2 Copyright (C) 2001-2006, William Joseph.
5 This file is part of GtkRadiant.
7 GtkRadiant is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 GtkRadiant is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GtkRadiant; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "globaldefs.h"
26 // generic string printing with call lists
27 class GLFontCallList : public GLFont
34 GLFontCallList( GLuint displayList, int asc, int desc, int pixelHeight ) : m_displayList( displayList ), m_pixelHeight( pixelHeight ), m_pixelAscent( asc ), m_pixelDescent( desc ){
36 virtual ~GLFontCallList(){
37 glDeleteLists( m_displayList, 256 );
39 void printString( const char *s ){
40 GlobalOpenGL().m_glListBase( m_displayList );
41 GlobalOpenGL().m_glCallLists( GLsizei( strlen( s ) ), GL_UNSIGNED_BYTE, reinterpret_cast<const GLubyte*>( s ) );
43 virtual int getPixelAscent() const {
46 virtual int getPixelDescent() const {
47 return m_pixelDescent;
49 virtual int getPixelHeight() const {
57 #include "debugging/debugging.h"
59 // LordHavoc: this is code for direct Xlib bitmap character fetching, as an
60 // alternative to requiring gtkglarea, it was created due to a lack of this
61 // package on SuSE 9.x but this package is now commonly shipping in Linux
62 // distributions so this code may be unnecessary, feel free however to enable
63 // it when building packages for distros that do not ship with that package,
64 // or if you just prefer less dependencies...
71 GLFont *glfont_create( const char* font_string ){
72 GLuint font_list_base;
73 XFontStruct *fontInfo;
74 Display *dpy = GDK_DISPLAY();
75 unsigned int i, first, last, firstrow, lastrow;
79 fontInfo = XLoadQueryFont( dpy, "-*-fixed-*-*-*-*-8-*-*-*-*-*-*-*" );
80 if ( fontInfo == NULL ) {
81 // try to load other fonts
82 fontInfo = XLoadQueryFont( dpy, "-*-fixed-*-*-*-*-*-*-*-*-*-*-*-*" );
85 if ( fontInfo == NULL ) {
86 fontInfo = XLoadQueryFont( dpy, "-*-*-*-*-*-*-*-*-*-*-*-*-*-*" );
89 if ( fontInfo == NULL ) {
90 ERROR_MESSAGE( "couldn't create font" );
94 first = (int)fontInfo->min_char_or_byte2;
95 last = (int)fontInfo->max_char_or_byte2;
96 firstrow = (int)fontInfo->min_byte1;
97 lastrow = (int)fontInfo->max_byte1;
99 * How many chars in the charset
101 maxchars = 256 * lastrow + last;
102 font_list_base = glGenLists( maxchars + 1 );
103 if ( font_list_base == 0 ) {
104 ERROR_MESSAGE( "couldn't create font" );
108 * Get offset to first char in the charset
110 firstbitmap = 256 * firstrow + first;
112 * for each row of chars, call glXUseXFont to build the bitmaps.
115 for ( i = firstrow; i <= lastrow; i++ )
117 glXUseXFont( fontInfo->fid, firstbitmap, last - first + 1, font_list_base + firstbitmap );
121 /* *height = fontInfo->ascent + fontInfo->descent;
122 *width = fontInfo->max_bounds.width; */
123 return new GLFontCallList( font_list_base, fontInfo->ascent, fontInfo->descent, fontInfo->ascent + fontInfo->descent );
128 #include <gtk/gtkglwidget.h>
130 GLFont *glfont_create( const char* font_string ){
131 GLuint font_list_base = glGenLists( 256 );
132 gint font_height = 0, font_ascent = 0, font_descent = 0;
134 PangoFontDescription* font_desc = pango_font_description_from_string( font_string );
136 PangoFont* font = gdk_gl_font_use_pango_font( font_desc, 0, 256, font_list_base );
139 pango_font_description_free( font_desc );
140 font_desc = pango_font_description_from_string( "fixed 8" );
141 font = gdk_gl_font_use_pango_font( font_desc, 0, 256, font_list_base );
145 pango_font_description_free( font_desc );
146 font_desc = pango_font_description_from_string( "courier new 8" );
147 font = gdk_gl_font_use_pango_font( font_desc, 0, 256, font_list_base );
151 PangoFontMetrics* font_metrics = pango_font_get_metrics( font, 0 );
153 font_ascent = pango_font_metrics_get_ascent( font_metrics );
154 font_descent = pango_font_metrics_get_descent( font_metrics );
155 font_height = font_ascent + font_descent;
157 font_ascent = PANGO_PIXELS( font_ascent );
