ej.microvg

Class LLVGPainter

java.lang.Object

ej.microvg.LLVGPainter

public class LLVGPainter
extends java.lang.Object

This class provides implementations for the native methods of MicroVG library which perform some drawings.

It follows the rules described in LLUIPainter.

Field Summary

Fields

Modifier and Type	Field and Description
static int	RESOURCE_CLOSED Value returned when resource is closed
static int	RETURN_SUCCESS Value returned on success.

Method Summary

Modifier and Type	Method and Description
static void	drawGradient(byte[] gcArray, byte[] path, int x, int y, float[] matrix, int fillRule, int alpha, int blend, int[] gradientData, float[] gradientMatrix) Draws a path filled with a linear gradient.
static int	drawGradientString(byte[] gcArray, char[] string, int face, float size, float x, float y, float[] matrix, int alpha, int blendMode, float letterSpacing, int[] gradientData, float[] gradientMatrix) Draws a string with a linear gradient.
static int	drawGradientStringOnCircle(byte[] gcArray, char[] string, int face, float size, int x, int y, float[] matrix, int alpha, int blendMode, float letterSpacing, float radius, int direction, int[] gradientData, float[] gradientMatrix) Draws a string along a circle, with a linear gradient.
static int	drawImage(byte[] gcArray, byte[] sniContext, int x, int y, float[] matrix, int alpha, long elapsedTime, float[] colorMatrix) Draws an image with transformation and opacity.
static void	drawPath(byte[] gcArray, byte[] path, int x, int y, float[] matrix, int fillRule, int blend, int color) Draws a path filled with the given color.
static int	drawString(byte[] gcArray, char[] string, int face, float size, float x, float y, float[] matrix, int alpha, int blendMode, float letterSpacing) Draws a string with the color of the graphics context.
static int	drawStringOnCircle(byte[] gcArray, char[] string, int face, float size, int x, int y, float[] matrix, int alpha, int blendMode, float letterSpacing, float radius, int direction) Draws a string along a circle, with the color of the graphics context.
static void	refreshContent(java.lang.Object array) Refreshes an array.
static void	refreshContent(java.lang.Object array, int offset, int length) Refreshes a range of an array.
static float[]	refreshMatrix(float[] matrix) Refreshes the matrix given by the application.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

RETURN_SUCCESS

public static final int RETURN_SUCCESS

Value returned on success.

See Also:

Constant Field Values

RESOURCE_CLOSED

public static final int RESOURCE_CLOSED

Value returned when resource is closed

See Also:

Constant Field Values

Method Detail

drawPath

public static void drawPath(byte[] gcArray,
                            byte[] path,
                            int x,
                            int y,
                            float[] matrix,
                            int fillRule,
                            int blend,
                            int color)

Draws a path filled with the given color.

The specified path will be transformed by the given matrix and drawn into the specified target buffer using the supplied color.

Parameters:

gcArray - the destination

path - the path to draw

x - the destination X coordinate

y - the destination Y coordinate

matrix - the deformation to apply

fillRule - the fill type

blend - the blend mode

color - the color to apply (with an opacity)

drawGradient

public static void drawGradient(byte[] gcArray,
                                byte[] path,
                                int x,
                                int y,
                                float[] matrix,
                                int fillRule,
                                int alpha,
                                int blend,
                                int[] gradientData,
                                float[] gradientMatrix)

Draws a path filled with a linear gradient.

The specified path will be transformed by the given matrix and filled by the transformed gradient pattern.

Parameters:

gcArray - the destination

path - the path to draw

x - the destination X coordinate

y - the destination Y coordinate

matrix - the deformation to apply

fillRule - the fill type

alpha - the global opacity to apply

blend - the blend mode

gradientData - the gradient data

gradientMatrix - the gradient matrix (can be null)

drawString

public static int drawString(byte[] gcArray,
                             char[] string,
                             int face,
                             float size,
                             float x,
                             float y,
                             float[] matrix,
                             int alpha,
                             int blendMode,
                             float letterSpacing)

Draws a string with the color of the graphics context.

