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netradiant-custom/libs/gtkutil/glfont.cpp
Garux 57865138b9 g_free after g_object_get
2019-04-23 18:22:24 +03:00

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/*
Copyright (C) 2001-2006, William Joseph.
All Rights Reserved.
This file is part of GtkRadiant.
GtkRadiant is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
GtkRadiant is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GtkRadiant; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "glfont.h"
#include "igl.h"
#include <pango/pangoft2.h>
#include <pango/pango-utils.h>
void gray_to_texture( const unsigned int x_max, const unsigned int y_max, const unsigned char *in, unsigned char *out, const unsigned char fontColorR, const unsigned char fontColorG, const unsigned char fontColorB ){ /* normal with shadow */
unsigned int x, y, bitmapIter = 0;
const unsigned char backgroundColorR = 0;
const unsigned char backgroundColorG = 0;
const unsigned char backgroundColorB = 0;
for( y = 0; y < y_max; y++ ) {
for( x = 0; x < x_max; x++ ) {
const unsigned int iter = ( y * x_max + x ) * 4;
if( x == 0 || y == 0 || x == 1 || y == 1 ) {
out[iter] = fontColorB;
out[iter + 1] = fontColorG;
out[iter + 2] = fontColorR;
out[iter + 3] = 0;
continue;
}
if( in[bitmapIter] == 0 ){
out[iter] = fontColorB;
out[iter + 1] = fontColorG;
out[iter + 2] = fontColorR;
out[iter + 3] = 0;
}
else{
out[iter] = backgroundColorB;
out[iter + 1] = backgroundColorG;
out[iter + 2] = backgroundColorR;
out[iter + 3] = in[bitmapIter];
}
++bitmapIter;
}
}
bitmapIter = 0;
for( y = 0; y < y_max; y++ ) {
for( x = 0; x < x_max; x++ ) {
const unsigned int iter = ( y * x_max + x ) * 4;
if( x == 0 || y == 0 || x == ( x_max - 1 ) || y == ( y_max - 1 ) ) {
continue;
}
if( in[bitmapIter] != 0 ) {
if( out[iter + 3] == 0 ){
out[iter] = fontColorB;
out[iter + 1] = fontColorG;
out[iter + 2] = fontColorR;
out[iter + 3] = in[bitmapIter];
}
else{
/* Calculate alpha (opacity). */
const float opacityFont = in[bitmapIter] / 255.f;
const float opacityBack = out[iter + 3] / 255.f;
out[iter] = fontColorB * opacityFont + ( 1 - opacityFont ) * backgroundColorB;
out[iter + 1] = fontColorG * opacityFont + ( 1 - opacityFont ) * backgroundColorG;
out[iter + 2] = fontColorR * opacityFont + ( 1 - opacityFont ) * backgroundColorR;
out[iter + 3] = ( opacityFont + ( 1 - opacityFont ) * opacityBack ) * 255.f;
}
}
++bitmapIter;
}
}
}
// generic string printing with call lists
class GLFontCallList final : public GLFont
{
GLuint m_displayList;
int m_pixelHeight;
int m_pixelAscent;
int m_pixelDescent;
PangoFontMap *m_fontmap;
PangoContext *m_ft2_context;
public:
GLFontCallList( GLuint displayList, int asc, int desc, int pixelHeight, PangoFontMap *fontmap, PangoContext *ft2_context ) :
m_displayList( displayList ), m_pixelHeight( pixelHeight ), m_pixelAscent( asc ), m_pixelDescent( desc ), m_fontmap( fontmap ), m_ft2_context( ft2_context ){
}
~GLFontCallList(){
glDeleteLists( m_displayList, 256 );
if( m_ft2_context )
g_object_unref( G_OBJECT( m_ft2_context ) );
if( m_fontmap )
g_object_unref( G_OBJECT( m_fontmap ) );
}
void printString( const char *s ){
GlobalOpenGL().m_glListBase( m_displayList );
GlobalOpenGL().m_glCallLists( GLsizei( strlen( s ) ), GL_UNSIGNED_BYTE, reinterpret_cast<const GLubyte*>( s ) );
}
void renderString( const char *s, const GLuint& tex, const unsigned char colour[3], unsigned int& wid, unsigned int& hei ){
if( !m_ft2_context || m_pixelHeight == 0 ){
wid = hei = 0;
return;
}
PangoLayout *layout;
PangoRectangle log_rect;
FT_Bitmap bitmap;
layout = pango_layout_new( m_ft2_context );
pango_layout_set_width( layout, -1 ); // -1 no wrapping. All text on one line.
