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glBitmap

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Garux
2020-05-12 13:47:57 +03:00
parent 33f7e66b87
commit 7013999ae1
1 changed files with 86 additions and 20 deletions
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libs/gtkutil/glfont.cpp
+86 -20
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@@ -669,12 +669,12 @@ GLFont *glfont_create( const char* font_string ){
#include <pango/pangoft2.h>
#include <pango/pango-utils.h>
#include <gtk/gtkglwidget.h>
#include <gtk/gtksettings.h>
PangoFont* tryFont( const char* font_string, PangoFontDescription*& font_desc, GLuint font_list_base ){
PangoFont* tryFont( const char* font_string, PangoFontMap *fontmap, PangoContext *context, PangoFontDescription*& font_desc ){
pango_font_description_free( font_desc );
font_desc = pango_font_description_from_string( font_string );
return gdk_gl_font_use_pango_font( font_desc, 0, 256, font_list_base );
return pango_font_map_load_font( fontmap, context, font_desc );
}
GLFont *glfont_create( const char* font_string ){
@@ -683,41 +683,39 @@ GLFont *glfont_create( const char* font_string ){
PangoFontDescription* font_desc = 0;
PangoFont* font = 0;
PangoFontMap *fontmap = pango_ft2_font_map_new();
pango_ft2_font_map_set_resolution( PANGO_FT2_FONT_MAP( fontmap ), 72, 72 );
PangoContext *ft2_context = pango_font_map_create_context( fontmap );
do
{
if( *font_string != '\0' )
if( ( font = tryFont( font_string, font_desc, font_list_base ) ) )
if( ( font = tryFont( font_string, fontmap, ft2_context, font_desc ) ) )
break;
#ifdef WIN32
if( ( font = tryFont( "arial 8", font_desc, font_list_base ) ) )
if( ( font = tryFont( "arial 8", fontmap, ft2_context, font_desc ) ) )
break;
if( ( font = tryFont( "fixed 8", font_desc, font_list_base ) ) )
if( ( font = tryFont( "fixed 8", fontmap, ft2_context, font_desc ) ) )
break;
if( ( font = tryFont( "courier new 8", font_desc, font_list_base ) ) )
if( ( font = tryFont( "courier new 8", fontmap, ft2_context, font_desc ) ) )
break;
#endif
GtkSettings *settings = gtk_settings_get_default();
gchar *fontname;
g_object_get( settings, "gtk-font-name", &fontname, NULL );
font = tryFont( fontname, font_desc, font_list_base );
font = tryFont( fontname, fontmap, ft2_context, font_desc );
g_free( fontname );
if( !font ){
const char* guessFonts[] = { "serif 8", "sans 8", "clean 8", "courier 8", "helvetica 8", "arial 8", "dejavu sans 8" };
for( const auto str : guessFonts ){
if( ( font = tryFont( str, font_desc, font_list_base ) ) )
if( ( font = tryFont( str, fontmap, ft2_context, font_desc ) ) )
break;
}
}
} while ( 0 );
PangoFontMap *fontmap = 0;
PangoContext *ft2_context = 0;
if ( font != 0 ) {
fontmap = pango_ft2_font_map_new();
pango_ft2_font_map_set_resolution( PANGO_FT2_FONT_MAP( fontmap ), 72, 72 );
ft2_context = pango_font_map_create_context( fontmap );
pango_context_set_font_description( ft2_context, font_desc );
PangoLayout *layout = pango_layout_new( ft2_context );
@@ -733,11 +731,11 @@ GLFont *glfont_create( const char* font_string ){
int font_descent_pango_units = log_rect.height - font_ascent_pango_units;
/* settings for render to tex; need to multiply size, so that bitmap callLists way size would be approximately = texture way */
gint fontsize = pango_font_description_get_size( font_desc );
fontsize *= 3;
fontsize /= 2; //*15/11 is equal to bitmap callLists size
pango_font_description_set_size( font_desc, fontsize );
pango_context_set_font_description( ft2_context, font_desc );
// gint fontsize = pango_font_description_get_size( font_desc );
// fontsize *= 3;
// fontsize /= 2; //*15/11 is equal to bitmap callLists size
// pango_font_description_set_size( font_desc, fontsize );
// pango_context_set_font_description( ft2_context, font_desc );
// globalOutputStream() << pango_font_description_get_family( font_desc ) << " " << pango_font_description_get_size( font_desc ) << "\n";
@@ -748,6 +746,74 @@ GLFont *glfont_create( const char* font_string ){
font_descent = PANGO_PIXELS_CEIL( font_descent_pango_units );
font_height = font_ascent + font_descent;
}
/* render displaylists */
if ( font != 0 ) {
PangoLayout *layout;
PangoRectangle log_rect;
FT_Bitmap bitmap;
layout = pango_layout_new( ft2_context );
pango_layout_set_width( layout, -1 ); // -1 no wrapping. All text on one line.
