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pdfium/pdfium/a474887cfcfd00d40dba82b572e58fc2ec91f06a/./core/fpdfapi/render/cpdf_renderstatus.cpp
blob: 18da44b2e534c69d3cbd217874d45c760f4fe967 [file]
// Copyright 2016 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "core/fpdfapi/render/cpdf_renderstatus.h"
#include <stdint.h>
#include <algorithm>
#include <memory>
#include <numeric>
#include <set>
#include <utility>
#include <vector>
#include "build/build_config.h"
#include "constants/transparency.h"
#include "core/fpdfapi/font/cpdf_font.h"
#include "core/fpdfapi/font/cpdf_type3char.h"
#include "core/fpdfapi/font/cpdf_type3font.h"
#include "core/fpdfapi/page/cpdf_docpagedata.h"
#include "core/fpdfapi/page/cpdf_form.h"
#include "core/fpdfapi/page/cpdf_formobject.h"
#include "core/fpdfapi/page/cpdf_function.h"
#include "core/fpdfapi/page/cpdf_graphicstates.h"
#include "core/fpdfapi/page/cpdf_image.h"
#include "core/fpdfapi/page/cpdf_imageobject.h"
#include "core/fpdfapi/page/cpdf_occontext.h"
#include "core/fpdfapi/page/cpdf_page.h"
#include "core/fpdfapi/page/cpdf_pageimagecache.h"
#include "core/fpdfapi/page/cpdf_pageobject.h"
#include "core/fpdfapi/page/cpdf_pathobject.h"
#include "core/fpdfapi/page/cpdf_shadingobject.h"
#include "core/fpdfapi/page/cpdf_shadingpattern.h"
#include "core/fpdfapi/page/cpdf_textobject.h"
#include "core/fpdfapi/page/cpdf_tilingpattern.h"
#include "core/fpdfapi/page/cpdf_transferfunc.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/fpdf_parser_utility.h"
#include "core/fpdfapi/render/charposlist.h"
#include "core/fpdfapi/render/cpdf_docrenderdata.h"
#include "core/fpdfapi/render/cpdf_imagerenderer.h"
#include "core/fpdfapi/render/cpdf_rendercontext.h"
#include "core/fpdfapi/render/cpdf_renderoptions.h"
#include "core/fpdfapi/render/cpdf_rendershading.h"
#include "core/fpdfapi/render/cpdf_rendertiling.h"
#include "core/fpdfapi/render/cpdf_scaledrenderbuffer.h"
#include "core/fpdfapi/render/cpdf_textrenderer.h"
#include "core/fpdfapi/render/cpdf_type3cache.h"
#include "core/fxcrt/autorestorer.h"
#include "core/fxcrt/check.h"
#include "core/fxcrt/compiler_specific.h"
#include "core/fxcrt/containers/contains.h"
#include "core/fxcrt/data_vector.h"
#include "core/fxcrt/fx_2d_size.h"
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxcrt/fx_system.h"
#include "core/fxcrt/notreached.h"
#include "core/fxcrt/span.h"
#include "core/fxcrt/stl_util.h"
#include "core/fxcrt/unowned_ptr.h"
#include "core/fxge/cfx_defaultrenderdevice.h"
#include "core/fxge/cfx_fillrenderoptions.h"
#include "core/fxge/cfx_glyphbitmap.h"
#include "core/fxge/cfx_path.h"
#include "core/fxge/dib/cfx_dibitmap.h"
#include "core/fxge/fx_font.h"
#include "core/fxge/renderdevicedriver_iface.h"
#include "core/fxge/text_char_pos.h"
#include "core/fxge/text_glyph_pos.h"
namespace {
constexpr int kRenderMaxRecursionDepth = 64;
int g_CurrentRecursionDepth = 0;
CFX_FillRenderOptions GetFillOptionsForDrawPathWithBlend(
const CPDF_RenderOptions::Options& options,
const CPDF_PathObject* path_obj,
CFX_FillRenderOptions::FillType fill_type,
bool is_stroke,
bool is_type3_char) {
CFX_FillRenderOptions fill_options(fill_type);
if (fill_type != CFX_FillRenderOptions::FillType::kNoFill &&
options.bRectAA) {
fill_options.rect_aa = true;
}
if (options.bNoPathSmooth) {
fill_options.aliased_path = true;
}
if (path_obj->general_state().GetStrokeAdjust()) {
fill_options.adjust_stroke = true;
}
if (is_stroke) {
fill_options.stroke = true;
}
if (is_type3_char) {
fill_options.text_mode = true;
}
return fill_options;
}
CFX_FillRenderOptions GetFillOptionsForDrawTextPath(
const CPDF_RenderOptions::Options& options,
const CPDF_TextObject* text_obj,
bool is_stroke,
bool is_fill) {
CFX_FillRenderOptions fill_options;
if (is_stroke && is_fill) {
fill_options.stroke = true;
fill_options.stroke_text_mode = true;
}
if (text_obj->general_state().GetStrokeAdjust()) {
fill_options.adjust_stroke = true;
}
if (options.bNoTextSmooth) {
fill_options.aliased_path = true;
}
return fill_options;
}
FXDIB_Format GetFormatForLuminosity(bool is_luminosity) {
if (!is_luminosity)
return FXDIB_Format::k8bppMask;
#if BUILDFLAG(IS_APPLE)
return FXDIB_Format::kRgb32;
#else
if (CFX_DefaultRenderDevice::UseSkiaRenderer()) {
return FXDIB_Format::kRgb32;
}
return FXDIB_Format::kRgb;
#endif
}
bool IsAvailableMatrix(const CFX_Matrix& matrix) {
if (matrix.a == 0 || matrix.d == 0)
return matrix.b != 0 && matrix.c != 0;
if (matrix.b == 0 || matrix.c == 0)
return matrix.a != 0 && matrix.d != 0;
return true;
}
bool MissingFillColor(const CPDF_ColorState* pColorState) {
return !pColorState->HasRef() || pColorState->GetFillColor()->IsNull();
}
bool MissingStrokeColor(const CPDF_ColorState* pColorState) {
return !pColorState->HasRef() || pColorState->GetStrokeColor()->IsNull();
}
bool Type3CharMissingFillColor(const CPDF_Type3Char* pChar,
const CPDF_ColorState* pColorState) {
return pChar && (!pChar->colored() || MissingFillColor(pColorState));
}
bool Type3CharMissingStrokeColor(const CPDF_Type3Char* pChar,
const CPDF_ColorState* pColorState) {
return pChar && (!pChar->colored() || MissingStrokeColor(pColorState));
}
} // namespace
CPDF_RenderStatus::CPDF_RenderStatus(CPDF_RenderContext* pContext,
CFX_RenderDevice* pDevice)
: m_pContext(pContext), m_pDevice(pDevice) {}
CPDF_RenderStatus::~CPDF_RenderStatus() = default;
void CPDF_RenderStatus::Initialize(const CPDF_RenderStatus* pParentStatus,
const CPDF_GraphicStates* pInitialStates) {
m_bPrint = m_pDevice->GetDeviceType() != DeviceType::kDisplay;
m_pPageResource.Reset(m_pContext->GetPageResources());
if (pInitialStates && !m_pType3Char) {
m_InitialStates = *pInitialStates;
if (pParentStatus) {
if (!m_InitialStates.color_state().HasFillColor()) {
m_InitialStates.mutable_color_state().SetFillColorRef(
pParentStatus->m_InitialStates.color_state().GetFillColorRef());
*m_InitialStates.mutable_color_state().GetMutableFillColor() =
*pParentStatus->m_InitialStates.color_state().GetFillColor();
}
if (!m_InitialStates.color_state().HasStrokeColor()) {
