FX_BOOL CPDF_RenderStatus::ProcessTransparency(CPDF_PageObject* pPageObj,
const CFX_Matrix* pObj2Device) {
#if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied();
#endif
int blend_type = pPageObj->m_GeneralState.GetBlendType();
if (blend_type == FXDIB_BLEND_UNSUPPORTED)
return TRUE;
CPDF_Dictionary* pSMaskDict =
ToDictionary(pPageObj->m_GeneralState.GetSoftMask());
if (pSMaskDict) {
if (pPageObj->IsImage() &&
pPageObj->AsImage()->GetImage()->GetDict()->KeyExist("SMask")) {
pSMaskDict = nullptr;
}
}
CPDF_Dictionary* pFormResource = nullptr;
FX_FLOAT group_alpha = 1.0f;
int Transparency = m_Transparency;
FX_BOOL bGroupTransparent = FALSE;
if (pPageObj->IsForm()) {
const CPDF_FormObject* pFormObj = pPageObj->AsForm();
group_alpha = pFormObj->m_GeneralState.GetFillAlpha();
Transparency = pFormObj->m_pForm->m_Transparency;
bGroupTransparent = !!(Transparency & PDFTRANS_ISOLATED);
if (pFormObj->m_pForm->m_pFormDict) {
pFormResource = pFormObj->m_pForm->m_pFormDict->GetDictBy("Resources");
}
}
bool bTextClip =
(pPageObj->m_ClipPath && pPageObj->m_ClipPath.GetTextCount() &&
m_pDevice->GetDeviceClass() == FXDC_DISPLAY &&
!(m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_SOFT_CLIP));
if ((m_Options.m_Flags & RENDER_OVERPRINT) && pPageObj->IsImage() &&
pPageObj->m_GeneralState.GetFillOP() &&
pPageObj->m_GeneralState.GetStrokeOP()) {
CPDF_Document* pDocument = nullptr;
CPDF_Page* pPage = nullptr;
if (m_pContext->GetPageCache()) {
pPage = m_pContext->GetPageCache()->GetPage();
pDocument = pPage->m_pDocument;
} else {
pDocument = pPageObj->AsImage()->GetImage()->GetDocument();
}
CPDF_Dictionary* pPageResources = pPage ? pPage->m_pPageResources : nullptr;
CPDF_Object* pCSObj = pPageObj->AsImage()
->GetImage()
->GetStream()
->GetDict()
->GetDirectObjectBy("ColorSpace");
CPDF_ColorSpace* pColorSpace =
pDocument->LoadColorSpace(pCSObj, pPageResources);
if (pColorSpace) {
int format = pColorSpace->GetFamily();
if (format == PDFCS_DEVICECMYK || format == PDFCS_SEPARATION ||
format == PDFCS_DEVICEN) {
blend_type = FXDIB_BLEND_DARKEN;
}
pDocument->GetPageData()->ReleaseColorSpace(pCSObj);
}
}
if (!pSMaskDict && group_alpha == 1.0f && blend_type == FXDIB_BLEND_NORMAL &&
!bTextClip && !bGroupTransparent) {
return FALSE;
}
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;
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;
}
FX_BOOL CPDF_RenderStatus::ProcessTransparency(
const CPDF_PageObject* pPageObj,
const CFX_AffineMatrix* pObj2Device) {
const CPDF_GeneralStateData* pGeneralState = pPageObj->m_GeneralState;
int blend_type =
pGeneralState ? pGeneralState->m_BlendType : FXDIB_BLEND_NORMAL;
if (blend_type == FXDIB_BLEND_UNSUPPORTED) {
return TRUE;
}
CPDF_Dictionary* pSMaskDict =
pGeneralState ? ToDictionary(pGeneralState->m_pSoftMask) : NULL;
if (pSMaskDict) {
if (pPageObj->m_Type == PDFPAGE_IMAGE &&
((CPDF_ImageObject*)pPageObj)
->m_pImage->GetDict()
->KeyExist(FX_BSTRC("SMask"))) {
pSMaskDict = NULL;
}
}
CPDF_Dictionary* pFormResource = NULL;
FX_FLOAT group_alpha = 1.0f;
int Transparency = m_Transparency;
FX_BOOL bGroupTransparent = FALSE;
if (pPageObj->m_Type == PDFPAGE_FORM) {
CPDF_FormObject* pFormObj = (CPDF_FormObject*)pPageObj;
const CPDF_GeneralStateData* pStateData =
pFormObj->m_GeneralState.GetObject();
if (pStateData) {
group_alpha = pStateData->m_FillAlpha;
}
Transparency = pFormObj->m_pForm->m_Transparency;
bGroupTransparent = !!(Transparency & PDFTRANS_ISOLATED);
if (pFormObj->m_pForm->m_pFormDict) {
pFormResource = pFormObj->m_pForm->m_pFormDict->GetDict("Resources");
}
}
FX_BOOL bTextClip = FALSE;
if (pPageObj->m_ClipPath.NotNull() && pPageObj->m_ClipPath.GetTextCount() &&
m_pDevice->GetDeviceClass() == FXDC_DISPLAY &&
!(m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_SOFT_CLIP)) {
bTextClip = TRUE;
}
if ((m_Options.m_Flags & RENDER_OVERPRINT) &&
pPageObj->m_Type == PDFPAGE_IMAGE && pGeneralState &&
pGeneralState->m_FillOP && pGeneralState->m_StrokeOP) {
CPDF_Document* pDocument = NULL;
CPDF_Page* pPage = NULL;
if (m_pContext->m_pPageCache) {
pPage = m_pContext->m_pPageCache->GetPage();
pDocument = pPage->m_pDocument;
} else {
pDocument = ((CPDF_ImageObject*)pPageObj)->m_pImage->GetDocument();
}
CPDF_Dictionary* pPageResources = pPage ? pPage->m_pPageResources : NULL;
CPDF_Object* pCSObj = ((CPDF_ImageObject*)pPageObj)
->m_pImage->GetStream()
->GetDict()
->GetElementValue(FX_BSTRC("ColorSpace"));
CPDF_ColorSpace* pColorSpace =
pDocument->LoadColorSpace(pCSObj, pPageResources);
if (pColorSpace) {
int format = pColorSpace->GetFamily();
if (format == PDFCS_DEVICECMYK || format == PDFCS_SEPARATION ||
format == PDFCS_DEVICEN) {
blend_type = FXDIB_BLEND_DARKEN;
}
pDocument->GetPageData()->ReleaseColorSpace(pCSObj);
}
}
if (pSMaskDict == NULL && group_alpha == 1.0f &&
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;
}
