/**
* Helper function to compile and link a program.
*
* @param vertexShaderHandle An OpenGL handle to an already-compiled vertex shader.
* @param fragmentShaderHandle An OpenGL handle to an already-compiled fragment shader.
* @param attributes Attributes that need to be bound to the program.
* @return An OpenGL handle to the program.
*/
private int createAndLinkProgram(
final int vertexShaderHandle, final int fragmentShaderHandle, final String[] attributes) {
int programHandle = GLES20.glCreateProgram();
if (programHandle != 0) {
// Bind the vertex shader to the program.
GLES20.glAttachShader(programHandle, vertexShaderHandle);
// Bind the fragment shader to the program.
GLES20.glAttachShader(programHandle, fragmentShaderHandle);
// Bind attributes
if (attributes != null) {
final int size = attributes.length;
for (int i = 0; i < size; i++) {
GLES20.glBindAttribLocation(programHandle, i, attributes[i]);
}
}
// Link the two shaders together into a program.
GLES20.glLinkProgram(programHandle);
// Get the link status.
final int[] linkStatus = new int[1];
GLES20.glGetProgramiv(programHandle, GLES20.GL_LINK_STATUS, linkStatus, 0);
// If the link failed, delete the program.
if (linkStatus[0] == 0) {
GLES20.glDeleteProgram(programHandle);
programHandle = 0;
}
}
if (programHandle == 0) {
throw new RuntimeException("Error creating program.");
}
return programHandle;
}
@Override
public void glBindAttribLocation(int program, int index, String name) {
GLES20.glBindAttribLocation(program, index, name);
}
public void onSurfaceCreated(GL10 gl, EGLConfig config) {
// Set the background frame color
GLES20.glClearColor(1.0f, 1.0f, 0.0f, 1.0f);
// Set the viewport size.
GLES20.glViewport(0, 0, 2444, 2444);
// instantiate the vertex and frag shaders
int vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, vertexShaderCode);
int fragmentShader = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentShaderCode);
// Create program handle to vertex and frag shaders
mProgram = GLES20.glCreateProgram(); // create empty OpenGL ES Program
GLES20.glAttachShader(mProgram, vertexShader); // add the vertex shader to program
GLES20.glAttachShader(mProgram, fragmentShader); // add the fragment shader to program
GLES20.glLinkProgram(mProgram); // creates OpenGL ES program executables
GLES20.glBindAttribLocation(mProgram, 0, "vPosition");
GLES20.glBindAttribLocation(mProgram, 1, "a_TexCoordinate");
// Creating and loaded the vertex buffer and texture buffer
initBuffers();
// Load the texture
// gl.glEnable(GL10.GL_TEXTURE_2D);
AssetManager am = mcontext.getAssets();
try {
InputStream is = am.open("jalal_strawberry_2444x2444.png");
Bitmap bitmap = BitmapFactory.decodeStream(is);
// Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(),R.drawable.android);
// ByteBuffer imageBuffer = ByteBuffer.allocateDirect(bitmap.getByteCount()); //one float size
// is 4 bytes
// imageBuffer.order(ByteOrder.nativeOrder()); //byte order must be native
// bitmap.copyPixelsToBuffer(imageBuffer);
// generate one texture pointer
gl.glGenTextures(1, textures, 0);
// ...and bind it to our array
gl.glBindTexture(GL10.GL_TEXTURE_2D, textures[0]);
// create nearest filtered texture
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);
// Use Android GLUtils to specify a two-dimensional texture image from our bitmap
// GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bitmap, 0);
// (target, level, internalformat, width, height, border, format, type, pixels)
System.out.println("width is " + bitmap.getWidth() + " and height is " + bitmap.getHeight());
System.out.println("max texture size is " + GLES10.GL_MAX_TEXTURE_SIZE);
ByteArrayOutputStream os = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.WEBP, 1, os);
byte[] array = os.toByteArray();
// ByteBuffer imageBuffer = ByteBuffer.allocateDirect(array.length);
// imageBuffer.order(ByteOrder.nativeOrder());
// imageBuffer.put(array);
Bitmap compressedImage = BitmapFactory.decodeByteArray(array, 0, array.length);
// GL_PALETTE8_RGBA8_OES
// GLES10.glTexImage2D(GLES10.GL_TEXTURE_2D, 0, GLES10.GL_RGBA, bitmap.getWidth(),
// bitmap.getHeight(), 0, GLES10.GL_RGBA, GLES10.GL_UNSIGNED_BYTE, imageBuffer);
GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, compressedImage, 0);
// Clean up
bitmap.recycle();
if (textures[0] == 0) {
throw new RuntimeException("Error loading texture.");
}
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public boolean initObject() {
if (imageResId != 0) {
vertexCount = coordinates.length / COORDS_PER_VERTEX;
ByteBuffer buff = ByteBuffer.allocateDirect(coordinates.length * 4);
buff.order(ByteOrder.nativeOrder());
vBuffer = buff.asFloatBuffer();
vBuffer.put(coordinates);
vBuffer.position(0);
ByteBuffer drawBuff = ByteBuffer.allocateDirect(drawOrder.length * 2);
drawBuff.order(ByteOrder.nativeOrder());
drawBuffer = drawBuff.asShortBuffer();
drawBuffer.put(drawOrder);
drawBuffer.position(0);
ByteBuffer textBuff = ByteBuffer.allocateDirect(textureCoordinates.length * 4);
textBuff.order(ByteOrder.nativeOrder());
textureBuffer = textBuff.asFloatBuffer();
textureBuffer.put(textureCoordinates);
textureBuffer.position(0);
// Prepare shaders and OpenGL program
vertexShaderHandle = loadShader(GLES20.GL_VERTEX_SHADER, vertexShaderCode);
fragShaderHandle = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentShaderCode);
programHandle = GLES20.glCreateProgram(); // create empty OpenGL Program
GLES20.glAttachShader(programHandle, vertexShaderHandle); // add the vertex shader to program
GLES20.glAttachShader(programHandle, fragShaderHandle); // add the fragment shader to program
GLES20.glBindAttribLocation(programHandle, 0, "aPosition");
GLES20.glBindAttribLocation(programHandle, 1, "aTexCoordinate");
GLES20.glLinkProgram(programHandle); // create OpenGL program executables
final int[] status = new int[1];
GLES20.glGetProgramiv(programHandle, GLES20.GL_LINK_STATUS, status, 0);
if (status[0] == 0) {
Log.e(
"GLSprite",
"Error compiling OpenGL program: " + GLES20.glGetProgramInfoLog(programHandle));
GLES20.glDeleteProgram(programHandle);
programHandle = 0;
throw new RuntimeException("Error creating OpenGL program.");
}
textureDataHandle = GLUtil.loadTexture(mCanvas.getView().getContext(), imageResId);
// get handle to vertex shader's aPosition member
positionHandle = GLES20.glGetAttribLocation(programHandle, "aPosition");
textureCoordinateHandle = GLES20.glGetAttribLocation(programHandle, "aTexCoordinate");
mModelMatrixHandle = GLES20.glGetUniformLocation(programHandle, "uMVMatrix");
GLES20Renderer.checkGLError("glUniformLocation uMVMatrix");
mMVPMatrixHandle = GLES20.glGetUniformLocation(programHandle, "uMVPMatrix");
GLES20Renderer.checkGLError("glUniformLocation uMVPMatrix");
textureUniformHandle = GLES20.glGetUniformLocation(programHandle, "u_Texture");
GLES20Renderer.checkGLError("glUniformLocation u_Texture");
GLES20.glEnable(GLES20.GL_BLEND);
GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE_MINUS_SRC_ALPHA);
initialized = true;
return true;
} else {
return false;
}
}
@Override
public void onSurfaceCreated(GL10 glUnused, EGLConfig config) {
SurfaceCreated(glUnused, config);
// Set the background clear color to gray.
GLES20.glClearColor(0.5f, 0.5f, 0.5f, 0.5f);
// Position the eye behind the origin.
final float eyeX = 0.0f;
final float eyeY = 0.0f;
final float eyeZ = 1.5f;
// We are looking toward the distance
final float lookX = 0.0f;
final float lookY = 0.0f;
final float lookZ = -5.0f;
// Set our up vector. This is where our head would be pointing were we holding the camera.
final float upX = 0.0f;
final float upY = 1.0f;
final float upZ = 0.0f;
// Set the view matrix. This matrix can be said to represent the camera position.
// NOTE: In OpenGL 1, a ModelView matrix is used, which is a combination of a model and
// view matrix. In OpenGL 2, we can keep track of these matrices separately if we choose.
Matrix.setLookAtM(mViewMatrix, 0, eyeX, eyeY, eyeZ, lookX, lookY, lookZ, upX, upY, upZ);
final String vertexShader =
"uniform mat4 u_MVPMatrix; \n" // A constant representing the combined
// model/view/projection matrix.
+ "attribute vec4 a_Position; \n" // Per-vertex position information we will pass
// in.
+ "attribute vec4 a_Color; \n" // Per-vertex color information we will pass in.
+ "varying vec4 v_Color; \n" // This will be passed into the fragment shader.