m_InitialStates.mutable_color_state().SetStrokeColorRef(
pParentStatus->m_InitialStates.color_state().GetFillColorRef());
*m_InitialStates.mutable_color_state().GetMutableStrokeColor() =
*pParentStatus->m_InitialStates.color_state().GetStrokeColor();
}
}
} else {
m_InitialStates.SetDefaultStates();
}
}
void CPDF_RenderStatus::RenderObjectList(
const CPDF_PageObjectHolder* pObjectHolder,
const CFX_Matrix& mtObj2Device) {
CFX_FloatRect clip_rect = mtObj2Device.GetInverse().TransformRect(
CFX_FloatRect(m_pDevice->GetClipBox()));
for (const auto& pCurObj : *pObjectHolder) {
if (pCurObj.get() == m_pStopObj) {
m_bStopped = true;
return;
}
if (!pCurObj)
continue;
if (pCurObj->GetRect().left > clip_rect.right ||
pCurObj->GetRect().right < clip_rect.left ||
pCurObj->GetRect().bottom > clip_rect.top ||
pCurObj->GetRect().top < clip_rect.bottom) {
continue;
}
RenderSingleObject(pCurObj.get(), mtObj2Device);
if (m_bStopped)
return;
}
}
void CPDF_RenderStatus::RenderSingleObject(CPDF_PageObject* pObj,
const CFX_Matrix& mtObj2Device) {
AutoRestorer<int> restorer(&g_CurrentRecursionDepth);
if (++g_CurrentRecursionDepth > kRenderMaxRecursionDepth) {
return;
}
m_pCurObj = pObj;
if (!m_Options.CheckPageObjectVisible(pObj)) {
return;
}
ProcessClipPath(pObj->clip_path(), mtObj2Device);
if (ProcessTransparency(pObj, mtObj2Device)) {
return;
}
ProcessObjectNoClip(pObj, mtObj2Device);
}
bool CPDF_RenderStatus::ContinueSingleObject(CPDF_PageObject* pObj,
const CFX_Matrix& mtObj2Device,
PauseIndicatorIface* pPause) {
if (m_pImageRenderer) {
if (m_pImageRenderer->Continue(pPause))
return true;
if (!m_pImageRenderer->GetResult())
DrawObjWithBackground(pObj, mtObj2Device);
m_pImageRenderer.reset();
return false;
}
m_pCurObj = pObj;
if (!m_Options.CheckPageObjectVisible(pObj))
return false;
ProcessClipPath(pObj->clip_path(), mtObj2Device);
if (ProcessTransparency(pObj, mtObj2Device))
return false;
if (!pObj->IsImage()) {
ProcessObjectNoClip(pObj, mtObj2Device);
return false;
}
m_pImageRenderer = std::make_unique<CPDF_ImageRenderer>(this);
if (!m_pImageRenderer->Start(pObj->AsImage(), mtObj2Device, false,
BlendMode::kNormal)) {
if (!m_pImageRenderer->GetResult())
DrawObjWithBackground(pObj, mtObj2Device);
m_pImageRenderer.reset();
return false;
}
return ContinueSingleObject(pObj, mtObj2Device, pPause);
}
FX_RECT CPDF_RenderStatus::GetObjectClippedRect(
const CPDF_PageObject* pObj,
const CFX_Matrix& mtObj2Device) const {
FX_RECT rect = pObj->GetTransformedBBox(mtObj2Device);
rect.Intersect(m_pDevice->GetClipBox());
return rect;
}
void CPDF_RenderStatus::ProcessObjectNoClip(CPDF_PageObject* pObj,
const CFX_Matrix& mtObj2Device) {
bool bRet = false;
switch (pObj->GetType()) {
case CPDF_PageObject::Type::kText:
bRet = ProcessText(pObj->AsText(), mtObj2Device, nullptr);
break;
case CPDF_PageObject::Type::kPath:
bRet = ProcessPath(pObj->AsPath(), mtObj2Device);
break;
case CPDF_PageObject::Type::kImage:
bRet = ProcessImage(pObj->AsImage(), mtObj2Device);
break;
case CPDF_PageObject::Type::kShading:
ProcessShading(pObj->AsShading(), mtObj2Device);
return;
case CPDF_PageObject::Type::kForm:
bRet = ProcessForm(pObj->AsForm(), mtObj2Device);
break;
}
if (!bRet)
DrawObjWithBackground(pObj, mtObj2Device);
}
bool CPDF_RenderStatus::DrawObjWithBlend(CPDF_PageObject* pObj,
const CFX_Matrix& mtObj2Device) {
switch (pObj->GetType()) {
case CPDF_PageObject::Type::kPath:
return ProcessPath(pObj->AsPath(), mtObj2Device);
case CPDF_PageObject::Type::kImage:
return ProcessImage(pObj->AsImage(), mtObj2Device);
case CPDF_PageObject::Type::kForm:
return ProcessForm(pObj->AsForm(), mtObj2Device);
case CPDF_PageObject::Type::kText:
case CPDF_PageObject::Type::kShading:
return false;
}
}
void CPDF_RenderStatus::DrawObjWithBackground(CPDF_PageObject* pObj,
const CFX_Matrix& mtObj2Device) {
FX_RECT rect = GetObjectClippedRect(pObj, mtObj2Device);
if (rect.IsEmpty())
return;
int res = (pObj->IsImage() && m_bPrint) ? 0 : 300;
CPDF_ScaledRenderBuffer buffer;
if (!buffer.Initialize(m_pContext, m_pDevice, rect, pObj, &m_Options, res)) {
return;
}
RetainPtr<const CPDF_Dictionary> pFormResource;
CFX_Matrix matrix = mtObj2Device * buffer.GetMatrix();
const CPDF_FormObject* pFormObj = pObj->AsForm();
if (pFormObj)
pFormResource = pFormObj->form()->GetDict()->GetDictFor("Resources");
CPDF_RenderStatus status(m_pContext, buffer.GetDevice());
status.SetOptions(m_Options);
status.SetDeviceMatrix(buffer.GetMatrix());
status.SetTransparency(m_Transparency);
status.SetDropObjects(m_bDropObjects);
status.SetFormResource(std::move(pFormResource));
status.Initialize(nullptr, nullptr);
status.RenderSingleObject(pObj, matrix);
buffer.OutputToDevice();
}
bool CPDF_RenderStatus::ProcessForm(const CPDF_FormObject* pFormObj,
const CFX_Matrix& mtObj2Device) {
RetainPtr<const CPDF_Dictionary> pOC =
pFormObj->form()->GetDict()->GetDictFor("OC");
if (pOC && !m_Options.CheckOCGDictVisible(pOC.Get()))
return true;
CFX_Matrix matrix = pFormObj->form_matrix() * mtObj2Device;
RetainPtr<const CPDF_Dictionary> pResources =
pFormObj->form()->GetDict()->GetDictFor("Resources");
CPDF_RenderStatus status(m_pContext, m_pDevice);
status.SetOptions(m_Options);
status.SetStopObject(m_pStopObj);
status.SetTransparency(m_Transparency);
status.SetDropObjects(m_bDropObjects);
status.SetFormResource(std::move(pResources));
status.Initialize(this, &pFormObj->graphic_states());
status.m_curBlend = m_curBlend;
{
CFX_RenderDevice::StateRestorer restorer(m_pDevice);
status.RenderObjectList(pFormObj->form(), matrix);
m_bStopped = status.m_bStopped;
}
return true;
}
bool CPDF_RenderStatus::ProcessPath(CPDF_PathObject* path_obj,
const CFX_Matrix& mtObj2Device) {
CFX_FillRenderOptions::FillType fill_type = path_obj->filltype();
bool stroke = path_obj->stroke();
ProcessPathPattern(path_obj, mtObj2Device, &fill_type, &stroke);
if (fill_type == CFX_FillRenderOptions::FillType::kNoFill && !stroke)
return true;
// If the option to convert fill paths to stroke is enabled for forced color,
// set |fill_type| to FillType::kNoFill and |stroke| to true.
