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ugfx/src/gwin/sys_defs.h

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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
/**
* @file src/gwin/sys_defs.h
*
* @defgroup Window Window
* @ingroup Windows
*
* @details GWIN provides a basic window manager which allows it to easily
* create and destroy different windows at runtime. Each window
* will have it's own properties such as colors as well as
* it's own drawing origin.
*
* @pre GFX_USE_GWIN must be set to TRUE in your gfxconf.h
* @{
*/
#ifndef _GWIN_H
#define _GWIN_H
#include "gfx.h"
#if GFX_USE_GWIN || defined(__DOXYGEN__)
/* Forward declaration */
typedef struct GWindowObject *GHandle;
/**
* @brief A window object structure
* @note Do not access the members directly. Treat it as a black-box and use the method functions.
* @{
*/
typedef struct GWindowObject {
#if GWIN_NEED_WINDOWMANAGER
// This MUST be the first member of the structure
gfxQueueASyncItem wmq; // @< The next window (for the window manager)
#endif
const struct gwinVMT *vmt; // @< The VMT for this GWIN
GDisplay * display; // @< The display this window is on.
coord_t x, y; // @< Screen relative position
coord_t width, height; // @< Dimensions of this window
color_t color, bgcolor; // @< The current drawing colors
uint32_t flags; // @< Window flags (the meaning is private to the GWIN class)
#if GDISP_NEED_TEXT
font_t font; // @< The current font
#endif
#if GWIN_NEED_CONTAINERS
GHandle parent; // @< The parent window
#endif
} GWindowObject, * GHandle;
/** @} */
/**
* @brief The structure to initialise a GWIN.
*
* @note Some gwin's will need extra parameters.
* @note The dimensions and position may be changed to fit on the real screen.
* @note If you create this structure on the stack, you should always memset
* it to all zero's first in case a future version of the software
* add's extra fields. Alternatively you can use @p gwinClearInit()
* to clear it.
*
* @{
*/
typedef struct GWindowInit {
coord_t x, y; // @< The initial position relative to its parent
coord_t width, height; // @< The initial dimension
bool_t show; // @< Should the window be visible initially
#if GWIN_NEED_CONTAINERS
GHandle parent; // @< The parent - must be a container or NULL
#endif
} GWindowInit;
/** @} */
/**
* @brief A window's minimized, maximized or normal size
*/
typedef enum { GWIN_NORMAL, GWIN_MAXIMIZE, GWIN_MINIMIZE } GWindowMinMax;
#ifdef __cplusplus
extern "C" {
#endif
/*-------------------------------------------------
* Window Manager functions
*-------------------------------------------------*/
#if GWIN_NEED_WINDOWMANAGER || defined(__DOXYGEN__)
// Forward definition
struct GWindowManager;
/**
* @brief Set the window manager for the GWIN system.
*
* @param[in] gwm The window manager to use. Can be NULL to turn off the existing window manager.
*
* @note A window manager is responsible for handling when window visibility is changed or
* a window is resized for moved. Note that only saved window states will be redrawn. Each
* window type can save different information (or none at all). See the documentation on each window
* type to see which information it saves (and can therefore be automatically redrawn).
* For window types that do not save any state information, the window manager determines what to do.
* Generally it will just clear the window to its background color.
*
* @api
*/
void gwinSetWindowManager(struct GWindowManager *gwm);
#endif
/*-------------------------------------------------
* Functions that affect all windows
*-------------------------------------------------*/
/**
* @brief Clear a GWindowInit structure to all zero's
* @note This function is provided just to prevent problems
* on operating systems where using memset() causes issues
* in the users application.
*
* @param[in] pwi The GWindowInit structure to clear
*
* @api
*/
void gwinClearInit(GWindowInit *pwi);
/**
* @brief Set the default foreground color for all new GWIN windows
*
* @param[in] clr The color to be set
*
* @api
*/
void gwinSetDefaultColor(color_t clr);
/**
* @brief Get the default foreground color for all new GWIN windows
*
* @return The current default color for all new GWIN windows
*
* @api
*/
color_t gwinGetDefaultColor(void);
/**
* @brief Set the default background color for all new GWIN windows
*
* @param[in] bgclr The background color
*
* @api
*/
void gwinSetDefaultBgColor(color_t bgclr);
/**
* @brief Get the default background color for all new GWIN windows
*
* @return The current default background color for all new GWIN windows
*
* @api
*/
color_t gwinGetDefaultBgColor(void);
#if GDISP_NEED_TEXT || defined(__DOXYGEN__)
/**
* @brief Set the default font for all new GWIN windows
*
* @param[in] font The new font to be set
*
* @api
*/
void gwinSetDefaultFont(font_t font);
/**
* @brief Get the current default font
*
* @return The current default font
*
* @api
*/
font_t gwinGetDefaultFont(void);
#endif
/*-------------------------------------------------
* Base functions
*-------------------------------------------------*/
/**
* @brief Create a basic window.
