blob: da253087719955daee7bb8c992c0b450af46a7d3 [file] [log] [blame]
// Copyright 2014 PDFium Authors. All rights reserved.
// 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 "public/fpdfview.h"
#include <memory>
#include <utility>
#include <vector>
#include "build/build_config.h"
#include "core/fpdfapi/page/cpdf_docpagedata.h"
#include "core/fpdfapi/page/cpdf_occontext.h"
#include "core/fpdfapi/page/cpdf_page.h"
#include "core/fpdfapi/page/cpdf_pagemodule.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfapi/parser/cpdf_name.h"
#include "core/fpdfapi/parser/cpdf_parser.h"
#include "core/fpdfapi/parser/fpdf_parser_decode.h"
#include "core/fpdfapi/render/cpdf_docrenderdata.h"
#include "core/fpdfapi/render/cpdf_pagerendercache.h"
#include "core/fpdfapi/render/cpdf_pagerendercontext.h"
#include "core/fpdfapi/render/cpdf_rendercontext.h"
#include "core/fpdfapi/render/cpdf_renderoptions.h"
#include "core/fpdfdoc/cpdf_nametree.h"
#include "core/fpdfdoc/cpdf_viewerpreferences.h"
#include "core/fxcrt/cfx_readonlymemorystream.h"
#include "core/fxcrt/fx_stream.h"
#include "core/fxcrt/fx_system.h"
#include "core/fxcrt/unowned_ptr.h"
#include "core/fxge/cfx_defaultrenderdevice.h"
#include "core/fxge/cfx_gemodule.h"
#include "core/fxge/cfx_renderdevice.h"
#include "fpdfsdk/cpdfsdk_customaccess.h"
#include "fpdfsdk/cpdfsdk_formfillenvironment.h"
#include "fpdfsdk/cpdfsdk_helpers.h"
#include "fpdfsdk/cpdfsdk_pageview.h"
#include "fpdfsdk/cpdfsdk_renderpage.h"
#include "fxjs/ijs_runtime.h"
#include "public/fpdf_formfill.h"
#include "third_party/base/ptr_util.h"
#include "third_party/base/span.h"
#ifdef PDF_ENABLE_XFA
#include "fpdfsdk/fpdfxfa/cpdfxfa_context.h"
#include "fpdfsdk/fpdfxfa/cpdfxfa_page.h"
#include "fxbarcode/BC_Library.h"
#endif // PDF_ENABLE_XFA
#if defined(OS_WIN)
#include "core/fpdfapi/render/cpdf_progressiverenderer.h"
#include "core/fpdfapi/render/cpdf_windowsrenderdevice.h"
#include "public/fpdf_edit.h"
// These checks are here because core/ and public/ cannot depend on each other.
static_assert(WindowsPrintMode::kModeEmf == FPDF_PRINTMODE_EMF,
"WindowsPrintMode::kModeEmf value mismatch");
static_assert(WindowsPrintMode::kModeTextOnly == FPDF_PRINTMODE_TEXTONLY,
"WindowsPrintMode::kModeTextOnly value mismatch");
static_assert(WindowsPrintMode::kModePostScript2 == FPDF_PRINTMODE_POSTSCRIPT2,
"WindowsPrintMode::kModePostScript2 value mismatch");
static_assert(WindowsPrintMode::kModePostScript3 == FPDF_PRINTMODE_POSTSCRIPT3,
"WindowsPrintMode::kModePostScript3 value mismatch");
static_assert(WindowsPrintMode::kModePostScript2PassThrough ==
FPDF_PRINTMODE_POSTSCRIPT2_PASSTHROUGH,
"WindowsPrintMode::kModePostScript2PassThrough value mismatch");
