1310 lines
44 KiB
C++
1310 lines
44 KiB
C++
// Copyright 2014 The PDFium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "public/fpdfview.h"
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#include <memory>
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#include <utility>
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#include <vector>
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#include "build/build_config.h"
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#include "core/fpdfapi/page/cpdf_docpagedata.h"
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#include "core/fpdfapi/page/cpdf_occontext.h"
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#include "core/fpdfapi/page/cpdf_page.h"
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#include "core/fpdfapi/page/cpdf_pageimagecache.h"
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#include "core/fpdfapi/page/cpdf_pagemodule.h"
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#include "core/fpdfapi/parser/cpdf_array.h"
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#include "core/fpdfapi/parser/cpdf_dictionary.h"
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#include "core/fpdfapi/parser/cpdf_document.h"
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#include "core/fpdfapi/parser/cpdf_name.h"
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#include "core/fpdfapi/parser/cpdf_parser.h"
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#include "core/fpdfapi/parser/cpdf_stream.h"
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#include "core/fpdfapi/parser/cpdf_string.h"
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#include "core/fpdfapi/parser/fpdf_parser_decode.h"
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#include "core/fpdfapi/render/cpdf_docrenderdata.h"
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#include "core/fpdfapi/render/cpdf_pagerendercontext.h"
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#include "core/fpdfapi/render/cpdf_rendercontext.h"
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#include "core/fpdfapi/render/cpdf_renderoptions.h"
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#include "core/fpdfdoc/cpdf_nametree.h"
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#include "core/fpdfdoc/cpdf_viewerpreferences.h"
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#include "core/fxcrt/cfx_read_only_span_stream.h"
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#include "core/fxcrt/fx_safe_types.h"
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#include "core/fxcrt/fx_stream.h"
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#include "core/fxcrt/fx_system.h"
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#include "core/fxcrt/span_util.h"
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#include "core/fxcrt/stl_util.h"
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#include "core/fxcrt/unowned_ptr.h"
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#include "core/fxge/cfx_defaultrenderdevice.h"
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#include "core/fxge/cfx_gemodule.h"
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#include "core/fxge/cfx_renderdevice.h"
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#include "fpdfsdk/cpdfsdk_customaccess.h"
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#include "fpdfsdk/cpdfsdk_formfillenvironment.h"
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#include "fpdfsdk/cpdfsdk_helpers.h"
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#include "fpdfsdk/cpdfsdk_pageview.h"
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#include "fpdfsdk/cpdfsdk_renderpage.h"
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#include "fxjs/ijs_runtime.h"
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#include "public/fpdf_formfill.h"
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#include "third_party/base/check_op.h"
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#include "third_party/base/numerics/safe_conversions.h"
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#include "third_party/base/ptr_util.h"
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#include "third_party/base/span.h"
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#if defined(_SKIA_SUPPORT_)
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#include "third_party/skia/include/core/SkPictureRecorder.h" // nogncheck
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#include "third_party/skia/include/core/SkRect.h" // nogncheck
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#endif // defined(_SKIA_SUPPORT_)
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#ifdef PDF_ENABLE_V8
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#include "fxjs/cfx_v8_array_buffer_allocator.h"
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#include "third_party/base/no_destructor.h"
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#endif
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#ifdef PDF_ENABLE_XFA
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#include "fpdfsdk/fpdfxfa/cpdfxfa_context.h"
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#include "fpdfsdk/fpdfxfa/cpdfxfa_page.h"
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#endif // PDF_ENABLE_XFA
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#if BUILDFLAG(IS_WIN)
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#include "core/fpdfapi/render/cpdf_progressiverenderer.h"
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#include "core/fpdfapi/render/cpdf_windowsrenderdevice.h"
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#include "public/fpdf_edit.h"
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// These checks are here because core/ and public/ cannot depend on each other.
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static_assert(static_cast<int>(WindowsPrintMode::kEmf) == FPDF_PRINTMODE_EMF,
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"WindowsPrintMode::kEmf value mismatch");
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static_assert(static_cast<int>(WindowsPrintMode::kTextOnly) ==
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FPDF_PRINTMODE_TEXTONLY,
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"WindowsPrintMode::kTextOnly value mismatch");
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static_assert(static_cast<int>(WindowsPrintMode::kPostScript2) ==
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FPDF_PRINTMODE_POSTSCRIPT2,
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"WindowsPrintMode::kPostScript2 value mismatch");
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static_assert(static_cast<int>(WindowsPrintMode::kPostScript3) ==
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FPDF_PRINTMODE_POSTSCRIPT3,
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"WindowsPrintMode::kPostScript3 value mismatch");
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static_assert(static_cast<int>(WindowsPrintMode::kPostScript2PassThrough) ==
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FPDF_PRINTMODE_POSTSCRIPT2_PASSTHROUGH,
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"WindowsPrintMode::kPostScript2PassThrough value mismatch");
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static_assert(static_cast<int>(WindowsPrintMode::kPostScript3PassThrough) ==
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FPDF_PRINTMODE_POSTSCRIPT3_PASSTHROUGH,
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"WindowsPrintMode::kPostScript3PassThrough value mismatch");
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static_assert(static_cast<int>(WindowsPrintMode::kEmfImageMasks) ==
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FPDF_PRINTMODE_EMF_IMAGE_MASKS,
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"WindowsPrintMode::kEmfImageMasks value mismatch");
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static_assert(static_cast<int>(WindowsPrintMode::kPostScript3Type42) ==
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FPDF_PRINTMODE_POSTSCRIPT3_TYPE42,
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"WindowsPrintMode::kPostScript3Type42 value mismatch");
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static_assert(
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static_cast<int>(WindowsPrintMode::kPostScript3Type42PassThrough) ==
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FPDF_PRINTMODE_POSTSCRIPT3_TYPE42_PASSTHROUGH,
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"WindowsPrintMode::kPostScript3Type42PassThrough value mismatch");
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#endif // BUILDFLAG(IS_WIN)
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#if defined(_SKIA_SUPPORT_)
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// These checks are here because core/ and public/ cannot depend on each other.
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static_assert(static_cast<int>(CFX_DefaultRenderDevice::RendererType::kAgg) ==
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FPDF_RENDERERTYPE_AGG,
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"CFX_DefaultRenderDevice::RendererType::kAGG value mismatch");
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static_assert(static_cast<int>(CFX_DefaultRenderDevice::RendererType::kSkia) ==
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FPDF_RENDERERTYPE_SKIA,
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"CFX_DefaultRenderDevice::RendererType::kSkia value mismatch");
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#endif // defined(_SKIA_SUPPORT_)
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namespace {
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bool g_bLibraryInitialized = false;
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void UseRendererType(FPDF_RENDERER_TYPE public_type) {
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// Internal definition of renderer types must stay updated with respect to
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// the public definition, such that all public definitions can be mapped to
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// an internal definition in `CFX_DefaultRenderDevice`. A public definition
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// value might not be meaningful for a particular build configuration, which
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// would mean use of that value is an error for that build.
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// AGG is always present in a build. |FPDF_RENDERERTYPE_SKIA| is valid to use
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// only if it is included in the build.
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#if defined(_SKIA_SUPPORT_)
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// This build configuration has the option for runtime renderer selection.
