当前位置: 首页>>代码示例>>C++>>正文

C++ CFX_DIBitmap::MultiplyAlpha方法代码示例

本文整理汇总了C++中CFX_DIBitmap::MultiplyAlpha方法的典型用法代码示例。如果您正苦于以下问题：C++ CFX_DIBitmap::MultiplyAlpha方法的具体用法？C++ CFX_DIBitmap::MultiplyAlpha怎么用？C++ CFX_DIBitmap::MultiplyAlpha使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类CFX_DIBitmap的用法示例。


在下文中一共展示了CFX_DIBitmap::MultiplyAlpha方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: Continue

FX_BOOL CPDF_ImageRenderer::Continue(IFX_Pause* pPause) {
    if (m_Status == 1) {
        if (m_pQuickStretcher->Continue(pPause)) {
            return TRUE;
        }
        if (m_pQuickStretcher->m_pBitmap->IsAlphaMask())
            m_pRenderStatus->m_pDevice->SetBitMask(
                m_pQuickStretcher->m_pBitmap, m_pQuickStretcher->m_ResultLeft,
                m_pQuickStretcher->m_ResultTop, m_FillArgb);
        else
            m_pRenderStatus->m_pDevice->SetDIBits(
                m_pQuickStretcher->m_pBitmap, m_pQuickStretcher->m_ResultLeft,
                m_pQuickStretcher->m_ResultTop, m_BlendType);
        return FALSE;
    }
    if (m_Status == 2) {
        if (m_pTransformer->Continue(pPause)) {
            return TRUE;
        }
        CFX_DIBitmap* pBitmap = m_pTransformer->m_Storer.Detach();
        if (pBitmap == NULL) {
            return FALSE;
        }
        if (pBitmap->IsAlphaMask()) {
            if (m_BitmapAlpha != 255) {
                m_FillArgb = FXARGB_MUL_ALPHA(m_FillArgb, m_BitmapAlpha);
            }
            m_Result = m_pRenderStatus->m_pDevice->SetBitMask(
                           pBitmap, m_pTransformer->m_ResultLeft, m_pTransformer->m_ResultTop,
                           m_FillArgb);
        } else {
            if (m_BitmapAlpha != 255) {
                pBitmap->MultiplyAlpha(m_BitmapAlpha);
            }
            m_Result = m_pRenderStatus->m_pDevice->SetDIBits(
                           pBitmap, m_pTransformer->m_ResultLeft, m_pTransformer->m_ResultTop,
                           m_BlendType);
        }
        delete pBitmap;
        return FALSE;
    }
    if (m_Status == 3) {
        return m_pRenderStatus->m_pDevice->ContinueDIBits(m_DeviceHandle, pPause);
    }
    if (m_Status == 4) {
        if (m_Loader.Continue(m_LoadHandle, pPause)) {
            return TRUE;
        }
        if (StartRenderDIBSource()) {
            return Continue(pPause);
        }
    }
    return FALSE;
}
开发者ID:，项目名称:，代码行数:54，代码来源:

示例2: ProcessTransparency


//.........这里部分代码省略.........
  if (m_bPrint) {
    FX_BOOL bRet = FALSE;
    int rendCaps = m_pDevice->GetRenderCaps();
    if (!((Transparency & PDFTRANS_ISOLATED) || pSMaskDict || bTextClip) &&
        (rendCaps & FXRC_BLEND_MODE)) {
      int oldBlend = m_curBlend;
      m_curBlend = blend_type;
      bRet = DrawObjWithBlend(pPageObj, pObj2Device);
      m_curBlend = oldBlend;
    }
    if (!bRet) {
      DrawObjWithBackground(pPageObj, pObj2Device);
    }
    return TRUE;
  }
  FX_RECT rect = pPageObj->GetBBox(pObj2Device);
  rect.Intersect(m_pDevice->GetClipBox());
  if (rect.IsEmpty()) {
    return TRUE;
  }
  CFX_Matrix deviceCTM = m_pDevice->GetCTM();
  FX_FLOAT scaleX = FXSYS_fabs(deviceCTM.a);
  FX_FLOAT scaleY = FXSYS_fabs(deviceCTM.d);
  int width = FXSYS_round((FX_FLOAT)rect.Width() * scaleX);
  int height = FXSYS_round((FX_FLOAT)rect.Height() * scaleY);
  CFX_FxgeDevice bitmap_device;
  std::unique_ptr<CFX_DIBitmap> oriDevice;
  if (!isolated && (m_pDevice->GetRenderCaps() & FXRC_GET_BITS)) {
    oriDevice.reset(new CFX_DIBitmap);
    if (!m_pDevice->CreateCompatibleBitmap(oriDevice.get(), width, height))
      return TRUE;
    m_pDevice->GetDIBits(oriDevice.get(), rect.left, rect.top);
  }
  if (!bitmap_device.Create(width, height, FXDIB_Argb, oriDevice.get()))
    return TRUE;
  CFX_DIBitmap* bitmap = bitmap_device.GetBitmap();
  bitmap->Clear(0);
  CFX_Matrix new_matrix = *pObj2Device;
  new_matrix.TranslateI(-rect.left, -rect.top);
  new_matrix.Scale(scaleX, scaleY);
  std::unique_ptr<CFX_DIBitmap> pTextMask;
  if (bTextClip) {
    pTextMask.reset(new CFX_DIBitmap);
    if (!pTextMask->Create(width, height, FXDIB_8bppMask))
      return TRUE;