static_assert(WindowsPrintMode::kModePostScript3PassThrough ==
FPDF_PRINTMODE_POSTSCRIPT3_PASSTHROUGH,
"WindowsPrintMode::kModePostScript3PassThrough value mismatch");
#endif // defined(OS_WIN)
namespace {
bool g_bLibraryInitialized = false;
FPDF_DOCUMENT LoadDocumentImpl(
const RetainPtr<IFX_SeekableReadStream>& pFileAccess,
FPDF_BYTESTRING password) {
if (!pFileAccess) {
ProcessParseError(CPDF_Parser::FILE_ERROR);
return nullptr;
}
auto pDocument = pdfium::MakeUnique<CPDF_Document>(
pdfium::MakeUnique<CPDF_DocRenderData>(),
pdfium::MakeUnique<CPDF_DocPageData>());
CPDF_Parser::Error error = pDocument->LoadDoc(pFileAccess, password);
if (error != CPDF_Parser::SUCCESS) {
ProcessParseError(error);
return nullptr;
}
ReportUnsupportedFeatures(pDocument.get());
return FPDFDocumentFromCPDFDocument(pDocument.release());
}
} // namespace
FPDF_EXPORT void FPDF_CALLCONV FPDF_InitLibrary() {
FPDF_InitLibraryWithConfig(nullptr);
}
FPDF_EXPORT void FPDF_CALLCONV
FPDF_InitLibraryWithConfig(const FPDF_LIBRARY_CONFIG* config) {
if (g_bLibraryInitialized)
return;
FXMEM_InitializePartitionAlloc();
CFX_GEModule::Create(config ? config->m_pUserFontPaths : nullptr);
CPDF_PageModule::Create();
#ifdef PDF_ENABLE_XFA
BC_Library_Init();
#endif // PDF_ENABLE_XFA
if (config && config->version >= 2)
IJS_Runtime::Initialize(config->m_v8EmbedderSlot, config->m_pIsolate);
g_bLibraryInitialized = true;
}
FPDF_EXPORT void FPDF_CALLCONV FPDF_DestroyLibrary() {
if (!g_bLibraryInitialized)
return;
#ifdef PDF_ENABLE_XFA
BC_Library_Destroy();
#endif // PDF_ENABLE_XFA
CPDF_PageModule::Destroy();
CFX_GEModule::Destroy();
IJS_Runtime::Destroy();
g_bLibraryInitialized = false;
}
FPDF_EXPORT void FPDF_CALLCONV FPDF_SetSandBoxPolicy(FPDF_DWORD policy,
FPDF_BOOL enable) {
return SetPDFSandboxPolicy(policy, enable);
}
#if defined(OS_WIN)
#if defined(PDFIUM_PRINT_TEXT_WITH_GDI)
FPDF_EXPORT void FPDF_CALLCONV
FPDF_SetTypefaceAccessibleFunc(PDFiumEnsureTypefaceCharactersAccessible func) {
g_pdfium_typeface_accessible_func = func;
}
FPDF_EXPORT void FPDF_CALLCONV FPDF_SetPrintTextWithGDI(FPDF_BOOL use_gdi) {
g_pdfium_print_text_with_gdi = !!use_gdi;
}
#endif // PDFIUM_PRINT_TEXT_WITH_GDI
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_SetPrintMode(int mode) {
if (mode < FPDF_PRINTMODE_EMF ||
mode > FPDF_PRINTMODE_POSTSCRIPT3_PASSTHROUGH) {
return FALSE;
}
g_pdfium_print_mode = static_cast<WindowsPrintMode>(mode);
return TRUE;
}
#endif // defined(OS_WIN)
FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
FPDF_LoadDocument(FPDF_STRING file_path, FPDF_BYTESTRING password) {
// NOTE: the creation of the file needs to be by the embedder on the
// other side of this API.
