bool FontRenderer::InitFontRenderer()
{
m_pManager = font_manager_new( 512, 512, 1 );
if (!m_pManager) {
fprintf(stderr, "%s:%d - error initializing the font manager\n", __FILE__, __LINE__);
return false;
}
m_pFont = font_manager_get_from_markup( m_pManager, &markup );
if (!m_pFont) {
fprintf(stderr, "%s:%d - error getting the font\n", __FILE__, __LINE__);
return false;
}
m_pTextBuffer = vertex_buffer_new( "v3f:t2f:c4f" );
if (!m_pTextBuffer) {
fprintf(stderr, "%s:%d - error creating the text buffer\n", __FILE__, __LINE__);
return false;
}
if (!m_fontShader.InitFontShader()) {
fprintf(stderr, "%s:%d - error compiling the shader program\n", __FILE__, __LINE__);
return false;
}
m_fontShader.Enable();
m_fontShader.SetFontMapTextureUnit(0);
return true;
}
// ----------------------------------------------------------------------------
void
text_buffer_add_text( text_buffer_t * self,
vec2 * pen, markup_t * markup,
const char * text, size_t length )
{
font_manager_t * manager = self->manager;
size_t i;
const char * prev_character = NULL;
if( markup == NULL )
{
return;
}
if( !markup->font )
{
markup->font = font_manager_get_from_markup( manager, markup );
if( ! markup->font )
{
fprintf( stderr, "Houston, we've got a problem !\n" );
exit( EXIT_FAILURE );
}
}
if( length == 0 )
{
length = utf8_strlen(text);
}
if( vertex_buffer_size( self->buffer ) == 0 )
{
self->origin = *pen;
self->line_left = pen->x;
self->bounds.left = pen->x;
self->bounds.top = pen->y;
}
else
{
if (pen->x < self->origin.x)
{
self->origin.x = pen->x;
}
if (pen->y != self->last_pen_y)
{
text_buffer_finish_line(self, pen, false);
}
}
for( i = 0; utf8_strlen( text + i ) && length; i += utf8_surrogate_len( text + i ) )
{
text_buffer_add_char( self, pen, markup, text + i, prev_character );
prev_character = text + i;
length--;
}
self->last_pen_y = pen->y;
}
/* ----------------------------------------------------------------- print - */
void TextRender::print(const std::wstring &_text,
const float &_x,
const float &_y)
{
m_mutex.lock();
m_pen = { { _x, _y } };
m_markup.font = font_manager_get_from_markup(m_text_buffer->manager, &m_markup);
text_buffer_clear(m_text_buffer);
text_buffer_add_text(m_text_buffer, &m_pen, &m_markup, const_cast<wchar_t*>(_text.c_str()), _text.size());
m_mutex.unlock();
}
// ------------------------------------------------------------------ print ---
void
print( text_buffer_t * buffer, vec2 * pen,
char *text, markup_t *markup )
{
char *seq_start = text, *seq_end = text;
char *p;
size_t i;
for( p=text; p<(text+strlen(text)); ++p )
{
char *start = strstr( p, "\033[" );
char *end = NULL;
if( start)
{
end = strstr( start+1, "m" );
}
if( (start == p) && (end > start) )
{
seq_start = start+2;
seq_end = end;
p = end;
}
else
{
int seq_size = (seq_end-seq_start)+1;
char * text_start = p;
int text_size = 0;
if( start )
{
text_size = start-p;
p = start-1;
}
else
{
text_size = text+strlen(text)-p;
p = text+strlen(text);
}
ansi_to_markup(seq_start, seq_size, markup );
markup->font = font_manager_get_from_markup( buffer->manager, markup );
text_buffer_add_text( buffer, pen, markup, text_start, text_size );
}
}
}
// ----------------------------------------------------------------------------
void
text_buffer_add_text( text_buffer_t * self,
vec2 * pen, markup_t * markup,
wchar_t * text, size_t length )
{
font_manager_t * manager = self->manager;
size_t i;
if( markup == NULL )
{
return;
}
if( !markup->font )
{
markup->font = font_manager_get_from_markup( manager, markup );
