fragmentprog.cpp
上传用户:center1979
上传日期:2022-07-26
资源大小:50633k
文件大小:6k
- // fragmentprog.cpp
- //
- // Copyright (C) 2003 Chris Laurel <claurel@shatters.net>
- //
- // This program is free software; you can redistribute it and/or
- // modify it under the terms of the GNU General Public License
- // as published by the Free Software Foundation; either version 2
- // of the License, or (at your option) any later version.
- #include <iostream>
- #include <fstream>
- #include <string>
- #include <celutil/util.h>
- #include "gl.h"
- #include "glext.h"
- #include "fragmentprog.h"
- using namespace std;
- unsigned int fp::sphereShadowOnRings = 0;
- unsigned int fp::eclipseShadow1 = 0;
- unsigned int fp::eclipseShadow2 = 0;
- unsigned int fp::texDiffuse = 0;
- unsigned int fp::texDiffuseBump = 0;
- unsigned int fp::texSpecular = 0;
- unsigned int fp::texSpecularAlpha = 0;
- class FragmentProcessorNV : public FragmentProcessor
- {
- public:
- FragmentProcessorNV();
- virtual ~FragmentProcessorNV();
- virtual void enable();
- virtual void disable();
- virtual void use(unsigned int);
- virtual void parameter(fp::Parameter, float, float, float, float);
- virtual void parameter(fp::Parameter, const float*);
- };
- class FragmentProcessorARB : public FragmentProcessor
- {
- public:
- FragmentProcessorARB();
- virtual ~FragmentProcessorARB();
- virtual void enable();
- virtual void disable();
- virtual void use(unsigned int);
- virtual void parameter(fp::Parameter, float, float, float, float);
- virtual void parameter(fp::Parameter, const float*);
- };
- static string* ReadTextFromFile(const string& filename)
- {
- ifstream textFile(filename.c_str(), ios::in);
- if (!textFile.good())
- return NULL;
- string* s = new string();
- char c;
- while (textFile.get(c))
- *s += c;
- return s;
- }
- #if 0
- static int findLineNumber(const string& s, unsigned int index)
- {
- if (index >= s.length())
- return -1;
- int lineno = 1;
- for (unsigned int i = 0; i < index; i++)
- {
- if (s[i] == 'n')
- lineno++;
- }
- return lineno;
- }
- #endif
- static bool LoadNvFragmentProgram(const string& filename, unsigned int& id)
- {
- cout << _("Loading NV fragment program: ") << filename << 'n';
- string* source = ReadTextFromFile(filename);
- if (source == NULL)
- {
- cout << _("Error loading NV fragment program: ") << filename << 'n';
- return false;
- }
- glx::glGenProgramsNV(1, (GLuint*) &id);
- glx::glLoadProgramNV(GL_FRAGMENT_PROGRAM_NV,
- id,
- source->length(),
- reinterpret_cast<const GLubyte*>(source->c_str()));
- delete source;
- GLenum err = glGetError();
- if (err != GL_NO_ERROR)
- {
- GLint errPos = 0;
- glGetIntegerv(GL_PROGRAM_ERROR_POSITION_NV, &errPos);
- cout << _("Error in fragment program ") << filename << ' ' <<
- glGetString(GL_PROGRAM_ERROR_STRING_NV) << 'n';
- return false;
- }
- return true;
- }
- FragmentProcessor* fp::initNV()
- {
- cout << _("Initializing NV fragment programs . . .n");
- if (!LoadNvFragmentProgram("shaders/shadow_on_rings_nv.fp", sphereShadowOnRings))
- return NULL;
- if (!LoadNvFragmentProgram("shaders/eclipse1_nv.fp", eclipseShadow1))
- return NULL;
- if (!LoadNvFragmentProgram("shaders/eclipse2_nv.fp", eclipseShadow2))
- return NULL;
- if (!LoadNvFragmentProgram("shaders/diffuse_nv.fp", texDiffuse))
- return NULL;
- if (!LoadNvFragmentProgram("shaders/bumpdiffuse_nv.fp", texDiffuseBump))
- return NULL;
- if (!LoadNvFragmentProgram("shaders/texphong_nv.fp", texSpecular))
- return NULL;
- if (!LoadNvFragmentProgram("shaders/texphong_alpha_nv.fp", texSpecularAlpha))
- return NULL;
- cout << _("All NV fragment programs loaded successfully.n");
- return new FragmentProcessorNV();
- }
- FragmentProcessor* fp::initARB()
- {
- cout << _("Initializing ARB fragment programs . . .n");
- return new FragmentProcessorARB();
- }
- FragmentProcessor::FragmentProcessor()
- {
- }
- FragmentProcessor::~FragmentProcessor()
- {
- }
- void FragmentProcessor::parameter(fp::Parameter param, const Vec3f& v)
- {
- parameter(param, v.x, v.y, v.z, 0.0f);
- }
- void FragmentProcessor::parameter(fp::Parameter param, const Point3f& p)
- {
- parameter(param, p.x, p.y, p.z, 0.0f);
- }
- void FragmentProcessor::parameter(fp::Parameter param, const Color& c)
- {
- parameter(param, c.red(), c.green(), c.blue(), c.alpha());
- }
- // FragmentProcessorNV implementation
- FragmentProcessorNV::FragmentProcessorNV()
- {
- }
- FragmentProcessorNV::~FragmentProcessorNV()
- {
- }
- void FragmentProcessorNV::enable()
- {
- glEnable(GL_FRAGMENT_PROGRAM_NV);
- }
- void FragmentProcessorNV::disable()
- {
- glDisable(GL_FRAGMENT_PROGRAM_NV);
- }
- void FragmentProcessorNV::use(unsigned int prog)
- {
- glx::glBindProgramNV(GL_FRAGMENT_PROGRAM_NV, prog);
- }
- void FragmentProcessorNV::parameter(fp::Parameter param,
- float x, float y, float z, float w)
- {
- glx::glProgramLocalParameter4fARB(GL_FRAGMENT_PROGRAM_NV,
- param, x, y, z, w);
- }
- void FragmentProcessorNV::parameter(fp::Parameter param, const float* fv)
- {
- glx::glProgramLocalParameter4fvARB(GL_FRAGMENT_PROGRAM_NV, param, fv);
- }
- // FragmentProcessorARB implementation
- FragmentProcessorARB::FragmentProcessorARB()
- {
- }
- FragmentProcessorARB::~FragmentProcessorARB()
- {
- }
- void FragmentProcessorARB::enable()
- {
- //glEnable(GL_FRAGMENT_PROGRAM_ARB);
- }
- void FragmentProcessorARB::disable()
- {
- //glDisable(GL_FRAGMENT_PROGRAM_ARB);
- }
- void FragmentProcessorARB::use(unsigned int /*prog*/)
- {
- //glx::glBindProgramARB(GL_VERTEX_PROGRAM_ARB, prog);
- }
- void FragmentProcessorARB::parameter(fp::Parameter /*param*/,
- float /*x*/, float /*y*/,
- float /*z*/, float /*w*/)
- {
- //glx::glProgramEnvParameter4fARB(GL_FRAGMENT_PROGRAM_ARB, param, x, y, z, w);
- }
- void FragmentProcessorARB::parameter(fp::Parameter /*param*/, const float* /*fv*/)
- {
- //glx::glProgramEnvParameter4fvARB(GL_FRAGMENT_PROGRAM_ARB, param, fv);
- }