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- /*$T misc.c GC 1.137 08/09/02 17:47:18 */
-
- /*$6
- +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
- +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
- */
-
- #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_BLEND:
- c->blending_enabled = v;
- break;
- 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 glopBlendFunc(GLContext *c, GLParam *p) {
- int sfactor = p[1].i;
- int dfactor = p[2].i;
-
- if(sfactor != GL_SRC_ALPHA || dfactor != GL_ONE_MINUS_SRC_ALPHA) {
- gl_fatal_error("Invalid blending functions combination\n");
- }
- }
-
- /* */
- 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;
- }
-