/*
-Copyright (c) 2001, Loki software, inc.
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without modification,
-are permitted provided that the following conditions are met:
-
-Redistributions of source code must retain the above copyright notice, this list
-of conditions and the following disclaimer.
-
-Redistributions in binary form must reproduce the above copyright notice, this
-list of conditions and the following disclaimer in the documentation and/or
-other materials provided with the distribution.
-
-Neither the name of Loki software nor the names of its contributors may be used
-to endorse or promote products derived from this software without specific prior
-written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
-DIRECT,INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
-ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
+ Copyright (c) 2001, Loki software, inc.
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+
+ Redistributions of source code must retain the above copyright notice, this list
+ of conditions and the following disclaimer.
+
+ Redistributions in binary form must reproduce the above copyright notice, this
+ list of conditions and the following disclaimer in the documentation and/or
+ other materials provided with the distribution.
+
+ Neither the name of Loki software nor the names of its contributors may be used
+ to endorse or promote products derived from this software without specific prior
+ written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ DIRECT,INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
// OpenGL widget based on GtkGLExt
typedef const attribs_t* configs_iterator;
int config_rgba32[] = {
- GDK_GL_RGBA,
- GDK_GL_DOUBLEBUFFER,
- GDK_GL_RED_SIZE, 8,
- GDK_GL_BLUE_SIZE, 8,
- GDK_GL_GREEN_SIZE, 8,
- GDK_GL_ALPHA_SIZE, 8,
- GDK_GL_ATTRIB_LIST_NONE,
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_RED_SIZE, 8,
+ GDK_GL_BLUE_SIZE, 8,
+ GDK_GL_GREEN_SIZE, 8,
+ GDK_GL_ALPHA_SIZE, 8,
+ GDK_GL_ATTRIB_LIST_NONE,
};
int config_rgba[] = {
- GDK_GL_RGBA,
- GDK_GL_DOUBLEBUFFER,
- GDK_GL_RED_SIZE, 1,
- GDK_GL_BLUE_SIZE, 1,
- GDK_GL_GREEN_SIZE, 1,
- GDK_GL_ALPHA_SIZE, 1,
- GDK_GL_ATTRIB_LIST_NONE,
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_RED_SIZE, 1,
+ GDK_GL_BLUE_SIZE, 1,
+ GDK_GL_GREEN_SIZE, 1,
+ GDK_GL_ALPHA_SIZE, 1,
+ GDK_GL_ATTRIB_LIST_NONE,
};
const attribs_t configs[] = {
- config_rgba32,
- config_rgba,
+ config_rgba32,
+ config_rgba,
};
-GdkGLConfig* glconfig_new()
-{
- GdkGLConfig* glconfig = NULL;
+GdkGLConfig* glconfig_new(){
+ GdkGLConfig* glconfig = NULL;
- for(configs_iterator i = configs, end = configs + 2; i != end && glconfig == NULL; ++i)
- {
- glconfig = gdk_gl_config_new(*i);
- }
+ for ( configs_iterator i = configs, end = configs + 2; i != end && glconfig == NULL; ++i )
+ {
+ glconfig = gdk_gl_config_new( *i );
+ }
- if(glconfig == NULL)
- {
- return gdk_gl_config_new_by_mode((GdkGLConfigMode)(GDK_GL_MODE_RGBA | GDK_GL_MODE_DOUBLE));
- }
+ if ( glconfig == NULL ) {
+ return gdk_gl_config_new_by_mode( (GdkGLConfigMode)( GDK_GL_MODE_RGBA | GDK_GL_MODE_DOUBLE ) );
