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// 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 <windows.h>
#include <algorithm>
#include <memory>
#include <vector>
#include "core/fxcrt/fx_system.h"
#include "core/fxge/cfx_font.h"
#include "core/fxge/cfx_windowsrenderdevice.h"
#include "core/fxge/dib/cfx_dibextractor.h"
#include "core/fxge/dib/cfx_imagerenderer.h"
#include "core/fxge/dib/cstretchengine.h"
#include "core/fxge/fx_freetype.h"
#include "core/fxge/win32/cpsoutput.h"
#include "core/fxge/win32/win32_int.h"
#include "third_party/base/ptr_util.h"
#if defined(PDFIUM_PRINT_TEXT_WITH_GDI)
namespace {
class ScopedState {
public:
ScopedState(HDC hDC, HFONT hFont) : m_hDC(hDC) {
m_iState = SaveDC(m_hDC);
m_hFont = SelectObject(m_hDC, hFont);
}
~ScopedState() {
HGDIOBJ hFont = SelectObject(m_hDC, m_hFont);
DeleteObject(hFont);
RestoreDC(m_hDC, m_iState);
}
private:
HDC m_hDC;
HGDIOBJ m_hFont;
int m_iState;
ScopedState(const ScopedState&) = delete;
void operator=(const ScopedState&) = delete;
};
} // namespace
bool g_pdfium_print_text_with_gdi = false;
PDFiumEnsureTypefaceCharactersAccessible g_pdfium_typeface_accessible_func =
nullptr;
#endif
CGdiPrinterDriver::CGdiPrinterDriver(HDC hDC)
: CGdiDeviceDriver(hDC, FXDC_PRINTER),
m_HorzSize(::GetDeviceCaps(m_hDC, HORZSIZE)),
m_VertSize(::GetDeviceCaps(m_hDC, VERTSIZE)) {}
CGdiPrinterDriver::~CGdiPrinterDriver() {}
int CGdiPrinterDriver::GetDeviceCaps(int caps_id) const {
if (caps_id == FXDC_HORZ_SIZE)
return m_HorzSize;
if (caps_id == FXDC_VERT_SIZE)
return m_VertSize;
return CGdiDeviceDriver::GetDeviceCaps(caps_id);
}
bool CGdiPrinterDriver::SetDIBits(const RetainPtr<CFX_DIBSource>& pSource,
uint32_t color,
const FX_RECT* pSrcRect,
int left,
int top,
int blend_type) {
if (pSource->IsAlphaMask()) {
FX_RECT clip_rect(left, top, left + pSrcRect->Width(),
top + pSrcRect->Height());
return StretchDIBits(pSource, color, left - pSrcRect->left,
top - pSrcRect->top, pSource->GetWidth(),
pSource->GetHeight(), &clip_rect, 0,
FXDIB_BLEND_NORMAL);
}
ASSERT(pSource && !pSource->IsAlphaMask() && pSrcRect);
ASSERT(blend_type == FXDIB_BLEND_NORMAL);
if (pSource->HasAlpha())
return false;
CFX_DIBExtractor temp(pSource);
RetainPtr<CFX_DIBitmap> pBitmap = temp.GetBitmap();
if (!pBitmap)
return false;
return GDI_SetDIBits(pBitmap, pSrcRect, left, top);
}
bool CGdiPrinterDriver::StretchDIBits(const RetainPtr<CFX_DIBSource>& pSource,
uint32_t color,
int dest_left,
int dest_top,
int dest_width,
int dest_height,
const FX_RECT* pClipRect,
uint32_t flags,
int blend_type) {
if (pSource->IsAlphaMask()) {
int alpha = FXARGB_A(color);
if (pSource->GetBPP() != 1 || alpha != 255)
return false;
if (dest_width < 0 || dest_height < 0) {
RetainPtr<CFX_DIBitmap> pFlipped =
pSource->FlipImage(dest_width < 0, dest_height < 0);
if (!pFlipped)
return false;
if (dest_width < 0)
dest_left += dest_width;
if (dest_height < 0)
dest_top += dest_height;
return GDI_StretchBitMask(pFlipped, dest_left, dest_top, abs(dest_width),
