1048 lines
40 KiB
C
1048 lines
40 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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/**
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* \file SDL_surface.h
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*
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* Header file for ::SDL_Surface definition and management functions.
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*/
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#ifndef SDL_surface_h_
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#define SDL_surface_h_
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#include <SDL3/SDL_stdinc.h>
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#include <SDL3/SDL_blendmode.h>
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#include <SDL3/SDL_pixels.h>
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#include <SDL3/SDL_properties.h>
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#include <SDL3/SDL_rect.h>
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#include <SDL3/SDL_iostream.h>
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#include <SDL3/SDL_begin_code.h>
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/* Set up for C function definitions, even when using C++ */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \name Surface flags
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*
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* These are the currently supported flags for the ::SDL_Surface.
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*
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* \internal
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* Used internally (read-only).
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*/
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/* @{ */
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#define SDL_SWSURFACE 0 /**< Just here for compatibility */
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#define SDL_PREALLOC 0x00000001 /**< Surface uses preallocated memory */
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#define SDL_RLEACCEL 0x00000002 /**< Surface is RLE encoded */
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#define SDL_DONTFREE 0x00000004 /**< Surface is referenced internally */
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#define SDL_SIMD_ALIGNED 0x00000008 /**< Surface uses aligned memory */
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#define SDL_SURFACE_USES_PROPERTIES 0x00000010 /**< Surface uses properties */
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/* @} *//* Surface flags */
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/**
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* Evaluates to true if the surface needs to be locked before access.
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*/
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#define SDL_MUSTLOCK(S) (((S)->flags & SDL_RLEACCEL) != 0)
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typedef struct SDL_BlitMap SDL_BlitMap; /* this is an opaque type. */
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/**
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* The scaling mode
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*/
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typedef enum
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{
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SDL_SCALEMODE_NEAREST, /**< nearest pixel sampling */
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SDL_SCALEMODE_LINEAR, /**< linear filtering */
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SDL_SCALEMODE_BEST /**< anisotropic filtering */
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} SDL_ScaleMode;
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/**
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* The flip mode
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*/
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typedef enum
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{
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SDL_FLIP_NONE, /**< Do not flip */
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SDL_FLIP_HORIZONTAL, /**< flip horizontally */
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SDL_FLIP_VERTICAL /**< flip vertically */
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} SDL_FlipMode;
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/**
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* A collection of pixels used in software blitting.
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*
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* Pixels are arranged in memory in rows, with the top row first.
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* Each row occupies an amount of memory given by the pitch (sometimes
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* known as the row stride in non-SDL APIs).
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*
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* Within each row, pixels are arranged from left to right until the
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* width is reached.
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* Each pixel occupies a number of bits appropriate for its format, with
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* most formats representing each pixel as one or more whole bytes
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* (in some indexed formats, instead multiple pixels are packed into
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* each byte), and a byte order given by the format.
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* After encoding all pixels, any remaining bytes to reach the pitch are
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* used as padding to reach a desired alignment, and have undefined contents.
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*
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* \note This structure should be treated as read-only, except for \c pixels,
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* which, if not NULL, contains the raw pixel data for the surface.
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*/
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typedef struct SDL_Surface
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{
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Uint32 flags; /**< Read-only */
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SDL_PixelFormat *format; /**< Read-only */
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int w, h; /**< Read-only */
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int pitch; /**< Read-only */
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void *pixels; /**< Read-write */
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void *reserved; /**< Private */
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/** information needed for surfaces requiring locks */
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int locked; /**< Read-only */
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/** list of BlitMap that hold a reference to this surface */
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void *list_blitmap; /**< Private */
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/** clipping information */
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SDL_Rect clip_rect; /**< Read-only */
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/** info for fast blit mapping to other surfaces */
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SDL_BlitMap *map; /**< Private */
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/** Reference count -- used when freeing surface */
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int refcount; /**< Read-mostly */
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} SDL_Surface;
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/**
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* The type of function used for surface blitting functions.
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*/
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typedef int (SDLCALL *SDL_blit) (struct SDL_Surface *src, const SDL_Rect *srcrect,
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struct SDL_Surface *dst, const SDL_Rect *dstrect);
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/**
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* Allocate a new RGB surface with a specific pixel format.
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*
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* \param width the width of the surface
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* \param height the height of the surface
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* \param format the SDL_PixelFormatEnum for the new surface's pixel format.
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* \returns the new SDL_Surface structure that is created or NULL if it fails;
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* call SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_CreateSurfaceFrom
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* \sa SDL_DestroySurface
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*/
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extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateSurface(int width, int height, SDL_PixelFormatEnum format);
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/**
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* Allocate a new RGB surface with a specific pixel format and existing pixel
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* data.
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*
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* No copy is made of the pixel data. Pixel data is not managed automatically;
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* you must free the surface before you free the pixel data.
