A collection of pixels used in software blitting. More...

Inheritance diagram for SDL::Surface:

Public Member Functions
constexpr	Surface (SurfaceRaw resource) noexcept
	Constructs from raw Surface.
constexpr	Surface (const Surface &other)
	Copy constructor.
constexpr	Surface (Surface &&other) noexcept
	Move constructor.
	Surface (const PointRaw &size, PixelFormat format)
	Allocate a new surface with a specific pixel format.
	Surface (const PointRaw &size, PixelFormat format, void *pixels, int pitch)
	Allocate a new surface with a specific pixel format and existing pixel data.
	Surface (StringParam file)
	Load an image from a filesystem path into a software surface.
	Surface (IOStreamRef src, bool closeio=false)
	Load an image from an SDL data source into a software surface.
constexpr	operator SurfaceConstRef () const noexcept
	Converts to SurfaceConstRef.
	~Surface ()
	Destructor.
constexpr Surface &	operator= (Surface &&other) noexcept
	Assignment operator.
Surface &	operator= (const Surface &other)
	Assignment operator.
void	Destroy ()
	Free this surface.
constexpr bool	MustLock () const
	Evaluates to true if the surface needs to be locked before access.
PropertiesRef	GetProperties () const
	Get the properties associated with a surface.
void	SetColorspace (Colorspace colorspace)
	Set the colorspace used by a surface.
Colorspace	GetColorspace () const
	Get the colorspace used by a surface.
Palette	CreatePalette ()
	Create a palette and associate it with a surface.
void	SetPalette (PaletteRef palette)
	Set the palette used by a surface.
Palette	GetPalette () const
	Get the palette used by a surface.
void	AddAlternateImage (SurfaceRef image)
	Add an alternate version of a surface.
bool	HasAlternateImages () const
	Return whether a surface has alternate versions available.
OwnArray< SurfaceRaw >	GetImages () const
	Get an array including all versions of a surface.
void	RemoveAlternateImages ()
	Remove all alternate versions of a surface.
SurfaceLock	Lock ()
	Set up a surface for directly accessing the pixels.
void	Unlock (SurfaceLock &&lock)
	Release a surface after directly accessing the pixels.
void	SaveBMP_IO (IOStreamRef dst, bool closeio=false) const
	Save a surface to a seekable SDL data stream in BMP format.
void	SaveBMP (StringParam file) const
	Save a surface to a file in BMP format.
void	SavePNG_IO (IOStreamRef dst, bool closeio=false) const
	Save a surface to a seekable SDL data stream in PNG format.
void	SavePNG (StringParam file) const
	Save a surface to a file in PNG format.
void	SetRLE (bool enabled)
	Set the RLE acceleration hint for a surface.
bool	HasRLE () const
	Returns whether the surface is RLE enabled.
void	SetColorKey (std::optional< Uint32 > key)
	Set the color key (transparent pixel) in a surface.
void	ClearColorKey ()
	Unset the color key (transparent pixel) in a surface.
bool	HasColorKey () const
	Returns whether the surface has a color key.
std::optional< Uint32 >	GetColorKey () const
	Get the color key (transparent pixel) for a surface.
void	SetColorMod (Uint8 r, Uint8 g, Uint8 b)
	Set an additional color value multiplied into blit operations.
void	GetColorMod (Uint8 r, Uint8 g, Uint8 *b) const
	Get the additional color value multiplied into blit operations.
void	SetAlphaMod (Uint8 alpha)
	Set an additional alpha value used in blit operations.
Uint8	GetAlphaMod () const
	Get the additional alpha value used in blit operations.
void	SetMod (Color color)
	Set an additional color and alpha value multiplied into blit operations.
Color	GetMod () const
	Get the additional color and alpha value multiplied into blit operations.
void	SetBlendMode (BlendMode blendMode)
	Set the blend mode used for blit operations.
BlendMode	GetBlendMode () const
	Get the blend mode used for blit operations.
bool	SetClipRect (OptionalRef< const RectRaw > rect)
	Set the clipping rectangle for a surface.
void	ResetClipRect ()
	Disable the clipping rectangle for a surface.
Rect	GetClipRect () const
	Get the clipping rectangle for a surface.
void	Flip (FlipMode flip)
	Flip a surface vertically or horizontally.
Surface	Rotate (float angle)
	Return a copy of a surface rotated clockwise a number of degrees.
Surface	Duplicate () const
	Creates a new surface identical to the existing surface.
Surface	Scale (const PointRaw &size, ScaleMode scaleMode) const
	Creates a new surface identical to the existing surface, scaled to the desired size.
Surface	Convert (PixelFormat format) const
	Copy an existing surface to a new surface of the specified format.