pango_layout_set_text( layout, s, -1 ); // -1 null-terminated string.
pango_layout_get_extents( layout, NULL, &log_rect );
if ( log_rect.width > 0 && log_rect.height > 0 ) {
hei = bitmap.rows = PANGO_PIXELS_CEIL( log_rect.height );//m_pixelAscent + m_pixelDescent;
wid = bitmap.width = PANGO_PIXELS_CEIL( log_rect.width );
// globalOutputStream() << wid << " " << hei << " rendering\n";
bitmap.pitch = bitmap.width;
unsigned char *boo = (unsigned char *) malloc( bitmap.rows * bitmap.width );
memset( boo, 0, bitmap.rows * bitmap.width );
bitmap.buffer = boo;
bitmap.num_grays = 0xff;
bitmap.pixel_mode = FT_PIXEL_MODE_GRAY;
pango_ft2_render_layout_subpixel( &bitmap, layout, -log_rect.x, 0 );
hei += 2;
wid += 2;
unsigned char *buf = (unsigned char *) malloc( 4 * hei * wid );
memset( buf, 0x00, 4 * hei * wid );
#if 0
GLfloat color[4] = { 1, 0, 0, 1 };
guint32 rgb = ( ( ( guint32 )( color[0] * 255.0 ) ) << 24 ) |
( ( ( guint32 )( color[1] * 255.0 ) ) << 16 ) |
( ( ( guint32 )( color[2] * 255.0 ) ) << 8 );
GLfloat a = color[3];
guint32 *t;
guint8 *row, *row_end;
row = bitmap.buffer + bitmap.rows * bitmap.width; /* past-the-end */
row_end = bitmap.buffer; /* beginning */
t = ( guint32* ) buf;
if( a == 1.0 ) {
do {
row -= bitmap.width;
for( unsigned int i = 0; i < bitmap.width; i++ )
*t++ = rgb | ( ( guint32 ) row[i] );
} while( row != row_end );
} else
{
do
{
row -= bitmap.width;
for( unsigned int i = 0; i < bitmap.width; i++ )
* t++ = rgb | ( ( guint32 )( a* row[i] ) );
} while( row != row_end );
}
#endif // 0
#if 0
if( withfond ){ /* with background rectangle */
const unsigned int x_max = wid;
const unsigned int y_max = hei;
unsigned int x, y, bitmapIter = 0;
const unsigned char fontColorR = 255;
const unsigned char fontColorG = 255;
const unsigned char fontColorB = 0;
const unsigned char backgroundColorR = 64;
const unsigned char backgroundColorG = 64;
const unsigned char backgroundColorB = 64;
for( y = 0; y < y_max; y++ ) {
for( x = 0; x < x_max; x++ ) {
const unsigned int iter = ( y * x_max + x ) * 4;
if( x == 0 || y == 0 || x == ( x_max - 1 ) || y == ( y_max - 1 ) ) {
buf[iter] = backgroundColorB;
buf[iter + 1] = backgroundColorG;
buf[iter + 2] = backgroundColorR;
buf[iter + 3] = 150; /* half trans border */
continue;
}
if( bitmap.buffer[bitmapIter] == 0 ) {
/* Render background color. */
buf[iter] = backgroundColorB;
buf[iter + 1] = backgroundColorG;
buf[iter + 2] = backgroundColorR;
buf[iter + 3] = 255;
}
else {
/* Calculate alpha (opacity). */
const float opacity = bitmap.buffer[bitmapIter] / 255.f;
buf[iter] = fontColorB * opacity + ( 1 - opacity ) * backgroundColorB;
buf[iter + 1] = fontColorG * opacity + ( 1 - opacity ) * backgroundColorG;
buf[iter + 2] = fontColorR * opacity + ( 1 - opacity ) * backgroundColorR;
buf[iter + 3] = 255;
