harmony 鸿蒙Drawing

2023-06-24
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Drawing

The Drawing module provides functions for 2D graphics rendering, text drawing, and image display.

It provides the 2D drawing capability.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Since

Summary

Files

Name	Description
drawing_bitmap.h	Declares functions related to the bitmap object in the drawing module. File to include: Library: libnative_drawing.so
drawing_brush.h	Declares functions related to the brush object in the drawing module. File to include: Library: libnative_drawing.so
drawing_canvas.h	Declares functions related to the canvas object in the drawing module. File to include: Library: libnative_drawing.so
drawing_color.h	Declares functions related to the color object in the drawing module. File to include: Library: libnative_drawing.so
drawing_font_collection.h	Declares functions related to FontCollection in the drawing module. File to include: Library: libnative_drawing.so
drawing_path.h	Declares functions related to the path object in the drawing module. File to include: Library: libnative_drawing.so
drawing_pen.h	Declares functions related to the pen object in the drawing module. File to include: Library: libnative_drawing.so
drawing_text_declaration.h	Declares the struct related to text in 2D drawing. File to include: Library: libnative_drawing.so
drawing_text_typography.h	Declares functions related to typography in the drawing module. File to include: Library: libnative_drawing.so
drawing_types.h	Declares the data types for drawing 2D graphics, including the canvas, brush, pen, bitmap, and path. File to include: Library: libnative_drawing.so

Structs

Name	Description
OH_Drawing_BitmapFormat	Defines the pixel format of a bitmap, including the color type and alpha type.

Types

Name	Description
OH_Drawing_FontCollection	Defines an OH_Drawing_FontCollection, which is used to load fonts.
OH_Drawing_Typography	Defines an OH_Drawing_Typography, which is used to manage the typography layout and display.
OH_Drawing_TextStyle	Defines an OH_Drawing_TextStyle, which is used to manage text colors and decorations.
OH_Drawing_TypographyStyle	Defines an OH_Drawing_TypographyStyle, which is used to manage the typography style, such as the text direction.
OH_Drawing_TypographyCreate	Defines an OH_Drawing_TypographyCreate, which is used to create an OH_Drawing_Typography object.
OH_Drawing_Canvas	Defines a rectangular canvas on which various shapes, images, and texts can be drawn by using the brush and pen.
OH_Drawing_Pen	Defines a pen, which is used to describe the style and color to outline a shape.
OH_Drawing_Brush	Defines a brush, which is used to describe the style and color to fill in a shape.
OH_Drawing_Path	Defines a path, which is used to customize various shapes.
OH_Drawing_Bitmap	Defines a bitmap, which is a memory area that contains the pixel data of a shape.

Enums

Name	Description
OH_Drawing_PenLineCapStyle { LINE_FLAT_CAP, LINE_SQUARE_CAP, LINE_ROUND_CAP }	Enumerates the line cap styles of a pen. The line cap style defines the style of both ends of a line segment drawn by the pen.
OH_Drawing_PenLineJoinStyle { LINE_MITER_JOIN, LINE_ROUND_JOIN, LINE_BEVEL_JOIN }	Enumerates the line join styles of a pen. The line join style defines the shape of the joints of a polyline segment drawn by the pen.
OH_Drawing_TextDirection { TEXT_DIRECTION_RTL, TEXT_DIRECTION_LTR }	Enumerates the text directions.
OH_Drawing_TextAlign { TEXT_ALIGN_LEFT, TEXT_ALIGN_RIGHT, TEXT_ALIGN_CENTER, TEXT_ALIGN_JUSTIFY, TEXT_ALIGN_START, TEXT_ALIGN_END }	Enumerates the text alignment modes.
OH_Drawing_FontWeight { FONT_WEIGHT_100, FONT_WEIGHT_200, FONT_WEIGHT_300, FONT_WEIGHT_400, FONT_WEIGHT_500, FONT_WEIGHT_600, FONT_WEIGHT_700, FONT_WEIGHT_800, FONT_WEIGHT_900 }	Enumerates the font weights.
OH_Drawing_TextBaseline { TEXT_BASELINE_ALPHABETIC, TEXT_BASELINE_IDEOGRAPHIC }	Enumerates the text baselines.
OH_Drawing_TextDecoration { TEXT_DECORATION_NONE = 0x0, TEXT_DECORATION_UNDERLINE = 0x1, TEXT_DECORATION_OVERLINE = 0x2, TEXT_DECORATION_LINE_THROUGH = 0x4 }	Enumerates the text decorations.
OH_Drawing_FontStyle { FONT_STYLE_NORMAL, FONT_STYLE_ITALIC }	Enumerates the font styles.
OH_Drawing_ColorFormat { COLOR_FORMAT_UNKNOWN, COLOR_FORMAT_ALPHA_8, COLOR_FORMAT_RGB_565, COLOR_FORMAT_ARGB_4444, COLOR_FORMAT_RGBA_8888, COLOR_FORMAT_BGRA_8888 }	Enumerates the storage formats of bitmap pixels.
OH_Drawing_AlphaFormat { ALPHA_FORMAT_UNKNOWN, ALPHA_FORMAT_OPAQUE, ALPHA_FORMAT_PREMUL, ALPHA_FORMAT_UNPREMUL }	Enumerates the alpha formats of bitmap pixels.

