Inheritance diagram for OpenGL::OpenGLGraphicsManager:

Classes
struct	VideoState

Public Member Functions
bool	hasFeature (OSystem::Feature f) const override

void	setFeatureState (OSystem::Feature f, bool enable) override

bool	getFeatureState (OSystem::Feature f) const override

const OSystem::GraphicsMode *	getSupportedGraphicsModes () const override

int	getDefaultGraphicsMode () const override

bool	setGraphicsMode (int mode, uint flags=OSystem::kGfxModeNoFlags) override

int	getGraphicsMode () const override

const OSystem::GraphicsMode *	getSupportedStretchModes () const override

int	getDefaultStretchMode () const override

bool	setStretchMode (int mode) override

int	getStretchMode () const override

bool	setShader (const Common::Path &fileNode) override

void	beginGFXTransaction () override

OSystem::TransactionError	endGFXTransaction () override

int	getScreenChangeID () const override

void	initSize (uint width, uint height, const Graphics::PixelFormat *format) override

int16	getWidth () const override

int16	getHeight () const override

void	copyRectToScreen (const void *buf, int pitch, int x, int y, int w, int h) override

void	fillScreen (uint32 col) override

void	fillScreen (const Common::Rect &r, uint32 col) override

void	updateScreen () override

Graphics::Surface *	lockScreen () override

void	unlockScreen () override

void	setFocusRectangle (const Common::Rect &rect) override

void	clearFocusRectangle () override

int16	getOverlayWidth () const override

int16	getOverlayHeight () const override

Graphics::PixelFormat	getOverlayFormat () const override

void	copyRectToOverlay (const void *buf, int pitch, int x, int y, int w, int h) override

void	clearOverlay () override

void	grabOverlay (Graphics::Surface &surface) const override

void	setMouseCursor (const void buf, uint w, uint h, int hotspotX, int hotspotY, uint32 keycolor, bool dontScale, const Graphics::PixelFormat format, const byte *mask) override

void	setCursorPalette (const byte *colors, uint start, uint num) override

void	displayMessageOnOSD (const Common::U32String &msg) override

void	displayActivityIconOnOSD (const Graphics::Surface *icon) override

void	setPalette (const byte *colors, uint start, uint num) override

void	grabPalette (byte *colors, uint start, uint num) const override

Public Member Functions inherited from WindowedGraphicsManager
void	showOverlay (bool inGUI) override

void	hideOverlay () override

bool	isOverlayVisible () const override

void	setShakePos (int shakeXOffset, int shakeYOffset) override

int	getWindowWidth () const

int	getWindowHeight () const

Public Member Functions inherited from GraphicsManager
virtual uint	getDefaultScaler () const

virtual uint	getDefaultScaleFactor () const

virtual bool	setScaler (uint mode, int factor)

virtual uint	getScaler () const

virtual uint	getScaleFactor () const

virtual void	initSizeHint (const Graphics::ModeList &modes)

virtual float	getHiDPIScreenFactor () const

virtual void	saveScreenshot ()

virtual bool	lockMouse (bool lock)

Protected Types
enum	TransactionMode { kTransactionNone = 0, kTransactionActive = 1, kTransactionRollback = 2 }

Protected Member Functions
void	renderCursor ()

bool	isGLESContext () const

void	notifyContextCreate (ContextType type, Framebuffer *target, const Graphics::PixelFormat &defaultFormat, const Graphics::PixelFormat &defaultFormatAlpha)

void	notifyContextDestroy ()

Surface *	createSurface (const Graphics::PixelFormat &format, bool wantAlpha=false, bool wantScaler=false, bool wantMask=false)

TransactionMode	getTransactionMode () const

virtual bool	loadVideoMode (uint requestedWidth, uint requestedHeight, const Graphics::PixelFormat &format)=0

bool	loadShader (const Common::Path &fileName)

virtual void	refreshScreen ()=0

bool	saveScreenshot (const Common::Path &filename) const

bool	getGLPixelFormat (const Graphics::PixelFormat &pixelFormat, GLenum &glIntFormat, GLenum &glFormat, GLenum &glType) const

bool	gameNeedsAspectRatioCorrection () const override

int	getGameRenderScale () const override

void	recalculateDisplayAreas () override

void	handleResizeImpl (const int width, const int height) override

void	updateLinearFiltering ()

Pipeline *	getPipeline () const

void	updateCursorPalette ()

void	recalculateCursorScaling ()

virtual const Graphics::Font *	getFontOSD () const

Protected Member Functions inherited from WindowedGraphicsManager
Common::Point	convertVirtualToWindow (const int x, const int y) const

