glCompileShader example c c++ java objc

Name
      glCompileShader — compile a shader object

C Specification

       void glCompileShader(GLuint shader);

Parameters

    shader       Specifies the shader object to be compiled.

Description

    For implementations that support a shader compiler, glCompileShader compiles
    the source code strings that have been stored in the shader object
    specified by shader.The compilation status will be stored as part of the
    shader object's state. This value will be set to GL_TRUE if the shader was
    compiled without errors and is ready for use, and GL_FALSE otherwise.
    It can be queried by calling glGetShaderiv with arguments shader and
    GL_COMPILE_STATUS.Compilation of a shader can fail for a number of reasons
    as specified by the OpenGL ES Shading Language Specification.
    Whether or not the compilation was successful, information about
    the compilation can be obtained from the shader object's
    information log by calling glGetShaderInfoLog.

Notes
    Shader compiler support is optional, and thus must be queried
    before use by calling glGet with argument GL_SHADER_COMPILER.
    glShaderSource, glCompileShader, glGetShaderPrecisionFormat, and
    glReleaseShaderCompiler will each generate GL_INVALID_OPERATION on
    implementations that do not support a shader compiler.
    Such implementations instead offer the glShaderBinary
    alternative for supplying a pre-compiled shader binary.

Errors
    GL_INVALID_OPERATION is generated if a shader compiler is not
    supported.
    GL_INVALID_VALUE is generated if shader is not a value generated by
    OpenGL.
    GL_INVALID_OPERATION is generated if shader is not a shader object.

Associated Gets
    glGet with argument GL_SHADER_COMPILER
    glGetShaderInfoLog with argument shader
    glGetShaderiv with arguments shader and GL_COMPILE_STATUS
    glIsShader

See Also
    glCreateShader,
    glLinkProgram,
    glReleaseShaderCompiler,
    glShaderSource,
    glGetShaderPrecisionFormat

Copyright
            Copyright © 2003-2005 3Dlabs Inc. Ltd.
            This material may be distributed subject to the terms and conditions set forth in
            the Open Publication License, v 1.0, 8 June 1999.
            http://opencontent.org/openpub/.        

Examples

/* The vertex shader */
 char *vsSource = file2string("wave.vert");
 char *fsSource = file2string("wave.frag");
 
 /* Compile and load the program */
 
 GLuint vs, /* Vertex Shader */
     fs, /* Fragment Shader */
     sp; /* Shader Program */
 
 
 vs = glCreateShader(GL_VERTEX_SHADER);
 glShaderSource(vs, 1, &vsSource, NULL);
 glCompileShader(vs);
 printLog(vs);
 
 fs = glCreateShader(GL_FRAGMENT_SHADER);
 glShaderSource(fs, 1, &fsSource, NULL);
 glCompileShader(fs);
 printLog(fs);
 
 free(vsSource);
 free(fsSource);
 
 sp = glCreateProgram();
 glAttachShader(sp, vs);
 glAttachShader(sp, fs);
 glLinkProgram(sp);
 printLog(sp);
 
 glUseProgram(sp);