if( ! markup->font )
{
fprintf( stderr, "Houston, we've got a problem !\n" );
exit( EXIT_FAILURE );
}
}
if( length == 0 )
{
length = wcslen(text);
}
if( vertex_buffer_size( self->buffer ) == 0 )
{
self->origin = *pen;
}
text_buffer_add_wchar( self, pen, markup, text[0], 0 );
for( i=1; i<length; ++i )
{
text_buffer_add_wchar( self, pen, markup, text[i], text[i-1] );
}
}
void CFont::TextAdd(float x, float y, float _size, float rectw, float recth, const char *text, const unsigned length)
{
bool hasSizeChange = abs(_size - normal.size) > 0.01f;
bool hasTextChange = (0 == lasttext.size() || 0 != strcmp(text, lasttext.c_str()));
if (hasSizeChange || hasTextChange || nullptr == font_manager)
{
// DONE: rebuild a font texture and atlas
if (nullptr != font_manager)
{
glDeleteTextures(1, &font_manager->atlas->id);
font_manager->atlas->id = 0;
font_manager_delete(font_manager);
font_manager = nullptr;
}
normal.size = _size;
font_manager = font_manager_new(ATLAS_SIZE, ATLAS_SIZE, LCD_FILTERING_ON);
normal.font = font_manager_get_from_markup(font_manager, &normal);
normal.font->kerning = 0;
text_buffer_clear(buffer);
vec2 pen = { { 0, 0 } };
text_buffer_add_text(buffer, &pen, &normal, text, length);
//text_buffer_align(buffer, &pen, ALIGN_CENTER);
glGenTextures(1, &font_manager->atlas->id);
glBindTexture(GL_TEXTURE_2D, font_manager->atlas->id);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, font_manager->atlas->width,
font_manager->atlas->height, 0, GL_RGB, GL_UNSIGNED_BYTE,
font_manager->atlas->data);
vec4 bounds = text_buffer_get_bounds(buffer, &pen);
mBounds[0] = bounds.x;
mBounds[1] = bounds.y;
mBounds[2] = bounds.z;
mBounds[3] = bounds.w;
lasttext = text;
}
//
//vec2 pen = { { x, y } };
//text_buffer_add_text(buffer, &pen, &normal, text, length);
mat4_set_identity(&model);
float stretch = 1.01f; // mBounds[2] / (0.8f * rectw);
float xoffset = 0.25f * mBounds[2] / length;
float yoffset = recth - 0.5f * (recth - mBounds[3]);
mat4_set_scaling(&model, stretch, 1.0f, 1.0f);
mat4_translate(&model, x + xoffset, y + yoffset, 0.0f);
}
void init()
{
text_shader = shader_load( "text.vert",
"text.frag" );
font_manager = font_manager_new( 512, 512, LCD_FILTERING_ON );
buffer = text_buffer_new( );
vec4 black = {{0.0, 0.0, 0.0, 1.0}};
vec4 white = {{1.0, 1.0, 1.0, 1.0}};
vec4 yellow = {{1.0, 1.0, 0.0, 1.0}};
vec4 grey = {{0.5, 0.5, 0.5, 1.0}};
vec4 none = {{1.0, 1.0, 1.0, 0.0}};
//char *f_normal = match_description("Vera:size=50");
char *f_normal = match_description("Arial");
char *f_bold = match_description("Arial", true);
//char *f_bold = match_description("sans\\-serif:size=24");
char *f_italic = match_description("sans\\-serif", false, true);
//char *f_italic = match_description("SimSun", false, true);
//char *f_japanese = match_description("Droid Sans:size=18:lang=ja");
//char *f_japanese = match_description("sans-serif:size=18:lang=zh");
//char *f_japanese = match_description("sans\\-serif:size=18:lang=zh\\-CN");
//char *f_japanese = match_description("FZLanTingHeiS\\-UL\\-GB:size=18:lang=zh\\-CN"); //ok
//char *f_japanese = match_description("FZLanTingHeiS\\-UL\\-GB"); //ok
//char *f_japanese = match_description("Yu Gothic UI Semibold"); //ok
//char *f_japanese = match_description("jj:size=18"); //ok
//char *f_japanese = match_description("Brush Script MT"); //ok
char *f_japanese = match_description("Microsoft JhengHei UI"); //ok
//char *f_japanese = match_description("华文隶书:size=28:lang=zh\\-CN"); //no
char *f_math = match_description("DejaVu Sans");