Common::Point	convertWindowToVirtual (int x, int y) const

frac_t	getDesiredGameAspectRatio () const

void	handleResize (const int width, const int height)

virtual void	setSystemMousePosition (const int x, const int y)=0

virtual void	notifyActiveAreaChanged ()

bool	showMouse (bool visible) override

void	warpMouse (int x, int y) override

void	setMousePosition (int x, int y)

Protected Attributes
VideoState	_currentState

VideoState	_oldState

Graphics::PixelFormat	_defaultFormat

Graphics::PixelFormat	_defaultFormatAlpha

Framebuffer *	_targetBuffer

Surface *	_gameScreen

byte	_gamePalette [3 *256]

Surface *	_overlay

Surface *	_cursor

Surface *	_cursorMask

int	_cursorHotspotX

int	_cursorHotspotY

int	_cursorHotspotXScaled

int	_cursorHotspotYScaled

float	_cursorWidthScaled

float	_cursorHeightScaled

uint32	_cursorKeyColor

bool	_cursorUseKey

bool	_cursorDontScale

bool	_cursorPaletteEnabled

byte	_cursorPalette [3 *256]

Protected Attributes inherited from WindowedGraphicsManager
int	_windowWidth

int	_windowHeight

int	_screenAlign

bool	_overlayVisible

bool	_overlayInGUI

int	_gameScreenShakeXOffset

int	_gameScreenShakeYOffset

Common::Rect	_gameDrawRect

Common::Rect	_overlayDrawRect

DisplayArea	_activeArea

bool	_forceRedraw

bool	_cursorVisible

bool	_cursorNeedsRedraw

bool	_cursorLastInActiveArea

int	_cursorX

int	_cursorY

Member Function Documentation

◆ setPalette()

void OpenGL::OpenGLGraphicsManager::setPalette	(	const byte *	colors,
		uint	start,
		uint	num
	)

overridevirtual

Replace the specified range of the palette with new colors. The palette entries from 'start' till (start+num-1) will be replaced - so a full palette update is accomplished via start=0, num=256.

The palette data is specified in interleaved RGB format. That is, the first byte of the memory block 'colors' points at is the red component of the first new color; the second byte the green component of the first new color; the third byte the blue component, the last byte to the alpha (transparency) value. Then the second color starts, and so on. So memory looks like this: R1-G1-B1-R2-G2-B2-R3-...

Parameters

colors	the new palette data, in interleaved RGB format
start	the first palette entry to be updated
num	the number of palette entries to be updated

Note: It is an error if start+num exceeds 256, behavior is undefined in that case (the backend may ignore it silently or assert).; It is an error if this function gets called when the pixel format in use (the return value of getScreenFormat) has more than one byte per pixel.

See also: getScreenFormat

Implements GraphicsManager.

◆ grabPalette()

void OpenGL::OpenGLGraphicsManager::grabPalette	(	byte *	colors,
		uint	start,
		uint	num
	)		const

overridevirtual

Grabs a specified part of the currently active palette. The format is the same as for setPalette.

This should return exactly the same RGB data as was setup via previous setPalette calls.

For example, for every valid value of start and num of the following code:

byte origPal[num*3]; // Setup origPal's data however you like g_system->setPalette(origPal, start, num); byte obtainedPal[num*3]; g_system->grabPalette(obtainedPal, start, num);

the following should be true:

memcmp(origPal, obtainedPal, num*3) == 0

See also: setPalette

Parameters

colors	the palette data, in interleaved RGB format
start	the first platte entry to be read
num	the number of palette entries to be read

Note: It is an error if this function gets called when the pixel format in use (the return value of getScreenFormat) has more than one byte per pixel.

See also: getScreenFormat

Implements GraphicsManager.

◆ isGLESContext()

bool OpenGL::OpenGLGraphicsManager::isGLESContext ( ) const

inlineprotected

Whether a GLES or GLES2 context is active.

◆ notifyContextCreate()

void OpenGL::OpenGLGraphicsManager::notifyContextCreate	(	ContextType	type,
		Framebuffer *	target,
		const Graphics::PixelFormat &	defaultFormat,
		const Graphics::PixelFormat &	defaultFormatAlpha
	)

protected

Notify the manager of a OpenGL context change. This should be the first thing to call after you created an OpenGL (ES) context!

Parameters

type	Type of the OpenGL (ES) contexts created.
defaultFormat	The new default format for the game screen (this is used for the CLUT8 game screens).
defaultFormatAlpha	The new default format with an alpha channel (this is used for the overlay and cursor).