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if (public_type == FPDF_RENDERERTYPE_AGG ||
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public_type == FPDF_RENDERERTYPE_SKIA) {
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CFX_DefaultRenderDevice::SetDefaultRenderer(
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static_cast<CFX_DefaultRenderDevice::RendererType>(public_type));
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return;
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}
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CHECK(false);
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#else
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// `FPDF_RENDERERTYPE_AGG` is used for fully AGG builds.
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CHECK_EQ(public_type, FPDF_RENDERERTYPE_AGG);
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#endif
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}
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RetainPtr<const CPDF_Object> GetXFAEntryFromDocument(const CPDF_Document* doc) {
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const CPDF_Dictionary* root = doc->GetRoot();
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if (!root)
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return nullptr;
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RetainPtr<const CPDF_Dictionary> acro_form = root->GetDictFor("AcroForm");
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return acro_form ? acro_form->GetObjectFor("XFA") : nullptr;
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}
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struct XFAPacket {
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ByteString name;
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RetainPtr<const CPDF_Stream> data;
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};
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std::vector<XFAPacket> GetXFAPackets(RetainPtr<const CPDF_Object> xfa_object) {
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std::vector<XFAPacket> packets;
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if (!xfa_object)
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return packets;
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RetainPtr<const CPDF_Stream> xfa_stream = ToStream(xfa_object->GetDirect());
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if (xfa_stream) {
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packets.push_back({"", std::move(xfa_stream)});
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return packets;
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}
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RetainPtr<const CPDF_Array> xfa_array = ToArray(xfa_object->GetDirect());
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if (!xfa_array)
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return packets;
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packets.reserve(1 + (xfa_array->size() / 2));
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for (size_t i = 0; i < xfa_array->size(); i += 2) {
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if (i + 1 == xfa_array->size())
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break;
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RetainPtr<const CPDF_String> name = xfa_array->GetStringAt(i);
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if (!name)
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continue;
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RetainPtr<const CPDF_Stream> data = xfa_array->GetStreamAt(i + 1);
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if (!data)
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continue;
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packets.push_back({name->GetString(), std::move(data)});
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}
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return packets;
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}
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FPDF_DOCUMENT LoadDocumentImpl(RetainPtr<IFX_SeekableReadStream> pFileAccess,
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FPDF_BYTESTRING password) {
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if (!pFileAccess) {
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ProcessParseError(CPDF_Parser::FILE_ERROR);
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return nullptr;
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}
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auto pDocument =
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std::make_unique<CPDF_Document>(std::make_unique<CPDF_DocRenderData>(),
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std::make_unique<CPDF_DocPageData>());
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CPDF_Parser::Error error =
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pDocument->LoadDoc(std::move(pFileAccess), password);
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if (error != CPDF_Parser::SUCCESS) {
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ProcessParseError(error);
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return nullptr;
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}
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ReportUnsupportedFeatures(pDocument.get());
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return FPDFDocumentFromCPDFDocument(pDocument.release());
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}
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} // namespace
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FPDF_EXPORT void FPDF_CALLCONV FPDF_InitLibrary() {
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FPDF_InitLibraryWithConfig(nullptr);
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}
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FPDF_EXPORT void FPDF_CALLCONV
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FPDF_InitLibraryWithConfig(const FPDF_LIBRARY_CONFIG* config) {
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if (g_bLibraryInitialized)
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return;
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FX_InitializeMemoryAllocators();
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CFX_GEModule::Create(config ? config->m_pUserFontPaths : nullptr);
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CPDF_PageModule::Create();
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#ifdef PDF_ENABLE_XFA
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CPDFXFA_ModuleInit();
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#endif // PDF_ENABLE_XFA
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if (config && config->version >= 2) {
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void* platform = config->version >= 3 ? config->m_pPlatform : nullptr;
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IJS_Runtime::Initialize(config->m_v8EmbedderSlot, config->m_pIsolate,
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platform);
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if (config->version >= 4)
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UseRendererType(config->m_RendererType);
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}
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g_bLibraryInitialized = true;
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}
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FPDF_EXPORT void FPDF_CALLCONV FPDF_DestroyLibrary() {
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if (!g_bLibraryInitialized)
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return;
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#ifdef PDF_ENABLE_XFA
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CPDFXFA_ModuleDestroy();
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#endif // PDF_ENABLE_XFA
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CPDF_PageModule::Destroy();
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CFX_GEModule::Destroy();
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IJS_Runtime::Destroy();
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g_bLibraryInitialized = false;
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}
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FPDF_EXPORT void FPDF_CALLCONV FPDF_SetSandBoxPolicy(FPDF_DWORD policy,
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FPDF_BOOL enable) {
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return SetPDFSandboxPolicy(policy, enable);
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}
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#if BUILDFLAG(IS_WIN)
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FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_SetPrintMode(int mode) {
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if (mode < FPDF_PRINTMODE_EMF ||
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mode > FPDF_PRINTMODE_POSTSCRIPT3_TYPE42_PASSTHROUGH) {
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return FALSE;
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}
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g_pdfium_print_mode = static_cast<WindowsPrintMode>(mode);
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return TRUE;
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}
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#endif // BUILDFLAG(IS_WIN)
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FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
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FPDF_LoadDocument(FPDF_STRING file_path, FPDF_BYTESTRING password) {
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// NOTE: the creation of the file needs to be by the embedder on the
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// other side of this API.
