src/hid/common/hidgl.h

   1 /*
   2  *                            COPYRIGHT
   3  *
   4  *  PCB, interactive printed circuit board design
   5  *  Copyright (C) 2009-2011 PCB Contributors (See ChangeLog for details).
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  */
  22
  23 #ifndef PCB_HID_COMMON_HIDGL_H
  24 #define PCB_HID_COMMON_HIDGL_H
  25
  26 #ifdef WIN32
  27 #define _GLUfuncptr void *
  28 #endif
  29
  30 #define TRIANGLE_ARRAY_SIZE 5461
  31 typedef struct {
  32   GLfloat triangle_array [3 * 3 * TRIANGLE_ARRAY_SIZE];
  33   unsigned int triangle_count;
  34   unsigned int coord_comp_count;
  35 } triangle_buffer;
  36
  37 extern triangle_buffer buffer;
  38 extern float global_depth;
  39
  40 void hidgl_flush_triangles (triangle_buffer *buffer);
  41 void hidgl_ensure_triangle_space (triangle_buffer *buffer, int count);
  42
  43 static inline void
  44 hidgl_add_triangle_3D (triangle_buffer *buffer,
  45                        GLfloat x1, GLfloat y1, GLfloat z1,
  46                        GLfloat x2, GLfloat y2, GLfloat z2,
  47                        GLfloat x3, GLfloat y3, GLfloat z3)
  48 {
  49   buffer->triangle_array [buffer->coord_comp_count++] = x1;
  50   buffer->triangle_array [buffer->coord_comp_count++] = y1;
  51   buffer->triangle_array [buffer->coord_comp_count++] = z1;
  52   buffer->triangle_array [buffer->coord_comp_count++] = x2;
  53   buffer->triangle_array [buffer->coord_comp_count++] = y2;
  54   buffer->triangle_array [buffer->coord_comp_count++] = z2;
  55   buffer->triangle_array [buffer->coord_comp_count++] = x3;
  56   buffer->triangle_array [buffer->coord_comp_count++] = y3;
  57   buffer->triangle_array [buffer->coord_comp_count++] = z3;
  58   buffer->triangle_count++;
  59 }
  60
  61 static inline void
  62 hidgl_add_triangle (triangle_buffer *buffer,
  63                     GLfloat x1, GLfloat y1,
  64                     GLfloat x2, GLfloat y2,
  65                     GLfloat x3, GLfloat y3)
  66 {
  67   hidgl_add_triangle_3D (buffer, x1, y1, global_depth,
  68                                  x2, y2, global_depth,
  69                                  x3, y3, global_depth);
  70 }
  71
  72 void hidgl_draw_grid (BoxType *drawn_area, double coord_per_px);
  73 void hidgl_set_depth (float depth);
  74 void hidgl_draw_line (int cap, Coord width, Coord x1, Coord y1, Coord x2, Coord y2, double scale);
  75 void hidgl_draw_arc (Coord width, Coord vx, Coord vy, Coord vrx, Coord vry, Angle start_angle, Angle delta_angle, double scale);
  76 void hidgl_draw_rect (Coord x1, Coord y1, Coord x2, Coord y2);
  77 void hidgl_fill_circle (Coord vx, Coord vy, Coord vr, double scale);
  78 void hidgl_fill_polygon (int n_coords, Coord *x, Coord *y);
  79 void hidgl_fill_pcb_polygon (PolygonType *poly, const BoxType *clip_box, double scale);
  80 void hidgl_fill_rect (Coord x1, Coord y1, Coord x2, Coord y2);
  81
  82 void hidgl_init (void);
  83 void hidgl_start_render (void);
  84 void hidgl_finish_render (void);
  85 int hidgl_stencil_bits (void);
  86 int hidgl_assign_clear_stencil_bit (void);
  87 void hidgl_return_stencil_bit (int bit);
  88 void hidgl_reset_stencil_usage (void);
  89
  90 #endif /* PCB_HID_COMMON_HIDGL_H  */