GLint alignment;
glGetIntegerv( GL_UNPACK_ALIGNMENT, &alignment );
glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
// glPixelStorei( GL_UNPACK_SWAP_BYTES, GL_TRUE );
// glPixelStorei( GL_UNPACK_LSB_FIRST, GL_TRUE );
for( unsigned char c = 0; ; ++c ){
pango_layout_set_text( layout, reinterpret_cast<const char*>( &c ), 1 );
pango_layout_get_extents( layout, NULL, &log_rect );
if ( log_rect.width > 0 && log_rect.height > 0 ) {
bitmap.rows = PANGO_PIXELS_CEIL( log_rect.height );//m_pixelAscent + m_pixelDescent;
bitmap.width = PANGO_PIXELS_CEIL( log_rect.width );
bitmap.pitch = -bitmap.width; // Rendering it "upside down" for OpenGL.
unsigned char *boo = (unsigned char *) malloc( bitmap.rows * bitmap.width );
memset( boo, 0, bitmap.rows * bitmap.width );
// bitmap.buffer = boo;
bitmap.buffer = boo + ( bitmap.rows - 1 ) * bitmap.width; // See pitch above.
// bitmap.num_grays = 0xff;
// bitmap.pixel_mode = FT_PIXEL_MODE_GRAY;
bitmap.pixel_mode = FT_PIXEL_MODE_MONO;
pango_ft2_render_layout_subpixel( &bitmap, layout, -log_rect.x, 0 );
/* convert byte per pixel to bitmap */
unsigned char *buf = (unsigned char *) malloc( bitmap.rows * bitmap.width );
memset( buf, 0, bitmap.rows * bitmap.width );
unsigned char* writeByte = buf - 1;
for( unsigned int row = 0; row < bitmap.rows; ++row ){
unsigned char* readStart = boo + row * bitmap.width;
for( unsigned int col = 0; col < bitmap.width; ++col ){
if( ( col % 8 ) == 0 )
++writeByte;
if( *( readStart + col ) > 127 ){
*writeByte |= 1UL << ( 7 - ( col % 8 ) );
if( c == 57 ){
globalOutputStream() << *( readStart + col ) << " *( readStart + col )\n";
}
}
}
}
glNewList( font_list_base + c, GL_COMPILE );
glBitmap( bitmap.width, bitmap.rows, 0, font_descent, bitmap.width, 0, buf );
//glDrawPixels( bitmap.width, bitmap.rows, GL_RED, GL_UNSIGNED_BYTE, boo);
//glBitmap(0,0,0,0,bitmap.width,0,NULL);
//glTranslatef( bitmap.width, 0, 0 );
glEndList();
free( boo );
free( buf );
}
if( c == 255 )
break;
}
glPixelStorei( GL_UNPACK_ALIGNMENT, alignment );
g_object_unref( G_OBJECT( layout ) );
}
pango_font_description_free( font_desc );