CPDF_RenderOptions::Options& options = m_Options.GetOptions();
if (m_Options.ColorModeIs(CPDF_RenderOptions::Type::kForcedColor) &&
options.bConvertFillToStroke &&
fill_type != CFX_FillRenderOptions::FillType::kNoFill) {
stroke = true;
fill_type = CFX_FillRenderOptions::FillType::kNoFill;
}
uint32_t fill_argb = fill_type != CFX_FillRenderOptions::FillType::kNoFill
? GetFillArgb(path_obj)
: 0;
uint32_t stroke_argb = stroke ? GetStrokeArgb(path_obj) : 0;
CFX_Matrix path_matrix = path_obj->matrix() * mtObj2Device;
if (!IsAvailableMatrix(path_matrix))
return true;
return m_pDevice->DrawPathWithBlend(
*path_obj->path().GetObject(), &path_matrix,
path_obj->graph_state().GetObject(), fill_argb, stroke_argb,
GetFillOptionsForDrawPathWithBlend(options, path_obj, fill_type, stroke,
m_pType3Char),
m_curBlend);
}
RetainPtr<CPDF_TransferFunc> CPDF_RenderStatus::GetTransferFunc(
RetainPtr<const CPDF_Object> pObj) const {
DCHECK(pObj);
auto* pDocCache = CPDF_DocRenderData::FromDocument(m_pContext->GetDocument());
return pDocCache ? pDocCache->GetTransferFunc(std::move(pObj)) : nullptr;
}
FX_ARGB CPDF_RenderStatus::GetFillArgb(CPDF_PageObject* pObj) const {
if (Type3CharMissingFillColor(m_pType3Char, &pObj->color_state())) {
return m_T3FillColor;
}
return GetFillArgbForType3(pObj);
}
FX_ARGB CPDF_RenderStatus::GetFillArgbForType3(CPDF_PageObject* pObj) const {
const CPDF_ColorState* pColorState = &pObj->color_state();
if (MissingFillColor(pColorState))
pColorState = &m_InitialStates.color_state();
FX_COLORREF colorref = pColorState->GetFillColorRef();
if (colorref == 0xFFFFFFFF)
return 0;
int32_t alpha =
static_cast<int32_t>((pObj->general_state().GetFillAlpha() * 255));
RetainPtr<const CPDF_Object> pTR = pObj->general_state().GetTR();
if (pTR) {
if (!pObj->general_state().GetTransferFunc()) {
pObj->mutable_general_state().SetTransferFunc(
GetTransferFunc(std::move(pTR)));
}
if (pObj->general_state().GetTransferFunc()) {
colorref =
pObj->general_state().GetTransferFunc()->TranslateColor(colorref);
}
}
return m_Options.TranslateObjectFillColor(
AlphaAndColorRefToArgb(alpha, colorref), pObj->GetType());
}
FX_ARGB CPDF_RenderStatus::GetStrokeArgb(CPDF_PageObject* pObj) const {
const CPDF_ColorState* pColorState = &pObj->color_state();
if (Type3CharMissingStrokeColor(m_pType3Char, pColorState))
return m_T3FillColor;
if (MissingStrokeColor(pColorState))
pColorState = &m_InitialStates.color_state();
FX_COLORREF colorref = pColorState->GetStrokeColorRef();
if (colorref == 0xFFFFFFFF)
return 0;
int32_t alpha = static_cast<int32_t>(pObj->general_state().GetStrokeAlpha() *
255); // not rounded.
RetainPtr<const CPDF_Object> pTR = pObj->general_state().GetTR();
if (pTR) {
if (!pObj->general_state().GetTransferFunc()) {
pObj->mutable_general_state().SetTransferFunc(
GetTransferFunc(std::move(pTR)));
}
if (pObj->general_state().GetTransferFunc()) {
colorref =
pObj->general_state().GetTransferFunc()->TranslateColor(colorref);
}
}
return m_Options.TranslateObjectStrokeColor(
AlphaAndColorRefToArgb(alpha, colorref), pObj->GetType());
}
void CPDF_RenderStatus::ProcessClipPath(const CPDF_ClipPath& ClipPath,
const CFX_Matrix& mtObj2Device) {
if (!ClipPath.HasRef()) {
if (m_LastClipPath.HasRef()) {
m_pDevice->RestoreState(true);
m_LastClipPath.SetNull();
}
return;
}
if (m_LastClipPath == ClipPath)
return;
m_LastClipPath = ClipPath;
m_pDevice->RestoreState(true);
for (size_t i = 0; i < ClipPath.GetPathCount(); ++i) {
const CFX_Path* pPath = ClipPath.GetPath(i).GetObject();
if (!pPath)
continue;
if (pPath->GetPoints().empty()) {
CFX_Path empty_path;
empty_path.AppendRect(-1, -1, 0, 0);
m_pDevice->SetClip_PathFill(empty_path, nullptr,
CFX_FillRenderOptions::WindingOptions());
} else {
m_pDevice->SetClip_PathFill(
*pPath, &mtObj2Device,
CFX_FillRenderOptions(ClipPath.GetClipType(i)));
}
}
if (ClipPath.GetTextCount() == 0)
return;
if (!m_bPrint &&
!(m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_SOFT_CLIP)) {
return;
}
std::unique_ptr<CFX_Path> pTextClippingPath;
for (size_t i = 0; i < ClipPath.GetTextCount(); ++i) {
CPDF_TextObject* pText = ClipPath.GetText(i);
if (pText) {
if (!pTextClippingPath)
pTextClippingPath = std::make_unique<CFX_Path>();
ProcessText(pText, mtObj2Device, pTextClippingPath.get());
continue;
}
if (!pTextClippingPath)
continue;
CFX_FillRenderOptions fill_options(CFX_FillRenderOptions::WindingOptions());
if (m_Options.GetOptions().bNoTextSmooth) {
fill_options.aliased_path = true;
}
m_pDevice->SetClip_PathFill(*pTextClippingPath, nullptr, fill_options);
pTextClippingPath.reset();
}
}
bool CPDF_RenderStatus::ClipPattern(const CPDF_PageObject* page_obj,
const CFX_Matrix& mtObj2Device,
bool stroke) {
if (page_obj->IsPath())
return SelectClipPath(page_obj->AsPath(), mtObj2Device, stroke);
if (page_obj->IsImage()) {
m_pDevice->SetClip_Rect(page_obj->GetTransformedBBox(mtObj2Device));
return true;
}
return false;
}
bool CPDF_RenderStatus::SelectClipPath(const CPDF_PathObject* path_obj,
const CFX_Matrix& mtObj2Device,
bool stroke) {
CFX_Matrix path_matrix = path_obj->matrix() * mtObj2Device;
if (stroke) {
