C++ CPDF_PageObject::IsForm方法代码示例

DLLEXPORT FPDF_BOOL STDCALL
FPDFPageObj_HasTransparency(FPDF_PAGEOBJECT pageObject) {
  if (!pageObject)
    return FALSE;

  CPDF_PageObject* pPageObj = reinterpret_cast<CPDF_PageObject*>(pageObject);
  int blend_type = pPageObj->m_GeneralState.GetBlendType();
  if (blend_type != FXDIB_BLEND_NORMAL)
    return TRUE;

  CPDF_Dictionary* pSMaskDict =
      ToDictionary(pPageObj->m_GeneralState.GetSoftMask());
  if (pSMaskDict)
    return TRUE;

  if (pPageObj->m_GeneralState.GetFillAlpha() != 1.0f)
    return TRUE;

  if (pPageObj->IsPath() && pPageObj->m_GeneralState.GetStrokeAlpha() != 1.0f) {
    return TRUE;
  }

  if (pPageObj->IsForm()) {
    const CPDF_Form* pForm = pPageObj->AsForm()->form();
    if (pForm) {
      int trans = pForm->m_Transparency;
      if ((trans & PDFTRANS_ISOLATED) || (trans & PDFTRANS_GROUP))
        return TRUE;
    }
  }

  return FALSE;
}

void CPDF_TextPage::ProcessFormObject(CPDF_FormObject* pFormObj,
                                      const CFX_Matrix& formMatrix) {
  const CPDF_PageObjectList* pObjectList =
      pFormObj->form()->GetPageObjectList();
  if (pObjectList->empty())
    return;

  CFX_Matrix curFormMatrix = pFormObj->form_matrix() * formMatrix;

  for (auto it = pObjectList->begin(); it != pObjectList->end(); ++it) {
    CPDF_PageObject* pPageObj = it->get();
    if (!pPageObj)
      continue;

    if (pPageObj->IsText())
      ProcessTextObject(pPageObj->AsText(), curFormMatrix, pObjectList, it);
    else if (pPageObj->IsForm())
      ProcessFormObject(pPageObj->AsForm(), curFormMatrix);
  }
}

void CPDF_TextPage::ProcessObject() {
  if (m_pPage->GetPageObjectList()->empty())
    return;

  m_TextlineDir = FindTextlineFlowOrientation();
  const CPDF_PageObjectList* pObjList = m_pPage->GetPageObjectList();
  for (auto it = pObjList->begin(); it != pObjList->end(); ++it) {
    CPDF_PageObject* pObj = it->get();
    if (!pObj)
      continue;

    CFX_Matrix matrix;
    if (pObj->IsText())
      ProcessTextObject(pObj->AsText(), matrix, pObjList, it);
    else if (pObj->IsForm())
      ProcessFormObject(pObj->AsForm(), matrix);
  }
  for (const auto& obj : m_LineObj)
    ProcessTextObject(obj);

  m_LineObj.clear();
  CloseTempLine();
}

void CPDF_ProgressiveRenderer::Continue(IFX_Pause* pPause) {
  while (m_Status == ToBeContinued) {
    if (!m_pCurrentLayer) {
      if (m_LayerIndex >= m_pContext->CountLayers()) {
        m_Status = Done;
        return;
      }
      m_pCurrentLayer = m_pContext->GetLayer(m_LayerIndex);
      m_LastObjectRendered =
          m_pCurrentLayer->m_pObjectHolder->GetPageObjectList()->end();
      m_pRenderStatus.reset(new CPDF_RenderStatus());
      m_pRenderStatus->Initialize(
          m_pContext, m_pDevice, nullptr, nullptr, nullptr, nullptr, m_pOptions,
          m_pCurrentLayer->m_pObjectHolder->m_Transparency, FALSE, nullptr);
      m_pDevice->SaveState();
      m_ClipRect = CFX_FloatRect(m_pDevice->GetClipBox());
      CFX_Matrix device2object;
      device2object.SetReverse(m_pCurrentLayer->m_Matrix);
      device2object.TransformRect(m_ClipRect);
    }
    CPDF_PageObjectList::iterator iter;
    CPDF_PageObjectList::iterator iterEnd =
        m_pCurrentLayer->m_pObjectHolder->GetPageObjectList()->end();
    if (m_LastObjectRendered != iterEnd) {
      iter = m_LastObjectRendered;
      ++iter;
    } else {
      iter = m_pCurrentLayer->m_pObjectHolder->GetPageObjectList()->begin();
    }
    int nObjsToGo = kStepLimit;
    while (iter != iterEnd) {
      CPDF_PageObject* pCurObj = iter->get();
      if (pCurObj && pCurObj->m_Left <= m_ClipRect.right &&
          pCurObj->m_Right >= m_ClipRect.left &&
          pCurObj->m_Bottom <= m_ClipRect.top &&
          pCurObj->m_Top >= m_ClipRect.bottom) {
        if (m_pRenderStatus->ContinueSingleObject(
                pCurObj, &m_pCurrentLayer->m_Matrix, pPause)) {
          return;
        }
        if (pCurObj->IsImage() &&
            m_pRenderStatus->m_Options.m_Flags & RENDER_LIMITEDIMAGECACHE) {
          m_pContext->GetPageCache()->CacheOptimization(
              m_pRenderStatus->m_Options.m_dwLimitCacheSize);
        }
        if (pCurObj->IsForm() || pCurObj->IsShading()) {
          nObjsToGo = 0;
        } else {
          --nObjsToGo;
        }
      }
      m_LastObjectRendered = iter;
      if (nObjsToGo == 0) {
        if (pPause && pPause->NeedToPauseNow())
          return;
        nObjsToGo = kStepLimit;
      }
      ++iter;
    }
    if (m_pCurrentLayer->m_pObjectHolder->IsParsed()) {
      m_pRenderStatus.reset();
      m_pDevice->RestoreState(false);
      m_pCurrentLayer = nullptr;
      m_LayerIndex++;
      if (pPause && pPause->NeedToPauseNow()) {
        return;
      }
    } else {
      m_pCurrentLayer->m_pObjectHolder->ContinueParse(pPause);
      if (!m_pCurrentLayer->m_pObjectHolder->IsParsed())
        return;
    }
  }
}