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return LoadDocumentImpl(IFX_SeekableReadStream::CreateFromFilename(file_path),
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password);
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}
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FPDF_EXPORT int FPDF_CALLCONV FPDF_GetFormType(FPDF_DOCUMENT document) {
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const CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
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if (!pDoc)
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return FORMTYPE_NONE;
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const CPDF_Dictionary* pRoot = pDoc->GetRoot();
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if (!pRoot)
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return FORMTYPE_NONE;
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RetainPtr<const CPDF_Dictionary> pAcroForm = pRoot->GetDictFor("AcroForm");
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if (!pAcroForm)
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return FORMTYPE_NONE;
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RetainPtr<const CPDF_Object> pXFA = pAcroForm->GetObjectFor("XFA");
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if (!pXFA)
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return FORMTYPE_ACRO_FORM;
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bool bNeedsRendering = pRoot->GetBooleanFor("NeedsRendering", false);
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return bNeedsRendering ? FORMTYPE_XFA_FULL : FORMTYPE_XFA_FOREGROUND;
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}
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FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_LoadXFA(FPDF_DOCUMENT document) {
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#ifdef PDF_ENABLE_XFA
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auto* pDoc = CPDFDocumentFromFPDFDocument(document);
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if (!pDoc)
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return false;
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auto* pContext = static_cast<CPDFXFA_Context*>(pDoc->GetExtension());
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if (pContext)
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return pContext->LoadXFADoc();
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#endif // PDF_ENABLE_XFA
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return false;
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}
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FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
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FPDF_LoadMemDocument(const void* data_buf, int size, FPDF_BYTESTRING password) {
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return LoadDocumentImpl(
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pdfium::MakeRetain<CFX_ReadOnlySpanStream>(
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pdfium::make_span(static_cast<const uint8_t*>(data_buf), size)),
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password);
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}
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FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
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FPDF_LoadMemDocument64(const void* data_buf,
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size_t size,
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FPDF_BYTESTRING password) {
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return LoadDocumentImpl(
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pdfium::MakeRetain<CFX_ReadOnlySpanStream>(
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pdfium::make_span(static_cast<const uint8_t*>(data_buf), size)),
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password);
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}
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FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
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FPDF_LoadCustomDocument(FPDF_FILEACCESS* pFileAccess,
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FPDF_BYTESTRING password) {
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if (!pFileAccess)
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return nullptr;
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return LoadDocumentImpl(pdfium::MakeRetain<CPDFSDK_CustomAccess>(pFileAccess),
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password);
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}
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FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_GetFileVersion(FPDF_DOCUMENT doc,
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int* fileVersion) {
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if (!fileVersion)
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return false;
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*fileVersion = 0;
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CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(doc);
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if (!pDoc)
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return false;
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const CPDF_Parser* pParser = pDoc->GetParser();
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if (!pParser)
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return false;
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*fileVersion = pParser->GetFileVersion();
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return true;
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}
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FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
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FPDF_DocumentHasValidCrossReferenceTable(FPDF_DOCUMENT document) {
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CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
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return pDoc && pDoc->has_valid_cross_reference_table();
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}
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FPDF_EXPORT unsigned long FPDF_CALLCONV
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FPDF_GetDocPermissions(FPDF_DOCUMENT document) {
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CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
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return pDoc ? pDoc->GetUserPermissions() : 0;
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}
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FPDF_EXPORT int FPDF_CALLCONV
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FPDF_GetSecurityHandlerRevision(FPDF_DOCUMENT document) {
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CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
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if (!pDoc || !pDoc->GetParser())
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return -1;
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RetainPtr<const CPDF_Dictionary> pDict = pDoc->GetParser()->GetEncryptDict();
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return pDict ? pDict->GetIntegerFor("R") : -1;
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}
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FPDF_EXPORT int FPDF_CALLCONV FPDF_GetPageCount(FPDF_DOCUMENT document) {
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auto* pDoc = CPDFDocumentFromFPDFDocument(document);
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if (!pDoc)
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return 0;
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auto* pExtension = pDoc->GetExtension();
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return pExtension ? pExtension->GetPageCount() : pDoc->GetPageCount();
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}
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FPDF_EXPORT FPDF_PAGE FPDF_CALLCONV FPDF_LoadPage(FPDF_DOCUMENT document,
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int page_index) {
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auto* pDoc = CPDFDocumentFromFPDFDocument(document);
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if (!pDoc)
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return nullptr;
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if (page_index < 0 || page_index >= FPDF_GetPageCount(document))
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return nullptr;
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#ifdef PDF_ENABLE_XFA
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auto* pContext = static_cast<CPDFXFA_Context*>(pDoc->GetExtension());
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if (pContext) {
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return FPDFPageFromIPDFPage(
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pContext->GetOrCreateXFAPage(page_index).Leak());
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}
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#endif // PDF_ENABLE_XFA
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RetainPtr<CPDF_Dictionary> pDict = pDoc->GetMutablePageDictionary(page_index);
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if (!pDict)
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return nullptr;
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auto pPage = pdfium::MakeRetain<CPDF_Page>(pDoc, std::move(pDict));
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pPage->AddPageImageCache();
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pPage->ParseContent();
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return FPDFPageFromIPDFPage(pPage.Leak());
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}
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FPDF_EXPORT float FPDF_CALLCONV FPDF_GetPageWidthF(FPDF_PAGE page) {
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IPDF_Page* pPage = IPDFPageFromFPDFPage(page);
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return pPage ? pPage->GetPageWidth() : 0.0f;
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}
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FPDF_EXPORT double FPDF_CALLCONV FPDF_GetPageWidth(FPDF_PAGE page) {
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return FPDF_GetPageWidthF(page);
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}
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FPDF_EXPORT float FPDF_CALLCONV FPDF_GetPageHeightF(FPDF_PAGE page) {
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IPDF_Page* pPage = IPDFPageFromFPDFPage(page);
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return pPage ? pPage->GetPageHeight() : 0.0f;
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}
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FPDF_EXPORT double FPDF_CALLCONV FPDF_GetPageHeight(FPDF_PAGE page) {
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return FPDF_GetPageHeightF(page);
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}
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FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_GetPageBoundingBox(FPDF_PAGE page,
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FS_RECTF* rect) {
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if (!rect)
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return false;
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CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
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if (!pPage)
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return false;
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*rect = FSRectFFromCFXFloatRect(pPage->GetBBox());
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return true;
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}
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#if BUILDFLAG(IS_WIN)
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namespace {
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constexpr float kEpsilonSize = 0.01f;
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bool IsPageTooSmall(const CPDF_Page* page) {
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const CFX_SizeF& page_size = page->GetPageSize();
|
|
return page_size.width < kEpsilonSize || page_size.height < kEpsilonSize;
|
|
}
|
|
|
|
bool IsScalingTooSmall(const CFX_Matrix& matrix) {
|
|
float horizontal;
|
|
float vertical;
|
|
if (matrix.a == 0.0f && matrix.d == 0.0f) {
|
|
horizontal = matrix.b;
|
|
vertical = matrix.c;
|
|
} else {
|
|
horizontal = matrix.a;
|
|
vertical = matrix.d;
|
|
}
|
|
return fabsf(horizontal) < kEpsilonSize || fabsf(vertical) < kEpsilonSize;
|
|
}
|
|
|
|
// Get a bitmap of just the mask section defined by |mask_box| from a full page
|
|
// bitmap |pBitmap|.
|
|
RetainPtr<CFX_DIBitmap> GetMaskBitmap(CPDF_Page* pPage,
|
|
int start_x,
|
|
int start_y,
|
|
int size_x,
|
|
int size_y,
|
|
int rotate,
|
|
const RetainPtr<CFX_DIBitmap>& pSrc,
|
|
const CFX_FloatRect& mask_box,
|
|
FX_RECT* bitmap_area) {
|
|
if (IsPageTooSmall(pPage))
|
|
return nullptr;
|
|
|
|
FX_RECT page_rect(start_x, start_y, start_x + size_x, start_y + size_y);
|
|
CFX_Matrix matrix = pPage->GetDisplayMatrix(page_rect, rotate);
|
|
if (IsScalingTooSmall(matrix))
|
|
return nullptr;
|
|
|
|
*bitmap_area = matrix.TransformRect(mask_box).GetOuterRect();
|
|
if (bitmap_area->IsEmpty())
|
|
return nullptr;
|
|
|
|
// Create a new bitmap to transfer part of the page bitmap to.
