public static boolean isProgramStatusValid(final GL _gl, final int programObj, final int name) {
final GL2ES2 gl = _gl.getGL2ES2();
final int[] ires = new int[1];
gl.glGetProgramiv(programObj, name, ires, 0);
return ires[0] == 1;
}
public static boolean createAndLoadShader(
final GL _gl,
final IntBuffer shader,
final int shaderType,
final int binFormat,
final java.nio.Buffer bin,
final PrintStream verboseOut) {
final GL2ES2 gl = _gl.getGL2ES2();
int err = gl.glGetError(); // flush previous errors ..
if (err != GL.GL_NO_ERROR && null != verboseOut) {
verboseOut.println("createAndLoadShader: Pre GL Error: 0x" + Integer.toHexString(err));
}
createShader(gl, shaderType, shader);
err = gl.glGetError();
if (err != GL.GL_NO_ERROR) {
throw new GLException(
"createAndLoadShader: CreateShader failed, GL Error: 0x" + Integer.toHexString(err));
}
shaderBinary(gl, shader, binFormat, bin);
err = gl.glGetError();
if (err != GL.GL_NO_ERROR && null != verboseOut) {
verboseOut.println(
"createAndLoadShader: ShaderBinary failed, GL Error: 0x" + Integer.toHexString(err));
}
return err == GL.GL_NO_ERROR;
}
public static void shaderSource(final GL _gl, final int shader, final CharSequence[] source) {
final GL2ES2 gl = _gl.getGL2ES2();
if (!isShaderCompilerAvailable(_gl)) {
throw new GLException("No compiler is available");
}
final int count = (null != source) ? source.length : 0;
if (count == 0) {
throw new GLException("No sources specified");
}
final IntBuffer lengths = Buffers.newDirectIntBuffer(count);
for (int i = 0; i < count; i++) {
lengths.put(i, source[i].length());
}
if (source instanceof String[]) {
// rare case ..
gl.glShaderSource(shader, count, (String[]) source, lengths);
} else {
final String[] tmp = new String[source.length];
for (int i = source.length - 1; i >= 0; i--) {
final CharSequence csq = source[i];
if (csq instanceof String) {
// if ShaderCode.create(.. mutableStringBuilder == false )
tmp[i] = (String) csq;
} else {
// if ShaderCode.create(.. mutableStringBuilder == true )
tmp[i] = source[i].toString();
}
}
gl.glShaderSource(shader, count, tmp, lengths);
}
}
/** Returns true if a hader compiler is available, otherwise false. */
public static boolean isShaderCompilerAvailable(final GL _gl) {
final GL2ES2 gl = _gl.getGL2ES2();
final ProfileInformation info = getProfileInformation(gl);
if (null == info.shaderCompilerAvailable) {
if (gl.isGLES2()) {
boolean queryOK = false;
try {
final byte[] param = new byte[1];
gl.glGetBooleanv(GL2ES2.GL_SHADER_COMPILER, param, 0);
final int err = gl.glGetError();
boolean v = GL.GL_NO_ERROR == err && param[0] != (byte) 0x00;
if (!v) {
final Set<Integer> bfs = getShaderBinaryFormats(gl);
if (bfs.size() == 0) {
// no supported binary formats, hence a compiler must be available!
v = true;
}
}
info.shaderCompilerAvailable = Boolean.valueOf(v);
queryOK = true;
} catch (final GLException gle) {
System.err.println("Caught exception on thread " + Thread.currentThread().getName());
gle.printStackTrace();
}
if (!queryOK) {
info.shaderCompilerAvailable = Boolean.valueOf(true);
}
} else if (gl.isGL2ES2()) {
info.shaderCompilerAvailable = new Boolean(true);
} else {
throw new GLException("Invalid OpenGL profile");
}
}
return info.shaderCompilerAvailable.booleanValue();
}
/**
* If supported, queries the natively supported shader binary formats using {@link
* GL2ES2#GL_NUM_SHADER_BINARY_FORMATS} and {@link GL2ES2#GL_SHADER_BINARY_FORMATS} via {@link
* GL2ES2#glGetIntegerv(int, int[], int)}.
*/
public static Set<Integer> getShaderBinaryFormats(final GL _gl) {
final GL2ES2 gl = _gl.getGL2ES2();
final ProfileInformation info = getProfileInformation(gl);
if (null == info.shaderBinaryFormats) {
info.shaderBinaryFormats = new HashSet<Integer>();
if (gl.isGLES2Compatible()) {
try {
final int[] param = new int[1];
gl.glGetIntegerv(GL2ES2.GL_NUM_SHADER_BINARY_FORMATS, param, 0);
final int err = gl.glGetError();
final int numFormats = GL.GL_NO_ERROR == err ? param[0] : 0;
if (numFormats > 0) {
final int[] formats = new int[numFormats];
gl.glGetIntegerv(GL2ES2.GL_SHADER_BINARY_FORMATS, formats, 0);
for (int i = 0; i < numFormats; i++) {
info.shaderBinaryFormats.add(Integer.valueOf(formats[i]));
}
}
} catch (final GLException gle) {
System.err.println("Caught exception on thread " + Thread.currentThread().getName());
gle.printStackTrace();
}
}
}
return info.shaderBinaryFormats;
}
public static boolean isShaderStatusValid(
final GL _gl, final int shaderObj, final int name, final PrintStream verboseOut) {
final GL2ES2 gl = _gl.getGL2ES2();
final int[] ires = new int[1];
gl.glGetShaderiv(shaderObj, name, ires, 0);
final boolean res = ires[0] == 1;
if (!res && null != verboseOut) {
verboseOut.println("Shader status invalid: " + getShaderInfoLog(gl, shaderObj));
}
return res;
}
public static String getProgramInfoLog(final GL _gl, final int programObj) {
final GL2ES2 gl = _gl.getGL2ES2();
final int[] infoLogLength = new int[1];
gl.glGetProgramiv(programObj, GL2ES2.GL_INFO_LOG_LENGTH, infoLogLength, 0);
if (infoLogLength[0] == 0) {
return "(no info log)";
}
final int[] charsWritten = new int[1];
final byte[] infoLogBytes = new byte[infoLogLength[0]];
gl.glGetProgramInfoLog(programObj, infoLogLength[0], charsWritten, 0, infoLogBytes, 0);
return new String(infoLogBytes, 0, charsWritten[0]);
}
/**
* Performs {@link GL2ES2#glValidateProgram(int)}
*
* <p>One shall only call this method while debugging and only if all required resources by the
* shader are set.