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*
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* Pitch is the offset in bytes from one row of pixels to the next, e.g.
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* `width*4` for `SDL_PIXELFORMAT_RGBA8888`.
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*
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* You may pass NULL for pixels and 0 for pitch to create a surface that you
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* will fill in with valid values later.
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*
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* \param pixels a pointer to existing pixel data
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* \param width the width of the surface
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* \param height the height of the surface
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* \param pitch the number of bytes between each row, including padding
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* \param format the SDL_PixelFormatEnum for the new surface's pixel format.
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* \returns the new SDL_Surface structure that is created or NULL if it fails;
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* call SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_CreateSurface
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* \sa SDL_DestroySurface
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*/
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extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateSurfaceFrom(void *pixels, int width, int height, int pitch, SDL_PixelFormatEnum format);
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/**
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* Free an RGB surface.
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*
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* It is safe to pass NULL to this function.
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*
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* \param surface the SDL_Surface to free.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_CreateSurface
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* \sa SDL_CreateSurfaceFrom
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*/
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extern DECLSPEC void SDLCALL SDL_DestroySurface(SDL_Surface *surface);
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/**
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* Get the properties associated with a surface.
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*
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* The following properties are understood by SDL:
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*
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* - `SDL_PROP_SURFACE_COLORSPACE_NUMBER`: an SDL_ColorSpace value describing
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* the surface colorspace, defaults to SDL_COLORSPACE_SRGB_LINEAR for
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* floating point formats, SDL_COLORSPACE_HDR10 for 10-bit formats,
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* SDL_COLORSPACE_SRGB for other RGB surfaces and SDL_COLORSPACE_BT709_FULL
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* for YUV surfaces.
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* - `SDL_PROP_SURFACE_SDR_WHITE_POINT_FLOAT`: for HDR10 and floating point
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* surfaces, this defines the value of 100% diffuse white, with higher
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* values being displayed in the High Dynamic Range headroom. This defaults
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* to 203 for HDR10 surfaces and 1.0 for floating point surfaces.
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* - `SDL_PROP_SURFACE_HDR_HEADROOM_FLOAT`: for HDR10 and floating point
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* surfaces, this defines the maximum dynamic range used by the content, in
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* terms of the SDR white point. This defaults to 0.0, which disables tone
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* mapping.
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* - `SDL_PROP_SURFACE_TONEMAP_OPERATOR_STRING`: the tone mapping operator
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* used when compressing from a surface with high dynamic range to another
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* with lower dynamic range. Currently this supports "chrome", which uses
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* the same tone mapping that Chrome uses for HDR content, the form "*=N",
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* where N is a floating point scale factor applied in linear space, and
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* "none", which disables tone mapping. This defaults to "chrome".
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*
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* \param surface the SDL_Surface structure to query
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* \returns a valid property ID on success or 0 on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_GetProperty
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* \sa SDL_SetProperty
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*/
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extern DECLSPEC SDL_PropertiesID SDLCALL SDL_GetSurfaceProperties(SDL_Surface *surface);
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#define SDL_PROP_SURFACE_COLORSPACE_NUMBER "SDL.surface.colorspace"
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#define SDL_PROP_SURFACE_SDR_WHITE_POINT_FLOAT "SDL.surface.SDR_white_point"
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#define SDL_PROP_SURFACE_HDR_HEADROOM_FLOAT "SDL.surface.HDR_headroom"
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#define SDL_PROP_SURFACE_TONEMAP_OPERATOR_STRING "SDL.surface.tonemap"
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/**
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* Set the colorspace used by a surface.
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*
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* Setting the colorspace doesn't change the pixels, only how they are
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* interpreted in color operations.
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*
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* \param surface the SDL_Surface structure to update
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* \param colorspace an SDL_ColorSpace value describing the surface colorspace
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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*/
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extern DECLSPEC int SDLCALL SDL_SetSurfaceColorspace(SDL_Surface *surface, SDL_Colorspace colorspace);
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/**
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* Get the colorspace used by a surface.
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*
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* The colorspace defaults to SDL_COLORSPACE_SRGB_LINEAR for floating point
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* formats, SDL_COLORSPACE_HDR10 for 10-bit formats, SDL_COLORSPACE_SRGB for
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* other RGB surfaces and SDL_COLORSPACE_BT709_FULL for YUV textures.
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*
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* \param surface the SDL_Surface structure to query
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* \param colorspace a pointer filled in with an SDL_ColorSpace value
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* describing the surface colorspace
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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*/
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extern DECLSPEC int SDLCALL SDL_GetSurfaceColorspace(SDL_Surface *surface, SDL_Colorspace *colorspace);
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/**
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* Set the palette used by a surface.
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*
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* A single palette can be shared with many surfaces.
