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-rw-r--r--core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp47
-rw-r--r--core/fpdfapi/edit/cpdf_pagecontentgenerator.h8
-rw-r--r--core/fpdfapi/edit/cpdf_pagecontentgenerator_unittest.cpp46
-rw-r--r--core/fpdfapi/page/cpdf_textobject.h1
4 files changed, 96 insertions, 6 deletions
diff --git a/core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp b/core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp
index 9de97ee718..4de89a47de 100644
--- a/core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp
+++ b/core/fpdfapi/edit/cpdf_pagecontentgenerator.cpp
@@ -9,12 +9,14 @@
#include <tuple>
#include <utility>
+#include "core/fpdfapi/font/cpdf_font.h"
#include "core/fpdfapi/page/cpdf_docpagedata.h"
#include "core/fpdfapi/page/cpdf_image.h"
#include "core/fpdfapi/page/cpdf_imageobject.h"
#include "core/fpdfapi/page/cpdf_page.h"
#include "core/fpdfapi/page/cpdf_path.h"
#include "core/fpdfapi/page/cpdf_pathobject.h"
+#include "core/fpdfapi/page/cpdf_textobject.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfapi/parser/cpdf_name.h"
@@ -63,6 +65,8 @@ void CPDF_PageContentGenerator::GenerateContent() {
ProcessImage(&buf, pImageObject);
else if (CPDF_PathObject* pPathObj = pPageObj->AsPath())
ProcessPath(&buf, pPathObj);
+ else if (CPDF_TextObject* pTextObj = pPageObj->AsText())
+ ProcessText(&buf, pTextObj);
}
CPDF_Dictionary* pPageDict = m_pPage->m_pFormDict;
CPDF_Object* pContent =
@@ -240,3 +244,46 @@ bool CPDF_PageContentGenerator::GraphicsData::operator<(
return fillAlpha < other.fillAlpha;
return strokeAlpha < other.strokeAlpha;
}
+
+bool CPDF_PageContentGenerator::FontData::operator<(
+ const FontData& other) const {
+ return baseFont < other.baseFont;
+}
+
+// This method adds text to the buffer, BT begins the text object, ET ends it.
+// Tm sets the text matrix (allows positioning and transforming text).
+// Tf sets the font name (from Font in Resources) and font size.
+// Tj sets the actual text, <####...> is used when specifying charcodes.
+void CPDF_PageContentGenerator::ProcessText(CFX_ByteTextBuf* buf,
+ CPDF_TextObject* pTextObj) {
+ // TODO(npm): Add support for something other than standard type1 fonts.
+ *buf << "BT " << pTextObj->GetTextMatrix() << " Tm ";
+ CPDF_Font* pFont = pTextObj->GetFont();
+ if (!pFont)
+ pFont = CPDF_Font::GetStockFont(m_pDocument, "Helvetica");
+ FontData fontD;
+ fontD.baseFont = pFont->GetBaseFont();
+ auto it = m_FontsMap.find(fontD);
+ CFX_ByteString dictName;
+ if (it != m_FontsMap.end()) {
+ dictName = it->second;
+ } else {
+ auto fontDict = pdfium::MakeUnique<CPDF_Dictionary>();
+ fontDict->SetNewFor<CPDF_Name>("Type", "Font");
+ fontDict->SetNewFor<CPDF_Name>("Subtype", "Type1");
+ fontDict->SetNewFor<CPDF_Name>("BaseFont", fontD.baseFont);
