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authorDan Sinclair <dsinclair@chromium.org>2018-03-22 16:21:04 +0000
committerChromium commit bot <commit-bot@chromium.org>2018-03-22 16:21:04 +0000
commitcb8768294337f42484b418141792f924d836f9d7 (patch)
tree1f38478ef41d7f670a48267d4fbac46bff3ce8d8 /samples/pdfium_test_write_helper.cc
parent0f494c86440debd22449acd9743382ba14c7a805 (diff)
downloadpdfium-cb8768294337f42484b418141792f924d836f9d7.tar.xz
Move helper methods out of pdfium_test.
This CL splits some helper code out of pdfium_test into individual files. This makes it a bit clearer what each chunk of code is doing and makes pdfium_test easier to read. Change-Id: I3dcff5a6a85ac4283336108eb3a24fa5f234284c Reviewed-on: https://pdfium-review.googlesource.com/28990 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
Diffstat (limited to 'samples/pdfium_test_write_helper.cc')
-rw-r--r--samples/pdfium_test_write_helper.cc644
1 files changed, 644 insertions, 0 deletions
diff --git a/samples/pdfium_test_write_helper.cc b/samples/pdfium_test_write_helper.cc
new file mode 100644
index 0000000000..27f43a64c4
--- /dev/null
+++ b/samples/pdfium_test_write_helper.cc
@@ -0,0 +1,644 @@
+// Copyright 2018 The 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.
+
+#include "samples/pdfium_test_write_helper.h"
+
+#include "public/cpp/fpdf_deleters.h"
+#include "public/fpdf_annot.h"
+#include "public/fpdf_attachment.h"
+#include "public/fpdf_edit.h"
+#include "testing/image_diff/image_diff_png.h"
+#include "testing/test_support.h"
+#include "third_party/base/logging.h"
+
+namespace {
+
+bool CheckDimensions(int stride, int width, int height) {
+ if (stride < 0 || width < 0 || height < 0)
+ return false;
+ if (height > 0 && width > INT_MAX / height)
+ return false;
+ return true;
+}
+
+const char* AnnotSubtypeToCString(FPDF_ANNOTATION_SUBTYPE subtype) {
+ if (subtype == FPDF_ANNOT_TEXT)
+ return "Text";
+ if (subtype == FPDF_ANNOT_LINK)
+ return "Link";
+ if (subtype == FPDF_ANNOT_FREETEXT)
+ return "FreeText";
+ if (subtype == FPDF_ANNOT_LINE)
+ return "Line";
+ if (subtype == FPDF_ANNOT_SQUARE)
+ return "Square";
+ if (subtype == FPDF_ANNOT_CIRCLE)
+ return "Circle";
+ if (subtype == FPDF_ANNOT_POLYGON)
+ return "Polygon";
+ if (subtype == FPDF_ANNOT_POLYLINE)
+ return "PolyLine";
+ if (subtype == FPDF_ANNOT_HIGHLIGHT)
+ return "Highlight";
+ if (subtype == FPDF_ANNOT_UNDERLINE)
+ return "Underline";
+ if (subtype == FPDF_ANNOT_SQUIGGLY)
+ return "Squiggly";
+ if (subtype == FPDF_ANNOT_STRIKEOUT)
+ return "StrikeOut";
+ if (subtype == FPDF_ANNOT_STAMP)
+ return "Stamp";
+ if (subtype == FPDF_ANNOT_CARET)
+ return "Caret";
+ if (subtype == FPDF_ANNOT_INK)
+ return "Ink";
+ if (subtype == FPDF_ANNOT_POPUP)
+ return "Popup";
+ if (subtype == FPDF_ANNOT_FILEATTACHMENT)
+ return "FileAttachment";