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*
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* \param surface the SDL_Surface structure to update
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* \param palette the SDL_Palette structure to use
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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*/
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extern DECLSPEC int SDLCALL SDL_SetSurfacePalette(SDL_Surface *surface, SDL_Palette *palette);
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/**
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* Set up a surface for directly accessing the pixels.
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*
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* Between calls to SDL_LockSurface() / SDL_UnlockSurface(), you can write to
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* and read from `surface->pixels`, using the pixel format stored in
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* `surface->format`. Once you are done accessing the surface, you should use
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* SDL_UnlockSurface() to release it.
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*
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* Not all surfaces require locking. If `SDL_MUSTLOCK(surface)` evaluates to
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* 0, then you can read and write to the surface at any time, and the pixel
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* format of the surface will not change.
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*
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* \param surface the SDL_Surface structure to be locked
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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_MUSTLOCK
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* \sa SDL_UnlockSurface
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*/
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extern DECLSPEC int SDLCALL SDL_LockSurface(SDL_Surface *surface);
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/**
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* Release a surface after directly accessing the pixels.
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*
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* \param surface the SDL_Surface structure to be unlocked
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_LockSurface
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*/
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extern DECLSPEC void SDLCALL SDL_UnlockSurface(SDL_Surface *surface);
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/**
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* Load a BMP image from a seekable SDL data stream.
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*
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* The new surface should be freed with SDL_DestroySurface(). Not doing so
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* will result in a memory leak.
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*
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* \param src the data stream for the surface
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* \param closeio if SDL_TRUE, calls SDL_CloseIO() on `src` before returning,
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* even in the case of an error
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* \returns a pointer to a new SDL_Surface structure or NULL if there was an
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* error; call SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_DestroySurface
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* \sa SDL_LoadBMP
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* \sa SDL_SaveBMP_IO
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*/
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extern DECLSPEC SDL_Surface *SDLCALL SDL_LoadBMP_IO(SDL_IOStream *src, SDL_bool closeio);
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/**
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* Load a BMP image from a file.
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*
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* The new surface should be freed with SDL_DestroySurface(). Not doing so
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* will result in a memory leak.
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*
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* \param file the BMP file to load
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* \returns a pointer to a new SDL_Surface structure or NULL if there was an
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* error; call SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_DestroySurface
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* \sa SDL_LoadBMP_IO
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* \sa SDL_SaveBMP
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*/
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extern DECLSPEC SDL_Surface *SDLCALL SDL_LoadBMP(const char *file);
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/**
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* Save a surface to a seekable SDL data stream in BMP format.
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*
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* Surfaces with a 24-bit, 32-bit and paletted 8-bit format get saved in the
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* BMP directly. Other RGB formats with 8-bit or higher get converted to a
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* 24-bit surface or, if they have an alpha mask or a colorkey, to a 32-bit
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* surface before they are saved. YUV and paletted 1-bit and 4-bit formats are
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* not supported.
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*
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* \param surface the SDL_Surface structure containing the image to be saved
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* \param dst a data stream to save to
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* \param closeio if SDL_TRUE, calls SDL_CloseIO() on `dst` before returning,
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* even in the case of an error
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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_LoadBMP_IO
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* \sa SDL_SaveBMP
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*/
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extern DECLSPEC int SDLCALL SDL_SaveBMP_IO(SDL_Surface *surface, SDL_IOStream *dst, SDL_bool closeio);
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/**
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* Save a surface to a file.
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*
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* Surfaces with a 24-bit, 32-bit and paletted 8-bit format get saved in the
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* BMP directly. Other RGB formats with 8-bit or higher get converted to a
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* 24-bit surface or, if they have an alpha mask or a colorkey, to a 32-bit
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* surface before they are saved. YUV and paletted 1-bit and 4-bit formats are
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* not supported.
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*
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* \param surface the SDL_Surface structure containing the image to be saved
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* \param file a file to save to
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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_LoadBMP
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* \sa SDL_SaveBMP_IO
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*/
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extern DECLSPEC int SDLCALL SDL_SaveBMP(SDL_Surface *surface, const char *file);
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/**
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* Set the RLE acceleration hint for a surface.
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*
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* If RLE is enabled, color key and alpha blending blits are much faster, but
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* the surface must be locked before directly accessing the pixels.
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*
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* \param surface the SDL_Surface structure to optimize
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* \param flag 0 to disable, non-zero to enable RLE acceleration
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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_BlitSurface
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* \sa SDL_LockSurface
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* \sa SDL_UnlockSurface
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*/
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extern DECLSPEC int SDLCALL SDL_SetSurfaceRLE(SDL_Surface *surface, int flag);
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/**
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* Returns whether the surface is RLE enabled
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*
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* It is safe to pass a NULL `surface` here; it will return SDL_FALSE.
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*
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* \param surface the SDL_Surface structure to query
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* \returns SDL_TRUE if the surface is RLE enabled, SDL_FALSE otherwise.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_SetSurfaceRLE
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*/
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extern DECLSPEC SDL_bool SDLCALL SDL_SurfaceHasRLE(SDL_Surface *surface);
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/**
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* Set the color key (transparent pixel) in a surface.