Functions

Name	Description
OH_Drawing_BitmapCreate (void)	Creates an OH_Drawing_Bitmap object.
OH_Drawing_BitmapDestroy (OH_Drawing_Bitmap *)	Destroys an OH_Drawing_Bitmap object and reclaims the memory occupied by the object.
OH_Drawing_BitmapBuild (OH_Drawing_Bitmap , const uint32_t width, const uint32_t height, const OH_Drawing_BitmapFormat )	Initializes the width and height of an OH_Drawing_Bitmap object and sets its pixel format.
OH_Drawing_BitmapGetWidth (OH_Drawing_Bitmap *)	Obtains the width of a bitmap.
OH_Drawing_BitmapGetHeight (OH_Drawing_Bitmap *)	Obtains the height of a bitmap.
OH_Drawing_BitmapGetPixels (OH_Drawing_Bitmap *)	Obtains the pixel address of a bitmap. You can use this address to obtain the pixel data of the bitmap.
OH_Drawing_BrushCreate (void)	Creates an OH_Drawing_Brush object.
OH_Drawing_BrushDestroy (OH_Drawing_Brush *)	Destroys an OH_Drawing_Brush object and reclaims the memory occupied by the object.
OH_Drawing_BrushIsAntiAlias (const OH_Drawing_Brush *)	Checks whether anti-aliasing is enabled for a brush. If anti-aliasing is enabled, edges will be drawn with partial transparency.
OH_Drawing_BrushSetAntiAlias (OH_Drawing_Brush *, bool)	Enables or disables anti-aliasing for a brush. If anti-aliasing is enabled, edges will be drawn with partial transparency.
OH_Drawing_BrushGetColor (const OH_Drawing_Brush *)	Obtains the color of a brush. The color is used by the brush to fill in a shape.
OH_Drawing_BrushSetColor (OH_Drawing_Brush *, uint32_t color)	Sets the color for a brush. The color will be used by the brush to fill in a shape.
OH_Drawing_CanvasCreate (void)	Creates an OH_Drawing_Canvas object.
OH_Drawing_CanvasDestroy (OH_Drawing_Canvas *)	Destroys an OH_Drawing_Canvas object and reclaims the memory occupied by the object.
OH_Drawing_CanvasBind (OH_Drawing_Canvas , OH_Drawing_Bitmap )	Binds a bitmap to a canvas so that the content drawn on the canvas is output to the bitmap. (This process is called CPU rendering.)
OH_Drawing_CanvasAttachPen (OH_Drawing_Canvas , const OH_Drawing_Pen )	Attaches a pen to a canvas so that the canvas will use the style and color of the pen to outline a shape.
OH_Drawing_CanvasDetachPen (OH_Drawing_Canvas *)	Detaches the pen from a canvas so that the canvas will not use the style and color of the pen to outline a shape.
OH_Drawing_CanvasAttachBrush (OH_Drawing_Canvas , const OH_Drawing_Brush )	Attaches a brush to a canvas so that the canvas will use the style and color of the brush to fill in a shape.
OH_Drawing_CanvasDetachBrush (OH_Drawing_Canvas *)	Detaches the brush from a canvas so that the canvas will not use the style and color of the brush to fill in a shape.
OH_Drawing_CanvasSave (OH_Drawing_Canvas *)	Saves the current canvas status (canvas matrix) to the top of the stack.
OH_Drawing_CanvasRestore (OH_Drawing_Canvas *)	Restores the canvas status (canvas matrix) saved on the top of the stack.
OH_Drawing_CanvasDrawLine (OH_Drawing_Canvas *, float x1, float y1, float x2, float y2)	Draws a line segment.
OH_Drawing_CanvasDrawPath (OH_Drawing_Canvas , const OH_Drawing_Path )	Draws a path.
OH_Drawing_CanvasClear (OH_Drawing_Canvas *, uint32_t color)	Clears a canvas by using a specified color.
OH_Drawing_ColorSetArgb (uint32_t alpha, uint32_t red, uint32_t green, uint32_t blue)	Converts four variables (alpha, red, green, and blue) into a 32-bit (ARGB) variable that describes a color.
OH_Drawing_CreateFontCollection (void)	Creates an OH_Drawing_FontCollection object.
OH_Drawing_DestroyFontCollection (OH_Drawing_FontCollection *)	Destroys an OH_Drawing_FontCollection object and reclaims the memory occupied by the object.
OH_Drawing_PathCreate (void)	Creates an OH_Drawing_Path object.
OH_Drawing_PathDestroy (OH_Drawing_Path *)	Destroys an OH_Drawing_Path object and reclaims the memory occupied by the object.
OH_Drawing_PathMoveTo (OH_Drawing_Path *, float x, float y)	Sets the start point of a path.
OH_Drawing_PathLineTo (OH_Drawing_Path *, float x, float y)	Draws a line segment from the last point of a path to the target point.
OH_Drawing_PathArcTo (OH_Drawing_Path *, float x1, float y1, float x2, float y2, float startDeg, float sweepDeg)	Draws an arc to a path. This is done by using angle arc mode. In this mode, a rectangle that encloses an ellipse is specified first, and then a start angle and a sweep angle are specified. The arc is a portion of the ellipse defined by the start angle and the sweep angle. By default, a line segment from the last point of the path to the start point of the arc is also added.
OH_Drawing_PathQuadTo (OH_Drawing_Path *, float ctrlX, float ctrlY, float endX, float endY)	Draws a quadratic Bezier curve from the last point of a path to the target point.
OH_Drawing_PathCubicTo (OH_Drawing_Path *, float ctrlX1, float ctrlY1, float ctrlX2, float ctrlY2, float endX, float endY)	Draws a cubic Bezier curve from the last point of a path to the target point.
OH_Drawing_PathClose (OH_Drawing_Path *)	Closes a path. A line segment from the start point to the last point of the path is added.
OH_Drawing_PathReset (OH_Drawing_Path *)	Resets path data.
OH_Drawing_PenCreate (void)	Creates an OH_Drawing_Pen object.
OH_Drawing_PenDestroy (OH_Drawing_Pen *)	Destroys an OH_Drawing_Pen object and reclaims the memory occupied by the object.
OH_Drawing_PenIsAntiAlias (const OH_Drawing_Pen *)	Checks whether anti-aliasing is enabled for a pen. If anti-aliasing is enabled, edges will be drawn with partial transparency.
OH_Drawing_PenSetAntiAlias (OH_Drawing_Pen *, bool)	Enables or disables anti-aliasing for a pen. If anti-aliasing is enabled, edges will be drawn with partial transparency.
OH_Drawing_PenGetColor (const OH_Drawing_Pen *)	Obtains the color of a pen. The color is used by the pen to outline a shape.
OH_Drawing_PenSetColor (OH_Drawing_Pen *, uint32_t color)	Sets the color for a pen. The color is used by the pen to outline a shape.
OH_Drawing_PenGetWidth (const OH_Drawing_Pen *)	Obtains the thickness of a pen. This thickness determines the width of the outline of a shape.
OH_Drawing_PenSetWidth (OH_Drawing_Pen *, float width)	Sets the thickness for a pen. This thickness determines the width of the outline of a shape.
OH_Drawing_PenGetMiterLimit (const OH_Drawing_Pen *)	Obtains the stroke miter limit of a polyline drawn by a pen. When the corner type is bevel, a beveled corner is displayed if the miter limit is exceeded, and a mitered corner is displayed if the miter limit is not exceeded.
OH_Drawing_PenSetMiterLimit (OH_Drawing_Pen *, float miter)	Sets the stroke miter limit for a polyline drawn by a pen. When the corner type is bevel, a beveled corner is displayed if the miter limit is exceeded, and a mitered corner is displayed if the miter limit is not exceeded.
OH_Drawing_PenGetCap (const OH_Drawing_Pen *)	Obtains the line cap style of a pen.
OH_Drawing_PenSetCap (OH_Drawing_Pen *, OH_Drawing_PenLineCapStyle)	Sets the line cap style for a pen.
OH_Drawing_PenGetJoin (const OH_Drawing_Pen *)	Obtains the line join style of a pen.
OH_Drawing_PenSetJoin (OH_Drawing_Pen *, OH_Drawing_PenLineJoinStyle)	Sets the line join style for a pen.
OH_Drawing_CreateTypographyStyle (void)	Creates an OH_Drawing_TypographyStyle object.
OH_Drawing_DestroyTypographyStyle (OH_Drawing_TypographyStyle *)	Destroys an OH_Drawing_TypographyStyle object and reclaims the memory occupied by the object.
OH_Drawing_SetTypographyTextDirection (OH_Drawing_TypographyStyle *, int)	Sets the text direction.
OH_Drawing_SetTypographyTextAlign (OH_Drawing_TypographyStyle *, int)	Sets the text alignment mode.
OH_Drawing_SetTypographyTextMaxLines (OH_Drawing_TypographyStyle *, int)	Sets the maximum number of lines in the text.
OH_Drawing_CreateTextStyle (void)	Creates an OH_Drawing_TextStyle object.
OH_Drawing_DestroyTextStyle (OH_Drawing_TextStyle *)	Destroys an OH_Drawing_TextStyle object and reclaims the memory occupied by the object.
OH_Drawing_SetTextStyleColor (OH_Drawing_TextStyle *, uint32_t)	Sets the text color.
OH_Drawing_SetTextStyleFontSize (OH_Drawing_TextStyle *, double)	Sets the font size.
OH_Drawing_SetTextStyleFontWeight (OH_Drawing_TextStyle *, int)	Sets the font weight.
OH_Drawing_SetTextStyleBaseLine (OH_Drawing_TextStyle *, int)	Sets the text baseline.
OH_Drawing_SetTextStyleDecoration (OH_Drawing_TextStyle *, int)	Sets the text decoration.
OH_Drawing_SetTextStyleDecorationColor (OH_Drawing_TextStyle *, uint32_t)	Sets the color for the text decoration.
OH_Drawing_SetTextStyleFontHeight (OH_Drawing_TextStyle *, double)	Sets the font height.
OH_Drawing_SetTextStyleFontFamilies (OH_Drawing_TextStyle , int, const char fontFamilies[])	Sets the font families.
OH_Drawing_SetTextStyleFontStyle (OH_Drawing_TextStyle *, int)	Sets the font style.
OH_Drawing_SetTextStyleLocale (OH_Drawing_TextStyle , const char )	Sets the locale.
OH_Drawing_CreateTypographyHandler (OH_Drawing_TypographyStyle , OH_Drawing_FontCollection )	Creates an OH_Drawing_TypographyCreate object.
OH_Drawing_DestroyTypographyHandler (OH_Drawing_TypographyCreate *)	Destroys an OH_Drawing_TypographyCreate object and reclaims the memory occupied by the object.
OH_Drawing_TypographyHandlerPushTextStyle (OH_Drawing_TypographyCreate , OH_Drawing_TextStyle )	Sets the text style.
OH_Drawing_TypographyHandlerAddText (OH_Drawing_TypographyCreate , const char )	Sets the text content.
OH_Drawing_TypographyHandlerPopTextStyle (OH_Drawing_TypographyCreate *)	Removes the topmost style in the stack, leaving the remaining styles in effect.
OH_Drawing_CreateTypography (OH_Drawing_TypographyCreate *)	Creates an OH_Drawing_Typography object.
OH_Drawing_DestroyTypography (OH_Drawing_Typography *)	Destroys an OH_Drawing_Typography object and reclaims the memory occupied by the object.
OH_Drawing_TypographyLayout (OH_Drawing_Typography *, double)	Lays out the typography.
OH_Drawing_TypographyPaint (OH_Drawing_Typography , OH_Drawing_Canvas , double, double)	Paints text on the canvas.
OH_Drawing_TypographyGetMaxWidth (OH_Drawing_Typography *)	Obtains the maximum width.
OH_Drawing_TypographyGetHeight (OH_Drawing_Typography *)	Obtains the height.
OH_Drawing_TypographyGetLongestLine (OH_Drawing_Typography *)	Obtains the longest line.
OH_Drawing_TypographyGetMinIntrinsicWidth (OH_Drawing_Typography *)	Obtains the minimum intrinsic width.
OH_Drawing_TypographyGetMaxIntrinsicWidth (OH_Drawing_Typography *)	Obtains the maximum intrinsic width.
OH_Drawing_TypographyGetAlphabeticBaseline(OH_Drawing_Typography *)	Obtains the alphabetic baseline.
OH_Drawing_TypographyGetIdeographicBaseline (OH_Drawing_Typography *)	Obtains the ideographic baseline.