return m_pDevice->SetClip_PathStroke(*path_obj->path().GetObject(),
&path_matrix,
path_obj->graph_state().GetObject());
}
CFX_FillRenderOptions fill_options(path_obj->filltype());
if (m_Options.GetOptions().bNoPathSmooth) {
fill_options.aliased_path = true;
}
return m_pDevice->SetClip_PathFill(*path_obj->path().GetObject(),
&path_matrix, fill_options);
}
bool CPDF_RenderStatus::ProcessTransparency(CPDF_PageObject* pPageObj,
const CFX_Matrix& mtObj2Device) {
const BlendMode blend_type = pPageObj->general_state().GetBlendType();
RetainPtr<CPDF_Dictionary> pSMaskDict =
pPageObj->mutable_general_state().GetMutableSoftMask();
if (pSMaskDict) {
if (pPageObj->IsImage() &&
pPageObj->AsImage()->GetImage()->GetDict()->KeyExist("SMask")) {
pSMaskDict = nullptr;
}
}
RetainPtr<const CPDF_Dictionary> pFormResource;
float group_alpha = 1.0f;
CPDF_Transparency transparency = m_Transparency;
bool bGroupTransparent = false;
const CPDF_FormObject* pFormObj = pPageObj->AsForm();
if (pFormObj) {
group_alpha = pFormObj->general_state().GetFillAlpha();
transparency = pFormObj->form()->GetTransparency();
bGroupTransparent = transparency.IsIsolated();
pFormResource = pFormObj->form()->GetDict()->GetDictFor("Resources");
}
bool bTextClip =
(pPageObj->clip_path().HasRef() &&
pPageObj->clip_path().GetTextCount() > 0 && !m_bPrint &&
!(m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_SOFT_CLIP));
if (!pSMaskDict && group_alpha == 1.0f && blend_type == BlendMode::kNormal &&
!bTextClip && !bGroupTransparent) {
return false;
}
if (m_bPrint) {
bool bRet = false;
int rendCaps = m_pDevice->GetRenderCaps();
if (!(transparency.IsIsolated() || pSMaskDict || bTextClip) &&
(rendCaps & FXRC_BLEND_MODE)) {
BlendMode oldBlend = m_curBlend;
m_curBlend = blend_type;
bRet = DrawObjWithBlend(pPageObj, mtObj2Device);
m_curBlend = oldBlend;
}
if (!bRet) {
DrawObjWithBackground(pPageObj, mtObj2Device);
}
return true;
}
FX_RECT rect = pPageObj->GetTransformedBBox(mtObj2Device);
rect.Intersect(m_pDevice->GetClipBox());
if (rect.IsEmpty())
return true;
const int width = rect.Width();
const int height = rect.Height();
CFX_DefaultRenderDevice bitmap_device;
RetainPtr<CFX_DIBitmap> backdrop;
if (!transparency.IsIsolated() &&
(m_pDevice->GetRenderCaps() & FXRC_GET_BITS)) {
backdrop = pdfium::MakeRetain<CFX_DIBitmap>();
if (!m_pDevice->CreateCompatibleBitmap(backdrop, width, height))
return true;
m_pDevice->GetDIBits(backdrop, rect.left, rect.top);
}
if (!bitmap_device.CreateWithBackdrop(width, height, FXDIB_Format::kArgb,
backdrop)) {
return true;
}
CFX_Matrix new_matrix = mtObj2Device;
new_matrix.Translate(-rect.left, -rect.top);
RetainPtr<CFX_DIBitmap> text_mask_bitmap;
if (bTextClip) {
text_mask_bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
if (!text_mask_bitmap->Create(width, height, FXDIB_Format::k8bppMask)) {
return true;
}
CFX_DefaultRenderDevice text_device;
text_device.Attach(text_mask_bitmap);
for (size_t i = 0; i < pPageObj->clip_path().GetTextCount(); ++i) {
CPDF_TextObject* textobj = pPageObj->clip_path().GetText(i);
if (!textobj)
break;
// TODO(thestig): Should we check the return value here?
CPDF_TextRenderer::DrawTextPath(
&text_device, textobj->GetCharCodes(), textobj->GetCharPositions(),
textobj->text_state().GetFont().Get(),
textobj->text_state().GetFontSize(), textobj->GetTextMatrix(),
&new_matrix, textobj->graph_state().GetObject(), 0xffffffff, 0,
nullptr, CFX_FillRenderOptions());
}
}
CPDF_RenderStatus bitmap_render(m_pContext, &bitmap_device);
bitmap_render.SetOptions(m_Options);
bitmap_render.SetStopObject(m_pStopObj);
bitmap_render.SetStdCS(true);
bitmap_render.SetDropObjects(m_bDropObjects);
bitmap_render.SetFormResource(std::move(pFormResource));
bitmap_render.Initialize(nullptr, nullptr);
bitmap_render.ProcessObjectNoClip(pPageObj, new_matrix);
#if defined(PDF_USE_SKIA)
if (CFX_DefaultRenderDevice::UseSkiaRenderer()) {
// Safe because `CFX_SkiaDeviceDriver` always uses pre-multiplied alpha.
// TODO(crbug.com/42271020): Remove the need for this.
bitmap_device.GetBitmap()->ForcePreMultiply();
}
#endif
m_bStopped = bitmap_render.m_bStopped;
if (pSMaskDict) {
CFX_Matrix smask_matrix =
*pPageObj->general_state().GetSMaskMatrix() * mtObj2Device;
RetainPtr<CFX_DIBitmap> smask_bitmap =
LoadSMask(pSMaskDict.Get(), rect, smask_matrix);
if (smask_bitmap) {
bitmap_device.MultiplyAlphaMask(std::move(smask_bitmap));
}
}
if (text_mask_bitmap) {
bitmap_device.MultiplyAlphaMask(std::move(text_mask_bitmap));
}
if (transparency.IsGroup()) {
bitmap_device.MultiplyAlpha(group_alpha);
}
transparency = m_Transparency;
if (pPageObj->IsForm()) {
transparency.SetGroup();
}
#if defined(PDF_USE_SKIA)
if (CFX_DefaultRenderDevice::UseSkiaRenderer()) {
bitmap_device.GetBitmap()->UnPreMultiply();
}
#endif
CompositeDIBitmap(bitmap_device.GetBitmap(), rect.left, rect.top,
/*mask_argb=*/0, /*alpha=*/1.0f, blend_type, transparency);
return true;
}
FX_RECT CPDF_RenderStatus::GetClippedBBox(const FX_RECT& rect) const {
FX_RECT bbox = rect;
bbox.Intersect(m_pDevice->GetClipBox());
return bbox;
}
RetainPtr<CFX_DIBitmap> CPDF_RenderStatus::GetBackdrop(