* @return NULL if there is no resultant drawing area, otherwise a window handle.
*
* @param[in] g The GDisplay to display this window on
* @param[in] pgw The window structure to initialize. If this is NULL the structure is dynamically allocated.
* @param[in] pInit How to initialise the window
*
* @note The drawing color and the background color get set to the current defaults. If you haven't called
* @p gwinSetDefaultColor() or @p gwinSetDefaultBgColor() then these are White and Black respectively.
* @note The font gets set to the current default font. If you haven't called @p gwinSetDefaultFont() then there
* is no default font and text drawing operations will no nothing.
* @note A basic window does not save the drawing state. It is not automatically redrawn if the window is moved or
* its visibility state is changed.
*
* @api
*/
GHandle gwinGWindowCreate(GDisplay *g, GWindowObject *pgw, const GWindowInit *pInit);
#define gwinWindowCreate(pgw, pInit) gwinGWindowCreate(GDISP, pgw, pInit);
/**
* @brief Destroy a window (of any type). Releases any dynamically allocated memory.
*
* @param[in] gh The window handle
*
* @api
*/
void gwinDestroy(GHandle gh);
/**
* @brief Get the real class name of the GHandle
* @details Returns a string describing the object class.
*
* @param[in] gh The window
*
* @return A string describing the object class.
*
* @api
*/
const char* gwinGetClassName(GHandle gh);
/**
* @brief Get an ID that uniquely describes the class of the GHandle
*
* @param[in] gh The window
*
* @api
*/
#define gwinGetClassID(gh) ((void *)((gh)->vmt))
/**
* @brief Get the X coordinate of the window
* @details Returns the X coordinate of the origin of the window.
* The coordinate is relative to the physical screen zero point.
*
* @param[in] gh The window
*
* @api
*/
#define gwinGetScreenX(gh) ((gh)->x)
/**
* @brief Get the Y coordinate of the window
* @details Returns the Y coordinate of the origin of the window.
* The coordinate is relative to the physical screen zero point.
*
* @param[in] gh The window
*
* @api
*/
#define gwinGetScreenY(gh) ((gh)->y)
/**
* @brief Get the width of the window
*
* @param[in] gh The window
*
* @api
*/
#define gwinGetWidth(gh) ((gh)->width)
/**
* @brief Get the height of the window
*
* @param[in] gh The window
*
* @api
*/
#define gwinGetHeight(gh) ((gh)->height)
/**
* @brief Set foreground color
* @details Set the color which will be used to draw
*
* @param[in] gh The window
* @param[in] clr The color to be set
*
* @api
*/
#define gwinSetColor(gh, clr) (gh)->color = (clr)
/**
* @brief Set background color
* @details Set the color which will be used as background
* @note gwinClear() must be called to set the background color
*
* @param[in] gh The window
* @param[in] bgclr The background color
*
* @api
*/
#define gwinSetBgColor(gh, bgclr) (gh)->bgcolor = (bgclr)
/**
* @brief Get the foreground color of a window
*
* @param[in] gh The window
*
* @api
*/
#define gwinGetColor(gh) (gh)->color
/**
* @brief Get the background color of a window
*
* @param[in] gh The window
*
* @api
*/
#define gwinGetBgColor(gh) (gh)->bgcolor
/**
* @brief Sets whether a window is visible or not
*
* @param[in] gh The window
* @param[in] visible Whether the window should be visible or not
*
* @note When a window is marked as not visible, drawing operations
* on the window do nothing.
* @note When a window is marked as visible, it is not automatically
* redrawn as many window types don't remember their drawing state.
* Widgets such as Buttons, Sliders etc will be redrawn.
* @note If there is no window manager in use, when a window is marked
* as not visible, nothing is done to remove the window from the screen.
* When there is a window manager, it is up to the window manager to
* handle what happens.