+ "void main() \n" // The entry point for our vertex shader.
+ "{ \n"
+ " v_Color = a_Color; \n" // Pass the color through to the fragment shader.
// It will be interpolated across the triangle.
+ " gl_Position = u_MVPMatrix \n" // gl_Position is a special variable used to store
// the final position.
+ " * a_Position; \n" // Multiply the vertex by the matrix to get the
// final point in
+ "} \n"; // normalized screen coordinates.
final String fragmentShader =
"precision mediump float; \n" // Set the default precision to medium. We don't need as
// high of a
// precision in the fragment shader.
+ "varying vec4 v_Color; \n" // This is the color from the vertex shader
// interpolated across the
// triangle per fragment.
+ "void main() \n" // The entry point for our fragment shader.
+ "{ \n"
+ " gl_FragColor = v_Color; \n" // Pass the color directly through the pipeline.
+ "} \n";
// Load in the vertex shader.
int vertexShaderHandle = GLES20.glCreateShader(GLES20.GL_VERTEX_SHADER);
if (vertexShaderHandle != 0) {
// Pass in the shader source.
GLES20.glShaderSource(vertexShaderHandle, vertexShader);
// Compile the shader.
GLES20.glCompileShader(vertexShaderHandle);
// Get the compilation status.
final int[] compileStatus = new int[1];
GLES20.glGetShaderiv(vertexShaderHandle, GLES20.GL_COMPILE_STATUS, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0) {
GLES20.glDeleteShader(vertexShaderHandle);
vertexShaderHandle = 0;
}
}
if (vertexShaderHandle == 0) {
throw new RuntimeException("Error creating vertex shader.");
}
// Load in the fragment shader shader.
int fragmentShaderHandle = GLES20.glCreateShader(GLES20.GL_FRAGMENT_SHADER);
if (fragmentShaderHandle != 0) {
// Pass in the shader source.
GLES20.glShaderSource(fragmentShaderHandle, fragmentShader);
// Compile the shader.
GLES20.glCompileShader(fragmentShaderHandle);
// Get the compilation status.
final int[] compileStatus = new int[1];
GLES20.glGetShaderiv(fragmentShaderHandle, GLES20.GL_COMPILE_STATUS, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0) {
GLES20.glDeleteShader(fragmentShaderHandle);
fragmentShaderHandle = 0;
}
}
if (fragmentShaderHandle == 0) {
throw new RuntimeException("Error creating fragment shader.");
}
// Create a program object and store the handle to it.
int programHandle = GLES20.glCreateProgram();
if (programHandle != 0) {
// Bind the vertex shader to the program.
GLES20.glAttachShader(programHandle, vertexShaderHandle);
// Bind the fragment shader to the program.
GLES20.glAttachShader(programHandle, fragmentShaderHandle);
// Bind attributes
GLES20.glBindAttribLocation(programHandle, 0, "a_Position");
GLES20.glBindAttribLocation(programHandle, 1, "a_Color");
// Link the two shaders together into a program.
GLES20.glLinkProgram(programHandle);
// Get the link status.
final int[] linkStatus = new int[1];
GLES20.glGetProgramiv(programHandle, GLES20.GL_LINK_STATUS, linkStatus, 0);
// If the link failed, delete the program.
if (linkStatus[0] == 0) {
GLES20.glDeleteProgram(programHandle);
programHandle = 0;
}
}
if (programHandle == 0) {
throw new RuntimeException("Error creating program.");
}
// Set program handles. These will later be used to pass in values to the program.
mMVPMatrixHandle = GLES20.glGetUniformLocation(programHandle, "u_MVPMatrix");
mPositionHandle = GLES20.glGetAttribLocation(programHandle, "a_Position");
mColorHandle = GLES20.glGetAttribLocation(programHandle, "a_Color");
// Tell OpenGL to use this program when rendering.
GLES20.glUseProgram(programHandle);
}
/** Method for creating the most basic of shaders. */
private void createShaders() {
final String vertexShader =
"uniform mat4 u_MVPMatrix; \n"
+ "attribute vec4 a_Position; \n"
+ "attribute vec4 a_Color; \n"
+ "varying vec4 v_Color; \n"
+ "void main() \n"
+ "{ \n"
+ " v_Color = a_Color; \n"
+ " gl_Position = u_MVPMatrix \n"
+ " * a_Position; \n"
+ "} \n";
final String fragmentShader =
"precision mediump float; \n"
+ "varying vec4 v_Color; \n"
+ "void main() \n"
+ "{ \n"
+ " gl_FragColor = v_Color; \n"
+ "} \n";
// Load in the vertex shader.
int vertexShaderHandle = GLES20.glCreateShader(GLES20.GL_VERTEX_SHADER);
if (vertexShaderHandle != 0) {
// Pass in the shader source.
