Method FillWithDiscardPattern

renderdoc/driver/gl/gl_debug.cpp:1579–1715

}

void GLReplay::FillWithDiscardPattern(DiscardType type, GLuint framebuffer, GLsizei numAttachments,
                                      const GLenum *attachments, GLint x, GLint y, GLsizei width,
                                      GLsizei height)
{
  RDCASSERT(type == DiscardType::InvalidateCall);

  WrappedOpenGL &drv = *m_pDriver;

  GLMarkerRegion region("FillWithDiscardPattern FBO");

  GLRenderState rs;
  rs.FetchState(&drv);

  // we use the original framebuffer, and mask off any attachments that shouldn't be discarded
  drv.glBindFramebuffer(eGL_DRAW_FRAMEBUFFER, framebuffer);

  int numviews = 1;

  if(IsGLES && HasExt[OVR_multiview])
  {
    GL.glGetNamedFramebufferAttachmentParameterivEXT(
        framebuffer, eGL_COLOR_ATTACHMENT0, eGL_FRAMEBUFFER_ATTACHMENT_TEXTURE_NUM_VIEWS_OVR,
        &numviews);
  }

  drv.glBindBufferBase(eGL_UNIFORM_BUFFER, 0, DebugData.discardPatternBuffer);

  drv.glDisable(eGL_BLEND);
  drv.glDisable(eGL_CULL_FACE);
  drv.glEnable(eGL_DEPTH_TEST);
  drv.glEnable(eGL_STENCIL_TEST);
  drv.glDepthFunc(eGL_ALWAYS);
  drv.glStencilFunc(eGL_ALWAYS, 0, 0xff);
  if(!IsGLES)
    drv.glPolygonMode(eGL_FRONT_AND_BACK, eGL_FILL);

  // scissor to the rect
  drv.glEnable(eGL_SCISSOR_TEST);
  drv.glScissor(x, y, width, height);

  GLint maxview[2] = {2048, 2048};
  drv.glGetIntegerv(eGL_MAX_VIEWPORT_DIMS, maxview);
  drv.glViewport(0, 0, maxview[0], maxview[1]);

  // disable all masks at first
  drv.glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
  drv.glDepthMask(GL_FALSE);
  drv.glStencilMask(0);

  int intIdx = -1;

  // enable masks specified by attachments
  bool stencil = false;
  for(GLsizei i = 0; i < numAttachments; i++)
  {
    if(attachments[i] == eGL_DEPTH_STENCIL_ATTACHMENT)
    {
      drv.glDepthMask(GL_TRUE);