Type Description

OH_Drawing_Bitmap

typedef struct OH_Drawing_Bitmap OH_Drawing_Bitmap

Description

Defines a bitmap, which is a memory area that contains the pixel data of a shape.

Since

OH_Drawing_Brush

typedef struct OH_Drawing_Brush OH_Drawing_Brush

Description

Defines a brush, which is used to describe the style and color to fill in a shape.

Since

OH_Drawing_Canvas

typedef struct OH_Drawing_Canvas OH_Drawing_Canvas

Description

Defines a rectangular canvas on which various shapes, images, and texts can be drawn by using the brush and pen.

Since

OH_Drawing_FontCollection

typedef struct OH_Drawing_FontCollection OH_Drawing_FontCollection

Description

Defines an OH_Drawing_FontCollection, which is used to load fonts.

Since

OH_Drawing_Path

typedef struct OH_Drawing_Path OH_Drawing_Path

Description

Defines a path, which is used to customize various shapes.

Since

OH_Drawing_Pen

typedef struct OH_Drawing_Pen OH_Drawing_Pen

Description

Defines a pen, which is used to describe the style and color to outline a shape.

Since

OH_Drawing_TextStyle

typedef struct OH_Drawing_TextStyle OH_Drawing_TextStyle

Description

Defines an OH_Drawing_TextStyle, which is used to manage text colors and decorations.

Since

OH_Drawing_Typography

typedef struct OH_Drawing_Typography OH_Drawing_Typography

Description

Defines an OH_Drawing_Typography, which is used to manage the typography layout and display.

Since

OH_Drawing_TypographyCreate

typedef struct OH_Drawing_TypographyCreate OH_Drawing_TypographyCreate

Description

Defines an OH_Drawing_TypographyCreate, which is used to create an OH_Drawing_Typography object.

Since

OH_Drawing_TypographyStyle

typedef struct OH_Drawing_TypographyStyle OH_Drawing_TypographyStyle

Description

Defines an OH_Drawing_TypographyStyle, which is used to manage the typography style, such as the text direction.

Since

Enum Description

OH_Drawing_AlphaFormat

enum OH_Drawing_AlphaFormat

Description

Enumerates the alpha formats of bitmap pixels.

Value	Description
ALPHA_FORMAT_UNKNOWN	Unknown format.
ALPHA_FORMAT_OPAQUE	The bitmap does not have the alpha component.
ALPHA_FORMAT_PREMUL	The color component of each pixel is premultiplied by the alpha component.
ALPHA_FORMAT_UNPREMUL	The color component of each pixel is not premultiplied by the alpha component.