+ CPDF_Object* pDict = m_pDocument->AddIndirectObject(std::move(fontDict));
+ uint32_t dwObjNum = pDict->GetObjNum();
+ dictName = RealizeResource(dwObjNum, "Font");
+ m_FontsMap[fontD] = dictName;
+ }
+ *buf << "/" << PDF_NameEncode(dictName) << " " << pTextObj->GetFontSize()
+ << " Tf ";
+ CFX_ByteString text;
+ for (uint32_t charcode : pTextObj->m_CharCodes) {
+ if (charcode == CPDF_Font::kInvalidCharCode)
+ continue;
+ pFont->AppendChar(text, charcode);
+ }
+ *buf << PDF_EncodeString(text, true) << " Tj ET\n";
+}
diff --git a/core/fpdfapi/edit/cpdf_pagecontentgenerator.h b/core/fpdfapi/edit/cpdf_pagecontentgenerator.h
index e48ea4a7c9..fd80bd8f44 100644
--- a/core/fpdfapi/edit/cpdf_pagecontentgenerator.h
+++ b/core/fpdfapi/edit/cpdf_pagecontentgenerator.h
@@ -18,6 +18,7 @@ class CPDF_ImageObject;
class CPDF_Page;
class CPDF_PageObject;
class CPDF_PathObject;
+class CPDF_TextObject;
class CPDF_PageContentGenerator {
public:
@@ -32,6 +33,7 @@ class CPDF_PageContentGenerator {
void ProcessPath(CFX_ByteTextBuf* buf, CPDF_PathObject* pPathObj);
void ProcessImage(CFX_ByteTextBuf* buf, CPDF_ImageObject* pImageObj);
void ProcessGraphics(CFX_ByteTextBuf* buf, CPDF_PageObject* pPageObj);
+ void ProcessText(CFX_ByteTextBuf* buf, CPDF_TextObject* pTextObj);
CFX_ByteString RealizeResource(uint32_t dwResourceObjNum,
const CFX_ByteString& bsType);
@@ -41,7 +43,13 @@ class CPDF_PageContentGenerator {
bool operator<(const GraphicsData& other) const;
};
+ struct FontData {
+ CFX_ByteString baseFont;
+ bool operator<(const FontData& other) const;
+ };
+
std::map<GraphicsData, CFX_ByteString> m_GraphicsMap;
+ std::map<FontData, CFX_ByteString> m_FontsMap;
CPDF_Page* const m_pPage;
CPDF_Document* const m_pDocument;
std::vector<CPDF_PageObject*> m_pageObjects;
diff --git a/core/fpdfapi/edit/cpdf_pagecontentgenerator_unittest.cpp b/core/fpdfapi/edit/cpdf_pagecontentgenerator_unittest.cpp
index 4846b1bd3c..0a636a1888 100644
--- a/core/fpdfapi/edit/cpdf_pagecontentgenerator_unittest.cpp
+++ b/core/fpdfapi/edit/cpdf_pagecontentgenerator_unittest.cpp
@@ -5,8 +5,10 @@
#include "core/fpdfapi/edit/cpdf_pagecontentgenerator.h"
#include "core/fpdfapi/cpdf_modulemgr.h"
+#include "core/fpdfapi/font/cpdf_font.h"
#include "core/fpdfapi/page/cpdf_page.h"
#include "core/fpdfapi/page/cpdf_pathobject.h"
+#include "core/fpdfapi/page/cpdf_textobject.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfapi/parser/cpdf_parser.h"
#include "testing/gtest/include/gtest/gtest.h"
@@ -24,10 +26,16 @@ class CPDF_PageContentGeneratorTest : public testing::Test {
pGen->ProcessPath(buf, pPathObj);
}
- CPDF_Dictionary* TestGetGS(CPDF_PageContentGenerator* pGen,
- const CFX_ByteString& name) {
- return pGen->m_pPage->m_pResources->GetDictFor("ExtGState")
- ->GetDictFor(name);
+ CPDF_Dictionary* TestGetResource(CPDF_PageContentGenerator* pGen,
+ const CFX_ByteString& type,
