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148 lines
5.5 KiB
C
Executable File
148 lines
5.5 KiB
C
Executable File
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2021 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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#ifndef SDL_shape_h_
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#define SDL_shape_h_
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#include "SDL_stdinc.h"
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#include "SDL_pixels.h"
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#include "SDL_rect.h"
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#include "SDL_surface.h"
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#include "SDL_video.h"
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#include "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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/** \file SDL_shape.h
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*
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* Header file for the shaped window API.
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*/
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#define SDL_NONSHAPEABLE_WINDOW -1
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#define SDL_INVALID_SHAPE_ARGUMENT -2
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#define SDL_WINDOW_LACKS_SHAPE -3
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/**
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* Create a window that can be shaped with the specified position, dimensions,
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* and flags.
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*
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* \param title The title of the window, in UTF-8 encoding.
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* \param x The x position of the window, ::SDL_WINDOWPOS_CENTERED, or
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* ::SDL_WINDOWPOS_UNDEFINED.
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* \param y The y position of the window, ::SDL_WINDOWPOS_CENTERED, or
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* ::SDL_WINDOWPOS_UNDEFINED.
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* \param w The width of the window.
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* \param h The height of the window.
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* \param flags The flags for the window, a mask of SDL_WINDOW_BORDERLESS with
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* any of the following: ::SDL_WINDOW_OPENGL,
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* ::SDL_WINDOW_INPUT_GRABBED, ::SDL_WINDOW_HIDDEN,
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* ::SDL_WINDOW_RESIZABLE, ::SDL_WINDOW_MAXIMIZED,
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* ::SDL_WINDOW_MINIMIZED, ::SDL_WINDOW_BORDERLESS is always set,
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* and ::SDL_WINDOW_FULLSCREEN is always unset.
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* \return the window created, or NULL if window creation failed.
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*
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* \sa SDL_DestroyWindow
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*/
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extern DECLSPEC SDL_Window * SDLCALL SDL_CreateShapedWindow(const char *title,unsigned int x,unsigned int y,unsigned int w,unsigned int h,Uint32 flags);
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/**
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* Return whether the given window is a shaped window.
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*
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* \param window The window to query for being shaped.
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* \return SDL_TRUE if the window is a window that can be shaped, SDL_FALSE if
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* the window is unshaped or NULL.
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*
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* \sa SDL_CreateShapedWindow
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*/
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extern DECLSPEC SDL_bool SDLCALL SDL_IsShapedWindow(const SDL_Window *window);
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/** \brief An enum denoting the specific type of contents present in an SDL_WindowShapeParams union. */
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typedef enum {
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/** \brief The default mode, a binarized alpha cutoff of 1. */
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ShapeModeDefault,
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/** \brief A binarized alpha cutoff with a given integer value. */
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ShapeModeBinarizeAlpha,
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/** \brief A binarized alpha cutoff with a given integer value, but with the opposite comparison. */
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ShapeModeReverseBinarizeAlpha,
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/** \brief A color key is applied. */
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ShapeModeColorKey
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} WindowShapeMode;
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#define SDL_SHAPEMODEALPHA(mode) (mode == ShapeModeDefault || mode == ShapeModeBinarizeAlpha || mode == ShapeModeReverseBinarizeAlpha)
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/** \brief A union containing parameters for shaped windows. */
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typedef union {
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/** \brief A cutoff alpha value for binarization of the window shape's alpha channel. */
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Uint8 binarizationCutoff;
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SDL_Color colorKey;
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} SDL_WindowShapeParams;
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/** \brief A struct that tags the SDL_WindowShapeParams union with an enum describing the type of its contents. */
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typedef struct SDL_WindowShapeMode {
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/** \brief The mode of these window-shape parameters. */
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WindowShapeMode mode;
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/** \brief Window-shape parameters. */
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SDL_WindowShapeParams parameters;
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} SDL_WindowShapeMode;
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/**
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* Set the shape and parameters of a shaped window.
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*
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* \param window The shaped window whose parameters should be set.
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* \param shape A surface encoding the desired shape for the window.
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* \param shape_mode The parameters to set for the shaped window.
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* \return 0 on success, SDL_INVALID_SHAPE_ARGUMENT on an invalid shape
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* argument, or SDL_NONSHAPEABLE_WINDOW if the SDL_Window given does
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* not reference a valid shaped window.
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*
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* \sa SDL_WindowShapeMode
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* \sa SDL_GetShapedWindowMode
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*/
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extern DECLSPEC int SDLCALL SDL_SetWindowShape(SDL_Window *window,SDL_Surface *shape,SDL_WindowShapeMode *shape_mode);
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/**
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* Get the shape parameters of a shaped window.
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*
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* \param window The shaped window whose parameters should be retrieved.
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* \param shape_mode An empty shape-mode structure to fill, or NULL to check
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* whether the window has a shape.
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* \return 0 if the window has a shape and, provided shape_mode was not NULL,
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* shape_mode has been filled with the mode data,
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* SDL_NONSHAPEABLE_WINDOW if the SDL_Window given is not a shaped
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* window, or SDL_WINDOW_LACKS_SHAPE if the SDL_Window given is a
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* shapeable window currently lacking a shape.
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*
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* \sa SDL_WindowShapeMode
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* \sa SDL_SetWindowShape
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*/
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extern DECLSPEC int SDLCALL SDL_GetShapedWindowMode(SDL_Window *window,SDL_WindowShapeMode *shape_mode);
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/* Ends C function definitions when using C++ */
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#ifdef __cplusplus
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}
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#endif
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#include "close_code.h"
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#endif /* SDL_shape_h_ */
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