}
++bitmapIter;
}
}
}
#elif 0
if( 1 ){ /* normal with shadow */
const unsigned int x_max = wid;
const unsigned int y_max = hei;
unsigned int x, y, bitmapIter = 0;
// unsigned char fontColorR = 255;
// unsigned char fontColorG = 255;
// unsigned char fontColorB = 0;
unsigned char fontColorR = colour[0];
unsigned char fontColorG = colour[1];
unsigned char fontColorB = colour[2];
unsigned char backgroundColorR = 0;
unsigned char backgroundColorG = 0;
unsigned char backgroundColorB = 0;
for( y = 0; y < y_max; y++ ) {
for( x = 0; x < x_max; x++ ) {
const unsigned int iter = ( y * x_max + x ) * 4;
if( x == 0 || y == 0 || x == 1 || y == 1 ) {
buf[iter] = fontColorB;
buf[iter + 1] = fontColorG;
buf[iter + 2] = fontColorR;
buf[iter + 3] = 0;
continue;
}
if( bitmap.buffer[bitmapIter] == 0 ){
buf[iter] = fontColorB;
buf[iter + 1] = fontColorG;
buf[iter + 2] = fontColorR;
buf[iter + 3] = 0;
}
else{
buf[iter] = backgroundColorB;
buf[iter + 1] = backgroundColorG;
buf[iter + 2] = backgroundColorR;
buf[iter + 3] = bitmap.buffer[bitmapIter];
}
++bitmapIter;
}
}
bitmapIter = 0;
for( y = 0; y < y_max; y++ ) {
for( x = 0; x < x_max; x++ ) {
const unsigned int iter = ( y * x_max + x ) * 4;
if( x == 0 || y == 0 || x == ( x_max - 1 ) || y == ( y_max - 1 ) ) {
continue;
}
if( bitmap.buffer[bitmapIter] != 0 ) {
if( buf[iter + 3] == 0 ){
buf[iter] = fontColorB;
buf[iter + 1] = fontColorG;
buf[iter + 2] = fontColorR;
buf[iter + 3] = bitmap.buffer[bitmapIter];
}
else{
/* Calculate alpha (opacity). */
const float opacityFont = bitmap.buffer[bitmapIter] / 255.f;
const float opacityBack = buf[iter + 3] / 255.f;
buf[iter] = fontColorB * opacityFont + ( 1 - opacityFont ) * backgroundColorB;
buf[iter + 1] = fontColorG * opacityFont + ( 1 - opacityFont ) * backgroundColorG;
buf[iter + 2] = fontColorR * opacityFont + ( 1 - opacityFont ) * backgroundColorR;
buf[iter + 3] = ( opacityFont + ( 1 - opacityFont ) * opacityBack ) * 255.f;
}
}
++bitmapIter;
}
}
}
else{ /* normal */
const unsigned int x_max = wid;
const unsigned int y_max = hei;
unsigned int x, y, bitmapIter = 0;
// unsigned char fontColorR = 0;
// unsigned char fontColorG = 255;
// unsigned char fontColorB = 0;
unsigned char fontColorR = colour[0];
unsigned char fontColorG = colour[1];
unsigned char fontColorB = colour[2];
for( y = 0; y < y_max; y++ ) {
for( x = 0; x < x_max; x++ ) {
const unsigned int iter = ( y * x_max + x ) * 4;
if( x == 0 || y == 0 || x == ( x_max - 1 ) || y == ( y_max - 1 ) ) {
buf[iter] = fontColorB;
buf[iter + 1] = fontColorG;
buf[iter + 2] = fontColorR;
buf[iter + 3] = 0;
continue;
}
buf[iter] = fontColorB;
buf[iter + 1] = fontColorG;
buf[iter + 2] = fontColorR;
buf[iter + 3] = bitmap.buffer[bitmapIter];
++bitmapIter;
}
}
}
#endif // 0
//Now we just setup some texture paramaters.
