ARB
RNA3D_OpenGLGraphics.cxx
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1 #include "RNA3D_GlobalHeader.hxx"
2 #include "RNA3D_Global.hxx"
4 #include "RNA3D_Renderer.hxx"
5 #include "RNA3D_Textures.hxx"
7 
8 #include <awt_canvas.hxx>
10 
11 using namespace std;
12 
14  displayGrid(false),
15  ApplicationBGColor(0, 0, 0)
16 {}
17 
19 }
20 
21 // Sets the Background Color for the OpenGL Window
23  unsigned long bgColor;
24  XtVaGetValues(RNA3D->glw, XmNbackground, &bgColor, NULp);
25 
27 
28  XColor xcolor;
29  xcolor.pixel = bgColor;
30  Colormap colormap = DefaultColormapOfScreen(XtScreen(w));
31  XQueryColor(XtDisplay(w), colormap, &xcolor);
32 
33  float r = xcolor.red / 65535.0;
34  float g = xcolor.green / 65535.0;
35  float b = xcolor.blue / 65535.0;
36 
37  // set OpenGL background color to the widget's background
38  glClearColor(r, g, b, 1);
39 
40  ApplicationBGColor = ColorRGBf(r, g, b);
41 }
42 
43 // Converts the GC into RGB values
45  ColorRGBf clr = ColorRGBf(0, 0, 0);
48 
49  XGCValues xGCValues;
50  XGetGCValues(XtDisplay(w), xgc, GCForeground, &xGCValues);
51  unsigned long color = xGCValues.foreground;
52 
53  XColor xcolor;
54  xcolor.pixel = color;
55 
56  Colormap colormap = DefaultColormapOfScreen(XtScreen(w));
57  XQueryColor(XtDisplay(w), colormap, &xcolor);
58 
59  float r = xcolor.red / 65535.0;
60  float g = xcolor.green / 65535.0;
61  float b = xcolor.blue / 65535.0;
62 
63  clr = ColorRGBf(r, g, b);
64  return clr;
65 }
66 
67 // Converts the GC into RGB values and sets the glColor
69  ColorRGBf color = ConvertGCtoRGB(gc);
70  glColor4f(color.red, color.green, color.blue, 1);
71 }
72 
73 // Converts the GC into RGB values and returns them
75  ColorRGBf color = ConvertGCtoRGB(gc);
76  return color;
77 }
78 
79 void OpenGLGraphics::WinToScreenCoordinates(int x, int y, GLdouble *screenPos) {
80  // project window coords to gl coord
81  glLoadIdentity();
82  GLdouble modelMatrix[16];
83  glGetDoublev(GL_MODELVIEW_MATRIX, modelMatrix);
84  GLdouble projMatrix[16];
85  glGetDoublev(GL_PROJECTION_MATRIX, projMatrix);
86  GLint viewport[4];
87  glGetIntegerv(GL_VIEWPORT, viewport);
88  gluUnProject(x, y, 0,
89  modelMatrix,
90  projMatrix,
91  viewport,
92  // the next 3 parameters are the pointers to the final object coordinates.(double)
93  &screenPos[0], &screenPos[1], &screenPos[2]
94  );
95 }
96 
97 // =========== Functions related to rendering FONTS ========================//
98 
99 static GLuint font_base;
100 
101 void OpenGLGraphics::init_font(GLuint base, char* f) {
102  Display* display;
103  XFontStruct* font_info;
104  int first;
105  int last;
106 
107  // Need an X Display before calling any Xlib routines.
108  display = glXGetCurrentDisplay();
109  if (!display) {
110  fprintf(stderr, "XOpenDisplay() failed. Exiting.\n");
111  exit(EXIT_FAILURE);
112  }
113  else {
114  // Load the font.
115  font_info = XLoadQueryFont(display, f);
116  if (!font_info) {
117  fprintf(stderr, "XLoadQueryFont() failed - Exiting.\n");
118  exit(EXIT_FAILURE);
119  }
120  else {
121  // Tell GLX which font & glyphs to use.
122  first = font_info->min_char_or_byte2;
123  last = font_info->max_char_or_byte2;
124  glXUseXFont(font_info->fid, first, last-first+1, base+first);
125  }
126  display = NULp;
127  }
128 }
129 
130 void OpenGLGraphics::print_string(GLuint base, char* s) {
131  if (!glIsList(font_base)) {
132  fprintf(stderr, "print_string(): Bad display list. - Exiting.\n");
133  exit(EXIT_FAILURE);
134  }
135  else if (s && strlen(s)) {
136  glPushAttrib(GL_LIST_BIT);
137  glListBase(base);
138  glCallLists(strlen(s), GL_UNSIGNED_BYTE, (GLubyte *)s);
139  glPopAttrib();
140  }
141 }
142 
144  font_base = glGenLists(256);
145  if (!glIsList(font_base)) {
146  fprintf(stderr, "InitMainFont(): Out of display lists. - Exiting.\n");
147  exit(EXIT_FAILURE);
148  }
149  else {
150  init_font(font_base, f);
151  }
152 }
153 
154 void OpenGLGraphics::PrintString(float x, float y, float z, char *s, void * /* font */) {
155  glRasterPos3f(x, y, z);
157 }
158 
159 void OpenGLGraphics::DrawBox(float x, float y, float w, float h) {
160  glBegin(GL_QUADS);
161  glVertex2f(x-w/2, y-h/2);
162  glVertex2f(x+w/2, y-h/2);
163  glVertex2f(x+w/2, y+h/2);
164  glVertex2f(x-w/2, y+h/2);
165  glEnd();
166 }
static char * y[maxsp+1]
ColorRGBf GetColor(int gc)
STL namespace.
void DrawBox(float x, float y, float width, float height)
void WinToScreenCoordinates(int x, int y, GLdouble *screenPos)
void print_string(GLuint base, char *s)
Widget AW_get_AreaWidget(AW_window *aww, AW_area area)
#define false
Definition: ureadseq.h:13
AWT_canvas * gl_Canvas
void InitMainFont(char *f)
#define EXIT_FAILURE
Definition: arb_a2ps.c:157
GC AW_map_AreaGC(AW_window *aww, AW_area area, int gc)
void init_font(GLuint base, char *f)
static GLuint font_base
void PrintString(float x, float y, float z, char *s, void *font)
#define NULp
Definition: cxxforward.h:97
ColorRGBf ConvertGCtoRGB(int gc)
AW_window * aww
Definition: awt_canvas.hxx:337
RNA3D_Global * RNA3D
struct _WidgetRec * Widget
Definition: aw_base.hxx:48
GB_write_int const char s
Definition: AW_awar.cxx:156