+ if (subtype == FPDF_ANNOT_SOUND)
+ return "Sound";
+ if (subtype == FPDF_ANNOT_MOVIE)
+ return "Movie";
+ if (subtype == FPDF_ANNOT_WIDGET)
+ return "Widget";
+ if (subtype == FPDF_ANNOT_SCREEN)
+ return "Screen";
+ if (subtype == FPDF_ANNOT_PRINTERMARK)
+ return "PrinterMark";
+ if (subtype == FPDF_ANNOT_TRAPNET)
+ return "TrapNet";
+ if (subtype == FPDF_ANNOT_WATERMARK)
+ return "Watermark";
+ if (subtype == FPDF_ANNOT_THREED)
+ return "3D";
+ if (subtype == FPDF_ANNOT_RICHMEDIA)
+ return "RichMedia";
+ if (subtype == FPDF_ANNOT_XFAWIDGET)
+ return "XFAWidget";
+ NOTREACHED();
+ return "";
+}
+
+void AppendFlagString(const char* flag, std::string* output) {
+ if (!output->empty())
+ *output += ", ";
+ *output += flag;
+}
+
+std::string AnnotFlagsToString(int flags) {
+ std::string str;
+ if (flags & FPDF_ANNOT_FLAG_INVISIBLE)
+ AppendFlagString("Invisible", &str);
+ if (flags & FPDF_ANNOT_FLAG_HIDDEN)
+ AppendFlagString("Hidden", &str);
+ if (flags & FPDF_ANNOT_FLAG_PRINT)
+ AppendFlagString("Print", &str);
+ if (flags & FPDF_ANNOT_FLAG_NOZOOM)
+ AppendFlagString("NoZoom", &str);
+ if (flags & FPDF_ANNOT_FLAG_NOROTATE)
+ AppendFlagString("NoRotate", &str);
+ if (flags & FPDF_ANNOT_FLAG_NOVIEW)
+ AppendFlagString("NoView", &str);
+ if (flags & FPDF_ANNOT_FLAG_READONLY)
+ AppendFlagString("ReadOnly", &str);
+ if (flags & FPDF_ANNOT_FLAG_LOCKED)
+ AppendFlagString("Locked", &str);
+ if (flags & FPDF_ANNOT_FLAG_TOGGLENOVIEW)
+ AppendFlagString("ToggleNoView", &str);
+ return str;
+}
+
+const char* PageObjectTypeToCString(int type) {
+ if (type == FPDF_PAGEOBJ_TEXT)
+ return "Text";
+ if (type == FPDF_PAGEOBJ_PATH)
+ return "Path";
+ if (type == FPDF_PAGEOBJ_IMAGE)
+ return "Image";
+ if (type == FPDF_PAGEOBJ_SHADING)
+ return "Shading";
+ if (type == FPDF_PAGEOBJ_FORM)
+ return "Form";
+ NOTREACHED();
+ return "";
+}
+
+#ifdef _WIN32
+int CALLBACK EnhMetaFileProc(HDC hdc,
+ HANDLETABLE* handle_table,
+ const ENHMETARECORD* record,
+ int objects_count,
+ LPARAM param) {
+ std::vector<const ENHMETARECORD*>& items =
+ *reinterpret_cast<std::vector<const ENHMETARECORD*>*>(param);
+ items.push_back(record);
+ return 1;
+}
+#endif // _WIN32
+
+} // namespace
+
+std::string WritePpm(const char* pdf_name,
+ int num,
+ const void* buffer_void,
+ int stride,
+ int width,
+ int height) {
+ const auto* buffer = reinterpret_cast<const char*>(buffer_void);
+
+ if (!CheckDimensions(stride, width, height))
+ return "";
+
+ int out_len = width * height;
+ if (out_len > INT_MAX / 3)
+ return "";
+
+ out_len *= 3;
+
+ char filename[256];
+ snprintf(filename, sizeof(filename), "%s.%d.ppm", pdf_name, num);
+ FILE* fp = fopen(filename, "wb");
+ if (!fp)
+ return "";
+
+ fprintf(fp, "P6\n# PDF test render\n%d %d\n255\n", width, height);
+ // Source data is B, G, R, unused.
+ // Dest data is R, G, B.
