(	u8	channel,
		u8	mode,
		u8	destReg,
		const void *	table,
		u8	bank
	)

Set up an HDMA channel with explicit source bank byte.

Same as hdmaSetup() but allows specifying the ROM bank for HDMA tables in banks other than $00. Use this when your HDMA table is in a SUPERFREE section that may be placed in bank $01+ by the linker.

Parameters

channel	HDMA channel (0-7, use HDMA_CHANNEL_6 or _7)
mode	Transfer mode (HDMA_MODE_*)
destReg	Destination B-bus register (low byte of $21xx address)
table	Pointer to HDMA table in ROM or RAM
bank	Source bank byte ($00-$3F for LoROM)

◆ hdmaWaterRipple()

void hdmaWaterRipple	(	u8	channel,
		u8	bg,
		u8	amplitude,
		u8	speed
	)

Create a water ripple distortion effect.

Similar to hdmaWaveH but with amplitude that increases from top to bottom, simulating underwater refraction or heat haze. Uses the wave system's double-buffered tables internally.

Parameters

channel	HDMA channel (6 or 7 recommended)
bg	Background layer (0=BG1, 1=BG2, 2=BG3)
amplitude	Maximum ripple amplitude at bottom of screen (1-60 pixels, clamped)
speed	Animation speed (1=slow, 4=fast)

Note: Amplitude is clamped to 60 to prevent s16 overflow in sine computation.; Cannot be used simultaneously with hdmaWaveH (shared buffers).; Call hdmaWaveUpdate() each frame to animate.; Call hdmaWaveStop() to stop the effect.

hdmaWaterRipple(HDMA_CHANNEL_6, 0, 8, 2);
 
while (1) {
    WaitForVBlank();
    hdmaWaveUpdate();  // Animate ripple
}

◆ hdmaWaveH()

void hdmaWaveH	(	u8	channel,
		u8	bg,
		u8	amplitude,
		u8	frequency
	)

Set up horizontal wave effect (water reflection)

Creates a wavy horizontal distortion, commonly used for:

Water reflections
Heat shimmer
Dream/flashback sequences

Parameters

channel	HDMA channel to use (6 or 7 recommended)
bg	Background layer to affect (0=BG1, 1=BG2, 2=BG3)
amplitude	Wave amplitude in pixels (1-60, clamped internally)
frequency	Wave frequency (1-16, higher = tighter waves). Period = 256/frequency scanlines.

hdmaWaveInit();
hdmaWaveH(HDMA_CHANNEL_6, 0, 4, 4);  // Gentle water reflection on BG1
hdmaEnable(1 << HDMA_CHANNEL_6);
 
while (1) {
    WaitForVBlank();
    hdmaWaveUpdate();  // Animate the wave
}

◆ hdmaWaveInit()

void hdmaWaveInit ( void )

Initialize HDMA wave effect system.

Must be called once before using wave effects. Allocates internal buffers and sets up the wave state.

◆ hdmaWaveSetSpeed()

void hdmaWaveSetSpeed ( u8 speed )

Set wave speed.

Parameters

speed Animation speed (1=slow, 4=fast, default=2)

◆ hdmaWaveStop()

void hdmaWaveStop ( void )

Stop wave effect and disable HDMA channel.

Disables the wave effect and frees the HDMA channel.

◆ hdmaWaveUpdate()

void hdmaWaveUpdate ( void )

Update wave animation.

Call this once per frame (after WaitForVBlank) to animate the wave effect. Updates the HDMA table with new wave values.

Note: Only needed if wave effects are active

◆ hdmaWindowShape()

void hdmaWindowShape	(	u8	channel,
		const void *	windowTable
	)

Set up window position HDMA for shape effects.

Uses HDMA to change window boundaries per scanline, creating shapes like circles, triangles, or custom masks.

Parameters

channel	HDMA channel to use
windowTable	HDMA table with left/right pairs

Note: Table format: line count + 2 bytes (left, right) per entry; Uses mode 2REG to write both WH0 and WH1

Macros

Functions

Detailed Description

How HDMA Works

Table Format

Usage Example

Bank Byte Limitation

IMPORTANT: Scroll Registers Require Repeat Mode

Macro Definition Documentation

◆ HDMA_CHANNEL_0

◆ HDMA_CHANNEL_1

◆ HDMA_CHANNEL_2

◆ HDMA_CHANNEL_3

◆ HDMA_CHANNEL_4

◆ HDMA_CHANNEL_5

◆ HDMA_CHANNEL_6

◆ HDMA_CHANNEL_7

◆ HDMA_DEST_BG1HOFS

◆ HDMA_DEST_BG1VOFS

◆ HDMA_DEST_BG2HOFS

◆ HDMA_DEST_BG2VOFS

◆ HDMA_DEST_BG3HOFS

◆ HDMA_DEST_BG3VOFS

◆ HDMA_DEST_CGADD

◆ HDMA_DEST_CGDATA

◆ HDMA_DEST_COLDATA

◆ HDMA_DEST_INIDISP

◆ HDMA_DEST_M7A

◆ HDMA_DEST_WH0

◆ HDMA_DEST_WH1

◆ HDMA_INDIRECT

◆ HDMA_MODE_1REG

◆ HDMA_MODE_1REG_2X

◆ HDMA_MODE_2REG

◆ HDMA_MODE_2REG_2X

◆ HDMA_MODE_4REG

Function Documentation

◆ hdmaBrightnessGradient()

◆ hdmaBrightnessGradientStop()

◆ hdmaColorGradient()

◆ hdmaColorGradientStop()

◆ hdmaDisable()

◆ hdmaDisableAll()

◆ hdmaEnable()

◆ hdmaGetEnabled()

◆ hdmaGradient()

◆ hdmaIrisWipe()

◆ hdmaIrisWipeStop()

◆ hdmaParallax()

◆ hdmaSetTable()

◆ hdmaSetup()

◆ hdmaSetupBank()

◆ hdmaWaterRipple()

◆ hdmaWaveH()

◆ hdmaWaveInit()

◆ hdmaWaveSetSpeed()

◆ hdmaWaveStop()

◆ hdmaWaveUpdate()

◆ hdmaWindowShape()