const CPDF_PageObject* pObj,
const FX_RECT& bbox,
bool bBackAlphaRequired) {
int width = bbox.Width();
int height = bbox.Height();
auto backdrop = pdfium::MakeRetain<CFX_DIBitmap>();
if (bBackAlphaRequired && !m_bDropObjects) {
if (!backdrop->Create(width, height, FXDIB_Format::kArgb)) {
return nullptr;
}
} else {
if (!m_pDevice->CreateCompatibleBitmap(backdrop, width, height)) {
return nullptr;
}
}
const int cap_to_check =
backdrop->IsAlphaFormat() ? FXRC_ALPHA_OUTPUT : FXRC_GET_BITS;
if (m_pDevice->GetRenderCaps() & cap_to_check) {
m_pDevice->GetDIBits(backdrop, bbox.left, bbox.top);
return backdrop;
}
CFX_Matrix FinalMatrix = m_DeviceMatrix;
FinalMatrix.Translate(-bbox.left, -bbox.top);
if (!backdrop->IsAlphaFormat()) {
backdrop->Clear(0xffffffff);
}
CFX_DefaultRenderDevice device;
device.Attach(backdrop);
m_pContext->Render(&device, pObj, &m_Options, &FinalMatrix);
return backdrop;
}
std::unique_ptr<CPDF_GraphicStates> CPDF_RenderStatus::CloneObjStates(
const CPDF_GraphicStates* pSrcStates,
bool stroke) {
if (!pSrcStates)
return nullptr;
auto pStates = std::make_unique<CPDF_GraphicStates>(*pSrcStates);
const CPDF_Color* pObjColor = stroke
? pSrcStates->color_state().GetStrokeColor()
: pSrcStates->color_state().GetFillColor();
if (!pObjColor->IsNull()) {
pStates->mutable_color_state().SetFillColorRef(
stroke ? pSrcStates->color_state().GetStrokeColorRef()
: pSrcStates->color_state().GetFillColorRef());
pStates->mutable_color_state().SetStrokeColorRef(
pStates->color_state().GetFillColorRef());
}
return pStates;
}
bool CPDF_RenderStatus::ProcessText(CPDF_TextObject* textobj,
const CFX_Matrix& mtObj2Device,
CFX_Path* clipping_path) {
if (textobj->GetCharCodes().empty())
return true;
const TextRenderingMode text_render_mode =
textobj->text_state().GetTextMode();
if (text_render_mode == TextRenderingMode::MODE_INVISIBLE)
return true;
RetainPtr<CPDF_Font> pFont = textobj->text_state().GetFont();
if (pFont->IsType3Font())
return ProcessType3Text(textobj, mtObj2Device);
bool is_fill = false;
bool is_stroke = false;
bool is_clip = false;
if (clipping_path) {
is_clip = true;
} else {
switch (text_render_mode) {
case TextRenderingMode::MODE_FILL:
case TextRenderingMode::MODE_FILL_CLIP:
is_fill = true;
break;
case TextRenderingMode::MODE_STROKE:
case TextRenderingMode::MODE_STROKE_CLIP:
if (pFont->HasFace())
is_stroke = true;
else
is_fill = true;
break;
case TextRenderingMode::MODE_FILL_STROKE:
case TextRenderingMode::MODE_FILL_STROKE_CLIP:
is_fill = true;
if (pFont->HasFace())
is_stroke = true;
break;
case TextRenderingMode::MODE_INVISIBLE:
// Already handled above, but the compiler is not smart enough to
// realize it.
NOTREACHED_NORETURN();
case TextRenderingMode::MODE_CLIP:
return true;
case TextRenderingMode::MODE_UNKNOWN:
NOTREACHED_NORETURN();
}
}
FX_ARGB stroke_argb = 0;
FX_ARGB fill_argb = 0;
bool bPattern = false;
if (is_stroke) {
if (textobj->color_state().GetStrokeColor()->IsPattern()) {
bPattern = true;
} else {
stroke_argb = GetStrokeArgb(textobj);
}
}
if (is_fill) {
if (textobj->color_state().GetFillColor()->IsPattern()) {
bPattern = true;
} else {
fill_argb = GetFillArgb(textobj);
}
}
CFX_Matrix text_matrix = textobj->GetTextMatrix();
if (!IsAvailableMatrix(text_matrix))
return true;
float font_size = textobj->text_state().GetFontSize();
if (bPattern) {
DrawTextPathWithPattern(textobj, mtObj2Device, pFont.Get(), font_size,
text_matrix, is_fill, is_stroke);
return true;
}
if (is_clip || is_stroke) {
const CFX_Matrix* pDeviceMatrix = &mtObj2Device;
CFX_Matrix device_matrix;
if (is_stroke) {
pdfium::span<const float> pCTM = textobj->text_state().GetCTM();
if (pCTM[0] != 1.0f || pCTM[3] != 1.0f) {
CFX_Matrix ctm(pCTM[0], pCTM[1], pCTM[2], pCTM[3], 0, 0);
text_matrix *= ctm.GetInverse();
device_matrix = ctm * mtObj2Device;
pDeviceMatrix = &device_matrix;
}
}
return CPDF_TextRenderer::DrawTextPath(
m_pDevice, textobj->GetCharCodes(), textobj->GetCharPositions(),
pFont.Get(), font_size, text_matrix, pDeviceMatrix,
textobj->graph_state().GetObject(), fill_argb, stroke_argb,
clipping_path,
GetFillOptionsForDrawTextPath(m_Options.GetOptions(), textobj,
is_stroke, is_fill));
}
text_matrix.Concat(mtObj2Device);
return CPDF_TextRenderer::DrawNormalText(
m_pDevice, textobj->GetCharCodes(), textobj->GetCharPositions(),
pFont.Get(), font_size, text_matrix, fill_argb, m_Options);
}
// TODO(npm): Font fallback for type 3 fonts? (Completely separate code!!)
bool CPDF_RenderStatus::ProcessType3Text(CPDF_TextObject* textobj,
const CFX_Matrix& mtObj2Device) {
CPDF_Type3Font* pType3Font = textobj->text_state().GetFont()->AsType3Font();
if (pdfium::Contains(m_Type3FontCache, pType3Font))
return true;
FX_ARGB fill_argb = GetFillArgbForType3(textobj);
int fill_alpha = FXARGB_A(fill_argb);
if (m_bPrint && fill_alpha < 255)
return false;
CFX_Matrix text_matrix = textobj->GetTextMatrix();
CFX_Matrix char_matrix = pType3Font->GetFontMatrix();
float font_size = textobj->text_state().GetFontSize();
char_matrix.Scale(font_size, font_size);
// Must come before |glyphs|, because |glyphs| points into |refTypeCache|.