Surface	Convert (PixelFormat format, PaletteRef palette, Colorspace colorspace, PropertiesRef props) const
	Copy an existing surface to a new surface of the specified format and colorspace.
void	PremultiplyAlpha (bool linear)
	Premultiply the alpha in a surface.
void	Clear (const FColorRaw &c)
	Clear a surface with a specific color, with floating point precision.
void	FillRect (OptionalRef< const RectRaw > rect, Uint32 color)
	Perform a fast fill of a rectangle with a specific color.
void	Fill (Uint32 color)
	Perform a fast fill of a rectangle with a specific color.
void	FillRects (SpanRef< const RectRaw > rects, Uint32 color)
	Perform a fast fill of a set of rectangles with a specific color.
void	Blit (SurfaceRef src, OptionalRef< const RectRaw > srcrect, OptionalRef< const RectRaw > dstrect)
	Performs a fast blit from the source surface to the destination surface with clipping.
void	BlitAt (SurfaceRef src, OptionalRef< const RectRaw > srcrect, const PointRaw &dstpos)
	Performs a fast blit from the source surface to the destination surface with clipping.
void	BlitUnchecked (SurfaceRef src, const RectRaw &srcrect, const RectRaw &dstrect)
	Perform low-level surface blitting only.
void	BlitScaled (SurfaceRef src, OptionalRef< const RectRaw > srcrect, OptionalRef< const RectRaw > dstrect, ScaleMode scaleMode)
	Perform a scaled blit to a destination surface, which may be of a different format.
void	BlitUncheckedScaled (SurfaceRef src, const RectRaw &srcrect, const RectRaw &dstrect, ScaleMode scaleMode)
	Perform low-level surface scaled blitting only.
void	Stretch (SurfaceRef src, OptionalRef< RectRaw > srcrect, OptionalRef< RectRaw > dstrect, ScaleMode scaleMode)
	Perform a stretched pixel copy from one surface to another.
void	BlitTiled (SurfaceRef src, OptionalRef< const RectRaw > srcrect, OptionalRef< const RectRaw > dstrect)
	Perform a tiled blit to a destination surface, which may be of a different format.
void	BlitTiledWithScale (SurfaceRef src, OptionalRef< const RectRaw > srcrect, float scale, ScaleMode scaleMode, OptionalRef< const RectRaw > dstrect)
	Perform a scaled and tiled blit to a destination surface, which may be of a different format.
void	Blit9Grid (SurfaceRef src, OptionalRef< const RectRaw > srcrect, int left_width, int right_width, int top_height, int bottom_height, OptionalRef< const RectRaw > dstrect, float scale=1, ScaleMode scaleMode=SCALEMODE_NEAREST)
	Perform a scaled blit using the 9-grid algorithm to a destination surface, which may be of a different format.
Uint32	MapRGB (Uint8 r, Uint8 g, Uint8 b) const
	Map an RGB triple to an opaque pixel value for a surface.
Uint32	MapRGBA (ColorRaw c) const
	Map an RGBA quadruple to a pixel value for a surface.
void	ReadPixel (const PointRaw &p, Uint8 r, Uint8 g, Uint8 b, Uint8 a) const
	Retrieves a single pixel from a surface.
Color	ReadPixel (const PointRaw &p) const
	Retrieves a single pixel from a surface.
void	ReadPixelFloat (const PointRaw &p, float r, float g, float b, float a) const
	Retrieves a single pixel from a surface.
FColor	ReadPixelFloat (const PointRaw &p) const
	Retrieves a single pixel from a surface.
void	WritePixel (const PointRaw &p, ColorRaw c)
	Writes a single pixel to a surface.
void	WritePixelFloat (const PointRaw &p, const FColorRaw &c)
	Writes a single pixel to a surface.
constexpr int	GetWidth () const
	Get the width in pixels.
constexpr int	GetHeight () const
	Get the height in pixels.
constexpr Point	GetSize () const
	Get the size in pixels.
constexpr int	GetPitch () const
	Get pitch in bytes.
constexpr PixelFormat	GetFormat () const
	Get the pixel format.
constexpr void *	GetPixels () const
	Get the pixels.
void	Save (StringParam filename) const
	Save an Surface into an image file.
void	SaveTyped_IO (IOStreamRef dst, StringParam type, bool closeio=false) const
	Save an Surface into formatted image data, via an IOStream.
constexpr	ResourceBase (RawPointer resource)
	Constructs from resource pointer.
constexpr	ResourceBase (std::nullptr_t=nullptr)
	Constructs null/invalid.
Public Member Functions inherited from SDL::ResourceBase< SurfaceRaw, SurfaceRawConst >
constexpr	ResourceBase (RawPointer resource)
	Constructs from resource pointer.
constexpr	operator bool () const
	Converts to bool.
constexpr auto	operator<=> (const ResourceBase &other) const=default
	Comparison.
constexpr RawConstPointer	operator-> () const noexcept
	member access to underlying resource pointer.
constexpr RawPointer	get () const noexcept
	Retrieves underlying resource pointer.
constexpr RawPointer	release () noexcept
	Retrieves underlying resource pointer and clear this.