+ }
- return glconfig;
+ return glconfig;
}
int config_rgba32_depth32[] = {
- GDK_GL_RGBA,
- GDK_GL_DOUBLEBUFFER,
- GDK_GL_RED_SIZE, 8,
- GDK_GL_BLUE_SIZE, 8,
- GDK_GL_GREEN_SIZE, 8,
- GDK_GL_ALPHA_SIZE, 8,
- GDK_GL_DEPTH_SIZE, 32,
- GDK_GL_ATTRIB_LIST_NONE,
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_RED_SIZE, 8,
+ GDK_GL_BLUE_SIZE, 8,
+ GDK_GL_GREEN_SIZE, 8,
+ GDK_GL_ALPHA_SIZE, 8,
+ GDK_GL_DEPTH_SIZE, 32,
+ GDK_GL_ATTRIB_LIST_NONE,
};
int config_rgba32_depth24[] = {
- GDK_GL_RGBA,
- GDK_GL_DOUBLEBUFFER,
- GDK_GL_RED_SIZE, 8,
- GDK_GL_BLUE_SIZE, 8,
- GDK_GL_GREEN_SIZE, 8,
- GDK_GL_ALPHA_SIZE, 8,
- GDK_GL_DEPTH_SIZE, 24,
- GDK_GL_ATTRIB_LIST_NONE,
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_RED_SIZE, 8,
+ GDK_GL_BLUE_SIZE, 8,
+ GDK_GL_GREEN_SIZE, 8,
+ GDK_GL_ALPHA_SIZE, 8,
+ GDK_GL_DEPTH_SIZE, 24,
+ GDK_GL_ATTRIB_LIST_NONE,
};
int config_rgba32_depth16[] = {
- GDK_GL_RGBA,
- GDK_GL_DOUBLEBUFFER,
- GDK_GL_RED_SIZE, 8,
- GDK_GL_BLUE_SIZE, 8,
- GDK_GL_GREEN_SIZE, 8,
- GDK_GL_ALPHA_SIZE, 8,
- GDK_GL_DEPTH_SIZE, 16,
- GDK_GL_ATTRIB_LIST_NONE,
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_RED_SIZE, 8,
+ GDK_GL_BLUE_SIZE, 8,
+ GDK_GL_GREEN_SIZE, 8,
+ GDK_GL_ALPHA_SIZE, 8,
+ GDK_GL_DEPTH_SIZE, 16,
+ GDK_GL_ATTRIB_LIST_NONE,
};
int config_rgba32_depth[] = {
- GDK_GL_RGBA,
- GDK_GL_DOUBLEBUFFER,
- GDK_GL_RED_SIZE, 8,
- GDK_GL_BLUE_SIZE, 8,
- GDK_GL_GREEN_SIZE, 8,
- GDK_GL_ALPHA_SIZE, 8,
- GDK_GL_DEPTH_SIZE, 1,
- GDK_GL_ATTRIB_LIST_NONE,
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_RED_SIZE, 8,
+ GDK_GL_BLUE_SIZE, 8,
+ GDK_GL_GREEN_SIZE, 8,
+ GDK_GL_ALPHA_SIZE, 8,
+ GDK_GL_DEPTH_SIZE, 1,
+ GDK_GL_ATTRIB_LIST_NONE,
};
int config_rgba_depth16[] = {
- GDK_GL_RGBA,
- GDK_GL_DOUBLEBUFFER,
- GDK_GL_RED_SIZE, 1,
- GDK_GL_BLUE_SIZE, 1,
- GDK_GL_GREEN_SIZE, 1,
- GDK_GL_ALPHA_SIZE, 1,
- GDK_GL_DEPTH_SIZE, 16,
- GDK_GL_ATTRIB_LIST_NONE,
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_RED_SIZE, 1,
+ GDK_GL_BLUE_SIZE, 1,
+ GDK_GL_GREEN_SIZE, 1,
+ GDK_GL_ALPHA_SIZE, 1,
+ GDK_GL_DEPTH_SIZE, 16,
+ GDK_GL_ATTRIB_LIST_NONE,
};
int config_rgba_depth[] = {
- GDK_GL_RGBA,
- GDK_GL_DOUBLEBUFFER,
- GDK_GL_RED_SIZE, 1,
- GDK_GL_BLUE_SIZE, 1,
- GDK_GL_GREEN_SIZE, 1,
- GDK_GL_ALPHA_SIZE, 1,
- GDK_GL_DEPTH_SIZE, 1,
- GDK_GL_ATTRIB_LIST_NONE,
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_RED_SIZE, 1,
+ GDK_GL_BLUE_SIZE, 1,
+ GDK_GL_GREEN_SIZE, 1,
+ GDK_GL_ALPHA_SIZE, 1,
+ GDK_GL_DEPTH_SIZE, 1,
+ GDK_GL_ATTRIB_LIST_NONE,
};
const attribs_t configs_with_depth[] =
{
- config_rgba32_depth32,
- config_rgba32_depth24,
- config_rgba32_depth16,
- config_rgba32_depth,
- config_rgba_depth16,
- config_rgba_depth,
+ config_rgba32_depth32,
+ config_rgba32_depth24,
+ config_rgba32_depth16,
+ config_rgba32_depth,
+ config_rgba_depth16,
+ config_rgba_depth,
};
-GdkGLConfig* glconfig_new_with_depth()
-{
- GdkGLConfig* glconfig = NULL;
+GdkGLConfig* glconfig_new_with_depth(){
+ GdkGLConfig* glconfig = NULL;
- for(configs_iterator i = configs_with_depth, end = configs_with_depth + 6; i != end && glconfig == NULL; ++i)
- {
- glconfig = gdk_gl_config_new(*i);