std::set<RetainPtr<CPDF_Type3Cache>> refTypeCache;
std::vector<TextGlyphPos> glyphs;
if (!m_bPrint)
glyphs.resize(textobj->GetCharCodes().size());
for (size_t iChar = 0; iChar < textobj->GetCharCodes().size(); ++iChar) {
uint32_t charcode = textobj->GetCharCodes()[iChar];
if (charcode == static_cast<uint32_t>(-1))
continue;
CPDF_Type3Char* pType3Char = pType3Font->LoadChar(charcode);
if (!pType3Char)
continue;
CFX_Matrix matrix = char_matrix;
matrix.e += iChar > 0 ? textobj->GetCharPositions()[iChar - 1] : 0;
matrix.Concat(text_matrix);
matrix.Concat(mtObj2Device);
if (!pType3Char->LoadBitmapFromSoleImageOfForm()) {
if (!glyphs.empty()) {
for (size_t i = 0; i < iChar; ++i) {
const TextGlyphPos& glyph = glyphs[i];
if (!glyph.m_pGlyph)
continue;
std::optional<CFX_Point> point = glyph.GetOrigin({0, 0});
if (!point.has_value())
continue;
m_pDevice->SetBitMask(glyph.m_pGlyph->GetBitmap(), point->x, point->y,
fill_argb);
}
glyphs.clear();
}
std::unique_ptr<CPDF_GraphicStates> pStates =
CloneObjStates(&textobj->graphic_states(), false);
CPDF_RenderOptions options = m_Options;
options.GetOptions().bForceHalftone = true;
options.GetOptions().bRectAA = true;
const auto* pForm = static_cast<const CPDF_Form*>(pType3Char->form());
RetainPtr<const CPDF_Dictionary> pFormResource =
pForm->GetDict()->GetDictFor("Resources");
if (fill_alpha == 255) {
CPDF_RenderStatus status(m_pContext, m_pDevice);
status.SetOptions(options);
status.SetTransparency(pForm->GetTransparency());
status.SetType3Char(pType3Char);
status.SetFillColor(fill_argb);
status.SetDropObjects(m_bDropObjects);
status.SetFormResource(std::move(pFormResource));
status.Initialize(this, pStates.get());
status.m_Type3FontCache = m_Type3FontCache;
status.m_Type3FontCache.emplace_back(pType3Font);
CFX_RenderDevice::StateRestorer restorer(m_pDevice);
status.RenderObjectList(pForm, matrix);
} else {
FX_RECT rect =
matrix.TransformRect(pForm->CalcBoundingBox()).GetOuterRect();
if (!rect.Valid())
continue;
CFX_DefaultRenderDevice bitmap_device;
if (!bitmap_device.Create(rect.Width(), rect.Height(),
FXDIB_Format::kArgb)) {
return true;
}
CPDF_RenderStatus status(m_pContext, &bitmap_device);
status.SetOptions(options);
status.SetTransparency(pForm->GetTransparency());
status.SetType3Char(pType3Char);
status.SetFillColor(fill_argb);
status.SetDropObjects(m_bDropObjects);
status.SetFormResource(std::move(pFormResource));
status.Initialize(this, pStates.get());
status.m_Type3FontCache = m_Type3FontCache;
status.m_Type3FontCache.emplace_back(pType3Font);
matrix.Translate(-rect.left, -rect.top);
status.RenderObjectList(pForm, matrix);
m_pDevice->SetDIBits(bitmap_device.GetBitmap(), rect.left, rect.top);
}
} else if (pType3Char->GetBitmap()) {
if (m_bPrint) {
CFX_Matrix image_matrix = pType3Char->matrix() * matrix;
CPDF_ImageRenderer renderer(this);
if (renderer.Start(pType3Char->GetBitmap(), fill_argb, image_matrix,
FXDIB_ResampleOptions(), false)) {
renderer.Continue(nullptr);
}
if (!renderer.GetResult())
return false;
} else {
CPDF_Document* pDoc = pType3Font->GetDocument();
RetainPtr<CPDF_Type3Cache> pCache =
CPDF_DocRenderData::FromDocument(pDoc)->GetCachedType3(pType3Font);
const CFX_GlyphBitmap* pBitmap = pCache->LoadGlyph(charcode, matrix);
if (!pBitmap)
continue;
refTypeCache.insert(std::move(pCache));
CFX_Point origin(FXSYS_roundf(matrix.e), FXSYS_roundf(matrix.f));
if (glyphs.empty()) {
FX_SAFE_INT32 left = origin.x;
left += pBitmap->left();
if (!left.IsValid())
continue;
FX_SAFE_INT32 top = origin.y;
top -= pBitmap->top();
if (!top.IsValid())
continue;
m_pDevice->SetBitMask(pBitmap->GetBitmap(), left.ValueOrDie(),
top.ValueOrDie(), fill_argb);
} else {
glyphs[iChar].m_pGlyph = pBitmap;
glyphs[iChar].m_Origin = origin;
}
}
}
}
if (glyphs.empty())
return true;
FX_RECT rect = GetGlyphsBBox(glyphs, 0);
auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>();
if (!bitmap->Create(rect.Width(), rect.Height(), FXDIB_Format::k8bppMask)) {
return true;
}
for (const TextGlyphPos& glyph : glyphs) {
if (!glyph.m_pGlyph || !glyph.m_pGlyph->GetBitmap()->IsMaskFormat())
continue;
std::optional<CFX_Point> point = glyph.GetOrigin({rect.left, rect.top});
if (!point.has_value())
continue;
bitmap->CompositeMask(
point->x, point->y, glyph.m_pGlyph->GetBitmap()->GetWidth(),
glyph.m_pGlyph->GetBitmap()->GetHeight(), glyph.m_pGlyph->GetBitmap(),
fill_argb, 0, 0, BlendMode::kNormal, nullptr, false);
}
m_pDevice->SetBitMask(std::move(bitmap), rect.left, rect.top, fill_argb);
return true;
}
void CPDF_RenderStatus::DrawTextPathWithPattern(const CPDF_TextObject* textobj,
const CFX_Matrix& mtObj2Device,
CPDF_Font* pFont,
float font_size,
const CFX_Matrix& mtTextMatrix,
bool fill,
bool stroke) {
if (!stroke) {
std::vector<std::unique_ptr<CPDF_TextObject>> pCopy;
pCopy.push_back(textobj->Clone());
CPDF_PathObject path;
path.set_filltype(CFX_FillRenderOptions::FillType::kWinding);
path.mutable_clip_path().CopyClipPath(m_LastClipPath);
path.mutable_clip_path().AppendTexts(&pCopy);
path.mutable_color_state() = textobj->color_state();
path.mutable_general_state() = textobj->general_state();
path.path().AppendFloatRect(textobj->GetRect());
path.SetRect(textobj->GetRect());
AutoRestorer<UnownedPtr<const CPDF_PageObject>> restorer2(&m_pCurObj);
RenderSingleObject(&path, mtObj2Device);
return;
}
std::vector<TextCharPos> char_pos_list = GetCharPosList(
textobj->GetCharCodes(), textobj->GetCharPositions(), pFont, font_size);
for (const TextCharPos& charpos : char_pos_list) {
auto* font = charpos.m_FallbackFontPosition == -1
? pFont->GetFont()
: pFont->GetFontFallback(charpos.m_FallbackFontPosition);
const CFX_Path* pPath =
font->LoadGlyphPath(charpos.m_GlyphIndex, charpos.m_FontCharWidth);
if (!pPath)
continue;
CPDF_PathObject path;
path.mutable_graph_state() = textobj->graph_state();
path.mutable_color_state() = textobj->color_state();
CFX_Matrix matrix = charpos.GetEffectiveMatrix(CFX_Matrix(
font_size, 0, 0, font_size, charpos.m_Origin.x, charpos.m_Origin.y));
