Esempio n. 1
0
  // Creates program object, attaches shaders, and links into pipeline
  protected int createProgram(String vertexSource, String fragmentSource) {
    // Load the vertex and fragment shaders
    int vertexShader = loadShader(GL_VERTEX_SHADER, vertexSource);
    int fragmentShader = loadShader(GL_FRAGMENT_SHADER, fragmentSource);
    // Create the program object
    int program = glCreateProgram();
    if (vertexShader == 0 || fragmentShader == 0 || program == 0) return 0;

    if (program != 0) {
      glAttachShader(program, vertexShader);
      ctx.checkGLError("createProgram Attaching vertex shader");
      glAttachShader(program, fragmentShader);
      ctx.checkGLError("createProgram Attaching fragment shader");
      glLinkProgram(program);

      int linkStatus = glGetProgram(program, GL_LINK_STATUS);
      if (linkStatus != GL_TRUE) {
        log().error("Could not link program: ");
        log().error(glGetProgramInfoLog(program, SHADER_INFO_LOG_LEN));
        glDeleteProgram(program);
        program = 0;
      }
    }
    return program;
  }
Esempio n. 2
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  protected boolean prepare(int fbufWidth, int fbufHeight) {
    if (ctx.useShader(this) && glIsProgram(program)) {
      glUseProgram(program);
      ctx.checkGLError("Shader.prepare useProgram");

      glUniform2f(uScreenSizeLoc, fbufWidth, fbufHeight);
      // ctx.checkGLError("Shader.prepare uScreenSizeLoc set to " + fbufWidth + " " + fbufHeight);

      glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, elementBuffer);
      ctx.checkGLError("Shader.prepare BindBuffer");

      glEnableVertexAttribArray(aMatrix);
      glEnableVertexAttribArray(aTranslation);
      glEnableVertexAttribArray(aPosition);
      if (aTexture != -1) glEnableVertexAttribArray(aTexture);
      ctx.checkGLError("Shader.prepare AttribArrays enabled");

      glVertexAttribPointer(aMatrix, 4, GL_FLOAT, false, VERTEX_STRIDE, 0);
      glVertexAttribPointer(aTranslation, 2, GL_FLOAT, false, VERTEX_STRIDE, 16);
      glVertexAttribPointer(aPosition, 2, GL_FLOAT, false, VERTEX_STRIDE, 24);
      if (aTexture != -1) glVertexAttribPointer(aTexture, 2, GL_FLOAT, false, VERTEX_STRIDE, 32);
      ctx.checkGLError("Shader.prepare AttribPointer");
      return true;
    }
    return false;
  }
Esempio n. 3
0
  @Override
  public void flush() {
    if (vertexOffset == 0) {
      return;
    }
    ctx.checkGLError("Shader.flush");

    vertexData.position(0);
    glBufferData(GL_ARRAY_BUFFER, vertexData, GL_STREAM_DRAW);
    glBufferData(GL_ELEMENT_ARRAY_BUFFER, elementData, GL_STREAM_DRAW);
    ctx.checkGLError("Shader.flush BufferData");

    glDrawElements(GL_TRIANGLES, elementOffset, GL_UNSIGNED_SHORT, 0);
    vertexOffset = elementOffset = 0;
    ctx.checkGLError("Shader.flush DrawElements");
  }