abs(dest_height), color, flags);
}
CFX_DIBExtractor temp(pSource);
RetainPtr<CFX_DIBitmap> pBitmap = temp.GetBitmap();
if (!pBitmap)
return false;
return GDI_StretchBitMask(pBitmap, dest_left, dest_top, dest_width,
dest_height, color, flags);
}
if (pSource->HasAlpha())
return false;
if (dest_width < 0 || dest_height < 0) {
RetainPtr<CFX_DIBitmap> pFlipped =
pSource->FlipImage(dest_width < 0, dest_height < 0);
if (!pFlipped)
return false;
if (dest_width < 0)
dest_left += dest_width;
if (dest_height < 0)
dest_top += dest_height;
return GDI_StretchDIBits(pFlipped, dest_left, dest_top, abs(dest_width),
abs(dest_height), flags);
}
CFX_DIBExtractor temp(pSource);
RetainPtr<CFX_DIBitmap> pBitmap = temp.GetBitmap();
if (!pBitmap)
return false;
return GDI_StretchDIBits(pBitmap, dest_left, dest_top, dest_width,
dest_height, flags);
}
bool CGdiPrinterDriver::StartDIBits(const RetainPtr<CFX_DIBSource>& pSource,
int bitmap_alpha,
uint32_t color,
const CFX_Matrix* pMatrix,
uint32_t render_flags,
std::unique_ptr<CFX_ImageRenderer>* handle,
int blend_type) {
if (bitmap_alpha < 255 || pSource->HasAlpha() ||
(pSource->IsAlphaMask() && (pSource->GetBPP() != 1))) {
return false;
}
CFX_FloatRect unit_rect = pMatrix->GetUnitRect();
FX_RECT full_rect = unit_rect.GetOuterRect();
if (fabs(pMatrix->b) < 0.5f && pMatrix->a != 0 && fabs(pMatrix->c) < 0.5f &&
pMatrix->d != 0) {
bool bFlipX = pMatrix->a < 0;
bool bFlipY = pMatrix->d > 0;
return StretchDIBits(pSource, color,
bFlipX ? full_rect.right : full_rect.left,
bFlipY ? full_rect.bottom : full_rect.top,
bFlipX ? -full_rect.Width() : full_rect.Width(),
bFlipY ? -full_rect.Height() : full_rect.Height(),
nullptr, 0, blend_type);
}
if (fabs(pMatrix->a) >= 0.5f || fabs(pMatrix->d) >= 0.5f)
return false;
RetainPtr<CFX_DIBitmap> pTransformed =
pSource->SwapXY(pMatrix->c > 0, pMatrix->b < 0);
if (!pTransformed)
return false;
return StretchDIBits(pTransformed, color, full_rect.left, full_rect.top,
full_rect.Width(), full_rect.Height(), nullptr, 0,
blend_type);
}
bool CGdiPrinterDriver::DrawDeviceText(int nChars,
const FXTEXT_CHARPOS* pCharPos,
CFX_Font* pFont,
const CFX_Matrix* pObject2Device,
float font_size,
uint32_t color) {
#if defined(PDFIUM_PRINT_TEXT_WITH_GDI)
if (!g_pdfium_print_text_with_gdi)
return false;
if (nChars < 1 || !pFont || !pFont->IsEmbedded() || !pFont->IsTTFont())
return false;
// Scale factor used to minimize the kerning problems caused by rounding
// errors below. Value chosen based on the title of https://crbug.com/18383
const double kScaleFactor = 10;
// Font
//
// Note that |pFont| has the actual font to render with embedded within, but
// but unfortunately AddFontMemResourceEx() does not seem to cooperate.
// Loading font data to memory seems to work, but then enumerating the fonts
// fails to find it. This requires more investigation. In the meanwhile,
// assume the printing is happening on the machine that generated the PDF, so
// the embedded font, if not a web font, is available through GDI anyway.