matrix.Concat(mtTextMatrix);
path.set_stroke(stroke);
path.set_filltype(fill ? CFX_FillRenderOptions::FillType::kWinding
: CFX_FillRenderOptions::FillType::kNoFill);
path.path().Append(*pPath, &matrix);
path.SetPathMatrix(CFX_Matrix());
ProcessPath(&path, mtObj2Device);
}
}
void CPDF_RenderStatus::DrawShadingPattern(CPDF_ShadingPattern* pattern,
const CPDF_PageObject* pPageObj,
const CFX_Matrix& mtObj2Device,
bool stroke) {
if (!pattern->Load())
return;
CFX_RenderDevice::StateRestorer restorer(m_pDevice);
if (!ClipPattern(pPageObj, mtObj2Device, stroke))
return;
FX_RECT rect = GetObjectClippedRect(pPageObj, mtObj2Device);
if (rect.IsEmpty())
return;
CFX_Matrix matrix = pattern->pattern_to_form() * mtObj2Device;
int alpha =
FXSYS_roundf(255 * (stroke ? pPageObj->general_state().GetStrokeAlpha()
: pPageObj->general_state().GetFillAlpha()));
CPDF_RenderShading::Draw(m_pDevice, m_pContext, m_pCurObj, pattern, matrix,
rect, alpha, m_Options);
}
void CPDF_RenderStatus::ProcessShading(const CPDF_ShadingObject* pShadingObj,
const CFX_Matrix& mtObj2Device) {
FX_RECT rect = GetObjectClippedRect(pShadingObj, mtObj2Device);
if (rect.IsEmpty())
return;
CFX_Matrix matrix = pShadingObj->matrix() * mtObj2Device;
CPDF_RenderShading::Draw(
m_pDevice, m_pContext, m_pCurObj, pShadingObj->pattern(), matrix, rect,
FXSYS_roundf(255 * pShadingObj->general_state().GetFillAlpha()),
m_Options);
}
void CPDF_RenderStatus::DrawTilingPattern(CPDF_TilingPattern* pattern,
CPDF_PageObject* pPageObj,
const CFX_Matrix& mtObj2Device,
bool stroke) {
const std::unique_ptr<CPDF_Form> pPatternForm = pattern->Load(pPageObj);
if (!pPatternForm)
return;
CFX_RenderDevice::StateRestorer restorer(m_pDevice);
if (!ClipPattern(pPageObj, mtObj2Device, stroke))
return;
FX_RECT clip_box = m_pDevice->GetClipBox();
if (clip_box.IsEmpty())
return;
RetainPtr<CFX_DIBitmap> screen =
CPDF_RenderTiling::Draw(this, pPageObj, pattern, pPatternForm.get(),
mtObj2Device, clip_box, stroke);
if (!screen) {
return;
}
constexpr FX_ARGB kMask = 0;
CompositeDIBitmap(std::move(screen), clip_box.left, clip_box.top, kMask,
/*alpha=*/1.0f, BlendMode::kNormal, CPDF_Transparency());
}
void CPDF_RenderStatus::DrawPathWithPattern(CPDF_PathObject* path_obj,
const CFX_Matrix& mtObj2Device,
const CPDF_Color* pColor,
bool stroke) {
RetainPtr<CPDF_Pattern> pattern = pColor->GetPattern();
if (!pattern)
return;
if (CPDF_TilingPattern* pTilingPattern = pattern->AsTilingPattern())
DrawTilingPattern(pTilingPattern, path_obj, mtObj2Device, stroke);
else if (CPDF_ShadingPattern* pShadingPattern = pattern->AsShadingPattern())
DrawShadingPattern(pShadingPattern, path_obj, mtObj2Device, stroke);
}
void CPDF_RenderStatus::ProcessPathPattern(
CPDF_PathObject* path_obj,
const CFX_Matrix& mtObj2Device,
CFX_FillRenderOptions::FillType* fill_type,
bool* stroke) {
DCHECK(fill_type);
DCHECK(stroke);
if (*fill_type != CFX_FillRenderOptions::FillType::kNoFill) {
const CPDF_Color& FillColor = *path_obj->color_state().GetFillColor();
if (FillColor.IsPattern()) {
DrawPathWithPattern(path_obj, mtObj2Device, &FillColor, false);
*fill_type = CFX_FillRenderOptions::FillType::kNoFill;
}
}
if (*stroke) {
const CPDF_Color& StrokeColor = *path_obj->color_state().GetStrokeColor();
if (StrokeColor.IsPattern()) {
DrawPathWithPattern(path_obj, mtObj2Device, &StrokeColor, true);
*stroke = false;
}
}
}
bool CPDF_RenderStatus::ProcessImage(CPDF_ImageObject* pImageObj,
const CFX_Matrix& mtObj2Device) {
CPDF_ImageRenderer render(this);
if (render.Start(pImageObj, mtObj2Device, m_bStdCS, m_curBlend))
render.Continue(nullptr);
return render.GetResult();
}
void CPDF_RenderStatus::CompositeDIBitmap(
RetainPtr<CFX_DIBitmap> bitmap,
int left,
int top,
FX_ARGB mask_argb,
float alpha,
BlendMode blend_mode,
const CPDF_Transparency& transparency) {
CHECK(bitmap);
if (blend_mode == BlendMode::kNormal) {
if (!bitmap->IsMaskFormat()) {
if (alpha != 1.0f) {
if (CFX_DefaultRenderDevice::UseSkiaRenderer()) {
std::unique_ptr<CFX_ImageRenderer> dummy;
CFX_Matrix matrix = CFX_RenderDevice::GetFlipMatrix(
bitmap->GetWidth(), bitmap->GetHeight(), left, top);
m_pDevice->StartDIBits(std::move(bitmap), alpha, /*argb=*/0, matrix,
FXDIB_ResampleOptions(), &dummy);
return;
}
bitmap->MultiplyAlpha(alpha);
}
if (m_pDevice->SetDIBits(bitmap, left, top)) {
return;
}
} else {
uint32_t fill_argb = m_Options.TranslateColor(mask_argb);
if (alpha != 1.0f) {
uint8_t* fill_argb8 = reinterpret_cast<uint8_t*>(&fill_argb);
UNSAFE_TODO(fill_argb8[3]) *= FXSYS_roundf(alpha * 255) / 255;
}
if (m_pDevice->SetBitMask(bitmap, left, top, fill_argb)) {
return;
}
}
}
bool bIsolated = transparency.IsIsolated();
bool bBackAlphaRequired =
blend_mode != BlendMode::kNormal && bIsolated && !m_bDropObjects;
bool bGetBackGround =
((m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT)) ||
(!(m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT) &&
(m_pDevice->GetRenderCaps() & FXRC_GET_BITS) && !bBackAlphaRequired);
if (bGetBackGround) {
if (bIsolated || !transparency.IsGroup()) {
if (!bitmap->IsMaskFormat()) {
m_pDevice->SetDIBitsWithBlend(std::move(bitmap), left, top, blend_mode);
}
return;
}
FX_RECT rect(left, top, left + bitmap->GetWidth(),
top + bitmap->GetHeight());
rect.Intersect(m_pDevice->GetClipBox());
RetainPtr<CFX_DIBitmap> pClone;
if (m_pDevice->GetBackDrop() && m_pDevice->GetBitmap()) {
pClone = m_pDevice->GetBackDrop()->ClipTo(rect);
if (!pClone)
return;
pClone->CompositeBitmap(0, 0, pClone->GetWidth(), pClone->GetHeight(),
m_pDevice->GetBitmap(), rect.left, rect.top,
BlendMode::kNormal, nullptr, false);
left = std::min(left, 0);
top = std::min(top, 0);
if (bitmap->IsMaskFormat()) {
pClone->CompositeMask(0, 0, pClone->GetWidth(), pClone->GetHeight(),
bitmap, mask_argb, left, top, blend_mode, nullptr,
false);
} else {
pClone->CompositeBitmap(0, 0, pClone->GetWidth(), pClone->GetHeight(),
bitmap, left, top, blend_mode, nullptr, false);
}
} else {
pClone = bitmap;
}
if (m_pDevice->GetBackDrop()) {