return LoadDocumentImpl(IFX_SeekableReadStream::CreateFromFilename(file_path),
password);
}
FPDF_EXPORT int FPDF_CALLCONV FPDF_GetFormType(FPDF_DOCUMENT document) {
const CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return FORMTYPE_NONE;
const CPDF_Dictionary* pRoot = pDoc->GetRoot();
if (!pRoot)
return FORMTYPE_NONE;
const CPDF_Dictionary* pAcroForm = pRoot->GetDictFor("AcroForm");
if (!pAcroForm)
return FORMTYPE_NONE;
const CPDF_Object* pXFA = pAcroForm->GetObjectFor("XFA");
if (!pXFA)
return FORMTYPE_ACRO_FORM;
bool bNeedsRendering = pRoot->GetBooleanFor("NeedsRendering", false);
return bNeedsRendering ? FORMTYPE_XFA_FULL : FORMTYPE_XFA_FOREGROUND;
}
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_LoadXFA(FPDF_DOCUMENT document) {
#ifdef PDF_ENABLE_XFA
auto* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return false;
auto* pContext = static_cast<CPDFXFA_Context*>(pDoc->GetExtension());
if (pContext)
return pContext->LoadXFADoc();
#endif // PDF_ENABLE_XFA
return false;
}
FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
FPDF_LoadMemDocument(const void* data_buf, int size, FPDF_BYTESTRING password) {
return LoadDocumentImpl(
pdfium::MakeRetain<CFX_ReadOnlyMemoryStream>(
pdfium::make_span(static_cast<const uint8_t*>(data_buf), size)),
password);
}
FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
FPDF_LoadCustomDocument(FPDF_FILEACCESS* pFileAccess,
FPDF_BYTESTRING password) {
if (!pFileAccess)
return nullptr;
return LoadDocumentImpl(pdfium::MakeRetain<CPDFSDK_CustomAccess>(pFileAccess),
password);
}
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_GetFileVersion(FPDF_DOCUMENT doc,
int* fileVersion) {
if (!fileVersion)
return false;
*fileVersion = 0;
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(doc);
if (!pDoc)
return false;
const CPDF_Parser* pParser = pDoc->GetParser();
if (!pParser)
return false;
*fileVersion = pParser->GetFileVersion();
return true;
}
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDF_DocumentHasValidCrossReferenceTable(FPDF_DOCUMENT document) {
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
return pDoc && pDoc->has_valid_cross_reference_table();
}
FPDF_EXPORT unsigned long FPDF_CALLCONV
FPDF_GetDocPermissions(FPDF_DOCUMENT document) {
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
return pDoc ? pDoc->GetUserPermissions() : 0;
}
FPDF_EXPORT int FPDF_CALLCONV
FPDF_GetSecurityHandlerRevision(FPDF_DOCUMENT document) {
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc || !pDoc->GetParser())
return -1;
const CPDF_Dictionary* pDict = pDoc->GetParser()->GetEncryptDict();
return pDict ? pDict->GetIntegerFor("R") : -1;
}
FPDF_EXPORT int FPDF_CALLCONV FPDF_GetPageCount(FPDF_DOCUMENT document) {
auto* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return 0;
auto* pExtension = pDoc->GetExtension();
return pExtension ? pExtension->GetPageCount() : pDoc->GetPageCount();
}
FPDF_EXPORT FPDF_PAGE FPDF_CALLCONV FPDF_LoadPage(FPDF_DOCUMENT document,
int page_index) {
auto* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return nullptr;
if (page_index < 0 || page_index >= FPDF_GetPageCount(document))
return nullptr;
#ifdef PDF_ENABLE_XFA
auto* pContext = static_cast<CPDFXFA_Context*>(pDoc->GetExtension());
if (pContext)
return FPDFPageFromIPDFPage(pContext->GetXFAPage(page_index).Leak());
#endif // PDF_ENABLE_XFA
CPDF_Dictionary* pDict = pDoc->GetPageDictionary(page_index);
if (!pDict)
return nullptr;
auto pPage = pdfium::MakeRetain<CPDF_Page>(pDoc, pDict);
pPage->SetRenderCache(pdfium::MakeUnique<CPDF_PageRenderCache>(pPage.Get()));
pPage->ParseContent();
return FPDFPageFromIPDFPage(pPage.Leak());
}
FPDF_EXPORT float FPDF_CALLCONV FPDF_GetPageWidthF(FPDF_PAGE page) {
IPDF_Page* pPage = IPDFPageFromFPDFPage(page);
return pPage ? pPage->GetPageWidth() : 0.0f;
}
FPDF_EXPORT double FPDF_CALLCONV FPDF_GetPageWidth(FPDF_PAGE page) {
return FPDF_GetPageWidthF(page);
}
FPDF_EXPORT float FPDF_CALLCONV FPDF_GetPageHeightF(FPDF_PAGE page) {
IPDF_Page* pPage = IPDFPageFromFPDFPage(page);
return pPage ? pPage->GetPageHeight() : 0.0f;
}
FPDF_EXPORT double FPDF_CALLCONV FPDF_GetPageHeight(FPDF_PAGE page) {
return FPDF_GetPageHeightF(page);
}
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_GetPageBoundingBox(FPDF_PAGE page,
FS_RECTF* rect) {
if (!rect)
return false;
CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
if (!pPage)
return false;
*rect = FSRectFFromCFXFloatRect(pPage->GetBBox());
return true;
}
#if defined(OS_WIN)
namespace {
const double kEpsilonSize = 0.01f;
void GetScaling(CPDF_Page* pPage,
int size_x,
int size_y,
int rotate,
double* scale_x,
double* scale_y) {
ASSERT(pPage);
ASSERT(scale_x);
ASSERT(scale_y);
double page_width = pPage->GetPageWidth();
double page_height = pPage->GetPageHeight();
if (page_width < kEpsilonSize || page_height < kEpsilonSize)
return;
if (rotate % 2 == 0) {
*scale_x = size_x / page_width;
*scale_y = size_y / page_height;
} else {
*scale_x = size_y / page_width;
*scale_y = size_x / page_height;
}
}
FX_RECT GetMaskDimensionsAndOffsets(CPDF_Page* pPage,
int start_x,
int start_y,
int size_x,
int size_y,
int rotate,
const CFX_FloatRect& mask_box) {
double scale_x = 0.0f;
double scale_y = 0.0f;
GetScaling(pPage, size_x, size_y, rotate, &scale_x, &scale_y);
if (scale_x < kEpsilonSize || scale_y < kEpsilonSize)
return FX_RECT();
// Compute sizes in page points. Round down to catch the entire bitmap.