glBindTexture( GL_TEXTURE_2D, tex );
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_NEAREST );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
// glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
// glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
//Here we actually create the texture itself
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA8, wid * 3, hei,
0, GL_BGRA, GL_UNSIGNED_BYTE, 0 );
/* normal with shadow */
gray_to_texture( wid, hei, bitmap.buffer, buf, colour[0], colour[1], colour[2] );
glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0, wid, hei, GL_BGRA, GL_UNSIGNED_BYTE, buf );
memset( buf, 0x00, 4 * hei * wid );
/* yellow selected with shadow */
gray_to_texture( wid, hei, bitmap.buffer, buf, 255, 255, 0 );
glTexSubImage2D( GL_TEXTURE_2D, 0, wid, 0, wid, hei, GL_BGRA, GL_UNSIGNED_BYTE, buf );
memset( buf, 0x00, 4 * hei * wid );
/* orange childSelected with shadow */
gray_to_texture( wid, hei, bitmap.buffer, buf, 255, 128, 0 );
glTexSubImage2D( GL_TEXTURE_2D, 0, wid * 2, 0, wid, hei, GL_BGRA, GL_UNSIGNED_BYTE, buf );
glBindTexture( GL_TEXTURE_2D, 0 );
free( buf );
free( boo );
}
g_object_unref( G_OBJECT( layout ) );
}
int getPixelAscent() const {
return m_pixelAscent;
}
int getPixelDescent() const {
return m_pixelDescent;
}
int getPixelHeight() const {
return m_pixelHeight;
}
};
#ifdef _WIN32
#include <windows.h>
#endif
#include "debugging/debugging.h"
// LordHavoc: this is code for direct Xlib bitmap character fetching, as an
// alternative to requiring gtkglarea, it was created due to a lack of this
// package on SuSE 9.x but this package is now commonly shipping in Linux
// distributions so this code may be unnecessary, feel free however to enable
// it when building packages for distros that do not ship with that package,
// or if you just prefer less dependencies...
#if 0
#include <X11/Xlib.h>
#include <gdk/gdkx.h>
#include <GL/glx.h>
GLFont *glfont_create( const char* font_string ){
GLuint font_list_base;
XFontStruct *fontInfo;
Display *dpy = GDK_DISPLAY();
unsigned int i, first, last, firstrow, lastrow;
int maxchars;
int firstbitmap;
fontInfo = XLoadQueryFont( dpy, "-*-fixed-*-*-*-*-8-*-*-*-*-*-*-*" );
if ( fontInfo == NULL ) {
// try to load other fonts
fontInfo = XLoadQueryFont( dpy, "-*-fixed-*-*-*-*-*-*-*-*-*-*-*-*" );
// any font will do !
if ( fontInfo == NULL ) {
fontInfo = XLoadQueryFont( dpy, "-*-*-*-*-*-*-*-*-*-*-*-*-*-*" );
}
if ( fontInfo == NULL ) {
ERROR_MESSAGE( "couldn't create font" );
}
}
first = (int)fontInfo->min_char_or_byte2;
last = (int)fontInfo->max_char_or_byte2;
firstrow = (int)fontInfo->min_byte1;
lastrow = (int)fontInfo->max_byte1;
/*
* How many chars in the charset
*/
maxchars = 256 * lastrow + last;
font_list_base = glGenLists( maxchars + 1 );
if ( font_list_base == 0 ) {
ERROR_MESSAGE( "couldn't create font" );
}
/*
* Get offset to first char in the charset
*/
firstbitmap = 256 * firstrow + first;
/*
* for each row of chars, call glXUseXFont to build the bitmaps.