+ std::vector<char> result(out_len);
+ for (int h = 0; h < height; ++h) {
+ const char* src_line = buffer + (stride * h);
+ char* dest_line = result.data() + (width * h * 3);
+ for (int w = 0; w < width; ++w) {
+ // R
+ dest_line[w * 3] = src_line[(w * 4) + 2];
+ // G
+ dest_line[(w * 3) + 1] = src_line[(w * 4) + 1];
+ // B
+ dest_line[(w * 3) + 2] = src_line[w * 4];
+ }
+ }
+ if (fwrite(result.data(), out_len, 1, fp) != 1)
+ fprintf(stderr, "Failed to write to %s\n", filename);
+
+ fclose(fp);
+ return std::string(filename);
+}
+
+void WriteText(FPDF_PAGE page, const char* pdf_name, int num) {
+ char filename[256];
+ int chars_formatted =
+ snprintf(filename, sizeof(filename), "%s.%d.txt", pdf_name, num);
+ if (chars_formatted < 0 ||
+ static_cast<size_t>(chars_formatted) >= sizeof(filename)) {
+ fprintf(stderr, "Filename %s is too long\n", filename);
+ return;
+ }
+
+ FILE* fp = fopen(filename, "w");
+ if (!fp) {
+ fprintf(stderr, "Failed to open %s for output\n", filename);
+ return;
+ }
+
+ // Output in UTF32-LE.
+ uint32_t bom = 0x0000FEFF;
+ if (fwrite(&bom, sizeof(bom), 1, fp) != 1) {
+ fprintf(stderr, "Failed to write to %s\n", filename);
+ (void)fclose(fp);
+ return;
+ }
+
+ std::unique_ptr<void, FPDFTextPageDeleter> textpage(FPDFText_LoadPage(page));
+ for (int i = 0; i < FPDFText_CountChars(textpage.get()); i++) {
+ uint32_t c = FPDFText_GetUnicode(textpage.get(), i);
+ if (fwrite(&c, sizeof(c), 1, fp) != 1) {
+ fprintf(stderr, "Failed to write to %s\n", filename);
+ break;
+ }
+ }
+ (void)fclose(fp);
+}
+
+void WriteAnnot(FPDF_PAGE page, const char* pdf_name, int num) {
+ // Open the output text file.
+ char filename[256];
+ int chars_formatted =
+ snprintf(filename, sizeof(filename), "%s.%d.annot.txt", pdf_name, num);
+ if (chars_formatted < 0 ||
+ static_cast<size_t>(chars_formatted) >= sizeof(filename)) {
+ fprintf(stderr, "Filename %s is too long\n", filename);
+ return;
+ }
+
+ FILE* fp = fopen(filename, "w");
+ if (!fp) {
+ fprintf(stderr, "Failed to open %s for output\n", filename);
+ return;
+ }
+
+ int annot_count = FPDFPage_GetAnnotCount(page);
+ fprintf(fp, "Number of annotations: %d\n\n", annot_count);
+
+ // Iterate through all annotations on this page.
+ for (int i = 0; i < annot_count; ++i) {
+ // Retrieve the annotation object and its subtype.
+ fprintf(fp, "Annotation #%d:\n", i + 1);
+ std::unique_ptr<void, FPDFAnnotationDeleter> annot(
+ FPDFPage_GetAnnot(page, i));
+ if (!annot) {
+ fprintf(fp, "Failed to retrieve annotation!\n\n");
+ continue;
+ }
+
+ FPDF_ANNOTATION_SUBTYPE subtype = FPDFAnnot_GetSubtype(annot.get());
+ fprintf(fp, "Subtype: %s\n", AnnotSubtypeToCString(subtype));
+
+ // Retrieve the annotation flags.
+ fprintf(fp, "Flags set: %s\n",
+ AnnotFlagsToString(FPDFAnnot_GetFlags(annot.get())).c_str());
+
+ // Retrieve the annotation's object count and object types.