// TODO(thestig): Figure out why AddFontMemResourceEx() does not work.
// Generalize this method to work for all PDFs with embedded fonts.
// In sandboxed environments, font loading may not work at all, so this may be
// the best possible effort.
LOGFONT lf = {};
lf.lfHeight = -font_size * kScaleFactor;
lf.lfWeight = pFont->IsBold() ? FW_BOLD : FW_NORMAL;
lf.lfItalic = pFont->IsItalic();
lf.lfCharSet = DEFAULT_CHARSET;
const WideString wsName = pFont->GetFaceName().UTF8Decode();
size_t iNameLen =
std::min(wsName.GetLength(), static_cast<size_t>(LF_FACESIZE - 1));
memcpy(lf.lfFaceName, wsName.c_str(), sizeof(lf.lfFaceName[0]) * iNameLen);
lf.lfFaceName[iNameLen] = 0;
HFONT hFont = CreateFontIndirect(&lf);
if (!hFont)
return false;
ScopedState state(m_hDC, hFont);
size_t nTextMetricSize = GetOutlineTextMetrics(m_hDC, 0, nullptr);
if (nTextMetricSize == 0) {
// Give up and fail if there is no way to get the font to try again.
if (!g_pdfium_typeface_accessible_func)
return false;
// Try to get the font. Any letter will do.
g_pdfium_typeface_accessible_func(&lf, L"A", 1);
nTextMetricSize = GetOutlineTextMetrics(m_hDC, 0, nullptr);
if (nTextMetricSize == 0)
return false;
}
std::vector<BYTE> buf(nTextMetricSize);
OUTLINETEXTMETRIC* pTextMetric =
reinterpret_cast<OUTLINETEXTMETRIC*>(buf.data());
if (GetOutlineTextMetrics(m_hDC, nTextMetricSize, pTextMetric) == 0)
return false;
// If the selected font is not the requested font, then bail out. This can
// happen with web fonts, for example.
wchar_t* wsSelectedName = reinterpret_cast<wchar_t*>(
buf.data() + reinterpret_cast<size_t>(pTextMetric->otmpFaceName));
if (wsName != wsSelectedName)
return false;
// Transforms
SetGraphicsMode(m_hDC, GM_ADVANCED);
XFORM xform;
xform.eM11 = pObject2Device->a / kScaleFactor;
xform.eM12 = pObject2Device->b / kScaleFactor;
xform.eM21 = -pObject2Device->c / kScaleFactor;
xform.eM22 = -pObject2Device->d / kScaleFactor;
xform.eDx = pObject2Device->e;
xform.eDy = pObject2Device->f;
ModifyWorldTransform(m_hDC, &xform, MWT_LEFTMULTIPLY);
// Color
FX_COLORREF colorref = ArgbToColorRef(color);
SetTextColor(m_hDC, colorref);
SetBkMode(m_hDC, TRANSPARENT);
// Text
WideString wsText;
std::vector<INT> spacing(nChars);
float fPreviousOriginX = 0;
for (int i = 0; i < nChars; ++i) {
// Only works with PDFs from Skia's PDF generator. Cannot handle arbitrary
// values from PDFs.
const FXTEXT_CHARPOS& charpos = pCharPos[i];
ASSERT(charpos.m_AdjustMatrix[0] == 0);
ASSERT(charpos.m_AdjustMatrix[1] == 0);
ASSERT(charpos.m_AdjustMatrix[2] == 0);
ASSERT(charpos.m_AdjustMatrix[3] == 0);
ASSERT(charpos.m_Origin.y == 0);
// Round the spacing to the nearest integer, but keep track of the rounding
// error for calculating the next spacing value.