- }
+ for ( configs_iterator i = configs_with_depth, end = configs_with_depth + 6; i != end && glconfig == NULL; ++i )
+ {
+ glconfig = gdk_gl_config_new( *i );
+ }
- if(glconfig == NULL)
- {
- return gdk_gl_config_new_by_mode((GdkGLConfigMode)(GDK_GL_MODE_RGBA | GDK_GL_MODE_DOUBLE | GDK_GL_MODE_DEPTH));
- }
+ if ( glconfig == NULL ) {
+ return gdk_gl_config_new_by_mode( (GdkGLConfigMode)( GDK_GL_MODE_RGBA | GDK_GL_MODE_DOUBLE | GDK_GL_MODE_DEPTH ) );
+ }
- return glconfig;
+ return glconfig;
}
-GtkWidget* WINAPI gtk_glwidget_new (gboolean zbuffer, GtkWidget* share)
-{
- GtkWidget* drawing_area = gtk_drawing_area_new();
- GdkGLConfig* glconfig = (zbuffer) ? glconfig_new_with_depth() : glconfig_new();
- GdkGLContext* shared_context = (share) ? gtk_widget_get_gl_context(share) : NULL;
+GtkWidget* WINAPI gtk_glwidget_new( gboolean zbuffer, GtkWidget* share ){
+ GtkWidget* drawing_area = gtk_drawing_area_new();
+ GdkGLConfig* glconfig = ( zbuffer ) ? glconfig_new_with_depth() : glconfig_new();
+ GdkGLContext* shared_context = ( share ) ? gtk_widget_get_gl_context( share ) : NULL;
- gtk_widget_set_gl_capability (drawing_area, glconfig, shared_context, TRUE, GDK_GL_RGBA_TYPE);
+ gtk_widget_set_gl_capability( drawing_area, glconfig, shared_context, TRUE, GDK_GL_RGBA_TYPE );
- return drawing_area;
+ return drawing_area;
}
-void WINAPI gtk_glwidget_destroy_context (GtkWidget *widget)
-{
+void WINAPI gtk_glwidget_destroy_context( GtkWidget *widget ){
}
-void WINAPI gtk_glwidget_create_context (GtkWidget *widget)
-{
+void WINAPI gtk_glwidget_create_context( GtkWidget *widget ){
}
-void WINAPI gtk_glwidget_swap_buffers (GtkWidget *widget)
-{
- GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable (widget);
- gdk_gl_drawable_swap_buffers (gldrawable);
+void WINAPI gtk_glwidget_swap_buffers( GtkWidget *widget ){
+ GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable( widget );
+ gdk_gl_drawable_swap_buffers( gldrawable );
}
-gboolean WINAPI gtk_glwidget_make_current (GtkWidget *widget)
-{
- GdkGLContext *glcontext = gtk_widget_get_gl_context (widget);
- GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable (widget);
- return gdk_gl_drawable_gl_begin (gldrawable, glcontext);
+gboolean WINAPI gtk_glwidget_make_current( GtkWidget *widget ){
+ GdkGLContext *glcontext = gtk_widget_get_gl_context( widget );
+ GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable( widget );
+ return gdk_gl_drawable_gl_begin( gldrawable, glcontext );
}
// Units are pixels. Returns a positive value [most likely].
-int gtk_glwidget_font_ascent()
-{
- if (!_debug_font_created) {
- Error("Programming error: gtk_glwidget_font_ascent() called but font does not exist; "
- "you should have called gtk_glwidget_create_font() first");
- }
+int gtk_glwidget_font_ascent(){
+ if ( !_debug_font_created ) {
+ Error( "Programming error: gtk_glwidget_font_ascent() called but font does not exist; "
+ "you should have called gtk_glwidget_create_font() first" );
+ }
- return font_ascent;
+ return font_ascent;
}
// Units are pixels. Returns a positive value [most likely].