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*
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* The color key defines a pixel value that will be treated as transparent in
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* a blit. For example, one can use this to specify that cyan pixels should be
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* considered transparent, and therefore not rendered.
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*
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* It is a pixel of the format used by the surface, as generated by
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* SDL_MapRGB().
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*
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* RLE acceleration can substantially speed up blitting of images with large
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* horizontal runs of transparent pixels. See SDL_SetSurfaceRLE() for details.
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*
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* \param surface the SDL_Surface structure to update
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* \param flag SDL_TRUE to enable color key, SDL_FALSE to disable color key
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* \param key the transparent pixel
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* \returns 0 on success or a negative error code on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_GetSurfaceColorKey
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* \sa SDL_SurfaceHasColorKey
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*/
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extern DECLSPEC int SDLCALL SDL_SetSurfaceColorKey(SDL_Surface *surface, int flag, Uint32 key);
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/**
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* Returns whether the surface has a color key
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*
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* It is safe to pass a NULL `surface` here; it will return SDL_FALSE.
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*
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* \param surface the SDL_Surface structure to query
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* \returns SDL_TRUE if the surface has a color key, SDL_FALSE otherwise.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_SetSurfaceColorKey
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* \sa SDL_GetSurfaceColorKey
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*/
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extern DECLSPEC SDL_bool SDLCALL SDL_SurfaceHasColorKey(SDL_Surface *surface);
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|
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/**
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* Get the color key (transparent pixel) for a surface.
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|
*
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|
* The color key is a pixel of the format used by the surface, as generated by
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* SDL_MapRGB().
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*
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* If the surface doesn't have color key enabled this function returns -1.
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|
*
|
|
* \param surface the SDL_Surface structure to query
|
|
* \param key a pointer filled in with the transparent pixel
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_SetSurfaceColorKey
|
|
* \sa SDL_SurfaceHasColorKey
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_GetSurfaceColorKey(SDL_Surface *surface, Uint32 *key);
|
|
|
|
/**
|
|
* Set an additional color value multiplied into blit operations.
|
|
*
|
|
* When this surface is blitted, during the blit operation each source color
|
|
* channel is modulated by the appropriate color value according to the
|
|
* following formula:
|
|
*
|
|
* `srcC = srcC * (color / 255)`
|
|
*
|
|
* \param surface the SDL_Surface structure to update
|
|
* \param r the red color value multiplied into blit operations
|
|
* \param g the green color value multiplied into blit operations
|
|
* \param b the blue color value multiplied into blit operations
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_GetSurfaceColorMod
|
|
* \sa SDL_SetSurfaceAlphaMod
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_SetSurfaceColorMod(SDL_Surface *surface, Uint8 r, Uint8 g, Uint8 b);
|
|
|
|
|
|
/**
|
|
* Get the additional color value multiplied into blit operations.
|
|
*
|
|
* \param surface the SDL_Surface structure to query
|
|
* \param r a pointer filled in with the current red color value
|
|
* \param g a pointer filled in with the current green color value
|
|
* \param b a pointer filled in with the current blue color value
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_GetSurfaceAlphaMod
|
|
* \sa SDL_SetSurfaceColorMod
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_GetSurfaceColorMod(SDL_Surface *surface, Uint8 *r, Uint8 *g, Uint8 *b);
|
|
|
|
/**
|
|
* Set an additional alpha value used in blit operations.
|
|
*
|
|
* When this surface is blitted, during the blit operation the source alpha
|
|
* value is modulated by this alpha value according to the following formula:
|
|
*
|
|
* `srcA = srcA * (alpha / 255)`
|
|
*
|
|
* \param surface the SDL_Surface structure to update
|
|
* \param alpha the alpha value multiplied into blit operations
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_GetSurfaceAlphaMod
|
|
* \sa SDL_SetSurfaceColorMod
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_SetSurfaceAlphaMod(SDL_Surface *surface, Uint8 alpha);
|
|
|
|
/**
|
|
* Get the additional alpha value used in blit operations.
|
|
*
|
|
* \param surface the SDL_Surface structure to query
|
|
* \param alpha a pointer filled in with the current alpha value
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_GetSurfaceColorMod
|
|
* \sa SDL_SetSurfaceAlphaMod
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_GetSurfaceAlphaMod(SDL_Surface *surface, Uint8 *alpha);
|
|
|
|
/**
|
|
* Set the blend mode used for blit operations.
|
|
*
|
|
* To copy a surface to another surface (or texture) without blending with the
|
|
* existing data, the blendmode of the SOURCE surface should be set to
|
|
* `SDL_BLENDMODE_NONE`.