float fOriginX = charpos.m_Origin.x * kScaleFactor;
float fPixelSpacing = fOriginX - fPreviousOriginX;
spacing[i] = FXSYS_round(fPixelSpacing);
fPreviousOriginX = fOriginX - (fPixelSpacing - spacing[i]);
wsText += charpos.m_GlyphIndex;
}
// Draw
SetTextAlign(m_hDC, TA_LEFT | TA_BASELINE);
if (ExtTextOutW(m_hDC, 0, 0, ETO_GLYPH_INDEX, nullptr, wsText.c_str(), nChars,
nChars > 1 ? &spacing[1] : nullptr)) {
return true;
}
// Give up and fail if there is no way to get the font to try again.
if (!g_pdfium_typeface_accessible_func)
return false;
// Try to get the font and draw again.
g_pdfium_typeface_accessible_func(&lf, wsText.c_str(), nChars);
return !!ExtTextOutW(m_hDC, 0, 0, ETO_GLYPH_INDEX, nullptr, wsText.c_str(),
nChars, nChars > 1 ? &spacing[1] : nullptr);
#else
return false;
#endif
}
CPSPrinterDriver::CPSPrinterDriver(HDC hDC, int pslevel, bool bCmykOutput)
: m_hDC(hDC), m_bCmykOutput(bCmykOutput) {
m_HorzSize = ::GetDeviceCaps(m_hDC, HORZSIZE);
m_VertSize = ::GetDeviceCaps(m_hDC, VERTSIZE);
m_Width = ::GetDeviceCaps(m_hDC, HORZRES);
m_Height = ::GetDeviceCaps(m_hDC, VERTRES);
m_nBitsPerPixel = ::GetDeviceCaps(m_hDC, BITSPIXEL);
m_PSRenderer.Init(pdfium::MakeRetain<CPSOutput>(m_hDC), pslevel, m_Width,
m_Height, bCmykOutput);
HRGN hRgn = ::CreateRectRgn(0, 0, 1, 1);
int ret = ::GetClipRgn(hDC, hRgn);
if (ret == 1) {
ret = ::GetRegionData(hRgn, 0, NULL);
if (ret) {
RGNDATA* pData = reinterpret_cast<RGNDATA*>(FX_Alloc(uint8_t, ret));
ret = ::GetRegionData(hRgn, ret, pData);
if (ret) {
CFX_PathData path;
for (uint32_t i = 0; i < pData->rdh.nCount; i++) {
RECT* pRect =
reinterpret_cast<RECT*>(pData->Buffer + pData->rdh.nRgnSize * i);
path.AppendRect(static_cast<float>(pRect->left),
static_cast<float>(pRect->bottom),
static_cast<float>(pRect->right),
static_cast<float>(pRect->top));
}
m_PSRenderer.SetClip_PathFill(&path, nullptr, FXFILL_WINDING);
}
FX_Free(pData);
}
}
::DeleteObject(hRgn);
}
CPSPrinterDriver::~CPSPrinterDriver() {
EndRendering();
}
int CPSPrinterDriver::GetDeviceCaps(int caps_id) const {
switch (caps_id) {
case FXDC_DEVICE_CLASS:
return FXDC_PRINTER;
case FXDC_PIXEL_WIDTH:
return m_Width;
case FXDC_PIXEL_HEIGHT:
return m_Height;
case FXDC_BITS_PIXEL:
return m_nBitsPerPixel;
case FXDC_RENDER_CAPS:
return m_bCmykOutput ? FXRC_BIT_MASK | FXRC_CMYK_OUTPUT : FXRC_BIT_MASK;
case FXDC_HORZ_SIZE:
return m_HorzSize;
case FXDC_VERT_SIZE:
return m_VertSize;
}
return 0;
}
bool CPSPrinterDriver::StartRendering() {
return m_PSRenderer.StartRendering();
}
void CPSPrinterDriver::EndRendering() {
m_PSRenderer.EndRendering();
}
void CPSPrinterDriver::SaveState() {
m_PSRenderer.SaveState();
}
void CPSPrinterDriver::RestoreState(bool bKeepSaved) {
m_PSRenderer.RestoreState(bKeepSaved);
}
bool CPSPrinterDriver::SetClip_PathFill(const CFX_PathData* pPathData,
const CFX_Matrix* pObject2Device,
int fill_mode) {
m_PSRenderer.SetClip_PathFill(pPathData, pObject2Device, fill_mode);
return true;
}
bool CPSPrinterDriver::SetClip_PathStroke(