+ const CFX_ByteString& name) {
+ return pGen->m_pPage->m_pResources->GetDictFor(type)->GetDictFor(name);
+ }
+
+ void TestProcessText(CPDF_PageContentGenerator* pGen,
+ CFX_ByteTextBuf* buf,
+ CPDF_TextObject* pTextObj) {
+ pGen->ProcessText(buf, pTextObj);
}
};
@@ -162,8 +170,8 @@ TEST_F(CPDF_PageContentGeneratorTest, ProcessGraphics) {
pathString.Left(48));
EXPECT_EQ(" gs 1 2 m 3 4 l 5 6 l h B Q\n", pathString.Right(28));
ASSERT_TRUE(pathString.GetLength() > 76);
- CPDF_Dictionary* externalGS =
- TestGetGS(&generator, pathString.Mid(48, pathString.GetLength() - 76));
+ CPDF_Dictionary* externalGS = TestGetResource(
+ &generator, "ExtGState", pathString.Mid(48, pathString.GetLength() - 76));
ASSERT_TRUE(externalGS);
EXPECT_EQ(0.5f, externalGS->GetNumberFor("ca"));
EXPECT_EQ(0.8f, externalGS->GetNumberFor("CA"));
@@ -181,3 +189,29 @@ TEST_F(CPDF_PageContentGeneratorTest, ProcessGraphics) {
EXPECT_EQ(pathString.Mid(48, pathString.GetLength() - 76),
pathString2.Mid(55, pathString2.GetLength() - 83));
}
+
+TEST_F(CPDF_PageContentGeneratorTest, ProcessText) {
+ auto pDoc = pdfium::MakeUnique<CPDF_Document>(nullptr);
+ pDoc->CreateNewDoc();
+ CPDF_Dictionary* pPageDict = pDoc->CreateNewPage(0);
+ auto pTestPage = pdfium::MakeUnique<CPDF_Page>(pDoc.get(), pPageDict, false);
+ CPDF_PageContentGenerator generator(pTestPage.get());
+ auto pTextObj = pdfium::MakeUnique<CPDF_TextObject>();
+ CPDF_Font* pFont = CPDF_Font::GetStockFont(pDoc.get(), "Times-Roman");
+ pTextObj->m_TextState.SetFont(pFont);
+ pTextObj->m_TextState.SetFontSize(10.0f);
+ pTextObj->Transform(CFX_Matrix(1, 0, 0, 1, 100, 100));
+ pTextObj->SetText("Hello World");
+ CFX_ByteTextBuf buf;
+ TestProcessText(&generator, &buf, pTextObj.get());
+ CFX_ByteString textString = buf.MakeString();
+ EXPECT_LT(61, textString.GetLength());
+ EXPECT_EQ("BT 1 0 0 1 100 100 Tm /", textString.Left(23));
+ EXPECT_EQ(" 10 Tf <48656C6C6F20576F726C64> Tj ET\n", textString.Right(38));
+ CPDF_Dictionary* fontDict = TestGetResource(
+ &generator, "Font", textString.Mid(23, textString.GetLength() - 61));
+ ASSERT_TRUE(fontDict);
+ EXPECT_EQ("Font", fontDict->GetStringFor("Type"));
+ EXPECT_EQ("Type1", fontDict->GetStringFor("Subtype"));
+ EXPECT_EQ("Times-Roman", fontDict->GetStringFor("BaseFont"));
+}
diff --git a/core/fpdfapi/page/cpdf_textobject.h b/core/fpdfapi/page/cpdf_textobject.h
index bef1b1ebc4..07a2aabbe2 100644
--- a/core/fpdfapi/page/cpdf_textobject.h
+++ b/core/fpdfapi/page/cpdf_textobject.h
@@ -54,6 +54,7 @@ class CPDF_TextObject : public CPDF_PageObject {
friend class CPDF_RenderStatus;
friend class CPDF_StreamContentParser;
friend class CPDF_TextRenderer;
+ friend class CPDF_PageContentGenerator;
void SetSegments(const CFX_ByteString* pStrs,
const FX_FLOAT* pKerning,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 03:02:36 +0000