forked from KolibriOS/kolibrios
115 lines
2.2 KiB
C
115 lines
2.2 KiB
C
#include "zgl.h"
|
|
|
|
int glRenderMode(int mode)
|
|
{
|
|
GLContext *c=gl_get_context();
|
|
int result=0;
|
|
|
|
switch(c->render_mode) {
|
|
case GL_RENDER:
|
|
break;
|
|
case GL_SELECT:
|
|
if (c->select_overflow) {
|
|
result=-c->select_hits;
|
|
} else {
|
|
result=c->select_hits;
|
|
}
|
|
c->select_overflow=0;
|
|
c->select_ptr=c->select_buffer;
|
|
c->name_stack_size=0;
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
switch(mode) {
|
|
case GL_RENDER:
|
|
c->render_mode=GL_RENDER;
|
|
break;
|
|
case GL_SELECT:
|
|
c->render_mode=GL_SELECT;
|
|
assert( c->select_buffer != NULL);
|
|
c->select_ptr=c->select_buffer;
|
|
c->select_hits=0;
|
|
c->select_overflow=0;
|
|
c->select_hit=NULL;
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
void glSelectBuffer(int size,unsigned int *buf)
|
|
{
|
|
GLContext *c=gl_get_context();
|
|
|
|
assert(c->render_mode != GL_SELECT);
|
|
|
|
c->select_buffer=buf;
|
|
c->select_size=size;
|
|
}
|
|
|
|
|
|
void glopInitNames(GLContext *c,GLParam *p)
|
|
{
|
|
if (c->render_mode == GL_SELECT) {
|
|
c->name_stack_size=0;
|
|
c->select_hit=NULL;
|
|
}
|
|
}
|
|
|
|
void glopPushName(GLContext *c,GLParam *p)
|
|
{
|
|
if (c->render_mode == GL_SELECT) {
|
|
assert(c->name_stack_size<MAX_NAME_STACK_DEPTH);
|
|
c->name_stack[c->name_stack_size++]=p[1].i;
|
|
c->select_hit=NULL;
|
|
}
|
|
}
|
|
|
|
void glopPopName(GLContext *c,GLParam *p)
|
|
{
|
|
if (c->render_mode == GL_SELECT) {
|
|
assert(c->name_stack_size>0);
|
|
c->name_stack_size--;
|
|
c->select_hit=NULL;
|
|
}
|
|
}
|
|
|
|
void glopLoadName(GLContext *c,GLParam *p)
|
|
{
|
|
if (c->render_mode == GL_SELECT) {
|
|
assert(c->name_stack_size>0);
|
|
c->name_stack[c->name_stack_size-1]=p[1].i;
|
|
c->select_hit=NULL;
|
|
}
|
|
}
|
|
|
|
void gl_add_select(GLContext *c,unsigned int zmin,unsigned int zmax)
|
|
{
|
|
unsigned int *ptr;
|
|
int n,i;
|
|
|
|
if (!c->select_overflow) {
|
|
if (c->select_hit==NULL) {
|
|
n=c->name_stack_size;
|
|
if ((c->select_ptr-c->select_buffer+3+n) >
|
|
c->select_size) {
|
|
c->select_overflow=1;
|
|
} else {
|
|
ptr=c->select_ptr;
|
|
c->select_hit=ptr;
|
|
*ptr++=c->name_stack_size;
|
|
*ptr++=zmin;
|
|
*ptr++=zmax;
|
|
for(i=0;i<n;i++) *ptr++=c->name_stack[i];
|
|
c->select_ptr=ptr;
|
|
c->select_hits++;
|
|
}
|
|
} else {
|
|
if (zmin<c->select_hit[1]) c->select_hit[1]=zmin;
|
|
if (zmax>c->select_hit[2]) c->select_hit[2]=zmax;
|
|
}
|
|
}
|
|
}
|