◆ notifyContextDestroy()

void OpenGL::OpenGLGraphicsManager::notifyContextDestroy ( )

protected

Notify the manager that the OpenGL context is about to be destroyed. This will free up/reset internal OpenGL related state and must be called whenever a context might be created again after destroying a context.

◆ createSurface()

Surface* OpenGL::OpenGLGraphicsManager::createSurface	(	const Graphics::PixelFormat &	format,
		bool	wantAlpha = `false`,
		bool	wantScaler = `false`,
		bool	wantMask = `false`
	)

protected

Create a surface with the specified pixel format.

Parameters

format	The pixel format the Surface object should accept as input.
wantAlpha	For CLUT8 surfaces this marks whether an alpha channel should be used.
wantScaler	Whether or not a software scaler should be used.

Returns: A pointer to the surface or nullptr on failure.

◆ loadVideoMode()

virtual bool OpenGL::OpenGLGraphicsManager::loadVideoMode	(	uint	requestedWidth,
		uint	requestedHeight,
		const Graphics::PixelFormat &	format
	)

protectedpure virtual

Set up the requested video mode. This takes parameters which describe what resolution the game screen requests (this is possibly aspect ratio corrected!).

A sub-class should take these parameters as hints. It might very well set up a mode which it thinks suites the situation best.

requestedWidth This is the requested actual game screen width.

Parameters

requestedHeight	This is the requested actual game screen height.
format	This is the requested pixel format of the virtual game screen.

Returns: true on success, false otherwise

Implemented in AndroidGraphicsManager, iOSGraphicsManager, and OpenGLSdlGraphicsManager.

◆ refreshScreen()

virtual void OpenGL::OpenGLGraphicsManager::refreshScreen ( )

protectedpure virtual

Refresh the screen contents.

Implemented in AndroidGraphicsManager, iOSGraphicsManager, and OpenGLSdlGraphicsManager.

◆ saveScreenshot()

bool OpenGL::OpenGLGraphicsManager::saveScreenshot ( const Common::Path & filename ) const

protected

Saves a screenshot of the entire window, excluding window decorations.

Parameters

filename The output filename.

Returns: true on success, false otherwise

◆ getGLPixelFormat()

bool OpenGL::OpenGLGraphicsManager::getGLPixelFormat	(	const Graphics::PixelFormat &	pixelFormat,
		GLenum &	glIntFormat,
		GLenum &	glFormat,
		GLenum &	glType
	)		const

protected

Try to determine the internal parameters for a given pixel format.

Returns: true when the format can be used, false otherwise.

◆ gameNeedsAspectRatioCorrection()

bool OpenGL::OpenGLGraphicsManager::gameNeedsAspectRatioCorrection ( ) const

overrideprotectedvirtual

Returns: whether or not the game screen must have aspect ratio correction applied for correct rendering.

Implements WindowedGraphicsManager.

◆ getGameRenderScale()

int OpenGL::OpenGLGraphicsManager::getGameRenderScale ( ) const

overrideprotectedvirtual

Returns: the scale used between the game size and the surface on which it is rendered.

Reimplemented from WindowedGraphicsManager.

◆ recalculateDisplayAreas()

void OpenGL::OpenGLGraphicsManager::recalculateDisplayAreas ( )

overrideprotectedvirtual

Recalculates the display areas for the game and overlay surfaces within the window.

Reimplemented from WindowedGraphicsManager.

◆ handleResizeImpl()

void OpenGL::OpenGLGraphicsManager::handleResizeImpl	(	const int	width,
		const int	height
	)

overrideprotectedvirtual

Backend-specific implementation for updating internal surfaces that need to reflect the new window size.

Implements WindowedGraphicsManager.

Reimplemented in OpenGLSdlGraphicsManager.

◆ updateCursorPalette()

void OpenGL::OpenGLGraphicsManager::updateCursorPalette ( )

protected

Set up the correct cursor palette.

◆ recalculateCursorScaling()

void OpenGL::OpenGLGraphicsManager::recalculateCursorScaling ( )

protected

Recalculate the cursor scaling. Scaling is always done according to the game screen.

◆ getFontOSD()

virtual const Graphics::Font* OpenGL::OpenGLGraphicsManager::getFontOSD ( ) const

protectedvirtual

Returns the font used for on screen display

Member Data Documentation

◆ _currentState

VideoState OpenGL::OpenGLGraphicsManager::_currentState

protected

The currently set up video state.