|
|
RetainPtr<CFX_DIBitmap> pDst = pdfium::MakeRetain<CFX_DIBitmap>();
|
|
if (!pDst->Create(bitmap_area->Width(), bitmap_area->Height(),
|
|
FXDIB_Format::kArgb)) {
|
|
return nullptr;
|
|
}
|
|
pDst->Clear(0x00ffffff);
|
|
pDst->TransferBitmap(0, 0, bitmap_area->Width(), bitmap_area->Height(), pSrc,
|
|
bitmap_area->left, bitmap_area->top);
|
|
return pDst;
|
|
}
|
|
|
|
void RenderBitmap(CFX_RenderDevice* device,
|
|
const RetainPtr<CFX_DIBitmap>& pSrc,
|
|
const FX_RECT& mask_area) {
|
|
int size_x_bm = mask_area.Width();
|
|
int size_y_bm = mask_area.Height();
|
|
if (size_x_bm == 0 || size_y_bm == 0)
|
|
return;
|
|
|
|
// Create a new bitmap from the old one
|
|
RetainPtr<CFX_DIBitmap> pDst = pdfium::MakeRetain<CFX_DIBitmap>();
|
|
if (!pDst->Create(size_x_bm, size_y_bm, FXDIB_Format::kRgb32))
|
|
return;
|
|
|
|
pDst->Clear(0xffffffff);
|
|
pDst->CompositeBitmap(0, 0, size_x_bm, size_y_bm, pSrc, 0, 0,
|
|
BlendMode::kNormal, nullptr, false);
|
|
|
|
if (device->GetDeviceType() == DeviceType::kPrinter) {
|
|
device->StretchDIBits(pDst, mask_area.left, mask_area.top, size_x_bm,
|
|
size_y_bm);
|
|
} else {
|
|
device->SetDIBits(pDst, mask_area.left, mask_area.top);
|
|
}
|
|
}
|
|
|
|
} // namespace
|
|
|
|
FPDF_EXPORT void FPDF_CALLCONV FPDF_RenderPage(HDC dc,
|
|
FPDF_PAGE page,
|
|
int start_x,
|
|
int start_y,
|
|
int size_x,
|
|
int size_y,
|
|
int rotate,
|
|
int flags) {
|
|
CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
|
|
if (!pPage)
|
|
return;
|
|
|
|
auto pOwnedContext = std::make_unique<CPDF_PageRenderContext>();
|
|
CPDF_PageRenderContext* pContext = pOwnedContext.get();
|
|
CPDF_Page::RenderContextClearer clearer(pPage);
|
|
pPage->SetRenderContext(std::move(pOwnedContext));
|
|
|
|
// Don't render the full page to bitmap for a mask unless there are a lot
|
|
// of masks. Full page bitmaps result in large spool sizes, so they should
|
|
// only be used when necessary. For large numbers of masks, rendering each
|
|
// individually is inefficient and unlikely to significantly improve spool
|
|
// size.
|
|
const bool bEnableImageMasks =
|
|
g_pdfium_print_mode == WindowsPrintMode::kEmfImageMasks;
|
|
const bool bNewBitmap = pPage->BackgroundAlphaNeeded() ||
|
|
(pPage->HasImageMask() && !bEnableImageMasks) ||
|
|
pPage->GetMaskBoundingBoxes().size() > 100;
|
|
const bool bHasMask = pPage->HasImageMask() && !bNewBitmap;
|
|
auto* render_data = CPDF_DocRenderData::FromDocument(pPage->GetDocument());
|
|
if (!bNewBitmap && !bHasMask) {
|
|
pContext->m_pDevice = std::make_unique<CPDF_WindowsRenderDevice>(
|
|
dc, render_data->GetPSFontTracker());
|
|
CPDFSDK_RenderPageWithContext(pContext, pPage, start_x, start_y, size_x,
|
|
size_y, rotate, flags,
|
|
/*color_scheme=*/nullptr,
|
|
/*need_to_restore=*/true, /*pause=*/nullptr);
|
|
return;
|
|
}
|
|
|
|
RetainPtr<CFX_DIBitmap> pBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
|
|
// Create will probably work fine even if it fails here: we will just attach
|
|
// a zero-sized bitmap to |pDevice|.
|
|
pBitmap->Create(size_x, size_y, FXDIB_Format::kArgb);
|
|
pBitmap->Clear(0x00ffffff);
|
|
CFX_DefaultRenderDevice* pDevice = new CFX_DefaultRenderDevice;
|
|
pContext->m_pDevice = pdfium::WrapUnique(pDevice);
|
|
pDevice->Attach(pBitmap);
|
|
if (bHasMask) {
|
|
pContext->m_pOptions = std::make_unique<CPDF_RenderOptions>();
|
|
pContext->m_pOptions->GetOptions().bBreakForMasks = true;
|
|
}
|
|
|
|
CPDFSDK_RenderPageWithContext(pContext, pPage, start_x, start_y, size_x,
|
|
size_y, rotate, flags, /*color_scheme=*/nullptr,
|
|
/*need_to_restore=*/true,
|
|
/*pause=*/nullptr);
|
|
|
|
if (!bHasMask) {
|
|
CPDF_WindowsRenderDevice win_dc(dc, render_data->GetPSFontTracker());
|
|
bool bitsStretched = false;
|
|
if (win_dc.GetDeviceType() == DeviceType::kPrinter) {
|
|
auto pDst = pdfium::MakeRetain<CFX_DIBitmap>();
|
|
if (pDst->Create(size_x, size_y, FXDIB_Format::kRgb32)) {
|
|
fxcrt::spanset(pDst->GetBuffer().first(pBitmap->GetPitch() * size_y),
|
|
-1);
|
|
pDst->CompositeBitmap(0, 0, size_x, size_y, pBitmap, 0, 0,
|
|
BlendMode::kNormal, nullptr, false);
|
|
win_dc.StretchDIBits(pDst, 0, 0, size_x, size_y);
|
|
bitsStretched = true;
|
|
}
|
|
}
|
|
if (!bitsStretched)
|
|
win_dc.SetDIBits(pBitmap, 0, 0);
|
|
return;
|
|
}
|
|
|
|
// Finish rendering the page to bitmap and copy the correct segments
|
|
// of the page to individual image mask bitmaps.
|
|
const std::vector<CFX_FloatRect>& mask_boxes = pPage->GetMaskBoundingBoxes();
|
|
std::vector<FX_RECT> bitmap_areas(mask_boxes.size());
|
|
std::vector<RetainPtr<CFX_DIBitmap>> bitmaps(mask_boxes.size());
|
|
for (size_t i = 0; i < mask_boxes.size(); i++) {
|
|
bitmaps[i] = GetMaskBitmap(pPage, start_x, start_y, size_x, size_y, rotate,
|
|
pBitmap, mask_boxes[i], &bitmap_areas[i]);
|
|
pContext->m_pRenderer->Continue(nullptr);
|
|
}
|
|
|
|
// Begin rendering to the printer. Add flag to indicate the renderer should
|
|
// pause after each image mask.
|
|
pPage->ClearRenderContext();
|
|
pOwnedContext = std::make_unique<CPDF_PageRenderContext>();
|
|
pContext = pOwnedContext.get();
|
|
pPage->SetRenderContext(std::move(pOwnedContext));
|
|
pContext->m_pDevice = std::make_unique<CPDF_WindowsRenderDevice>(
|
|
dc, render_data->GetPSFontTracker());
|
|
pContext->m_pOptions = std::make_unique<CPDF_RenderOptions>();
|
|
pContext->m_pOptions->GetOptions().bBreakForMasks = true;
|
|
|
|
CPDFSDK_RenderPageWithContext(pContext, pPage, start_x, start_y, size_x,
|
|
size_y, rotate, flags, /*color_scheme=*/nullptr,
|
|
/*need_to_restore=*/true,
|
|
/*pause=*/nullptr);
|
|
|
|
// Render masks
|
|
for (size_t i = 0; i < mask_boxes.size(); i++) {
|
|
// Render the bitmap for the mask and free the bitmap.
|
|
if (bitmaps[i]) { // will be null if mask has zero area
|
|
RenderBitmap(pContext->m_pDevice.get(), bitmaps[i], bitmap_areas[i]);
|
|
}
|
|
// Render the next portion of page.