const CFX_PathData* pPathData,
const CFX_Matrix* pObject2Device,
const CFX_GraphStateData* pGraphState) {
m_PSRenderer.SetClip_PathStroke(pPathData, pObject2Device, pGraphState);
return true;
}
bool CPSPrinterDriver::DrawPath(const CFX_PathData* pPathData,
const CFX_Matrix* pObject2Device,
const CFX_GraphStateData* pGraphState,
FX_ARGB fill_color,
FX_ARGB stroke_color,
int fill_mode,
int blend_type) {
if (blend_type != FXDIB_BLEND_NORMAL) {
return false;
}
return m_PSRenderer.DrawPath(pPathData, pObject2Device, pGraphState,
fill_color, stroke_color, fill_mode & 3);
}
bool CPSPrinterDriver::GetClipBox(FX_RECT* pRect) {
*pRect = m_PSRenderer.GetClipBox();
return true;
}
bool CPSPrinterDriver::SetDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
uint32_t color,
const FX_RECT* pSrcRect,
int left,
int top,
int blend_type) {
if (blend_type != FXDIB_BLEND_NORMAL)
return false;
return m_PSRenderer.SetDIBits(pBitmap, color, left, top);
}
bool CPSPrinterDriver::StretchDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
uint32_t color,
int dest_left,
int dest_top,
int dest_width,
int dest_height,
const FX_RECT* pClipRect,
uint32_t flags,
int blend_type) {
if (blend_type != FXDIB_BLEND_NORMAL)
return false;
return m_PSRenderer.StretchDIBits(pBitmap, color, dest_left, dest_top,
dest_width, dest_height, flags);
}
bool CPSPrinterDriver::StartDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
int bitmap_alpha,
uint32_t color,
const CFX_Matrix* pMatrix,
uint32_t render_flags,
std::unique_ptr<CFX_ImageRenderer>* handle,
int blend_type) {
if (blend_type != FXDIB_BLEND_NORMAL)
return false;
if (bitmap_alpha < 255)
return false;
*handle = nullptr;
return m_PSRenderer.DrawDIBits(pBitmap, color, pMatrix, render_flags);
}
bool CPSPrinterDriver::DrawDeviceText(int nChars,
const FXTEXT_CHARPOS* pCharPos,
CFX_Font* pFont,
const CFX_Matrix* pObject2Device,
float font_size,
uint32_t color) {
return m_PSRenderer.DrawText(nChars, pCharPos, pFont, pObject2Device,
font_size, color);
}
CTextOnlyPrinterDriver::CTextOnlyPrinterDriver(HDC hDC)
: m_hDC(hDC),
m_Width(INT_MAX),
m_Height(INT_MAX),
m_HorzSize(INT_MAX),
m_VertSize(INT_MAX),
m_OriginY(0.0f),
m_SetOrigin(false) {
m_nBitsPerPixel = ::GetDeviceCaps(m_hDC, BITSPIXEL);
}
CTextOnlyPrinterDriver::~CTextOnlyPrinterDriver() {
EndRendering();
}
int CTextOnlyPrinterDriver::GetDeviceCaps(int caps_id) const {
switch (caps_id) {
case FXDC_DEVICE_CLASS:
return FXDC_PRINTER;
case FXDC_PIXEL_WIDTH:
return m_Width;
case FXDC_PIXEL_HEIGHT:
return m_Height;
case FXDC_BITS_PIXEL:
return m_nBitsPerPixel;
case FXDC_RENDER_CAPS:
return 0;
case FXDC_HORZ_SIZE:
return m_HorzSize;
case FXDC_VERT_SIZE:
return m_VertSize;
}
return 0;
}
bool CTextOnlyPrinterDriver::SetClip_PathFill(const CFX_PathData* pPathData,
const CFX_Matrix* pObject2Device,
int fill_mode) {
return true;
}
bool CTextOnlyPrinterDriver::SetClip_PathStroke(
const CFX_PathData* pPathData,
const CFX_Matrix* pObject2Device,
