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// Copyright 2016 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 "core/fpdfapi/font/cpdf_type3char.h"
#include <utility>
#include "core/fpdfapi/page/cpdf_form.h"
#include "core/fpdfapi/page/cpdf_image.h"
#include "core/fpdfapi/page/cpdf_imageobject.h"
#include "core/fpdfapi/page/cpdf_pageobject.h"
#include "core/fxge/dib/cfx_dibitmap.h"
#include "core/fxge/fx_dib.h"
namespace {
constexpr float kTextUnitInGlyphUnit = 1000.0f;
} // namespace
CPDF_Type3Char::CPDF_Type3Char(std::unique_ptr<CPDF_Form> pForm)
: m_pForm(std::move(pForm)) {}
CPDF_Type3Char::~CPDF_Type3Char() {}
// static
float CPDF_Type3Char::TextUnitToGlyphUnit(float fTextUnit) {
return fTextUnit * kTextUnitInGlyphUnit;
}
// static
void CPDF_Type3Char::TextUnitRectToGlyphUnitRect(CFX_FloatRect* pRect) {
pRect->Scale(kTextUnitInGlyphUnit);
}
bool CPDF_Type3Char::LoadBitmap(CPDF_RenderContext* pContext) {
if (m_pBitmap || !m_pForm)
return true;
if (m_pForm->GetPageObjectList()->size() != 1 || m_bColored)
return false;
auto& pPageObj = m_pForm->GetPageObjectList()->front();
if (!pPageObj->IsImage())
return false;
m_ImageMatrix = pPageObj->AsImage()->matrix();
{
// |pSource| actually gets assigned a CPDF_DIBBase, which has pointers
// into objects owned by |m_pForm|. Make sure it is out of scope before
// clearing the form.
RetainPtr<CFX_DIBBase> pSource =
pPageObj->AsImage()->GetImage()->LoadDIBBase();
// Clone() is non-virtual, and can't be overloaded by CPDF_DIBBase to
// return a clone of the subclass as one would typically expect from a
// such a method. Instead, it only clones the CFX_DIBBase, none of whose
// members point to objects owned by the form. As a result, |m_pBitmap|
// may outlive |m_pForm|.
if (pSource)
m_pBitmap = pSource->Clone(nullptr);
}
m_pForm.reset();
return true;
}
void CPDF_Type3Char::InitializeFromStreamData(bool bColored,
const float* pData) {
m_bColored = bColored;
m_Width = FXSYS_round(TextUnitToGlyphUnit(pData[0]));
m_BBox.left = FXSYS_round(TextUnitToGlyphUnit(pData[2]));
m_BBox.bottom = FXSYS_round(TextUnitToGlyphUnit(pData[3]));
m_BBox.right = FXSYS_round(TextUnitToGlyphUnit(pData[4]));
m_BBox.top = FXSYS_round(TextUnitToGlyphUnit(pData[5]));
}
void CPDF_Type3Char::Transform(const CFX_Matrix& matrix) {
m_Width = m_Width * matrix.GetXUnit() + 0.5f;
CFX_FloatRect char_rect;
if (m_BBox.right <= m_BBox.left || m_BBox.bottom >= m_BBox.top) {
char_rect = form()->CalcBoundingBox();
TextUnitRectToGlyphUnitRect(&char_rect);
} else {
char_rect = CFX_FloatRect(m_BBox);
}
m_BBox = matrix.TransformRect(char_rect).ToRoundedFxRect();
}
void CPDF_Type3Char::ResetForm() {
m_pForm.reset();
}
RetainPtr<CFX_DIBitmap> CPDF_Type3Char::GetBitmap() {
return m_pBitmap;
}
const RetainPtr<CFX_DIBitmap>& CPDF_Type3Char::GetBitmap() const {
return m_pBitmap;
}
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