|
|
pContext->m_pRenderer->Continue(nullptr);
|
|
}
|
|
}
|
|
#endif // BUILDFLAG(IS_WIN)
|
|
|
|
FPDF_EXPORT void FPDF_CALLCONV FPDF_RenderPageBitmap(FPDF_BITMAP bitmap,
|
|
FPDF_PAGE page,
|
|
int start_x,
|
|
int start_y,
|
|
int size_x,
|
|
int size_y,
|
|
int rotate,
|
|
int flags) {
|
|
if (!bitmap)
|
|
return;
|
|
|
|
CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
|
|
if (!pPage)
|
|
return;
|
|
|
|
auto pOwnedContext = std::make_unique<CPDF_PageRenderContext>();
|
|
CPDF_PageRenderContext* pContext = pOwnedContext.get();
|
|
CPDF_Page::RenderContextClearer clearer(pPage);
|
|
pPage->SetRenderContext(std::move(pOwnedContext));
|
|
|
|
auto pOwnedDevice = std::make_unique<CFX_DefaultRenderDevice>();
|
|
CFX_DefaultRenderDevice* pDevice = pOwnedDevice.get();
|
|
pContext->m_pDevice = std::move(pOwnedDevice);
|
|
|
|
RetainPtr<CFX_DIBitmap> pBitmap(CFXDIBitmapFromFPDFBitmap(bitmap));
|
|
pDevice->AttachWithRgbByteOrder(pBitmap, !!(flags & FPDF_REVERSE_BYTE_ORDER));
|
|
CPDFSDK_RenderPageWithContext(pContext, pPage, start_x, start_y, size_x,
|
|
size_y, rotate, flags, /*color_scheme=*/nullptr,
|
|
/*need_to_restore=*/true,
|
|
/*pause=*/nullptr);
|
|
|
|
#if defined(_SKIA_SUPPORT_)
|
|
if (CFX_DefaultRenderDevice::SkiaIsDefaultRenderer()) {
|
|
pBitmap->UnPreMultiply();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
FPDF_EXPORT void FPDF_CALLCONV
|
|
FPDF_RenderPageBitmapWithMatrix(FPDF_BITMAP bitmap,
|
|
FPDF_PAGE page,
|
|
const FS_MATRIX* matrix,
|
|
const FS_RECTF* clipping,
|
|
int flags) {
|
|
if (!bitmap)
|
|
return;
|
|
|
|
CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
|
|
if (!pPage)
|
|
return;
|
|
|
|
auto pOwnedContext = std::make_unique<CPDF_PageRenderContext>();
|
|
CPDF_PageRenderContext* pContext = pOwnedContext.get();
|
|
CPDF_Page::RenderContextClearer clearer(pPage);
|
|
pPage->SetRenderContext(std::move(pOwnedContext));
|
|
|
|
auto pOwnedDevice = std::make_unique<CFX_DefaultRenderDevice>();
|
|
CFX_DefaultRenderDevice* pDevice = pOwnedDevice.get();
|
|
pContext->m_pDevice = std::move(pOwnedDevice);
|
|
|
|
RetainPtr<CFX_DIBitmap> pBitmap(CFXDIBitmapFromFPDFBitmap(bitmap));
|
|
pDevice->AttachWithRgbByteOrder(std::move(pBitmap),
|
|
!!(flags & FPDF_REVERSE_BYTE_ORDER));
|
|
|
|
CFX_FloatRect clipping_rect;
|
|
if (clipping)
|
|
clipping_rect = CFXFloatRectFromFSRectF(*clipping);
|
|
FX_RECT clip_rect = clipping_rect.ToFxRect();
|
|
|
|
const FX_RECT rect(0, 0, pPage->GetPageWidth(), pPage->GetPageHeight());
|
|
CFX_Matrix transform_matrix = pPage->GetDisplayMatrix(rect, 0);
|
|
if (matrix)
|
|
transform_matrix *= CFXMatrixFromFSMatrix(*matrix);
|
|
CPDFSDK_RenderPage(pContext, pPage, transform_matrix, clip_rect, flags,
|
|
/*color_scheme=*/nullptr);
|
|
}
|
|
|
|
#if defined(_SKIA_SUPPORT_)
|
|
FPDF_EXPORT FPDF_RECORDER FPDF_CALLCONV FPDF_RenderPageSkp(FPDF_PAGE page,
|
|
int size_x,
|
|
int size_y) {
|
|
auto skDevice = std::make_unique<CFX_DefaultRenderDevice>();
|
|
std::unique_ptr<SkPictureRecorder> recorder =
|
|
skDevice->CreateRecorder(SkRect::MakeWH(size_x, size_y));
|
|
|
|
CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
|
|
if (!pPage) {
|
|
// The equivalent bitmap APIs don't signal failure in this case, but defer
|
|
// the real work to a later call to `FPDF_FFLDraw()`. This is the case for
|
|
// XFA pages, for example.
|
|
//
|
|
// The caller still needs the `SkPictureRecorder` in order to call
|
|
// `FPDF_FFLRecord()` later.
|
|
return recorder.release();
|
|
}
|
|
|
|
auto pOwnedContext = std::make_unique<CPDF_PageRenderContext>();
|
|
pOwnedContext->m_pDevice = std::move(skDevice);
|
|
|
|
CPDF_Page::RenderContextClearer clearer(pPage);
|
|
CPDF_PageRenderContext* pContext = pOwnedContext.get();
|
|
pPage->SetRenderContext(std::move(pOwnedContext));
|
|
|
|
CPDFSDK_RenderPageWithContext(pContext, pPage, 0, 0, size_x, size_y, 0, 0,
|
|
/*color_scheme=*/nullptr,
|
|
/*need_to_restore=*/true, /*pause=*/nullptr);
|
|
|
|
return recorder.release();
|
|
}
|
|
#endif // defined(_SKIA_SUPPORT_)
|
|
|
|
FPDF_EXPORT void FPDF_CALLCONV FPDF_ClosePage(FPDF_PAGE page) {
|
|
if (!page)
|
|
return;
|
|
|
|
// Take it back across the API and hold for duration of this function.
|
|
RetainPtr<IPDF_Page> pPage;
|
|
pPage.Unleak(IPDFPageFromFPDFPage(page));
|
|
|
|
if (pPage->AsXFAPage())
|
|
return;
|
|
|
|
// This will delete the PageView object corresponding to |pPage|. We must
|
|
// cleanup the PageView before releasing the reference on |pPage| as it will
|
|
// attempt to reset the PageView during destruction.