int start_x_bm = static_cast<int>(mask_box.left * scale_x);
int start_y_bm = static_cast<int>(mask_box.bottom * scale_y);
int size_x_bm = static_cast<int>(mask_box.right * scale_x + 1.0f) -
static_cast<int>(mask_box.left * scale_x);
int size_y_bm = static_cast<int>(mask_box.top * scale_y + 1.0f) -
static_cast<int>(mask_box.bottom * scale_y);
// Get page rotation
int page_rotation = pPage->GetPageRotation();
// Compute offsets
int offset_x = 0;
int offset_y = 0;
if (size_x > size_y)
std::swap(size_x_bm, size_y_bm);
switch ((rotate + page_rotation) % 4) {
case 0:
offset_x = start_x_bm + start_x;
offset_y = start_y + size_y - size_y_bm - start_y_bm;
break;
case 1:
offset_x = start_y_bm + start_x;
offset_y = start_x_bm + start_y;
break;
case 2:
offset_x = start_x + size_x - size_x_bm - start_x_bm;
offset_y = start_y_bm + start_y;
break;
case 3:
offset_x = start_x + size_x - size_x_bm - start_y_bm;
offset_y = start_y + size_y - size_y_bm - start_x_bm;
break;
}
return FX_RECT(offset_x, offset_y, offset_x + size_x_bm,
offset_y + size_y_bm);
}
// 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) {
ASSERT(bitmap_area);
*bitmap_area = GetMaskDimensionsAndOffsets(pPage, start_x, start_y, size_x,
size_y, rotate, mask_box);
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_Argb))
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_Rgb32))
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 = pdfium::MakeUnique<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. TODO(rbpotter): Find out why this still breaks printing for some
// PDFs (see crbug.com/777837).
const bool bEnableImageMasks = false;
const bool bNewBitmap = pPage->BackgroundAlphaNeeded() ||
(pPage->HasImageMask() && !bEnableImageMasks) ||
pPage->GetMaskBoundingBoxes().size() > 100;
const bool bHasMask = pPage->HasImageMask() && !bNewBitmap;
if (!bNewBitmap && !bHasMask) {
pContext->m_pDevice = pdfium::MakeUnique<CPDF_WindowsRenderDevice>(dc);
CPDFSDK_RenderPageWithContext(pContext, pPage, start_x, start_y, size_x,
size_y, rotate, flags,
/*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_Argb);
pBitmap->Clear(0x00ffffff);
CFX_DefaultRenderDevice* pDevice = new CFX_DefaultRenderDevice;
pContext->m_pDevice = pdfium::WrapUnique(pDevice);
pDevice->Attach(pBitmap, false, nullptr, false);
if (bHasMask) {
pContext->m_pOptions = pdfium::MakeUnique<CPDF_RenderOptions>();
pContext->m_pOptions->GetOptions().bBreakForMasks = true;
}
CPDFSDK_RenderPageWithContext(pContext, pPage, start_x, start_y, size_x,
size_y, rotate, flags, /*need_to_restore=*/true,
/*pause=*/nullptr);
if (!bHasMask) {
CPDF_WindowsRenderDevice WinDC(dc);
bool bitsStretched = false;
if (WinDC.GetDeviceType() == DeviceType::kPrinter) {
auto pDst = pdfium::MakeRetain<CFX_DIBitmap>();
if (pDst->Create(size_x, size_y, FXDIB_Rgb32)) {
memset(pDst->GetBuffer(), -1, pBitmap->GetPitch() * size_y);
pDst->CompositeBitmap(0, 0, size_x, size_y, pBitmap, 0, 0,
BlendMode::kNormal, nullptr, false);
WinDC.StretchDIBits(pDst, 0, 0, size_x, size_y);
bitsStretched = true;
}
}
if (!bitsStretched)
WinDC.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.