+ const int obj_count = FPDFAnnot_GetObjectCount(annot.get());
+ fprintf(fp, "Number of objects: %d\n", obj_count);
+ if (obj_count > 0) {
+ fprintf(fp, "Object types: ");
+ for (int j = 0; j < obj_count; ++j) {
+ const char* type = PageObjectTypeToCString(
+ FPDFPageObj_GetType(FPDFAnnot_GetObject(annot.get(), j)));
+ fprintf(fp, "%s ", type);
+ }
+ fprintf(fp, "\n");
+ }
+
+ // Retrieve the annotation's color and interior color.
+ unsigned int R;
+ unsigned int G;
+ unsigned int B;
+ unsigned int A;
+ if (FPDFAnnot_GetColor(annot.get(), FPDFANNOT_COLORTYPE_Color, &R, &G, &B,
+ &A)) {
+ fprintf(fp, "Color in RGBA: %d %d %d %d\n", R, G, B, A);
+ } else {
+ fprintf(fp, "Failed to retrieve color.\n");
+ }
+ if (FPDFAnnot_GetColor(annot.get(), FPDFANNOT_COLORTYPE_InteriorColor, &R,
+ &G, &B, &A)) {
+ fprintf(fp, "Interior color in RGBA: %d %d %d %d\n", R, G, B, A);
+ } else {
+ fprintf(fp, "Failed to retrieve interior color.\n");
+ }
+
+ // Retrieve the annotation's contents and author.
+ static constexpr char kContentsKey[] = "Contents";
+ static constexpr char kAuthorKey[] = "T";
+ unsigned long len =
+ FPDFAnnot_GetStringValue(annot.get(), kContentsKey, nullptr, 0);
+ std::vector<char> buf(len);
+ FPDFAnnot_GetStringValue(annot.get(), kContentsKey, buf.data(), len);
+ fprintf(fp, "Content: %ls\n",
+ GetPlatformWString(reinterpret_cast<unsigned short*>(buf.data()))
+ .c_str());
+ len = FPDFAnnot_GetStringValue(annot.get(), kAuthorKey, nullptr, 0);
+ buf.clear();
+ buf.resize(len);
+ FPDFAnnot_GetStringValue(annot.get(), kAuthorKey, buf.data(), len);
+ fprintf(fp, "Author: %ls\n",
+ GetPlatformWString(reinterpret_cast<unsigned short*>(buf.data()))
+ .c_str());
+
+ // Retrieve the annotation's quadpoints if it is a markup annotation.
+ if (FPDFAnnot_HasAttachmentPoints(annot.get())) {
+ FS_QUADPOINTSF quadpoints;
+ if (FPDFAnnot_GetAttachmentPoints(annot.get(), &quadpoints)) {
+ fprintf(fp,
+ "Quadpoints: (%.3f, %.3f), (%.3f, %.3f), (%.3f, %.3f), (%.3f, "
+ "%.3f)\n",
+ quadpoints.x1, quadpoints.y1, quadpoints.x2, quadpoints.y2,
+ quadpoints.x3, quadpoints.y3, quadpoints.x4, quadpoints.y4);
+ } else {
+ fprintf(fp, "Failed to retrieve quadpoints.\n");
+ }
+ }
+
+ // Retrieve the annotation's rectangle coordinates.