|
|
*
|
|
* \param surface the SDL_Surface structure to update
|
|
* \param blendMode the SDL_BlendMode to use for blit blending
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_GetSurfaceBlendMode
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_SetSurfaceBlendMode(SDL_Surface *surface, SDL_BlendMode blendMode);
|
|
|
|
/**
|
|
* Get the blend mode used for blit operations.
|
|
*
|
|
* \param surface the SDL_Surface structure to query
|
|
* \param blendMode a pointer filled in with the current SDL_BlendMode
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_SetSurfaceBlendMode
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_GetSurfaceBlendMode(SDL_Surface *surface, SDL_BlendMode *blendMode);
|
|
|
|
/**
|
|
* Set the clipping rectangle for a surface.
|
|
*
|
|
* When `surface` is the destination of a blit, only the area within the clip
|
|
* rectangle is drawn into.
|
|
*
|
|
* Note that blits are automatically clipped to the edges of the source and
|
|
* destination surfaces.
|
|
*
|
|
* \param surface the SDL_Surface structure to be clipped
|
|
* \param rect the SDL_Rect structure representing the clipping rectangle, or
|
|
* NULL to disable clipping
|
|
* \returns SDL_TRUE if the rectangle intersects the surface, otherwise
|
|
* SDL_FALSE and blits will be completely clipped.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_GetSurfaceClipRect
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_SetSurfaceClipRect(SDL_Surface *surface, const SDL_Rect *rect);
|
|
|
|
/**
|
|
* Get the clipping rectangle for a surface.
|
|
*
|
|
* When `surface` is the destination of a blit, only the area within the clip
|
|
* rectangle is drawn into.
|
|
*
|
|
* \param surface the SDL_Surface structure representing the surface to be
|
|
* clipped
|
|
* \param rect an SDL_Rect structure filled in with the clipping rectangle for
|
|
* the surface
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_SetSurfaceClipRect
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_GetSurfaceClipRect(SDL_Surface *surface, SDL_Rect *rect);
|
|
|
|
/*
|
|
* Flip a surface vertically or horizontally.
|
|
*
|
|
* \param surface the surface to flip
|
|
* \param flip the direction to flip
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_FlipSurface(SDL_Surface *surface, SDL_FlipMode flip);
|
|
|
|
/*
|
|
* Creates a new surface identical to the existing surface.
|
|
*
|
|
* The returned surface should be freed with SDL_DestroySurface().
|
|
*
|
|
* \param surface the surface to duplicate.
|
|
* \returns a copy of the surface, or NULL on failure; call SDL_GetError() for
|
|
* more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_DestroySurface
|
|
*/
|
|
extern DECLSPEC SDL_Surface *SDLCALL SDL_DuplicateSurface(SDL_Surface *surface);
|
|
|
|
/**
|
|
* Copy an existing surface to a new surface of the specified format.
|
|
*
|
|
* This function is used to optimize images for faster *repeat* blitting. This
|
|
* is accomplished by converting the original and storing the result as a new
|
|
* surface. The new, optimized surface can then be used as the source for
|
|
* future blits, making them faster.
|
|
*
|
|
* \param surface the existing SDL_Surface structure to convert
|
|
* \param format the SDL_PixelFormat structure that the new surface is
|
|
* optimized for
|
|
* \returns the new SDL_Surface structure that is created or NULL if it fails;
|
|
* call SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_ConvertSurfaceFormat
|
|
* \sa SDL_ConvertSurfaceFormatAndColorspace
|
|
* \sa SDL_CreatePixelFormat
|
|
* \sa SDL_DestroySurface
|
|
*/
|
|
extern DECLSPEC SDL_Surface *SDLCALL SDL_ConvertSurface(SDL_Surface *surface, const SDL_PixelFormat *format);
|
|
|
|
/**
|
|
* Copy an existing surface to a new surface of the specified format.
|
|
*
|
|
* This function operates just like SDL_ConvertSurface(), but accepts an
|
|
* SDL_PixelFormatEnum value instead of an SDL_PixelFormat structure. As such,
|
|
* it might be easier to call but it doesn't have access to palette
|
|
* information for the destination surface, in case that would be important.
|
|
*
|
|
* \param surface the existing SDL_Surface structure to convert
|
|
* \param pixel_format the new pixel format
|
|
* \returns the new SDL_Surface structure that is created or NULL if it fails;
|
|
* call SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_ConvertSurface
|
|
* \sa SDL_ConvertSurfaceFormatAndColorspace
|
|
* \sa SDL_DestroySurface
|
|
*/
|
|
extern DECLSPEC SDL_Surface *SDLCALL SDL_ConvertSurfaceFormat(SDL_Surface *surface, SDL_PixelFormatEnum pixel_format);
|
|
|
|
/**
|
|
* Copy an existing surface to a new surface of the specified format and
|
|
* colorspace.
|
|
*
|
|
* This function converts an existing surface to a new format and colorspace
|
|
* and returns the new surface. This will perform any pixel format and
|
|
* colorspace conversion needed.