Since

OH_Drawing_ColorFormat

enum OH_Drawing_ColorFormat

Description

Enumerates the storage formats of bitmap pixels.

Value	Description
COLOR_FORMAT_UNKNOWN	Unknown format.
COLOR_FORMAT_ALPHA_8	Each pixel is represented by 8 bits, which together indicate alpha.
COLOR_FORMAT_RGB_565	Each pixel is represented by 16 bits. From the most significant bit to the least significant bit, the first 5 bits indicate red, the subsequent 6 bits indicate green, and the last 5 bits indicate blue.
COLOR_FORMAT_ARGB_4444	Each pixel is represented by 16 bits. From the most significant bit to the least significant bit, every 4 bits indicate alpha, red, green, and blue, respectively.
COLOR_FORMAT_RGBA_8888	Each pixel is represented by 32 bits. From the most significant bit to the least significant bit, every 8 bits indicate alpha, red, green, and blue, respectively.
COLOR_FORMAT_BGRA_8888	Each pixel is represented by 32 bits. From the most significant bit to the least significant bit, every 8 bits indicate blue, green, red, and alpha, respectively.

Since

OH_Drawing_FontStyle

enum OH_Drawing_FontStyle

Description

Enumerates the font styles.

Value	Description
FONT_STYLE_NORMAL	Normal style.
FONT_STYLE_ITALIC	Italic.

Since

OH_Drawing_FontWeight

enum OH_Drawing_FontWeight

Description

Enumerates the font weights.

Value	Description
FONT_WEIGHT_100	Thin.
FONT_WEIGHT_200	Extra-light.
FONT_WEIGHT_300	Light.
FONT_WEIGHT_400	.Normal/Regular.
FONT_WEIGHT_500	Medium.
FONT_WEIGHT_600	Semi-bold.
FONT_WEIGHT_700	Bold.
FONT_WEIGHT_800	Extra-bold.
FONT_WEIGHT_900	Black.

Since

OH_Drawing_PenLineCapStyle

enum OH_Drawing_PenLineCapStyle

Description

Enumerates the line cap styles of a pen. The line cap style defines the style of both ends of a line segment drawn by the pen.

Value	Description
LINE_FLAT_CAP	There is no cap style. Both ends of the line segment are cut off square.
LINE_SQUARE_CAP	Square cap style. Both ends have a square, the height of which is half of the width of the line segment, with the same width.
LINE_ROUND_CAP	Round cap style. Both ends have a semicircle centered, the diameter of which is the same as the width of the line segment.

Since

OH_Drawing_PenLineJoinStyle

enum OH_Drawing_PenLineJoinStyle

Description

Enumerates the line join styles of a pen. The line join style defines the shape of the joints of a polyline segment drawn by the pen.

Value	Description
LINE_MITER_JOIN	Mitered corner. If the angle of a polyline is small, its miter length may be inappropriate. In this case, you need to use the miter limit to limit the miter length.
LINE_ROUND_JOIN	Round corner.
LINE_BEVEL_JOIN	Beveled corner.

Since

OH_Drawing_TextAlign

enum OH_Drawing_TextAlign

Description

Enumerates the text alignment modes.

Value	Description
TEXT_ALIGN_LEFT	Left-aligned.
TEXT_ALIGN_RIGHT	Right-aligned.
TEXT_ALIGN_CENTER	Center-aligned.
TEXT_ALIGN_JUSTIFY	Justified, which means that each line (except the last line) is stretched so that every line has equal width, and the left and right margins are straight.
TEXT_ALIGN_START	TEXT_ALIGN_START achieves the same effect as TEXT_ALIGN_LEFT when OH_Drawing_TextDirection is TEXT_DIRECTION_LTR; it achieves the same effect as TEXT_ALIGN_RIGHT when OH_Drawing_TextDirection is TEXT_DIRECTION_RTL.
TEXT_ALIGN_END	TEXT_ALIGN_END achieves the same effect as TEXT_ALIGN_RIGHT when OH_Drawing_TextDirection is TEXT_DIRECTION_LTR; it achieves the same effect as TEXT_ALIGN_LEFT when OH_Drawing_TextDirection is TEXT_DIRECTION_RTL.

Since

OH_Drawing_TextBaseline

enum OH_Drawing_TextBaseline

Description

Enumerates the text baselines.

Value	Description
TEXT_BASELINE_ALPHABETIC	Alphabetic, where the letters in alphabets like English sit on.
TEXT_BASELINE_IDEOGRAPHIC	Ideographic. The baseline is at the bottom of the text area.

Since

OH_Drawing_TextDecoration

enum OH_Drawing_TextDecoration

Description

Enumerates the text decorations.

Value	Description
TEXT_DECORATION_NONE	No decoration.
TEXT_DECORATION_UNDERLINE	An underline is used for decoration.
TEXT_DECORATION_OVERLINE	An overline is used for decoration.
TEXT_DECORATION_LINE_THROUGH	A strikethrough is used for decoration.

Since

OH_Drawing_TextDirection

enum OH_Drawing_TextDirection

Description

Enumerates the text directions.

Value	Description
TEXT_DIRECTION_RTL	Right to left (RTL).
TEXT_DIRECTION_LTR	Left to right (LTR).

Since

Function Description

OH_Drawing_BitmapBuild()

void OH_Drawing_BitmapBuild (OH_Drawing_Bitmap * , const uint32_t width, const uint32_t height, const OH_Drawing_BitmapFormat *  )

Description

Initializes the width and height of an OH_Drawing_Bitmap object and sets its pixel format.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Bitmap	Pointer to an OH_Drawing_Bitmap object.
width	Width of the bitmap to be initialized.
height	Height of the bitmap to be initialized.
OH_Drawing_BitmapFormat	Pixel format of the bitmap to be initialized, including the pixel color type and alpha type.

Since

OH_Drawing_BitmapCreate()

OH_Drawing_Bitmap* OH_Drawing_BitmapCreate (void )

Description

Creates an OH_Drawing_Bitmap object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Returns

Returns the pointer to the OH_Drawing_Bitmap object created.

Since

OH_Drawing_BitmapDestroy()

void OH_Drawing_BitmapDestroy (OH_Drawing_Bitmap * )

Description

Destroys an OH_Drawing_Bitmap object and reclaims the memory occupied by the object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Bitmap	Pointer to an OH_Drawing_Bitmap object.

Since

OH_Drawing_BitmapGetHeight()

uint32_t OH_Drawing_BitmapGetHeight (OH_Drawing_Bitmap * )

Description

Obtains the height of a bitmap.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Bitmap	Pointer to an OH_Drawing_Bitmap object.

Returns

Returns the height.