+ FS_RECTF rect;
+ if (FPDFAnnot_GetRect(annot.get(), &rect)) {
+ fprintf(fp, "Rectangle: l - %.3f, b - %.3f, r - %.3f, t - %.3f\n\n",
+ rect.left, rect.bottom, rect.right, rect.top);
+ } else {
+ fprintf(fp, "Failed to retrieve annotation rectangle.\n");
+ }
+ }
+
+ (void)fclose(fp);
+}
+
+std::string WritePng(const char* pdf_name,
+ int num,
+ const void* buffer_void,
+ int stride,
+ int width,
+ int height) {
+ if (!CheckDimensions(stride, width, height))
+ return "";
+
+ std::vector<unsigned char> png_encoding;
+ const auto* buffer = static_cast<const unsigned char*>(buffer_void);
+ if (!image_diff_png::EncodeBGRAPNG(buffer, width, height, stride, false,
+ &png_encoding)) {
+ fprintf(stderr, "Failed to convert bitmap to PNG\n");
+ return "";
+ }
+
+ char filename[256];
+ int chars_formatted =
+ snprintf(filename, sizeof(filename), "%s.%d.png", pdf_name, num);
+ if (chars_formatted < 0 ||
+ static_cast<size_t>(chars_formatted) >= sizeof(filename)) {
+ fprintf(stderr, "Filename %s is too long\n", filename);
+ return "";
+ }
+
+ FILE* fp = fopen(filename, "wb");
+ if (!fp) {
+ fprintf(stderr, "Failed to open %s for output\n", filename);
+ return "";
+ }
+
+ size_t bytes_written =
+ fwrite(&png_encoding.front(), 1, png_encoding.size(), fp);
+ if (bytes_written != png_encoding.size())
+ fprintf(stderr, "Failed to write to %s\n", filename);
+
+ (void)fclose(fp);
+ return std::string(filename);
+}
+
+#ifdef _WIN32
+std::string WriteBmp(const char* pdf_name,
+ int num,
+ const void* buffer,
+ int stride,
+ int width,
+ int height) {
+ if (!CheckDimensions(stride, width, height))
+ return "";
+
+ int out_len = stride * height;
+ if (out_len > INT_MAX / 3)
+ return "";
+
+ char filename[256];
+ snprintf(filename, sizeof(filename), "%s.%d.bmp", pdf_name, num);
+ FILE* fp = fopen(filename, "wb");
+ if (!fp)
+ return "";
+
+ BITMAPINFO bmi = {};
+ bmi.bmiHeader.biSize = sizeof(bmi) - sizeof(RGBQUAD);
+ bmi.bmiHeader.biWidth = width;
+ bmi.bmiHeader.biHeight = -height; // top-down image
+ bmi.bmiHeader.biPlanes = 1;
+ bmi.bmiHeader.biBitCount = 32;
+ bmi.bmiHeader.biCompression = BI_RGB;
+ bmi.bmiHeader.biSizeImage = 0;
+
+ BITMAPFILEHEADER file_header = {};
+ file_header.bfType = 0x4d42;
+ file_header.bfSize = sizeof(file_header) + bmi.bmiHeader.biSize + out_len;
+ file_header.bfOffBits = file_header.bfSize - out_len;
+
+ if (fwrite(&file_header, sizeof(file_header), 1, fp) != 1 ||
+ fwrite(&bmi, bmi.bmiHeader.biSize, 1, fp) != 1 ||
+ fwrite(buffer, out_len, 1, fp) != 1) {
+ fprintf(stderr, "Failed to write to %s\n", filename);
+ }
+ fclose(fp);
+ return std::string(filename);
+}
+
+void WriteEmf(FPDF_PAGE page, const char* pdf_name, int num) {
+ char filename[256];
+ snprintf(filename, sizeof(filename), "%s.%d.emf", pdf_name, num);
+
+ HDC dc = CreateEnhMetaFileA(nullptr, filename, nullptr, nullptr);
+
+ int width = static_cast<int>(FPDF_GetPageWidth(page));
+ int height = static_cast<int>(FPDF_GetPageHeight(page));
+ HRGN rgn = CreateRectRgn(0, 0, width, height);
+ SelectClipRgn(dc, rgn);
+ DeleteObject(rgn);
+
+ SelectObject(dc, GetStockObject(NULL_PEN));
+ SelectObject(dc, GetStockObject(WHITE_BRUSH));
+ // If a PS_NULL pen is used, the dimensions of the rectangle are 1 pixel less.
