com.android.grafika.gles

Class Texture2dProgram

java.lang.Object

com.android.grafika.gles.Texture2dProgram

public class Texture2dProgram
extends Object

GL program and supporting functions for textured 2D shapes.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Texture2dProgram.ProgramType

Field Summary

Fields

Modifier and Type	Field and Description
static int	KERNEL_SIZE

Constructor Summary

Constructors

Constructor and Description
Texture2dProgram(Texture2dProgram.ProgramType programType) Prepares the program in the current EGL context.

Method Summary

Modifier and Type	Method and Description
int	createTextureObject() Creates a texture object suitable for use with this program.
void	draw(float[] mvpMatrix, FloatBuffer vertexBuffer, int firstVertex, int vertexCount, int coordsPerVertex, int vertexStride, float[] texMatrix, FloatBuffer texBuffer, int textureId, int texStride) Issues the draw call.
Texture2dProgram.ProgramType	getProgramType() Returns the program type.
void	release() Releases the program.
void	setKernel(float[] values, float colorAdj) Configures the convolution filter values.
void	setTexSize(int width, int height) Sets the size of the texture.

Methods inherited from class java.lang.Object

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

Field Detail

KERNEL_SIZE

public static final int KERNEL_SIZE

See Also:

Constant Field Values

Constructor Detail

Texture2dProgram

public Texture2dProgram(Texture2dProgram.ProgramType programType)

Prepares the program in the current EGL context.

Method Detail

release

public void release()

Releases the program.

The appropriate EGL context must be current (i.e. the one that was used to create the program).

getProgramType

public Texture2dProgram.ProgramType getProgramType()

Returns the program type.

createTextureObject

public int createTextureObject()

Creates a texture object suitable for use with this program.

On exit, the texture will be bound.

setKernel

public void setKernel(float[] values,
                      float colorAdj)

Configures the convolution filter values.

Parameters:

values - Normalized filter values; must be KERNEL_SIZE elements.

setTexSize

public void setTexSize(int width,
                       int height)

Sets the size of the texture. This is used to find adjacent texels when filtering.

draw

public void draw(float[] mvpMatrix,
                 FloatBuffer vertexBuffer,
                 int firstVertex,
                 int vertexCount,
                 int coordsPerVertex,
                 int vertexStride,
                 float[] texMatrix,
                 FloatBuffer texBuffer,
                 int textureId,
                 int texStride)

Issues the draw call. Does the full setup on every call.

Parameters:

mvpMatrix - The 4x4 projection matrix.

vertexBuffer - Buffer with vertex position data.

firstVertex - Index of first vertex to use in vertexBuffer.

vertexCount - Number of vertices in vertexBuffer.

coordsPerVertex - The number of coordinates per vertex (e.g. x,y is 2).

vertexStride - Width, in bytes, of the position data for each vertex (often vertexCount * sizeof(float)).

texMatrix - A 4x4 transformation matrix for texture coords. (Primarily intended for use with SurfaceTexture.)

texBuffer - Buffer with vertex texture data.

texStride - Width, in bytes, of the texture data for each vertex.