Since

OH_Drawing_BitmapGetPixels()

void* OH_Drawing_BitmapGetPixels (OH_Drawing_Bitmap * )

Description

Obtains the pixel address of a bitmap. You can use this address to obtain the pixel data of the bitmap.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Bitmap	Pointer to an OH_Drawing_Bitmap object.

Returns

Returns the pixel address.

Since

OH_Drawing_BitmapGetWidth()

uint32_t OH_Drawing_BitmapGetWidth (OH_Drawing_Bitmap * )

Description

Obtains the width of a bitmap.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Bitmap	Pointer to an OH_Drawing_Bitmap object.

Returns

Returns the width.

Since

OH_Drawing_BrushCreate()

OH_Drawing_Brush* OH_Drawing_BrushCreate (void )

Description

Creates an OH_Drawing_Brush object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Returns

Returns the pointer to the OH_Drawing_Brush object created.

Since

OH_Drawing_BrushDestroy()

void OH_Drawing_BrushDestroy (OH_Drawing_Brush * )

Description

Destroys an OH_Drawing_Brush object and reclaims the memory occupied by the object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Brush	Pointer to an OH_Drawing_Brush object.

Since

OH_Drawing_BrushGetColor()

uint32_t OH_Drawing_BrushGetColor (const OH_Drawing_Brush * )

Description

Obtains the color of a brush. The color is used by the brush to fill in a shape.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Brush	Pointer to an OH_Drawing_Brush object.

Returns

Returns a 32-bit (ARGB) variable that describes the color.

Since

OH_Drawing_BrushIsAntiAlias()

bool OH_Drawing_BrushIsAntiAlias (const OH_Drawing_Brush * )

Description

Checks whether anti-aliasing is enabled for a brush. If anti-aliasing is enabled, edges will be drawn with partial transparency.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Brush	Pointer to an OH_Drawing_Brush object.

Returns

Returns true if anti-aliasing is enabled; returns false otherwise.

Since

OH_Drawing_BrushSetAntiAlias()

void OH_Drawing_BrushSetAntiAlias (OH_Drawing_Brush * , bool  )

Description

Enables or disables anti-aliasing for a brush. If anti-aliasing is enabled, edges will be drawn with partial transparency.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Brush	Pointer to an OH_Drawing_Brush object.
bool	Whether to enable anti-aliasing. The value true means to enable anti-aliasing, and false means the opposite.

Since

OH_Drawing_BrushSetColor()

void OH_Drawing_BrushSetColor (OH_Drawing_Brush * , uint32_t color )

Description

Sets the color for a brush. The color will be used by the brush to fill in a shape.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Brush	Pointer to an OH_Drawing_Brush object.
color	Color to set, which is a 32-bit (ARGB) variable.

Since

OH_Drawing_CanvasAttachBrush()

void OH_Drawing_CanvasAttachBrush (OH_Drawing_Canvas * , const OH_Drawing_Brush *  )

Description

Attaches a brush to a canvas so that the canvas will use the style and color of the brush to fill in a shape.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Canvas	Pointer to an OH_Drawing_Canvas object.
OH_Drawing_Brush	Pointer to an OH_Drawing_Brush object.

Since

OH_Drawing_CanvasAttachPen()

void OH_Drawing_CanvasAttachPen (OH_Drawing_Canvas * , const OH_Drawing_Pen *  )

Description

Attaches a pen to a canvas so that the canvas will use the style and color of the pen to outline a shape.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Canvas	Pointer to an OH_Drawing_Canvas object.
OH_Drawing_Pen	Pointer to an OH_Drawing_Pen object.

Since

OH_Drawing_CanvasBind()

void OH_Drawing_CanvasBind (OH_Drawing_Canvas * , OH_Drawing_Bitmap *  )

Description

Binds a bitmap to a canvas so that the content drawn on the canvas is output to the bitmap. (This process is called CPU rendering.)

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Canvas	Pointer to an OH_Drawing_Canvas object.
OH_Drawing_Bitmap	Pointer to an OH_Drawing_Bitmap object.

Since

OH_Drawing_CanvasClear()

void OH_Drawing_CanvasClear (OH_Drawing_Canvas * , uint32_t color )

Description

Clears a canvas by using a specified color.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Canvas	Pointer to an OH_Drawing_Canvas object.
color	Color to set, which is a 32-bit (ARGB) variable.

Since

OH_Drawing_CanvasCreate()

OH_Drawing_Canvas* OH_Drawing_CanvasCreate (void )

Description

Creates an OH_Drawing_Canvas object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Returns

Returns the pointer to the OH_Drawing_Canvas object created.

Since

OH_Drawing_CanvasDestroy()

void OH_Drawing_CanvasDestroy (OH_Drawing_Canvas * )

Description

Destroys an OH_Drawing_Canvas object and reclaims the memory occupied by the object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Canvas	Pointer to an OH_Drawing_Canvas object.

Since

OH_Drawing_CanvasDetachBrush()

void OH_Drawing_CanvasDetachBrush (OH_Drawing_Canvas * )

Description

Detaches the brush from a canvas so that the canvas will not use the style and color of the brush to fill in a shape.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Canvas	Pointer to an OH_Drawing_Canvas object.

Since

OH_Drawing_CanvasDetachPen()

void OH_Drawing_CanvasDetachPen (OH_Drawing_Canvas * )

Description

Detaches the pen from a canvas so that the canvas will not use the style and color of the pen to outline a shape.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Canvas	Pointer to an OH_Drawing_Canvas object.

Since

OH_Drawing_CanvasDrawLine()

void OH_Drawing_CanvasDrawLine (OH_Drawing_Canvas * , float x1, float y1, float x2, float y2 )

Description

Draws a line segment.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Canvas	Pointer to an OH_Drawing_Canvas object.
x1	X coordinate of the start point of the line segment.
y1	Y coordinate of the start point of the line segment.
x2	X coordinate of the end point of the line segment.
y2	Y coordinate of the end point of the line segment.

Since

OH_Drawing_CanvasDrawPath()

void OH_Drawing_CanvasDrawPath (OH_Drawing_Canvas * , const OH_Drawing_Path *  )

Description

Draws a path.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Canvas	Pointer to an OH_Drawing_Canvas object.
OH_Drawing_Path	Pointer to an OH_Drawing_Path object.

Since

OH_Drawing_CanvasRestore()

void OH_Drawing_CanvasRestore (OH_Drawing_Canvas * )

Description

Restores the canvas status (canvas matrix) saved on the top of the stack.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Canvas	Pointer to an OH_Drawing_Canvas object.

Since

OH_Drawing_CanvasSave()

void OH_Drawing_CanvasSave (OH_Drawing_Canvas * )

Description

Saves the current canvas status (canvas matrix) to the top of the stack.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Canvas	Pointer to an OH_Drawing_Canvas object.