    pTextMask->Clear(0);
    CFX_FxgeDevice text_device;
    text_device.Attach(pTextMask.get(), false, nullptr, false);
    for (uint32_t i = 0; i < pPageObj->m_ClipPath.GetTextCount(); i++) {
      CPDF_TextObject* textobj = pPageObj->m_ClipPath.GetText(i);
      if (!textobj) {
        break;
      }
      CFX_Matrix text_matrix;
      textobj->GetTextMatrix(&text_matrix);
      CPDF_TextRenderer::DrawTextPath(
          &text_device, textobj->m_nChars, textobj->m_pCharCodes,
          textobj->m_pCharPos, textobj->m_TextState.GetFont(),
          textobj->m_TextState.GetFontSize(), &text_matrix, &new_matrix,
          textobj->m_GraphState.GetObject(), (FX_ARGB)-1, 0, nullptr, 0);
    }
  }
  CPDF_RenderStatus bitmap_render;
  bitmap_render.Initialize(m_pContext, &bitmap_device, nullptr, m_pStopObj,
                           nullptr, nullptr, &m_Options, 0, m_bDropObjects,
                           pFormResource, TRUE);
  bitmap_render.ProcessObjectNoClip(pPageObj, &new_matrix);
  m_bStopped = bitmap_render.m_bStopped;
  if (pSMaskDict) {
    CFX_Matrix smask_matrix = *pPageObj->m_GeneralState.GetSMaskMatrix();
    smask_matrix.Concat(*pObj2Device);
    std::unique_ptr<CFX_DIBSource> pSMaskSource(
        LoadSMask(pSMaskDict, &rect, &smask_matrix));
    if (pSMaskSource)
      bitmap->MultiplyAlpha(pSMaskSource.get());
  }
  if (pTextMask) {
    bitmap->MultiplyAlpha(pTextMask.get());
    pTextMask.reset();
  }
  int32_t blitAlpha = 255;
  if (Transparency & PDFTRANS_GROUP && group_alpha != 1.0f) {
    blitAlpha = (int32_t)(group_alpha * 255);
#ifndef _SKIA_SUPPORT_
    bitmap->MultiplyAlpha(blitAlpha);
    blitAlpha = 255;
#endif
  }
  Transparency = m_Transparency;
  if (pPageObj->IsForm()) {
    Transparency |= PDFTRANS_GROUP;
  }
  CompositeDIBitmap(bitmap, rect.left, rect.top, 0, blitAlpha, blend_type,
                    Transparency);
#if defined _SKIA_SUPPORT_
  DebugVerifyDeviceIsPreMultiplied();
#endif
  return TRUE;
}
开发者ID:gradescope，项目名称:pdfium，代码行数:101，代码来源:fpdf_render.cpp