* @note Even when you mark a window as visible, it may still not be displayed
* if it's parent is invisible. When the parent becomes visible this child
* will automatically be shown because it is already marked as visible.
*
* @api
*/
void gwinSetVisible(GHandle gh, bool_t visible);
/**
* @brief Makes a widget become visible
*
* @param[in] gh The window handle
*
* @api
*/
#define gwinShow(gh) gwinSetVisible(gh, TRUE);
/**
* @brief Makes a widget become invisible
*
* @param[in] gh The window handle
*
* @api
*/
#define gwinHide(gh) gwinSetVisible(gh, FALSE);
/**
* @brief Gets the visibility of a window
* @return TRUE if visible
*
* @note It is possible for a child to be marked as visible by @p gwinSetVisible()
* but for this call to return FALSE if one of its parents are not visible.
*
* @param[in] gh The window
*
* @api
*/
bool_t gwinGetVisible(GHandle gh);
/**
* @brief Enable or disable a window
*
* @param[in] gh The window handle
* @param[in] enabled Enable or disable the window
*
* @note The window is automatically redrawn if it supports self-redrawing.
* @note Even when you mark a window as enabled, it may still remain disabled
* if it's parent is disabled. When the parent becomes enabled this child
* will automatically be enabled because it is already marked as enabled.
*
* @api
*/
void gwinSetEnabled(GHandle gh, bool_t enabled);
/**
* @brief Enables a widget
*
* @param[in] gh The window handle
*
* @api
*/
#define gwinEnable(gh) gwinSetEnabled(gh, TRUE);
/**
* @brief Disables a widget
*
* @param[in] gh The window handle
*
* @api
*/
#define gwinDisable(gh) gwinSetEnabled(gh, FALSE);
/**
* @brief Gets the enabled state of a window
* @return TRUE if enabled
*
* @note It is possible for a child to be marked as enabled by @p gwinSetEnabled()
* but for this call to return FALSE if one of its parents are not enabled.
*
* @param[in] gh The window
*
* @api
*/
bool_t gwinGetEnabled(GHandle gh);
/**
* @brief Move a window
*
* @param[in] gh The window
* @param[in] x, y The new position (screen relative) for this window
*
* @note The final window position may not be the requested position. Windows
* are clipped to the screen area and the window manager may also affect the position.
* @note The window is redrawn if it is visible. See the comments in @p gwinSetVisible()
* with regard to what can be redrawn and what can't.
* @note It is up to the window manager to determine what happens with the screen area
* uncovered by moving the window. When there is no window manager, nothing
* is done with the uncovered area.
*
* @api
*/
void gwinMove(GHandle gh, coord_t x, coord_t y);
/**
* @brief Resize a window
*
* @param[in] gh The window
* @param[in] width, height The new size of the window
*
* @note The final window size may not be the requested size. Windows
* are clipped to the screen area and the window manager may also affect the size.
* @note The window is redrawn if it is visible. See the comments in @p gwinSetVisible()
* with regard to what can be redrawn and what can't.
* @note It is up to the window manager to determine what happens with any screen area
* uncovered by resizing the window. When there is no window manager, nothing
* is done with the uncovered area.
*
* @api
*/
void gwinResize(GHandle gh, coord_t width, coord_t height);
/**
* @brief Redraw a window
*
* @param[in] gh The window
*
* @note This is normally never required as windows and widgets will redraw as required.
* Note that some windows are incapable of redrawing themselves as they don't save
* their drawing state.
*
* @api
*/
void gwinRedraw(GHandle gh);
#if GWIN_NEED_WINDOWMANAGER || defined (__DOXYGEN__)
/**
* @brief Redraw a window
*
* @param[in] g The display to redraw. Passing NULL will redraw all displays.
* @param[in] preserve Should the redraw try to preserve existing screen data for those
* windows that can't redraw themselves?
*
* @note This is normally never required as windows and widgets will redraw as required.
* @note Some windows are incapable of redrawing themselves as they don't save
* their drawing state.
* @note This does not clear the background - just redraws the gwin windows (where possible)
*
* @api
*/
void gwinRedrawDisplay(GDisplay *g, bool_t preserve);
/**
* @brief Minimize, Maximize or Restore a window
* @pre GWIN_NEED_WINDOWMANAGER must be TRUE
*
* @param[in] gh The window
* @param[in] minmax The new minimized/maximized state
*
* @note The final window state may not be the requested state. Window Managers
* do not need to implement changing the minmax state. If there is no
* window manager this call is ignored.
