git.mutantstargoat.com Git - demo_prior/blob - src/imtk/imtk.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <ctype.h>
   5 #include <assert.h>
   6 #include "opengl.h"
   7 #include "imtk.h"
   8 #include "state.h"
   9 #include "draw.h"
  10
  11 void imtk_post_redisplay(void)
  12 {
  13         glutPostRedisplay();
  14 }
  15
  16 void imtk_begin(void)
  17 {
  18         int width, height;
  19
  20         glPushAttrib(GL_ENABLE_BIT | GL_COLOR_BUFFER_BIT | GL_TRANSFORM_BIT);
  21
  22         glDisable(GL_DEPTH_TEST);
  23         glDisable(GL_STENCIL_TEST);
  24         glDisable(GL_ALPHA_TEST);
  25         glDisable(GL_TEXTURE_1D);
  26         glDisable(GL_TEXTURE_2D);
  27         glDisable(GL_CULL_FACE);
  28         glDisable(GL_SCISSOR_TEST);
  29         glDisable(GL_LIGHTING);
  30         glEnable(GL_BLEND);
  31         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  32
  33
  34         imtk_get_viewport(&width, &height);
  35
  36         glMatrixMode(GL_PROJECTION);
  37         glPushMatrix();
  38         glLoadIdentity();
  39         glTranslatef(-1, 1, 0);
  40         glScalef(2.0 / width, -2.0 / height, 1.0);
  41
  42         glMatrixMode(GL_MODELVIEW);
  43         glPushMatrix();
  44         glLoadIdentity();
  45 }
  46
  47 void imtk_end(void)
  48 {
  49         glMatrixMode(GL_PROJECTION);
  50         glPopMatrix();
  51         glMatrixMode(GL_MODELVIEW);
  52         glPopMatrix();
  53
  54         glPopAttrib();
  55 }
  56
  57 void imtk_label(const char *str, int x, int y)
  58 {
  59         if(x == IMTK_AUTO || y == IMTK_AUTO) {
  60                 imtk_layout_get_pos(&x, &y);
  61         }
  62
  63         glColor4fv(imtk_get_color(IMTK_TEXT_COLOR));
  64         imtk_draw_string(x, y + 14, str);
  65         imtk_layout_advance(imtk_string_size(str), 12);
  66 }