|
|
*
|
|
* \param surface the existing SDL_Surface structure to convert
|
|
* \param pixel_format the new pixel format
|
|
* \param colorspace the new colorspace
|
|
* \param props an SDL_PropertiesID with additional color properties, or 0
|
|
* \returns the new SDL_Surface structure that is created or NULL if it fails;
|
|
* call SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_ConvertSurface
|
|
* \sa SDL_ConvertSurfaceFormat
|
|
* \sa SDL_DestroySurface
|
|
*/
|
|
extern DECLSPEC SDL_Surface *SDLCALL SDL_ConvertSurfaceFormatAndColorspace(SDL_Surface *surface, SDL_PixelFormatEnum pixel_format, SDL_Colorspace colorspace, SDL_PropertiesID props);
|
|
|
|
/**
|
|
* Copy a block of pixels of one format to another format.
|
|
*
|
|
* \param width the width of the block to copy, in pixels
|
|
* \param height the height of the block to copy, in pixels
|
|
* \param src_format an SDL_PixelFormatEnum value of the `src` pixels format
|
|
* \param src a pointer to the source pixels
|
|
* \param src_pitch the pitch of the source pixels, in bytes
|
|
* \param dst_format an SDL_PixelFormatEnum value of the `dst` pixels format
|
|
* \param dst a pointer to be filled in with new pixel data
|
|
* \param dst_pitch the pitch of the destination pixels, in bytes
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_ConvertPixelsAndColorspace
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_ConvertPixels(int width, int height, SDL_PixelFormatEnum src_format, const void *src, int src_pitch, SDL_PixelFormatEnum dst_format, void *dst, int dst_pitch);
|
|
|
|
/**
|
|
* Copy a block of pixels of one format and colorspace to another format and
|
|
* colorspace.
|
|
*
|
|
* \param width the width of the block to copy, in pixels
|
|
* \param height the height of the block to copy, in pixels
|
|
* \param src_format an SDL_PixelFormatEnum value of the `src` pixels format
|
|
* \param src_colorspace an SDL_ColorSpace value describing the colorspace of
|
|
* the `src` pixels
|
|
* \param src_properties an SDL_PropertiesID with additional source color
|
|
* properties, or 0
|
|
* \param src a pointer to the source pixels
|
|
* \param src_pitch the pitch of the source pixels, in bytes
|
|
* \param dst_format an SDL_PixelFormatEnum value of the `dst` pixels format
|
|
* \param dst_colorspace an SDL_ColorSpace value describing the colorspace of
|
|
* the `dst` pixels
|
|
* \param dst_properties an SDL_PropertiesID with additional destination color
|
|
* properties, or 0
|
|
* \param dst a pointer to be filled in with new pixel data
|
|
* \param dst_pitch the pitch of the destination pixels, in bytes
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_ConvertPixels
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_ConvertPixelsAndColorspace(int width, int height, SDL_PixelFormatEnum src_format, SDL_Colorspace src_colorspace, SDL_PropertiesID src_properties, const void *src, int src_pitch, SDL_PixelFormatEnum dst_format, SDL_Colorspace dst_colorspace, SDL_PropertiesID dst_properties, void *dst, int dst_pitch);
|
|
|
|
/**
|
|
* Premultiply the alpha on a block of pixels.
|
|
*
|
|
* This is safe to use with src == dst, but not for other overlapping areas.
|
|
*
|
|
* This function is currently only implemented for SDL_PIXELFORMAT_ARGB8888.
|
|
*
|
|
* \param width the width of the block to convert, in pixels
|
|
* \param height the height of the block to convert, in pixels
|
|
* \param src_format an SDL_PixelFormatEnum value of the `src` pixels format
|
|
* \param src a pointer to the source pixels
|
|
* \param src_pitch the pitch of the source pixels, in bytes
|
|
* \param dst_format an SDL_PixelFormatEnum value of the `dst` pixels format
|
|
* \param dst a pointer to be filled in with premultiplied pixel data
|
|
* \param dst_pitch the pitch of the destination pixels, in bytes
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_PremultiplyAlpha(int width, int height, SDL_PixelFormatEnum src_format, const void *src, int src_pitch, SDL_PixelFormatEnum dst_format, void *dst, int dst_pitch);
|
|
|
|
/**
|
|
* Perform a fast fill of a rectangle with a specific color.
|
|
*
|
|
* `color` should be a pixel of the format used by the surface, and can be
|
|
* generated by SDL_MapRGB() or SDL_MapRGBA(). If the color value contains an
|
|
* alpha component then the destination is simply filled with that alpha
|
|
* information, no blending takes place.
|
|
*
|
|
* If there is a clip rectangle set on the destination (set via
|
|
* SDL_SetSurfaceClipRect()), then this function will fill based on the
|
|
* intersection of the clip rectangle and `rect`.