* @note The window is redrawn if it is changed. See the comments in @p gwinSetVisible()
* with regard to what can be redrawn and what can't.
* @note It is up to the window manager to determine what happens with any screen area
* uncovered by resizing the window.
* @note When a window is minimised it may be asked to draw the window or the window
* manager may draw the minimised window.
*
* @api
*/
void gwinSetMinMax(GHandle gh, GWindowMinMax minmax);
/**
* @brief Get the Minimized/Maximized state of a window
* @pre GWIN_NEED_WINDOWMANAGER must be TRUE
*
* @param[in] gh The window
*
* @return GWIN_NORMAL, GWIN_MAXIMIZE or GWIN_MINIMIZE
*
* @api
*/
GWindowMinMax gwinGetMinMax(GHandle gh);
/**
* @brief Raise a window to the top of the z-order
* @pre GWIN_NEED_WINDOWMANAGER must be TRUE
*
* @param[in] gh The window
*
* @note The window z-order is only supported by some window managers. See the comments
* in @p gwinSetVisible() with regard to what can be redrawn and what can't.
*
* @api
*/
void gwinRaise(GHandle gh);
/**
* @brief Get the next window in the z-order
* @return The next window or NULL if no more windows
*
* @param[in] gh The previous window or NULL to get the first window
*
* @note This returns the next window in the system from top to bottom.
* @note Where there are parent child relationships, this ignores them
* and will list all windows in the system. There is no defined
* order between children of siblings and they can in fact be mixed
* in order. The only relationship honored is that parents will be
* listed before their children.
*
* @api
*/
GHandle gwinGetNextWindow(GHandle gh);
#endif
#if GDISP_NEED_TEXT || defined(__DOXYGEN__)
/**
* @brief Set the current font for this window.
*
* @param[in] gh The window handle
* @param[in] font The font to use for text functions
*
* @api
*/
void gwinSetFont(GHandle gh, font_t font);
#endif
/*-------------------------------------------------
* Drawing functions
*-------------------------------------------------*/
/**
* @brief Clear the window
* @note Uses the current background color to clear the window
*
* @param[in] gh The window handle
*
* @api
*/
void gwinClear(GHandle gh);
/**
* @brief Set a pixel in the window
* @note Uses the current foreground color to set the pixel
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x,y The coordinates of the pixel
*
* @api
*/
void gwinDrawPixel(GHandle gh, coord_t x, coord_t y);
/**
* @brief Draw a line in the window
* @note Uses the current foreground color to draw the line
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x0,y0 The start position
* @param[in] x1,y1 The end position
*
* @api
*/
void gwinDrawLine(GHandle gh, coord_t x0, coord_t y0, coord_t x1, coord_t y1);
/**
* @brief Draw a box in the window
* @note Uses the current foreground color to draw the box
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x,y The start position
* @param[in] cx,cy The size of the box (outside dimensions)
*
* @api
*/
void gwinDrawBox(GHandle gh, coord_t x, coord_t y, coord_t cx, coord_t cy);
/**
* @brief Fill an rectangular area in the window
* @note Uses the current foreground color to fill the box
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x,y The start position
* @param[in] cx,cy The size of the box (outside dimensions)
*
* @api
*/
void gwinFillArea(GHandle gh, coord_t x, coord_t y, coord_t cx, coord_t cy);
/**
* @brief Fill an area in the window using the supplied bitmap.
* @details The bitmap is in the pixel format specified by the low level driver
* @note If GDISP_NEED_ASYNC is defined then the buffer must be static
* or at least retained until this call has finished the blit. You can
* tell when all graphics drawing is finished by @p gdispIsBusy() going FALSE.
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x, y The start filled area
* @param[in] cx, cy The width and height to be filled
* @param[in] srcx, srcy The bitmap position to start the fill from
* @param[in] srccx The width of a line in the bitmap.
* @param[in] buffer The pixels to use to fill the area.
*
* @api
*/
void gwinBlitArea(GHandle gh, coord_t x, coord_t y, coord_t cx, coord_t cy, coord_t srcx, coord_t srcy, coord_t srccx, const pixel_t *buffer);
/*-------------------------------------------------
* Circle, ellipse and arc functions
*-------------------------------------------------*/
#if GDISP_NEED_CIRCLE || defined(__DOXYGEN__)
/**
* @brief Draw a circle in the window.