Static Public Member Functions
static Surface	Borrow (SurfaceRaw resource)
	Safely borrows the from SurfaceRaw.

Additional Inherited Members
Public Types inherited from SDL::ResourceBase< SurfaceRaw, SurfaceRawConst >
using	RawPointer
	The underlying raw pointer type.
using	RawConstPointer
	The underlying const raw pointer type.

Detailed Description

A collection of pixels used in software blitting.

Pixels are arranged in memory in rows, with the top row first. Each row occupies an amount of memory given by the pitch (sometimes known as the row stride in non-SDL APIs).

Within each row, pixels are arranged from left to right until the width is reached. Each pixel occupies a number of bits appropriate for its format, with most formats representing each pixel as one or more whole bytes (in some indexed formats, instead multiple pixels are packed into each byte), and a byte order given by the format. After encoding all pixels, any remaining bytes to reach the pitch are used as padding to reach a desired alignment, and have undefined contents.

When a surface holds YUV format data, the planes are assumed to be contiguous without padding between them, e.g. a 32x32 surface in NV12 format with a pitch of 32 would consist of 32x32 bytes of Y plane followed by 32x16 bytes of UV plane.

When a surface holds MJPG format data, pixels points at the compressed JPEG image and pitch is the length of that data.

Since: This struct is available since SDL 3.2.0.

See also: CreateSurface; Surface.Destroy

Constructor & Destructor Documentation

◆ Surface()

SDL::Surface::Surface ( SurfaceRaw resource )

inlineexplicitconstexprnoexcept

Constructs from raw Surface.

Parameters

resource a SurfaceRaw to be wrapped.

This assumes the ownership, call release() if you need to take back.

Member Function Documentation

◆ Borrow()

Surface SDL::Surface::Borrow ( SurfaceRaw resource )

inlinestatic

Safely borrows the from SurfaceRaw.

Parameters

resource a SurfaceRaw.

This does not takes ownership!

◆ MustLock()

bool SDL::Surface::MustLock ( ) const

inlineconstexpr

Evaluates to true if the surface needs to be locked before access.

Since: This function is available since SDL 3.2.0.

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

SDL3pp/SDL3pp_surface.h
SDL3pp/SDL3pp_image.h

Public Member Functions