*
* <p>Note: It is possible that a working shader program will fail validation. This has been
* experienced on NVidia APX2500 and Tegra2.
*
* @see GL2ES2#glValidateProgram(int)
*/
public static boolean isProgramExecStatusValid(
final GL _gl, final int programObj, final PrintStream verboseOut) {
final GL2ES2 gl = _gl.getGL2ES2();
gl.glValidateProgram(programObj);
if (!isProgramStatusValid(gl, programObj, GL2ES2.GL_VALIDATE_STATUS)) {
if (null != verboseOut) {
verboseOut.println(
"Program validation failed: "
+ programObj
+ "\n\t"
+ getProgramInfoLog(gl, programObj));
}
return false;
}
return true;
}
public static boolean isProgramLinkStatusValid(
final GL _gl, final int programObj, final PrintStream verboseOut) {
final GL2ES2 gl = _gl.getGL2ES2();
if (!gl.glIsProgram(programObj)) {
if (null != verboseOut) {
verboseOut.println("Program name invalid: " + programObj);
}
return false;
}
if (!isProgramStatusValid(gl, programObj, GL2ES2.GL_LINK_STATUS)) {
if (null != verboseOut) {
verboseOut.println(
"Program link failed: " + programObj + "\n\t" + getProgramInfoLog(gl, programObj));
}
return false;
}
return true;
}
public static void shaderBinary(
final GL _gl, final IntBuffer shaders, final int binFormat, final java.nio.Buffer bin) {
final GL2ES2 gl = _gl.getGL2ES2();
if (getShaderBinaryFormats(gl).size() <= 0) {
throw new GLException("No binary formats are supported");
}
final int shaderNum = shaders.remaining();
if (shaderNum <= 0) {
throw new GLException("No shaders specified");
}
if (null == bin) {
throw new GLException("Null shader binary");
}
final int binLength = bin.remaining();
if (0 >= binLength) {
throw new GLException("Empty shader binary (remaining == 0)");
}
gl.glShaderBinary(shaderNum, shaders, binFormat, bin, binLength);
}
public static boolean createAndCompileShader(
final GL _gl,
final IntBuffer shader,
final int shaderType,
final CharSequence[][] sources,
final PrintStream verboseOut) {
final GL2ES2 gl = _gl.getGL2ES2();
int err = gl.glGetError(); // flush previous errors ..
if (err != GL.GL_NO_ERROR && null != verboseOut) {
verboseOut.println("createAndCompileShader: Pre GL Error: 0x" + Integer.toHexString(err));
}
createShader(gl, shaderType, shader);
err = gl.glGetError();
if (err != GL.GL_NO_ERROR) {
throw new GLException(
"createAndCompileShader: CreateShader failed, GL Error: 0x" + Integer.toHexString(err));
}
shaderSource(gl, shader, sources);
err = gl.glGetError();
if (err != GL.GL_NO_ERROR) {
throw new GLException(
"createAndCompileShader: ShaderSource failed, GL Error: 0x" + Integer.toHexString(err));
}
compileShader(gl, shader);
err = gl.glGetError();
if (err != GL.GL_NO_ERROR && null != verboseOut) {
verboseOut.println(
"createAndCompileShader: CompileShader failed, GL Error: 0x" + Integer.toHexString(err));
}
return isShaderStatusValid(gl, shader, GL2ES2.GL_COMPILE_STATUS, verboseOut)
&& err == GL.GL_NO_ERROR;
}
public static void deleteShader(final GL _gl, final IntBuffer shaders) {
final GL2ES2 gl = _gl.getGL2ES2();
for (int i = shaders.position(); i < shaders.limit(); i++) {
gl.glDeleteShader(shaders.get(i));
}
}
public static void detachShader(final GL _gl, final int program, final IntBuffer shaders) {
final GL2ES2 gl = _gl.getGL2ES2();
for (int i = shaders.position(); i < shaders.limit(); i++) {
gl.glDetachShader(program, shaders.get(i));
}
}
public static void createShader(final GL _gl, final int type, final IntBuffer shaders) {
final GL2ES2 gl = _gl.getGL2ES2();
for (int i = shaders.position(); i < shaders.limit(); i++) {
shaders.put(i, gl.glCreateShader(type));
}
}