* @note Uses the current foreground color to draw the circle
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x, y The center of the circle
* @param[in] radius The radius of the circle
*
* @api
*/
void gwinDrawCircle(GHandle gh, coord_t x, coord_t y, coord_t radius);
/**
* @brief Draw a filled circle in the window.
* @note Uses the current foreground color to draw the filled circle
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x, y The center of the circle
* @param[in] radius The radius of the circle
*
* @api
*/
void gwinFillCircle(GHandle gh, coord_t x, coord_t y, coord_t radius);
#endif
#if GDISP_NEED_ELLIPSE || defined(__DOXYGEN__)
/**
* @brief Draw an ellipse.
* @note Uses the current foreground color to draw the ellipse
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x,y The center of the ellipse
* @param[in] a,b The dimensions of the ellipse
*
* @api
*/
void gwinDrawEllipse(GHandle gh, coord_t x, coord_t y, coord_t a, coord_t b);
/**
* @brief Draw an filled ellipse.
* @note Uses the current foreground color to draw the filled ellipse
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x,y The center of the ellipse
* @param[in] a,b The dimensions of the ellipse
*
* @api
*/
void gwinFillEllipse(GHandle gh, coord_t x, coord_t y, coord_t a, coord_t b);
#endif
#if GDISP_NEED_ARC || defined(__DOXYGEN__)
/*
* @brief Draw an arc in the window.
* @note Uses the current foreground color to draw the arc
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x,y The center point
* @param[in] radius The radius of the arc
* @param[in] start The start angle (0 to 360)
* @param[in] end The end angle (0 to 360)
*
* @api
*/
void gwinDrawArc(GHandle gh, coord_t x, coord_t y, coord_t radius, coord_t startangle, coord_t endangle);
/*
* @brief Draw a filled arc in the window.
* @note Uses the current foreground color to draw the filled arc
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x,y The center point
* @param[in] radius The radius of the arc
* @param[in] start The start angle (0 to 360)
* @param[in] end The end angle (0 to 360)
*
* @api
*/
void gwinFillArc(GHandle gh, coord_t x, coord_t y, coord_t radius, coord_t startangle, coord_t endangle);
#endif
/*-------------------------------------------------
* Pixel read-back functions
*-------------------------------------------------*/
#if GDISP_NEED_PIXELREAD || defined(__DOXYGEN__)
/**
* @brief Get the color of a pixel in the window.
* @return The color of the pixel.
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x,y The position in the window
*
* @api
*/
color_t gwinGetPixelColor(GHandle gh, coord_t x, coord_t y);
#endif
/*-------------------------------------------------
* Text functions
*-------------------------------------------------*/
#if GDISP_NEED_TEXT || defined(__DOXYGEN__)
/**
* @brief Draw a text character at the specified position in the window.
* @pre The font must have been set.
* @note Uses the current foreground color to draw the character
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x,y The position for the text
* @param[in] c The character to draw
*
* @api
*/
void gwinDrawChar(GHandle gh, coord_t x, coord_t y, char c);
/**
* @brief Draw a text character with a filled background at the specified position in the window.
* @pre The font must have been set.
* @note Uses the current foreground color to draw the character and fills the background using the background drawing color
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x,y The position for the text
* @param[in] c The character to draw
*
* @api
*/
void gwinFillChar(GHandle gh, coord_t x, coord_t y, char c);
/**
* @brief Draw a text string in the window
* @pre The font must have been set.
* @note Uses the current foreground color to draw the character
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x,y The position for the text
* @param[in] str The string to draw
*
* @api
*/
void gwinDrawString(GHandle gh, coord_t x, coord_t y, const char *str);
/**
* @brief Draw a text string with a filled background in the window
* @pre The font must have been set.
* @note Uses the current foreground color to draw the character and fills the background using the background drawing color
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x,y The position for the text
* @param[in] str The string to draw
*
* @api
*/
void gwinFillString(GHandle gh, coord_t x, coord_t y, const char *str);
/**
* @brief Draw a text string verticly centered within the specified box.
* @pre The font must have been set.
* @note Uses the current foreground color to draw the character.
* @note The specified box does not need to align with the window box
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x,y The position for the text (need to define top-right or base-line - check code)
* @param[in] cx,cy The width and height of the box
* @param[in] str The string to draw
* @param[in] justify Justify the text left, center or right within the box
*
* @api
*/
void gwinDrawStringBox(GHandle gh, coord_t x, coord_t y, coord_t cx, coord_t cy, const char* str, justify_t justify);
/**
* @brief Draw a text string verticly centered within the specified filled box.