|
|
pPage->AsPDFPage()->ClearView();
|
|
}
|
|
|
|
FPDF_EXPORT void FPDF_CALLCONV FPDF_CloseDocument(FPDF_DOCUMENT document) {
|
|
// Take it back across the API and throw it away,
|
|
std::unique_ptr<CPDF_Document>(CPDFDocumentFromFPDFDocument(document));
|
|
}
|
|
|
|
FPDF_EXPORT unsigned long FPDF_CALLCONV FPDF_GetLastError() {
|
|
return FXSYS_GetLastError();
|
|
}
|
|
|
|
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_DeviceToPage(FPDF_PAGE page,
|
|
int start_x,
|
|
int start_y,
|
|
int size_x,
|
|
int size_y,
|
|
int rotate,
|
|
int device_x,
|
|
int device_y,
|
|
double* page_x,
|
|
double* page_y) {
|
|
if (!page || !page_x || !page_y)
|
|
return false;
|
|
|
|
IPDF_Page* pPage = IPDFPageFromFPDFPage(page);
|
|
const FX_RECT rect(start_x, start_y, start_x + size_x, start_y + size_y);
|
|
absl::optional<CFX_PointF> pos =
|
|
pPage->DeviceToPage(rect, rotate, CFX_PointF(device_x, device_y));
|
|
if (!pos.has_value())
|
|
return false;
|
|
|
|
*page_x = pos->x;
|
|
*page_y = pos->y;
|
|
return true;
|
|
}
|
|
|
|
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_PageToDevice(FPDF_PAGE page,
|
|
int start_x,
|
|
int start_y,
|
|
int size_x,
|
|
int size_y,
|
|
int rotate,
|
|
double page_x,
|
|
double page_y,
|
|
int* device_x,
|
|
int* device_y) {
|
|
if (!page || !device_x || !device_y)
|
|
return false;
|
|
|
|
IPDF_Page* pPage = IPDFPageFromFPDFPage(page);
|
|
const FX_RECT rect(start_x, start_y, start_x + size_x, start_y + size_y);
|
|
CFX_PointF page_point(static_cast<float>(page_x), static_cast<float>(page_y));
|
|
absl::optional<CFX_PointF> pos =
|
|
pPage->PageToDevice(rect, rotate, page_point);
|
|
if (!pos.has_value())
|
|
return false;
|
|
|
|
*device_x = FXSYS_roundf(pos->x);
|
|
*device_y = FXSYS_roundf(pos->y);
|
|
return true;
|
|
}
|
|
|
|
FPDF_EXPORT FPDF_BITMAP FPDF_CALLCONV FPDFBitmap_Create(int width,
|
|
int height,
|
|
int alpha) {
|
|
auto pBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
|
|
if (!pBitmap->Create(width, height,
|
|
alpha ? FXDIB_Format::kArgb : FXDIB_Format::kRgb32)) {
|
|
return nullptr;
|
|
}
|
|
return FPDFBitmapFromCFXDIBitmap(pBitmap.Leak());
|
|
}
|
|
|
|
FPDF_EXPORT FPDF_BITMAP FPDF_CALLCONV FPDFBitmap_CreateEx(int width,
|
|
int height,
|
|
int format,
|
|
void* first_scan,
|
|
int stride) {
|
|
FXDIB_Format fx_format;
|
|
switch (format) {
|
|
case FPDFBitmap_Gray:
|
|
fx_format = FXDIB_Format::k8bppRgb;
|
|
break;
|
|
case FPDFBitmap_BGR:
|
|
fx_format = FXDIB_Format::kRgb;
|
|
break;
|
|
case FPDFBitmap_BGRx:
|
|
fx_format = FXDIB_Format::kRgb32;
|
|
break;
|
|
case FPDFBitmap_BGRA:
|
|
fx_format = FXDIB_Format::kArgb;
|
|
break;
|
|
default:
|
|
return nullptr;
|
|
}
|
|
|
|
// Ensure external memory is good at least for the duration of this call.
|
|
UnownedPtr<uint8_t> pChecker(static_cast<uint8_t*>(first_scan));
|
|
auto pBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
|
|
if (!pBitmap->Create(width, height, fx_format, pChecker, stride))
|
|
return nullptr;
|
|
|
|
return FPDFBitmapFromCFXDIBitmap(pBitmap.Leak());
|
|
}
|
|
|
|
FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetFormat(FPDF_BITMAP bitmap) {
|
|
if (!bitmap)
|
|
return FPDFBitmap_Unknown;
|
|
|
|
FXDIB_Format format = CFXDIBitmapFromFPDFBitmap(bitmap)->GetFormat();
|
|
switch (format) {
|
|
case FXDIB_Format::k8bppRgb:
|
|
case FXDIB_Format::k8bppMask:
|
|
return FPDFBitmap_Gray;
|
|
case FXDIB_Format::kRgb:
|
|
return FPDFBitmap_BGR;
|
|
case FXDIB_Format::kRgb32:
|
|
return FPDFBitmap_BGRx;
|
|
case FXDIB_Format::kArgb:
|
|
return FPDFBitmap_BGRA;
|
|
default:
|
|
return FPDFBitmap_Unknown;
|
|
}
|
|
}
|
|
|
|
FPDF_EXPORT void FPDF_CALLCONV FPDFBitmap_FillRect(FPDF_BITMAP bitmap,
|
|
int left,
|
|
int top,
|
|
int width,
|
|
int height,
|
|
FPDF_DWORD color) {
|
|
if (!bitmap)
|
|
return;
|
|
|
|
CFX_DefaultRenderDevice device;
|
|
RetainPtr<CFX_DIBitmap> pBitmap(CFXDIBitmapFromFPDFBitmap(bitmap));
|
|
device.Attach(pBitmap);
|
|
if (!pBitmap->IsAlphaFormat())
|
|
color |= 0xFF000000;
|
|
device.FillRect(FX_RECT(left, top, left + width, top + height),
|
|
static_cast<uint32_t>(color));
|
|
}
|
|
|
|
FPDF_EXPORT void* FPDF_CALLCONV FPDFBitmap_GetBuffer(FPDF_BITMAP bitmap) {
|
|
return bitmap ? CFXDIBitmapFromFPDFBitmap(bitmap)->GetBuffer().data()
|
|
: nullptr;
|
|
}
|
|
|
|
FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetWidth(FPDF_BITMAP bitmap) {
|
|
return bitmap ? CFXDIBitmapFromFPDFBitmap(bitmap)->GetWidth() : 0;
|
|
}
|
|
|
|
FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetHeight(FPDF_BITMAP bitmap) {
|
|
return bitmap ? CFXDIBitmapFromFPDFBitmap(bitmap)->GetHeight() : 0;
|
|
}
|
|
|
|
FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetStride(FPDF_BITMAP bitmap) {
|
|
return bitmap ? CFXDIBitmapFromFPDFBitmap(bitmap)->GetPitch() : 0;
|
|
}
|
|
|
|
FPDF_EXPORT void FPDF_CALLCONV FPDFBitmap_Destroy(FPDF_BITMAP bitmap) {
|
|
RetainPtr<CFX_DIBitmap> destroyer;
|
|
destroyer.Unleak(CFXDIBitmapFromFPDFBitmap(bitmap));
|
|
}
|
|
|
|
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
|
|
FPDF_GetPageSizeByIndexF(FPDF_DOCUMENT document,
|
|
int page_index,
|
|
FS_SIZEF* size) {
|
|
if (!size)
|
|
return false;
|
|