printf("init. f_normal: %s f_bold: %s f_italic: %s f_japanese: %s f_math: %s\n" , f_normal, f_bold, f_italic, f_japanese, f_math);
//printf("init. f_japanese: %s\n" , f_japanese);
//exit(0);
markup_t normal = {
.family = f_normal,
.size = 20.0, .bold = 0, .italic = 0,
.spacing = 0.0, .gamma = 2.,
.foreground_color = white, .background_color = none,
.outline = 0, .outline_color = white,
.underline = 0, .underline_color = white,
.overline = 0, .overline_color = white,
.strikethrough = 0, .strikethrough_color = white,
.font = 0,
};
markup_t highlight = normal; highlight.background_color = grey;
markup_t reverse = normal; reverse.foreground_color = black;
reverse.background_color = white;
reverse.gamma = 1.0;
markup_t overline = normal; overline.overline = 1;
markup_t underline = normal; underline.underline = 1;
markup_t small = normal; small.size = 10.0;
markup_t big = normal; big.size = 48.0;
big.italic = 1;
big.foreground_color = yellow;
markup_t bold = normal; bold.bold = 1; bold.family = f_bold;
markup_t italic = normal; italic.italic = 1; italic.family = f_italic;
markup_t japanese = normal; japanese.family = f_japanese;
//markup_t japanese = normal; japanese.family = "C:/Windows/Fonts/simsun.ttc";
//markup_t japanese = normal; japanese.family = "c:/qtproject/opengl/freetype-gl/fonts/fireflysung.ttf";
japanese.size = 25.0;
markup_t math = normal; math.family = f_math;
#if 1
normal.font = font_manager_get_from_markup( font_manager, &normal );
highlight.font = font_manager_get_from_markup( font_manager, &highlight );
reverse.font = font_manager_get_from_markup( font_manager, &reverse );
overline.font = font_manager_get_from_markup( font_manager, &overline );
underline.font = font_manager_get_from_markup( font_manager, &underline );
small.font = font_manager_get_from_markup( font_manager, &small );
big.font = font_manager_get_from_markup( font_manager, &big );
bold.font = font_manager_get_from_markup( font_manager, &bold );
italic.font = font_manager_get_from_markup( font_manager, &italic );
japanese.font = font_manager_get_from_markup( font_manager, &japanese );
math.font = font_manager_get_from_markup( font_manager, &math );
#else
japanese.font = font_manager_get_from_markup( font_manager, &japanese );
#endif
vec2 pen = {{20, 200}};
#if 1
text_buffer_printf( buffer, &pen,
&underline, "The",
&normal, " Quick",
&big, " brown ",
&reverse, " fox \n",
&italic, "jumps over ",
&bold, "the lazy ",
&normal, "dog.\n",
&small, "Now is the time for all good men "
"to come to the aid of the party.\n",
&italic, "Ég get etið gler án þess að meiða mig.\n",
&japanese, "aaa张私はガラスを食べられます。 それは私を傷つけません\n",
&math, "ℕ ⊆ ℤ ⊂ ℚ ⊂ ℝ ⊂ ℂ",
NULL );
#else
text_buffer_printf( buffer, &pen,
&japanese, "Brush Script MT张私はガラスを食べられます。 それは私を傷つけません\n",
NULL );
#endif
glGenTextures( 1, &font_manager->atlas->id );
glBindTexture( GL_TEXTURE_2D, font_manager->atlas->id );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, font_manager->atlas->width,
font_manager->atlas->height, 0, GL_RGB, GL_UNSIGNED_BYTE,
font_manager->atlas->data );
printf("init font_manager->atlas->width: %d font_manager->atlas->height: %d\n"
, font_manager->atlas->width, font_manager->atlas->height);
text_buffer_align( buffer, &pen, ALIGN_CENTER );
vec4 bounds = text_buffer_get_bounds( buffer, &pen );
float left = bounds.left;
float right = bounds.left + bounds.width;
float top = bounds.top;
float bottom = bounds.top - bounds.height;
bounds_shader = shader_load( "v3f-c4f.vert",
