openmsx::CharacterConverter Class Reference

Utility class for converting VRAM contents to host pixels. More...

#include <CharacterConverter.hh>

Public Types
using	Pixel = uint32_t

Public Member Functions
	CharacterConverter (VDP &vdp, std::span< const Pixel, 16 > palFg, std::span< const Pixel, 16 > palBg)
	Create a new bitmap scanline converter.
void	convertLine (std::span< Pixel > buf, int line) const
	Convert a line of V9938 VRAM to 256 or 512 host pixels.
void	setDisplayMode (DisplayMode mode)
	Select the display mode to use for scanline conversion.

Detailed Description

Utility class for converting VRAM contents to host pixels.

Definition at line 18 of file CharacterConverter.hh.

Member Typedef Documentation

Pixel

using openmsx::CharacterConverter::Pixel = uint32_t

Definition at line 21 of file CharacterConverter.hh.

Constructor & Destructor Documentation

CharacterConverter()

openmsx::CharacterConverter::CharacterConverter	(	VDP &	vdp,
		std::span< const Pixel, 16 >	palFg,
		std::span< const Pixel, 16 >	palBg
	)

Create a new bitmap scanline converter.

Parameters

vdp	The VDP of which the VRAM will be converted.
palFg	Pointer to 16-entries array that specifies VDP foreground color index to host pixel mapping. This is kept as a pointer, so any changes to the palette are immediately picked up by convertLine.
palBg	Pointer to 16-entries array that specifies VDP background color index to host pixel mapping. This is kept as a pointer, so any changes to the palette are immediately picked up by convertLine.

Definition at line 29 of file CharacterConverter.cc.

Member Function Documentation

convertLine()

void openmsx::CharacterConverter::convertLine	(	std::span< Pixel >	buf,
		int	line
	)		const

Convert a line of V9938 VRAM to 256 or 512 host pixels.

Call this method in non-planar display modes (Graphic4 and Graphic5).

Parameters

buf	Buffer where host pixels will be written to. Depending on the screen mode, the buffer must contain at least 256 or 512 pixels, but more is allowed (the extra pixels aren't touched).
line	Display line number [0..255].

Definition at line 41 of file CharacterConverter.cc.

References openmsx::DisplayMode::GRAPHIC1, openmsx::DisplayMode::GRAPHIC2, openmsx::DisplayMode::GRAPHIC3, openmsx::VDP::isMSX1VDP(), openmsx::DisplayMode::MULTICOLOR, openmsx::DisplayMode::MULTIQ, openmsx::DisplayMode::TEXT1, openmsx::DisplayMode::TEXT1Q, and openmsx::DisplayMode::TEXT2.

Referenced by openmsx::SDLRasterizer::drawDisplay().

setDisplayMode()

void openmsx::CharacterConverter::setDisplayMode

(

DisplayMode

mode

)

Select the display mode to use for scanline conversion.

Parameters

mode	The new display mode.

Definition at line 35 of file CharacterConverter.cc.

References openmsx::DisplayMode::getBase().

Referenced by openmsx::SDLRasterizer::setDisplayMode().

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The documentation for this class was generated from the following files:

• CharacterConverter.hh
• CharacterConverter.cc