Since

OH_Drawing_ColorSetArgb()

uint32_t OH_Drawing_ColorSetArgb (uint32_t alpha, uint32_t red, uint32_t green, uint32_t blue )

Description

Converts four variables (alpha, red, green, and blue) into a 32-bit (ARGB) variable that describes a color.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
alpha	Variable that describes alpha. The value ranges from 0x00 to 0xFF.
red	Variable that describes red. The value ranges from 0x00 to 0xFF.
green	Variable that describes green. The value ranges from 0x00 to 0xFF.
blue	Variable that describes blue. The value ranges from 0x00 to 0xFF.

Returns

Returns a 32-bit (ARGB) variable that describes the color.

Since

OH_Drawing_CreateFontCollection()

OH_Drawing_FontCollection* OH_Drawing_CreateFontCollection (void )

Description

Creates an OH_Drawing_FontCollection object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Returns

Returns the pointer to the OH_Drawing_FontCollection object created.

Since

OH_Drawing_CreateTextStyle()

OH_Drawing_TextStyle* OH_Drawing_CreateTextStyle (void )

Description

Creates an OH_Drawing_TextStyle object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Returns

Returns the pointer to the OH_Drawing_TextStyle object created.

Since

OH_Drawing_CreateTypography()

OH_Drawing_Typography* OH_Drawing_CreateTypography (OH_Drawing_TypographyCreate * )

Description

Creates an OH_Drawing_Typography object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TypographyCreate	Pointer to an OH_Drawing_TypographyCreate object.

Returns

Returns the pointer to the OH_Drawing_Typography object created.

Since

OH_Drawing_CreateTypographyHandler()

OH_Drawing_TypographyCreate* OH_Drawing_CreateTypographyHandler (OH_Drawing_TypographyStyle * , OH_Drawing_FontCollection *  )

Description

Creates an OH_Drawing_TypographyCreate object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TypographyStyle	Pointer to an OH_Drawing_TypographyStyle object.
OH_Drawing_FontCollection	Pointer to an OH_Drawing_FontCollection object.

Returns

Returns the pointer to the OH_Drawing_TypographyCreate object created.

Since

OH_Drawing_CreateTypographyStyle()

OH_Drawing_TypographyStyle* OH_Drawing_CreateTypographyStyle (void )

Description

Creates an OH_Drawing_TypographyStyle object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Returns

Returns the pointer to the OH_Drawing_TypographyStyle object created.

Since

OH_Drawing_DestroyFontCollection()

void OH_Drawing_DestroyFontCollection (OH_Drawing_FontCollection * )

Description

Destroys an OH_Drawing_FontCollection object and reclaims the memory occupied by the object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_FontCollection	Pointer to an OH_Drawing_FontCollection object.

Since

OH_Drawing_DestroyTextStyle()

void OH_Drawing_DestroyTextStyle (OH_Drawing_TextStyle * )

Description

Destroys an OH_Drawing_TextStyle object and reclaims the memory occupied by the object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TextStyle	Pointer to an OH_Drawing_TextStyle object.

Since

OH_Drawing_DestroyTypography()

void OH_Drawing_DestroyTypography (OH_Drawing_Typography * )

Description

Destroys an OH_Drawing_Typography object and reclaims the memory occupied by the object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Typography	Pointer to an OH_Drawing_Typography object.

Since

OH_Drawing_DestroyTypographyHandler()

void OH_Drawing_DestroyTypographyHandler (OH_Drawing_TypographyCreate * )

Description

Destroys an OH_Drawing_TypographyCreate object and reclaims the memory occupied by the object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TypographyCreate	Pointer to an OH_Drawing_TypographyCreate object.

Since

OH_Drawing_DestroyTypographyStyle()

void OH_Drawing_DestroyTypographyStyle (OH_Drawing_TypographyStyle * )

Description

Destroys an OH_Drawing_TypographyStyle object and reclaims the memory occupied by the object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TypographyStyle	Pointer to an OH_Drawing_TypographyStyle object.

Since

OH_Drawing_PathArcTo()

void OH_Drawing_PathArcTo (OH_Drawing_Path * , float x1, float y1, float x2, float y2, float startDeg, float sweepDeg )

Description

Draws an arc to a path. This is done by using angle arc mode. In this mode, a rectangle that encloses an ellipse is specified first, and then a start angle and a sweep angle are specified. The arc is a portion of the ellipse defined by the start angle and the sweep angle. By default, a line segment from the last point of the path to the start point of the arc is also added.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Path	Pointer to an OH_Drawing_Path object.
x1	X coordinate of the upper left corner of the rectangle.
y1	Y coordinate of the upper left corner of the rectangle.
x2	X coordinate of the lower right corner of the rectangle.
y2	Y coordinate of the lower right corner of the rectangle.
startDeg	Start angle, in degrees.
sweepDeg	Angle to sweep, in degrees.

Since

OH_Drawing_PathClose()

void OH_Drawing_PathClose (OH_Drawing_Path * )

Description

Closes a path. A line segment from the start point to the last point of the path is added.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Path	Pointer to an OH_Drawing_Path object.

Since

OH_Drawing_PathCreate()

OH_Drawing_Path* OH_Drawing_PathCreate (void )

Description

Creates an OH_Drawing_Path object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Returns

Returns the pointer to the OH_Drawing_Path object created.

Since

OH_Drawing_PathCubicTo()

void OH_Drawing_PathCubicTo (OH_Drawing_Path * , float ctrlX1, float ctrlY1, float ctrlX2, float ctrlY2, float endX, float endY )

Description

Draws a cubic Bezier curve from the last point of a path to the target point.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Path	Pointer to an OH_Drawing_Path object.
ctrlX1	X coordinate of the first control point.
ctrlY1	Y coordinate of the first control point.
ctrlX2	X coordinate of the second control point.
ctrlY2	Y coordinate of the second control point.
endX	X coordinate of the target point.
endY	Y coordinate of the target point.

Since

OH_Drawing_PathDestroy()

void OH_Drawing_PathDestroy (OH_Drawing_Path * )

Description

Destroys an OH_Drawing_Path object and reclaims the memory occupied by the object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Path	Pointer to an OH_Drawing_Path object.

Since

OH_Drawing_PathLineTo()

void OH_Drawing_PathLineTo (OH_Drawing_Path * , float x, float y )

Description

Draws a line segment from the last point of a path to the target point.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Path	Pointer to an OH_Drawing_Path object.
x	X coordinate of the target point.
y	Y coordinate of the target point.

Since

OH_Drawing_PathMoveTo()

void OH_Drawing_PathMoveTo (OH_Drawing_Path * , float x, float y )

Description

Sets the start point of a path.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Path	Pointer to an OH_Drawing_Path object.
x	X coordinate of the start point.
y	Y coordinate of the start point.