pOwnedContext = pdfium::MakeUnique<CPDF_PageRenderContext>();
pContext = pOwnedContext.get();
pPage->SetRenderContext(std::move(pOwnedContext));
pContext->m_pDevice = pdfium::MakeUnique<CPDF_WindowsRenderDevice>(dc);
pContext->m_pOptions = pdfium::MakeUnique<CPDF_RenderOptions>();
pContext->m_pOptions->GetOptions().bBreakForMasks = true;
CPDFSDK_RenderPageWithContext(pContext, pPage, start_x, start_y, size_x,
size_y, rotate, flags, /*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 // defined(OS_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 = pdfium::MakeUnique<CPDF_PageRenderContext>();
CPDF_PageRenderContext* pContext = pOwnedContext.get();
CPDF_Page::RenderContextClearer clearer(pPage);
pPage->SetRenderContext(std::move(pOwnedContext));
auto pOwnedDevice = pdfium::MakeUnique<CFX_DefaultRenderDevice>();
CFX_DefaultRenderDevice* pDevice = pOwnedDevice.get();
pContext->m_pDevice = std::move(pOwnedDevice);
RetainPtr<CFX_DIBitmap> pBitmap(CFXDIBitmapFromFPDFBitmap(bitmap));
pDevice->Attach(pBitmap, !!(flags & FPDF_REVERSE_BYTE_ORDER), nullptr, false);
CPDFSDK_RenderPageWithContext(pContext, pPage, start_x, start_y, size_x,
size_y, rotate, flags, /*need_to_restore=*/true,
/*pause=*/nullptr);
#ifdef _SKIA_SUPPORT_PATHS_
pDevice->Flush(true);
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 = pdfium::MakeUnique<CPDF_PageRenderContext>();
CPDF_PageRenderContext* pContext = pOwnedContext.get();
CPDF_Page::RenderContextClearer clearer(pPage);
pPage->SetRenderContext(std::move(pOwnedContext));
auto pOwnedDevice = pdfium::MakeUnique<CFX_DefaultRenderDevice>();
CFX_DefaultRenderDevice* pDevice = pOwnedDevice.get();
pContext->m_pDevice = std::move(pOwnedDevice);
RetainPtr<CFX_DIBitmap> pBitmap(CFXDIBitmapFromFPDFBitmap(bitmap));
pDevice->Attach(pBitmap, !!(flags & FPDF_REVERSE_BYTE_ORDER), nullptr, false);
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);
}
#ifdef _SKIA_SUPPORT_
FPDF_EXPORT FPDF_RECORDER FPDF_CALLCONV FPDF_RenderPageSkp(FPDF_PAGE page,
int size_x,
int size_y) {
CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
if (!pPage)
return nullptr;
auto pOwnedContext = pdfium::MakeUnique<CPDF_PageRenderContext>();
CPDF_PageRenderContext* pContext = pOwnedContext.get();
CPDF_Page::RenderContextClearer clearer(pPage);
pPage->SetRenderContext(std::move(pOwnedContext));
auto skDevice = pdfium::MakeUnique<CFX_DefaultRenderDevice>();
FPDF_RECORDER recorder = skDevice->CreateRecorder(size_x, size_y);
pContext->m_pDevice = std::move(skDevice);
CPDFSDK_RenderPageWithContext(pContext, pPage, 0, 0, size_x, size_y, 0, 0,
/*need_to_restore=*/true, /*pause=*/nullptr);
return recorder;
}
#endif // _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;
CPDFSDK_PageView* pPageView =
static_cast<CPDFSDK_PageView*>(pPage->AsPDFPage()->GetView());
if (!pPageView || pPageView->IsBeingDestroyed())
return;
if (pPageView->IsLocked()) {
pPageView->TakePageOwnership();
return;
}
// This will delete the |pPageView| object. We must cleanup the PageView
// first because it will attempt to reset the View on the |pPage| during
// destruction.