* @pre The font must have been set.
* @note Uses the current foreground color to draw the character and fills the background using the background drawing color
* @note The entire box is filled. Note this box does not need to align with the window box
* @note May leave GDISP clipping to this window's dimensions
*
* @param[in] gh The window handle
* @param[in] x,y The position for the text (need to define top-right or base-line - check code)
* @param[in] cx,cy The width and height of the box
* @param[in] str The string to draw
* @param[in] justify Justify the text left, center or right within the box
*
* @api
*/
void gwinFillStringBox(GHandle gh, coord_t x, coord_t y, coord_t cx, coord_t cy, const char* str, justify_t justify);
#endif
/*-------------------------------------------------
* Polygon functions
*-------------------------------------------------*/
#if GDISP_NEED_CONVEX_POLYGON || defined(__DOXYGEN__)
/**
* @brief Draw an enclosed polygon (convex, non-convex or complex).
*
* @note Uses the current foreground color.
*
* @param[in] gh The window handle
* @param[in] tx, ty Transform all points in pntarray by tx, ty
* @param[in] pntarray An array of points
* @param[in] cnt The number of points in the array
*
* @api
*/
void gwinDrawPoly(GHandle gh, coord_t tx, coord_t ty, const point *pntarray, unsigned cnt);
/**
* @brief Fill a convex polygon
* @details Doesn't handle non-convex or complex polygons.
*
* @note Uses the current foreground color.
*
* @param[in] gh The window handle
* @param[in] tx, ty Transform all points in pntarray by tx, ty
* @param[in] pntarray An array of points
* @param[in] cnt The number of points in the array
*
* @note Convex polygons are those that have no internal angles. That is;
* you can draw a line from any point on the polygon to any other point
* on the polygon without it going outside the polygon. In our case we generalise
* this a little by saying that an infinite horizontal line (at any y value) will cross
* no more than two edges on the polygon. Some non-convex polygons do fit this criteria
* and can therefore be drawn.
* @note This routine is designed to be very efficient with even simple display hardware.
*
* @api
*/
void gwinFillConvexPoly(GHandle gh, coord_t tx, coord_t ty, const point *pntarray, unsigned cnt);
#endif
/*-------------------------------------------------
* Image functions
*-------------------------------------------------*/
#if GDISP_NEED_IMAGE || defined(__DOXYGEN__)
/**
* @brief Draw the image
* @return GDISP_IMAGE_ERR_OK (0) on success or an error code.
*
* @param[in] gh The window handle
* @param[in] img The image structure
* @param[in] x,y The window location to draw the image
* @param[in] cx,cy The area on the screen to draw
* @param[in] sx,sy The image position to start drawing at
*
* @pre gdispImageOpen() must have returned successfully.
*
* @note If sx,sy + cx,cy is outside the image boundaries the area outside the image
* is simply not drawn.
* @note If @p gdispImageCache() has been called first for this frame, this routine will draw using a
* fast blit from the cached frame. If not, it reads the input and decodes it as it
* is drawing. This may be significantly slower than if the image has been cached (but
* uses a lot less RAM)
*
* @api
*/
gdispImageError gwinDrawImage(GHandle gh, gdispImage *img, coord_t x, coord_t y, coord_t cx, coord_t cy, coord_t sx, coord_t sy);
#endif
#ifdef __cplusplus
}
#endif
/*-------------------------------------------------
* Additional functionality
*-------------------------------------------------*/
/* Include widgets */
#if GWIN_NEED_WIDGET || defined(__DOXYGEN__)
#include "src/gwin/gwidget.h"
#endif
/* Include containers */
#if GWIN_NEED_CONTAINERS || defined(__DOXYGEN__)
#include "src/gwin/gcontainer.h"
#endif
/* Include vanilla window objects */
#if GWIN_NEED_CONSOLE || defined(__DOXYGEN__)
#include "src/gwin/console.h"
#endif
#if GWIN_NEED_GRAPH || defined(__DOXYGEN__)
#include "src/gwin/graph.h"
#endif
#if GWIN_NEED_IMAGE || defined(__DOXYGEN__)
#include "src/gwin/gimage.h"
#endif
#endif /* GFX_USE_GWIN */
#endif /* _GWIN_H */
/** @} */
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