"v3f-c4f.frag" );
lines_buffer = vertex_buffer_new( "vertex:3f,color:4f" );
vertex_t vertices[] = { { left - 10, top, 0, 0,0,0,1}, // top
{right + 10, top, 0, 0,0,0,1},
{ left - 10, bottom, 0, 0,0,0,1}, // bottom
{right + 10, bottom, 0, 0,0,0,1},
{ left, top + 10, 0, 0,0,0,1}, // left
{ left, bottom - 10, 0, 0,0,0,1},
{ right, top + 10, 0, 0,0,0,1}, // right
{ right, bottom - 10, 0, 0,0,0,1} };
GLuint indices[] = { 0,1,2,3,4,5,6,7 };
vertex_buffer_push_back( lines_buffer, vertices, 8, indices, 8);
mat4_set_identity( &projection );
mat4_set_identity( &model );
mat4_set_identity( &view );
}
// ---------------------------------------------------------------- display ---
void display( GLFWwindow* window )
{
glClearColor(0.40,0.40,0.45,1.00);
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glColor4f(1.00,1.00,1.00,1.00);
glUseProgram( text_shader );
{
glUniformMatrix4fv( glGetUniformLocation( text_shader, "model" ),
1, 0, model.data);
glUniformMatrix4fv( glGetUniformLocation( text_shader, "view" ),
1, 0, view.data);
glUniformMatrix4fv( glGetUniformLocation( text_shader, "projection" ),
1, 0, projection.data);
glUniform1i( glGetUniformLocation( text_shader, "tex" ), 0 );
glUniform3f( glGetUniformLocation( text_shader, "pixel" ),
1.0f/font_manager->atlas->width,
1.0f/font_manager->atlas->height,
(float)font_manager->atlas->depth );
glEnable( GL_BLEND );
glActiveTexture( GL_TEXTURE0 );
glBindTexture( GL_TEXTURE_2D, font_manager->atlas->id );
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
glBlendColor( 1, 1, 1, 1 );
vertex_buffer_render( buffer->buffer, GL_TRIANGLES );
glBindTexture( GL_TEXTURE_2D, 0 );
glBlendColor( 0, 0, 0, 0 );
glUseProgram( 0 );
}
glBlendFunc( GL_ONE, GL_ONE_MINUS_SRC_ALPHA );
glBlendColor( 1.0, 1.0, 1.0, 1.0 );
glUseProgram( bounds_shader );
{
glUniformMatrix4fv( glGetUniformLocation( bounds_shader, "model" ),
1, 0, model.data);
glUniformMatrix4fv( glGetUniformLocation( bounds_shader, "view" ),
1, 0, view.data);
glUniformMatrix4fv( glGetUniformLocation( bounds_shader, "projection" ),
1, 0, projection.data);
vertex_buffer_render( lines_buffer, GL_LINES );
}
glfwSwapBuffers( window );
}
// ----------------------------------------------------------------------------
void
text_buffer_add_text( text_buffer_t * self,
vec2 * pen, markup_t * markup,
wchar_t * text, size_t length )
{
vertex_buffer_t * buffer = self->buffer;
font_manager_t * manager = self->manager;
if( markup == NULL )
{
return;
}
if( !markup->font )
{
markup->font = font_manager_get_from_markup( manager, markup );
if( ! markup->font )
{
fprintf( stderr, "Houston, we've got a problem !\n" );
exit( EXIT_FAILURE );
}
}
if( length == 0 )
{
length = wcslen(text);
}
if( vertex_buffer_size( self->buffer ) == 0 )
{
self->origin = *pen;
}
if( markup->font->ascender > self->line_ascender )
{
size_t i, j;
float dy = (int)(markup->font->ascender - self->line_ascender);
for( i=self->line_start; i < vector_size( buffer->items ); ++i )
{
ivec4 *item = (ivec4 *) vector_get( buffer->items, i);
for( j=item->vstart; j<item->vstart+item->vcount; ++j)
{
glyph_vertex_t * vertex =
(glyph_vertex_t *) vector_get( buffer->vertices, j );
vertex->y -= dy;
}
}
self->line_ascender = markup->font->ascender;
pen->y -= dy;
}
if( markup->font->descender < self->line_descender )
{
self->line_descender = markup->font->descender;
}
text_buffer_add_wchar( self, pen, markup, text[0], 0 );
size_t i;
for( i=1; i<length; ++i )
{
text_buffer_add_wchar( self, pen, markup, text[i], text[i-1] );
}
}
