2 Simple DirectMedia Layer
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16 appreciated but is not required.
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25 #include "SDL_stdinc.h"
26 #include "SDL_pixels.h"
28 #include "SDL_surface.h"
29 #include "SDL_video.h"
31 #include "begin_code.h"
32 /* Set up for C function definitions, even when using C++ */
39 * Header file for the shaped window API.
42 #define SDL_NONSHAPEABLE_WINDOW -1
43 #define SDL_INVALID_SHAPE_ARGUMENT -2
44 #define SDL_WINDOW_LACKS_SHAPE -3
47 * \brief Create a window that can be shaped with the specified position, dimensions, and flags.
49 * \param title The title of the window, in UTF-8 encoding.
50 * \param x The x position of the window, ::SDL_WINDOWPOS_CENTERED, or
51 * ::SDL_WINDOWPOS_UNDEFINED.
52 * \param y The y position of the window, ::SDL_WINDOWPOS_CENTERED, or
53 * ::SDL_WINDOWPOS_UNDEFINED.
54 * \param w The width of the window.
55 * \param h The height of the window.
56 * \param flags The flags for the window, a mask of SDL_WINDOW_BORDERLESS with any of the following:
57 * ::SDL_WINDOW_OPENGL, ::SDL_WINDOW_INPUT_GRABBED,
58 * ::SDL_WINDOW_HIDDEN, ::SDL_WINDOW_RESIZABLE,
59 * ::SDL_WINDOW_MAXIMIZED, ::SDL_WINDOW_MINIMIZED,
60 * ::SDL_WINDOW_BORDERLESS is always set, and ::SDL_WINDOW_FULLSCREEN is always unset.
62 * \return The window created, or NULL if window creation failed.
64 * \sa SDL_DestroyWindow()
66 extern DECLSPEC SDL_Window * SDLCALL SDL_CreateShapedWindow(const char *title,unsigned int x,unsigned int y,unsigned int w,unsigned int h,Uint32 flags);
69 * \brief Return whether the given window is a shaped window.
71 * \param window The window to query for being shaped.
73 * \return SDL_TRUE if the window is a window that can be shaped, SDL_FALSE if the window is unshaped or NULL.
74 * \sa SDL_CreateShapedWindow
76 extern DECLSPEC SDL_bool SDLCALL SDL_IsShapedWindow(const SDL_Window *window);
78 /** \brief An enum denoting the specific type of contents present in an SDL_WindowShapeParams union. */
80 /** \brief The default mode, a binarized alpha cutoff of 1. */
82 /** \brief A binarized alpha cutoff with a given integer value. */
83 ShapeModeBinarizeAlpha,
84 /** \brief A binarized alpha cutoff with a given integer value, but with the opposite comparison. */
85 ShapeModeReverseBinarizeAlpha,
86 /** \brief A color key is applied. */
90 #define SDL_SHAPEMODEALPHA(mode) (mode == ShapeModeDefault || mode == ShapeModeBinarizeAlpha || mode == ShapeModeReverseBinarizeAlpha)
92 /** \brief A union containing parameters for shaped windows. */
94 /** \brief a cutoff alpha value for binarization of the window shape's alpha channel. */
95 Uint8 binarizationCutoff;
97 } SDL_WindowShapeParams;
99 /** \brief A struct that tags the SDL_WindowShapeParams union with an enum describing the type of its contents. */
100 typedef struct SDL_WindowShapeMode {
101 /** \brief The mode of these window-shape parameters. */
102 WindowShapeMode mode;
103 /** \brief Window-shape parameters. */
104 SDL_WindowShapeParams parameters;
105 } SDL_WindowShapeMode;
108 * \brief Set the shape and parameters of a shaped window.
110 * \param window The shaped window whose parameters should be set.
111 * \param shape A surface encoding the desired shape for the window.
112 * \param shape_mode The parameters to set for the shaped window.
114 * \return 0 on success, SDL_INVALID_SHAPE_ARGUMENT on invalid an invalid shape argument, or SDL_NONSHAPEABLE_WINDOW
115 * if the SDL_Window* given does not reference a valid shaped window.
117 * \sa SDL_WindowShapeMode
118 * \sa SDL_GetShapedWindowMode.
120 extern DECLSPEC int SDLCALL SDL_SetWindowShape(SDL_Window *window,SDL_Surface *shape,SDL_WindowShapeMode *shape_mode);
123 * \brief Get the shape parameters of a shaped window.
125 * \param window The shaped window whose parameters should be retrieved.
126 * \param shape_mode An empty shape-mode structure to fill, or NULL to check whether the window has a shape.
128 * \return 0 if the window has a shape and, provided shape_mode was not NULL, shape_mode has been filled with the mode
129 * data, SDL_NONSHAPEABLE_WINDOW if the SDL_Window given is not a shaped window, or SDL_WINDOW_LACKS_SHAPE if
130 * the SDL_Window* given is a shapeable window currently lacking a shape.
132 * \sa SDL_WindowShapeMode
133 * \sa SDL_SetWindowShape
135 extern DECLSPEC int SDLCALL SDL_GetShapedWindowMode(SDL_Window *window,SDL_WindowShapeMode *shape_mode);
137 /* Ends C function definitions when using C++ */
141 #include "close_code.h"
143 #endif /* _SDL_shape_h */