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1 #include <map>
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2 #include <string>
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3 #include "goatkit/goatkit.h"
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4 #include "opengl.h"
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5 #include "drawtext.h"
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6 #include "sdr.h"
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7
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8 #define VIS_THRES 0.005
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9
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10 using namespace goatkit;
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11
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12 extern int view_xsz, view_ysz;
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13 extern unsigned int prog_ui, prog_font;
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14 extern struct dtx_font *font;
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15
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16 static void draw_label(const Widget *w);
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17 static void draw_text(float x, float y, const char *text);
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18
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19 static struct {
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20 const char *name;
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21 WidgetDrawFunc func;
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22 } widget_funcs[] = {
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23 { "label", draw_label },
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24 {0, 0}
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25 };
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26
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27 static std::map<std::string, WidgetDrawFunc> funcmap;
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28
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29 __attribute__ ((used))
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30 extern "C" WidgetDrawFunc get_widget_func(const char *name)
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31 {
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32 static bool initialized;
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33
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34 if(!initialized) {
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35 for(int i=0; widget_funcs[i].func; i++) {
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36 funcmap[widget_funcs[i].name] = widget_funcs[i].func;
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37 }
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38 initialized = true;
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39 }
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40 return funcmap[name];
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41 }
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42
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43 static void begin_drawing(const Widget *w)
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44 {
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45 Vec2 pos = w->get_position();
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46
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47 glEnable(GL_BLEND);
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48 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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49
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50 gl_matrix_mode(GL_MODELVIEW);
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51 gl_push_matrix();
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52 gl_load_identity();
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53 gl_translatef(pos.x, pos.y, 0);
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54 }
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55
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56 static void end_drawing(const Widget *w)
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57 {
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58 gl_matrix_mode(GL_MODELVIEW);
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59 gl_pop_matrix();
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60 }
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61
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62 static void draw_label(const Widget *w)
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63 {
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64 Vec2 pos = w->get_position();
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65 float vis = w->get_visibility();
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66 if(vis < VIS_THRES) return;
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67
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68 begin_drawing(w);
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69 draw_text(pos.x, pos.y, w->get_text());
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70 end_drawing(w);
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71 }
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72
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73 static void draw_text(float x, float y, const char *text)
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74 {
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75 struct dtx_glyphmap *gmap = dtx_get_font_glyphmap_idx(font, 0);
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76 dtx_use_font(font, dtx_get_glyphmap_ptsize(gmap));
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77
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78 float aspect = (float)view_xsz / (float)view_ysz;
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79 float virt_xsz = 420.0 * aspect;
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80 float virt_ysz = 420.0;
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81
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82 gl_matrix_mode(GL_PROJECTION);
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83 gl_push_matrix();
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84 gl_load_identity();
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85 gl_ortho(0, virt_xsz, 0, virt_ysz, -1, 1);
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86
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87 gl_matrix_mode(GL_MODELVIEW);
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88 gl_push_matrix();
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89 gl_load_identity();
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90 gl_translatef(x * virt_xsz, y * virt_ysz, 0);
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91
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92 bind_program(prog_font);
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93 set_uniform_float4(prog_font, "ucolor", 1.0, 1.0, 1.0, 1.0);
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94 gl_apply_xform(prog_ui);
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95
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96 dtx_string(text);
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97
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98 gl_matrix_mode(GL_PROJECTION);
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99 gl_pop_matrix();
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100 gl_matrix_mode(GL_MODELVIEW);
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101 gl_pop_matrix();
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102 } |