const CFX_GraphStateData* pGraphState) {
return false;
}
bool CTextOnlyPrinterDriver::DrawPath(const CFX_PathData* pPathData,
const CFX_Matrix* pObject2Device,
const CFX_GraphStateData* pGraphState,
uint32_t fill_color,
uint32_t stroke_color,
int fill_mode,
int blend_type) {
return false;
}
bool CTextOnlyPrinterDriver::SetDIBits(const RetainPtr<CFX_DIBSource>& pBitmap,
uint32_t color,
const FX_RECT* pSrcRect,
int left,
int top,
int blend_type) {
return false;
}
bool CTextOnlyPrinterDriver::GetClipBox(FX_RECT* pRect) {
pRect->left = 0;
pRect->right = m_Width;
pRect->top = 0;
pRect->bottom = m_Height;
return true;
}
bool CTextOnlyPrinterDriver::StretchDIBits(
const RetainPtr<CFX_DIBSource>& pBitmap,
uint32_t color,
int dest_left,
int dest_top,
int dest_width,
int dest_height,
const FX_RECT* pClipRect,
uint32_t flags,
int blend_type) {
return false;
}
bool CTextOnlyPrinterDriver::StartDIBits(
const RetainPtr<CFX_DIBSource>& pBitmap,
int bitmap_alpha,
uint32_t color,
const CFX_Matrix* pMatrix,
uint32_t render_flags,
std::unique_ptr<CFX_ImageRenderer>* handle,
int blend_type) {
return false;
}
bool CTextOnlyPrinterDriver::DrawDeviceText(int nChars,
const FXTEXT_CHARPOS* pCharPos,
CFX_Font* pFont,
const CFX_Matrix* pObject2Device,
float font_size,
uint32_t color) {
if (g_pdfium_print_mode != 1)
return false;
if (nChars < 1 || !pFont || !pFont->IsEmbedded() || !pFont->IsTTFont())
return false;
// Scale factor used to minimize the kerning problems caused by rounding
// errors below. Value chosen based on the title of https://crbug.com/18383
const double kScaleFactor = 10;
WideString wsText;
int totalLength = nChars;
// Detect new lines and add clrf characters (since this is Windows only).
// These characters are removed by SkPDF, but the new line information is
// preserved in the text location. clrf characters seem to be ignored by
// label printers that use this driver.
if (m_SetOrigin &&
FXSYS_round(m_OriginY) != FXSYS_round(pObject2Device->f * kScaleFactor)) {
wsText += L"\r\n";
totalLength += 2;
}
m_OriginY = pObject2Device->f * kScaleFactor;
m_SetOrigin = true;
// Text
for (int i = 0; i < nChars; ++i) {
// Only works with PDFs from Skia's PDF generator. Cannot handle arbitrary
// values from PDFs.
const FXTEXT_CHARPOS& charpos = pCharPos[i];
ASSERT(charpos.m_AdjustMatrix[0] == 0);
ASSERT(charpos.m_AdjustMatrix[1] == 0);
ASSERT(charpos.m_AdjustMatrix[2] == 0);
ASSERT(charpos.m_AdjustMatrix[3] == 0);
ASSERT(charpos.m_Origin.y == 0);
wsText += charpos.m_Unicode;
}
size_t len = totalLength;
ByteString text = ByteString::FromUnicode(wsText);
while (len > 0) {
char buffer[1026];
size_t send_len = std::min(len, static_cast<size_t>(1024));
*(reinterpret_cast<uint16_t*>(buffer)) = send_len;
memcpy(buffer + 2, text.c_str(), send_len);
::GdiComment(m_hDC, send_len + 2, reinterpret_cast<const BYTE*>(buffer));
len -= send_len;
text.Right(len);
}
return true;
}
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