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Fixed issue #1681.

This commit is contained in:
Бранимир Караџић 2019-03-08 07:53:15 -08:00
parent a6bdbd4a03
commit ac8a686f6e
4 changed files with 34 additions and 213 deletions
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9
examples/11-fontsdf/fontsdf.cpp
View File

@ -73,7 +73,9 @@ public:
// Imgui.
imguiCreate();
m_bigText = (char*)load("text/sherlock_holmes_a_scandal_in_bohemia_arthur_conan_doyle.txt");
uint32_t size;
m_txtFile = load("text/sherlock_holmes_a_scandal_in_bohemia_arthur_conan_doyle.txt", &size);
m_bigText = bx::StringView( (const char*)m_txtFile, size);
// Init the text rendering system.
m_fontManager = new FontManager(512);
@ -111,7 +113,7 @@ public:
{
imguiDestroy();
BX_FREE(entry::getAllocator(), m_bigText);
unload(m_txtFile);
m_fontManager->destroyTtf(m_font);
// Destroy the fonts.
@ -253,7 +255,8 @@ public:
uint32_t m_debug;
uint32_t m_reset;
char* m_bigText;
void* m_txtFile;
bx::StringView m_bigText;
// Init the text rendering system.
FontManager* m_fontManager;

1
examples/common/font/font_manager.h
View File

@ -7,6 +7,7 @@
#define FONT_MANAGER_H_HEADER_GUARD
#include <bx/handlealloc.h>
#include <bx/string.h>
#include <bgfx/bgfx.h>
class Atlas;

