source: downloads/RenderSystems/GL/src/nvparse/ts1.0_inst_list.cpp @ 5

#include "ts1.0_inst_list.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "nvparse_errors.h"
#include "nvparse_externs.h"

#include <OgreGLPrerequisites.h>

using namespace Ogre;

const int instListInc = 4;

InstList::InstList()
{
        size = 0;
        max = instListInc;
        list = (InstPtr)malloc(sizeof(Inst) * max);
}

InstList::~InstList()
{
        free(list);
}

int InstList::Size()
{
        return size;
}

InstList& InstList::operator+=(InstPtr t)
{
        if (size == max) {
                /* Extend list size by instListInc amount */
                max += instListInc;
                list = (InstPtr)realloc(list, sizeof(Inst) * max);
        }
        list[size++] = *t;
        return *this;
}

void InstList::Invoke()
{
        int i;
        for (i = 0; i < size; i++) {
                // set active texture
                glActiveTextureARB(GL_TEXTURE0_ARB + i);
                list[i].Invoke();
        }
        // Reset active texture to unit 0
        // Could do a glGet to figure out what the initial active texunit was,
        // and reset to that, but the glGet would not behave well within
        // a display list...
        glActiveTextureARB(GL_TEXTURE0_ARB);
}

void InstList::Validate()
{
        if (size > TSP_NUM_TEXTURE_UNITS)
                errors.set("too many instructions");
        int i;
        for (i = 0; i < size; i++) {
                int stage = list[i].opcode.bits.stage;
                if (stage > i)
                        errors.set("prior stage missing");
                if (list[i].opcode.bits.instruction != list[i - stage].opcode.bits.instruction)
                        errors.set("stage mismatch");
                if (list[i].opcode.bits.dependent) {
                        int previousTexture = (int)list[i].args[0];
                        if (previousTexture >= i - stage)
                                errors.set("invalid texture reference");
                        if (list[previousTexture].opcode.bits.noOutput)
                                errors.set("no output on referenced texture");
                }
        }

        // Assign remaining undesignated texture units to nop
        for (; i < TSP_NUM_TEXTURE_UNITS; i++) {
                InstPtr nopInst = new Inst(TSP_NOP);
                *this += nopInst;
                delete nopInst;
        }
}

bool is_ts10(const char * s)
{
        return ! strncmp(s, "!!TS1.0", 7);
}

bool ts10_init_more()
{
        static bool tsinit = false;
        if (tsinit == false )
        {
      /*
                if(! glh_init_extensions( "GL_NV_texture_shader " "GL_ARB_multitexture " ))
                {
                        errors.set("unable to initialize GL_NV_texture_shader\n");
                        return false;
                }
                else
                {
        */
                        tsinit = true;
            /*
                }
        */
        }
        errors.reset();
        line_number = 1;
        return true;
}

/*

      else if(!strncmp(instring, "!!TS1.0", 7))
    {
        if (tsinit == 0 )
        {
            if(! glh_init_extensions( "GL_NV_texture_shader " "GL_ARB_multitexture " ))
            {
                errors.set("unable to initialize GL_NV_texture_shader\n");
                free(instring);
                return;
            }
            else
            {
                tsinit = 1;
            }
        }
        errors.reset();
        line_number = 1;
        ts10_init(instring+7);
        ts10_parse();
    }
    

  */