◆ _oldState

VideoState OpenGL::OpenGLGraphicsManager::_oldState

protected

The old video state used when doing a transaction rollback.

◆ _defaultFormat

Graphics::PixelFormat OpenGL::OpenGLGraphicsManager::_defaultFormat

protected

The default pixel format of the backend.

◆ _defaultFormatAlpha

Graphics::PixelFormat OpenGL::OpenGLGraphicsManager::_defaultFormatAlpha

protected

The default pixel format with an alpha channel.

◆ _targetBuffer

Framebuffer* OpenGL::OpenGLGraphicsManager::_targetBuffer

protected

Render target.

◆ _gameScreen

Surface* OpenGL::OpenGLGraphicsManager::_gameScreen

protected

The rendering surface for the virtual game screen.

◆ _gamePalette

byte OpenGL::OpenGLGraphicsManager::_gamePalette[3 *256]

protected

The game palette if in CLUT8 mode.

◆ _overlay

Surface* OpenGL::OpenGLGraphicsManager::_overlay

protected

The rendering surface for the overlay.

◆ _cursor

Surface* OpenGL::OpenGLGraphicsManager::_cursor

protected

The rendering surface for the mouse cursor.

◆ _cursorMask

Surface* OpenGL::OpenGLGraphicsManager::_cursorMask

protected

The rendering surface for the opacity and inversion mask (if any)

◆ _cursorHotspotX

int OpenGL::OpenGLGraphicsManager::_cursorHotspotX

protected

The X offset for the cursor hotspot in unscaled game coordinates.

◆ _cursorHotspotY

int OpenGL::OpenGLGraphicsManager::_cursorHotspotY

protected

The Y offset for the cursor hotspot in unscaled game coordinates.

◆ _cursorHotspotXScaled

int OpenGL::OpenGLGraphicsManager::_cursorHotspotXScaled

protected

The X offset for the cursor hotspot in scaled game display area coordinates.

◆ _cursorHotspotYScaled

int OpenGL::OpenGLGraphicsManager::_cursorHotspotYScaled

protected

The Y offset for the cursor hotspot in scaled game display area coordinates.

◆ _cursorWidthScaled

float OpenGL::OpenGLGraphicsManager::_cursorWidthScaled

protected

The width of the cursor in scaled game display area coordinates.

◆ _cursorHeightScaled

float OpenGL::OpenGLGraphicsManager::_cursorHeightScaled

protected

The height of the cursor in scaled game display area coordinates.

◆ _cursorKeyColor

uint32 OpenGL::OpenGLGraphicsManager::_cursorKeyColor

protected

The key color.

◆ _cursorUseKey

bool OpenGL::OpenGLGraphicsManager::_cursorUseKey

protected

If true, use key color.

◆ _cursorDontScale

bool OpenGL::OpenGLGraphicsManager::_cursorDontScale

protected

Whether no cursor scaling should be applied.

◆ _cursorPaletteEnabled

bool OpenGL::OpenGLGraphicsManager::_cursorPaletteEnabled

protected

Whether the special cursor palette is enabled.

◆ _cursorPalette

byte OpenGL::OpenGLGraphicsManager::_cursorPalette[3 *256]

protected

The special cursor palette in case enabled.

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

backends/graphics/opengl/opengl-graphics.h

Classes

Public Member Functions

Protected Types

Protected Member Functions

Protected Attributes

Member Function Documentation

◆ setPalette()

◆ grabPalette()

◆ isGLESContext()

◆ notifyContextCreate()

◆ notifyContextDestroy()

◆ createSurface()

◆ loadVideoMode()

◆ refreshScreen()

◆ saveScreenshot()

◆ getGLPixelFormat()

◆ gameNeedsAspectRatioCorrection()

◆ getGameRenderScale()

◆ recalculateDisplayAreas()

◆ handleResizeImpl()

◆ updateCursorPalette()

◆ recalculateCursorScaling()

◆ getFontOSD()

Member Data Documentation

◆ _currentState

◆ _oldState

◆ _defaultFormat

◆ _defaultFormatAlpha

◆ _targetBuffer

◆ _gameScreen

◆ _gamePalette

◆ _overlay

◆ _cursor

◆ _cursorMask

◆ _cursorHotspotX

◆ _cursorHotspotY

◆ _cursorHotspotXScaled

◆ _cursorHotspotYScaled

◆ _cursorWidthScaled

◆ _cursorHeightScaled

◆ _cursorKeyColor

◆ _cursorUseKey

◆ _cursorDontScale

◆ _cursorPaletteEnabled

◆ _cursorPalette