*/
for ( i = firstrow; i <= lastrow; i++ )
{
glXUseXFont( fontInfo->fid, firstbitmap, last - first + 1, font_list_base + firstbitmap );
firstbitmap += 256;
}
/* *height = fontInfo->ascent + fontInfo->descent;
*width = fontInfo->max_bounds.width; */
return new GLFontCallList( font_list_base, fontInfo->ascent, fontInfo->descent, fontInfo->ascent + fontInfo->descent );
}
#elif 0
#include <gtk/gtkglwidget.h>
GLFont *glfont_create( const char* font_string ){
GLuint font_list_base = glGenLists( 256 );
gint font_height = 0, font_ascent = 0, font_descent = 0;
PangoFontDescription* font_desc = pango_font_description_from_string( font_string );
PangoFont* font = gdk_gl_font_use_pango_font( font_desc, 0, 256, font_list_base );
if ( font == 0 ) {
pango_font_description_free( font_desc );
font_desc = pango_font_description_from_string( "fixed 8" );
font = gdk_gl_font_use_pango_font( font_desc, 0, 256, font_list_base );
}
if ( font == 0 ) {
pango_font_description_free( font_desc );
font_desc = pango_font_description_from_string( "courier new 8" );
font = gdk_gl_font_use_pango_font( font_desc, 0, 256, font_list_base );
}
if ( font != 0 ) {
PangoFontMetrics* font_metrics = pango_font_get_metrics( font, 0 );
font_ascent = pango_font_metrics_get_ascent( font_metrics );
font_descent = pango_font_metrics_get_descent( font_metrics );
font_height = font_ascent + font_descent;
font_ascent = PANGO_PIXELS( font_ascent );
font_descent = PANGO_PIXELS( font_descent );
font_height = PANGO_PIXELS( font_height );
pango_font_metrics_unref( font_metrics );
}
pango_font_description_free( font_desc );
// fix for pango/gtkglext metrix bug
if ( font_height > 256 ) {
font_height = 16;
}
return new GLFontCallList( font_list_base, font_ascent, font_descent, font_height );
}
#elif 0
// new font code ripped from ZeroRadiant
#include <pango/pangoft2.h>
#include <pango/pango-features.h> //has PANGO_VERSION_CHECK
#include <pango/pango-utils.h>
class GLFontInternal : public GLFont
{
const char *font_string;
int font_height;
int font_ascent;
int font_descent;
int y_offset_bitmap_render_pango_units;
PangoContext *ft2_context;
PangoFontMap *fontmap;
public:
GLFontInternal( const char *_font_string ) : font_string( _font_string ){
PangoFontDescription *font_desc;
PangoLayout *layout;
PangoRectangle log_rect;
int font_ascent_pango_units;
int font_descent_pango_units;
#if !PANGO_VERSION_CHECK( 1,22,0 )
ft2_context = pango_ft2_get_context( 72, 72 );
#else
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 );
#endif
font_desc = pango_font_description_from_string( font_string );
//pango_font_description_set_size(font_desc, 10 * PANGO_SCALE);
pango_context_set_font_description( ft2_context, font_desc );
pango_font_description_free( font_desc );
// TODO fallback to fixed 8, courier new 8
layout = pango_layout_new( ft2_context );
#ifdef FONT_SIZE_WORKAROUND
pango_layout_set_width( layout, -1 ); // -1 no wrapping. All text on one line.
pango_layout_set_text( layout, "The quick brown fox jumped over the lazy sleeping dog's back then sat on a tack.", -1 ); // -1 null-terminated string.
