Class CFrameBufferObject

Common/rendercheck_gl.h:729–1112

};

class CFrameBufferObject {
 public:
  CFrameBufferObject(unsigned int width, unsigned int height, unsigned int Bpp,
                     bool bUseFloat, GLenum eTarget)
      : m_Width(width),
        m_Height(height),
        m_bUseFloat(bUseFloat),
        m_eGLTarget(eTarget) {
    glGenFramebuffersEXT(1, &m_fboData.fb);

    m_fboData.colorTex =
        createTexture(m_eGLTarget, width, height,
                      (bUseFloat ? GL_RGBA32F_ARB : GL_RGBA8), GL_RGBA);

    m_fboData.depthTex = createTexture(
        m_eGLTarget, width, height, GL_DEPTH_COMPONENT24, GL_DEPTH_COMPONENT);

    attachTexture(m_eGLTarget, m_fboData.colorTex, GL_COLOR_ATTACHMENT0_EXT);
    attachTexture(m_eGLTarget, m_fboData.depthTex, GL_DEPTH_ATTACHMENT_EXT);

    //    bool ret = checkStatus(__FILE__, __LINE__, true);
  }

  virtual ~CFrameBufferObject() {
    //   freeResources();
  }

  GLuint createTexture(GLenum target, int w, int h, GLint internalformat,
                       GLenum format) {
    GLuint texid;
    glGenTextures(1, &texid);
    glBindTexture(target, texid);

    glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

    glTexImage2D(target, 0, internalformat, w, h, 0, format, GL_FLOAT, 0);
    return texid;
  }

  void attachTexture(GLenum texTarget, GLuint texId,
                     GLenum attachment = GL_COLOR_ATTACHMENT0_EXT,
                     int mipLevel = 0, int zSlice = 0) {
    bindRenderPath();

    switch (texTarget) {
      case GL_TEXTURE_1D:
        glFramebufferTexture1DEXT(GL_FRAMEBUFFER_EXT, attachment, GL_TEXTURE_1D,
                                  texId, mipLevel);
        break;

      case GL_TEXTURE_3D:
        glFramebufferTexture3DEXT(GL_FRAMEBUFFER_EXT, attachment, GL_TEXTURE_3D,
                                  texId, mipLevel, zSlice);
        break;