m_pDevice->SetDIBits(pClone, rect.left, rect.top);
} else {
if (!bitmap->IsMaskFormat()) {
m_pDevice->SetDIBitsWithBlend(std::move(bitmap), rect.left, rect.top,
blend_mode);
}
}
return;
}
FX_RECT bbox = GetClippedBBox(
FX_RECT(left, top, left + bitmap->GetWidth(), top + bitmap->GetHeight()));
RetainPtr<CFX_DIBitmap> backdrop = GetBackdrop(
m_pCurObj, bbox, blend_mode != BlendMode::kNormal && bIsolated);
if (!backdrop) {
return;
}
const int width = bitmap->GetWidth();
const int height = bitmap->GetHeight();
if (bitmap->IsMaskFormat()) {
backdrop->CompositeMask(left - bbox.left, top - bbox.top, width, height,
std::move(bitmap), mask_argb, 0, 0, blend_mode,
nullptr, false);
} else {
backdrop->CompositeBitmap(left - bbox.left, top - bbox.top, width, height,
std::move(bitmap), 0, 0, blend_mode, nullptr,
false);
}
auto new_backdrop = pdfium::MakeRetain<CFX_DIBitmap>();
CHECK(new_backdrop->Create(backdrop->GetWidth(), backdrop->GetHeight(),
FXDIB_Format::kRgb32));
new_backdrop->Clear(0xffffffff);
new_backdrop->CompositeBitmap(0, 0, new_backdrop->GetWidth(),
new_backdrop->GetHeight(), std::move(backdrop),
0, 0, BlendMode::kNormal, nullptr, false);
m_pDevice->SetDIBits(std::move(new_backdrop), bbox.left, bbox.top);
}
RetainPtr<CFX_DIBitmap> CPDF_RenderStatus::LoadSMask(
CPDF_Dictionary* smask_dict,
const FX_RECT& clip_rect,
const CFX_Matrix& smask_matrix) {
RetainPtr<CPDF_Stream> pGroup =
smask_dict->GetMutableStreamFor(pdfium::transparency::kG);
if (!pGroup)
return nullptr;
std::unique_ptr<CPDF_Function> pFunc;
RetainPtr<const CPDF_Object> pFuncObj =
smask_dict->GetDirectObjectFor(pdfium::transparency::kTR);
if (pFuncObj && (pFuncObj->IsDictionary() || pFuncObj->IsStream()))
pFunc = CPDF_Function::Load(std::move(pFuncObj));
CFX_Matrix matrix = smask_matrix;
matrix.Translate(-clip_rect.left, -clip_rect.top);
CPDF_Form form(m_pContext->GetDocument(),
m_pContext->GetMutablePageResources(), pGroup);
form.ParseContent();
CFX_DefaultRenderDevice bitmap_device;
bool bLuminosity =
smask_dict->GetByteStringFor(pdfium::transparency::kSoftMaskSubType) !=
pdfium::transparency::kAlpha;
const int width = clip_rect.Width();
const int height = clip_rect.Height();
const FXDIB_Format format = GetFormatForLuminosity(bLuminosity);
if (!bitmap_device.Create(width, height, format)) {
return nullptr;
}
CPDF_ColorSpace::Family nCSFamily = CPDF_ColorSpace::Family::kUnknown;
const FX_ARGB background_color =
bLuminosity
? GetBackgroundColor(smask_dict, pGroup->GetDict().Get(), &nCSFamily)
: 0;
bitmap_device.Clear(background_color);
RetainPtr<const CPDF_Dictionary> pFormResource =
form.GetDict()->GetDictFor("Resources");
CPDF_RenderOptions options;
options.SetColorMode(bLuminosity ? CPDF_RenderOptions::kNormal
: CPDF_RenderOptions::kAlpha);
CPDF_RenderStatus status(m_pContext, &bitmap_device);
status.SetOptions(options);
status.SetGroupFamily(nCSFamily);
status.SetLoadMask(bLuminosity);
status.SetStdCS(true);
status.SetFormResource(std::move(pFormResource));
status.SetDropObjects(m_bDropObjects);
status.Initialize(nullptr, nullptr);
status.RenderObjectList(&form, matrix);
auto result_mask = pdfium::MakeRetain<CFX_DIBitmap>();
if (!result_mask->Create(width, height, FXDIB_Format::k8bppMask)) {
return nullptr;
}
pdfium::span<uint8_t> dest_buf = result_mask->GetWritableBuffer();
RetainPtr<const CFX_DIBitmap> bitmap = bitmap_device.GetBitmap();
pdfium::span<const uint8_t> src_buf = bitmap->GetBuffer();
const int dest_pitch = result_mask->GetPitch();
const int src_pitch = bitmap->GetPitch();
DataVector<uint8_t> transfers(256);
if (pFunc) {
std::vector<float> results(pFunc->OutputCount());
for (size_t i = 0; i < transfers.size(); ++i) {
float input = i / 255.0f;
pFunc->Call(pdfium::span_from_ref(input), results);
transfers[i] = FXSYS_roundf(results[0] * 255);
}
} else {
// Fill |transfers| with 0, 1, ... N.
std::iota(transfers.begin(), transfers.end(), 0);
}
if (bLuminosity) {
const int Bpp = bitmap->GetBPP() / 8;
for (int row = 0; row < height; row++) {
const size_t dest_offset = Fx2DSizeOrDie(row, dest_pitch);
const size_t src_offset = Fx2DSizeOrDie(row, src_pitch);
uint8_t* dest_pos = dest_buf.subspan(dest_offset).data();
const uint8_t* src_pos = src_buf.subspan(src_offset).data();
for (int col = 0; col < width; col++) {
UNSAFE_TODO({
*dest_pos++ = transfers[FXRGB2GRAY(src_pos[2], src_pos[1], *src_pos)];
src_pos += Bpp;
});
}
}
} else if (pFunc) {
int size = dest_pitch * height;
for (int i = 0; i < size; i++) {
dest_buf[i] = transfers[src_buf[i]];
}
} else {
fxcrt::Copy(src_buf.first(dest_pitch * height), dest_buf);
}
return result_mask;
}
FX_ARGB CPDF_RenderStatus::GetBackgroundColor(
const CPDF_Dictionary* pSMaskDict,
const CPDF_Dictionary* pGroupDict,
CPDF_ColorSpace::Family* pCSFamily) {
static constexpr FX_ARGB kDefaultColor = ArgbEncode(255, 0, 0, 0);
RetainPtr<const CPDF_Array> pBC =
pSMaskDict->GetArrayFor(pdfium::transparency::kBC);
if (!pBC)
return kDefaultColor;
RetainPtr<const CPDF_Object> pCSObj;
RetainPtr<const CPDF_Dictionary> pGroup =
pGroupDict ? pGroupDict->GetDictFor("Group") : nullptr;
if (pGroup)
pCSObj = pGroup->GetDirectObjectFor(pdfium::transparency::kCS);
RetainPtr<CPDF_ColorSpace> pCS =
CPDF_DocPageData::FromDocument(m_pContext->GetDocument())
->GetColorSpace(pCSObj.Get(), nullptr);
if (!pCS)
return kDefaultColor;
CPDF_ColorSpace::Family family = pCS->GetFamily();
if (family == CPDF_ColorSpace::Family::kLab || pCS->IsSpecial() ||
(family == CPDF_ColorSpace::Family::kICCBased && !pCS->IsNormal())) {
return kDefaultColor;
}
// Store Color Space Family to use in CPDF_RenderStatus::Initialize().
*pCSFamily = family;
uint32_t comps = std::max(8u, pCS->ComponentCount());
size_t count = std::min<size_t>(8, pBC->size());
std::vector<float> floats = ReadArrayElementsToVector(pBC.Get(), count);
floats.resize(comps);
auto rgb = pCS->GetRGBOrZerosOnError(floats);
return ArgbEncode(255, static_cast<int>(rgb.red * 255),
static_cast<int>(rgb.green * 255),
static_cast<int>(rgb.blue * 255));
}