glTexParameteri — set texture parameters
C Specification
void glTexParameterf(GLenum target, GLenum pname, GLfloat param);
void glTexParameteri(GLenum target, GLenum pname, GLint param);
Parameters
target
Specifies the target texture,
which must be either GL_TEXTURE_1D, GL_TEXTURE_2D,
GL_TEXTURE_3D, or GL_TEXTURE_CUBE_MAP.
pname
Specifies the symbolic name of a single-valued texture parameter.
pname can be one of the following:
GL_TEXTURE_MIN_FILTER,
GL_TEXTURE_MAG_FILTER,
GL_TEXTURE_MIN_LOD,
GL_TEXTURE_MAX_LOD,
GL_TEXTURE_BASE_LEVEL,
GL_TEXTURE_MAX_LEVEL,
GL_TEXTURE_WRAP_S,
GL_TEXTURE_WRAP_T,
GL_TEXTURE_WRAP_R,
GL_TEXTURE_PRIORITY,
GL_TEXTURE_COMPARE_MODE,
GL_TEXTURE_COMPARE_FUNC,
GL_DEPTH_TEXTURE_MODE, or
GL_GENERATE_MIPMAP.
param
Specifies the value of pname.
C Specification
void glTexParameterfv(GLenum target, GLenum pname, const GLfloat * params);
void glTexParameteriv(GLenum target, GLenum pname, const GLint * params);
Parameters
target
Specifies the target texture,
which must be either GL_TEXTURE_1D, GL_TEXTURE_2D or
GL_TEXTURE_3D.
pname
Specifies the symbolic name of a texture parameter.
pname can be one of the following:
GL_TEXTURE_MIN_FILTER,
GL_TEXTURE_MAG_FILTER,
GL_TEXTURE_MIN_LOD,
GL_TEXTURE_MAX_LOD,
GL_TEXTURE_BASE_LEVEL,
GL_TEXTURE_MAX_LEVEL,
GL_TEXTURE_WRAP_S,
GL_TEXTURE_WRAP_T,
GL_TEXTURE_WRAP_R,
GL_TEXTURE_BORDER_COLOR,
GL_TEXTURE_PRIORITY,
GL_TEXTURE_COMPARE_MODE,
GL_TEXTURE_COMPARE_FUNC,
GL_DEPTH_TEXTURE_MODE, or
GL_GENERATE_MIPMAP.
params
Specifies a pointer to an array where the value or values of pname
are stored.
Details
Refer to http://www.opengl.org/sdk/docs/man/xhtml/glTexParameter.xml
Examples
public class Text3d {private IntBuffer mVertexBuffer;
private IntBuffer mColorBuffer;
private ByteBuffer mIndexBuffer;
private FloatBuffer mfTexBuffer;
private int mTextureID;
public Text3d(){
int one = 50;
int vertices[] = {
0, one, 0,
one, one, 0,
0, 0, 0,
one, 0, 0,
};
float tex[] = {
0.0f ,0.0f,
1.0f,0.0f,
0.0f ,1.0f,
1.0f,1.0f,
};
one = 100000;
int colors[] = {
one, one, one, one,
one, one, one, one,
one, one, one, one,
one, one, one, one,
};
byte indices[] = {
0, 1, 2,
1, 3, 2,
};
ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length*4);
vbb.order(ByteOrder.nativeOrder());
mVertexBuffer = vbb.asIntBuffer();
mVertexBuffer.put(vertices);
mVertexBuffer.position(0);
ByteBuffer tbb = ByteBuffer.allocateDirect(tex.length*4);
tbb.order(ByteOrder.nativeOrder());
mfTexBuffer = tbb.asFloatBuffer();
mfTexBuffer.put(tex);
mfTexBuffer.position(0);
ByteBuffer cbb = ByteBuffer.allocateDirect(colors.length*4);
cbb.order(ByteOrder.nativeOrder());
mColorBuffer = cbb.asIntBuffer();
mColorBuffer.put(colors);
mColorBuffer.position(0);
mIndexBuffer = ByteBuffer.allocateDirect(indices.length);
mIndexBuffer.put(indices);
mIndexBuffer.position(0);
}
public void TexCreate(GL10 gl,Context mContext)
{
int[] textures = new int[1];
gl.glGenTextures(1, textures, 0);
mTextureID = textures[0];
gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureID);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER,
GL10.GL_NEAREST);
gl.glTexParameterf(GL10.GL_TEXTURE_2D,
GL10.GL_TEXTURE_MAG_FILTER,
GL10.GL_LINEAR);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S,
GL10.GL_CLAMP_TO_EDGE);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T,
GL10.GL_CLAMP_TO_EDGE);
gl.glTexEnvf(GL10.GL_TEXTURE_ENV, GL10.GL_TEXTURE_ENV_MODE,
GL10.GL_REPLACE);
Bitmap mBitmap;
Canvas mCanvas;
Bitmap.Config config = Bitmap.Config.ARGB_8888;
mBitmap = Bitmap.createBitmap(128, 128, config);
mCanvas = new Canvas(mBitmap);
mBitmap.eraseColor(0);
mCanvas.drawColor(0x00ffffff);
Paint Pnt = new Paint();
Pnt.setColor(0xff00ff00);
Pnt.setTextSize(128);
Pnt.setAntiAlias(false);
Pnt.setTextScaleX(1);
mCanvas.drawText("B", 0, 128, Pnt);
GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, mBitmap, 0);
mBitmap.recycle();
}
public void draw(GL10 gl)
{
gl.glFrontFace(GL10.GL_CW);
gl.glEnable(GL10.GL_TEXTURE_2D);
gl.glColor4f(1f, 1f, 1f, 1f);
gl.glTexEnvx(GL10.GL_TEXTURE_ENV, GL10.GL_TEXTURE_ENV_MODE,
GL10.GL_MODULATE);
gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureID);
gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
gl.glActiveTexture(GL10.GL_TEXTURE0);
gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, mfTexBuffer);
gl.glVertexPointer(3, GL10.GL_FIXED, 0, mVertexBuffer);
gl.glColorPointer(4, GL10.GL_FIXED, 0, mColorBuffer);
gl.glDrawElements(GL10.GL_TRIANGLES, 6, GL10.GL_UNSIGNED_BYTE, mIndexBuffer);
}
}