GLES20.glShaderSource(vertexShaderHandle, vertexShader);
// Compile the shader.
GLES20.glCompileShader(vertexShaderHandle);
// Get the compilation status.
final int[] compileStatus = new int[1];
GLES20.glGetShaderiv(vertexShaderHandle, GLES20.GL_COMPILE_STATUS, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0) {
GLES20.glDeleteShader(vertexShaderHandle);
vertexShaderHandle = 0;
}
}
if (vertexShaderHandle == 0) {
throw new RuntimeException("Error creating vertex shader.");
}
// Load in the fragment shader shader.
int fragmentShaderHandle = GLES20.glCreateShader(GLES20.GL_FRAGMENT_SHADER);
if (fragmentShaderHandle != 0) {
// Pass in the shader source.
GLES20.glShaderSource(fragmentShaderHandle, fragmentShader);
// Compile the shader.
GLES20.glCompileShader(fragmentShaderHandle);
// Get the compilation status.
final int[] compileStatus = new int[1];
GLES20.glGetShaderiv(fragmentShaderHandle, GLES20.GL_COMPILE_STATUS, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0) {
GLES20.glDeleteShader(fragmentShaderHandle);
fragmentShaderHandle = 0;
}
}
if (fragmentShaderHandle == 0) {
throw new RuntimeException("Error creating fragment shader.");
}
// Create a program object and store the handle to it.
int programHandle = GLES20.glCreateProgram();
if (programHandle != 0) {
// Bind the vertex shader to the program.
GLES20.glAttachShader(programHandle, vertexShaderHandle);
// Bind the fragment shader to the program.
GLES20.glAttachShader(programHandle, fragmentShaderHandle);
// Bind attributes
GLES20.glBindAttribLocation(programHandle, 0, "a_Position");
GLES20.glBindAttribLocation(programHandle, 1, "a_Color");
// Link the two shaders together into a program.
GLES20.glLinkProgram(programHandle);
// Get the link status.
final int[] linkStatus = new int[1];
GLES20.glGetProgramiv(programHandle, GLES20.GL_LINK_STATUS, linkStatus, 0);
// If the link failed, delete the program.
if (linkStatus[0] == 0) {
GLES20.glDeleteProgram(programHandle);
programHandle = 0;
}
}
if (programHandle == 0) {
throw new RuntimeException("Error creating program.");
}
// Set program handles. These will later be used to pass in values to the program.
mMVPMatrixHandle = GLES20.glGetUniformLocation(programHandle, "u_MVPMatrix");
mPositionHandle = GLES20.glGetAttribLocation(programHandle, "a_Position");
mColorHandle = GLES20.glGetAttribLocation(programHandle, "a_Color");
// Tell OpenGL to use this program when rendering.
GLES20.glUseProgram(programHandle);
}
@Override
public void onSurfaceCreated(GL10 glUnused, EGLConfig config) {
GLES20.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
// Use culling to remove back faces.
// GLES20.glEnable(GLES20.GL_CULL_FACE);
GLES20.glEnable(GLES20.GL_DEPTH_TEST);
// // Position the eye behind the origin.
// Position the eye behind the origin.
final float eyeX = 0.0f;
final float eyeY = 0.0f;
final float eyeZ = 2f; // 1.5f;
// We are looking toward the distance
final float lookX = 0.0f;
final float lookY = 0.0f;
final float lookZ = -5.0f;
// Set our up vector. This is where our head would be pointing were we holding the camera.
final float upX = 0.0f;
final float upY = 1.0f;
final float upZ = 0.0f;
// Set the view matrix. This matrix can be said to represent the camera position.
// NOTE: In OpenGL 1, a ModelView matrix is used, which is a combination of a model and
// view matrix. In OpenGL 2, we can keep track of these matrices separately if we choose.
Matrix.setLookAtM(mViewMatrix, 0, eyeX, eyeY, eyeZ, lookX, lookY, lookZ, upX, upY, upZ);
// please note i am making view matrix as identity matrix intentionally here to avoid the
// effects of view matrix. if you want explore the effect of view matrix you can uncomment this
// line
// Matrix.setIdentityM(mViewMatrix, 0);
final String vertexShader =
"uniform mat4 u_MVPMatrix; \n" // A constant representing the combined
// model/view/projection matrix.
+ "attribute vec4 a_Position; \n" // Per-vertex position information we will pass
// in.
+ "attribute vec4 a_Color; \n" // Per-vertex color information we will pass in.
