org.oscim.renderer

Class GLUtils

java.lang.Object

org.oscim.renderer.GLUtils

public class GLUtils
extends java.lang.Object

Utility functions

Constructor Summary

Constructors

Constructor and Description
GLUtils()

Method Summary

Modifier and Type	Method and Description
static void	changeSaturation(float[] color, float change) public-domain function by Darel Rex Finley from http://alienryderflex.com/saturation.html
static int	checkFramebufferStatus(java.lang.String op) Check the status of current framebuffer.
static void	checkGlError(java.lang.String op) Check GL error.
static boolean	checkGlError(java.lang.String op, int id) Check GL error.
static java.util.List<java.lang.Integer>	checkGlErrors(java.lang.String op) Check GL errors.
static float[]	colorToFloat(int color)
static float[]	colorToFloatP(int color)
static java.lang.String	getFramebufferStatusString(int status)
static java.lang.String	getGlErrorString(int error)
static void	glDeleteBuffers(int num, int[] ids)
static void	glDeleteFrameBuffers(int num, int[] ids)
static void	glDeleteRenderBuffers(int num, int[] ids)
static void	glDeleteTextures(int num, int[] ids)
static void	glDrawBuffers(int num, int[] glEnum) Specifies a list of color buffers to be drawn into.
static int[]	glGenBuffers(int num)
static int[]	glGenFrameBuffers(int num)
static int[]	glGenRenderBuffers(int num)
static int[]	glGenTextures(int num)
static void	glUniform3fv(int location, int count, float[] val)
static void	glUniform4fv(int location, int count, float[] val)
static int	loadTexture(byte[] pixel, int width, int height, int format, int min_filter, int mag_filter, int wrap_s, int wrap_t)
static void	setColor(int handle, float[] c, float alpha)
static void	setColor(int location, int color) Set int color argb to uniform wxyz.
static void	setColor(int location, int color, float alpha)
static void	setColorBlend(int location, int color1, int color2, float mix)
static void	setTextureParameter(int min_filter, int mag_filter, int wrap_s, int wrap_t)

Methods inherited from class java.lang.Object

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

Constructor Detail

GLUtils

public GLUtils()

Method Detail

setColor

public static void setColor(int location,
                            int color)

Set int color argb to uniform wxyz.

setColor

public static void setColor(int location,
                            int color,
                            float alpha)

setColorBlend

public static void setColorBlend(int location,
                                 int color1,
                                 int color2,
                                 float mix)

setTextureParameter

public static void setTextureParameter(int min_filter,
                                       int mag_filter,
                                       int wrap_s,
                                       int wrap_t)

loadTexture

public static int loadTexture(byte[] pixel,
                              int width,
                              int height,
                              int format,
                              int min_filter,
                              int mag_filter,
                              int wrap_s,
                              int wrap_t)

checkFramebufferStatus

public static int checkFramebufferStatus(java.lang.String op)

Check the status of current framebuffer. See: https://www.khronos.org/registry/OpenGL-Refpages/es2.0/xhtml/glCheckFramebufferStatus.xml

Parameters:

op - the operation which should be debugged

Returns:

the status code

getFramebufferStatusString

public static java.lang.String getFramebufferStatusString(int status)

Parameters:

status - the status code of a framebuffer

Returns:

the status code as string

checkGlError

public static void checkGlError(java.lang.String op)

Check GL error. See: https://www.khronos.org/opengl/wiki/OpenGL_Error

Parameters:

op - the operation which should be debugged

checkGlError

public static boolean checkGlError(java.lang.String op,
                                   int id)

Check GL error. See: https://www.khronos.org/opengl/wiki/OpenGL_Error

Parameters:

op - the operation which should be debugged

id - the error to be found

Returns:

true if error was found

checkGlErrors

public static java.util.List<java.lang.Integer> checkGlErrors(java.lang.String op)

Check GL errors. See: https://www.khronos.org/opengl/wiki/OpenGL_Error

Parameters:

op - the operation which should be debugged

Returns:

the OpenGL error codes

getGlErrorString

public static java.lang.String getGlErrorString(int error)

Parameters:

error - the error code of OpenGL

Returns:

the error code as string

setColor

public static void setColor(int handle,
                            float[] c,
                            float alpha)

colorToFloat

public static float[] colorToFloat(int color)

colorToFloatP

public static float[] colorToFloatP(int color)

changeSaturation

public static void changeSaturation(float[] color,
                                    float change)

public-domain function by Darel Rex Finley from http://alienryderflex.com/saturation.html

Parameters:

color - The passed-in RGB values can be on any desired scale, such as 0 to 1, or 0 to 255.

change - 0.0 creates a black-and-white image. 0.5 reduces the color saturation by half. 1.0 causes no change. 2.0 doubles the color saturation.

glUniform3fv

public static void glUniform3fv(int location,
                                int count,
                                float[] val)

glUniform4fv

public static void glUniform4fv(int location,
                                int count,
                                float[] val)

glGenBuffers

public static int[] glGenBuffers(int num)

glDeleteBuffers

public static void glDeleteBuffers(int num,
                                   int[] ids)

glGenFrameBuffers

public static int[] glGenFrameBuffers(int num)

glDeleteFrameBuffers

public static void glDeleteFrameBuffers(int num,
                                        int[] ids)

glGenRenderBuffers

public static int[] glGenRenderBuffers(int num)

glDeleteRenderBuffers

public static void glDeleteRenderBuffers(int num,
                                         int[] ids)

glGenTextures

public static int[] glGenTextures(int num)

glDeleteTextures

public static void glDeleteTextures(int num,
                                    int[] ids)

glDrawBuffers

public static void glDrawBuffers(int num,
                                 int[] glEnum)

Specifies a list of color buffers to be drawn into.

Parameters:

num - Specifies the number of buffers in bufs.

glEnum - Points to an array of symbolic constants specifying the buffers into which fragment colors or data values will be written.