mirror/tesseract
1
0
Fork 0
mirror of https://github.com/tesseract-ocr/tesseract.git synced 2025-01-18 06:30:14 +08:00
Code Issues Actions 10 Packages Projects Releases Wiki Activity

Jeff's fixes to pdf rendering

Browse Source
This commit is contained in:
Ray Smith 2017-04-28 13:38:13 -07:00
parent 13b7900ebf
commit 77015526fa
1 changed files with 8 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
api/pdfrenderer.cpp
View File

@ -159,7 +159,7 @@ CIDToGIDMap.
OK there is a small problem there, if I use GID 0 then Acrobat gets
upset about it and complains it cannot extract the font. If I set the
CIDToGIDMap so that all the entries are 1 instead, its happy. Totally
CIDToGIDMap so that all the entries are 1 instead, it's happy. Totally
mad......
*/
@ -169,15 +169,15 @@ namespace tesseract {
// Use for PDF object fragments. Must be large enough
// to hold a colormap with 256 colors in the verbose
// PDF representation.
const int kBasicBufSize = 2048;
static const int kBasicBufSize = 2048;
// If the font is 10 pts, nominal character width is 5 pts
const int kCharWidth = 2;
static const int kCharWidth = 2;
// Used for memory allocation. A codepoint must take no more than this
// many bytes, when written in the PDF way. e.g. "<0063>" for the
// letter 'c'
const int kMaxBytesPerCodepoint = 20;
static const int kMaxBytesPerCodepoint = 20;
/**********************************************************************
* PDF Renderer interface implementation
@ -309,18 +309,19 @@ void ClipBaseline(int ppi, int x1, int y1, int x2, int y2,
*line_y1 = *line_y2 = (y1 + y2) / 2;
}
bool CodepointToUtf16be(int code, char *utf16) {
bool CodepointToUtf16be(int code, char utf16[kMaxBytesPerCodepoint]) {
if ((code > 0xD7FF && code < 0xE000) || code > 0x10FFFF) {
tprintf("Dropping invalid codepoint %d\n", code);
return false;
}
if (code < 0x10000) {
snprintf(utf16, sizeof(utf16), "%04X", code);
snprintf(utf16, kMaxBytesPerCodepoint, "%04X", code);
} else {
int a = code - 0x010000;
int high_surrogate = (0x03FF & (a >> 10)) + 0xD800;
int low_surrogate = (0x03FF & a) + 0xDC00;
snprintf(utf16, sizeof(utf16), "%04X%04X", high_surrogate, low_surrogate);
snprintf(utf16, kMaxBytesPerCodepoint,
"%04X%04X", high_surrogate, low_surrogate);
}
return true;
}