158 font_descent = PANGO_PIXELS( font_descent );
159 font_height = PANGO_PIXELS( font_height );
161 pango_font_metrics_unref( font_metrics );
164 pango_font_description_free( font_desc );
166 // fix for pango/gtkglext metrix bug
167 if ( font_height > 256 ) {
171 return new GLFontCallList( font_list_base, font_ascent, font_descent, font_height );
175 // new font code ripped from ZeroRadiant
177 #include <pango/pangoft2.h>
178 #include <pango/pango-features.h>
179 #include <pango/pango-utils.h>
181 class GLFontInternal : public GLFont
183 const char *font_string;
187 int y_offset_bitmap_render_pango_units;
188 PangoContext *ft2_context;
189 PangoFontMap *fontmap;
192 GLFontInternal( const char *_font_string ) : font_string( _font_string ){
193 PangoFontDescription *font_desc;
195 PangoRectangle log_rect;
196 int font_ascent_pango_units;
197 int font_descent_pango_units;
199 #if !PANGO_VERSION_CHECK( 1,22,0 )
200 ft2_context = pango_ft2_get_context( 72, 72 );
202 fontmap = pango_ft2_font_map_new();
203 pango_ft2_font_map_set_resolution( PANGO_FT2_FONT_MAP( fontmap ), 72, 72 );
204 ft2_context = pango_font_map_create_context( fontmap );
207 font_desc = pango_font_description_from_string( font_string );
208 //pango_font_description_set_size(font_desc, 10 * PANGO_SCALE);
209 pango_context_set_font_description( ft2_context, font_desc );
210 pango_font_description_free( font_desc );
211 // TODO fallback to fixed 8, courier new 8
213 layout = pango_layout_new( ft2_context );
215 #ifdef FONT_SIZE_WORKAROUND
216 pango_layout_set_width( layout, -1 ); // -1 no wrapping. All text on one line.
217 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.
220 #if !PANGO_VERSION_CHECK( 1,22,0 )
221 PangoLayoutIter *iter;
222 iter = pango_layout_get_iter( layout );
223 font_ascent_pango_units = pango_layout_iter_get_baseline( iter );
224 pango_layout_iter_free( iter );
226 font_ascent_pango_units = pango_layout_get_baseline( layout );
228 pango_layout_get_extents( layout, NULL, &log_rect );
229 g_object_unref( G_OBJECT( layout ) );
230 font_descent_pango_units = log_rect.height - font_ascent_pango_units;
232 font_ascent = PANGO_PIXELS_CEIL( font_ascent_pango_units );
233 font_descent = PANGO_PIXELS_CEIL( font_descent_pango_units );
234 font_height = font_ascent + font_descent;
235 y_offset_bitmap_render_pango_units = ( font_ascent * PANGO_SCALE ) - font_ascent_pango_units;
238 virtual ~GLFontInternal(){
239 g_object_unref( G_OBJECT( ft2_context ) );
240 g_object_unref( G_OBJECT( fontmap ) );
243 // Renders the input text at the current location with the current color.
244 // The X position of the current location is used to place the left edge of the text image,
245 // where the text image bounds are defined as the logical extents of the line of text.
246 // The Y position of the current location is used to place the bottom of the text image.
247 // You should offset the Y position by the amount returned by gtk_glwidget_font_descent()
248 // if you want to place the baseline of the text image at the current Y position.
249 // Note: A problem with this function is that if the lower left corner of the text falls
250 // just a hair outside of the viewport (meaning the current raster position is invalid),
251 // then no text will be rendered. The solution to this is a very hacky one. You can search
252 // Google for "glDrawPixels clipping".
253 virtual void printString( const char *s ){
254 // The idea for this code initially came from the font-pangoft2.c example that comes with GtkGLExt.
257 PangoRectangle log_rect;
259 unsigned char *begin_bitmap_buffer;
261 GLint previous_unpack_alignment;
262 GLboolean previous_blend_enabled;
263 GLint previous_blend_func_src;
264 GLint previous_blend_func_dst;
265 GLfloat previous_red_bias;
266 GLfloat previous_green_bias;
267 GLfloat previous_blue_bias;
268 GLfloat previous_alpha_scale;
270 layout = pango_layout_new( ft2_context );
271 pango_layout_set_width( layout, -1 ); // -1 no wrapping. All text on one line.