Since

OH_Drawing_PathQuadTo()

void OH_Drawing_PathQuadTo (OH_Drawing_Path * , float ctrlX, float ctrlY, float endX, float endY )

Description

Draws a quadratic Bezier curve from the last point of a path to the target point.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Path	Pointer to an OH_Drawing_Path object.
ctrlX	X coordinate of the control point.
ctrlY	Y coordinate of the control point.
endX	X coordinate of the target point.
endY	Y coordinate of the target point.

Since

OH_Drawing_PathReset()

void OH_Drawing_PathReset (OH_Drawing_Path * )

Description

Resets path data.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Path	Pointer to an OH_Drawing_Path object.

Since

OH_Drawing_PenCreate()

OH_Drawing_Pen* OH_Drawing_PenCreate (void )

Description

Creates an OH_Drawing_Pen object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Returns

Returns the pointer to the OH_Drawing_Pen object created.

Since

OH_Drawing_PenDestroy()

void OH_Drawing_PenDestroy (OH_Drawing_Pen * )

Description

Destroys an OH_Drawing_Pen object and reclaims the memory occupied by the object.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Pen	Pointer to an OH_Drawing_Pen object.

Since

OH_Drawing_PenGetCap()

OH_Drawing_PenLineCapStyle OH_Drawing_PenGetCap (const OH_Drawing_Pen * )

Description

Obtains the line cap style of a pen.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Pen	Pointer to an OH_Drawing_Pen object.

Returns

Returns the line cap style.

Since

OH_Drawing_PenGetColor()

uint32_t OH_Drawing_PenGetColor (const OH_Drawing_Pen * )

Description

Obtains the color of a pen. The color is used by the pen to outline a shape.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Pen	Pointer to an OH_Drawing_Pen object.

Returns

Returns a 32-bit (ARGB) variable that describes the color.

Since

OH_Drawing_PenGetJoin()

OH_Drawing_PenLineJoinStyle OH_Drawing_PenGetJoin (const OH_Drawing_Pen * )

Description

Obtains the line join style of a pen.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Pen	Pointer to an OH_Drawing_Pen object.

Returns

Returns the line join style.

Since

OH_Drawing_PenGetMiterLimit()

float OH_Drawing_PenGetMiterLimit (const OH_Drawing_Pen * )

Description

Obtains the stroke miter limit of a polyline drawn by a pen. When the corner type is bevel, a beveled corner is displayed if the miter limit is exceeded, and a mitered corner is displayed if the miter limit is not exceeded.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Pen	Pointer to an OH_Drawing_Pen object.

Returns

Returns the miter limit.

Since

OH_Drawing_PenGetWidth()

float OH_Drawing_PenGetWidth (const OH_Drawing_Pen * )

Description

Obtains the thickness of a pen. This thickness determines the width of the outline of a shape.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Pen	Pointer to an OH_Drawing_Pen object.

Returns

Returns the thickness.

Since

OH_Drawing_PenIsAntiAlias()

bool OH_Drawing_PenIsAntiAlias (const OH_Drawing_Pen * )

Description

Checks whether anti-aliasing is enabled for a pen. If anti-aliasing is enabled, edges will be drawn with partial transparency.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Pen	Pointer to an OH_Drawing_Pen object.

Returns

Returns true if anti-aliasing is enabled; returns false otherwise.

Since

OH_Drawing_PenSetAntiAlias()

void OH_Drawing_PenSetAntiAlias (OH_Drawing_Pen * , bool  )

Description

Enables or disables anti-aliasing for a pen. If anti-aliasing is enabled, edges will be drawn with partial transparency.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Pen	Pointer to an OH_Drawing_Pen object.
bool	Whether to enable anti-aliasing. The value true means to enable anti-aliasing, and false means the opposite.

Since

OH_Drawing_PenSetCap()

void OH_Drawing_PenSetCap (OH_Drawing_Pen * , OH_Drawing_PenLineCapStyle  )

Description

Sets the line cap style for a pen.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Pen	Pointer to an OH_Drawing_Pen object.
OH_Drawing_PenLineCapStyle	Variable that describes the line cap style.

Since

OH_Drawing_PenSetColor()

void OH_Drawing_PenSetColor (OH_Drawing_Pen * , uint32_t color )

Description

Sets the color for a pen. The color is used by the pen to outline a shape.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Pen	Pointer to an OH_Drawing_Pen object.
color	Color to set, which is a 32-bit (ARGB) variable.

Since

OH_Drawing_PenSetJoin()

void OH_Drawing_PenSetJoin (OH_Drawing_Pen * , OH_Drawing_PenLineJoinStyle  )

Description

Sets the line join style for a pen.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Pen	Pointer to an OH_Drawing_Pen object.
OH_Drawing_PenLineJoinStyle	Variable that describes the line join style.

Since

OH_Drawing_PenSetMiterLimit()

void OH_Drawing_PenSetMiterLimit (OH_Drawing_Pen * , float miter )

Description

Sets the stroke miter limit for a polyline drawn by a pen. When the corner type is bevel, a beveled corner is displayed if the miter limit is exceeded, and a mitered corner is displayed if the miter limit is not exceeded.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Pen	Pointer to an OH_Drawing_Pen object.
miter	Variable that describes the miter limit.

Since

OH_Drawing_PenSetWidth()

void OH_Drawing_PenSetWidth (OH_Drawing_Pen * , float width )

Description

Sets the thickness for a pen. This thickness determines the width of the outline of a shape.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Pen	Pointer to an OH_Drawing_Pen object.
width	Thickness to set, which is a variable.

Since

OH_Drawing_SetTextStyleBaseLine()

void OH_Drawing_SetTextStyleBaseLine (OH_Drawing_TextStyle * , int  )

Description

Sets the text baseline.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TextStyle	Pointer to an OH_Drawing_TextStyle object.
int	Text baseline to set. For details, see the enum OH_Drawing_TextBaseline.

Since

OH_Drawing_SetTextStyleColor()

void OH_Drawing_SetTextStyleColor (OH_Drawing_TextStyle * , uint32_t  )

Description

Sets the text color.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TextStyle	Pointer to an OH_Drawing_TextStyle object.
uint32_t	Color to set.

Since

OH_Drawing_SetTextStyleDecoration()

void OH_Drawing_SetTextStyleDecoration (OH_Drawing_TextStyle * , int  )

Description

Sets the text decoration.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TextStyle	Pointer to an OH_Drawing_TextStyle object.
int	Text decoration to set. For details, see the enum OH_Drawing_TextDecoration.

Since

OH_Drawing_SetTextStyleDecorationColor()

void OH_Drawing_SetTextStyleDecorationColor (OH_Drawing_TextStyle * , uint32_t  )

Description

Sets the color for the text decoration.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TextStyle	Pointer to an OH_Drawing_TextStyle object.
uint32_t	Color to set.

