some code in the exhibit ui, and first stab at laying out the

[laserbrain_demo] / src / ui.cc

diff --git a/src/ui.cc b/src/ui.cc
index 33fbccf..78c7ece 100644 (file)
--- a/src/ui.cc
+++ b/src/ui.cc
@@ -14,13 +14,23 @@ static bool init();
 struct Message {
        long start_time, show_until;
        char *str;
+       Vec3 color;
        Message *next;
 };
 static Message *msglist;
 
+struct Text {
+       char *str;
+       Vec2 pos;
+       Vec3 color;
+       Text *next;
+};
+static Text *txlist;
+
 static long timeout = 2000;
 static long trans_time = 250;
-static dtx_font *font;
+dtx_font *ui_font;
+int ui_font_size = FONTSZ;
 
 void set_message_timeout(long tm)
 {
@@ -30,13 +40,26 @@ void set_message_timeout(long tm)
 void show_message(const char *fmt, ...)
 {
        va_list ap;
+       va_start(ap, fmt);
+       show_messagev(timeout, Vec3(1, 1, 1), fmt, ap);
+       va_end(ap);
+}
+
+void show_message(long timeout, const Vec3 &color, const char *fmt, ...)
+{
+       va_list ap;
+       va_start(ap, fmt);
+       show_messagev(timeout, color, fmt, ap);
+       va_end(ap);
+}
+
+void show_messagev(long timeout, const Vec3 &color, const char *fmt, va_list ap)
+{
        char buf[512];
 
        init();
 
-       va_start(ap, fmt);
        vsnprintf(buf, sizeof buf, fmt, ap);
-       va_end(ap);
 
        Message *msg = new Message;
        int len = strlen(buf);
@@ -44,6 +67,7 @@ void show_message(const char *fmt, ...)
        memcpy(msg->str, buf, len + 1);
        msg->start_time = time_msec;
        msg->show_until = time_msec + timeout;
+       msg->color = color;
 
        Message dummy;
        dummy.next = msglist;
@@ -56,9 +80,36 @@ void show_message(const char *fmt, ...)
        msglist = dummy.next;
 }
 
+void print_text(const Vec2 &pos, const Vec3 &color, const char *fmt, ...)
+{
+       va_list ap;
+       va_start(ap, fmt);
+       print_textv(pos, color, fmt, ap);
+       va_end(ap);
+}
+
+void print_textv(const Vec2 &pos, const Vec3 &color, const char *fmt, va_list ap)
+{
+       char buf[512];
+
+       init();
+
+       vsnprintf(buf, sizeof buf, fmt, ap);
+
+       Text *tx = new Text;
+       int len = strlen(buf);
+       tx->str = new char[len + 1];
+       memcpy(tx->str, buf, len + 1);
+       tx->color = color;
+       tx->pos = Vec2(pos.x, -pos.y);
+
+       tx->next = txlist;
+       txlist = tx;
+}
+
 void draw_ui()
 {
-       if(!font) return;
+       if(!ui_font) return;
 
        while(msglist && msglist->show_until <= time_msec) {
                Message *msg = msglist;
@@ -67,7 +118,7 @@ void draw_ui()
                delete msg;
        }
 
-       dtx_use_font(font, FONTSZ);
+       dtx_use_font(ui_font, ui_font_size);
 
        glMatrixMode(GL_PROJECTION);
        glPushMatrix();
@@ -90,12 +141,27 @@ void draw_ui()
                long dur = msg->show_until - msg->start_time;
                float alpha = smoothstep(0, trans_time, t) *
                        (1.0 - smoothstep(dur - trans_time, dur, t));
-               glColor4f(1.0, 0.5, 0.1, alpha);
+               glColor4f(msg->color.x, msg->color.y, msg->color.z, alpha);
                glTranslatef(0, -dtx_line_height(), 0);
                dtx_string(msg->str);
                msg = msg->next;
        }
 
+       while(txlist) {
+               Text *tx = txlist;
+               txlist = txlist->next;
+
+               glMatrixMode(GL_MODELVIEW);
+               glLoadIdentity();
+               glTranslatef(tx->pos.x, tx->pos.y, 0);
+
+               glColor3f(tx->color.x, tx->color.y, tx->color.z);
+               dtx_string(tx->str);
+
+               delete [] tx->str;
+               delete tx;
+       }
+
        glPopAttrib();
 
        glMatrixMode(GL_PROJECTION);
@@ -111,10 +177,10 @@ static bool init()
 
        done_init = true;
 
-       if(!(font = dtx_open_font("data/ui.font", 0))) {
+       if(!(ui_font = dtx_open_font("data/ui.font", 0))) {
                fprintf(stderr, "failed to open font: data/ui.font\n");
                return false;
        }
-       dtx_prepare_range(font, FONTSZ, 32, 127);
+       dtx_prepare_range(ui_font, ui_font_size, 32, 127);
        return true;
 }