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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 <string.h>
#include "render/gl.h"
#include "render/textures.h"
#include "render/tga.h"
#include "render/pngfile.h"
#include "render/jpgfile.h"
#include "sys/sys.h"
#include "core/application.h"
namespace render
{
std::map<std::string, size_t> Textures::registry;
GLuint Textures::textures[MAXTEXTURES];
void Textures::init()
{
con_print << "^BLoading textures..." << std::endl;
if (registry.size()) {
clear();
} else {
memset(textures,0, sizeof(textures));
}
// "no texture" bitmap
load("textures/common/notex");
// gui font
if (!load("bitmaps/fonts/gui", false)) {
con_error << "Essential file bitmaps/fonts/gui missing" << std::endl;
core::application()->shutdown();
}
// loading screen background
load("bitmaps/loader");
// crosshairs
load("bitmaps/pointers/pointer");
load("bitmaps/pointers/aim");
load("bitmaps/pointers/center");
load("bitmaps/pointers/control");
load("bitmaps/pointers/target");
}
void Textures::shutdown()
{
clear();
}
void Textures::list()
{
for (iterator it = registry.begin(); it != registry.end(); it++) {
con_print << " " << (*it).first << " " << (*it).second << std::endl;
}
con_print << registry.size() << " loaded textures" << std::endl;
}
void Textures::clear()
{
for (size_t i=0; i < MAXTEXTURES; i++) {
if (textures[i]) {
glDeleteTextures(1, &textures[i]);
}
}
registry.clear();
memset(textures,0, sizeof(textures));
}
void Textures::unload(std::string name)
{
iterator it = registry.find(name);
if (it != registry.end()) {
con_debug << " unloading " << (*it).first << std::endl;
size_t id = (*it).second;
if (textures[id]) {
glDeleteTextures(1, &textures[id]);
}
registry.erase(it);
}
}
void Textures::unload(size_t id)
{
// find in map
for (iterator it = registry.begin(); it != registry.end(); it++) {
if ((*it).second == id) {
con_debug << " unloading " << (*it).first << std::endl;
size_t id = (*it).second;
if (textures[id]) {
glDeleteTextures(1, &textures[id]);
}
registry.erase(it);
break;
}
}
}
size_t Textures::load(std::string name, bool filter)
{
// check if it is already loaded
iterator it = registry.find(name);
if (it != registry.end())
return (*it).second;
// find first available texture
size_t id = 0;
while ((id < MAXTEXTURES) && (textures[id])) {
id++;
}
if (id == MAXTEXTURES) {
con_error << "Texture limit " << MAXTEXTURES << " exceeded!" << std::endl;
registry[name] = 0;
return 0;
}
std::string filename;
Image *image = 0;
if (!image) {
// try the png version
filename.assign(name);
filename.append(".png");
image = PNG::load(filename.c_str());
}
if (!image) {
// try the tga version
filename.assign(name);
filename.append(".tga");
image = TGA::load(filename.c_str());
}
if (!image) {
// try the jpg version
filename.assign(name);
filename.append(".jpg");
image = JPG::load(filename.c_str());
}
if (!image) {
// add to the registry with id 0 (texture not found)
con_warn << "Could not open " << filename << std::endl;
registry[name] = 0;
return 0;
}
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());
set_filter(filter);
// add to the registry
registry[name] = id;
// 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, bool filter)
{
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]);
set_filter(filter);
return id;
}
size_t Textures::bind(size_t texture, bool filter)
{
size_t id = texture;
if (!textures[id])
id = 0;
glBindTexture(GL_TEXTURE_2D, textures[id]);
set_filter(filter);
return id;
}
void Textures::set_filter(bool filter)
{
if (filter) {
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR_MIPMAP_LINEAR);
} else {
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
}
}
}
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