+ Rectangle(dc, 0, 0, width + 1, height + 1);
+
+ FPDF_RenderPage(dc, page, 0, 0, width, height, 0,
+ FPDF_ANNOT | FPDF_PRINTING | FPDF_NO_CATCH);
+
+ DeleteEnhMetaFile(CloseEnhMetaFile(dc));
+}
+
+void WritePS(FPDF_PAGE page, const char* pdf_name, int num) {
+ char filename[256];
+ snprintf(filename, sizeof(filename), "%s.%d.ps", pdf_name, num);
+ FILE* fp = fopen(filename, "wb");
+ if (!fp)
+ return;
+
+ HDC dc = CreateEnhMetaFileA(nullptr, nullptr, nullptr, nullptr);
+
+ int width = static_cast<int>(FPDF_GetPageWidth(page));
+ int height = static_cast<int>(FPDF_GetPageHeight(page));
+ FPDF_RenderPage(dc, page, 0, 0, width, height, 0,
+ FPDF_ANNOT | FPDF_PRINTING | FPDF_NO_CATCH);
+
+ HENHMETAFILE emf = CloseEnhMetaFile(dc);
+ std::vector<const ENHMETARECORD*> items;
+ EnumEnhMetaFile(nullptr, emf, &EnhMetaFileProc, &items, nullptr);
+ for (const ENHMETARECORD* record : items) {
+ if (record->iType != EMR_GDICOMMENT)
+ continue;
+
+ const auto* comment = reinterpret_cast<const EMRGDICOMMENT*>(record);
+ const char* data = reinterpret_cast<const char*>(comment->Data);
+ uint16_t size = *reinterpret_cast<const uint16_t*>(data);
+ if (fwrite(data + sizeof(uint16_t), size, 1, fp) != 1) {
+ fprintf(stderr, "Failed to write to %s\n", filename);
+ break;
+ }
+ }
+ fclose(fp);
+ DeleteEnhMetaFile(emf);
+}
+#endif // _WIN32
+
+#ifdef PDF_ENABLE_SKIA
+std::string WriteSkp(const char* pdf_name,
+ int num,
+ SkPictureRecorder* recorder) {
+ char filename[256];
+ int chars_formatted =
+ snprintf(filename, sizeof(filename), "%s.%d.skp", pdf_name, num);
+
+ if (chars_formatted < 0 ||
+ static_cast<size_t>(chars_formatted) >= sizeof(filename)) {
+ fprintf(stderr, "Filename %s is too long\n", filename);
+ return "";
+ }
+
+ sk_sp<SkPicture> picture(recorder->finishRecordingAsPicture());
+ SkFILEWStream wStream(filename);
+ picture->serialize(&wStream);
+ return std::string(filename);
+}
+#endif
+
+void WriteAttachments(FPDF_DOCUMENT doc, const std::string& name) {
+ for (int i = 0; i < FPDFDoc_GetAttachmentCount(doc); ++i) {
+ FPDF_ATTACHMENT attachment = FPDFDoc_GetAttachment(doc, i);
+
+ // Retrieve the attachment file name.
+ std::string attachment_name;
+ unsigned long len = FPDFAttachment_GetName(attachment, nullptr, 0);
+ if (len) {
+ std::vector<char> buf(len);
+ unsigned long actual_len =
+ FPDFAttachment_GetName(attachment, buf.data(), len);
+ if (actual_len == len) {
+ attachment_name =
+ GetPlatformString(reinterpret_cast<unsigned short*>(buf.data()));
+ }
+ }
+ if (attachment_name.empty()) {
+ fprintf(stderr, "Attachment #%d has an empty file name.\n", i + 1);
+ continue;
+ }
+
+ // Calculate the full attachment file name.
+ char save_name[256];
+ int chars_formatted =
+ snprintf(save_name, sizeof(save_name), "%s.attachment.%s", name.c_str(),
+ attachment_name.c_str());
+ if (chars_formatted < 0 ||
+ static_cast<size_t>(chars_formatted) >= sizeof(save_name)) {
+ fprintf(stderr, "Filename %s is too long\n", save_name);
+ continue;
+ }
+
+ // Retrieve the attachment.
+ len = FPDFAttachment_GetFile(attachment, nullptr, 0);
+ std::vector<char> data_buf(len);
+ if (len) {
+ unsigned long actual_len =
+ FPDFAttachment_GetFile(attachment, data_buf.data(), len);
+ if (actual_len != len)
+ data_buf.clear();
+ }
+ if (data_buf.empty()) {
+ fprintf(stderr, "Attachment \"%s\" is empty.\n", attachment_name.c_str());
+ continue;
+ }
+
+ // Write the attachment file.