|
|
*
|
|
* \param dst the SDL_Surface structure that is the drawing target
|
|
* \param rect the SDL_Rect structure representing the rectangle to fill, or
|
|
* NULL to fill the entire surface
|
|
* \param color the color to fill with
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_FillSurfaceRects
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_FillSurfaceRect(SDL_Surface *dst, const SDL_Rect *rect, Uint32 color);
|
|
|
|
/**
|
|
* Perform a fast fill of a set of rectangles with a specific color.
|
|
*
|
|
* `color` should be a pixel of the format used by the surface, and can be
|
|
* generated by SDL_MapRGB() or SDL_MapRGBA(). If the color value contains an
|
|
* alpha component then the destination is simply filled with that alpha
|
|
* information, no blending takes place.
|
|
*
|
|
* If there is a clip rectangle set on the destination (set via
|
|
* SDL_SetSurfaceClipRect()), then this function will fill based on the
|
|
* intersection of the clip rectangle and `rect`.
|
|
*
|
|
* \param dst the SDL_Surface structure that is the drawing target
|
|
* \param rects an array of SDL_Rects representing the rectangles to fill.
|
|
* \param count the number of rectangles in the array
|
|
* \param color the color to fill with
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_FillSurfaceRect
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_FillSurfaceRects(SDL_Surface *dst, const SDL_Rect *rects, int count, Uint32 color);
|
|
|
|
/**
|
|
* Performs a fast blit from the source surface to the destination surface.
|
|
*
|
|
* This assumes that the source and destination rectangles are the same size.
|
|
* If either `srcrect` or `dstrect` are NULL, the entire surface (`src` or
|
|
* `dst`) is copied. The final blit rectangles are saved in `srcrect` and
|
|
* `dstrect` after all clipping is performed.
|
|
*
|
|
* The blit function should not be called on a locked surface.
|
|
*
|
|
* The blit semantics for surfaces with and without blending and colorkey are
|
|
* defined as follows:
|
|
*
|
|
* ```c
|
|
* RGBA->RGB:
|
|
* Source surface blend mode set to SDL_BLENDMODE_BLEND:
|
|
* alpha-blend (using the source alpha-channel and per-surface alpha)
|
|
* SDL_SRCCOLORKEY ignored.
|
|
* Source surface blend mode set to SDL_BLENDMODE_NONE:
|
|
* copy RGB.
|
|
* if SDL_SRCCOLORKEY set, only copy the pixels matching the
|
|
* RGB values of the source color key, ignoring alpha in the
|
|
* comparison.
|
|
*
|
|
* RGB->RGBA:
|
|
* Source surface blend mode set to SDL_BLENDMODE_BLEND:
|
|
* alpha-blend (using the source per-surface alpha)
|
|
* Source surface blend mode set to SDL_BLENDMODE_NONE:
|
|
* copy RGB, set destination alpha to source per-surface alpha value.
|
|
* both:
|
|
* if SDL_SRCCOLORKEY set, only copy the pixels matching the
|
|
* source color key.
|
|
*
|
|
* RGBA->RGBA:
|
|
* Source surface blend mode set to SDL_BLENDMODE_BLEND:
|
|
* alpha-blend (using the source alpha-channel and per-surface alpha)
|
|
* SDL_SRCCOLORKEY ignored.
|
|
* Source surface blend mode set to SDL_BLENDMODE_NONE:
|
|
* copy all of RGBA to the destination.
|
|
* if SDL_SRCCOLORKEY set, only copy the pixels matching the
|
|
* RGB values of the source color key, ignoring alpha in the
|
|
* comparison.
|
|
*
|
|
* RGB->RGB:
|
|
* Source surface blend mode set to SDL_BLENDMODE_BLEND:
|
|
* alpha-blend (using the source per-surface alpha)
|
|
* Source surface blend mode set to SDL_BLENDMODE_NONE:
|
|
* copy RGB.
|
|
* both:
|
|
* if SDL_SRCCOLORKEY set, only copy the pixels matching the
|
|
* source color key.
|
|
* ```
|
|
*
|
|
* \param src the SDL_Surface structure to be copied from
|
|
* \param srcrect the SDL_Rect structure representing the rectangle to be
|
|
* copied, or NULL to copy the entire surface
|
|
* \param dst the SDL_Surface structure that is the blit target
|
|
* \param dstrect the SDL_Rect structure representing the x and y position in
|
|
* the destination surface. On input the width and height are
|
|
* ignored (taken from srcrect), and on output this is filled
|
|
* in with the actual rectangle used after clipping.