|
|
auto* pDoc = CPDFDocumentFromFPDFDocument(document);
|
|
if (!pDoc)
|
|
return false;
|
|
|
|
#ifdef PDF_ENABLE_XFA
|
|
if (page_index < 0 || page_index >= FPDF_GetPageCount(document))
|
|
return false;
|
|
|
|
auto* pContext = static_cast<CPDFXFA_Context*>(pDoc->GetExtension());
|
|
if (pContext) {
|
|
RetainPtr<CPDFXFA_Page> pPage = pContext->GetOrCreateXFAPage(page_index);
|
|
if (!pPage)
|
|
return false;
|
|
|
|
size->width = pPage->GetPageWidth();
|
|
size->height = pPage->GetPageHeight();
|
|
return true;
|
|
}
|
|
#endif // PDF_ENABLE_XFA
|
|
|
|
RetainPtr<CPDF_Dictionary> pDict = pDoc->GetMutablePageDictionary(page_index);
|
|
if (!pDict)
|
|
return false;
|
|
|
|
auto page = pdfium::MakeRetain<CPDF_Page>(pDoc, std::move(pDict));
|
|
page->AddPageImageCache();
|
|
size->width = page->GetPageWidth();
|
|
size->height = page->GetPageHeight();
|
|
return true;
|
|
}
|
|
|
|
FPDF_EXPORT int FPDF_CALLCONV FPDF_GetPageSizeByIndex(FPDF_DOCUMENT document,
|
|
int page_index,
|
|
double* width,
|
|
double* height) {
|
|
if (!width || !height)
|
|
return false;
|
|
|
|
FS_SIZEF size;
|
|
if (!FPDF_GetPageSizeByIndexF(document, page_index, &size))
|
|
return false;
|
|
|
|
*width = size.width;
|
|
*height = size.height;
|
|
return true;
|
|
}
|
|
|
|
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
|
|
FPDF_VIEWERREF_GetPrintScaling(FPDF_DOCUMENT document) {
|
|
const CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
|
|
if (!pDoc)
|
|
return true;
|
|
CPDF_ViewerPreferences viewRef(pDoc);
|
|
return viewRef.PrintScaling();
|
|
}
|
|
|
|
FPDF_EXPORT int FPDF_CALLCONV
|
|
FPDF_VIEWERREF_GetNumCopies(FPDF_DOCUMENT document) {
|
|
const CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
|
|
if (!pDoc)
|
|
return 1;
|
|
CPDF_ViewerPreferences viewRef(pDoc);
|
|
return viewRef.NumCopies();
|
|
}
|
|
|
|
FPDF_EXPORT FPDF_PAGERANGE FPDF_CALLCONV
|
|
FPDF_VIEWERREF_GetPrintPageRange(FPDF_DOCUMENT document) {
|
|
const CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
|
|
if (!pDoc)
|
|
return nullptr;
|
|
CPDF_ViewerPreferences viewRef(pDoc);
|
|
|
|
// Unretained reference in public API. NOLINTNEXTLINE
|
|
return FPDFPageRangeFromCPDFArray(viewRef.PrintPageRange());
|
|
}
|
|
|
|
FPDF_EXPORT size_t FPDF_CALLCONV
|
|
FPDF_VIEWERREF_GetPrintPageRangeCount(FPDF_PAGERANGE pagerange) {
|
|
const CPDF_Array* pArray = CPDFArrayFromFPDFPageRange(pagerange);
|
|
return pArray ? pArray->size() : 0;
|
|
}
|
|
|
|
FPDF_EXPORT int FPDF_CALLCONV
|
|
FPDF_VIEWERREF_GetPrintPageRangeElement(FPDF_PAGERANGE pagerange,
|
|
size_t index) {
|
|
const CPDF_Array* pArray = CPDFArrayFromFPDFPageRange(pagerange);
|
|
if (!pArray || index >= pArray->size())
|
|
return -1;
|
|
return pArray->GetIntegerAt(index);
|
|
}
|
|
|
|
FPDF_EXPORT FPDF_DUPLEXTYPE FPDF_CALLCONV
|
|
FPDF_VIEWERREF_GetDuplex(FPDF_DOCUMENT document) {
|
|
const CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
|
|
if (!pDoc)
|
|
return DuplexUndefined;
|
|
CPDF_ViewerPreferences viewRef(pDoc);
|
|
ByteString duplex = viewRef.Duplex();
|
|
if ("Simplex" == duplex)
|
|
return Simplex;
|
|
if ("DuplexFlipShortEdge" == duplex)
|
|
return DuplexFlipShortEdge;
|
|
if ("DuplexFlipLongEdge" == duplex)
|
|
return DuplexFlipLongEdge;
|
|
return DuplexUndefined;
|
|
}
|
|
|
|
FPDF_EXPORT unsigned long FPDF_CALLCONV
|
|
FPDF_VIEWERREF_GetName(FPDF_DOCUMENT document,
|
|
FPDF_BYTESTRING key,
|
|
char* buffer,
|
|
unsigned long length) {
|
|
const CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
|
|
if (!pDoc)
|
|
return 0;
|
|
|
|
CPDF_ViewerPreferences viewRef(pDoc);
|
|
absl::optional<ByteString> bsVal = viewRef.GenericName(key);
|
|
if (!bsVal.has_value())
|
|
return 0;
|
|
|
|
return NulTerminateMaybeCopyAndReturnLength(bsVal.value(), buffer, length);
|
|
}
|
|
|
|
FPDF_EXPORT FPDF_DWORD FPDF_CALLCONV
|
|
FPDF_CountNamedDests(FPDF_DOCUMENT document) {
|
|
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
|
|
if (!pDoc)
|
|
return 0;
|
|
|
|
const CPDF_Dictionary* pRoot = pDoc->GetRoot();
|
|
if (!pRoot)
|
|
return 0;
|
|
|
|
auto name_tree = CPDF_NameTree::Create(pDoc, "Dests");
|
|
FX_SAFE_UINT32 count = name_tree ? name_tree->GetCount() : 0;
|
|
RetainPtr<const CPDF_Dictionary> pOldStyleDests = pRoot->GetDictFor("Dests");
|
|
if (pOldStyleDests)
|
|
count += pOldStyleDests->size();
|
|
return count.ValueOrDefault(0);
|
|
}
|
|
|
|
FPDF_EXPORT FPDF_DEST FPDF_CALLCONV
|
|
FPDF_GetNamedDestByName(FPDF_DOCUMENT document, FPDF_BYTESTRING name) {
|
|
if (!name || name[0] == 0)
|
|
return nullptr;
|
|
|
|
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
|
|
if (!pDoc)
|
|
return nullptr;
|
|
|
|
ByteString dest_name(name);
|
|
|
|
// TODO(tsepez): murky ownership, should caller get a reference?
|
|
// Unretained reference in public API. NOLINTNEXTLINE
|
|
return FPDFDestFromCPDFArray(CPDF_NameTree::LookupNamedDest(pDoc, dest_name));
|
|
}
|
|
|
|
#ifdef PDF_ENABLE_V8
|
|
FPDF_EXPORT const char* FPDF_CALLCONV FPDF_GetRecommendedV8Flags() {
|
|
// Use interpreted JS only to avoid RWX pages in our address space. Also,
|
|
// --jitless implies --no-expose-wasm, which reduce exposure since no PDF
|
|
// should contain web assembly.
