gui.h

   1 #ifndef GUI_H
   2 #define GUI_H
   3
   4 #include "font.h"
   5
   6 struct{
   7    struct gui_helper{
   8       const char *bindstr, *text;
   9    }
  10    helpers[4];
  11    u32 helper_count;
  12
  13    f32 factive;
  14    font3d font;
  15 }
  16 static gui;
  17
  18 VG_STATIC
  19 void gui_draw(void)
  20 {
  21    camera ortho;
  22
  23    float fl = 0.0f,
  24          fr = vg.window_x,
  25          fb = 0.0f,
  26          ft = vg.window_y,
  27          rl = 1.0f / (fr-fl),
  28          tb = 1.0f / (ft-fb);
  29
  30    m4x4_zero( ortho.mtx.p );
  31    ortho.mtx.p[0][0] = 2.0f * rl;
  32    ortho.mtx.p[1][1] = 2.0f * tb;
  33    ortho.mtx.p[3][0] = (fr + fl) * -rl;
  34    ortho.mtx.p[3][1] = (ft + fb) * -tb;
  35    ortho.mtx.p[3][3] = 1.0f;
  36    m4x3_identity( ortho.transform );
  37    camera_update_view( &ortho );
  38    m4x4_mul( ortho.mtx.p, ortho.mtx.v, ortho.mtx.pv );   /* HACK */
  39    camera_finalize( &ortho );
  40
  41    gui.factive = vg_lerpf( gui.factive, gui.helper_count?1.0f:0.0f,
  42                            vg.time_delta*2.0f );
  43
  44    if( gui.factive > 0.01f ){
  45       /* draw bottom bar */
  46       glEnable(GL_BLEND);
  47       glDisable(GL_DEPTH_TEST);
  48       glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
  49       glBlendEquation(GL_FUNC_ADD);
  50
  51       shader_blitcolour_use();
  52       shader_blitcolour_uColour( (v4f){ 0.0f, 0.0f, 0.0f, gui.factive*0.8f } );
  53       render_fsquad1();
  54    }
  55
  56    font3d_bind( &gui.font, &ortho );
  57
  58    float dy    = ft/0.79f,
  59          scale = dy*0x1p-4f*0.75f;
  60
  61    m4x3f mmdl;
  62    v4f q;
  63    m3x3_identity( mmdl );
  64    m3x3_scale( mmdl, (v3f){scale,scale,scale} );
  65    v3_zero( mmdl[3] );
  66
  67    float pad = dy*0x1p-4f*0.125f;
  68    mmdl[3][0] = pad*2.0f;
  69    mmdl[3][1] = pad;
  70
  71    for( u32 i=0; i<gui.helper_count; i++ ){
  72       struct gui_helper *helper = &gui.helpers[i];
  73
  74       shader_model_font_uColour( (v4f){1.0f,1.0f,1.0f,1.0f} );
  75
  76       struct font3d_render render;
  77       font3d_begin( &gui.font, 2, &ortho, mmdl, &render );
  78
  79       render.u8pch = (u8*)helper->bindstr;
  80       font3d_draw( &render );
  81
  82       const char *make_smaller = "\x02\xaf\x03 ";
  83       render.u8pch = (const u8*)make_smaller;
  84       font3d_draw( &render );
  85
  86       render.u8pch = (u8*)helper->text;
  87       font3d_draw( &render );
  88
  89       float w = render.offset[0]+1.0f;
  90       mmdl[3][0] += w*scale;
  91    }
  92
  93    gui.helper_count = 0;
  94 }
  95
  96 VG_STATIC
  97 void gui_helper_action( const char *bindstr, const char *text )
  98 {
  99    if( gui.helper_count >= vg_list_size(gui.helpers) )
 100       vg_fatal_error( "Too many helpers\n" );
 101
 102    struct gui_helper *helper = &gui.helpers[ gui.helper_count ++ ];
 103    helper->bindstr = bindstr;
 104    helper->text = text;
 105 }
 106
 107 VG_STATIC void gui_init(void)
 108 {
 109    font3d_load( &gui.font, "models/rs_font.mdl", vg_mem.rtmemory );
 110 }
 111
 112 #endif /* GUI_H */