+/* $Id$
+
+This file is part of libmspgl
+Copyright © 2007 Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#include "except.h"
#include "texture.h"
+#include "texunit.h"
+
+using namespace std;
namespace Msp {
namespace GL {
+istream &operator>>(istream &in, TextureFilter &tf)
+{
+ string str;
+ in>>str;
+
+ if(str=="NEAREST")
+ tf=NEAREST;
+ else if(str=="LINEAR")
+ tf=LINEAR;
+ else if(str=="NEAREST_MIPMAP_NEAREST")
+ tf=NEAREST_MIPMAP_NEAREST;
+ else if(str=="NEAREST_MIPMAP_LINEAR")
+ tf=NEAREST_MIPMAP_LINEAR;
+ else if(str=="LINEAR_MIPMAP_NEAREST")
+ tf=LINEAR_MIPMAP_NEAREST;
+ else if(str=="LINEAR_MIPMAP_LINEAR")
+ tf=LINEAR_MIPMAP_LINEAR;
+ else
+ in.setstate(ios_base::failbit);
+
+ return in;
+}
+
+
void Texture::bind() const
{
- if(!target) return;
+ if(!target)
+ throw InvalidState("Attempt to bind a texture without target");
+
+ const Texture *cur=TexUnit::current().get_texture();
+ if(cur!=this)
+ {
+ if(cur && cur->target!=target)
+ glDisable(cur->target);
+ if(!cur || cur->target!=target)
+ glEnable(target);
+ glBindTexture(target, id);
+ TexUnit::current().set_texture(this);
+ }
+}
- glEnable(target);
- glBindTexture(target, id);
- bound=this;
+void Texture::bind_to(unsigned i) const
+{
+ TexUnit::activate(i);
+ bind();
}
void Texture::parameter(GLenum param, int value)
{
- if(bound!=this) bind();
+ maybe_bind();
glTexParameteri(target, param, value);
}
void Texture::parameter(GLenum param, float value)
{
- if(bound!=this) bind();
+ maybe_bind();
glTexParameterf(target, param, value);
}
-sizei Texture::get_width(int level) const
+Texture::~Texture()
{
- if(bound!=this) bind();
+ glDeleteTextures(1, &id);
+}
- int width;
- glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);
- return width;
+void Texture::unbind()
+{
+ const Texture *cur=TexUnit::current().get_texture();
+ if(!cur)
+ return;
+
+ glBindTexture(cur->target, 0);
+ glDisable(cur->target);
+ TexUnit::current().set_texture(0);
}
-sizei Texture::get_height(int level) const
+void Texture::unbind_from(unsigned i)
{
- if(bound!=this) bind();
+ TexUnit::activate(i);
+ unbind();
+}
- int height;
- glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);
- return height;
+Texture::Texture():
+ target(0)
+{
+ glGenTextures(1, &id);
}
-sizei Texture::get_depth(int level) const
+void Texture::maybe_bind() const
{
- if(bound!=this) bind();
+ if(TexUnit::current().get_texture()!=this)
+ bind();
+}
+
- int depth;
- glGetTexLevelParameteriv(target, level, GL_TEXTURE_DEPTH, &depth);
- return depth;
+Texture::Loader::Loader(Texture &t):
+ DataFile::ObjectLoader<Texture>(t)
+{
+ add("min_filter", &Loader::min_filter);
+ add("mag_filter", &Loader::mag_filter);
+ add("generate_mipmap", &Loader::generate_mipmap);
}
-Texture::~Texture()
+void Texture::Loader::min_filter(TextureFilter f)
{
- glDeleteTextures(1, &id);
+ obj.set_min_filter(f);
}
-Texture::Texture():
- target(0)
+void Texture::Loader::mag_filter(TextureFilter f)
{
- glGenTextures(1, &id);
+ obj.set_mag_filter(f);
}
-const Texture *Texture::bound=0;
+void Texture::Loader::generate_mipmap(bool gm)
+{
+ obj.parameter(GL_GENERATE_MIPMAP_SGIS, gm);
+}
} // namespace GL
} // namespace Msp