+ "attribute vec2 a_TexCoordinate;\n"
+ "varying vec2 v_TexCoordinate; \n"
+ "varying vec4 v_Color; \n" // This will be passed into the fragment shader.
+ "void main() \n" // The entry point for our vertex shader.
+ "{ \n"
+ " v_Color = a_Color; \n" // Pass the color through to the fragment shader.
+ "v_TexCoordinate = a_TexCoordinate;\n" // It will be interpolated across the triangle.
+ " gl_Position = u_MVPMatrix \n" // gl_Position is a special variable used to store
// the final position.
+ " * a_Position; \n" // Multiply the vertex by the matrix to get the
// final point in
+ "} \n"; // normalized screen coordinates.
final String fragmentShader =
"precision mediump float; \n" // Set the default precision to medium. We don't need as
// high of a
// precision in the fragment shader.
+ "varying vec4 v_Color; \n" // This is the color from the vertex shader
// interpolated across the
+ "uniform sampler2D u_Texture; \n"
+ "varying vec2 v_TexCoordinate; \n" // triangle per fragment.
+ "void main() \n" // The entry point for our fragment shader.
+ "{ \n"
+ " gl_FragColor = (v_Color * texture2D(u_Texture, v_TexCoordinate)); \n" // Pass
// the
// color
// directly through the pipeline.
+ "} \n";
// Load in the vertex shader.
int vertexShaderHandle = GLES20.glCreateShader(GLES20.GL_VERTEX_SHADER);
if (vertexShaderHandle != 0) {
// Pass in the shader source.
GLES20.glShaderSource(vertexShaderHandle, vertexShader);
// Compile the shader.
GLES20.glCompileShader(vertexShaderHandle);
// Get the compilation status.
final int[] compileStatus = new int[1];
GLES20.glGetShaderiv(vertexShaderHandle, GLES20.GL_COMPILE_STATUS, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0) {
GLES20.glDeleteShader(vertexShaderHandle);
vertexShaderHandle = 0;
}
}
if (vertexShaderHandle == 0) {
throw new RuntimeException("Error creating vertex shader.");
}
// Load in the fragment shader shader.
int fragmentShaderHandle = GLES20.glCreateShader(GLES20.GL_FRAGMENT_SHADER);
if (fragmentShaderHandle != 0) {
// Pass in the shader source.
GLES20.glShaderSource(fragmentShaderHandle, fragmentShader);
// Compile the shader.
GLES20.glCompileShader(fragmentShaderHandle);
// Get the compilation status.
final int[] compileStatus = new int[1];
GLES20.glGetShaderiv(fragmentShaderHandle, GLES20.GL_COMPILE_STATUS, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0) {
GLES20.glDeleteShader(fragmentShaderHandle);
fragmentShaderHandle = 0;
}
}
if (fragmentShaderHandle == 0) {
throw new RuntimeException("Error creating fragment shader.");
}
// Create a program object and store the handle to it.
mProgramHandle = GLES20.glCreateProgram();
if (mProgramHandle != 0) {
// Bind the vertex shader to the program.
GLES20.glAttachShader(mProgramHandle, vertexShaderHandle);
// Bind the fragment shader to the program.
GLES20.glAttachShader(mProgramHandle, fragmentShaderHandle);
// Bind attributes
GLES20.glBindAttribLocation(mProgramHandle, 0, "a_Position");
GLES20.glBindAttribLocation(mProgramHandle, 1, "a_Color");
GLES20.glBindAttribLocation(mProgramHandle, 2, "a_TexCoordinate");
// Link the two shaders together into a program.
GLES20.glLinkProgram(mProgramHandle);
mTextureDataHandle0 = loadTexture(mActivityContext, R.drawable.nature1);
mTextureDataHandle1 = loadTexture(mActivityContext, R.drawable.nature2);
mTextureDataHandle2 = loadTexture(mActivityContext, R.drawable.nature3);
mTextureDataHandle3 = loadTexture(mActivityContext, R.drawable.nature4);
mTextureDataHandle4 = loadTexture(mActivityContext, R.drawable.nature5);
mTextureDataHandle5 = loadTexture(mActivityContext, R.drawable.nature6);
// Get the link status.
final int[] linkStatus = new int[1];
GLES20.glGetProgramiv(mProgramHandle, GLES20.GL_LINK_STATUS, linkStatus, 0);
// If the link failed, delete the program.
if (linkStatus[0] == 0) {
GLES20.glDeleteProgram(mProgramHandle);
mProgramHandle = 0;
}
}
if (mProgramHandle == 0) {
throw new RuntimeException("Error creating program.");
}
}