Function CreateGLRenderbuffer

test_common/gl/helpers.cpp:1568–1760

#endif // GL_VERSION_3_2

void * CreateGLRenderbuffer( GLsizei width, GLsizei height,
                             GLenum attachment, GLenum glFormat,
                             GLenum internalFormat, GLenum glType,
                             ExplicitType type,
                             GLuint *outFramebuffer,
                             GLuint *outRenderbuffer,
                             int *outError, MTdata d, bool allocateMem )
{
    *outError = CreateGLRenderbufferRaw( width, height, attachment, glFormat, internalFormat,
                            glType, outFramebuffer, outRenderbuffer );

    if( *outError != 0 )
        return NULL;

    GLenum err = 0;

    // Generate a renderbuffer and bind
    glGenRenderbuffersEXT( 1, outRenderbuffer );
    glBindRenderbufferEXT( GL_RENDERBUFFER_EXT, *outRenderbuffer );

    // Allocate storage to the renderbuffer
    glGetError();
    glRenderbufferStorageEXT( GL_RENDERBUFFER_EXT, internalFormat, (GLsizei)width,  (GLsizei)height );
    err = glGetError();
    if( err != GL_NO_ERROR )
    {
        *outError = 1701;
        log_error("Failed to allocate render buffer storage!\n");
        return NULL;
    }

    GLint realInternalFormat;
    glGetRenderbufferParameterivEXT( GL_RENDERBUFFER_EXT, GL_RENDERBUFFER_INTERNAL_FORMAT_EXT, &realInternalFormat );
    internalFormat = realInternalFormat;

#ifdef DEBUG
    GLint rsize, gsize, bsize, asize;
    glGetRenderbufferParameterivEXT(GL_RENDERBUFFER_EXT, GL_RENDERBUFFER_RED_SIZE_EXT,&rsize);
    glGetRenderbufferParameterivEXT(GL_RENDERBUFFER_EXT, GL_RENDERBUFFER_GREEN_SIZE_EXT,&gsize);
    glGetRenderbufferParameterivEXT(GL_RENDERBUFFER_EXT, GL_RENDERBUFFER_BLUE_SIZE_EXT,&bsize);
    glGetRenderbufferParameterivEXT(GL_RENDERBUFFER_EXT, GL_RENDERBUFFER_ALPHA_SIZE_EXT,&asize);

    log_info("Renderbuffer internal format requested: %s actual: %s sizes: r=%d g=%d b=%d a=%d\n",
              GetGLFormatName( internalFormat ), GetGLFormatName( realInternalFormat ),
              rsize, gsize, bsize, asize );
#endif

    // Create and bind a framebuffer to render with
    glGenFramebuffersEXT( 1, outFramebuffer );
    glBindFramebufferEXT( GL_FRAMEBUFFER_EXT, *outFramebuffer );
    if( err != GL_NO_ERROR )
    {
        log_error( "ERROR: Unable to bind framebuffer : Error %s\n",
                  gluErrorString( err ));

        *outError = -1;
        return NULL;
    }