209
examples/common/font/text_metrics.cpp
View File

@ -3,8 +3,6 @@
* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
*/
#include <wchar.h> // wcslen
#include "text_metrics.h"
#include "utf8.h"
@ -69,62 +67,19 @@ void TextMetrics::appendText(FontHandle _fontHandle, const char* _string)
BX_CHECK(state == UTF8_ACCEPT, "The string is not well-formed");
}
void TextMetrics::appendText(FontHandle _fontHandle, const wchar_t* _string)
{
const FontInfo& font = m_fontManager->getFontInfo(_fontHandle);
if (font.lineGap > m_lineGap)
{
m_lineGap = font.lineGap;
}
if ( (font.ascender - font.descender) > m_lineHeight)
{
m_height -= m_lineHeight;
m_lineHeight = font.ascender - font.descender;
m_height += m_lineHeight;
}
for (uint32_t ii = 0, end = (uint32_t)wcslen(_string); ii < end; ++ii)
{
uint32_t codepoint = _string[ii];
const GlyphInfo* glyph = m_fontManager->getGlyphInfo(_fontHandle, codepoint);
if (NULL != glyph)
{
if (codepoint == L'\n')
{
m_height += m_lineGap + font.ascender - font.descender;
m_lineGap = font.lineGap;
m_lineHeight = font.ascender - font.descender;
m_x = 0;
}
m_x += glyph->advance_x;
if(m_x > m_width)
{
m_width = m_x;
}
}
else
{
BX_CHECK(false, "Glyph not found");
}
}
}
TextLineMetrics::TextLineMetrics(const FontInfo& _fontInfo)
{
m_lineHeight = _fontInfo.ascender - _fontInfo.descender + _fontInfo.lineGap;
}
uint32_t TextLineMetrics::getLineCount(const char* _string) const
uint32_t TextLineMetrics::getLineCount(const bx::StringView& _str) const
{
CodePoint codepoint = 0;
uint32_t state = 0;
uint32_t lineCount = 1;
for (; *_string; ++_string)
for (const char* ptr = _str.getPtr(); ptr != _str.getTerm(); ++ptr)
{
if (utf8_decode(&state, (uint32_t*)&codepoint, *_string) == UTF8_ACCEPT)
if (utf8_decode(&state, (uint32_t*)&codepoint, *ptr) == UTF8_ACCEPT)
{
if (codepoint == L'\n')
{
@ -137,36 +92,26 @@ uint32_t TextLineMetrics::getLineCount(const char* _string) const
return lineCount;
}
uint32_t TextLineMetrics::getLineCount(const wchar_t* _string) const
{
uint32_t lineCount = 1;
for ( ;*_string != L'\0'; ++_string)
{
if(*_string == L'\n')
{
++lineCount;
}
}
return lineCount;
}
void TextLineMetrics::getSubText(const char* _string, uint32_t _firstLine, uint32_t _lastLine, const char*& _begin, const char*& _end)
void TextLineMetrics::getSubText(const bx::StringView& _str, uint32_t _firstLine, uint32_t _lastLine, const char*& _begin, const char*& _end)
{
CodePoint codepoint = 0;
uint32_t state = 0;
// y is bottom of a text line
uint32_t currentLine = 0;
while(*_string && (currentLine < _firstLine) )
const char* ptr = _str.getPtr();
while (ptr != _str.getTerm()
&& (currentLine < _firstLine) )
{
for (; *_string; ++_string)
for (; ptr != _str.getTerm(); ++ptr)
{
if (utf8_decode(&state, (uint32_t*)&codepoint, *_string) == UTF8_ACCEPT)
if (utf8_decode(&state, (uint32_t*)&codepoint, *ptr) == UTF8_ACCEPT)
{
if (codepoint == L'\n')
{
++currentLine;
++_string;
++ptr;
break;
}
}
@ -174,18 +119,19 @@ void TextLineMetrics::getSubText(const char* _string, uint32_t _firstLine, uint3
}
BX_CHECK(state == UTF8_ACCEPT, "The string is not well-formed");
_begin = _string;
_begin = ptr;
while ( (*_string) && (currentLine < _lastLine) )
while (ptr != _str.getTerm()
&& (currentLine < _lastLine) )
{
for (; *_string; ++_string)
for (; ptr != _str.getTerm(); ++ptr)
{
if(utf8_decode(&state, (uint32_t*)&codepoint, *_string) == UTF8_ACCEPT)
if(utf8_decode(&state, (uint32_t*)&codepoint, *ptr) == UTF8_ACCEPT)
{
if(codepoint == L'\n')
{
++currentLine;
++_string;
++ptr;
break;
}
}
@ -193,122 +139,5 @@ void TextLineMetrics::getSubText(const char* _string, uint32_t _firstLine, uint3
}
BX_CHECK(state == UTF8_ACCEPT, "The string is not well-formed");
_end = _string;
}
void TextLineMetrics::getSubText(const wchar_t* _string, uint32_t _firstLine, uint32_t _lastLine, const wchar_t*& _begin, const wchar_t*& _end)
{
uint32_t currentLine = 0;
while ( (*_string != L'\0') && (currentLine < _firstLine) )
{
for ( ;*_string != L'\0'; ++_string)
{
if(*_string == L'\n')
{
++currentLine;
++_string;
break;
}
}
}
_begin = _string;
while ( (*_string != L'\0') && (currentLine < _lastLine) )
{
for ( ;*_string != L'\0'; ++_string)
{
if(*_string == L'\n')
{
++currentLine;
++_string;
break;
}
}
}
_end = _string;
}
void TextLineMetrics::getVisibleText(const char* _string, float _top, float _bottom, const char*& _begin, const char*& _end)
{
CodePoint codepoint = 0;
uint32_t state = 0;
// y is bottom of a text line
float y = m_lineHeight;
while (*_string && (y < _top) )
{
for (; *_string; ++_string)
{
if(utf8_decode(&state, (uint32_t*)&codepoint, *_string) == UTF8_ACCEPT)
{
if(codepoint == L'\n')
{
y += m_lineHeight;
++_string;
break;
}
}
}
}
BX_CHECK(state == UTF8_ACCEPT, "The string is not well-formed");
_begin = _string;
// y is now top of a text line
y -= m_lineHeight;
while ( (*_string) && (y < _bottom) )
{
for (; *_string; ++_string)
{
if(utf8_decode(&state, (uint32_t*)&codepoint, *_string) == UTF8_ACCEPT)
{
if(codepoint == L'\n')
{
y += m_lineHeight;
++_string;
break;
}
}
}
}
BX_CHECK(state == UTF8_ACCEPT, "The string is not well-formed");
_end = _string;
}
void TextLineMetrics::getVisibleText(const wchar_t* _string, float _top, float _bottom, const wchar_t*& _begin, const wchar_t*& _end)
{
// y is bottom of a text line
float y = m_lineHeight;
const wchar_t* _textEnd = _string + wcslen(_string);
while (y < _top)
{
for (const wchar_t* _current = _string; _current < _textEnd; ++_current)
{
if(*_current == L'\n')
{
y += m_lineHeight;
++_string;
break;
}
}
}
_begin = _string;
// y is now top of a text line
y -= m_lineHeight;
while (y < _bottom )
{
for (const wchar_t* _current = _string; _current < _textEnd; ++_current)
{
if(*_current == L'\n')
{
y += m_lineHeight;
++_string;
break;
}
}
}
_end = _string;
_end = ptr;
}

16
examples/common/font/text_metrics.h
View File

@ -47,22 +47,10 @@ public:
float getLineHeight() const { return m_lineHeight; }
/// Return the number of text line in the given text.
uint32_t getLineCount(const char* _string) const;
/// Return the number of text line in the given text.
uint32_t getLineCount(const wchar_t* _string) const;
uint32_t getLineCount(const bx::StringView& _string) const;
/// Return the first and last character visible in the [_firstLine, _lastLine] range.
void getSubText(const char* _string, uint32_t _firstLine, uint32_t _lastLine, const char*& _begin, const char*& _end);
/// Return the first and last character visible in the [_firstLine, _lastLine] range.
void getSubText(const wchar_t* _string, uint32_t _firstLine, uint32_t _lastLine, const wchar_t*& _begin, const wchar_t*& _end);
/// Return the first and last character visible in the [_top, _bottom] range,
void getVisibleText(const char* _string, float _top, float _bottom, const char*& _begin, const char*& _end);
/// Return the first and last character visible in the [_top, _bottom] range,
void getVisibleText(const wchar_t* _string, float _top, float _bottom, const wchar_t*& _begin, const wchar_t*& _end);
void getSubText(const bx::StringView& _str, uint32_t _firstLine, uint32_t _lastLine, const char*& _begin, const char*& _end);
private:
float m_lineHeight;