272 pango_layout_set_text( layout, s, -1 ); // -1 null-terminated string.
273 pango_layout_get_extents( layout, NULL, &log_rect );
275 if ( log_rect.width > 0 && log_rect.height > 0 ) {
276 bitmap.rows = font_ascent + font_descent;
277 bitmap.width = PANGO_PIXELS_CEIL( log_rect.width );
278 bitmap.pitch = -bitmap.width; // Rendering it "upside down" for OpenGL.
279 begin_bitmap_buffer = (unsigned char *) g_malloc( bitmap.rows * bitmap.width );
280 memset( begin_bitmap_buffer, 0, bitmap.rows * bitmap.width );
281 bitmap.buffer = begin_bitmap_buffer + ( bitmap.rows - 1 ) * bitmap.width; // See pitch above.
282 bitmap.num_grays = 0xff;
283 bitmap.pixel_mode = FT_PIXEL_MODE_GRAY;
284 pango_ft2_render_layout_subpixel( &bitmap, layout, -log_rect.x,
285 y_offset_bitmap_render_pango_units );
286 GlobalOpenGL().m_glGetFloatv( GL_CURRENT_COLOR, color );
288 // Save state. I didn't see any OpenGL push/pop operations for these.
289 // Question: Is saving/restoring this state necessary? Being safe.
290 GlobalOpenGL().m_glGetIntegerv( GL_UNPACK_ALIGNMENT, &previous_unpack_alignment );
291 previous_blend_enabled = GlobalOpenGL().m_glIsEnabled( GL_BLEND );
292 GlobalOpenGL().m_glGetIntegerv( GL_BLEND_SRC, &previous_blend_func_src );
293 GlobalOpenGL().m_glGetIntegerv( GL_BLEND_DST, &previous_blend_func_dst );
294 GlobalOpenGL().m_glGetFloatv( GL_RED_BIAS, &previous_red_bias );
295 GlobalOpenGL().m_glGetFloatv( GL_GREEN_BIAS, &previous_green_bias );
296 GlobalOpenGL().m_glGetFloatv( GL_BLUE_BIAS, &previous_blue_bias );
297 GlobalOpenGL().m_glGetFloatv( GL_ALPHA_SCALE, &previous_alpha_scale );
299 GlobalOpenGL().m_glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
300 GlobalOpenGL().m_glEnable( GL_BLEND );
301 GlobalOpenGL().m_glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
302 GlobalOpenGL().m_glPixelTransferf( GL_RED_BIAS, color[0] );
303 GlobalOpenGL().m_glPixelTransferf( GL_GREEN_BIAS, color[1] );
304 GlobalOpenGL().m_glPixelTransferf( GL_BLUE_BIAS, color[2] );
305 GlobalOpenGL().m_glPixelTransferf( GL_ALPHA_SCALE, color[3] );
307 GlobalOpenGL().m_glDrawPixels( bitmap.width, bitmap.rows,
308 GL_ALPHA, GL_UNSIGNED_BYTE, begin_bitmap_buffer );
309 g_free( begin_bitmap_buffer );
311 // Restore state in reverse order of how we set it.
312 GlobalOpenGL().m_glPixelTransferf( GL_ALPHA_SCALE, previous_alpha_scale );
313 GlobalOpenGL().m_glPixelTransferf( GL_BLUE_BIAS, previous_blue_bias );
314 GlobalOpenGL().m_glPixelTransferf( GL_GREEN_BIAS, previous_green_bias );
315 GlobalOpenGL().m_glPixelTransferf( GL_RED_BIAS, previous_red_bias );
316 GlobalOpenGL().m_glBlendFunc( previous_blend_func_src, previous_blend_func_dst );
317 if ( !previous_blend_enabled ) {
318 GlobalOpenGL().m_glDisable( GL_BLEND );
320 GlobalOpenGL().m_glPixelStorei( GL_UNPACK_ALIGNMENT, previous_unpack_alignment );
323 g_object_unref( G_OBJECT( layout ) );
326 virtual int getPixelAscent() const {
329 virtual int getPixelDescent() const {
332 virtual int getPixelHeight() const {
337 GLFont *glfont_create( const char* font_string ){
338 return new GLFontInternal( font_string );