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/*
render/textures.cc
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#include "render/gl.h"
#include "render/textures.h"
#include "render/tga.h"
#include "sys/sys.h"
#include "core/application.h"
namespace render {
std::map<std::string, size_t> Textures::registry;
size_t Textures::index = 0;
GLuint Textures::textures[MAXTEXTURES];
void Textures::init()
{
clear();
con_print << "Loading textures..." << std::endl;
// "no texture" bitmap
load("textures/common/notex");
// console characters
if (load("bitmaps/conchars") == 0) {
con_error << "Essential file bitmaps/conchars missing" << std::endl;
core::application()->shutdown();
}
// loading screen background
load("bitmaps/loader");
// crosshairs
load("bitmaps/crosshair");
// light flares
load("bitmaps/fx/flare00");
load("bitmaps/fx/flare01");
}
void Textures::shutdown()
{
clear();
}
void Textures::clear()
{
if (index)
glDeleteTextures(index, textures);
registry.clear();
memset(textures,0, sizeof(textures));
index = 0;
}
size_t Textures::load(std::string name)
{
// check if it is already loaded
iterator it = registry.find(name);
if (it != registry.end())
return (*it).second;
// try the tga version
std::string filename(name);
filename.append(".tga");
Image *image = TGA::load(filename.c_str());
if (!image) {
// add to the registry with id 0 (texture not found)
registry[name] = 0;
return 0;
}
if (index == MAXTEXTURES) {
con_error << "Texture limit " << MAXTEXTURES << " exceeded!" << std::endl;
delete image;
registry[name] = 0;
return 0;
}
size_t id = index;
glGenTextures(1, &textures[id]);
glBindTexture(GL_TEXTURE_2D, textures[id]);
int texture_type;
if (image->channels() == 4)
texture_type = GL_RGBA;
else
texture_type = GL_RGB;
gluBuild2DMipmaps(GL_TEXTURE_2D, image->channels(),
image->width(), image->height(), texture_type, GL_UNSIGNED_BYTE, image->data());
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR_MIPMAP_LINEAR);
// add to the registry
registry[name] = id;
index++;
// delete image data
delete image;
return id;
}
size_t Textures::find(std::string name)
{
size_t id = 0;
iterator it = registry.find(name);
if (it != registry.end())
id = (*it).second;
return id;
}
size_t Textures::bind(std::string name)
{
size_t id = 0;
iterator it = registry.find(name);
if (it != registry.end())
id = (*it).second;
else
id = load(name);
glBindTexture(GL_TEXTURE_2D, textures[id]);
return id;
}
size_t Textures::bind(size_t texture)
{
size_t id = texture;
if (texture >= index)
id = 0;
glBindTexture(GL_TEXTURE_2D, textures[id]);
return id;
}
}
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