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_BlitSurfaceScaled
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_BlitSurface(SDL_Surface *src, const SDL_Rect *srcrect, SDL_Surface *dst, SDL_Rect *dstrect);
|
|
|
|
/**
|
|
* Perform low-level surface blitting only.
|
|
*
|
|
* This is a semi-private blit function and it performs low-level surface
|
|
* blitting, assuming the input rectangles have already been clipped.
|
|
*
|
|
* \param src the SDL_Surface structure to be copied from
|
|
* \param srcrect the SDL_Rect structure representing the rectangle to be
|
|
* copied, or NULL to copy the entire surface
|
|
* \param dst the SDL_Surface structure that is the blit target
|
|
* \param dstrect the SDL_Rect structure representing the target rectangle in
|
|
* the destination surface
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_BlitSurface
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*/
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extern DECLSPEC int SDLCALL SDL_BlitSurfaceUnchecked(SDL_Surface *src, const SDL_Rect *srcrect, SDL_Surface *dst, const SDL_Rect *dstrect);
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|
|
|
/**
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|
* Perform stretch blit between two surfaces of the same format.
|
|
*
|
|
* Using SDL_SCALEMODE_NEAREST: fast, low quality. Using SDL_SCALEMODE_LINEAR:
|
|
* bilinear scaling, slower, better quality, only 32BPP.
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|
*
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|
* \param src the SDL_Surface structure to be copied from
|
|
* \param srcrect the SDL_Rect structure representing the rectangle to be
|
|
* copied
|
|
* \param dst the SDL_Surface structure that is the blit target
|
|
* \param dstrect the SDL_Rect structure representing the target rectangle in
|
|
* the destination surface
|
|
* \param scaleMode scale algorithm to be used
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|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
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|
*
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|
* \sa SDL_BlitSurfaceScaled
|
|
*/
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|
extern DECLSPEC int SDLCALL SDL_SoftStretch(SDL_Surface *src, const SDL_Rect *srcrect, SDL_Surface *dst, const SDL_Rect *dstrect, SDL_ScaleMode scaleMode);
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|
|
|
/**
|
|
* Perform a scaled blit to a destination surface, which may be of a different
|
|
* format.
|
|
*
|
|
* \param src the SDL_Surface structure to be copied from
|
|
* \param srcrect the SDL_Rect structure representing the rectangle to be
|
|
* copied
|
|
* \param dst the SDL_Surface structure that is the blit target
|
|
* \param dstrect the SDL_Rect structure representing the target rectangle in
|
|
* the destination surface, filled with the actual rectangle
|
|
* used after clipping
|
|
* \param scaleMode scale algorithm to be used
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_BlitSurface
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_BlitSurfaceScaled(SDL_Surface *src, const SDL_Rect *srcrect, SDL_Surface *dst, SDL_Rect *dstrect, SDL_ScaleMode scaleMode);
|
|
|
|
/**
|
|
* Perform low-level surface scaled blitting only.
|
|
*
|
|
* This is a semi-private function and it performs low-level surface blitting,
|
|
* assuming the input rectangles have already been clipped.
|
|
*
|
|
* \param src the SDL_Surface structure to be copied from
|
|
* \param srcrect the SDL_Rect structure representing the rectangle to be
|
|
* copied
|
|
* \param dst the SDL_Surface structure that is the blit target
|
|
* \param dstrect the SDL_Rect structure representing the target rectangle in
|
|
* the destination surface
|
|
* \param scaleMode scale algorithm to be used
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_BlitSurfaceScaled
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_BlitSurfaceUncheckedScaled(SDL_Surface *src, const SDL_Rect *srcrect, SDL_Surface *dst, const SDL_Rect *dstrect, SDL_ScaleMode scaleMode);
|
|
|
|
/**
|
|
* Retrieves a single pixel from a surface.
|
|
*
|
|
* This function prioritizes correctness over speed: it is suitable for unit
|
|
* tests, but is not intended for use in a game engine.
|
|
*
|
|
* Like SDL_GetRGBA, this uses the entire 0..255 range when converting color
|
|
* components from pixel formats with less than 8 bits per RGB component.
|
|
*
|
|
* \param surface the surface to read
|
|
* \param x the horizontal coordinate, 0 <= x < width
|
|
* \param y the vertical coordinate, 0 <= y < height
|
|
* \param r a pointer filled in with the red channel, 0-255, or NULL to ignore
|
|
* this channel
|
|
* \param g a pointer filled in with the green channel, 0-255, or NULL to
|
|
* ignore this channel
|
|
* \param b a pointer filled in with the blue channel, 0-255, or NULL to
|
|
* ignore this channel
|
|
* \param a a pointer filled in with the alpha channel, 0-255, or NULL to
|
|
* ignore this channel
|
|
* \returns 0 on success or a negative error code on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_ReadSurfacePixel(SDL_Surface *surface, int x, int y, Uint8 *r, Uint8 *g, Uint8 *b, Uint8 *a);
|
|
|
|
/* Ends C function definitions when using C++ */
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#include <SDL3/SDL_close_code.h>
|
|
|
|
#endif /* SDL_surface_h_ */
|