src/init.c

   1 #include "zgl.h"
   2
   3 GLContext *gl_ctx;
   4
   5
   6 void initSharedState(GLContext *c)
   7 {
   8         GLSharedState *s=&c->shared_state;
   9         s->lists=gl_zalloc(sizeof(GLList *) * MAX_DISPLAY_LISTS);
  10         s->texture_hash_table=
  11                 gl_zalloc(sizeof(GLTexture *) * TEXTURE_HASH_TABLE_SIZE);
  12
  13         alloc_texture(c,0);
  14 }
  15
  16 void endSharedState(GLContext *c)
  17 {
  18         GLSharedState *s=&c->shared_state;
  19         int i;
  20
  21         for(i=0;i<MAX_DISPLAY_LISTS;i++) {
  22                 /* TODO */
  23         }
  24         gl_free(s->lists);
  25
  26         gl_free(s->texture_hash_table);
  27 }
  28
  29
  30 void glInit(void *zbuffer1)
  31 {
  32         ZBuffer *zbuffer=(ZBuffer *)zbuffer1;
  33         GLContext *c;
  34         GLViewport *v;
  35         int i;
  36
  37         c=gl_zalloc(sizeof(GLContext));
  38         gl_ctx=c;
  39
  40         c->zb=zbuffer;
  41
  42         /* allocate GLVertex array */
  43         c->vertex_max = POLYGON_MAX_VERTEX;
  44         c->vertex = gl_malloc(POLYGON_MAX_VERTEX*sizeof(GLVertex));
  45
  46         /* viewport */
  47         v=&c->viewport;
  48         v->xmin=0;
  49         v->ymin=0;
  50         v->xsize=zbuffer->xsize;
  51         v->ysize=zbuffer->ysize;
  52         v->updated=1;
  53
  54         /* shared state */
  55         initSharedState(c);
  56
  57         /* lists */
  58
  59         c->exec_flag=1;
  60         c->compile_flag=0;
  61         c->print_flag=0;
  62
  63         c->in_begin=0;
  64
  65         /* lights */
  66         for(i=0;i<MAX_LIGHTS;i++) {
  67                 GLLight *l=&c->lights[i];
  68                 l->ambient=gl_V4_New(0,0,0,1);
  69                 l->diffuse=gl_V4_New(1,1,1,1);
  70                 l->specular=gl_V4_New(1,1,1,1);
  71                 l->position=gl_V4_New(0,0,1,0);
  72                 l->norm_position=gl_V3_New(0,0,1);
  73                 l->spot_direction=gl_V3_New(0,0,-1);
  74                 l->norm_spot_direction=gl_V3_New(0,0,-1);
  75                 l->spot_exponent=0;
  76                 l->spot_cutoff=180;
  77                 l->attenuation[0]=1;
  78                 l->attenuation[1]=0;
  79                 l->attenuation[2]=0;
  80                 l->enabled=0;
  81         }
  82         c->first_light=NULL;
  83         c->ambient_light_model=gl_V4_New(0.2,0.2,0.2,1);
  84         c->local_light_model=0;
  85         c->lighting_enabled=0;
  86         c->light_model_two_side = 0;
  87
  88         /* default materials */
  89         for(i=0;i<2;i++) {
  90                 GLMaterial *m=&c->materials[i];
  91                 m->emission=gl_V4_New(0,0,0,1);
  92                 m->ambient=gl_V4_New(0.2,0.2,0.2,1);
  93                 m->diffuse=gl_V4_New(0.8,0.8,0.8,1);
  94                 m->specular=gl_V4_New(0,0,0,1);
  95                 m->shininess=0;
  96         }
  97         c->current_color_material_mode=GL_FRONT_AND_BACK;
  98         c->current_color_material_type=GL_AMBIENT_AND_DIFFUSE;
  99         c->color_material_enabled=0;
 100
 101         /* textures */
 102         glInitTextures(c);
 103
 104         /* default state */
 105         c->current_color.X=1.0;
 106         c->current_color.Y=1.0;
 107         c->current_color.Z=1.0;
 108         c->current_color.W=1.0;
 109         c->longcurrent_color[0] = 65535;
 110         c->longcurrent_color[1] = 65535;
 111         c->longcurrent_color[2] = 65535;
 112
 113         c->current_normal.X=1.0;
 114         c->current_normal.Y=0.0;
 115         c->current_normal.Z=0.0;
 116         c->current_normal.W=0.0;
 117
 118         c->current_edge_flag=1;
 119
 120         c->current_tex_coord.X=0;
 121         c->current_tex_coord.Y=0;
 122         c->current_tex_coord.Z=0;
 123         c->current_tex_coord.W=1;
 124
 125         c->polygon_mode_front=GL_FILL;
 126         c->polygon_mode_back=GL_FILL;
 127
 128         c->current_front_face=0; /* 0 = GL_CCW  1 = GL_CW */
 129         c->current_cull_face=GL_BACK;
 130         c->current_shade_model=GL_SMOOTH;
 131         c->cull_face_enabled=0;
 132
 133         /* clear */
 134         c->clear_color.v[0]=0;
 135         c->clear_color.v[1]=0;
 136         c->clear_color.v[2]=0;
 137         c->clear_color.v[3]=0;
 138         c->clear_depth=0;
 139
 140         /* selection */
 141         c->render_mode=GL_RENDER;
 142         c->select_buffer=NULL;
 143         c->name_stack_size=0;
 144
 145         /* matrix */
 146         c->matrix_mode=0;
 147
 148         c->matrix_stack_depth_max[0]=MAX_MODELVIEW_STACK_DEPTH;
 149         c->matrix_stack_depth_max[1]=MAX_PROJECTION_STACK_DEPTH;
 150         c->matrix_stack_depth_max[2]=MAX_TEXTURE_STACK_DEPTH;
 151
 152         for(i=0;i<3;i++) {
 153                 c->matrix_stack[i]=gl_zalloc(c->matrix_stack_depth_max[i] * sizeof(M4));
 154                 c->matrix_stack_ptr[i]=c->matrix_stack[i];
 155         }
 156
 157         glMatrixMode(GL_PROJECTION);
 158         glLoadIdentity();
 159         glMatrixMode(GL_TEXTURE);
 160         glLoadIdentity();
 161         glMatrixMode(GL_MODELVIEW);
 162         glLoadIdentity();
 163
 164         c->matrix_model_projection_updated=1;
 165
 166         /* opengl 1.1 arrays */
 167         c->client_states = 0;
 168
 169         /* opengl 1.1 polygon offset */
 170         c->offset_states = 0;
 171
 172         /* clear the resize callback function pointer */
 173         c->gl_resize_viewport = NULL;
 174
 175         /* specular buffer */
 176         c->specbuf_first = NULL;
 177         c->specbuf_used_counter = 0;
 178         c->specbuf_num_buffers = 0;
 179
 180         /* depth test */
 181         c->depth_test = 0;
 182 }
 183
 184 void glClose(void)
 185 {
 186         GLContext *c=gl_get_context();
 187         endSharedState(c);
 188         gl_free(c);
 189 }