#endif
#if !PANGO_VERSION_CHECK( 1,22,0 )
PangoLayoutIter *iter;
iter = pango_layout_get_iter( layout );
font_ascent_pango_units = pango_layout_iter_get_baseline( iter );
pango_layout_iter_free( iter );
#else
font_ascent_pango_units = pango_layout_get_baseline( layout );
#endif
pango_layout_get_extents( layout, NULL, &log_rect );
g_object_unref( G_OBJECT( layout ) );
font_descent_pango_units = log_rect.height - font_ascent_pango_units;
font_ascent = PANGO_PIXELS_CEIL( font_ascent_pango_units );
font_descent = PANGO_PIXELS_CEIL( font_descent_pango_units );
font_height = font_ascent + font_descent;
y_offset_bitmap_render_pango_units = ( font_ascent * PANGO_SCALE ) - font_ascent_pango_units;
}
virtual ~GLFontInternal(){
g_object_unref( G_OBJECT( ft2_context ) );
g_object_unref( G_OBJECT( fontmap ) );
}
// Renders the input text at the current location with the current color.
// The X position of the current location is used to place the left edge of the text image,
// where the text image bounds are defined as the logical extents of the line of text.
// The Y position of the current location is used to place the bottom of the text image.
// You should offset the Y position by the amount returned by gtk_glwidget_font_descent()
// if you want to place the baseline of the text image at the current Y position.
// Note: A problem with this function is that if the lower left corner of the text falls
// just a hair outside of the viewport (meaning the current raster position is invalid),
// then no text will be rendered. The solution to this is a very hacky one. You can search
// Google for "glDrawPixels clipping".
virtual void printString( const char *s ){
// The idea for this code initially came from the font-pangoft2.c example that comes with GtkGLExt.
PangoLayout *layout;
PangoRectangle log_rect;
FT_Bitmap bitmap;
unsigned char *begin_bitmap_buffer;
GLfloat color[4];
GLint previous_unpack_alignment;
GLboolean previous_blend_enabled;
GLint previous_blend_func_src;
GLint previous_blend_func_dst;
GLfloat previous_red_bias;
GLfloat previous_green_bias;
GLfloat previous_blue_bias;
GLfloat previous_alpha_scale;
layout = pango_layout_new( ft2_context );
pango_layout_set_width( layout, -1 ); // -1 no wrapping. All text on one line.
pango_layout_set_text( layout, s, -1 ); // -1 null-terminated string.
pango_layout_get_extents( layout, NULL, &log_rect );
if ( log_rect.width > 0 && log_rect.height > 0 ) {
bitmap.rows = font_ascent + font_descent;
bitmap.width = PANGO_PIXELS_CEIL( log_rect.width );
bitmap.pitch = -bitmap.width; // Rendering it "upside down" for OpenGL.
begin_bitmap_buffer = (unsigned char *) g_malloc( bitmap.rows * bitmap.width );
memset( begin_bitmap_buffer, 0, bitmap.rows * bitmap.width );
bitmap.buffer = begin_bitmap_buffer + ( bitmap.rows - 1 ) * bitmap.width; // See pitch above.
bitmap.num_grays = 0xff;
bitmap.pixel_mode = FT_PIXEL_MODE_GRAY;
pango_ft2_render_layout_subpixel( &bitmap, layout, -log_rect.x,
y_offset_bitmap_render_pango_units );
GlobalOpenGL().m_glGetFloatv( GL_CURRENT_COLOR, color );
// Save state. I didn't see any OpenGL push/pop operations for these.
// Question: Is saving/restoring this state necessary? Being safe.
GlobalOpenGL().m_glGetIntegerv( GL_UNPACK_ALIGNMENT, &previous_unpack_alignment );
previous_blend_enabled = GlobalOpenGL().m_glIsEnabled( GL_BLEND );
GlobalOpenGL().m_glGetIntegerv( GL_BLEND_SRC, &previous_blend_func_src );
GlobalOpenGL().m_glGetIntegerv( GL_BLEND_DST, &previous_blend_func_dst );
GlobalOpenGL().m_glGetFloatv( GL_RED_BIAS, &previous_red_bias );
GlobalOpenGL().m_glGetFloatv( GL_GREEN_BIAS, &previous_green_bias );
GlobalOpenGL().m_glGetFloatv( GL_BLUE_BIAS, &previous_blue_bias );
GlobalOpenGL().m_glGetFloatv( GL_ALPHA_SCALE, &previous_alpha_scale );
GlobalOpenGL().m_glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
GlobalOpenGL().m_glEnable( GL_BLEND );
GlobalOpenGL().m_glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
GlobalOpenGL().m_glPixelTransferf( GL_RED_BIAS, color[0] );
GlobalOpenGL().m_glPixelTransferf( GL_GREEN_BIAS, color[1] );
GlobalOpenGL().m_glPixelTransferf( GL_BLUE_BIAS, color[2] );
GlobalOpenGL().m_glPixelTransferf( GL_ALPHA_SCALE, color[3] );
GlobalOpenGL().m_glDrawPixels( bitmap.width, bitmap.rows,
GL_ALPHA, GL_UNSIGNED_BYTE, begin_bitmap_buffer );
g_free( begin_bitmap_buffer );
// Restore state in reverse order of how we set it.
