src/graphics/render.c

   1 /************************************************************************
   2 * object.c
   3 * voxelands - 3d voxel world sandbox game
   4 * Copyright (C) Lisa 'darkrose' Milne 2016 <lisa@ltmnet.com>
   5 *
   6 * This program is free software: you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation, either version 3 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * This program is distributed in the hope that it will be useful, but
  12 * WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  14 * See the GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program.  If not, see <http://www.gnu.org/licenses/>
  18 ************************************************************************/
  19
  20 #include "common.h"
  21 #include "graphics.h"
  22
  23 static struct {
  24         int ticks;
  25         int tticks;
  26         int tpf;
  27         int fticks;
  28         int font_init;
  29         float dtime;
  30 } render_data = {
  31         0,
  32         0,
  33         0,
  34         0,
  35         0,
  36         0.1
  37 };
  38
  39 /* clear the frame */
  40 void render_pre()
  41 {
  42         if (!render_data.ticks)
  43                 render_data.ticks = time_ticks();
  44         render_data.tpf = 1000/wm_data.frame_cap;
  45 }
  46
  47 /* render to frame */
  48 void render_post()
  49 {
  50         /* TODO: uncomment this
  51         ui_render();*/
  52
  53         /* TODO: uncomment this
  54         if (wm_data.cursor.mat)
  55                 render2d_quad_mat(wm_data.cursor.mat,mouse[CUR_X]+wm_data.cursor.x,mouse[CUR_Y]+wm_data.cursor.y,wm_data.cursor.w,wm_data.cursor.h);*/
  56
  57         /* should get this from sky when in-game */
  58         glClearColor(0, 0, 0, 1.0);
  59         /* smooth blending so the hud layer doesn't hide the game layer */
  60         glEnable(GL_BLEND);
  61         glEnable(GL_LINE_SMOOTH);
  62         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  63         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  64
  65         glDisable(GL_DEPTH_TEST);
  66
  67         render2d();
  68
  69         wm_update();
  70
  71         /* calculate a scale factor for smooth animations */
  72         render_data.tticks = interval_delay(render_data.ticks,wm_data.frame_cap);
  73         wm_data.fps = calc_fps(render_data.ticks,render_data.tticks);
  74         render_data.dtime = time_dtime(render_data.ticks);
  75         render_data.ticks = render_data.tticks;
  76 }