-int gtk_glwidget_font_descent()
-{
- if (!_debug_font_created) {
- Error("Programming error: gtk_glwidget_font_descent() called but font does not exist; "
- "you should have called gtk_glwidget_create_font() first");
- }
+int gtk_glwidget_font_descent(){
+ if ( !_debug_font_created ) {
+ Error( "Programming error: gtk_glwidget_font_descent() called but font does not exist; "
+ "you should have called gtk_glwidget_create_font() first" );
+ }
- return font_descent;
+ return font_descent;
}
-void gtk_glwidget_create_font()
-{
- PangoFontDescription *font_desc;
- PangoLayout *layout;
- PangoRectangle log_rect;
- int font_ascent_pango_units;
- int font_descent_pango_units;
-
- if (_debug_font_created) {
- Error("Programming error: gtk_glwidget_create_font() was already called; "
- "you must call gtk_glwidget_destroy_font() before creating font again");
- }
- _debug_font_created = 1;
-
- // This call is deprecated so we'll have to fix it sometime.
- ft2_context = pango_ft2_get_context(72, 72);
-
- font_desc = pango_font_description_from_string(font_string);
- pango_font_description_set_size(font_desc, font_height * PANGO_SCALE);
- pango_context_set_font_description(ft2_context, font_desc);
- pango_font_description_free(font_desc);
-
- layout = pango_layout_new(ft2_context);
-
- // I don't believe that's standard preprocessor syntax?
-#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);
+void gtk_glwidget_create_font(){
+ PangoFontDescription *font_desc;
+ PangoLayout *layout;
+ PangoRectangle log_rect;
+ int font_ascent_pango_units;
+ int font_descent_pango_units;
+
+ if ( _debug_font_created ) {
+ Error( "Programming error: gtk_glwidget_create_font() was already called; "
+ "you must call gtk_glwidget_destroy_font() before creating font again" );
+ }
+ _debug_font_created = 1;
+
+ // This call is deprecated so we'll have to fix it sometime.
+ ft2_context = pango_ft2_get_context( 72, 72 );
+
+ font_desc = pango_font_description_from_string( font_string );
+ pango_font_description_set_size( font_desc, font_height * PANGO_SCALE );
+ pango_context_set_font_description( ft2_context, font_desc );
+ pango_font_description_free( font_desc );
+
+ layout = pango_layout_new( ft2_context );
+
+ // I don't believe that's standard preprocessor syntax?
+#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);
+ 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;
+ 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);
- y_offset_bitmap_render_pango_units = (font_ascent * PANGO_SCALE) - font_ascent_pango_units;
+ font_ascent = PANGO_PIXELS_CEIL( font_ascent_pango_units );
+ font_descent = PANGO_PIXELS_CEIL( font_descent_pango_units );
+ y_offset_bitmap_render_pango_units = ( font_ascent * PANGO_SCALE ) - font_ascent_pango_units;
}
-void gtk_glwidget_destroy_font()
-{
- if (!_debug_font_created) {
- Error("Programming error: gtk_glwidget_destroy_font() called when font "
- "does not exist");
- }
-
- font_ascent = -1;
- font_descent = -1;
- y_offset_bitmap_render_pango_units = -1;
- g_object_unref(G_OBJECT(ft2_context));
- _debug_font_created = 0;
+void gtk_glwidget_destroy_font(){
+ if ( !_debug_font_created ) {
+ Error( "Programming error: gtk_glwidget_destroy_font() called when font "
+ "does not exist" );
+ }
+
+ font_ascent = -1;
+ font_descent = -1;
+ y_offset_bitmap_render_pango_units = -1;
+ g_object_unref( G_OBJECT( ft2_context ) );
+ _debug_font_created = 0;
}
// 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".
-void gtk_glwidget_print_string(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;
-
- if (!_debug_font_created) {
- Error("Programming error: gtk_glwidget_print_string() called but font does not exist; "
- "you should have called gtk_glwidget_create_font() first");
- }
-
- 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);
- qglGetFloatv(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.
