From b31a121291867c5865d76ae6fb2969980fa53ada Mon Sep 17 00:00:00 2001 From: Andy Spencer Date: Sun, 29 Apr 2012 05:53:12 +0000 Subject: [PATCH] Start work on info overlays --- src/plugins/env.c | 84 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) diff --git a/src/plugins/env.c b/src/plugins/env.c index 4691870..8b16466 100644 --- a/src/plugins/env.c +++ b/src/plugins/env.c @@ -223,6 +223,84 @@ static gboolean compass_click(GritsCallback *compass, GdkEvent *evnet, GritsView return TRUE; } +/* Info */ +static void info_expose(GritsCallback *compass, GritsOpenGL *opengl, gpointer _env) +{ + gint win_width = GTK_WIDGET(opengl)->allocation.width; + gint win_height = GTK_WIDGET(opengl)->allocation.height; + + /* Create cairo surface */ + guint tex = 0; + const gchar *label0 = "Location: %7.3lf°, %8.3lf°, %4.0fm"; + const gchar *label1 = "Cursor: %7.3lf°, %8.3lf°, %4.0fm"; + gdouble width = 300; + gdouble height = 200; + cairo_surface_t *surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height); + cairo_t *cairo = cairo_create(surface); + + /* Text */ + gdouble lat, lon, elev; + grits_viewer_get_location(GRITS_VIEWER(opengl), &lat, &lon, &elev); + gchar *text0 = g_strdup_printf(label0, lat, lon, elev); + gchar *text1 = g_strdup_printf(label1, lat, lon, elev); + + /* Draw outline */ + cairo_set_line_width(cairo, 3); + cairo_set_source_rgba(cairo, 0, 0, 0, 0.75); + cairo_move_to(cairo, 2, 20); cairo_text_path(cairo, text0); + cairo_move_to(cairo, 2, 40); cairo_text_path(cairo, text1); + cairo_stroke(cairo); + + /* Draw filler */ + cairo_set_source_rgba(cairo, 1, 1, 1, 1); + cairo_move_to(cairo, 2, 20); cairo_show_text(cairo, text0); + cairo_move_to(cairo, 2, 40); cairo_show_text(cairo, text1); + + /* Setup pango */ + PangoLayout *layout = pango_cairo_create_layout(cairo); + PangoFontDescription *font = pango_font_description_from_string("Mono 9"); + pango_layout_set_font_description(layout, font); + pango_font_description_free(font); + pango_layout_set_text(layout, text0, -1); + pango_cairo_update_layout(cairo, layout); + cairo_set_line_join(cairo, CAIRO_LINE_JOIN_ROUND); + cairo_move_to(cairo, 2, 40); + pango_cairo_layout_path(cairo, layout); + for (float w = 0.2; w <= 0.8; w+=0.2) { + cairo_set_line_width(cairo, (1-w)*8); + cairo_set_source_rgba(cairo, 0, 0, 0, w); + cairo_stroke_preserve(cairo); + } + cairo_set_source_rgba(cairo, 1, 1, 1, 1); + pango_cairo_show_layout(cairo, layout); + + /* Load GL texture */ + glEnable(GL_TEXTURE_2D); + glGenTextures(1, &tex); + glBindTexture(GL_TEXTURE_2D, tex); + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + glPixelStorei(GL_PACK_ALIGNMENT, 1); + glTexImage2D(GL_TEXTURE_2D, 0, 4, width, height, + 0, GL_BGRA, GL_UNSIGNED_BYTE, cairo_image_surface_get_data(surface)); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + + /* Draw surface */ + glDisable(GL_LIGHTING); + glDisable(GL_COLOR_MATERIAL); + glDisable(GL_DEPTH_TEST); + glEnable(GL_TEXTURE_2D); + glBindTexture(GL_TEXTURE_2D, tex); + glDisable(GL_CULL_FACE); + glTranslatef(win_width - width, win_height - height, 0); + glBegin(GL_QUADS); + glTexCoord2f(1, 0); glVertex3f(width, 0 , 0); // 0 - 3 0 + glTexCoord2f(1, 1); glVertex3f(width, height, 0); // 1 - | | + glTexCoord2f(0, 1); glVertex3f(0 , height, 0); // 2 - | | + glTexCoord2f(0, 0); glVertex3f(0 , 0 , 0); // 3 - 2----1 + glEnd(); +} + /*********** * Methods * ***********/ @@ -254,6 +332,12 @@ GritsPluginEnv *grits_plugin_env_new(GritsViewer *viewer, GritsPrefs *prefs) grits_object_set_cursor(GRITS_OBJECT(compass), GDK_CROSS); env->refs = g_list_prepend(env->refs, compass); + /* Add info */ + //GritsCallback *info = grits_callback_new(info_expose, env); + //grits_viewer_add(viewer, GRITS_OBJECT(info), GRITS_LEVEL_HUD, FALSE); + //env->refs = g_list_prepend(env->refs, info); + (void)info_expose; + /* Add background */ //GritsTile *background = grits_tile_new(NULL, NORTH, SOUTH, EAST, WEST); //glGenTextures(1, &env->tex); -- 2.43.2