|
|
return "--jitless";
|
|
}
|
|
|
|
FPDF_EXPORT void* FPDF_CALLCONV FPDF_GetArrayBufferAllocatorSharedInstance() {
|
|
static pdfium::base::NoDestructor<CFX_V8ArrayBufferAllocator> allocator;
|
|
return allocator.get();
|
|
}
|
|
#endif // PDF_ENABLE_V8
|
|
|
|
#ifdef PDF_ENABLE_XFA
|
|
FPDF_EXPORT FPDF_RESULT FPDF_CALLCONV FPDF_BStr_Init(FPDF_BSTR* bstr) {
|
|
if (!bstr)
|
|
return -1;
|
|
|
|
bstr->str = nullptr;
|
|
bstr->len = 0;
|
|
return 0;
|
|
}
|
|
|
|
FPDF_EXPORT FPDF_RESULT FPDF_CALLCONV FPDF_BStr_Set(FPDF_BSTR* bstr,
|
|
const char* cstr,
|
|
int length) {
|
|
if (!bstr || !cstr)
|
|
return -1;
|
|
|
|
if (length == -1)
|
|
length = pdfium::base::checked_cast<int>(strlen(cstr));
|
|
|
|
if (length == 0) {
|
|
FPDF_BStr_Clear(bstr);
|
|
return 0;
|
|
}
|
|
|
|
if (bstr->str && bstr->len < length)
|
|
bstr->str = FX_Realloc(char, bstr->str, length + 1);
|
|
else if (!bstr->str)
|
|
bstr->str = FX_Alloc(char, length + 1);
|
|
|
|
bstr->str[length] = 0;
|
|
memcpy(bstr->str, cstr, length);
|
|
bstr->len = length;
|
|
return 0;
|
|
}
|
|
|
|
FPDF_EXPORT FPDF_RESULT FPDF_CALLCONV FPDF_BStr_Clear(FPDF_BSTR* bstr) {
|
|
if (!bstr)
|
|
return -1;
|
|
|
|
if (bstr->str) {
|
|
FX_Free(bstr->str);
|
|
bstr->str = nullptr;
|
|
}
|
|
bstr->len = 0;
|
|
return 0;
|
|
}
|
|
#endif // PDF_ENABLE_XFA
|
|
|
|
FPDF_EXPORT FPDF_DEST FPDF_CALLCONV FPDF_GetNamedDest(FPDF_DOCUMENT document,
|
|
int index,
|
|
void* buffer,
|
|
long* buflen) {
|
|
if (!buffer)
|
|
*buflen = 0;
|
|
|
|
if (index < 0)
|
|
return nullptr;
|
|
|
|
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
|
|
if (!pDoc)
|
|
return nullptr;
|
|
|
|
const CPDF_Dictionary* pRoot = pDoc->GetRoot();
|
|
if (!pRoot)
|
|
return nullptr;
|
|
|
|
auto name_tree = CPDF_NameTree::Create(pDoc, "Dests");
|
|
size_t name_tree_count = name_tree ? name_tree->GetCount() : 0;
|
|
RetainPtr<const CPDF_Object> pDestObj;
|
|
WideString wsName;
|
|
if (static_cast<size_t>(index) >= name_tree_count) {
|
|
// If |index| is out of bounds, then try to retrieve the Nth old style named
|
|
// destination. Where N is 0-indexed, with N = index - name_tree_count.
|
|
RetainPtr<const CPDF_Dictionary> pDest = pRoot->GetDictFor("Dests");
|
|
if (!pDest)
|
|
return nullptr;
|
|
|
|
FX_SAFE_INT32 checked_count = name_tree_count;
|
|
checked_count += pDest->size();
|
|
if (!checked_count.IsValid() || index >= checked_count.ValueOrDie())
|
|
return nullptr;
|
|
|
|
index -= name_tree_count;
|
|
int i = 0;
|
|
ByteStringView bsName;
|
|
CPDF_DictionaryLocker locker(pDest);
|
|
for (const auto& it : locker) {
|
|
bsName = it.first.AsStringView();
|
|
pDestObj = it.second;
|
|
if (i == index)
|
|
break;
|
|
i++;
|
|
}
|
|
wsName = PDF_DecodeText(bsName.raw_span());
|
|
} else {
|
|
pDestObj = name_tree->LookupValueAndName(index, &wsName);
|
|
}
|
|
if (!pDestObj)
|
|
return nullptr;
|
|
if (const CPDF_Dictionary* pDict = pDestObj->AsDictionary()) {
|
|
pDestObj = pDict->GetArrayFor("D");
|
|
if (!pDestObj)
|
|
return nullptr;
|
|
}
|
|
if (!pDestObj->IsArray())
|
|
return nullptr;
|
|
|
|
ByteString utf16Name = wsName.ToUTF16LE();
|
|
int len = pdfium::base::checked_cast<int>(utf16Name.GetLength());
|
|
if (!buffer) {
|
|
*buflen = len;
|
|
} else if (len <= *buflen) {
|
|
memcpy(buffer, utf16Name.c_str(), len);
|
|
*buflen = len;
|
|
} else {
|
|
*buflen = -1;
|
|
}
|
|
return FPDFDestFromCPDFArray(pDestObj->AsArray());
|
|
}
|
|
|
|
FPDF_EXPORT int FPDF_CALLCONV FPDF_GetXFAPacketCount(FPDF_DOCUMENT document) {
|
|
CPDF_Document* doc = CPDFDocumentFromFPDFDocument(document);
|
|
if (!doc)
|
|
return -1;
|
|
|
|
return fxcrt::CollectionSize<int>(
|
|
GetXFAPackets(GetXFAEntryFromDocument(doc)));
|
|
}
|
|
|
|
FPDF_EXPORT unsigned long FPDF_CALLCONV
|
|
FPDF_GetXFAPacketName(FPDF_DOCUMENT document,
|
|
int index,
|
|
void* buffer,
|
|
unsigned long buflen) {
|
|
CPDF_Document* doc = CPDFDocumentFromFPDFDocument(document);
|
|
if (!doc || index < 0)
|
|
return 0;
|
|
|
|
std::vector<XFAPacket> xfa_packets =
|
|
GetXFAPackets(GetXFAEntryFromDocument(doc));
|
|
if (static_cast<size_t>(index) >= xfa_packets.size())
|
|
return 0;
|
|
|
|
return NulTerminateMaybeCopyAndReturnLength(xfa_packets[index].name, buffer,
|
|
buflen);
|
|
}
|
|
|
|
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
|
|
FPDF_GetXFAPacketContent(FPDF_DOCUMENT document,
|
|
int index,
|
|
void* buffer,
|
|
unsigned long buflen,
|
|
unsigned long* out_buflen) {
|
|
CPDF_Document* doc = CPDFDocumentFromFPDFDocument(document);
|
|
if (!doc || index < 0 || !out_buflen)
|
|
return false;
|
|
|
|
std::vector<XFAPacket> xfa_packets =
|
|
GetXFAPackets(GetXFAEntryFromDocument(doc));
|
|
if (static_cast<size_t>(index) >= xfa_packets.size())
|
|
return false;
|
|
|
|
*out_buflen = DecodeStreamMaybeCopyAndReturnLength(
|
|
xfa_packets[index].data,
|
|
{static_cast<uint8_t*>(buffer), static_cast<size_t>(buflen)});
|
|
return true;
|
|
}
|
|
|
|
FPDF_EXPORT unsigned long FPDF_CALLCONV
|
|
FPDF_GetTrailerEnds(FPDF_DOCUMENT document,
|
|
unsigned int* buffer,
|
|
unsigned long length) {
|
|
auto* doc = CPDFDocumentFromFPDFDocument(document);
|
|
if (!doc)
|
|
return 0;
|
|
|
|
// Start recording trailer ends.
|
|
auto* parser = doc->GetParser();
|
|
std::vector<unsigned int> trailer_ends = parser->GetTrailerEnds();
|
|
const unsigned long trailer_ends_len =
|
|
fxcrt::CollectionSize<unsigned long>(trailer_ends);
|
|
if (buffer && length >= trailer_ends_len) {
|
|
for (size_t i = 0; i < trailer_ends_len; ++i)
|
|
buffer[i] = trailer_ends[i];
|
|
}
|
|
|
|
return trailer_ends_len;
|
|
}
|