Parameters:

gcArray - the graphics context to draw on

string - the array of characters to draw

face - the font face to use

size - the font size, in pixels

x - the destination X coordinate

y - the destination Y coordinate

matrix - the transformation matrix to apply (can be null)

alpha - the global opacity rendering value

blendMode - the blend mode to use

letterSpacing - the extra letter spacing to use

Returns:

RETURN_SUCCESS on success or an error code

drawGradientString

public static int drawGradientString(byte[] gcArray,
                                     char[] string,
                                     int face,
                                     float size,
                                     float x,
                                     float y,
                                     float[] matrix,
                                     int alpha,
                                     int blendMode,
                                     float letterSpacing,
                                     int[] gradientData,
                                     float[] gradientMatrix)

Draws a string with a linear gradient.

Parameters:

gcArray - the graphics context to draw on

string - the array of characters to draw

face - the font face to use

size - the font size, in pixels

x - the destination X coordinate

y - the destination Y coordinate

matrix - the transformation matrix to apply

alpha - the global opacity rendering value

blendMode - the blend mode to use

letterSpacing - the extra letter spacing to use

gradientData - the gradient to apply

gradientMatrix - the gradient deformation, may be null (means identity)

Returns:

RETURN_SUCCESS on success or an error code

drawStringOnCircle

public static int drawStringOnCircle(byte[] gcArray,
                                     char[] string,
                                     int face,
                                     float size,
                                     int x,
                                     int y,
                                     float[] matrix,
                                     int alpha,
                                     int blendMode,
                                     float letterSpacing,
                                     float radius,
                                     int direction)

Draws a string along a circle, with the color of the graphics context.

Parameters:

gcArray - the graphics context to draw on

string - the array of characters to draw

face - the font face to use

size - the font size, in pixels

x - the destination X coordinate

y - the destination Y coordinate

matrix - the transformation matrix to apply

alpha - the global opacity rendering value

blendMode - the blend mode to use

letterSpacing - the extra letter spacing to use

radius - the radius of the circle

direction - the direction of the text along the circle

Returns:

RETURN_SUCCESS on success or an error code

drawGradientStringOnCircle

public static int drawGradientStringOnCircle(byte[] gcArray,
                                             char[] string,
                                             int face,
                                             float size,
                                             int x,
                                             int y,
                                             float[] matrix,
                                             int alpha,
                                             int blendMode,
                                             float letterSpacing,
                                             float radius,
                                             int direction,
                                             int[] gradientData,
                                             float[] gradientMatrix)

Draws a string along a circle, with a linear gradient.

Parameters:

gcArray - the graphics context to draw on

string - the array of characters to draw

face - the font face to use

size - the font size, in pixels

x - the destination X coordinate

y - the destination Y coordinate

matrix - the transformation matrix to apply

alpha - the global opacity rendering value

blendMode - the blend mode to use

letterSpacing - the extra letter spacing to use

radius - the radius of the circle

direction - the direction of the text along the circle

gradientData - the gradient to apply

gradientMatrix - the gradient deformation, may be null (means identity)

Returns:

RETURN_SUCCESS on success or an error code

drawImage

public static int drawImage(byte[] gcArray,
                            byte[] sniContext,
                            int x,
                            int y,
                            float[] matrix,
                            int alpha,
                            long elapsedTime,
                            float[] colorMatrix)

Draws an image with transformation and opacity. Optionally apply an animation and / or a color filtering.

Parameters:

gcArray - the graphics context to draw on

sniContext - the image to draw

x - the destination X coordinate

y - the destination Y coordinate

matrix - the transformation matrix to apply

alpha - the global opacity rendering value

elapsedTime - the elapsed time since the beginning of the animation, in milliseconds

colorMatrix - the color matrix used to transform colors

Returns:

RETURN_SUCCESS on success or an error code

refreshMatrix

public static float[] refreshMatrix(float[] matrix)

Refreshes the matrix given by the application. If the matrix is null, returns the unique instance of the identity matrix.

Parameters:

matrix - the matrix to refresh

Returns:

the refreshed matrix or the identity matrix

refreshContent

public static void refreshContent(java.lang.Object array)

Refreshes an array. The array can be null (nothing to refresh).

Parameters:

array - the array to refresh

refreshContent

public static void refreshContent(java.lang.Object array,
                                  int offset,
                                  int length)

Refreshes a range of an array.

Parameters:

array - the array to refresh

offset - the start index of the range

length - the length of the range