Since

OH_Drawing_SetTextStyleFontFamilies()

void OH_Drawing_SetTextStyleFontFamilies (OH_Drawing_TextStyle * , int , const char * fontFamilies[] )

Description

Sets the font families.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TextStyle	Pointer to an OH_Drawing_TextStyle object.
int	Number of font families to set.
fontFamilies	Pointer to the font families to set.

Since

OH_Drawing_SetTextStyleFontHeight()

void OH_Drawing_SetTextStyleFontHeight (OH_Drawing_TextStyle * , double  )

Description

Sets the font height.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TextStyle	Pointer to an OH_Drawing_TextStyle object.
double	Font height to set.

Since

OH_Drawing_SetTextStyleFontSize()

void OH_Drawing_SetTextStyleFontSize (OH_Drawing_TextStyle * , double  )

Description

Sets the font size.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TextStyle	Pointer to an OH_Drawing_TextStyle object.
double	Font size to set.

Since

OH_Drawing_SetTextStyleFontStyle()

void OH_Drawing_SetTextStyleFontStyle (OH_Drawing_TextStyle * , int  )

Description

Sets the font style.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TextStyle	Pointer to an OH_Drawing_TextStyle object.
int	Font style to set. For details, see the enum OH_Drawing_FontStyle.

Since

OH_Drawing_SetTextStyleFontWeight()

void OH_Drawing_SetTextStyleFontWeight (OH_Drawing_TextStyle * , int  )

Description

Sets the font weight.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TextStyle	Pointer to an OH_Drawing_TextStyle object.
int	Font weight to set. For details, see the enum OH_Drawing_FontWeight.

Since

OH_Drawing_SetTextStyleLocale()

void OH_Drawing_SetTextStyleLocale (OH_Drawing_TextStyle * , const char *  )

Description

Sets the locale.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TextStyle	Pointer to an OH_Drawing_TextStyle object.
char	Pointer to the locale to set.

Since

OH_Drawing_SetTypographyTextAlign()

void OH_Drawing_SetTypographyTextAlign (OH_Drawing_TypographyStyle * , int  )

Description

Sets the text alignment mode.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TypographyStyle	Pointer to an OH_Drawing_TypographyStyle object.
int	Text alignment mode to set. For details, see the enum OH_Drawing_TextAlign.

Since

OH_Drawing_SetTypographyTextDirection()

void OH_Drawing_SetTypographyTextDirection (OH_Drawing_TypographyStyle * , int  )

Description

Sets the text direction.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TypographyStyle	Pointer to an OH_Drawing_TypographyStyle object.
int	Text direction to set. For details, see the enum OH_Drawing_TextDirection.

Since

OH_Drawing_SetTypographyTextMaxLines()

void OH_Drawing_SetTypographyTextMaxLines (OH_Drawing_TypographyStyle * , int  )

Description

Sets the maximum number of lines in the text.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TypographyStyle	Pointer to an OH_Drawing_TypographyStyle object.
int	Maximum number of lines to set.

Since

OH_Drawing_TypographyGetAlphabeticBaseline()

double OH_Drawing_TypographyGetAlphabeticBaseline (OH_Drawing_Typography * )

Description

Obtains the alphabetic baseline.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Typography	Pointer to an OH_Drawing_Typography object.

Returns

Returns the alphabetic baseline.

Since

OH_Drawing_TypographyGetHeight()

double OH_Drawing_TypographyGetHeight (OH_Drawing_Typography * )

Description

Obtains the height.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Typography	Pointer to an OH_Drawing_Typography object.

Returns

Returns the height.

Since

OH_Drawing_TypographyGetIdeographicBaseline()

double OH_Drawing_TypographyGetIdeographicBaseline (OH_Drawing_Typography * )

Description

Obtains the ideographic baseline.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Typography	Pointer to an OH_Drawing_Typography object.

Returns

Returns the ideographic baseline.

Since

OH_Drawing_TypographyGetLongestLine()

Description

Obtains the longest line.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Typography	Pointer to an OH_Drawing_Typography object.

Returns

Returns the longest line.

Since

OH_Drawing_TypographyGetMaxIntrinsicWidth()

double OH_Drawing_TypographyGetMaxIntrinsicWidth (OH_Drawing_Typography * )

Description

Obtains the maximum intrinsic width.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Typography	Pointer to an OH_Drawing_Typography object.

Returns

Returns the maximum intrinsic width.

Since

OH_Drawing_TypographyGetMaxWidth()

double OH_Drawing_TypographyGetMaxWidth (OH_Drawing_Typography * )

Description

Obtains the maximum width.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Typography	Pointer to an OH_Drawing_Typography object.

Returns

Returns the maximum width.

Since

OH_Drawing_TypographyGetMinIntrinsicWidth()

double OH_Drawing_TypographyGetMinIntrinsicWidth (OH_Drawing_Typography * )

Description

Obtains the minimum intrinsic width.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Typography	Pointer to an OH_Drawing_Typography object.

Returns

Returns the minimum intrinsic width.

Since

OH_Drawing_TypographyHandlerAddText()

void OH_Drawing_TypographyHandlerAddText (OH_Drawing_TypographyCreate * , const char *  )

Description

Sets the text content.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TypographyCreate	Pointer to an OH_Drawing_TypographyCreate object.
char	Pointer to the text content to set.

Since

OH_Drawing_TypographyHandlerPopTextStyle()

void OH_Drawing_TypographyHandlerPopTextStyle (OH_Drawing_TypographyCreate * )

Description

Removes the topmost style in the stack, leaving the remaining styles in effect.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TypographyCreate	Pointer to an OH_Drawing_TypographyCreate object.

Since

OH_Drawing_TypographyHandlerPushTextStyle()

void OH_Drawing_TypographyHandlerPushTextStyle (OH_Drawing_TypographyCreate * , OH_Drawing_TextStyle *  )

Description

Sets the text style.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_TypographyCreate	Pointer to an OH_Drawing_TypographyCreate object.
OH_Drawing_TextStyle	Pointer to an OH_Drawing_TextStyle object.

Since

OH_Drawing_TypographyLayout()

void OH_Drawing_TypographyLayout (OH_Drawing_Typography * , double  )

Description

Lays out the typography.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Typography	Pointer to an OH_Drawing_Typography object.
double	Maximum text width to set.

Since

OH_Drawing_TypographyPaint()

void OH_Drawing_TypographyPaint (OH_Drawing_Typography * , OH_Drawing_Canvas * , double , double  )

Description

Paints text on the canvas.

@syscap SystemCapability.Graphic.Graphic2D.NativeDrawing

Parameters

Name	Description
OH_Drawing_Typography	Pointer to an OH_Drawing_Typography object.
OH_Drawing_Canvas	Pointer to an OH_Drawing_Canvas object.
double	X coordinate.
double	Y coordinate.