示例3: ProcessTransparency


//.........这里部分代码省略.........
      blend_type == FXDIB_BLEND_NORMAL && !bTextClip && !bGroupTransparent) {
    return FALSE;
  }
  FX_BOOL isolated = Transparency & PDFTRANS_ISOLATED;
  if (m_bPrint) {
    FX_BOOL bRet = FALSE;
    int rendCaps = m_pDevice->GetRenderCaps();
    if (!((Transparency & PDFTRANS_ISOLATED) || pSMaskDict || bTextClip) &&
        (rendCaps & FXRC_BLEND_MODE)) {
      int oldBlend = m_curBlend;
      m_curBlend = blend_type;
      bRet = DrawObjWithBlend(pPageObj, pObj2Device);
      m_curBlend = oldBlend;
    }
    if (!bRet) {
      DrawObjWithBackground(pPageObj, pObj2Device);
    }
    return TRUE;
  }
  FX_RECT rect = pPageObj->GetBBox(pObj2Device);
  rect.Intersect(m_pDevice->GetClipBox());
  if (rect.IsEmpty()) {
    return TRUE;
  }
  CFX_Matrix deviceCTM = m_pDevice->GetCTM();
  FX_FLOAT scaleX = FXSYS_fabs(deviceCTM.a);
  FX_FLOAT scaleY = FXSYS_fabs(deviceCTM.d);
  int width = FXSYS_round((FX_FLOAT)rect.Width() * scaleX);
  int height = FXSYS_round((FX_FLOAT)rect.Height() * scaleY);
  CFX_FxgeDevice bitmap_device;
  nonstd::unique_ptr<CFX_DIBitmap> oriDevice;
  if (!isolated && (m_pDevice->GetRenderCaps() & FXRC_GET_BITS)) {
    oriDevice.reset(new CFX_DIBitmap);
    if (!m_pDevice->CreateCompatibleBitmap(oriDevice.get(), width, height))
      return TRUE;

    m_pDevice->GetDIBits(oriDevice.get(), rect.left, rect.top);
  }
  if (!bitmap_device.Create(width, height, FXDIB_Argb, 0, oriDevice.get()))
    return TRUE;

  CFX_DIBitmap* bitmap = bitmap_device.GetBitmap();
  bitmap->Clear(0);
  CFX_AffineMatrix new_matrix = *pObj2Device;
  new_matrix.TranslateI(-rect.left, -rect.top);
  new_matrix.Scale(scaleX, scaleY);
  nonstd::unique_ptr<CFX_DIBitmap> pTextMask;
  if (bTextClip) {
    pTextMask.reset(new CFX_DIBitmap);
    if (!pTextMask->Create(width, height, FXDIB_8bppMask))
      return TRUE;

    pTextMask->Clear(0);
    CFX_FxgeDevice text_device;
    text_device.Attach(pTextMask.get());
    for (FX_DWORD i = 0; i < pPageObj->m_ClipPath.GetTextCount(); i++) {
      CPDF_TextObject* textobj = pPageObj->m_ClipPath.GetText(i);
      if (textobj == NULL) {
        break;
      }
      CFX_AffineMatrix text_matrix;
      textobj->GetTextMatrix(&text_matrix);
      CPDF_TextRenderer::DrawTextPath(
          &text_device, textobj->m_nChars, textobj->m_pCharCodes,
          textobj->m_pCharPos, textobj->m_TextState.GetFont(),
          textobj->m_TextState.GetFontSize(), &text_matrix, &new_matrix,
          textobj->m_GraphState, (FX_ARGB)-1, 0, NULL);
    }
  }
  CPDF_RenderStatus bitmap_render;
  bitmap_render.Initialize(m_pContext, &bitmap_device, NULL, m_pStopObj, NULL,
                           NULL, &m_Options, 0, m_bDropObjects, pFormResource,
                           TRUE);
  bitmap_render.ProcessObjectNoClip(pPageObj, &new_matrix);
  m_bStopped = bitmap_render.m_bStopped;
  if (pSMaskDict) {
    CFX_AffineMatrix smask_matrix;
    FXSYS_memcpy(&smask_matrix, pGeneralState->m_SMaskMatrix,
                 sizeof smask_matrix);
    smask_matrix.Concat(*pObj2Device);
    nonstd::unique_ptr<CFX_DIBSource> pSMaskSource(
        LoadSMask(pSMaskDict, &rect, &smask_matrix));
    if (pSMaskSource)
      bitmap->MultiplyAlpha(pSMaskSource.get());
  }
  if (pTextMask) {
    bitmap->MultiplyAlpha(pTextMask.get());
    pTextMask.reset();
  }
  if (Transparency & PDFTRANS_GROUP && group_alpha != 1.0f) {
    bitmap->MultiplyAlpha((int32_t)(group_alpha * 255));
  }
  Transparency = m_Transparency;
  if (pPageObj->m_Type == PDFPAGE_FORM) {
    Transparency |= PDFTRANS_GROUP;
  }
  CompositeDIBitmap(bitmap, rect.left, rect.top, 0, 255, blend_type,
                    Transparency);
  return TRUE;
}
开发者ID:，项目名称:，代码行数:101，代码来源:


注：本文中的CFX_DIBitmap::MultiplyAlpha方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。