+ FILE* fp = fopen(save_name, "wb");
+ if (!fp) {
+ fprintf(stderr, "Failed to open %s for saving attachment.\n", save_name);
+ continue;
+ }
+
+ size_t written_len = fwrite(data_buf.data(), 1, len, fp);
+ if (written_len == len) {
+ fprintf(stderr, "Saved attachment \"%s\" as: %s.\n",
+ attachment_name.c_str(), save_name);
+ } else {
+ fprintf(stderr, "Failed to write to %s\n", save_name);
+ }
+ fclose(fp);
+ }
+}
+
+void WriteImages(FPDF_PAGE page, const char* pdf_name, int page_num) {
+ for (int i = 0; i < FPDFPage_CountObjects(page); ++i) {
+ FPDF_PAGEOBJECT obj = FPDFPage_GetObject(page, i);
+ if (FPDFPageObj_GetType(obj) != FPDF_PAGEOBJ_IMAGE)
+ continue;
+
+ std::unique_ptr<void, FPDFBitmapDeleter> bitmap(
+ FPDFImageObj_GetBitmap(obj));
+ if (!bitmap) {
+ fprintf(stderr, "Image object #%d on page #%d has an empty bitmap.\n",
+ i + 1, page_num + 1);
+ continue;
+ }
+
+ int format = FPDFBitmap_GetFormat(bitmap.get());
+ if (format == FPDFBitmap_Unknown) {
+ fprintf(stderr,
+ "Image object #%d on page #%d has a bitmap of unknown format.\n",
+ i + 1, page_num + 1);
+ continue;
+ }
+
+ std::vector<unsigned char> png_encoding;
+ const unsigned char* buffer =
+ static_cast<const unsigned char*>(FPDFBitmap_GetBuffer(bitmap.get()));
+ int width = FPDFBitmap_GetWidth(bitmap.get());
+ int height = FPDFBitmap_GetHeight(bitmap.get());
+ int stride = FPDFBitmap_GetStride(bitmap.get());
+ bool ret = false;
+ switch (format) {
+ case FPDFBitmap_Gray:
+ ret = image_diff_png::EncodeGrayPNG(buffer, width, height, stride,
+ &png_encoding);
+ break;
+ case FPDFBitmap_BGR:
+ ret = image_diff_png::EncodeBGRPNG(buffer, width, height, stride,
+ &png_encoding);
+ break;
+ case FPDFBitmap_BGRx:
+ ret = image_diff_png::EncodeBGRAPNG(buffer, width, height, stride, true,
+ &png_encoding);
+ break;
+ case FPDFBitmap_BGRA:
+ ret = image_diff_png::EncodeBGRAPNG(buffer, width, height, stride,
+ false, &png_encoding);
+ break;
+ default:
+ NOTREACHED();
+ }
+ if (!ret) {
+ fprintf(stderr,
+ "Failed to convert image object #%d on page #%d to png.\n", i + 1,
+ page_num + 1);
+ continue;
+ }
+
+ char filename[256];
+ int chars_formatted = snprintf(filename, sizeof(filename), "%s.%d.%d.png",
+ pdf_name, page_num, i);
+ if (chars_formatted < 0 ||
+ static_cast<size_t>(chars_formatted) >= sizeof(filename)) {
+ fprintf(stderr, "Filename %s for saving image is too long\n", filename);
+ continue;
+ }
+
+ FILE* fp = fopen(filename, "wb");
+ if (!fp) {
+ fprintf(stderr, "Failed to open %s for saving image.\n", filename);
+ continue;
+ }
+
+ size_t bytes_written =
+ fwrite(&png_encoding.front(), 1, png_encoding.size(), fp);
+ if (bytes_written != png_encoding.size())
+ fprintf(stderr, "Failed to write to %s.\n", filename);
+ else
+ fprintf(stderr, "Successfully wrote embedded image %s.\n", filename);
+
+ (void)fclose(fp);
+ }
+}