GlobalOpenGL().m_glPixelTransferf( GL_ALPHA_SCALE, previous_alpha_scale );
GlobalOpenGL().m_glPixelTransferf( GL_BLUE_BIAS, previous_blue_bias );
GlobalOpenGL().m_glPixelTransferf( GL_GREEN_BIAS, previous_green_bias );
GlobalOpenGL().m_glPixelTransferf( GL_RED_BIAS, previous_red_bias );
GlobalOpenGL().m_glBlendFunc( previous_blend_func_src, previous_blend_func_dst );
if ( !previous_blend_enabled ) {
GlobalOpenGL().m_glDisable( GL_BLEND );
}
GlobalOpenGL().m_glPixelStorei( GL_UNPACK_ALIGNMENT, previous_unpack_alignment );
}
g_object_unref( G_OBJECT( layout ) );
}
virtual int getPixelAscent() const {
return font_ascent;
}
virtual int getPixelDescent() const {
return font_descent;
}
virtual int getPixelHeight() const {
return font_height;
}
};
GLFont *glfont_create( const char* font_string ){
return new GLFontInternal( font_string );
}
#elif 1
#include <pango/pangoft2.h>
#include <pango/pango-utils.h>
#include <gtk/gtkglwidget.h>
PangoFont* tryFont( const char* font_string, PangoFontDescription*& font_desc, GLuint font_list_base ){
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 );
}
GLFont *glfont_create( const char* font_string ){
GLuint font_list_base = glGenLists( 256 );
int font_height = 0, font_ascent = 0, font_descent = 0;
PangoFontDescription* font_desc = 0;
PangoFont* font = 0;
do
{
if( *font_string != '\0' )
if( ( font = tryFont( font_string, font_desc, font_list_base ) ) )
break;
#ifdef WIN32
if( ( font = tryFont( "arial 8", font_desc, font_list_base ) ) )
break;
if( ( font = tryFont( "fixed 8", font_desc, font_list_base ) ) )
break;
if( ( font = tryFont( "courier new 8", font_desc, font_list_base ) ) )
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 );
g_free( fontname );
} 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 );
#if 1 //FONT_SIZE_WORKAROUND
pango_layout_set_width( layout, -1 ); // -1 no wrapping. All text on one line.
pango_layout_set_text( layout, "_|The quick brown fox jumped over the lazy sleeping dog's back then sat on a tack.", -1 ); // -1 null-terminated string.
#endif
int font_ascent_pango_units = pango_layout_get_baseline( layout );
PangoRectangle log_rect;
pango_layout_get_extents( layout, NULL, &log_rect );
g_object_unref( G_OBJECT( layout ) );
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 );
// g_object_unref( G_OBJECT( ft2_context ) );
// g_object_unref( G_OBJECT( fontmap ) );
font_ascent = PANGO_PIXELS_CEIL( font_ascent_pango_units );
font_descent = PANGO_PIXELS_CEIL( font_descent_pango_units );
font_height = font_ascent + font_descent;
}
pango_font_description_free( font_desc );
ASSERT_MESSAGE( font != 0, "font for OpenGL rendering was not created" );
return new GLFontCallList( font_list_base, font_ascent, font_descent, font_height, fontmap, ft2_context );
}
#endif
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