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- #include "zgl.h"
- #include "msghandling.h"
-
- void glopViewport(GLContext *c,GLParam *p)
- {
- int xsize,ysize,xmin,ymin,xsize_req,ysize_req;
-
- xmin=p[1].i;
- ymin=p[2].i;
- xsize=p[3].i;
- ysize=p[4].i;
-
- /* we may need to resize the zbuffer */
-
- if (c->viewport.xmin != xmin ||
- c->viewport.ymin != ymin ||
- c->viewport.xsize != xsize ||
- c->viewport.ysize != ysize) {
-
- xsize_req=xmin+xsize;
- ysize_req=ymin+ysize;
-
- if (c->gl_resize_viewport &&
- c->gl_resize_viewport(c,&xsize_req,&ysize_req) != 0) {
- gl_fatal_error("glViewport: error while resizing display");
- }
-
- xsize=xsize_req-xmin;
- ysize=ysize_req-ymin;
- if (xsize <= 0 || ysize <= 0) {
- gl_fatal_error("glViewport: size too small");
- }
-
- tgl_trace("glViewport: %d %d %d %d\n",
- xmin, ymin, xsize, ysize);
- c->viewport.xmin=xmin;
- c->viewport.ymin=ymin;
- c->viewport.xsize=xsize;
- c->viewport.ysize=ysize;
-
- c->viewport.updated=1;
- }
- }
-
- void glopEnableDisable(GLContext *c,GLParam *p)
- {
- int code=p[1].i;
- int v=p[2].i;
-
- switch(code) {
- case GL_CULL_FACE:
- c->cull_face_enabled=v;
- break;
- case GL_LIGHTING:
- c->lighting_enabled=v;
- break;
- case GL_COLOR_MATERIAL:
- c->color_material_enabled=v;
- break;
- case GL_TEXTURE_2D:
- c->texture_2d_enabled=v;
- break;
- case GL_NORMALIZE:
- c->normalize_enabled=v;
- break;
- case GL_DEPTH_TEST:
- c->depth_test = v;
- break;
- case GL_POLYGON_OFFSET_FILL:
- if (v) c->offset_states |= TGL_OFFSET_FILL;
- else c->offset_states &= ~TGL_OFFSET_FILL;
- break;
- case GL_POLYGON_OFFSET_POINT:
- if (v) c->offset_states |= TGL_OFFSET_POINT;
- else c->offset_states &= ~TGL_OFFSET_POINT;
- break;
- case GL_POLYGON_OFFSET_LINE:
- if (v) c->offset_states |= TGL_OFFSET_LINE;
- else c->offset_states &= ~TGL_OFFSET_LINE;
- break;
- default:
- if (code>=GL_LIGHT0 && code<GL_LIGHT0+MAX_LIGHTS) {
- gl_enable_disable_light(c,code - GL_LIGHT0, v);
- } else {
- /*
- fprintf(stderr,"glEnableDisable: 0x%X not supported.\n",code);
- */
- }
- break;
- }
- }
-
- void glopShadeModel(GLContext *c,GLParam *p)
- {
- int code=p[1].i;
- c->current_shade_model=code;
- }
-
- void glopCullFace(GLContext *c,GLParam *p)
- {
- int code=p[1].i;
- c->current_cull_face=code;
- }
-
- void glopFrontFace(GLContext *c,GLParam *p)
- {
- int code=p[1].i;
- c->current_front_face=code;
- }
-
- void glopPolygonMode(GLContext *c,GLParam *p)
- {
- int face=p[1].i;
- int mode=p[2].i;
-
- switch(face) {
- case GL_BACK:
- c->polygon_mode_back=mode;
- break;
- case GL_FRONT:
- c->polygon_mode_front=mode;
- break;
- case GL_FRONT_AND_BACK:
- c->polygon_mode_front=mode;
- c->polygon_mode_back=mode;
- break;
- default:
- assert(0);
- }
- }
-
- void glopHint(GLContext *c,GLParam *p)
- {
- #if 0
- int target=p[1].i;
- int mode=p[2].i;
-
- /* do nothing */
- #endif
- }
-
- void
- glopPolygonOffset(GLContext *c, GLParam *p)
- {
- c->offset_factor = p[1].f;
- c->offset_units = p[2].f;
- }
-