- qglGetIntegerv(GL_UNPACK_ALIGNMENT, &previous_unpack_alignment);
- previous_blend_enabled = qglIsEnabled(GL_BLEND);
- qglGetIntegerv(GL_BLEND_SRC, &previous_blend_func_src);
- qglGetIntegerv(GL_BLEND_DST, &previous_blend_func_dst);
- qglGetFloatv(GL_RED_BIAS, &previous_red_bias);
- qglGetFloatv(GL_GREEN_BIAS, &previous_green_bias);
- qglGetFloatv(GL_BLUE_BIAS, &previous_blue_bias);
- qglGetFloatv(GL_ALPHA_SCALE, &previous_alpha_scale);
-
- qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- qglEnable(GL_BLEND);
- qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
- qglPixelTransferf(GL_RED_BIAS, color[0]);
- qglPixelTransferf(GL_GREEN_BIAS, color[1]);
- qglPixelTransferf(GL_BLUE_BIAS, color[2]);
- qglPixelTransferf(GL_ALPHA_SCALE, color[3]);
-
- qglDrawPixels(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.
- qglPixelTransferf(GL_ALPHA_SCALE, previous_alpha_scale);
- qglPixelTransferf(GL_BLUE_BIAS, previous_blue_bias);
- qglPixelTransferf(GL_GREEN_BIAS, previous_green_bias);
- qglPixelTransferf(GL_RED_BIAS, previous_red_bias);
- qglBlendFunc(previous_blend_func_src, previous_blend_func_dst);
- if (!previous_blend_enabled) { qglDisable(GL_BLEND); }
- qglPixelStorei(GL_UNPACK_ALIGNMENT, previous_unpack_alignment);
- }
-
- g_object_unref(G_OBJECT(layout));
+void gtk_glwidget_print_string( 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;
+
+ if ( !_debug_font_created ) {
+ Error( "Programming error: gtk_glwidget_print_string() called but font does not exist; "
+ "you should have called gtk_glwidget_create_font() first" );
+ }
+
+ 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 );
+ qglGetFloatv( 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.
+ qglGetIntegerv( GL_UNPACK_ALIGNMENT, &previous_unpack_alignment );
+ previous_blend_enabled = qglIsEnabled( GL_BLEND );
+ qglGetIntegerv( GL_BLEND_SRC, &previous_blend_func_src );
+ qglGetIntegerv( GL_BLEND_DST, &previous_blend_func_dst );
+ qglGetFloatv( GL_RED_BIAS, &previous_red_bias );
+ qglGetFloatv( GL_GREEN_BIAS, &previous_green_bias );
+ qglGetFloatv( GL_BLUE_BIAS, &previous_blue_bias );
+ qglGetFloatv( GL_ALPHA_SCALE, &previous_alpha_scale );
+
+ qglPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
+ qglEnable( GL_BLEND );
+ qglBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
+ qglPixelTransferf( GL_RED_BIAS, color[0] );
+ qglPixelTransferf( GL_GREEN_BIAS, color[1] );
+ qglPixelTransferf( GL_BLUE_BIAS, color[2] );
+ qglPixelTransferf( GL_ALPHA_SCALE, color[3] );
+
+ qglDrawPixels( 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.
+ qglPixelTransferf( GL_ALPHA_SCALE, previous_alpha_scale );
+ qglPixelTransferf( GL_BLUE_BIAS, previous_blue_bias );
+ qglPixelTransferf( GL_GREEN_BIAS, previous_green_bias );
+ qglPixelTransferf( GL_RED_BIAS, previous_red_bias );
+ qglBlendFunc( previous_blend_func_src, previous_blend_func_dst );
+ if ( !previous_blend_enabled ) {
+ qglDisable( GL_BLEND );
+ }
+ qglPixelStorei( GL_UNPACK_ALIGNMENT, previous_unpack_alignment );
+ }
+
+ g_object_unref( G_OBJECT( layout ) );
}
-void gtk_glwidget_print_char(char s)
-{
- char str[2];
- str[0] = s;
- str[1] = '\0';
- gtk_glwidget_print_string(str);
+void gtk_glwidget_print_char( char s ){
+ char str[2];
+ str[0] = s;
+ str[1] = '\0';
+ gtk_glwidget_print_string( str );
}
projects / xonotic / netradiant.git / blobdiff