pPageView->GetFormFillEnv()->RemovePageView(pPage.Get());
}
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);
Optional<CFX_PointF> pos =
pPage->DeviceToPage(rect, rotate, CFX_PointF(device_x, device_y));
if (!pos)
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));
Optional<CFX_PointF> pos = pPage->PageToDevice(rect, rotate, page_point);
if (!pos)
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_Argb : FXDIB_Rgb32))
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_8bppRgb;
break;
case FPDFBitmap_BGR:
fx_format = FXDIB_Rgb;
break;
case FPDFBitmap_BGRx:
fx_format = FXDIB_Rgb32;
break;
case FPDFBitmap_BGRA:
fx_format = FXDIB_Argb;
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.Get(), 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_8bppRgb:
case FXDIB_8bppMask:
return FPDFBitmap_Gray;
case FXDIB_Rgb:
return FPDFBitmap_BGR;
case FXDIB_Rgb32:
return FPDFBitmap_BGRx;
case FXDIB_Argb:
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, false, nullptr, false);
if (!pBitmap->HasAlpha())
color |= 0xFF000000;
device.FillRect(FX_RECT(left, top, left + width, top + height), color);
}
FPDF_EXPORT void* FPDF_CALLCONV FPDFBitmap_GetBuffer(FPDF_BITMAP bitmap) {
return bitmap ? CFXDIBitmapFromFPDFBitmap(bitmap)->GetBuffer() : 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->GetXFAPage(page_index);
if (!pPage)
return false;
size->width = pPage->GetPageWidth();
size->height = pPage->GetPageHeight();
return true;
}
#endif // PDF_ENABLE_XFA
CPDF_Dictionary* pDict = pDoc->GetPageDictionary(page_index);
if (!pDict)
return false;
auto page = pdfium::MakeRetain<CPDF_Page>(pDoc, pDict);
page->SetRenderCache(pdfium::MakeUnique<CPDF_PageRenderCache>(page.Get()));
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);
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);
Optional<ByteString> bsVal = viewRef.GenericName(key);
if (!bsVal)
return 0;
unsigned long dwStringLen = bsVal->GetLength() + 1;
if (buffer && length >= dwStringLen)
memcpy(buffer, bsVal->c_str(), dwStringLen);
return dwStringLen;
}
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;
CPDF_NameTree nameTree(pDoc, "Dests");
pdfium::base::CheckedNumeric<FPDF_DWORD> count = nameTree.GetCount();
const CPDF_Dictionary* pDest = pRoot->GetDictFor("Dests");
if (pDest)
count += pDest->size();
if (!count.IsValid())
return 0;
return count.ValueOrDie();
}
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;
CPDF_NameTree name_tree(pDoc, "Dests");
ByteStringView name_view(name);
return FPDFDestFromCPDFArray(
name_tree.LookupNamedDest(pDoc, PDF_DecodeText(name_view.raw_span())));
}
#ifdef PDF_ENABLE_V8
FPDF_EXPORT const char* FPDF_CALLCONV FPDF_GetRecommendedV8Flags() {
// Reduce exposure since no PDF should contain web assembly.
// Use interpreted JS only to avoid RWX pages in our address space.
return "--no-expose-wasm --jitless";
}
#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 = 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;
CPDF_Object* pDestObj = nullptr;
WideString wsName;
CPDF_NameTree nameTree(pDoc, "Dests");
int count = nameTree.GetCount();
if (index >= count) {
const CPDF_Dictionary* pDest = pRoot->GetDictFor("Dests");
if (!pDest)
return nullptr;
pdfium::base::CheckedNumeric<int> checked_count = count;
checked_count += pDest->size();
if (!checked_count.IsValid() || index >= checked_count.ValueOrDie())
return nullptr;
index -= count;
int i = 0;
ByteStringView bsName;
CPDF_DictionaryLocker locker(pDest);
for (const auto& it : locker) {
bsName = it.first.AsStringView();
pDestObj = it.second.Get();
if (!pDestObj)
continue;
if (i == index)
break;
i++;
}
wsName = PDF_DecodeText(bsName.raw_span());
} else {
pDestObj = nameTree.LookupValueAndName(index, &wsName);
}
if (!pDestObj)
return nullptr;
if (CPDF_Dictionary* pDict = pDestObj->AsDictionary()) {
pDestObj = pDict->GetArrayFor("D");
if (!pDestObj)
return nullptr;
}
if (!pDestObj->IsArray())
return nullptr;
ByteString utf16Name = wsName.ToUTF16LE();
int len = 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());
}